1This document details the changes between this version, bash-4.0-release, 2and the previous version, bash-4.0-rc1. 3 41. Changes to Bash 5 6a. Changed the message printed when setlocale(3) fails to only include the 7 strerror error text if the call changes errno. 8 9b. Changed trap command execution to reset the line number before running a 10 trap (except DEBUG and RETURN traps). 11 12c. Fixed behavior of case-modifiying word expansions to not work on 13 individual words within a variable's value. 14 15d. Fixed a bug that caused mapfile to not be interruptible when run in an 16 interactive shell. 17 18e. Fixed a bug that caused mapfile to not run callbacks for the first line 19 read. 20 21f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive 22 shell. 23 24g. Fixed the coprocess reaping code to not run straight from a signal handler. 25 26h. Fixed a bug that caused printf -b to ignore the first % conversion specifier 27 in the format string on 64-bit systems. 28 29i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~' 30 appeared in $IFS. 31 32j. Fixed a bug that caused data corruption in the programmable completion code 33 when a shell function called from a completion aborted execution. 34 35k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be 36 capped at 100%. 37 38l. Changed behavior of shell when -e option is in effect to reflect consensus 39 of Posix shell standardization working group. 40 41m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not 42 be displayed by `type' or `declare' when appearing in functions under 43 certain circumstances. 44 452. Changes to Readline 46 47a. Fixed a bug that caused !(...) extended glob patterns to inhibit later 48 history expansion. 49 50b. Reworked the signal handling to avoid calling disallowed functions from a 51 signal handler. 52 533. New Features in Bash 54 55a. `readarray' is now a synonym for `mapfile'. 56------------------------------------------------------------------------------ 57This document details the changes between this version, bash-4.0-rc1, 58and the previous version, bash-4.0-beta2. 59 601. Changes to Bash 61 62a. Fixed a bug that caused parsing errors when a $()-style command 63 substitution was follwed immediately by a quoted newline. 64 65b. Fixed a bug that caused extended shell globbing patterns beginning with 66 `*(' to not work when used with pattern substitution word expansions. 67 68------------------------------------------------------------------------------ 69This document details the changes between this version, bash-4.0-beta2, 70and the previous version, bash-4.0-beta. 71 721. Changes to Bash 73 74a. Fixed a bug that caused failed word expansions to set $? but not 75 PIPESTATUS. 76 77b. Changed filename completion to quote the tilde in a filename with a 78 leading tilde that exists in the current directory. 79 80c. Fixed a bug that caused a file descriptor leak when performing 81 redirections attached to a compound command. 82 83d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if 84 the -u option was enabled and there were no posititional parameters. 85 86e. Fixed a bug that resulted in bash not terminating immediately if a 87 terminating signal was received while performing output. 88 89f. Fixed a bug that caused the shell to crash after creating 256 process 90 substitutions during word completion. 91 922. Changes to Readline 93 94a. Fixed a bug that caused redisplay errors when using prompts with invisible 95 characters and numeric arguments to a command in a multibyte locale. 96 97b. Fixed a bug that caused redisplay errors when using prompts with invisible 98 characters spanning more than two physical screen lines. 99 100------------------------------------------------------------------------------ 101This document details the changes between this version, bash-4.0-beta, 102and the previous version, bash-4.0-alpha. 103 1041. Changes to Bash 105 106a. Fixed a typo that caused a variable to be used before initialization 107 while parsing Posix-style command substitutions. 108 109b. Fixed a bug that caused stray ^? when the expansion of a parameter used 110 as part of a pattern removal expansion is empty, but part of a non- 111 empty string. 112 113c. Fixed a bug that could cause strings not converted to numbers by strtol 114 to be treated as if the conversion had been successful. 115 116d. The `return' builtin now accepts no options and requires a `--' before 117 a negative return value, as Posix requires. 118 119e. Fixed a bug that caused local variables to be created with the empty 120 string for a value rather than no value. 121 122f. Changed behavior so the shell now acts as if it received an interrupt 123 when a pipeline is killed by SIGINT while executing a list. 124 125g. Fixed a bug that caused `declare var' and `typeset var' to initialize 126 `var' to the empty string. 127 128h. Changed `bind' builtin to print a warning but proceed if invoked when 129 line editing is not active. 130 131i. Fixed a bug that caused the shell to exit when the `errexit' option is 132 set and a command in a pipeline returns a non-zero exit status. 133 134j. Fixed a bug that caused the shell to not run the exit trap in a command 135 run with `bash -c' under some circumstances. 136 137k. Fixed a bug that caused parser errors to occasionally not set $? when 138 running commands with `eval'. 139 140l. Fixed a bug that caused stray control characters when evaluating compound 141 array assignments containing $'\x7f' escapes. 142 143m. Fixed a bug that caused redirections involving file descriptor 10 as the 144 target to behave incorrectly. 145 146n. Fixed a bug that could cause memory to be freed multiple times when 147 assigning to COMP_WORDBREAKS. 148 149o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS 150 was unset. 151 1522. Changes to Readline 153 1543. New Features in Bash 155 156a. A value of 0 for the -t option to `read' now returns success if there is 157 input available to be read from the specified file descriptor. 158 159b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged 160 mode. 161 162c. New bindable readline functions shell-forward-word and shell-backward-word, 163 which move forward and backward words delimited by shell metacharacters 164 and honor shell quoting. 165 166d. New bindable readline functions shell-backward-kill-word and shell-kill-word 167 which kill words backward and forward, but use the same word boundaries 168 as shell-forward-word and shell-backward-word. 169 1704. New Features in Readline 171 172a. If the kernel supports it, readline displays special characters 173 corresponding to a keyboard-generated signal when the signal is received. 174 175------------------------------------------------------------------------------ 176This document details the changes between this version, bash-4.0-alpha, 177and the previous version, bash-3.2-release. 178 1791. Changes to Bash 180 181a. Fixed several bugs in old-style `` command substitution parsing, including 182 comment parsing and quoted string handling. 183 184b. Fixed problems parsing arguments to the [[ command's =~ regular expression 185 matching operator: metacharacter and whitespace parsing. 186 187c. Fixed a bug that caused the shell to inappropriately reuse high-numbered 188 file descriptors it used internally. 189 190d. Fixed a bug in pattern replacement word expansions that caused a `/' as 191 the first character of an expanded pattern to be mistaken for a global 192 replacement specifier. 193 194e. Fixed several problems with the asprintf and snprintf replacement functions 195 that caused hangs and crashes. 196 197f. Fixed a bug in the calculation of the current and previous job that caused 198 it to refer to incorrect jobs. 199 200g. Fixed a bug in the check for the validity of a hashed command pathname that 201 caused unnecessary hash table deletions and additions. 202 203h. Fixed a bug that caused child processes to inherit the wrong value for $!. 204 205i. Fixed a bug that caused `.' to fail to read and execute commands from non- 206 regular files such as devices or named pipes. 207 208j. Fixed a bug in printf formatting for the %x and %X expansions that occurred 209 on some systems. 210 211k. Fixed a bug that caused the shell to crash when creating temporary files if 212 $TMPDIR named a non-writable directory. 213 214l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary 215 files under some circumstances. 216 217m. Fixed a bug that caused named pipes created by process substitution to not 218 be cleaned up. 219 220n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared 221 in the initial shell environment. 222 223o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted) 224 when IFS is null or contains non-whitespace characters; the same changes 225 apply to arrays subscripted with * or @. 226 227p. Fixed several problems with pattern substitution expansions on the 228 positional parameters and arrays subscripted with * or @ that occurred 229 when $IFS was set to the empty string. 230 231q. Made a change to the default locale initialization code that should 232 result in better behavior from the locale-aware library functions. 233 234r. Fixed a bug that caused compacting the jobs list to drop jobs. 235 236s. Fixed a bug that caused jumps back to the top-level processing loop from 237 a builtin command to leave the shell in an inconsistent state. 238 239t. Fixed a bug that caused characters that would be escaped internally to be 240 doubled when escaped with a backslash. 241 242u. Fixed the initialization of mailboxes to not cause maildirs to be read 243 (and stat(2) called for every message file) at shell startup. 244 245v. Fixed a bug that caused the shell to not display $PS2 when the read builtin 246 reads a line continued with a backslash. 247 248w. Fixed a bug that caused errors in word splitting when $IFS contained 249 characters used for internal quoting. 250 251x. Fixed bugs that caused problems with output from shell builtins not being 252 completely displayed on some systems. 253 254y. Fixed a bug that caused output to be lost when a redirection is acting on 255 the shell's output file descriptor. 256 257z. Fixed bugs caused by shell builtins not checking for all write errors. 258 259aa. Fixed a problem that caused the shell to dump core if expansions on the 260 pattern passed to the pattern removal word expansions resulted in expansion 261 errors. 262 263bb. Fixed a bug that caused bash to loop infinitely after creating and 264 waiting for 4096 jobs. 265 266cc. Fixed a bug that caused bash to lose the status of a background job under 267 certain circumstances. 268 269dd. Fixed a bug that caused bash to not look in the temporary environment 270 when performing variable lookup under certain circumstances. 271 272ee. Fixed a bug that caused bash to close file descriptors greater than 10 273 when they were used in redirections. 274 275ff. Fixed a problem that caused the shell to attempt to read from the standard 276 input when called as `bash -i script'. 277 278gg. Fixed a memory leak and variable initialization problems when the -v option 279 was supplied to `printf' that could cause incorrect results. 280 281hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option 282 was supplied, rather than (possibly multibyte) characters. 283 284ii. Fixed a bug when displaying a function due to not converting the function 285 to an external form. 286 287jj. Changed job control initialization to ensure that the shell has a tty 288 as its controlling terminal before enabling job control. 289 290kk. Fixed a bug with the `test' builtin that caused it to misinterpret 291 arguments beginning with `-' but containing more than one character. 292 293ll. Fixed bug that could cause the shell to dump core in certain cases where 294 a command sets the SIGINT disposition to the default. 295 296mm. Fixed a bug in the pattern replacement (affecting both word expansion 297 and the `fc' builtin) that occurred when the pattern and replacement 298 strings were empty. 299 300nn. Fixed a bug that caused an arithmetic evaluation error to disable all 301 further evaluation. 302 303oo. Fixed a bug in pathname expansion that caused it to interpret backslashes 304 in the pathname as quoting characters. 305 306pp. Fixed a bug in the replacement getcwd() implementation that could cause 307 memory to be overwritten. 308 309qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for 310 the `-c' and `-f' options. 311 312rr. Brace expansion now allows process substitutions to pass through unchanged. 313 314ss. Fixed a problem in the command name completion code to avoid quoting 315 escaped special characters twice when the command name begins with a tilde. 316 317tt. Fixed a problem in the printf builtin that resulted in single-byte 318 output for the "'" escape, even when using multibyte characters. 319 320uu. Fixed a bug that caused the failure exit status to be lost when redirections 321 attached to a compound command failed. 322 323vv. Fixed a bug that caused the internal random number generator to not be 324 re-seeded correctly when creating a subshell. 325 326ww. Fixed a bug that could cause the bash replacement getcwd to overwrite 327 memory. 328 329xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent 330 while the shell was waiting for a command substitution to terminate, and 331 make sure the exit status is correct when it does. 332 333yy. Fixed a bug that resulted in the second and subsequent children spawned 334 by a shell begun to run a command substitution being placed into the 335 wrong process group. 336 337zz. Fixed a bug that caused the results of successful tilde expansion to be 338 subject to pathname expansion and word splitting. 339 340aaa. Fixed a bug that could cause the shell to hang if it encountered an 341 error that caused it to jump back to the top processing loop during a 342 command substitution or `eval' command. 343 344bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes 345 instead of those of the file descriptor passed with the -u option when 346 processing the -n and -d options. 347 348ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the 349 first character of $IFS was not whitespace. 350 351ddd. Fixed a bug that occurred when scanning for the ending delimiter of a 352 ${parameter/pat/sub} expansion. 353 354eee. Fixed a bug that caused the shell to inappropriately expand command 355 substitutions in words when expanding directory names for completion. 356 357fff. Fixed a bug that caused the `fc' builtin to look too far back in the 358 history list under certain circumstances. 359 360ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for 361 a file specified as an argument to source/. when the file was not found 362 in $PATH. 363 364hhh. Fixed a bug that caused the shell to modify the case of a command word 365 found via command completion when the shell was performing case- 366 insensitive completion. 367 368iii. Fixed a bug that caused the shell to search $PATH for an argument to 369 source/. even when it contained a `/'. 370 371jjj. Fixed a bug that caused brace expansion to misorder expansions when the 372 locale did not have a collating order like aAbBcC...zZ. 373 374kkk. Fixed a bug that did not allow `set +o history' to have any effect when 375 run in a startup file or from a sourced file. 376 377lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator. 378 379mmm. Fixed a bug that caused side effects of temporary variable assignments 380 to persist in the shell environment. 381 382nnn. Fixed a bug that caused the terminal to be left in non-canonical mode 383 when using editing commands that invoke the an editor on the current 384 command line. 385 386ooo. Fixed a bug that caused globbing characters and characters in $IFS to not 387 be quoted appropriately when displaying assignment statements. 388 389ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a 390 file or evaluating a command with `eval' even if the return value of the 391 command was supposed to be ignored. 392 393qqq. Fixed a bug that caused the shell to attempt to created variables with 394 invalid names if such names appeared in the initial environment. 395 396rrr. Fixed a bug with quote removal in strings where the final character is a 397 backslash. 398 399sss. Fixed a bug that caused the effects of special variables to persist even 400 when the variables were unset as part of the shell reinitializing itself 401 to execute a shell script. 402 403ttt. Fixed a bug that caused the history to not be saved after `history -c' or 404 `history -d' was executed until a sufficient number of commands had been 405 saved to the history. 406 407uuu. Bash now parses command substitutions according to Posix rules: parsing 408 the command contained in $() to find the closing delimiter. 409 410vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to 411 not persist. 412 413www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin 414 as Posix specifies. 415 416xxx. Invalid numeric arguments to shell builtins no longer cause the shell to 417 short-circuit any executing compound command. 418 419yyy. Fixed a bug that caused the exit status to be lost when `break' was 420 used to short-circuit a loop's execution. 421 422zzz. Fixed a bug that caused stray ^? characters to be left in expansions of 423 "${array[*]}". 424 425aaaa. Bash now prints better error messages for here documents terminated by 426 EOF and for identifying the incorrect token in an invalid arithmetic 427 expression. 428 429bbbb. Fixed a bug in the variable length word expansion that caused it to 430 incorrectly calculate the number of multibyte characters. 431 432cccc. Fixed a race condition that could result in the top-level shell setting 433 the terminal's process group to an incorrect value if the process 434 group was changed by a child of a child of the shell. 435 436dddd. Fixed a bug that caused here documents belonging to commands within a 437 compound command to be displayed in a syntactially-incorrect form, which 438 prevented them from being re-read as input. 439 440eeee. The shell displays more warnings about failures to set the locale. 441 442ffff. Fixed a bug that caused the body of a here-document to not be saved to 443 the history list. 444 445gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD 446 had /dev/fd available, resulting in problems with process substitution. 447 4482. Changes to Readline 449 450a. Fixed a number of redisplay errors in environments supporting multibyte 451 characters. 452 453b. Fixed bugs in vi command mode that caused motion commands to inappropriately 454 set the mark. 455 456c. When using the arrow keys in vi insertion mode, readline allows movement 457 beyond the current end of the line (unlike command mode). 458 459d. Fixed bugs that caused readline to loop when the terminal has been taken 460 away and reads return -1/EIO. 461 462e. Fixed bugs in redisplay occurring when displaying prompts containing 463 invisible characters. 464 465f. Fixed a bug that caused the completion append character to not be reset to 466 the default after an application-specified completion function changed it. 467 468g. Fixed a problem that caused incorrect positioning of the cursor while in 469 emacs editing mode when moving forward at the end of a line while using 470 a locale supporting multibyte characters. 471 472h. Fixed an off-by-one error that caused readline to drop every 511th 473 character of buffered input. 474 475i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up. 476 477j. Fixed redisplay bugs caused by multiline prompts with invisible characters 478 or no characters following the final newline. 479 480k. Fixed redisplay bug caused by prompts consisting solely of invisible 481 characters. 482 483l. Fixed a bug in the code that buffers characters received very quickly in 484 succession which caused characters to be dropped. 485 486m. Fixed a bug that caused readline to reference uninitialized data structures 487 if it received a SIGWINCH before completing initialzation. 488 489n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly 490 and therefore unrepeatable. 491 492o. Fixed a bug that caused readline to disable echoing when it was being used 493 with an output file descriptor that was not a terminal. 494 495p. Readline now blocks SIGINT while manipulating internal data structures 496 during redisplay. 497 498q. Fixed a bug in redisplay that caused readline to segfault when pasting a 499 very long line (over 130,000 characters). 500 501r. Fixed bugs in redisplay when using prompts with no visible printing 502 characters. 503 5043. New Features in Bash 505 506a. When using substring expansion on the positional parameters, a starting 507 index of 0 now causes $0 to be prefixed to the list. 508 509b. The `help' builtin now prints its columns with entries sorted vertically 510 rather than horizontally. 511 512c. There is a new variable, $BASHPID, which always returns the process id of 513 the current shell. 514 515d. There is a new `autocd' option that, when enabled, causes bash to attempt 516 to `cd' to a directory name that is supplied as the first word of a 517 simple command. 518 519e. There is a new `checkjobs' option that causes the shell to check for and 520 report any running or stopped jobs at exit. 521 522f. The programmable completion code exports a new COMP_TYPE variable, set to 523 a character describing the type of completion being attempted. 524 525g. The programmable completion code exports a new COMP_KEY variable, set to 526 the character that caused the completion to be invoked (e.g., TAB). 527 528h. If creation of a child process fails due to insufficient resources, bash 529 will try again several times before reporting failure. 530 531i. The programmable completion code now uses the same set of characters as 532 readline when breaking the command line into a list of words. 533 534j. The block multiplier for the ulimit -c and -f options is now 512 when in 535 Posix mode, as Posix specifies. 536 537k. Changed the behavior of the read builtin to save any partial input received 538 in the specified variable when the read builtin times out. This also 539 results in variables specified as arguments to read to be set to the empty 540 string when there is no input available. When the read builtin times out, 541 it returns an exit status greater than 128. 542 543l. The shell now has the notion of a `compatibility level', controlled by 544 new variables settable by `shopt'. Setting this variable currently 545 restores the bash-3.1 behavior when processing quoted strings on the rhs 546 of the `=~' operator to the `[[' command. 547 548m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number 549 of threads) options. 550 551n. The -p option to `declare' now displays all variable values and attributes 552 (or function values and attributes if used with -f). 553 554o. There is a new `compopt' builtin that allows completion functions to modify 555 completion options for existing completions or the completion currently 556 being executed. 557 558p. The `read' builtin has a new -i option which inserts text into the reply 559 buffer when using readline. 560 561q. A new `-E' option to the complete builtin allows control of the default 562 behavior for completion on an empty line. 563 564r. There is now limited support for completing command name words containing 565 globbing characters. 566 567s. Changed format of internal help documentation for all builtins to roughly 568 follow man page format. 569 570t. The `help' builtin now has a new -d option, to display a short description, 571 and a -m option, to print help information in a man page-like format. 572 573u. There is a new `mapfile' builtin to populate an array with lines from a 574 given file. 575 576v. If a command is not found, the shell attempts to execute a shell function 577 named `command_not_found_handle', supplying the command words as the 578 function arguments. 579 580w. There is a new shell option: `globstar'. When enabled, the globbing code 581 treats `**' specially -- it matches all directories (and files within 582 them, when appropriate) recursively. 583 584x. There is a new shell option: `dirspell'. When enabled, the filename 585 completion code performs spelling correction on directory names during 586 completion. 587 588y. The `-t' option to the `read' builtin now supports fractional timeout 589 values. 590 591z. Brace expansion now allows zero-padding of expanded numeric values and 592 will add the proper number of zeroes to make sure all values contain the 593 same number of digits. 594 595aa. There is a new bash-specific bindable readline function: `dabbrev-expand'. 596 It uses menu completion on a set of words taken from the history list. 597 598bb. The command assigned to a key sequence with `bind -x' now sets two new 599 variables in the environment of the executed command: READLINE_LINE_BUFFER 600 and READLINE_POINT. The command can change the current readline line 601 and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT, 602 respectively. 603 604cc. There is a new >>& redirection operator, which appends the standard output 605 and standard error to the named file. 606 607dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects 608 the standard error for a command through a pipe. 609 610ee. The new `;&' case statement action list terminator causes execution to 611 continue with the action associated with the next pattern in the 612 statement rather than terminating the command. 613 614ff. The new `;;&' case statement action list terminator causes the shell to 615 test the next set of patterns after completing execution of the current 616 action, rather than terminating the command. 617 618gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an 619 integer value greater than zero, prompt expansion of \w and \W will 620 retain only that number of trailing pathname components and replace 621 the intervening characters with `...'. 622 623hh. There are new case-modifying word expansions: uppercase (^[^]) and 624 lowercase (,[,]). They can work on either the first character or 625 array element, or globally. They accept an optional shell pattern 626 that determines which characters to modify. There is an optionally- 627 configured feature to include capitalization operators. 628 629ii. The shell provides associative array variables, with the appropriate 630 support to create, delete, assign values to, and expand them. 631 632jj. The `declare' builtin now has new -l (convert value to lowercase upon 633 assignment) and -u (convert value to uppercase upon assignment) options. 634 There is an optionally-configurable -c option to capitalize a value at 635 assignment. 636 637kk. There is a new `coproc' reserved word that specifies a coprocess: an 638 asynchronous command run with two pipes connected to the creating shell. 639 Coprocs can be named. The input and output file descriptors and the 640 PID of the coprocess are available to the calling shell in variables 641 with coproc-specific names. 642 6434. New Features in Readline 644 645a. A new variable, rl_sort_completion_matches; allows applications to inhibit 646 match list sorting (but beware: some things don't work right if 647 applications do this). 648 649b. A new variable, rl_completion_invoking_key; allows applications to discover 650 the key that invoked rl_complete or rl_menu_complete. 651 652c. The functions rl_block_sigint and rl_release_sigint are now public and 653 available to calling applications who want to protect critical sections 654 (like redisplay). 655 656d. The functions rl_save_state and rl_restore_state are now public and 657 available to calling applications; documented rest of readline's state 658 flag values. 659 660e. A new user-settable variable, `history-size', allows setting the maximum 661 number of entries in the history list. 662 663f. There is a new implementation of menu completion, with several improvements 664 over the old; the most notable improvement is a better `completions 665 browsing' mode. 666 667g. The menu completion code now uses the rl_menu_completion_entry_function 668 variable, allowing applications to provide their own menu completion 669 generators. 670 671h. There is support for replacing a prefix of a pathname with a `...' when 672 displaying possible completions. This is controllable by setting the 673 `completion-prefix-display-length' variable. Matches with a common prefix 674 longer than this value have the common prefix replaced with `...'. 675 676i. There is a new `revert-all-at-newline' variable. If enabled, readline will 677 undo all outstanding changes to all history lines when `accept-line' is 678 executed. 679 680------------------------------------------------------------------------------ 681This document details the changes between this version, bash-3.2-release, 682and the previous version, bash-3.2-beta. 683 6841. Changes to Bash 685 686a. Fixed a bug that caused the temporary environment passed to a command to 687 affect the shell's environment under certain circumstances. 688 689b. Fixed a bug in the printf builtin that caused the %q format specifier to 690 ignore empty string arguments. 691 692c. Improved multibyte character environment detection at configuration time. 693 694d. Fixed a bug in the read builtin that left spurious escape characters in the 695 input after processing backslashes when assigning to an array variable. 696 6972. Changes to Readline 698 699a. Fixed a redisplay bug that occurred in multibyte-capable locales when the 700 prompt was one character longer than the screen width. 701------------------------------------------------------------------------------ 702This document details the changes between this version, bash-3.2-beta, 703and the previous version, bash-3.2-alpha. 704 7051. Changes to Bash 706 707a. Changed the lexical analyzer to treat locale-specific blank characters as 708 white space. 709 710b. Fixed a bug in command printing to avoid confusion between redirections and 711 process substitution. 712 713c. Fixed problems with cross-compiling originating from inherited environment 714 variables. 715 716d. Added write error reporting to printf builtin. 717 718e. Fixed a bug in the variable expansion code that could cause a core dump in 719 a multi-byte locale. 720 721f. Fixed a bug that caused substring expansion of a null string to return 722 incorrect results. 723 724g. BASH_COMMAND now retains its previous value while executing commands as the 725 result of a trap, as the documentation states. 726 7272. Changes to Readline 728 729a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing 730 the prompt and input line multiple times. 731 732b. Fixed history expansion to not be confused by here-string redirection. 733 734c. Readline no longer treats read errors by converting them to newlines, as 735 it does with EOF. This caused partial lines to be returned from readline(). 736 737------------------------------------------------------------------------------ 738This document details the changes between this version, bash-3.2-alpha, 739and the previous version, bash-3.1-release. 740 7411. Changes to Bash 742 743a. Fixed a source bug that caused the minimal configuration to not compile. 744 745b. Fixed memory leaks in error handling for the `read' builtin. 746 747c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit 748 status. 749 750d. Fixed some parsing problems with compound array assignments. 751 752e. Added additional configuration changes for: NetBSD (incomplete multibyte 753 character support) 754 755f. Fixed two bugs with local array variable creation when shadowing a variable 756 of the same name from a previous context. 757 758g. Fixed the `read' builtin to restore the correct set of completion functions 759 if a timeout occurs. 760 761h. Added code to defer the initialization of HISTSIZE (and its stifling of the 762 history list) until the history file is loaded, allowing a startup file to 763 override the default value. 764 765i. Tightened up the arithmetic expression parsing to produce better error 766 messages when presented with invalid operators. 767 768j. Fixed the cross-compilation support to build the signal list at shell 769 invocation rather than compile time if cross-compiling. 770 771k. Fixed multibyte support for non-gcc compilers (or compilers that do not 772 allow automatic array variable sizing based on a non-constant value). 773 774l. Several fixes to the code that manages the list of terminated jobs and 775 their exit statuses, and the list of active and recently-terminated jobs 776 to avoid pid aliasing/wraparound and allocation errors. 777 778m. Fixed a problem that allowed scripts to die due to SIGINT while waiting 779 for children, even when started in the background or otherwise ignoring 780 SIGINT. 781 782n. Fixed a bug that caused shells invoked as -/bin/bash from not being 783 recognized as login shells. 784 785o. Fixed a problem that caused shells in the background to give the terminal 786 to a process group other than the foreground shell process group. 787 788p. Fixed a problem with extracting the `varname' in ${#varname}. 789 790q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby 791 calling functions that may not be called in a signal handler context -- 792 but set a flag and exit afterward (like SIGINT). 793 794r. Changed the brace expansion code to skip over braces that don't begin a 795 valid matched brace expansion construct. 796 797s. Fixed `typeset' and `declare' to not require that their shell function 798 operands to be valid shell identifiers. 799 800t. Changed `test' to use access(2) with a temporary uid/euid swap when testing 801 file attributes and running setuid, and access(2) in most other cases. 802 803u. Changed completion code to not attempt command name completion on a line 804 consisting solely of whitespace when no_empty_command_completion is set. 805 806v. The `hash' builtin now prints nothing in posix mode when the hash table is 807 empty, and prints a message to that effect to stdout instead of stderr 808 when not in posix mode. 809 810w. Fixed a bug in the extended pattern matching code that caused it to fail to 811 match periods with certain patterns. 812 813x. Fixed a bug that caused the shell to dump core when performing filename 814 generation in directories with thousands of files. 815 816y. Returned to the original Bourne shell rules for parsing ``: no recursive 817 parsing of embedded quoted strings or ${...} constructs. 818 819z. The inheritence of the DEBUG, RETURN, and ERR traps is now dependent only 820 on the settings of the `functrace' and `errtrace' shell options, rather 821 than whether or not the shell is in debugging mode. 822 823aa. Fixed a problem with $HOME being converted to ~ in the expansion of 824 members of the DIRSTACK array. 825 826bb. Fixed a problem with quoted arguments to arithmetic expansions in certain 827 constructs. 828 829cc. The command word completion code now no longer returns matching directories 830 while searching $PATH. 831 832dd. Fixed a bug with zero-padding and precision handling in snprintf() 833 replacement. 834 835ee. Fixed a bug that caused the command substitution code not to take embedded 836 shell comments into account. 837 838ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an 839 arithmetic substitution. 840 841gg. Fixed a bug in the prompt expansion code that inappropriately added a 842 \001 before a \002 under certain circumstances. 843 844hh. Fixed a bug that caused `unset LANG' to not properly reset the locale 845 (previous versions would set the locale back to what it was when bash 846 was started rather than the system's "native" locale). 847 848ii. Fixed a bug that could cause file descriptors > 10 to not be closed even 849 when closed explicitly by a script. 850 851jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting 852 inside double-quoted command substitutions. 853 854kk. Fixed a bug that could cause core dumps when `return' was executed as the 855 last element of a pipeline inside a shell function. 856 857ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in 858 the jobs list. 859 8602. Changes to Readline 861 862a. Fixed a problem that caused segmentation faults when using readline in 863 callback mode and typing consecutive DEL characters on an empty line. 864 865b. Fixed several redisplay problems with multibyte characters, all having to 866 do with the different code paths and variable meanings between single-byte 867 and multibyte character redisplay. 868 869c. Fixed a problem with key sequence translation when presented with the 870 sequence \M-\C-x. 871 872d. Fixed a problem that prevented the `a' command in vi mode from being 873 undone and redone properly. 874 875e. Fixed a problem that prevented empty inserts in vi mode from being undone 876 properly. 877 878f. Fixed a problem that caused readline to initialize with an incorrect idea 879 of whether or not the terminal can autowrap. 880 881g. Fixed output of key bindings (like bash `bind -p') to honor the setting of 882 convert-meta and use \e where appropriate. 883 884h. Changed the default filename completion function to call the filename 885 dequoting function if the directory completion hook isn't set. This means 886 that any directory completion hooks need to dequote the directory name, 887 since application-specific hooks need to know how the word was quoted, 888 even if no other changes are made. 889 890i. Fixed a bug with creating the prompt for a non-interactive search string 891 when there are non-printing characters in the primary prompt. 892 893j. Fixed a bug that caused prompts with invisible characters to be redrawn 894 multiple times in a multibyte locale. 895 896k. Fixed a bug that could cause the key sequence scanning code to return the 897 wrong function. 898 899l. Fixed a problem with the callback interface that caused it to fail when 900 using multi-character keyboard macros. 901 902m. Fixed a bug that could cause a core dump when an edited history entry was 903 re-executed under certain conditions. 904 905n. Fixed a bug that caused readline to reference freed memory when attmpting 906 to display a portion of the prompt. 907 9083. New Features in Bash 909 910a. Changed the parameter pattern replacement functions to not anchor the 911 pattern at the beginning of the string if doing global replacement - that 912 combination doesn't make any sense. 913 914b. When running in `word expansion only' mode (--wordexp option), inhibit 915 process substitution. 916 917c. Loadable builtins now work on MacOS X 10.[34]. 918 919d. Shells running in posix mode no longer set $HOME, as POSIX requires. 920 921e. The code that checks for binary files being executed as shell scripts now 922 checks only for NUL rather than any non-printing character. 923 924f. Quoting the string argument to the [[ command's =~ operator now forces 925 string matching, as with the other pattern-matching operators. 926 9274. New Features in Readline 928 929a. Calling applications can now set the keyboard timeout to 0, allowing 930 poll-like behavior. 931 932b. The value of SYS_INPUTRC (configurable at compilation time) is now used as 933 the default last-ditch startup file. 934 935c. The history file reading functions now allow windows-like \r\n line 936 terminators. 937 938------------------------------------------------------------------------------ 939This document details the changes between this version, bash-3.1-release, 940and the previous version, bash-3.1-rc2. 941 9421. Changes to Readline 943 944a. Several changes to the multibyte redisplay code to fix problems with 945 prompts containing invisible characters. 946 947------------------------------------------------------------------------------ 948This document details the changes between this version, bash-3.1-rc2, 949and the previous version, bash-3.1-rc1. 950 9511. Changes to Bash 952 953a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's 954 eventually attached to a background job. 955 956b. Changed some code so that filenames with leading tildes with spaces in the 957 name aren't tilde-expanded by the bash completion code. 958 959c. Fixed a bug that caused the pushd builtin to fail to change to 960 directories with leading `-'. 961 962d. Fixed a small memory leak in the programmable completion code. 963 9642. Changes to Readline 965 966a. Fixed a redisplay bug caused by moving the cursor vertically to a line 967 with invisible characters in the prompt in a multibyte locale. 968 969b. Fixed a bug that could cause the terminal special chars to be bound in the 970 wrong keymap in vi mode. 971 9723. New Features in Bash 973 974a. If compiled for strict POSIX conformance, LINES and COLUMNS may now 975 override the true terminal size. 976 9774. New Features in Readline 978 979a. A new external application-controllable variable that allows the LINES 980 and COLUMNS environment variables to set the window size regardless of 981 what the kernel returns. 982 983------------------------------------------------------------------------------ 984This document details the changes between this version, bash-3.1-rc1, 985and the previous version, bash-3.1-beta1. 986 9871. Changes to Bash 988 989a. Fixed a bug that could cause core dumps due to accessing the current 990 pipeline while in the middle of modifying it. 991 992b. Fixed a bug that caused pathnames with backslashes still quoting characters 993 to be passed to opendir(). 994 995c. Command word completion now obeys the setting of completion-ignore-case. 996 997d. Fixed a problem with redirection that caused file descriptors greater than 998 2 to be inappropriately marked as close-on-exec. 999 1000e. In Posix mode, after `wait' is called to wait for a particular process 1001 explicitly, that process is removed from the list of processes known to 1002 the shell, and subsequent attempts to wait for it return errors. 1003 1004f. Fixed a bug that caused extended pattern matching to incorrectly scan 1005 backslash-escaped pattern characters. 1006 1007g. Fixed a synchronization problem that could cause core dumps when handling 1008 a SIGWINCH. 1009 1010h. Fixed a bug that caused an unmatched backquote to be accepted without an 1011 error when processing here documents. 1012 1013i. Fixed a small memory leak in the `cd' builtin. 1014 1015j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and 1016 OSTYPE variables at build time, to support universal binaries. 1017 1018k. Fixed a bug that could cause an exit trap to return the exit status of 1019 the trap command rather than the status as it was before the trap was 1020 run as the shell's exit status. 1021 10222. New Features in Bash 1023 10243. Changes to Readline 1025 1026a. Fixed a bug that caused reversing the incremental search direction to 1027 not work correctly. 1028 1029b. Fixed the vi-mode `U' command to only undo up to the first time insert mode 1030 was entered, as Posix specifies. 1031 1032c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong 1033 place. 1034 10354. New Features in Readline 1036 1037a. New application-callable auxiliary function, rl_variable_value, returns 1038 a string corresponding to a readline variable's value. 1039 1040b. When parsing inputrc files and variable binding commands, the parser 1041 strips trailing whitespace from values assigned to boolean variables 1042 before checking them. 1043 1044 1045------------------------------------------------------------------------------ 1046This document details the changes between this version, bash-3.1-beta1, 1047and the previous version, bash-3.1-alpha1. 1048 10491. Changes to Bash 1050 1051a. Added some system-specific signal names. 1052 1053b. Fixed a typo in the ulimit builtin to make `x' the right option to 1054 maniuplate the limit on file locks. 1055 1056c. Fixed a problem with using += to append to index 0 of an array variable 1057 when not using subscript syntax. 1058 1059d. A few changes to configure.in to remove calls to obsolete or outdated 1060 macros. 1061 1062e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are 1063 made when the variable is set in the temporary environment to a command. 1064 1065f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are 1066 made when the variable is modified using `printf -v'. 1067 1068g. The export environment is now remade on cygwin when HOME is changed, so 1069 DLLs bash is linked against pick up the new value. This fixes problems 1070 with tilde expansion when linking against and already-installed readline. 1071 1072h. Small fix to the logic for performing tilde expansion in posix mode, so 1073 expansion on the right-hand side of an assignment statement takes place. 1074 1075i. Fixed a bug that prevented redirections associated with a shell function 1076 from being executed when in a subshell. 1077 1078j. Fixed `source' and `.' builtins to not require an executable file when 1079 searching $PATH for a file to source. 1080 1081k. Fixed a bug that caused incorrect word splitting in a function when IFS 1082 was declared local, then unset. 1083 1084l. Fixed a problem with the `kill' builtin that prevented sending signals 1085 to a process group under certain circumstances when providing a pid < 0. 1086 1087m. When in POSIX mode, `pwd' now checks that the value it prints is the same 1088 directory as `.', even when displaying $PWD. 1089 1090n. Fixed a problem with the `read' builtin when reading a script from standard 1091 input and reading data from the same file. 1092 1093o. Fixed a problem with the `type' and `command' builtins that caused absolute 1094 pathnames to be displayed incorrectly. 1095 1096p. Some changes to the `bg' builtin for POSIX conformance. 1097 1098q. The `fc' builtin now removes the `fc' command that caused it to invoke an 1099 editor on specified history entries from the history entirely, rather than 1100 simply ignoring it. 1101 1102r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi 1103 on the current command, rather than checking $FCEDIT and $EDITOR. 1104 1105s. Fixed a small memory leak in the pathname canonicalization code. 1106 1107t. Fixed a bug that caused the expanded value of a $'...' string to be 1108 incorrectly re-quoted if it occurred within a double-quoted ${...} 1109 parameter expansion. 1110 1111u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history. 1112 1113v. Fixed a bug that caused core dumps when interrupting loops running builtins 1114 on some systems. 1115 1116w. Make sure that some of the functions bash provides replacements for are 1117 not cpp defines. 1118 1119x. The code that scans embedded commands for the parser (`...` and $(...)) is 1120 now more aware of embedded comments and their effect on quoted strings. 1121 1122y. Changed the `-n' option to the `history' builtin to not reset the number of 1123 history lines read in the current session after reading the new lines from 1124 the history file if the history is being appended when it is written to 1125 the file, since the appending takes care of the problem that the adjustment 1126 was intended to solve. 1127 1128z. Improved the error message displayed when a shell script fails to execute 1129 because the environment and size of command line arguments are too large. 1130 1131aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is 1132 saving commands to the history list, not just when HISTSIZE is defined. 1133 11342. Changes to Readline 1135 1136a. The `change-case' command now correctly changes the case of multibyte 1137 characters. 1138 1139b. Changes to the shared library construction scripts to deal with Windows 1140 DLL naming conventions for Cygwin. 1141 1142c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed 1143 SIGWINCH. 1144 1145d. Fixed the non-incremental search code in vi mode to dispose of any current 1146 undo list when copying a line from the history into the current editing 1147 buffer. 1148 1149e. The variable assignment code now ignores whitespace at the end of lines 1150 when assigning to boolean variables. 1151 1152f. The `C-w' binding in incremental search now understands multibyte 1153 characters. 1154 11553. New Features in Bash 1156 1157a. A new configuration option, `--enable-strict-posix-default', which will 1158 build bash to be POSIX conforming by default. 1159 11604. New Features in Readline 1161 1162a. If the rl_completion_query_items is set to a value < 0, readline never 1163 asks the user whether or not to view the possible completions. 1164 1165------------------------------------------------------------------------------ 1166This document details the changes between this version, bash-3.1-alpha1, 1167and the previous version, bash-3.0-release. 1168 11691. Changes to Bash 1170 1171a. Fixed a bug that caused bash to crash if referencing an unset local array. 1172 1173b. Fixed a problem that caused tilde expansion to not be performed before 1174 attempting globbing word completion. 1175 1176c. Fixed an incompatibility so that a first argument to trap that's a valid 1177 signal number will be trated as a signal rather than a command to execute. 1178 1179d. Fixed ${#word} expansion to correctly compute the length of a string 1180 containing multibyte characters. 1181 1182e. Fixed a bug that caused bash to not pass the correct flags for signal 1183 disposition to child processes. 1184 1185f. Fixed a bug that caused `fc -l' to list one too many history entries. 1186 1187g. Some fixes to `fc' for POSIX conformance. 1188 1189h. Some fixes to job status display for POSIX conformance. 1190 1191i. Fixed a bug that caused `command -v' to display output if a command was not 1192 found -- it should be silent. 1193 1194j. In POSIX mode, `type' and `command -[vV]' do not report non-executable 1195 files, even if the shell will attempt to execute them. 1196 1197k. Fixed a bug that caused the `==' operator to the [[ command to not attempt 1198 extended pattern matching. 1199 1200l. Fixed the brace expansion code to handle characters whose value exceeds 128. 1201 1202m. Fixed `printf' to handle strings with a leading `\0' whose length is 1203 non-zero. 1204 1205n. Fixed a couple of problems with brace expansion where `${' was handled 1206 incorrectly. 1207 1208o. Fixed off-by-one error when calculating the upper bound of `offset' when 1209 processing the ${array[@]:offset:length} expansion. 1210 1211p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X 1212 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x, 1213 Cygwin 1214 1215q. Fixed a bug that caused the shell to ignore the status of the rightmost 1216 command in a pipeline when the `pipefail' option was enabled. 1217 1218r. Fixed a completion bug that caused core dumps when expanding a directory 1219 name. 1220 1221s. Fixed a bug that prevented `hash -d' from removing commands from the hash 1222 table. 1223 1224t. Fixed word splitting to avoid really bad quadratic performance when 1225 expanding long lists. 1226 1227u. Fixed a bug that caused negative offsets in substring expansion to use the 1228 wrong values. 1229 1230v. Fixed a bug in printf that caused it to not return failure on write errors. 1231 1232w. Fixed a bug that caused commands in subshells to not be properly timed. 1233 1234x. The shell parser no longer attempts to parse a compound assignment specially 1235 unless in a position where an assignment statement is acceptable or parsing 1236 arguments to a builtin that accepts assignment statements. 1237 1238y. Fixed a problem that caused a `case' statement to be added to the history 1239 incorrectly as a single command if the `case word' was on one line and the 1240 `in' on another. 1241 1242z. Fixed a problem that caused internal shell quoting characters to be 1243 incorrectly quoted with backslashes under some circumstances. 1244 1245aa. The shell now performs correct word splitting when IFS contains multibyte 1246 characters. 1247 1248bb. The mail checking code now resets the cached file information if the size 1249 drops to 0, even if the times don't change. 1250 1251cc. A completed command name that is found in $PATH as well as the name of a 1252 directory in the current directory no longer has a slash appended in certain 1253 circumstances: a single instance found in $PATH when `.' is not in $PATH, 1254 and multiple instances found in $PATH, even when `.' is in $PATH. 1255 1256dd. Incorporated tilde expansion into the word expansion code rather than as a 1257 separately-called function, fixing some cases where it was performed 1258 inappropriately (e.g., after the second `=' in an assignment statement or 1259 in a double-quoted parameter expansion). 1260 1261ee. Fixed several bugs encountered when parsing compound assignment statements, 1262 so that compound assignments appearing as arguments to builtins are no 1263 longer double-expanded. 1264 1265ff. Fixed a bug in the command execution code that caused asynchronous commands 1266 containing command substitutions to not put the terminal in the wrong 1267 process group. 1268 1269gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to 1270 return -1/EINVAL at runtime as well as configuration time. 1271 1272hh. Fixed parser to generate an error when the pipeline `argument' to `!' or 1273 `time' is NULL. 1274 1275ii. The shell now takes a little more care when manipulating file descriptors 1276 greater than 9 with the `exec' builtin. 1277 1278jj. Fixed a bug that caused variable assignments preceding the `command' builtin 1279 preceding a special builtin to be preserved after the command completed in 1280 POSIX mode. 1281 1282kk. Fixed a bug that allowed variables beginning with a digit to be created. 1283 1284ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...' 1285 construct. 1286 1287mm. A shell whose name begins with `-' will now be a restricted shell if the 1288 remainder of the name indicates it should be restricted. 1289 1290nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset 1291 during a function's execution. 1292 1293oo. Fixed a bug that caused executing a `return' in a function to not execute 1294 a RETURN trap. The RETURN trap is inherited by shell functions only if 1295 function tracing is globally enabled or has been enabled for that function. 1296 1297pp. Fixed cases where var[@] was not handled exactly like var, when var is a 1298 scalar variable. 1299 1300qq. Fixed a bug that caused the first character after a SIGINT to be discarded 1301 under certain circumstances. 1302 1303rr. Fixed exit status code so that a suspended job returns 128+signal as its 1304 exit status (preventing commands after it in `&&' lists from being 1305 executed). 1306 1307ss. Fixed a bug that caused the shell parser state to be changed by executing 1308 a shell function as a result of word completion. 1309 1310tt. Fixed a long-standing bug that caused '\177' characters in variable 1311 values to be discarded when expanded in double-quoted strings. 1312 1313uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a 1314 subshell environment. 1315 1316vv. Extensive changes to the job management code to avoid the pid-reuse and 1317 pid-aliasing problems caused by retaining the exit status of too many jobs, 1318 but still retain as many background job statuses as POSIX requires. 1319 1320ww. Fixed a parser bug in processing \<newline> that caused things like 1321 1322 ((echo 5) \ 1323 (echo 6)) 1324 1325 to not work correctly. 1326 1327xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links 1328 when in posix mode, as POSIX requires. 1329 1330yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic 1331 links if a directory is chosen from $CDPATH. 1332 1333zz. The word splitting code now treats an IFS character that is not space, 1334 tab, or newline and any adjacent IFS white space as a single delimiter, as 1335 SUSv3/XPG6 require. 1336 1337aaa. The `read' builtin now checks whether or not the number of fields read is 1338 exactly the same as the number of variables instead of just assigning the 1339 rest of the line (minus any trailing IFS white space) to the last 1340 variable. This is what POSIX/SUS/XPG all require. 1341 1342bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a 1343 pipe, even when reading from another file descriptor. 1344 1345ccc. Fixed a bug that caused short-circuiting of execution even if the return 1346 value was being inverted. 1347 1348ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if 1349 PWD was unset. 1350 1351eee. Fixed a bug in `read' that counted internal quoting characters for the 1352 purposes of `read -n'. 1353 1354fff. Fixed a bug so that a function definition in a pipeline causes a child 1355 process to be forked at the right time. 1356 1357ggg. Bash will not attempt to link against a readline library that doesn't 1358 have rl_gnu_readline_p == 1. 1359 1360hhh. Fixed a bug that caused `read' to consume one too many characters when 1361 reading a fixed number of characters and the Nth character is a backslash. 1362 1363iii. Fixed a bug that caused `unset' on variables in the temporary environment 1364 to leave them set when `unset' completed. 1365 1366jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the 1367 shell didn't exit. 1368 1369kkk. The completion code is more careful to not turn `/' or `///' into `//', 1370 for those systems on which `//' has special meaning. 1371 1372lll. Fixed a bug that caused command substitution in asynchronous commands to 1373 close the wrong file descriptors. 1374 1375mmm. The shell no longer prints status messages about terminated background 1376 processes unless job control is active. 1377 1378nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s' 1379 from adding all the commands to the history list. 1380 1381ooo. Added a couple of changes to make arithmetic expansion more consistent in 1382 all its contexts (still not perfect). 1383 1384ppp. Fixed a bug that caused the parser to occasionally not find the right 1385 terminating "`" in an old-style command substitution. 1386 1387qqq. Fixed a bug that caused core dumps when the shell was reading its non- 1388 interactive input from fd 0 and fd 0 was duplicated and restored using a 1389 combination of `exec' (to save) and redirection (to restore). 1390 1391rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned 1392 up properly when a `return' is executed. 1393 1394sss. Change internal command substitution completion function to append a slash 1395 to directory names in the command. 1396 13972. Changes to Readline 1398 1399a. Fixed a bug that caused multiliine prompts to be wrapped and displayed 1400 incorrectly. 1401 1402b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current 1403 line correctly. 1404 1405c. Fixed a problem in computing the number of invisible characters on the first 1406 line of a prompt whose length exceeds the screen width. 1407 1408d. Fixed vi-mode searching so that failure preserves the current line rather 1409 than the last line in the history list. 1410 1411e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at 1412 end-of-line when manipulating multibyte characters. 1413 1414f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at 1415 end-of-line when manipulating multibyte characters. 1416 1417g. Fixed multiple bugs in the redisplay of multibyte characters: displaying 1418 prompts longer than the screen width containing multibyte characters, 1419 1420h. Fix the calculation of the number of physical characters in the prompt 1421 string when it contains multibyte characters. 1422 1423i. A non-zero value for the `rl_complete_suppress_append' variable now causes 1424 no `/' to be appended to a directory name. 1425 1426j. Fixed forward-word and backward-word to work when words contained 1427 multibyte characters. 1428 1429k. Fixed a bug in finding the delimiter of a `?' substring when performing 1430 history expansion in a locale that supports multibyte characters. 1431 1432l. Fixed a memory leak caused by not freeing the timestamp in a history entry. 1433 1434m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting 1435 of the `convert-meta' variable. 1436 1437n. Fixed saving and restoring primary prompt when prompting for incremental 1438 and non-incremental searches; search prompts now display multibyte 1439 characters correctly. 1440 1441o. Fixed a bug that caused keys originally bound to self-insert but shadowed 1442 by a multi-character key sequence to not be inserted. 1443 1444p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't 1445 dereferenced if NULL (matching the documentation). 1446 1447q. Extensive changes to readline to add enough state so that commands 1448 requiring additional characters (searches, multi-key sequences, numeric 1449 arguments, commands requiring an additional specifier character like 1450 vi-mode change-char, etc.) work without synchronously waiting for 1451 additional input. 1452 1453r. Lots of changes so readline builds and runs on MinGW. 1454 1455s. Readline no longer tries to modify the terminal settings when running in 1456 callback mode. 1457 1458t. The Readline display code no longer sets the location of the last invisible 1459 character in the prompt if the \[\] sequence is empty. 1460 14613. New Features in Bash 1462 1463a. Bash now understands LC_TIME as a special variable so that time display 1464 tracks the current locale. 1465 1466b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created 1467 as `invisible' variables and may not be unset. 1468 1469c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't 1470 try to interpret any options at all, as POSIX requires. 1471 1472d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify. 1473 1474e. Fixed vi-mode word completion and glob expansion to perform tilde 1475 expansion. 1476 1477f. The `**' mathematic exponentiation operator is now right-associative. 1478 1479g. The `ulimit' builtin has new options: -i (max number of pending signals), 1480 -q (max size of POSIX message queues), and -x (max number of file locks). 1481 1482h. A bare `%' once again expands to the current job when used as a job 1483 specifier. 1484 1485i. The `+=' assignment operator (append to the value of a string or array) is 1486 now supported for assignment statements and arguments to builtin commands 1487 that accept assignment statements. 1488 1489j. BASH_COMMAND now preserves its value when a DEBUG trap is executed. 1490 1491k. The `gnu_errfmt' option is enabled automatically if the shell is running 1492 in an emacs terminal window. 1493 1494l. New configuration option: --single-help-strings. Causes long help text 1495 to be written as a single string; intended to ease translation. 1496 1497m. The COMP_WORDBREAKS variable now causes the list of word break characters 1498 to be emptied when the variable is unset. 1499 1500n. An unquoted expansion of $* when $IFS is empty now causes the positional 1501 parameters to be concatenated if the expansion doesn't undergo word 1502 splitting. 1503 1504o. Bash now inherits $_ from the environment if it appears there at startup. 1505 1506p. New shell option: nocasematch. If non-zero, shell pattern matching ignores 1507 case when used by `case' and `[[' commands. 1508 1509q. The `printf' builtin takes a new option: -v var. That causes the output 1510 to be placed into var instead of on stdout. 1511 1512r. By default, the shell no longer reports processes dying from SIGPIPE. 1513 1514s. Bash now sets the extern variable `environ' to the export environment it 1515 creates, so C library functions that call getenv() (and can't use the 1516 shell-provided replacement) get current values of environment variables. 1517 15184. New Features in Readline 1519 1520a. The key sequence sent by the keypad `delete' key is now automatically 1521 bound to delete-char. 1522 1523b. A negative argument to menu-complete now cycles backward through the 1524 completion list. 1525 1526c. A new bindable readline variable: bind-tty-special-chars. If non-zero, 1527 readline will bind the terminal special characters to their readline 1528 equivalents when it's called (on by default). 1529 1530d. New bindable command: vi-rubout. Saves deleted text for possible 1531 reinsertion, as with any vi-mode `text modification' command; `X' is bound 1532 to this in vi command mode. 1533 1534------------------------------------------------------------------------------ 1535This document details the changes between this version, bash-3.0-release, 1536and the previous version, bash-3.0-rc1. 1537 15381. Changes to Bash 1539 1540a. Fixed a boundary overrun that could cause segmentation faults when the 1541 completion code hands an incomplete construct to the word expansion 1542 functions. 1543 1544b. Changed posix mode behavior so that an error in a variable assignment 1545 preceding a special builtin causes a non-interactive shell to exit. 1546 1547c. Change the directory expansion portion of the completion code to not 1548 expand embedded command substitutions if the directory name appears in 1549 the file system. 1550 1551d. Fixed a problem that caused `bash -r' to turn on restrictions before 1552 reading the startup files. 1553 1554e. Fixed a problem with the default operation of the `umask' builtin. 1555 15562. Changes to Readline 1557 1558a. Fixed a problem with readline saving the contents of the current line 1559 before beginning a non-interactive search. 1560 1561b. Fixed a problem with EOF detection when using rl_event_hook. 1562 1563c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric 1564 arguments. 1565 1566------------------------------------------------------------------------------ 1567This document details the changes between this version, bash-3.0-rc1, 1568and the previous version, bash-3.0-beta1. 1569 15701. Changes to Bash 1571 1572a. Fixed a bug that caused incorrect behavior when referecing element 0 of 1573 an array using $array, element 0 was unset, and `set -u' was enabled. 1574 1575b. System-specific changes for: SCO Unix 3.2, Tandem. 1576 1577c. Fixed a bug that caused inappropriate word splitting when a variable was 1578 expanded within a double-quoted string that also included $@. 1579 1580d. Fixed a bug that caused `pwd' to not display anything in physical mode 1581 when the file system had changed underneath the shell. 1582 1583e. Fixed a bug in the pre- and post- increment and decrement parsing in the 1584 expression evaluator that caused errors when the operands and corresponding 1585 operators were separated by whitespace. 1586 1587f. Fixed a bug that caused `history -p' to add an entry to the history list, 1588 counter to the documentation. (Keeps the history expansions invoked by 1589 emacs-mode command line editing from doing that as well.) 1590 1591g. Fixed a bug that could cause a core dump if `cd' is asked to print out a 1592 pathname longer than PATH_MAX characters. 1593 1594h. Fixed a bug that caused jobs to be put into the wrong process group under 1595 some circumstances after enabling job control with `set -m'. 1596 1597i. `unalias' now returns failure if no alias name arguments are supplied. 1598 1599j. Documented the characters not allowed to appear in an alias name. 1600 1601k. $* is no longer expanded as if in double quotes when it appears in the 1602 body of a here document, as the SUS seems to require. 1603 1604l. The `bashbug' script now uses a directory in $TMPDIR for exclusive 1605 access rather than trying to guess how the underlying OS provides for 1606 secure temporary file creation. 1607 1608m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames 1609 longer than PATH_MAX characters. 1610 1611n. Fixed a memory leak caused when creating multiple local array variables 1612 with identical names. 1613 1614o. Fixed a problem with calls to getcwd() so that bash now operates better 1615 when the full pathname to the current directory is longer than PATH_MAX 1616 bytes. 1617 1618p. The `trap' builtin now reports an error if a single non-signal argument 1619 is specified. 1620 1621q. Fixed a bug that caused `umask' to not work correctly when presented 1622 with a mask of all 0s. 1623 1624r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX 1625 appears to specify. 1626 1627s. Interactive mode now depends on whether or not stdin and stderr are 1628 connected to a tty; formerly it was stdin and stdout. POSIX requires 1629 this. 1630 1631t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the 1632 right kind of filename generation). 1633 16342. Changes to Readline 1635 1636a. Fixed a problem that could cause readline to refer to freed memory when 1637 moving between history lines while doing searches. 1638 1639b. Improvements to the code that expands and displays prompt strings 1640 containing multibyte characters. 1641 1642c. Fixed a problem with vi-mode not correctly remembering the numeric argument 1643 to the last `c'hange command for later use with `.'. 1644 1645d. Fixed a bug in vi-mode that caused multi-digit count arguments to work 1646 incorrectly. 1647 1648e. Fixed a problem in vi-mode that caused the last text modification command 1649 to not be remembered across different command lines. 1650 1651f. Fixed problems with changing characters and changing case at the end of 1652 the line. 1653 16543. New Features in Bash 1655 1656a. The `jobs', `kill', and `wait' builtins now accept job control notation 1657 even if job control is not enabled. 1658 1659b. The historical behavior of `trap' that allows a missing `action' argument 1660 to cause each specified signal's handling to be reset to its default is 1661 now only supported when `trap' is given a single non-option argument. 1662 16634. New Features in Readline 1664 1665a. When listing completions, directories have a `/' appended if the 1666 `mark-directories' option has been enabled. 1667 1668------------------------------------------------------------------------------ 1669This document details the changes between this version, bash-3.0-beta1, 1670and the previous version, bash-3.0-alpha. 1671 16721. Changes to Bash 1673 1674a. Fixes to build correctly when arrays are not compiled into the shell. 1675 1676b. Fixed command substitution to run any exit trap defined in the command 1677 substitution before returning; the exit trap is not inherited from the 1678 calling shell. 1679 1680c. Fixes to process group synchronization code so that every child process 1681 attempts to set the terminal's process group; fixes some synchronization 1682 problems on Linux kernels that schedule the child to always run before 1683 the parent. 1684 1685d. Fixed processing of octal and hex constants in printf builtin for POSIX.2 1686 compliance. 1687 1688e. Fixed a couple of core dumps in the pattern removal code. 1689 1690f. Fixes to the array subrange extraction code to deal better with sparse 1691 arrays. 1692 1693g. Parser errors and other errors that result in the shell exiting now cause 1694 the exit trap to be run. 1695 1696h. Change the command substitution completion functions to not append any 1697 closing quote, because it would be inserted a closing "`" or ")". 1698 1699i. Fix history initialization so assignments to $histchars made in startup 1700 files are honored. 1701 1702j. If an exit trap does not contain a call to `exit', the shell now uses 1703 the exit status of the last command executed before the trap as the exit 1704 status of the shell. 1705 1706k. The parser now prompts with $PS2 if it reads a newline while parsing a 1707 compound array assignment statement. 1708 1709l. When performing a compound array assignment, the parser doesn't treat 1710 words of the form [index]=value as assignments if they're the result of 1711 expansions. 1712 1713m. Fixed a bug that caused `return' executed in a trap command to make the 1714 shell think it was still running the trap. 1715 1716n. Fixed the value of errno set by the pathname canonicalization functions. 1717 1718o. Changed the grammar so that `time' alone on a line times a null command 1719 rather than being a syntax error. 1720 1721p. The pattern substitution code no longer performs quote removal on the 1722 pattern before trying to match it, as the pattern removal functions do. 1723 1724q. Fixed a bug that could cause core dumps when checking whether a quoted 1725 command name was being completed. 1726 1727r. Fixes to the pattern removal and pattern replacement expansions to deal 1728 with multibyte characters better (and faster). 1729 1730s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly 1731 multibyte) characters instead of raw bytes. 1732 1733t. Fixed a bug that caused some key bindings set in an inputrc to be ignored 1734 at shell startup. 1735 1736u. Fixed a bug that caused unsetting a local variable within a function to 1737 not work correctly. 1738 1739v. Fixed a bug that caused invalid variables to be created when using 1740 `read -a'. 1741 1742w. Fixed a bug that caused "$@" to expand incorrectly when used as the right 1743 hand side of a parameter expansion such as ${word:="$@"} if the first 1744 character of $IFS was not a space. 1745 1746x. Fixed a slight cosmetic problem when printing commands containing a 1747 `>&word' redirection. 1748 1749y. Fixed a problem that could cause here documents to not be created correctly 1750 if the system temporary directory did not allow writing. 1751 17522. Changes to Readline 1753 1754a. Change to history expansion functions to treat `^' as equivalent to word 1755 one, as the documention states. 1756 1757b. Some changes to the display code to improve display and redisplay of 1758 multibyte characters. 1759 1760c. Changes to speed up the multibyte character redisplay code. 1761 1762d. Fixed a bug in the vi-mode `E' command that caused it to skip over the 1763 last character of a word if invoked while point was on the word's 1764 next-to-last character. 1765 1766e. Fixed a bug that could cause incorrect filename quoting when 1767 case-insensitive completion was enabled and the word being completed 1768 contained backslashes quoting word break characters. 1769 1770f. Fixed a bug in redisplay triggered when the prompt string contains 1771 invisible characters. 1772 1773g. Fixed some display (and other) bugs encountered in multibyte locales 1774 when a non-ascii character was the last character on a line. 1775 1776h. Fixed some display bugs caused by multibyte characters in prompt strings. 1777 1778i. Fixed a problem with history expansion caused by non-whitespace characters 1779 used as history word delimiters. 1780 17813. New Features in Bash 1782 1783a. printf builtin understands two new escape sequences: \" and \?. 1784 1785b. `echo -e' understands two new escape sequences: \" and \?. 1786 1787c. The GNU `gettext' package and libintl have been integrated; the shell's 1788 messages can be translated into different languages. 1789 1790d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'. 1791 1792e. The error message printed when bash cannot open a shell script supplied 1793 as argument 1 now includes the name of the shell, to better identify 1794 the error as coming from bash. 1795 17964. New Features in Readline 1797 1798a. New application variable, rl_completion_quote_character, set to any 1799 quote character readline finds before it calls the application completion 1800 function. 1801 1802b. New application variable, rl_completion_suppress_quote, settable by an 1803 application completion function. If set to non-zero, readline does not 1804 attempt to append a closing quote to a completed word. 1805 1806c. New application variable, rl_completion_found_quote, set to a non-zero 1807 value if readline determines that the word to be completed is quoted. 1808 Set before readline calls any application completion function. 1809 1810d. New function hook, rl_completion_word_break_hook, called when readline 1811 needs to break a line into words when completion is attempted. Allows 1812 the word break characters to vary based on position in the line. 1813 1814e. New bindable command: unix-filename-rubout. Does the same thing as 1815 unix-word-rubout, but adds `/' to the set of word delimiters. 1816 1817------------------------------------------------------------------------------ 1818This document details the changes between this version, bash-3.0-alpha, 1819and the previous version, bash-2.05b-release. 1820 18211. Changes to Bash 1822 1823a. Fixes so that the shell will compile without some of the default options 1824 defined. 1825 1826b. Fixed an error message that did not pass enough arguments to printf. 1827 1828c. Fixed a bug that caused input redirection to a builtin inside a script 1829 being read from standard input to result in the rest of the already- 1830 read and buffered script to be discarded. 1831 1832d. Fixed a bug that caused subshell initialization to close the file 1833 descriptor from which the shell was reading a script under certain 1834 circumstances. 1835 1836e. Fixed a bug that caused the shell to not advance a string pointer over 1837 a null wide character when doing string operations. 1838 1839f. Fixed the internal logout code so that shells that time out waiting for 1840 input (using $TMOUT) run ~/.bash_logout. 1841 1842g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD. 1843 1844h. The parser no longer adds implicit double quotes to ((...)) arithmetic 1845 commands. 1846 1847i. The ((...)) arithmetic command evaluation code was fixed to not dump core 1848 when the expanded string is null. 1849 1850j. The ((...)) arithmetic command evaluation code was fixed to not perform 1851 variable assignments while expanding the expression. 1852 1853k. Fixed a bug that caused word splitting to be performed incorrectly when 1854 IFS is set, but null. 1855 1856l. Fixed a bug in brace expansion that caused a quoted `$' preceding an 1857 open brace to inhibit brace expansion. 1858 1859m. Fixed a bug that caused a leading `-' in the shell's name to cause it to 1860 not be recognized as a restricted shell. 1861 1862n. Fixed a bug in the arithmetic evaluation code that could cause longjmps 1863 to an invalid location and result in a core dump. 1864 1865o. Fixed a bug in the calculation of how many history lines are new in a 1866 single shell session when reading new history lines from a file with 1867 `history -n'. 1868 1869p. Fixed a bug in pathname canonicalization that caused the shell to dump 1870 core when presented with a pathname longer than PATH_MAX. 1871 1872q. Fixed the parser so that it doesn't try to compare a char variable to 1873 EOF, which fails when chars are unsigned. 1874 1875r. Fixed a bug in the simple command execution code that caused occasional 1876 core dumps. 1877 1878s. The shell does a better job of saving any partial parsing state during 1879 operations which cause a command to be executed while a line is being 1880 entered and parsed. 1881 1882t. The completion code now splits words more like the expansion code when 1883 $IFS is used to split. 1884 1885u. The locale code does a better job of recomputing the various locale 1886 variable values when LC_ALL is unset. 1887 1888v. The programmable completion code does a better job of dequoting expanded 1889 word lists before comparing them against the word to be matched. 1890 1891w. The shell no longer seg faults if the expanded value of $PS4 is null 1892 and `set -x' is enabled. 1893 1894x. Fixed a bug that caused core dumps when a here string expanded to NULL. 1895 1896y. The mail checking code now makes sure the mailbox is bigger before 1897 reporting the existence of new mail. 1898 1899z. The parser does not try to expand $'...' and $"..." when the appear 1900 within double quotes unless the `extquote' option has been enabled with 1901 `shopt'. For backwards compatibility, it is enabled by default. 1902 1903aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use 1904 $@ instead of "$@" for the implicit list of arguments. 1905 1906bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one 1907 spawned to execute a pipeline) to not exit immediately if attempting 1908 to use a command containing a slash. 1909 1910cc. Fixed a problem with empty replacements for a pattern that doesn't match 1911 when performing ${param/word/} expansion. 1912 1913dd. Word expansions performed while expanding redirections no longer search 1914 a command's temporary environment to expand variable values. 1915 1916ee. Improvements to the alias expansion code when expanding subsequent words 1917 because an aliase's value ends with a space. 1918 1919ff. `cd -' now prints the current working directory after a successful chdir 1920 even when the shell is not interactive, as the standard requires. 1921 1922gg. The shell does a better job of ensuring a child process dies of SIGINT 1923 before resending SIGINT to itself. 1924 1925hh. The arithmetic expansion variable assignment code now does the right 1926 thing when assigning to `special' variables like OPTIND. 1927 1928ii. When history expansion verification is enabled, the bash readline helper 1929 functions that do history expansion on the current line don't print 1930 the results. 1931 1932jj. Fixed bugs with multiple consecutive alias expansion when one of the 1933 expansions ends with a space. 1934 1935kk. Fixed a problem in the programmable completion code that could cause core 1936 dumps when trying to initialize a set of possible completions from a 1937 list of variables. 1938 1939ll. The \[ and \] escape characters are now ignored when decoding the prompt 1940 string if the shell is started with editing disabled. 1941 1942mm. Fixed a bug that could leave extra characters in a string when doing 1943 quoted null character removal. 1944 1945nn. Command substitution and other subshell operations no longer reset the 1946 line number (aids the bash debugger). 1947 1948oo. Better line number management when executing simple commands, conditional 1949 commands, for commands, and select commands. 1950 1951pp. The globbing code now uses malloc, with its better failure properties, 1952 rather than alloca(). 1953 1954qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the 1955 appropriate array element instead of a variable named `a[2]'. 1956 1957rr. Fixed a bug in the handling of a `?(...)' pattern immediately following 1958 a `*' when extglob is enabled. 1959 1960ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is 1961 invoked in a function to misbehave. 1962 1963tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped 1964 by the internal shell string quoting functions. 1965 1966uu. Fixed a bug that caused quoted null characters in an expanded word list 1967 to be inappropriately assigned to an array variable when using `read -a'. 1968 1969vv. Fixed a bug that caused redirections accompanying a null command to persist 1970 in the current shell. 1971 1972ww. Fixed a bug that caused the prompt to be printed when the shell was 1973 expanding a multiline alias. 1974 1975xx. Fixed a bug that resulted in core dumps when the completion for a command 1976 changed the compspec. 1977 1978yy. Fixed a bug that caused evaluation of programmable completions to print 1979 notifications of completed jobs. 1980 1981zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb' 1982 (which is what emacs shell windows do). 1983 1984aaa. In posix mode, `kill -l' causes signal names to be displayed without 1985 a leading `SIG'. 1986 1987bbb. Clear error flag on standard output so it doesn't persist across multiple 1988 builtin commands. 1989 1990ccc. In posix mode, `alias' displays alias values without the leading `alias', 1991 so the output cannot be used as subsequent input. 1992 1993ddd. In posix mode, the `trap' builtin doesn't check whether or not its 1994 first argument is a signal specification and revert the signal handling 1995 to its original disposition if it is. 1996 1997eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the 1998 pattern substitution and removal expansions. 1999 2000fff. Fixed several problems with the handling of ${array[@]}, ${array[*]}, 2001 $@, and $* by the indirect variable expansion code. 2002 2003ggg. Fixed a bug that did not allow `time' to be aliased. 2004 2005hhh. Improved the mail checking code so it won't check (and possibly cause an 2006 NFS file system mount) until MAILPATH or MAIL is given a value -- there 2007 is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time. 2008 (It is computed by configure, but can be #undef'd in config-bot.h.) 2009 2010iii. If the `chkwinsize' option is enabled, the shell checks for window size 2011 changes if a child process exits due to a signal. 2012 2013jjj. Removed the attempts to avoid adding a slash at the end of a completed 2014 executable name if there was a directory with the same name in the 2015 current directory. 2016 2017kkk. Fixed PATH lookup code so it treats the permission bits separately for 2018 owner, group, and other, rather than checking them all. 2019 2020lll. Fixed the locale code to reset the parser's idea of the character class 2021 <blank>, which controls how it splits tokens, when the locale changes. 2022 2023mmm. The shell now binds its special readline functions and key bindings only 2024 if the user's inputrc file has not already bound them. 2025 2026nnn. The shell now reports on processes that dump core due to signals when 2027 invoked as `-c command'. 2028 20292. Changes to Readline 2030 2031a. Fixes to avoid core dumps because of null pointer references in the 2032 multibyte character code. 2033 2034b. Fix to avoid infinite recursion caused by certain key combinations. 2035 2036c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly. 2037 2038d. Readline no longer tries to read ahead more than one line of input, even 2039 when more is available. 2040 2041e. Fixed the code that adjusts the point to not mishandle null wide 2042 characters. 2043 2044f. Fixed a bug in the history expansion `g' modifier that caused it to skip 2045 every other match. 2046 2047g. Fixed a bug that caused the prompt to overwrite previous output when the 2048 output doesn't contain a newline and the locale supports multibyte 2049 characters. This same change fixes the problem of readline redisplay 2050 slowing down dramatically as the line gets longer in multibyte locales. 2051 2052h. History traversal with arrow keys in vi insertion mode causes the cursor 2053 to be placed at the end of the new line, like in emacs mode. 2054 2055i. The locale initialization code does a better job of using the right 2056 precedence and defaulting when checking the appropriate environment 2057 variables. 2058 2059j. Fixed the history word tokenizer to handle <( and >( better when used as 2060 part of bash. 2061 2062k. The overwrite mode code received several bug fixes to improve undo. 2063 2064l. Many speedups to the multibyte character redisplay code. 2065 2066m. The callback character reading interface should not hang waiting to read 2067 keyboard input. 2068 2069n. Fixed a bug with redoing vi-mode `s' command. 2070 2071o. The code that initializes the terminal tracks changes made to the terminal 2072 special characters with stty(1) (or equivalent), so that these changes 2073 are reflected in the readline bindings. New application-callable function 2074 to make it work: rl_tty_unset_default_bindings(). 2075 2076p. Fixed a bug that could cause garbage to be inserted in the buffer when 2077 changing character case in vi mode when using a multibyte locale. 2078 2079q. Fixed a bug in the redisplay code that caused problems on systems 2080 supporting multibyte characters when moving between history lines when the 2081 new line has more glyphs but fewer bytes. 2082 2083r. Undo and redo now work better after exiting vi insertion mode. 2084 2085s. Make sure system calls are restarted after a SIGWINCH is received using 2086 SA_RESTART. 2087 2088t. Improvements to the code that displays possible completions when using 2089 multibyte characters. 2090 2091u. Fixed a problem when parsing nested if statements in inputrc files. 2092 2093v. The completer now takes multibyte characters into account when looking for 2094 quoted substrings on which to perform completion. 2095 2096w. The history search functions now perform better bounds checking on the 2097 history list. 2098 20993. New Features in Bash 2100 2101a. ANSI string expansion now implements the \x{hexdigits} escape. 2102 2103b. There is a new loadable `strftime' builtin. 2104 2105c. New variable, COMP_WORDBREAKS, which controls the readline completer's 2106 idea of word break characters. 2107 2108d. The `type' builtin no longer reports on aliases unless alias expansion 2109 will actually be performed. 2110 2111e. HISTCONTROL is now a colon-separated list of values, which permits 2112 more extensibility and backwards compatibility. 2113 2114f. HISTCONTROL may now include the `erasedups' option, which causes all lines 2115 matching a line being added to be removed from the history list. 2116 2117g. `configure' has a new `--enable-multibyte' argument that permits multibyte 2118 character support to be disabled even on systems that support it. 2119 2120h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV, 2121 BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING, 2122 BASH_COMMAND 2123 2124i. FUNCNAME has been changed to support the debugger: it's now an array 2125 variable. 2126 2127j. for, case, select, arithmetic commands now keep line number information 2128 for the debugger. 2129 2130k. There is a new `RETURN' trap executed when a function or sourced script 2131 returns (not inherited child processes; inherited by command substitution 2132 if function tracing is enabled and the debugger is active). 2133 2134l. New invocation option: --debugger. Enables debugging and turns on new 2135 `extdebug' shell option. 2136 2137m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR 2138 traps, respectively, to be inherited by shell functions. Equivalent to 2139 `set -T' and `set -E' respectively. The `functrace' option also controls 2140 whether or not the DEBUG trap is inherited by sourced scripts. 2141 2142n. The DEBUG trap is run before binding the variable and running the action 2143 list in a `for' command, binding the selection variable and running the 2144 query in a `select' command, and before attempting a match in a `case' 2145 command. 2146 2147o. New `--enable-debugger' option to `configure' to compile in the debugger 2148 support code. 2149 2150p. `declare -F' now prints out extra line number and source file information 2151 if the `extdebug' option is set. 2152 2153q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes 2154 the next command to be skipped, and a return value of 2 while in a 2155 function or sourced script forces a `return'. 2156 2157r. New `caller' builtin to provide a call stack for the bash debugger. 2158 2159s. The DEBUG trap is run just before the first command in a function body is 2160 executed, for the debugger. 2161 2162t. `for', `select', and `case' command heads are printed when `set -x' is 2163 enabled. 2164 2165u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1, 2166 x+2,...,y}. x and y can be integers or single characters; the sequence 2167 may ascend or descend; the increment is always 1. 2168 2169v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices) 2170 of array. 2171 2172w. New `force_fignore' shopt option; if enabled, suffixes specified by 2173 FIGNORE cause words to be ignored when performing word completion even 2174 if they're the only possibilities. 2175 2176x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu 2177 style' (filename:lineno:message) format. 2178 2179y. New `-o bashdefault' option to complete and compgen; if set, causes the 2180 whole set of bash completions to be performed if the compspec doesn't 2181 result in a match. 2182 2183z. New `-o plusdirs' option to complete and compgen; if set, causes directory 2184 name completion to be performed and the results added to the rest of the 2185 possible completions. 2186 2187aa. `kill' is available as a builtin even when the shell is built without 2188 job control. 2189 2190bb. New HISTTIMEFORMAT variable; value is a format string to pass to 2191 strftime(3). If set and not null, the `history' builtin prints out 2192 timestamp information according to the specified format when displaying 2193 history entries. If set, bash tells the history library to write out 2194 timestamp information when the history file is written. 2195 2196cc. The [[ ... ]] command has a new binary `=~' operator that performs 2197 extended regular expression (egrep-like) matching. 2198 2199dd. `configure' has a new `--enable-cond-regexp' option (enabled by default) 2200 to enable the =~ operator and regexp matching in [[ ... ]]. 2201 2202ee. Subexpressions matched by the =~ operator are placed in the new 2203 BASH_REMATCH array variable. 2204 2205ff. New `failglob' option that causes an expansion error when pathname 2206 expansion fails to produce a match. 2207 2208gg. New `set -o pipefail' option that causes a pipeline to return a failure 2209 status if any of the processes in the pipeline fail, not just the last 2210 one. 2211 22124. New Features in Readline 2213 2214a. History expansion has a new `a' modifier equivalent to the `g' modifier 2215 for compatibility with the BSD csh. 2216 2217b. History expansion has a new `G' modifier equivalent to the BSD csh `g' 2218 modifier, which performs a substitution once per word. 2219 2220c. All non-incremental search operations may now undo the operation of 2221 replacing the current line with the history line. 2222 2223d. The text inserted by an `a' command in vi mode can be reinserted with 2224 `.'. 2225 2226e. New bindable variable, `show-all-if-unmodified'. If set, the readline 2227 completer will list possible completions immediately if there is more 2228 than one completion and partial completion cannot be performed. 2229 2230f. There is a new application-callable `free_history_entry()' function. 2231 2232g. History list entries now contain timestamp information; the history file 2233 functions know how to read and write timestamp information associated 2234 with each entry. 2235 2236h. Four new key binding functions have been added: 2237 2238 rl_bind_key_if_unbound() 2239 rl_bind_key_if_unbound_in_map() 2240 rl_bind_keyseq_if_unbound() 2241 rl_bind_keyseq_if_unbound_in_map() 2242 2243------------------------------------------------------------------------------ 2244This document details the changes between this version, bash-2.05b-release, 2245and the previous version, bash-2.05b-beta2. 2246 22471. Changes to Bash 2248 2249a. Fixed an off-by-one error in the function that translates job 2250 specifications. 2251 2252b. Note that we're running under Emacs and disable line editing if 2253 $EMACS == `t'. 2254 2255------------------------------------------------------------------------------ 2256This document details the changes between this version, bash-2.05b-beta2, 2257and the previous version, bash-2.05b-beta1. 2258 22591. Changes to Bash 2260 2261a. Fixed the /= and %= arithmetic operators to catch division by zero. 2262 2263b. Added putenv, setenv, unsetenv to getenv replacement for completeness. 2264 2265c. Fixed a bug that could cause the -O expand_aliases invocation option 2266 to not take effect. 2267 2268d. Fixed a problem with process substitution that resulted in incorrect 2269 behavior when the number of process substitutions in an individual 2270 command approached 64. 2271 22722. Changes to Readline 2273 2274a. Fixed a problem with backward-char-search when on a system with support 2275 for multibyte characters when running in a locale without any multibyte 2276 characters. 2277 2278------------------------------------------------------------------------------ 2279This document details the changes between this version, bash-2.05b-beta1, 2280and the previous version, bash-2.05b-alpha1. 2281 22821. Changes to Bash 2283 2284a. Fixed a problem when parsing a POSIX.2 character class name while 2285 evaluating a bracket expression containing multibyte characters. 2286 2287b. Changed the help text for `bind' to make it clear that any command 2288 that may be placed in ~/.inputrc is a valid argument to `bind'. 2289 2290c. Added `help' builtin entries for `((', `[[', and arithmetic for. 2291 2292d. malloc updated again: 2293 o slightly better overflow and underflow detection by putting the 2294 chunk size at the beginning and end of the chunk and making 2295 sure they match in free/realloc 2296 o partial page allocated to make things page-aligned no longer 2297 completely wasted 2298 o block coalescing now enabled by default 2299 o splitting and coalescing enabled for 32-byte chunks, the most 2300 common size requested 2301 o fixed a problem that resulted in spurious underflow messages and 2302 aborts 2303 o bin sizes are precomputed and stored in an array rather than 2304 being computed at run time 2305 o malloc will return memory blocks back to the system if the block 2306 being freed is at the top of the heap and of sufficient size to 2307 make it worthwhile 2308 o malloc/free/realloc now inline memset instead of calling the 2309 libc function; uses Duff's device for good performance 2310 2311e. Check for getservent(); make the service name completion code dependent 2312 on its presence. 2313 2314f. Changed the readline callback that executes a command bound to a key 2315 sequence to not save the executed command on the history list and to 2316 save and restore the parsing state. 2317 2318g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G' 2319 floating point format display; implemented the "'" flag character 2320 that turns on thousands' grouping; fixed behavior on systems where 2321 MB_CUR_MAX does not evaluate to a constant. 2322 2323h. The `unset' builtin no longer returns a failure status when asked to 2324 unset a previously-unset variable or function. 2325 2326i. Changes to the build system to make it easier to cross-compile bash 2327 for different systems. 2328 2329j. Added `,' to the characters that are backslash-escaped during filename 2330 completion, to avoid problems with complete-into-braces and RCS filenames 2331 containing commas. 2332 2333k. Some changes to the multibyte character support code to avoid many calls 2334 to strlen(). 2335 2336l. Bash now correctly honors setting LANG to some value when LC_ALL does not 2337 already have a value. 2338 2339m. Fixed a bug that could cause SIGSEGV when processing nested traps with 2340 trap handlers. 2341 2342n. The `source/.' builtin now restores the positional parameters when it 2343 returns unless they were changed using the `set' builtin during the file's 2344 execution. 2345 2346o. Fixed a bug that caused a syntax error when a command was terminated by 2347 EOF. 2348 23492. New Features in Bash 2350 2351a. There is now support for placing the long help text into separate files 2352 installed into ${datadir}/bash. Not enabled by default; can be turned 2353 on with `--enable-separate-helpfiles' option to configure. 2354 2355b. All builtins that take operands accept a `--' pseudo-option, except 2356 `echo'. 2357 2358c. The `echo' builtin now accepts \0xxx (zero to three octal digits following 2359 the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/ 2360 POSIX.1-2001 compliance. 2361 23623. Changes to Readline 2363 2364a. Fixed a small problem in _rl_insert_char with multibyte characters. 2365 2366b. Fixes from IBM for line wrapping problems when using multibyte characters. 2367 2368c. Fixed a problem which caused the display to be messed up when the last 2369 line of a multi-line prompt (possibly containing invisible characters) 2370 was longer than the screen width. 2371 2372d. Fixed a problem with the vi-mode `r' command that ocurred on systems with 2373 support for multibyte characters when running in a locale without any 2374 multibyte characters. 2375 2376------------------------------------------------------------------------------ 2377This document details the changes between this version, bash-2.05b-alpha1, 2378and the previous version, bash-2.05a-release. 2379 23801. Changes to Bash 2381 2382a. Some changes to work around inlining differences between compilers. 2383 2384b. Added more prototypes for internal shell typedefs, to catch argument 2385 passing errors when using pointers to functions. 2386 2387c. The `cd' builtin now fails in posix mode when a valid directory cannot be 2388 constructed from a relative pathname argument and the $PWD using pathname 2389 canonicalization, and the -P option has not been supplied. Previously, 2390 the shell would attempt to use what the user typed, leading to weird 2391 values for $PWD and discrepancies between the value of $PWD and the 2392 actual working directory. 2393 2394d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir 2395 to the pathname passed as an argument succeeds (when not in posix mode). 2396 2397e. The `fc' builtin has been fixed, as POSIX requires, to use the closest 2398 history position in range when given an out-of-range argument. 2399 2400f. The history file loading code was changed to allow lines to be saved in 2401 the history list from the shell startup files. 2402 2403g. `history -s args' now works better in compound commands. 2404 2405h. The tilde expansion code was fixed to better recognize when it's being 2406 invoked in an assignment context, which enables expansion after `=' 2407 and `:'. 2408 2409i. Fixed the command name completion code so a slash is no longer appended 2410 to a single match if there happens to be a directory with that name in 2411 $PWD. 2412 2413j. Fixed compound array assignment to no longer perform alias expansion, to 2414 allow reserved words as array members, and to not produce extra output 2415 when the `-v' option had been enabled. 2416 2417k. Fixed the programmable completion code to better handle newlines in lists 2418 of possible completions (e.g., `complete -W'). 2419 2420l. Removed the reserved words from the `bash-builtins' manual page. 2421 2422m. Parser error reporting now attempts to do a better job of identifying the 2423 token in error rather than doing straight textual analysis. 2424 2425n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length 2426 arguments in the library snprintf(3) replacement. 2427 2428o. `read -e' no longer does command name completion on the first word on 2429 the line being read. 2430 2431p. `select' now returns failure if the read of the user's selection fails. 2432 2433q. Fixed a bug that could cause a core dump when setting $PIPESTATUS. 2434 2435r. Fixes to not allocate so many job slots when the shell is running a loop 2436 with job control enabled in a subshell of an interactive shell. 2437 2438s. Fixed a bug in the trap code that caused traps to be inherited by 2439 command substitutions in some cases. 2440 2441t. Fixed a bug that could cause alias expansion to inappropriately expand 2442 the word following the alias. 2443 2444u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments. 2445 2446v. The parser is less lenient when parsing assignment statements where the 2447 characters before the `=' don't comprise a valid identifier. 2448 2449w. The arithmetic expression evaluation code now honors the setting of the 2450 `-u' option when expanding variable names. 2451 2452x. Fixed the arithmetic evaluation code to allow array subscripts to be 2453 assigned (`let b[7]=42') and auto-incremented and auto-decremented 2454 (e.g., b[7]++). 2455 2456y. Reimplemented the existing prompt string date and time expansions using 2457 strftime(3), which changed the output of \@ in some locales. 2458 2459z. Fixed a bug that could cause a core dump when a special shell variable 2460 (like RANDOM) was converted to an array with a variable assignment. 2461 2462aa. Fixed a bug that would reset the handler for a signal the user had 2463 trapped to a function that would exit the shell when setting the exit 2464 trap in a non-interactive shell. 2465 2466bb. Changed the execve(2) wrapper code to check whether or not a failing 2467 command is a directory before looking at whether a `#!' interpreter 2468 failed for some reason. 2469 2470cc. Fixed a bug in the command printing code so it no longer inserts a `;' 2471 after a newline, which produces a syntax error when reused as input. 2472 2473dd. The code that expands $PS4 no longer inherits the `-x' flag. 2474 2475ee. The bash-specific completion functions may now take advantage of the 2476 double-TAB and M-? features of the standard readline completion 2477 functions. 2478 2479ff. The mail checking code no longer prints a message if the checked file's 2480 size has not increased, even if the access time is less than the modification time. 2481 2482gg. Rewrote the variable symbol table code: there is now a stack of 2483 contexts, each possibly including a separate symbol table; there can 2484 be more than one temporary environment supplied to nested invocations 2485 of `./source'; the temporary environments no longer require so much 2486 special-case code; shell functions now handle the temporary environment 2487 and local variables more consistently; function scope exit is faster now 2488 that the entire symbol table does not have to be traversed to dispose of 2489 local variables; it is now easier to push vars from the temporary 2490 environment to the shell's variable table in posix mode; some duplicated 2491 code has been removed. 2492 2493hh. Regularized the error message printing code; builtin_error is now called 2494 more consistently, and common error message strings are handled by small 2495 functions. This should make eventual message translation easier. 2496 2497ii. Error messages now include the line number in a script when the shell 2498 is not interactive. 2499 2500jj. Array subscript expansion now takes place even when the array variable is 2501 unset, so side effects will take place. 2502 2503kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find 2504 jobs already marked as terminated if the OS reuses pids quickly enough. 2505 2506ll. Fixed a bug that could cause a signal to not interrupt the `wait' 2507 builtin while it was waiting for a background process to terminate. 2508 2509mm. A couple of changes to make it easier for multiple shells to share history 2510 files using `history -n', `history -r', and `history -w'. 2511 2512nn. The `getopts' builtin always increments OPTIND to point to the next 2513 option to be handled when an option is returned, whether it's valid 2514 or not, as POSIX 1003.x-2001 requires. 2515 2516oo. Changed some parts of the expansion code to avoid allocating and 2517 immediately freeing memory without using the results for anything. 2518 2519pp. The shell now keeps track of $IFS internally, updating its internal map 2520 each time the variable is assigned a new value (or at local scope exit). 2521 This saves thousands of hash lookups for IFS, which, while individually 2522 cheap, add up. 2523 2524qq. Rewrote the hash table code: searching and insertion are much faster now, 2525 and it uses a better string hashing function; augmented the function 2526 interface to simplify other parts of the code and remove duplicated code 2527 2528rr. The shell now uses a simple, generic `object cache' for allocating and 2529 caching words and word lists, which were the major users of 2530 malloc/free. 2531 2532ss. Fixed the assignment statement parsing code to allow whitespace and 2533 newlines in subscripts when performing array element assignment. 2534 2535tt. The shell now issues many fewer calls to sigprocmask and other signal 2536 masking system calls. 2537 2538uu. Fixed the `test' and conditional command file comparison operators to 2539 work right when one file has a non-positive timestamp and the other 2540 does not exist. 2541 2542vv. Fixed some cases where the special characters '\001' and '\177' in the 2543 values of variables or positional parameters caused incorrect expansion 2544 results. 2545 25462. Changes to Readline 2547 2548a. Fixed output of comment-begin character when listing variable values. 2549 2550b. Added some default key bindings for common escape sequences produced by 2551 HOME and END keys. 2552 2553c. Fixed the mark handling code to be more emacs-compatible. 2554 2555d. A bug was fixed in the code that prints possible completions to keep it 2556 from printing empty strings in certain circumstances. 2557 2558e. Change the key sequence printing code to print ESC as M\- if ESC is a 2559 meta-prefix character -- it's easier for users to understand than \e. 2560 2561f. Fixed unstifle_history() to return values that match the documentation. 2562 2563g. Fixed the event loop (rl_event_hook) to handle the case where the input 2564 file descriptor is invalidated. 2565 2566h. Fixed the prompt display code to work better when the application has a 2567 custom redisplay function. 2568 2569i. Changes to make reading and writing the history file a little faster, and 2570 to cope with huge history files without calling abort(3) from xmalloc. 2571 2572j. The vi-mode `S' and `s' commands are now undone correctly. 2573 25743. New Features in Bash 2575 2576a. If set, TMOUT is the default timeout for the `read' builtin. 2577 2578b. `type' has two new options: `-f' suppresses shell function lookup, and 2579 `-P' forces a $PATH search. 2580 2581c. New code to handle multibyte characters. 2582 2583d. `select' was changed to be more ksh-compatible, in that the menu is 2584 reprinted each time through the loop only if REPLY is set to NULL. 2585 The previous behavior is available as a compile-time option. 2586 2587e. `complete -d' and `complete -o dirnames' now force a slash to be 2588 appended to names which are symlinks to directories. 2589 2590f. There is now a bindable edit-and-execute-command readline command, 2591 like the vi-mode `v' command, bound to C-xC-e in emacs mode. 2592 2593g. Added support for ksh93-like [:word:] character class in pattern matching. 2594 2595h. The $'...' quoting construct now expands \cX to Control-X. 2596 2597i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts 2598 the result into the expanded prompt. 2599 2600j. The shell now performs arithmetic in the largest integer size the 2601 machine supports (intmax_t), instead of long. 2602 2603k. If a numeric argument is supplied to one of the bash globbing completion 2604 functions, a `*' is appended to the word before expansion is attempted. 2605 2606l. The bash globbing completion functions now allow completions to be listed 2607 with double tabs or if `show-all-if-ambiguous' is set. 2608 2609m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses 2610 readline's appending a space to the completed word. 2611 2612n. New `here-string' redirection operator: <<< word. 2613 2614o. When displaying variables, function attributes and definitions are shown 2615 separately, allowing them to be re-used as input (attempting to re-use 2616 the old output would result in syntax errors). 2617 2618p. There is a new configuration option `--enable-mem-scramble', controls 2619 bash malloc behavior of writing garbage characters into memory at 2620 allocation and free time. 2621 2622q. The `complete' and `compgen' builtins now have a new `-s/-A service' 2623 option to complete on names from /etc/services. 2624 2625r. `read' has a new `-u fd' option to read from a specified file descriptor. 2626 2627s. Fix the completion code so that expansion errors in a directory name 2628 don't cause a longjmp back to the command loop. 2629 2630t. Fixed word completion inside command substitution to work a little more 2631 intuitively. 2632 2633u. The `printf' %q format specifier now uses $'...' quoting to print the 2634 argument if it contains non-printing characters. 2635 2636v. The `declare' and `typeset' builtins have a new `-t' option. When applied 2637 to functions, it causes the DEBUG trap to be inherited by the named 2638 function. Currently has no effect on variables. 2639 2640w. The DEBUG trap is now run *before* simple commands, ((...)) commands, 2641 [[...]] conditional commands, and for ((...)) loops. 2642 2643x. The expansion of $LINENO inside a shell function is only relative to the 2644 function start if the shell is interactive -- if the shell is running a 2645 script, $LINENO expands to the line number in the script. This is as 2646 POSIX-2001 requires. 2647 2648y. The bash debugger in examples/bashdb has been modified to work with the 2649 new DEBUG trap semantics, the command set has been made more gdb-like, 2650 and the changes to $LINENO make debugging functions work better. Code 2651 from Gary Vaughan. 2652 2653z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup 2654 and close). 2655 2656aa. There is a new `-l' invocation option, equivalent to `--login'. 2657 2658bb. The `hash' builtin has a new `-l' option to list contents in a reusable 2659 format, and a `-d' option to remove a name from the hash table. 2660 26614. New Features in Readline 2662 2663a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both 2664 be bound to readline functions. Now the arrow keys may be used in vi 2665 insert mode. 2666 2667b. When listing completions, and the number of lines displayed is more than 2668 the screen length, readline uses an internal pager to display the results. 2669 This is controlled by the `page-completions' variable (default on). 2670 2671c. New code to handle editing and displaying multibyte characters. 2672 2673d. The behavior introduced in bash-2.05a of deciding whether or not to 2674 append a slash to a completed name that is a symlink to a directory has 2675 been made optional, controlled by the `mark-symlinked-directories' 2676 variable (default is the 2.05a behavior). 2677 2678e. The `insert-comment' command now acts as a toggle if given a numeric 2679 argument: if the first characters on the line don't specify a 2680 comment, insert one; if they do, delete the comment text 2681 2682f. New application-settable completion variable: 2683 rl_completion_mark_symlink_dirs, allows an application's completion 2684 function to temporarily override the user's preference for appending 2685 slashes to names which are symlinks to directories. 2686 2687g. New function available to application completion functions: 2688 rl_completion_mode, to tell how the completion function was invoked 2689 and decide which argument to supply to rl_complete_internal (to list 2690 completions, etc.). 2691 2692h. Readline now has an overwrite mode, toggled by the `overwrite-mode' 2693 bindable command, which could be bound to `Insert'. 2694 2695i. New application-settable completion variable: 2696 rl_completion_suppress_append, inhibits appending of 2697 rl_completion_append_character to completed words. 2698 2699j. New key bindings when reading an incremental search string: ^W yanks 2700 the currently-matched word out of the current line into the search 2701 string; ^Y yanks the rest of the current line into the search string, 2702 DEL or ^H deletes characters from the search string. 2703 2704------------------------------------------------------------------------------ 2705This document details the changes between this version, bash-2.05a-release, 2706and the previous version, bash-2.05a-rc1. 2707 27081. Changes to Bash 2709 2710a. Fixed the `printf' builtin so that the variable name supplied as an 2711 argument to a %n conversion must be a valid shell identifier. 2712 2713b. Improved the random number generator slightly. 2714 2715c. Changes to configuration to not put -I/usr/include into $CFLAGS, since 2716 it messes up some includes. 2717 2718d. Corrected description of POSIXLY_CORRECT in man page and info manual. 2719 2720e. Fixed a couple of cases of incorrect function prototypes that sneaked 2721 through and caused compilation problems. 2722 2723f. A few changes to avoid potential core dumps in the programmable completion 2724 code. 2725 2726g. Fixed a configure problem that could cause a non-existent file to show 2727 up in LIBOBJS. 2728 2729h. Fixed a configure problem that could cause siglist.o to not be built when 2730 required. 2731 2732i. Changes to the strtoimax and strtoumax replacement functions to work 2733 around buggy compilers. 2734 2735j. Fixed a problem with the snprintf replacement function that could 2736 potentially cause a core dump. 2737 27382. Changes to Readline 2739 2740a. Fixed a locale-specific problem in the vi-mode `goto mark' command. 2741 2742b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause 2743 include file problems. 2744 2745------------------------------------------------------------------------------ 2746This document details the changes between this version, bash-2.05a-rc1, 2747and the previous version, bash-2.05a-beta1. 2748 27491. Changes to Bash 2750 2751a. Fixed the snprintf replacement to correctly implement the `alternate form' 2752 of the %g and %G conversions. 2753 2754b. Fixed snprintf to correctly handle the optional precision with the %g and 2755 %G conversions. 2756 2757c. Fixed the arithmetic evaluation code to correct the values of `@' and `_' 2758 when translating base-64 constants (they were backwards). 2759 2760d. New library functions for formatting long and long long ints. 2761 2762e. Fixed a few places where negative array subscripts could have occurred, 2763 mostly as the result of systems using signed characters. 2764 2765f. Fixed a few places that assumed a pid_t was no wider than an int. 2766 2767g. Fixed the `maildir' mail checking code to work on systems where a 2768 `struct stat' doesn't include an `st_blocks' member. 2769 2770h. Fixed snprintf to make `unsigned long long' conversion formats (%llu) 2771 work better. 2772 2773i. Fixed snprintf to not print a sign when asked to do an unsigned conversion. 2774 2775j. Made configure changes to avoid compiling empty source files in lib/sh. 2776 2777k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax, 2778 strtoumax. 2779 2780l. The `printf' builtin now handles the `ll' and `j' length modifiers 2781 directly, since they can affect the type and width of the argument 2782 passed to printf(3). 2783 2784m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to 2785 have more sytematic naming, with accompanying changes to configure.in. 2786 2787n. Fixed snprintf to handle long doubles and the %a/%A conversions by 2788 falling back to sprintf, as long as sprintf supports them. 2789 2790o. Fixed return value from vsnprintf/snprintf to be the number of characters 2791 that would have been printed, even if that number exceeds the buffer 2792 size passed as an argument. 2793 2794p. Bash no longer attempts to define its own versions of some ctype macros 2795 if they are implemented as functions in libc but not as macros in 2796 <ctype.h>. 2797 2798q. Changed the variable printing code (used by `set', `export', etc.) to 2799 not use the $'...' syntax when in posix mode, since that caused 2800 interoperability problems with other shells (most notably with autoconf). 2801 When not in posix mode, it uses $'...' if the string to be printed 2802 contains non-printing characters and regular single quotes otherwise. 2803 2804r. snprintf now recognizes the %F conversion. 2805 2806s. Fixed a bug that could cause the wrong status to be returned by a shell 2807 function when the shell is compiled without job control and a null 2808 command containing a command substutition was executed in the function. 2809 2810t. When in posix mode, the default value for MAILCHECK is 600. 2811 2812u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables 2813 if they're not in the initial environment. 2814 2815v. If SECONDS appears in the initial environment with a valid integer value, 2816 bash uses that as the starting value, as if an assignment had been 2817 performed. 2818 2819w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it 2820 gives them default values if they don't appear in the initial environment. 2821 2822x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE, 2823 even if it assigns them default values. 2824 2825y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT 2826 if they appear in the initial environment. 2827 2828z. Bash no longer attempts to discover if it's being run by sshd in order to 2829 run the startup files. If the SSH_SOURCE_BASHRC is uncommented in 2830 config-top.h it will attempt to do so as previously, but that's commented 2831 out in the distributed version. 2832 2833aa. Fixed a typo in the code that tests for LC_NUMERIC. 2834 2835bb. The POSIXLY_CORRECT shell variable and its effects are now documented. 2836 2837cc. Some changes to several of the support shell scripts included in the 2838 definitions to try to avoid race conditions and attacks. 2839 2840dd. Several changes to avoid warnings from `gcc -Wall'. 2841 2842ee. Fixed a problem with the `unset' builtin that could cause incorrect 2843 results if asked to unset a variable and an array subscript in the 2844 same command. 2845 2846ff. A few changes to the shell's temporary file creation code to avoid 2847 potential file descriptor leaks and to prefer the system's idea of 2848 the temporary directory to use. 2849 2850gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system 2851 requires it but the shell has been configured --without-bash-malloc. 2852 2853hh. Updated the documentation to note that only interactive shells resend 2854 SIGHUP to all jobs before exiting. 2855 2856ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than 2857 rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x 2858 will remove backslashes in any login name passed to getpwnam(3)). 2859 2860jj. Small change from Paul Eggert to make LINENO right in commands run with 2861 `bash -c'. 2862 28632. New Features in Bash 2864 2865a. The `printf' builtin now handles the %a and %A conversions if they're 2866 implemented by printf(3). 2867 2868b. The `printf' builtin now handles the %F conversion (just about like %f). 2869 2870c. The `printf' builtin now handles the %n conversion like printf(3). The 2871 corresponding argument is the name of a shell variable to which the 2872 value is assigned. 2873 28743. Changes to Readline 2875 2876a. Fixed a few places where negative array subscripts could have occurred. 2877 2878b. Fixed the vi-mode code to use a better method to determine the bounds of 2879 the array used to hold the marks. 2880 2881c. Fixed the defines in chardefs.h to work better when chars are signed. 2882 2883d. Fixed configure.in to use the new names for bash autoconf macros. 2884 2885e. Readline no longer attempts to define its own versions of some ctype 2886 macros if they are implemented as functions in libc but not as macros in 2887 <ctype.h>. 2888 2889f. Fixed a problem where rl_backward could possibly set point to before 2890 the beginning of the line. 2891 2892------------------------------------------------------------------------------ 2893This document details the changes between this version, bash-2.05a-beta1, 2894and the previous version, bash-2.05a-alpha1. 2895 28961. Changes to Bash 2897 2898a. Fixed a bug in the evalution of arithmetic `for' statements when the 2899 expanded expression is NULL. 2900 2901b. Fixed an unassigned variable problem in the redirection printing code. 2902 2903c. Added more prototypes to extern function declarations in the header 2904 files and to static function declarations in C source files. 2905 2906d. Make sure called functions have a prototype in scope, to get the arguments 2907 and return values right instead of casting. Removed extern function 2908 declarations from C source files that were already included in header 2909 files. 2910 2911e. Changed some function arguments to use function typedefs in general.h so 2912 the prototypes can be checked. The only use of Function and VFunction 2913 now is for unwind-protects. 2914 2915f. More const changes to function arguments and appropriate variables. 2916 2917g. Changed the mail checking support to handle `maildir'-style mail 2918 directories. 2919 2920h. Augmented the bash malloc to pass in the file and line number information 2921 for each malloc, realloc, and free. This should result in better error 2922 messages. 2923 2924i. The `old' gnu malloc is no longer a configuration option. 2925 2926j. Augmented the bash malloc with optional tracing and registering allocated 2927 and freed memory. 2928 2929k. Prompt string decoding now saves and restores the value of $? when it 2930 expands the prompt string, so command substitutions don't change $?. 2931 2932i. Array indices are now `long', since shell arithmetic is performed as long, 2933 and the internal arrayind_t type is used consistently. 2934 2935j. Some more `unsigned char *' fixes from Paul Eggert. 2936 2937k. Fixed a bad call to builtin_error that could cause core dumps when making 2938 local variables. 2939 2940l. `return' may no longer be used to terminate a `select' command, for 2941 compatibility with ksh. 2942 2943m. Changed code that reads octal numbers to do a better job of detecting 2944 overflows. 2945 2946n. The time formatting code no longer uses absolute indices into a buffer, 2947 because the buffer size changes depending on the size of a `time_t'. 2948 2949o. `umask' now prints four digits when printing in octal mode, for 2950 compatibility with other shells. 2951 2952p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L' 2953 formats and long doubles better, and internal functions have been 2954 simpified where appropriate. 2955 2956q. Some `time_t' fixes for machines were a time_t is bigger than a long. 2957 2958r. Replaced some bash-specific autoconf macros with standard equivalents. 2959 2960s. Improvmed the code that constructs temporary filenames to make the 2961 generated names a bit more random. 2962 2963t. Added code that checks for ascii before calling any of the is* ctype 2964 functions. 2965 2966u. Changed some places where a `char' was used as an array subscript to use 2967 `unsigned char', since a `char' can be negative if it's signed by default. 2968 2969v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support 2970 for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and 2971 simplify the code. 2972 2973w. `ulimit' now prints the description of a resource in any error message 2974 relating to fetching or setting that resource's limits. 2975 2976x. The `snprintf' replacement now computes maximum values at compile 2977 time rather than using huge constants for things like long long. 2978 2979y. Interactive shells now ignore `set -n'. 2980 2981z. Changed the malloc bookkeeping information so that it's now 8 bytes 2982 instead of 12 on most 32-bit machines (saving 4 bytes per allocation), 2983 restoring 8-byte alignment. 2984 2985aa. The malloc error reporting code now attempts to print the file and line 2986 number of the call that caused the error. 2987 2988bb. Changed the redirection error reporting code to catch EBADF errors and 2989 report the file descriptor number rather than the file being redirected 2990 to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range 2991 file descriptor). 2992 2993cc. `printf', `echo -e', and the $'...' code now process only two hex digits 2994 after a `\x' escape sequence for compatibility with other shells, and 2995 the documentation was changed to note that the octal and hex escape 2996 sequences result in an eight-bit value rather than strict ASCII. 2997 29982. Changes to Readline 2999 3000a. The completion code now attempts to do a better job of preserving the 3001 case of the word the user typed if ignoring case in completions. 3002 3003b. Readline defaults to not echoing the input and lets the terminal 3004 initialization code enable echoing if there is a controlling terminal. 3005 3006c. The key binding code now processes only two hex digits after a `\x' 3007 escape sequence, and the documentation was changed to note that the 3008 octal and hex escape sequences result in an eight-bit value rather 3009 than strict ASCII. 3010 30113. New Features in Bash 3012 3013a. The builtin `ulimit' now takes two new non-numeric arguments: `hard', 3014 meaning the current hard limit, and `soft', meaning the current soft 3015 limit, in addition to `unlimited' 3016 3017b. `ulimit' now prints the option letter associated with a particular 3018 resource when printing more than one limit. 3019 3020c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is 3021 one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively. 3022 30234. New Features in Readline 3024 3025a. New bindable variable `history-preserve-point'. If set, the history 3026 code attempts to place the user at the same location on each history 3027 line retrived with previous-history or next-history. 3028 3029------------------------------------------------------------------------------ 3030This document details the changes between this version, bash-2.05a-alpha1, 3031and the previous version, bash-2.05-release. 3032 30331. Changes to Bash 3034 3035a. Better checks in the redirection code for write errors. 3036 3037b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more 3038 portably. 3039 3040c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD, 3041 MacOS X. 3042 3043d. Some more `const' cleanups through the code. 3044 3045e. Fixed a typo in the /dev/fd redirection code, better checks for valid 3046 numeric fds in /dev/fd. 3047 3048f. Fixed many parts of the shell to handle integer overflow more gracefully 3049 and to do more stringent checks for valid numbers. 3050 3051g. Fixed mksignames to include config.h. 3052 3053h. Fixed an uninitialized variable problem that could cause the shell to core 3054 dump when replacing characters in a string. 3055 3056i. New mechanism for updating the patch level when official patches are 3057 released (patchlevel.h). 3058 3059j. configure.in changed to no longer require external files _distribution and 3060 _patchlevel. 3061 3062k. Fixed non-interactive shell initialization problem when bash started as 3063 `bash -i filename'. 3064 3065l. Fixed printf builtin conversion error handling to be POSIX.2-conformant. 3066 3067m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is 3068 required. Some of the bash-specific macros were removed, since they are 3069 now standard. 3070 3071n. Startup files and files read with source or `.' are no longer required to 3072 be regular files. 3073 3074o. Fixed core dump in builtin printf when user-supplied precision or field 3075 width is 0. 3076 3077p. Fixed builtin printf to treat a negative field width as a positive field 3078 width with left-justification. 3079 3080r. New unwind-protect implementation from Paul Eggert. 3081 3082s. Fixed an inadvertently-unclosed comment in the bash completion code that 3083 caused programmable completions to not add trailing slashes or spaces to 3084 completions. 3085 3086t. Fixed the process substitution code to cope better when stdin is closed. 3087 3088v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in 3089 the shell. 3090 3091w. Fixes from Paul Eggert to avoid most of the type casts in the shell code, 3092 and use more appropriate types for a number of variables. 3093 3094x. Command substition no longer inherits the DEBUG trap. 3095 3096y. Some fixes to the process substition code on machines without /dev/fd so 3097 that named pipes are not removed inappropriately. 3098 3099z. The loadable `getconf' builtin is now much more complete, and will become 3100 part of the shell in the future. 3101 3102aa. The select command no longer terminates on a `return', so it can be used 3103 to return from an enclosing function (as ksh does it). 3104 3105bb. Fixed the extended pattern matching code to behave better when presented 3106 with incorrectly-formed patterns. 3107 3108cc. Some changes were made with the intent of making cross-compilation easier. 3109 3110dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3) 3111 if it's available, which adds support for IPv6. 3112 3113ee. Subshells of login shells no longer source ~/.bash_logout when they exit. 3114 3115ff. Fixes so that subshells don't exit inappropriately if the -e option has 3116 been set. 3117 3118gg. Restricted shells no longer allow functions to be exported. 3119 3120hh. Changes to the pattern matching code so extended pattern matching works 3121 on systems with deficient shared library implementations, like MacOS X. 3122 3123ii. Better error messages when a script with a leading `#!interp' fails 3124 to execute because of problems with `interp'. 3125 3126jj. Fixed `compgen' to handle the `-o default' option better. 3127 3128kk. Fixed the job control code to force an asynchronous process's standard 3129 input to /dev/null only if job control is not active. 3130 3131ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null 3132 pattern) is used to re-execute a previous command. 3133 3134mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an 3135 array variable. Similarly for `declare [-a] var[N]=value'. This is like 3136 ksh93. 3137 3138nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been 3139 declared readonly. 3140 3141oo. Fixed a possible integer overflow problem when constructing names for 3142 temporary files. 3143 31442. New Features in Bash 3145 3146a. Added support for DESTDIR installation root prefix, so you can do a 3147 `make install DESTDIR=bash-root' and do easier binary packaging. 3148 3149b. Added support for builtin printf "'" flag character as per latest POSIX 3150 drafts. 3151 3152c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from 3153 ISO C99). 3154 3155d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications 3156 (bash doesn't use very much of what it returns). 3157 3158e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts, 3159 but ignored. 3160 3161f. New read-only `shopt' option: login_shell. Set to non-zero value if the 3162 shell is a login shell. 3163 3164g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format. 3165 3166h. New `-A group/-g' option to complete and compgen; does group name 3167 completion. 3168 3169i. New `-t' option to `hash' to list hash values for each filename argument. 3170 3171j. New [-+]O invocation option to set and unset `shopt' options at startup. 3172 3173k. configure's `--with-installed-readline' option now takes an optional 3174 `=PATH' suffix to set the root of the tree where readline is installed 3175 to PATH. 3176 3177l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run 3178 whenever the shell would have exited if the -e option were enabled. 3179 It is not inherited by shell functions. 3180 3181m. `readonly', `export', and `declare' now print variables which have been 3182 given attributes but not set by assigning a value as just a command and 3183 a variable name (like `export foo') when listing, as the latest POSIX 3184 drafts require. 3185 3186n. `bashbug' now requires that the subject be changed from the default. 3187 3188o. configure has a new `--enable-largefile' option, like other GNU utilities. 3189 3190p. `for' loops now allow empty word lists after `in', like the latest POSIX 3191 drafts require. 3192 31933. Changes to Readline 3194 3195a. More `const' and type casting fixes. 3196 3197b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer 3198 overflow problems. 3199 3200c. The completion code no longer appends a `/' or ` ' to a match when 3201 completing a symbolic link that resolves to a directory name, unless 3202 the match does not add anything to the word being completed. This 3203 means that a tab will complete the word up to the full name, but not 3204 add anything, and a subsequent tab will add a slash. 3205 3206d. Fixed a trivial typo that made the vi-mode `dT' command not work. 3207 3208e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert. 3209 3210f. Fixed the tty code so that ^V works more than once. 3211 3212g. Changed the use of __P((...)) for function prototypes to PARAMS((...)) 3213 because the use of __P in typedefs conflicted g++ and glibc. 3214 32154. New Features in Readline 3216 3217a. Added extern declaration for rl_get_termcap to readline.h, making it a 3218 public function (it was always there, just not in readline.h). 3219 3220b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402, 3221 RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2. 3222 3223c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION. 3224 3225d. New bindable boolean readline variable: match-hidden-files. Controls 3226 completion of files beginning with a `.' (on Unix). Enabled by default. 3227 3228e. The history expansion code now allows any character to terminate a 3229 `:first-' modifier, like csh. 3230 3231f. The incremental search code remembers the last search string and uses 3232 it if ^R^R is typed without a search string. 3233 3234------------------------------------------------------------------------------ 3235This document details the changes between this version, bash-2.05-release, 3236and the previous version, bash-2.05-beta2. 3237 32381. Changes to Bash 3239 3240a. Make sure we note that the first line of a multi-line command was not 3241 saved in the history if the tests for HISTCONTROL succeed, but the 3242 HISTIGNORE check fails. 3243 3244b. Fixed a bug in the pattern matching code that caused `[' to be treated 3245 as a special character inside a `[...]' bracket expression. 3246 3247c. Fixed a bug in the pattern matching code that caused `]' to terminate 3248 a bracket expression even if it was the first character after the `[' 3249 (or a leading `!' or `^'). 3250 3251d. Made a small change to report a more user-friendly error message if 3252 execve(2) fails because of an error with the interpreter in a script 3253 with a leading `#! interpreter'. 3254 3255e. If the OS does not support an exec(2) magic number of `#!', make sure we 3256 have a non-null interpreter name before attempting to execute it. 3257 3258f. Fixed a bug that caused the shell process to end up in a different 3259 process group than the controlling terminal if a job-control shell was 3260 run with `exec' in the startup files. 3261 3262g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or 3263 `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set. 3264 3265h. Fixed a problem that caused the `\W' prompt string escape sequence to 3266 expand to nothing when $PWD was `//'. 3267 3268i. The `bashbug' shell script no longer uses $(...) command substitution. 3269 3270j. When `set' is invoked without options in POSIX mode, it no longer prints 3271 the names and definitions of shell functions. 3272 32732. Changes to Readline 3274 3275a. rl_set_paren_blink_timeout() is now documented. 3276 3277b. Corrected history.3 man page: `$' is not in the default value of 3278 history_word_delimiters. 3279 3280c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero 3281 value, rl_read_key() now immediately returns '\n' (which is assumed to 3282 be bound to accept-line). 3283 32843. New Features in Bash 3285 3286a. The `>&word' redirection now works in POSIX mode as it does by default, 3287 since POSIX.2 leaves it unspecified. 3288 3289------------------------------------------------------------------------------ 3290This document details the changes between this version, bash-2.05-beta2, 3291and the previous version, bash-2.05-beta1. 3292 32931. Changes to Bash 3294 3295a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported. 3296 3297b. Fixed startup so posixly_correct is retained across subshells begun to 3298 execute scripts without a leading `#!'. 3299 3300c. Fixed a bug that caused $(< file) to not work in a (...) subshell. 3301 3302d. Added config support for Linux running on the IBM S390. 3303 3304e. Fixed a bug that caused bash to get its input pointer out of sync when 3305 reading commands through a pipe and running a command with standard 3306 input redirected from a file. 3307 3308f. Made a change so that command completion now makes about half as many 3309 stat(2) calls when searching the $PATH. 3310 3311g. Fixed a bug that caused variable assignments preceding `return' to not 3312 be propagated to the shell environment in POSIX mode. 3313 3314h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed 3315 on `word'. 3316 3317i. In POSIX mode, `break' and `continue' do not complain and return success 3318 if called when the shell is not executing a loop. 3319 3320j. Fixed `bash -o posix' to work the same as `bash --posix'. 3321 3322k. Fixed a bug where variable assignments preceding `eval' or `source/.' 3323 would not show up in the environment exported to subshells run by the 3324 commands. 3325 3326l. In POSIX mode, shells started to execute command substitutions inherit 3327 the value of the `-e' option from their parent shell. 3328 3329m. In POSIX mode, aliases are expanded even in non-interactive shells. 3330 3331n. Changed some of the job control messages to display the text required by 3332 POSIX.2 when the shell is in POSIX mode. 3333 3334o. Fixed a bug in `test' that caused it to occasionally return incorrect 3335 results when non-numeric arguments were supplied to `-t'. 3336 33372. Changes to Readline 3338 3339a. Some changes were made to avoid gcc warnings with -Wall. 3340 3341b. rl_get_keymap_by_name now finds keymaps case-insensitively, so 3342 `set keymap EMACS' works. 3343 3344c. The history file writing and truncation functions now return a useful 3345 status on error. 3346 3347d. Fixed a bug that could cause applications to dereference a NULL pointer 3348 if a NULL second argument was passed to history_expand(). 3349 33503. New Features in Bash 3351 3352a. doc/readline.3 has been moved to the readline distribution. 3353 33544. New Features in Readline 3355 3356a. New function, rl_get_screen_size (int *rows, int *columns), returns 3357 readline's idea of the screen dimensions. 3358 3359b. The timeout in rl_gather_tyi (readline keyboard input polling function) 3360 is now settable via a function (rl_set_keyboard_input_timeout()). 3361 3362c. Renamed the max_input_history variable to history_max_entries; the old 3363 variable is maintained for backwards compatibility. 3364 3365d. The list of characters that separate words for the history tokenizer is 3366 now settable with a variable: history_word_delimiters. The default 3367 value is as before. 3368 3369------------------------------------------------------------------------------ 3370This document details the changes between this version, bash-2.05-beta1, 3371and the previous version, bash-2.05-alpha1. 3372 33731. Changes to Bash 3374 3375a. Changes to allow shared library and object building on the GNU Hurd. 3376 3377b. Fixes to the way exported functions are placed into the environment and 3378 cached. 3379 3380c. The globbing library once again respects locales when processing ranges 3381 in bracket expressions while doing pattern matching. 3382 3383d. System-specific configuration changes for: Tru 64, Interix 3384 3385e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and 3386 will use mktemp(1) or tempfile(1), if present, for temporary file creation. 3387 3388f. Bash no longer performs a binary file check on a script argument that's 3389 really a tty (like /dev/fd/0 or /dev/stdin). 3390 3391g. Fixed a bug in the execution of shell scripts that caused the effects of 3392 $BASH_ENV to be undone in some cases. 3393 3394h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly. 3395 3396i. Several changes to the job control code to avoid some signal state 3397 manipulation. 3398 3399j. The Bash malloc no longer blocks signals as often, which should make it 3400 faster. 3401 3402k. Fixed a parsing bug that did not allow backslash to escape a single quote 3403 inside a $'...' construct. 3404 3405l. Fixed a bug that caused things like ${var:=$'value'} to be parsed 3406 incorrectly. This showed up in newer versions of autoconf. 3407 3408m. Fixed a bug in the bash-specific readline initialization that caused 3409 key bindings to bash-specific function names appearing in .inputrc to 3410 not be honored. 3411 3412n. Bash now sets the file descriptor it uses to save the file descriptor 3413 opened on a shell script to close on exec. 3414 3415o. Fixed a bug in the prompt string decoding that caused it to misbehave 3416 when presented an octal sequence of fewer than three characters. 3417 3418p. Fixed the `test' builtin to return an error if `[' is supplied a single 3419 argument that is not `]'. 3420 3421q. Fixed a bug that caused subshells started to run executable shell scripts 3422 without a leading `#!' to incorrectly inherit an argument list preceding 3423 a shell builtin (like such a script called from a script sourced with `.', 3424 where there were variable assignments preceding the `.' command) 3425 3426r. Fixed a bug that caused changes to variables supplied in an assignment 3427 statement preceding a shell builtin to not be honored (like a script 3428 run with `.'). 3429 3430s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values 3431 when the shell is started. 3432 3433t. Fixed a bug that caused SIGINT to kill shell scripts after the script 3434 called `wait'. 3435 3436u. The `fc' builtin now tries to create its temporary files in the directory 3437 named by $TMPDIR. 3438 3439v. Bash no longer calls any Readline functions or uses any Readline variables 3440 not declared in readline.h. 3441 3442w. Fixed a bug that caused some substitutions involving $@ to not be split 3443 correctly, especially expansions of the form ${paramterOPword}. 3444 3445x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it 3446 appears in the initial environment. 3447 3448y. Fixed a couple of problems with shell scripts without a leading `#!' 3449 being executed out of shell functions that could cause core dumps if 3450 such a script attempted to execute `return'. 3451 3452z. Fixed a problem with the `-nt' and `-ot' binary operators for the 3453 `test/[' builtin and the `[[' conditional command that caused wrong 3454 return values if one of the file arguments did not exist. 3455 3456aa. Fixed a bug that caused non-interactive shells which had previously 3457 executed `shopt -s expand_aliases' to fail to expand aliases in a 3458 command like `(command) &'. 3459 34602. Changes to Readline 3461 3462a. Changes to make most (but not yet all -- there is still crlf()) of the 3463 exported readline functions declared in readline.h have an rl_ prefix. 3464 3465b. More `const' changes in function arguments, mostly for completion 3466 functions. 3467 3468c. Fixed a bug in rl_forward that could cause the point to be set to before 3469 the beginning of the line in vi mode. 3470 3471d. Fixed a bug in the callback read-char interface to make it work when a 3472 readline function pushes some input onto the input stream with 3473 rl_execute_next (like the incremental search functions). 3474 3475e. Fixed a file descriptor leak in the history file manipulation code that 3476 was tripped when attempting to truncate a non-regular file (like 3477 /dev/null). 3478 3479f. Some existing variables are now documented and part of the public 3480 interface (declared in readline.h): rl_explict_arg, rl_numeric_arg, 3481 rl_editing_mode, rl_last_func. 3482 3483g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and 3484 crlf to rl_crlf, so there are no public functions declared in readline.h 3485 without an `rl_' prefix. The old functions still exist for backwards 3486 compatibility. 3487 34883. New Features in Bash 3489 3490a. A new loadable builtin, realpath, which canonicalizes and expands symlinks 3491 in pathname arguments. 3492 3493b. When `set' is called without options, it prints function defintions in a 3494 way that allows them to be reused as input. This affects `declare' and 3495 `declare -p' as well. 3496 34974. New Features in Readline 3498 3499a. New application-callable function rl_set_prompt(const char *prompt): 3500 expands its prompt string argument and sets rl_prompt to the result. 3501 3502b. New application-callable function rl_set_screen_size(int rows, int cols): 3503 public method for applications to set readline's idea of the screen 3504 dimensions. 3505 3506c. The history example program (examples/histexamp.c) is now built as one 3507 of the examples. 3508 3509------------------------------------------------------------------------------ 3510This document details the changes between this version, bash-2.05-alpha1, 3511and the previous version, bash-2.04-release. 3512 35131. Changes to Bash 3514 3515a. A fix was made to allow newlines in compond array assignments. 3516 3517b. configure now checks for real-time signals with unusable values. 3518 3519c. Interactive shells no longer exit if a substitution fails because of an 3520 unset variable within a sourced file. 3521 3522d. Fixed a problem with incorrect matching of extended glob patterns when 3523 doing pattern substitution. 3524 3525e. `{' is now quoted by the completion code when it appears in a filename. 3526 3527f. Fixed an error in pattern matching that caused the matcher to not 3528 correctly skip the rest of a bracket expression after a character 3529 matched. 3530 3531g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS 3532 character preceded by IFS whitespace part of the current delimiter rather 3533 than generating a separate field. 3534 3535h. The {!prefix@} expansion now generates separate words, analogous to $@, 3536 when double-quoted. 3537 3538i. Command substitution now ignores NUL bytes in the command output, and the 3539 parser ignores them on input. 3540 3541j. A fix was made to the job control code to prevent hanging processes when 3542 the shell thinks background processes are running but the kernel returns 3543 -1/ECHILD from waitpid(). 3544 3545k. `pwd' now prints an error message if the write fails when displaying the 3546 current directory. 3547 3548l. When in POSIX mode, the shell prints trap dispostions without a leading 3549 `SIG' in the signal specification. 3550 3551m. Fixed a parser bug that caused the current command's line count to be 3552 messed up by a compound array assignment. 3553 3554n. Fixed a bug in the unwind-protect code that caused bad behavior on machines 3555 where ints and pointers are not the same size. 3556 3557o. System-specific configure changes for: MacOS X. 3558 3559p. Changes for Cygwin to translate \r\n and \r to \n and to set file 3560 descriptors used for reading input to text mode in various places. 3561 3562q. Fixed a bug that caused `!' to occasionally not be honored when in 3563 a (...) subshell. 3564 3565r. Bash no longer assumes that getcwd() will return any useful error message 3566 in the buffer passed as an argument if the call fails. 3567 3568s. The `source', `.', and `fc' builtins no longer check whether a file is 3569 binary before reading commands from it. 3570 3571t. Subshells no longer turn off job control when they exit, since that 3572 sometimes resulted in the terminal being reset to the wrong process 3573 group. 3574 3575u. The history code no longer tries to save the second and subsequent lines 3576 of a multi-line command if the first line was not saved. 3577 3578v. The history saving code now does a better job of saving blank lines in a 3579 multi-line command. 3580 3581w. Removed a `feature' that made `ulimit' silently translate `unlimited' to 3582 the current hard limit, which obscured some kernel error returns. 3583 3584x. Fixed the grammar so that `}' is recognized as a reserved word after 3585 another reserved word, rather than requiring a `;' or newline. This 3586 means that constructs like 3587 3588 { { echo a b c ; } } 3589 3590 work as expected. 3591 3592y. Conditional commands ([[...]]) now perform tilde expansion on their 3593 arguments. 3594 3595z. Noted in the documentation that `set -a' will cause functions to be 3596 exported if they are defined after `set -a' is executed. 3597 3598aa. When an interactive login shell starts, if $PWD and $HOME refer to the 3599 same directory but are not the same string, $PWD is set to $HOME. 3600 3601bb. Fixed `printf' to handle invalid floating point numbers better. 3602 3603cc. Temporary files are now created with random filenames, to improve security. 3604 3605dd. The readline initialization code now binds the custom bash functions and 3606 key bindings after the readline defaults are set up. 3607 3608ee. Fixed the `source' builtin to no longer overwrite a shell function's 3609 argument list, even if the sourced file changes the positional parameters. 3610 3611ff. A bug fix was made in the expansion of `$*' in contexts where it should 3612 not be split, like assignment statements. 3613 3614gg. Fixed a bug in the parameter substring expansion to handle conditional 3615 arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression 3616 off at the wrong `:'. 3617 3618hh. The `<>' redirection is no longer subject to the current setting of 3619 `noclobber', as POSIX.2 specifies. 3620 3621ii. Fixed a bug in the conditional command parsing code that caused expressions 3622 in parentheses to occasionally be parsed incorrectly. 3623 3624jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or 3625 {...} to follow the )) without an intervening list terminator. 3626 3627kk. `printf' now treats `\E' the same as `\e' when performing backslash escape 3628 expansion for the `%b' format specifier. 3629 3630ll. When in POSIX mode, the shell no longer searches the current directory for 3631 a file to be sourced with `.' or `source' if `.' is not in $PATH. 3632 3633mm. Interactive comments are no longer turned off when POSIX mode is disabled. 3634 3635nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's 3636 environment when it starts up. 3637 3638oo. Fixed a bug in the `command' builtin so the effect of a command like 3639 `command exec 4<file' is as if the `command' had been omitted. 3640 3641pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array 3642 variable. 3643 3644qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not 3645 an array variable. 3646 3647rr. The shell's idea of an absolute pathname now takes into account a 3648 possible drive specification on Cygwin and other Windows systems. 3649 3650ss. Fixed a bug which caused incorrect parsing of some multi-character 3651 constructs if they were split across input lines with backslash-newline 3652 line continuation. 3653 3654tt. Fixed a bug that caused restricted shell mode to be set inappropriately 3655 when trying to execute a shell script without a leading `#!'. 3656 3657uu. Shell function definitions no longer require that the body be a group 3658 command ( {...} ), as POSIX.2 requires. 3659 3660vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally 3661 and should require many fewer calls to getcwd(). 3662 3663ww. Fixed a bug that caused a pipeline's process group to be set incorrectly 3664 if one of the pipeline elements contained a command substitution. 3665 3666xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE. 3667 3668yy. The output of `set' is now quoted using $'...' so invisible characters are 3669 displayed as escape sequences. 3670 3671zz. Fixed the help text for `unset', since PATH and IFS may both be unset. 3672 3673aaa. The shell no longer puts directory names into the command hash table. 3674 3675bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if 3676 it was interrupted after reading a large amount of data. 3677 3678ccc. Assignment statements that attempt to assign values to readonly variables 3679 now cause the command to return an error status. 3680 3681ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was 3682 interrupted. 3683 3684eee. GROUPS and FUNCNAME now return an error status when assignment is 3685 attempted, but may be unset (in which case they lose their special 3686 properties). In all respects except unsetting, they are readonly. 3687 3688fff. The string-to-integer conversion code now ignores trailing whitespace in 3689 the string, even if strtol(3) does not. 3690 3691ggg. The tcsh magic-space function now does a better job of inserting the 3692 space close to where the point was before the history expansion, rather 3693 than just appending it. 3694 3695hhh. Fixed a bug which caused a file sourced from an interactive shell to 3696 fill up the jobs table if it ran lots of jobs. 3697 3698iii. Fixed a bug in the parameter pattern substitution code to avoid infinite 3699 recursion on zero-length matches. 3700 37012. Changes to Readline 3702 3703a. When setting the terminal attributes on systems using `struct termio', 3704 readline waits for output to drain before changing the attributes. 3705 3706b. A fix was made to the history word tokenization code to avoid attempts to 3707 dereference a null pointer. 3708 3709c. Readline now defaults rl_terminal_name to $TERM if the calling application 3710 has left it unset, and tries to initialize with the resultant value. 3711 3712d. Instead of calling (*rl_getc_function)() directly to get input in certain 3713 places, readline now calls rl_read_key() consistently. 3714 3715e. Fixed a bug in the completion code that allowed a backslash to quote a 3716 single quote inside a single-quoted string. 3717 3718f. rl_prompt is no longer assigned directly from the argument to readline(), 3719 but uses memory allocated by readline. This allows constant strings to 3720 be passed to readline without problems arising when the prompt processing 3721 code wants to modify the string. 3722 3723g. Fixed a bug that caused non-interactive history searches to return the 3724 wrong line when performing multiple searches backward for the same string. 3725 3726h. Many variables, function arguments, and function return values are now 3727 declared `const' where appropriate, to improve behavior when linking with 3728 C++ code. 3729 3730i. The control character detection code now works better on systems where 3731 `char' is unsigned by default. 3732 3733j. The vi-mode numeric argument is now capped at 999999, just like emacs mode. 3734 3735k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been 3736 replaced with a set of specific prototyped typedefs, though they are 3737 still in the readline header files for backwards compatibility. 3738 3739m. Nearly all of the (undocumented) internal global variables in the library 3740 now have an _rl_ prefix -- there were a number that did not, like 3741 screenheight, screenwidth, alphabetic, etc. 3742 3743n. The ding() convenience function has been renamed to rl_ding(), though the 3744 old function is still defined for backwards compatibility. 3745 3746o. The completion convenience functions filename_completion_function, 3747 username_completion_function, and completion_matches now have an rl_ 3748 prefix, though the old names are still defined for backwards compatibility. 3749 3750p. The functions shared by readline and bash (linkage is satisfied from bash 3751 when compiling with bash, and internally otherwise) now have an sh_ prefix. 3752 3753q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so 3754 that the `soname' contains only the major version number rather than the 3755 major and minor numbers. 3756 3757r. Fixed a redisplay bug that occurred when the prompt spanned more than one 3758 physical line and contained invisible characters. 3759 37603. New Features in Bash 3761 3762a. Added a new `--init-file' invocation argument as a synonym for `--rcfile', 3763 per the new GNU coding standards. 3764 3765b. The /dev/tcp and /dev/udp redirections now accept service names as well as 3766 port numbers. 3767 3768c. `complete' and `compgen' now take a `-o value' option, which controls some 3769 of the aspects of that compspec. Valid values are: 3770 3771 default - perform bash default completion if programmable 3772 completion produces no matches 3773 dirnames - perform directory name completion if programmable 3774 completion produces no matches 3775 filenames - tell readline that the compspec produces filenames, 3776 so it can do things like append slashes to 3777 directory names and suppress trailing spaces 3778 37794. New Features in Readline 3780 3781a. The blink timeout for paren matching is now settable by applications. 3782 3783b. _rl_executing_macro has been renamed to rl_executing_macro, which means 3784 it's now part of the public interface. 3785 3786c. Readline has a new variable, rl_readline_state, which is a bitmap that 3787 encapsulates the current state of the library; intended for use by 3788 callbacks and hook functions. 3789 3790------------------------------------------------------------------------------ 3791This document details the changes between this version, bash-2.04-release, 3792and the previous version, bash-2.04-beta5. 3793 37941. Changes to Bash 3795 3796a. Better compile-time and configure-time checks for the necessity of 3797 inet_aton(). 3798 3799b. A bug was fixed in the expansion of "${@:-}" when there are positional 3800 parameters. 3801 3802c. A typo was fixed in the output of `complete'. 3803 3804d. The matches generated for a word by the `-W' argument to complete and 3805 compgen are now matched against the word being completed, and only 3806 matches are returned as the result. 3807 3808e. Some fixes were made for systems which do not restart read(2) when a 3809 signal caught by bash is received. 3810 3811f. A bug was fixed which caused the umask to be set to 0 when an invalid 3812 symbolic mode mask was parsed. 3813 3814g. Fixed a bug that could cause a core dump if a SIGCHLD was received while 3815 performing an assignment statement using command substitution. 3816 3817h. Changed the word splitting function for programmable completion so cases 3818 in which the cursor is between words are handled a bit better. 3819 38202. Changes to Readline 3821 3822a. rl_funmap_names() is now documented. 3823 38243. New Features in Bash 3825 3826a. The LC_NUMERIC variable is now treated specially, and used to set the 3827 LC_NUMERIC locale category for number formatting, e.g., when `printf' 3828 displays floating-point numbers. 3829 3830------------------------------------------------------------------------------ 3831This document details the changes between this version, bash-2.04-beta5, 3832and the previous version, bash-2.04-beta4. 3833 38341. Changes to Bash 3835 3836a. A couple of changes were made to the Makefiles for easier building on 3837 non-Unix systems. 3838 3839b. Fixed a bug where the current prompt would be set to $PS2 at startup. 3840 3841c. The shell script that tests an already-installed version was changed to 3842 remove the directory it created its test programs in at exit. 3843 3844d. Several changes were made to the code that tokenizes an input line for 3845 the programmable completion code. Shell metacharacters will now appear 3846 as individual words in the word list passed to the completion functions. 3847 Some of the example completion shell functions were changed to understand 3848 redirection operators. 3849 3850e. A bug was fixed that, under obscure circumstances, could confuse the 3851 parser when a shell function was run by the programmable completion code. 3852 3853f. A bug was fixed in the ulimit builtin for systems not using getrlimit(). 3854 3855g. The execution code now propagates the correct exit status back to the rest 3856 of the code if the return value of a subshell command was being inverted. 3857 Some new test cases for inverting return values with the `!' reserved 3858 word have been added. 3859 3860h. Negative exponents in the arithmetic evaluation of v**e now return an 3861 evaluation error. 3862 3863i. A bug that caused bash to check the wrong process in a pipeline for 3864 abnormal termination (and consequently resetting the terminal attributes) 3865 was fixed. 3866 3867j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was 3868 executed. 3869 38702. Changes to Readline 3871 38721. Fixed a bug in a C preprocessor define that caused the keypad control 3873 functions to be compiled out for all platforms except DJGPP. 3874 3875------------------------------------------------------------------------------ 3876This document details the changes between this version, bash-2.04-beta4, 3877and the previous version, bash-2.04-beta3. 3878 38791. Changes to Bash 3880 3881a. A couple of changes were made to the redirection to attempt to avoid 3882 race conditions and malicious file replacement. 3883 38842. A change was made to the string evaluation code (used for command 3885 substitution, `eval', and the `.' builtin) to fix an obscure core 3886 dump on alpha machines. 3887 38883. A bug that caused $LINENO to be wrong when executing arithmetic for 3889 commands was fixed. 3890 38914. A couple of memory leaks in the programmable completion code were fixed. 3892 38935. A bug that could cause a core dump by freeing memory twice during a call 3894 to `eval' if `set -u' had been enabled and an undefined variable was 3895 referenced was fixed. 3896 3897------------------------------------------------------------------------------ 3898This document details the changes between this version, bash-2.04-beta3, 3899and the previous version, bash-2.04-beta2. 3900 39011. Changes to Bash 3902 3903a. Bash should run the appropriate startup files when invoked by ssh2. 3904 3905b. Fixed a bug in the parsing of conditional commands that could cause a 3906 core dump. 3907 3908c. Fixed a bug in parsing job specifications that occasionally caused 3909 core dumps when an out-of-range job was referenced. 3910 3911d. Fixed the `type' and `command' builtins to do better reporting of 3912 commands that are not found in $PATH or the hash table. 3913 3914e. Fixed a POSIX.2 compliance problem in the command builtin -- commands 3915 are supposed to be reported as full pathnames. 3916 3917f. The `echo' builtin now returns failure if a write error occurs. 3918 3919g. Fixed a bug which caused the locale to not be reset correctly when 3920 LC_ALL was unset. 3921 3922h. Changed description of `getopts' in man page and reference manual to make 3923 it clear that option characters may be characters other than letters. 3924 3925i. If the shell exits while in a function, make sure that any trap on EXIT 3926 doesn't think the function is still executing. 3927 3928j. Bashbug now tries harder to find a usable editor if $EDITOR is not set, 3929 rather than simply defaulting to `emacs'. 3930 3931k. Changes to the scripts that guess and canonicalize the system type, from 3932 the latest `automake' distribution via Debian. 3933 3934l. When using named pipes for process substitution, make sure the file 3935 descriptors opened for reading are set to non-blocking mode. 3936 3937m. Fixed a bug that caused termination of pipelines that are killed by a 3938 signal to not be reported in some cases. 3939 3940n. When not in literal-history mode, shell comment lines are not added to 3941 the history list. 3942 3943o. When running in POSIX.2 mode, bash no longer performs word splitting on 3944 the expanded value of the word supplied as the filename argument to 3945 redirection operators. 3946 3947p. The prompt string decoding code now backslash-quotes only characters that 3948 are special within double quotes when expanding the \w and \W escape 3949 sequences. 3950 3951q. Fixed a bug in the prompt decoding code that could cause a non-interactive 3952 shell to seg fault if `\u' was used in PS4 and the shell was in xtrace 3953 mode. 3954 3955r. Fixed a bug that caused function definitions to be printed with any 3956 redirections that should be attached to the entire function before the 3957 closing brace. 3958 3959s. Changed the tilde expansion code for Cygwin systems to avoid creating 3960 pathnames beginning with `//' if $HOME == `/'. 3961 3962t. Fixed a couple of autoconf tests to avoid creating files with fixed names 3963 in /tmp. 3964 3965u. The `trap' and `kill' builtins now know the names of the POSIX.1b real- 3966 time signals on systems which support them. 3967 39682. Changes to Readline 3969 3970a. Fixed a problem with the single-quote quoting function that could cause 3971 buffer overflows. 3972 3973b. Fixed a bug that caused incorrect `stat characters' to be printed if 3974 the files being completed were in the root directory and visible-stats 3975 was enabled. 3976 39773. New Features in Bash 3978 3979a. There is a new `rbash.1' manual page, from the Debian release. 3980 3981b. The `--enable-usg-echo-default' option to `configure' has been renamed to 3982 `--enable-xpg-echo-default'. The old option is still there for backwards 3983 compatibility. 3984 3985------------------------------------------------------------------------------ 3986This document details the changes between this version, bash-2.04-beta2, 3987and the previous version, bash-2.04-beta1. 3988 39891. Changes to Bash 3990 3991a. Fixed a bug that could cause pipes to be closed inappropriately in 3992 some obscure cases. 3993 3994b. Fixed a bug that caused creation of the exported environment to clobber 3995 the current command string if there were any exported shell functions. 3996 3997c. Some changes were made to reduce bash's memory usage. 3998 3999d. Fixed a problem with programmable completion and filenames to be 4000 completed containing quote characters. 4001 4002e. Changed the code the removes named pipes created for the <(...) and >(...) 4003 expansions to defer removal until after any current shell function has 4004 finished executing. 4005 4006f. Fixed a bug in `select' which caused it to not handle the `continue' 4007 builtin correctly. 4008 4009g. Autoconf tests added for cygwin32 and mingw32. 4010 40112. New Features in Bash 4012 4013a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc' 4014 (which is still there for backwards compatibility). 4015 4016------------------------------------------------------------------------------ 4017This document details the changes between this version, bash-2.04-beta1, 4018and the previous version, bash-2.04-alpha1. 4019 40201. Changes to Bash 4021 4022a. Fixed a bug in the programmable completion code that occurred when 4023 trying to complete command lines containing a `;' or `@'. 4024 4025b. The file descriptor from which the shell is reading a script is now 4026 moved to a file descriptor above the user-addressible range. 4027 4028c. Changes to `printf' so that it can handle integers beginning with 0 4029 or 0x as octal and hex, respectively. 4030 4031d. Fixes to the programmable completion code so it handles nonsense like 4032 `compgen -C xyz' gracefully. 4033 4034e. The shell no longer modifies the signal handler for SIGPROF, allowing 4035 profiling again on certain systems. 4036 4037f. The shell checks for a new window size, if the user has requested it, 4038 after a process exits due to a signal. 4039 4040g. Fixed a bug with variables with null values in a program's temporary 4041 environment and the bash getenv() replacement. 4042 4043h. `declare' and the other builtins that take variable assignments as 4044 arguments now honor `set -a' and mark modified variables for export. 4045 4046i. Some changes were made for --dump-po-strings mode when writing strings 4047 with embedded newlines. 4048 4049j. The code that caches export strings from the initial environment now 4050 duplicates the string rather than just pointing into the environment. 4051 4052k. The filename completion quoting code now uses single quotes by default 4053 if the filename being completed contains newlines, since \<newline> 4054 has a special meaning to the parser. 4055 4056l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and 4057 u_int32_t, respectively to avoid conflicts on certain Unix versions. 4058 4059m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x. 4060 4061n. Fixed a problem with hostname-to-ip-address translation in the 4062 /dev/(tcp|udp)/hostname/port redirection code. 4063 4064o. The texinfo manual has been reorganized slightly. 4065 4066p. Filename generation (globbing) range comparisons in bracket expressions 4067 no longer use strcoll(3) even if it is available, since it has unwanted 4068 effects in certain locales. 4069 4070q. Fixed a cosmetic problem in the source that caused the shell to not 4071 compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was. 4072 4073r. Fixed a bug in the here-document code tripped when the file descriptor 4074 opened to the file containing the text of the here document was the 4075 same as a redirector specified by the user. 4076 4077s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline' 4078 in `time ! pipeline'. 4079 4080t. Fixed a bug with the `wait' builtin which manifested itself when an 4081 interrupt was received while the shell was waiting for asynchronous 4082 processes in a shell script. 4083 4084u. Fixed the DEBUG trap code so that it has the correct value of $?. 4085 4086v. Fixed a bug in the parameter pattern substitution code that could cause 4087 the shell to attempt to free unallocated memory if the pattern started 4088 with `/' and an expansion error occurs. 4089 4090w. Fixed a bug in the positional parameter substring code that could 4091 cause the shell to loop freeing freed memory. 4092 4093x. Fixed a bug in the positional parameter pattern substitution code so 4094 that it correctly handles null replacement strings with a pattern 4095 string prefixed with `%' or `#'. 4096 4097y. The shell no longer attempts to import functions from the environment if 4098 started with `-n'. 4099 4100z. Fixed a bug that caused `return' in a command substitution executed in 4101 a shell function to return from the function in a subshell and continue 4102 execution. 4103 4104aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell 4105 is restricted. 4106 4107bb. The wait* job control functions now behave better if called when there 4108 are no unwaited-for children. 4109 4110cc. Command substitution no longer unconditionally disables job control in 4111 the subshell started to run the command. 4112 4113dd. A bug was fixed that occasionally caused traps to mess up the parser 4114 state. 4115 4116ee. `bashbug' now honors user headers in the mail message it sends. 4117 4118ff. A bug was fixed that caused the `:p' history modifier to not print the 4119 history expansion if the `histverify' option was set. 4120 41212. Changes to Readline 4122 4123a. Fixed a bug in the redisplay code for lines with more than 256 line 4124 breaks. 4125 4126b. A bug was fixed which caused invisible character markers to not be 4127 stripped from the prompt string if the terminal was in no-echo mode. 4128 4129c. Readline no longer tries to get the variables it needs for redisplay 4130 from the termcap entry if the calling application has specified its 4131 own redisplay function. Readline treats the terminal as `dumb' in 4132 this case. 4133 4134d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape 4135 sequences is redrawn correctly. 4136 41373. New Features in Bash 4138 4139a. `bashbug' now accepts `--help' and `--version' options. 4140 4141b. There is a new `xpg_echo' option to `shopt' that controls the behavior 4142 of echo with respect to backslash-escaped characters at runtime. 4143 4144------------------------------------------------------------------------------ 4145This document details the changes between this version, bash-2.04-alpha1, 4146and the previous version, bash-2.04-devel. 4147 41481. Changes to Bash 4149 4150a. Fixed a bug that could cause core dumps when performing substring 4151 expansion. 4152 4153b. Shared object configuration changes for: Solaris, OSF/1 4154 4155c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities 4156 for pathname expansion now understands GLOBIGNORE. 4157 4158d. The code that implements `eval' was changed to save the value of the 4159 current prompt, so an eval in a shell function called by the programmable 4160 completion code will not change the prompt to $PS2. 4161 4162e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to 4163 config-top.h. If this is defined, all login shells will read the 4164 startup files, not just interactive and non-interactive started with 4165 the `--login' option. 4166 4167f. Fixed a bug that caused the expansion code to occasionally dump core if 4168 IFS contained characters > 128. 4169 4170g. Fixed a problem with the grammar so that a newline is not required 4171 after the `))' in the new-style arithmetic for statement; a semicolon 4172 may be used as expected. 4173 4174h. Variable indirection may now reference the shell's special variables. 4175 4176i. The $'...' and $"..." constructs are now added to the history correctly 4177 if they contain newlines and command-oriented history is enabled. 4178 4179j. It is now an error to try to assign a value to a function-local copy 4180 of a readonly shell variable (declared with the `local' builtin). 4181 41822. Changes to Readline 4183 4184a. The history file code now uses O_BINARY mode when reading and writing 4185 the history file on cygwin32. 4186 41873. New Features in Bash 4188 4189a. A new programmable completion facility, with two new builtin commands: 4190 complete and compgen. 4191 4192b. configure has a new option, `--enable-progcomp', to compile in the 4193 programmable completion features (enabled by default). 4194 4195c. `shopt' has a new option, `progcomp', to enable and disable programmable 4196 completion at runtime. 4197 4198d. Unsetting HOSTFILE now clears the list of hostnames used for completion. 4199 42004. New Features in Readline 4201 4202a. A new variable, rl_gnu_readline_p, always 1. The intent is that an 4203 application can verify whether or not it is linked with the `real' 4204 readline library or some substitute. 4205 4206------------------------------------------------------------------------------ 4207This document details the changes between this version, bash-2.04-devel, 4208and the previous version, bash-2.03-release. 4209 42101. Changes to Bash 4211 4212a. System-specific configuration and source changes for: Interix, Rhapsody 4213 4214b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if 4215 JOB_CONTROL was not defined. 4216 4217c. An obscure race condition in the trap code was fixed. 4218 4219d. The string resulting from $'...' is now requoted to avoid any further 4220 expansion. 4221 4222e. The $'...' quoting syntax now allows backslash to escape a single quote, 4223 for ksh-93 compatibility. 4224 4225f. The $"..." quoting syntax now escapes backslashes and double quotes in 4226 the translated string when displaying them with the --dump-po-strings 4227 option. 4228 4229g. `echo -e' no longer converts \' to '. 4230 4231h. Fixes were made to the extended globbing code to handle embedded (...) 4232 patterns better. 4233 4234i. Some improvements were made to the code that unsets `nodelay' mode on 4235 the file descriptor from which bash is reading input. 4236 4237j. Some changes were made to the replacement termcap library for better 4238 operation on MS-DOS. 4239 4240k. Some changes were made to the tilde expansion code to handle backslash 4241 as a pathname separator on MS-DOS. 4242 4243l. The source has been reorganized a little bit -- there is now an `include' 4244 subdirectory, and lib/posixheaders has been removed. 4245 4246m. Improvements were made to the `read' builtin so that it makes many 4247 fewer read(2) system calls. 4248 4249n. The expansion of $- will include `c' and `s' when those options are 4250 supplied at shell invocation. 4251 4252o. Several improvments were made to the completion code: variable completion 4253 now works better when there are unterminated expansions, command 4254 completion understands quotes better, and completion now works in certain 4255 unclosed $(... constructs. 4256 4257p. The arithmetic expansion code was fixed to not need the value of a 4258 variable being assigned a value (fixes the "ss=09; let ss=10" bug). 4259 4260q. Some changes were made to make exported environment creation faster. 4261 4262r. The html documentation will be installed into $(htmldir) if that variable 4263 has a value when `make install' is run. 4264 4265s. Fixed a bug that would cause the bashrc file to be sourced inappropriately 4266 when bash is started by sshd. 4267 4268t. The SSH_CLIENT environment variable is no longer auto-exported. 4269 4270u. A bug that caused redirections with (...) subshells to be performed in 4271 the wrong order was fixed. 4272 4273v. A bug that occasionally caused inappropriate expansion of assignment 4274 statements in compound array assignments was fixed. 4275 4276w. The code that parses the words in a compound array assignment was 4277 simplified considerably and should work better now. 4278 4279x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant 4280 when a user attempts to retrieve the status of a terminated background 4281 process. 4282 4283y. Fixes to the `printf' builtin so that it doesn't try to expand all 4284 backslash escape sequences in the format string before parsing it for 4285 % format specifiers. 4286 42872. Changes to Readline 4288 4289a. The history library tries to truncate the history file only if it is a 4290 regular file. 4291 4292b. A bug that caused _rl_dispatch to address negative array indices on 4293 systems with signed chars was fixed. 4294 4295c. rl-yank-nth-arg now leaves the history position the same as when it was 4296 called. 4297 4298d. Changes to the completion code to handle MS-DOS drive-letter:pathname 4299 filenames. 4300 4301e. Completion is now case-insensitive by default on MS-DOS. 4302 4303f. Fixes to the history file manipulation code for MS-DOS. 4304 4305g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS. 4306 4307h. Some fixes were made to the redisplay code for better operation on MS-DOS. 4308 4309i. The quoted-insert code will now insert tty special chars like ^C. 4310 4311j. A bug was fixed that caused the display code to reference memory before 4312 the start of the prompt string. 4313 4314k. More support for __EMX__ (OS/2). 4315 4316l. A bug was fixed in readline's signal handling that could cause infinite 4317 recursion in signal handlers. 4318 4319m. A bug was fixed that caused the point to be less than zero when rl_forward 4320 was given a very large numeric argument. 4321 4322n. The vi-mode code now gets characters via the application-settable value 4323 of rl_getc_function rather than calling rl_getc directly. 4324 43253. New Features in Bash 4326 4327a. The history builtin has a `-d offset' option to delete the history entry 4328 at position `offset'. 4329 4330b. The prompt expansion code has two new escape sequences: \j, the number of 4331 active jobs; and \l, the basename of the shell's tty device name. 4332 4333c. The `bind' builtin has a new `-x' option to bind key sequences to shell 4334 commands. 4335 4336d. There is a new shell option, no_empty_command_completion, which, when 4337 enabled, disables command completion when TAB is typed on an empty line. 4338 4339e. The `help' builtin has a `-s' option to just print a builtin's usage 4340 synopsys. 4341 4342f. There are several new arithmetic operators: id++, id-- (variable 4343 post-increment/decrement), ++id, --id (variabl pre-increment/decrement), 4344 expr1 , expr2 (comma operator). 4345 4346g. There is a new ksh-93 style arithmetic for command: 4347 for ((expr1 ; expr2; expr3 )); do list; done 4348 4349h. The `read' builtin has a number of new options: 4350 -t timeout only wait timeout seconds for input 4351 -n nchars only read nchars from input instead of a full line 4352 -d delim read until delim rather than newline 4353 -s don't echo input chars as they are read 4354 4355i. The redirection code now handles several filenames specially: 4356 /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or 4357 not they are present in the file system. 4358 4359j. The redirection code now recognizes pathnames of the form 4360 /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket 4361 of the appropriate type to the specified port on the specified host. 4362 4363k. The ksh-93 ${!prefix*} expansion, which expands to the names of all 4364 shell variables whose names start with prefix, has been implemented. 4365 4366l. There is a new dynamic variable, FUNCNAME, which expands to the name of 4367 a currently-executing function. Assignments to FUNCNAME have no effect. 4368 4369m. The GROUPS variable is no longer readonly; assignments to it are silently 4370 discarded. This means it can be unset. 4371 43724. New Features in Readline 4373 4374a. Parentheses matching is now always compiled into readline, and enabled 4375 or disabled when the value of the `blink-matching-paren' variable is 4376 changed. 4377 4378b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename. 4379 4380c. MS-DOS systems now use ~/_history as the default history file. 4381 4382d. history-search-{forward,backward} now leave the point at the end of the 4383 line when the string to search for is empty, like 4384 {reverse,forward}-search-history. 4385 4386e. history-search-{forward,backward} now leave the last history line found 4387 in the readline buffer if the second or subsequent search fails. 4388 4389f. New function for use by applications: rl_on_new_line_with_prompt, used 4390 when an application displays the prompt itself before calling readline(). 4391 4392g. New variable for use by applications: rl_already_prompted. An application 4393 that displays the prompt itself before calling readline() must set this to 4394 a non-zero value. 4395 4396------------------------------------------------------------------------------ 4397This document details the changes between this version, bash-2.03-release, 4398and the previous version, bash-2.03-beta2. 4399 44001. Changes to Bash 4401 4402a. A file descriptor leak in the `fc' builtin was fixed. 4403 4404b. A bug was fixed in the `read' builtin that caused occasional spurious 4405 failures when using `read -e'. 4406 4407c. The version code needed to use the value of the cpp variable 4408 CONF_MACHTYPE rather than MACHTYPE. 4409 4410d. A new test was added to exercise the command printing and copying code. 4411 4412e. A bug was fixed that caused `time' to be recognized as a reserved word 4413 if it was the first pattern in a `case' statement pattern list. 4414 4415------------------------------------------------------------------------------ 4416This document details the changes between this version, bash-2.03-beta2, 4417and the previous version, bash-2.03-beta1. 4418 44191. Changes to Bash 4420 4421a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2. 4422 4423b. config.{guess,sub} support added for the NEC SX4. 4424 4425c. Changed some of the cross-compiling sections of the configure macros in 4426 aclocal.m4 so that configure won't abort. 4427 4428d. Slight changes to how the HTML versions of the bash and readline manuals 4429 are generated. 4430 4431e. Fixed conditional command printing to avoid interpreting printf `%'-escapes 4432 in arguments to [[. 4433 4434f. Don't include the bash malloc on all variants of the alpha processor. 4435 4436g. Changes to configure to make --enable-profiling work on Solaris 2.x. 4437 4438h. Fixed a bug that manifested itself when shell functions were called 4439 between calls to `getopts'. 4440 4441i. Fixed pattern substitution so that a bare `#'as a pattern causes the 4442 replacement string to be prefixed to the search string, and a bare 4443 `%' causes the replacement string to be appended to the search string. 4444 4445j. Fixed a bug in the command execution code that caused child processes 4446 to occasionally have the wrong value for $!. 4447 44482. Changes to Readline 4449 4450a. Added code to the history library to catch history substitutions using 4451 `&' without a previous history substitution or search having been 4452 performed. 4453 44543. New Features in Bash 4455 44564. New Features in Readline 4457 4458a. New bindable variable: `isearch-terminators'. 4459 4460b. New bindable function: `forward-backward-delete-char' (unbound by default). 4461 4462------------------------------------------------------------------------------ 4463This document details the changes between this version, bash-2.03-beta1, 4464and the previous version, bash-2.03-alpha. 4465 44661. Changes to Bash 4467 4468a. A change was made to the help text for `{...}' to make it clear that a 4469 semicolon is required before the closing brace. 4470 4471b. A fix was made to the `test' builtin so that syntax errors cause test 4472 to return an exit status > 1. 4473 4474c. Globbing is no longer performed on assignment statements that appear as 4475 arguments to `assignment builtins' such as `export'. 4476 4477d. System-specific configuration changes were made for: Rhapsody, 4478 AIX 4.2/gcc, BSD/OS 4.0. 4479 4480e. New loadable builtins: ln, unlink. 4481 4482f. Some fixes were made to the globbing code to handle extended glob patterns 4483 which immediately follow a `*'. 4484 4485g. A fix was made to the command printing code to ensure that redirections 4486 following compound commands have a space separating them from the rest 4487 of the command. 4488 4489h. The pathname canonicalization code was changed to produce fewer leading 4490 `//' sequences, since those are interpreted as network file system 4491 pathnames on some systems. 4492 4493i. A fix was made so that loops containing `eval' commands in commands passed 4494 to `bash -c' would not exit prematurely. 4495 4496j. Some changes were made to the job reaping code when the shell is not 4497 interactive, so the shell will retain exit statuses longer for examination 4498 by `wait'. 4499 4500k. A fix was made so that `jobs | command' works again. 4501 4502l. The erroneous compound array assignment var=((...)) is now a syntax error. 4503 4504m. A change was made to the dynamic loading code in `enable' to support 4505 Tenon's MachTen. 4506 4507n. A fix was made to the globbing code so that extended globbing patterns 4508 will correctly match `.' in a bracket expression. 4509 45102. Changes to Readline 4511 4512a. A fix was made to the completion code in which a typo caused the wrong 4513 value to be passed to the function that computed the longest common 4514 prefix of the list of matches. 4515 4516b. The completion code now checks the value of rl_filename_completion_desired, 4517 which is set by application-supplied completion functions to indicate 4518 that filename completion is being performed, to decide whether or not to 4519 call an application-supplied `ignore completions' function. 4520 45213. New Features in Bash 4522 4523a. A change was made to the startup file code so that any shell begun with 4524 the `--login' option, even non-interactive shells, will source the login 4525 shell startup files. 4526 45274. New Features in Readline 4528 4529a. A new variable, rl_erase_empty_line, which, if set by an application using 4530 readline, will cause readline to erase, prompt and all, lines on which the 4531 only thing typed was a newline. 4532 4533------------------------------------------------------------------------------ 4534This document details the changes between this version, bash-2.03-alpha, 4535and the previous version, bash-2.02.1-release. 4536 45371. Changes to Bash 4538 4539a. System-specific configuration changes were made for: Irix 6.x, Unixware 7. 4540 4541b. The texi2dvi and texi2html scripts were updated to the latest versions 4542 from the net. 4543 4544c. The configure tests that determine which native type is 32 bits were 4545 changed to not require a compiled program. 4546 4547d. Fixed a bug in shell_execve that could cause memory to be freed twice 4548 after a failed exec. 4549 4550e. The `printf' test uses `diff -a' if it's available to prevent confusion 4551 due to the non-ascii output. 4552 4553f. Shared object configuration is now performed by a shell script, 4554 support/shobj-conf, which generates values to be substituted into 4555 makefiles by configure. 4556 4557g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a 4558 return value. 4559 4560h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar 4561 handling of RLIMIT_FILESIZE. 4562 4563i. Some new loadable builtins were added: id, printenv, sync, whoami, push, 4564 mkdir. `pushd', `popd', and `dirs' can now be built as regular or 4565 loadable builtins from the same source file. 4566 4567j. Changes were made to `printf' to handle NUL bytes in the expanded format 4568 string. 4569 4570k. The various `make clean' Makefile targets now descend into lib/sh. 4571 4572l. The `type' builtin was changed to use the internal `getopt' so that things 4573 like `type -ap' work as expected. 4574 4575m. There is a new configuration option, --with-installed-readline, to link 4576 bash with a locally-installed version of readline. Only readline version 4577 4.0 and later releases can support this. Shared and static libraries 4578 are supported. The installed include files are used. 4579 4580n. There is a new autoconf macro used to find which basic type is 64 bits. 4581 4582o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*, 4583 AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where 4584 the `-shared' options works correctly. 4585 4586p. A bug was fixed in the bash filename completion code that caused memory to 4587 be freed twice if a directory name containing an unset variable was 4588 completed and the -u option was set. 4589 4590q. The prompt expansion code now quotes the `$' in the `\$' expansion so it 4591 is not processed by subsequent parameter expansion. 4592 4593r. Fixed a parsing bug that caused a single or double quote after a `$$' to 4594 trigger ANSI C expansion or locale translation. 4595 4596s. Fixed a bug in the globbing code that caused quoted filenames containing 4597 no globbing characters to sometimes be incorrectly expanded. 4598 4599t. Changes to the default prompt strings if prompt string decoding is not 4600 compiled into the shell. 4601 4602u. Added `do', `then', `else', `{', and `(' to the list of keywords that may 4603 precede the `time' reserved word. 4604 4605v. The shell may now be cross-built for BeOS as well as cygwin32. 4606 4607w. The conditional command execution code now treats `=' the same as `==' 4608 for deciding when to perform pattern matching. 4609 4610x. The `-e' option no longer causes the shell to exit if a command exits 4611 with a non-zero status while running the startup files. 4612 4613y. The `printf' builtin no longer dumps core if a modifier is supplied in 4614 the format string without a conversion character (e.g. `%h'). 4615 4616z. Array assignments of the form a=(...) no longer show up in the history 4617 list. 4618 4619aa. The parser was fixed to obey the POSIX.2 rules for finding the closing 4620 `}' in a ${...} expression. 4621 4622bb. The history file is now opened with mode 0600 rather than 0666, so bash 4623 no longer relies on the user's umask being set appropriately. 4624 4625cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now 4626 relies on proper behavior from the C library. 4627 4628dd. Minor changes were made to allow quoted variable expansions using 4629 ${...} to be completed correctly if there is no closing `"'. 4630 4631ee. Changes were made to builtins/Makefile.in so that configuring the shell 4632 with `--enable-profiling' works right and builtins/mkbuiltins is 4633 generated. 4634 46352. Changes to Readline 4636 4637a. The version number is now 4.0. 4638 4639b. There is no longer any #ifdef SHELL code in the source files. 4640 4641c. Some changes were made to the key binding code to fix memory leaks and 4642 better support Win32 systems. 4643 4644d. Fixed a silly typo in the paren matching code -- it's microseconds, not 4645 milliseconds. 4646 4647e. The readline library should be compilable by C++ compilers. 4648 4649f. The readline.h public header file now includes function prototypes for 4650 all readline functions, and some changes were made to fix errors in the 4651 source files uncovered by the use of prototypes. 4652 4653g. The maximum numeric argument is now clamped at 1000000. 4654 4655h. Fixes to rl_yank_last_arg to make it behave better. 4656 4657i. Fixed a bug in the display code that caused core dumps if the prompt 4658 string length exceeded 1024 characters. 4659 4660j. The menu completion code was fixed to properly insert a single completion 4661 if there is only one match. 4662 4663k. A bug was fixed that caused the display code to improperly display tabs 4664 after newlines. 4665 46663. New Features in Bash 4667 4668a. New `shopt' option, `restricted_shell', indicating whether or not the 4669 shell was started in restricted mode, for use in startup files. 4670 4671b. Filename generation is now performed on the words between ( and ) in 4672 array assignments (which it probably should have done all along). 4673 4674c. OLDPWD is now auto-exported, as POSIX.2 seems to require. 4675 4676d. ENV and BASH_ENV are read-only variables in a restricted shell. 4677 46784. New Features in Readline 4679 4680a. Many changes to the signal handling: 4681 o Readline now catches SIGQUIT and cleans up the tty before returning; 4682 o A new variable, rl_catch_signals, is available to application writers 4683 to indicate to readline whether or not it should install its own 4684 signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, 4685 SIGTTIN, and SIGTTOU; 4686 o A new variable, rl_catch_sigwinch, is available to application 4687 writers to indicate to readline whether or not it should install its 4688 own signal handler for SIGWINCH, which will chain to the calling 4689 applications's SIGWINCH handler, if one is installed; 4690 o There is a new function, rl_free_line_state, for application signal 4691 handlers to call to free up the state associated with the current 4692 line after receiving a signal; 4693 o There is a new function, rl_cleanup_after_signal, to clean up the 4694 display and terminal state after receiving a signal; 4695 o There is a new function, rl_reset_after_signal, to reinitialize the 4696 terminal and display state after an application signal handler 4697 returns and readline continues 4698 4699b. There is a new function, rl_resize_terminal, to reset readline's idea of 4700 the screen size after a SIGWINCH. 4701 4702c. New public functions: rl_save_prompt and rl_restore_prompt. These were 4703 previously private functions with a `_' prefix. 4704 4705d. New function hook: rl_pre_input_hook, called just before readline starts 4706 reading input, after initialization. 4707 4708e. New function hook: rl_display_matches_hook, called when readline would 4709 display the list of completion matches. The new function 4710 rl_display_match_list is what readline uses internally, and is available 4711 for use by application functions called via this hook. 4712 4713f. New bindable function, delete-char-or-list, like tcsh. 4714 4715------------------------------------------------------------------------------ 4716This document details the changes between this version, bash-2.02.1-release, 4717and the previous version, bash-2.02-release. 4718 47191. Changes to Bash 4720 4721a. A bug that caused the bash readline support to not compile unless aliases 4722 and csh-style history were configured into the shell was fixed. 4723 4724b. Fixed a bug that could cause a core dump when here documents contained 4725 more than 1000 characters. 4726 4727c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same 4728 as the current directory when in POSIX mode. 4729 4730d. Fixed an alignment problem with the memory returned by the bash malloc, 4731 so returned memory is now 64-bit aligned. 4732 4733e. Fixed a bug that caused command substitutions executed within pipelines 4734 to put the terminal in the wrong process group. 4735 4736f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop, 4737 Unixware 2, and Unixware 7. 4738 4739g. Fixes to the pattern matching code to make it work correctly for eight-bit 4740 characters. 4741 4742h. Fixed a problem that occasionally caused the shell to display the wrong 4743 value for the new working directory when changing to a directory found 4744 in $CDPATH when in physical mode. 4745 4746i. Fixed a bug that caused core dumps when using conditional commands in 4747 shell functions. 4748 4749j. Fixed a bug that caused the printf builtin to loop forever if the format 4750 string did not consume any of the arguments. 4751 4752k. Fixed a bug in the parameter expansion code that caused "$@" to be 4753 incorrectly split if $IFS did not contain a space character. 4754 4755l. Fixed a bug that could cause a core dump when completing hostnames if 4756 the number of matching hostnames was an exact multiple of 16. 4757 4758m. Fixed a bug that caused the shell to fork too early when a command 4759 such as `%2 &' was given. 4760 47612. Changes to Readline 4762 4763a. Fixed a problem with redisplay that showed up when the prompt string was 4764 longer than the screen width and the prompt contained invisible characters. 4765 4766------------------------------------------------------------------------------ 4767This document details the changes between this version, bash-2.02-release, 4768and the previous version, bash-2.02-beta2. 4769 47701. Changes to Bash 4771 4772a. A bug was fixed that caused the terminal process group to be set 4773 incorrectly when performing command substitution of builtins in a 4774 pipeline. 4775 4776------------------------------------------------------------------------------ 4777This document details the changes between this version, bash-2.02-beta2, 4778and the previous version, bash-2.02-beta1. 4779 47801. Changes to Bash 4781 4782a. Attempting to `wait' for stopped jobs now generates a warning message. 4783 4784b. Pipelines which exit due to SIGPIPE in non-interactive shells are now 4785 not reported if the shell is compiled -DDONT_REPORT_SIGPIPE. 4786 4787c. Some changes were made to builtins/psize.sh and support/bashbug.sh to 4788 attempt to avoid some /tmp file races and surreptitious file 4789 substitutions. 4790 4791d. Fixed a bug that caused the shell not to compile if configured with 4792 dparen arithmetic but without aliases. 4793 4794e. Fixed a bug that caused the input stream to be switched when assigning 4795 empty arrays with `bash -c'. 4796 4797f. A bug was fixed in the readline expansion glue code that caused bash to 4798 dump core when expanding lines with an unclosed single quote. 4799 4800g. A fix was made to the `cd' builtin so that using a non-empty directory 4801 from $CDPATH results in an absolute pathname of the new current working 4802 directory to be displayed after the current directory is changed. 4803 4804h. Fixed a bug in the variable assignment code that caused the shell to 4805 dump core when referencing an unset variable with `set -u' enabled in 4806 an assignment statement preceding a command. 4807 4808i. Fixed a bug in the exit trap code that caused reserved words to not be 4809 recognized under certain circumstances. 4810 4811j. Fixed a bug in the parameter pattern substitution code so that quote 4812 removal is performed. 4813 4814k. The shell should now configure correctly on Apple Rhapsody systems. 4815 4816l. The `kill' builtin now prints a usage message if it is not passed any 4817 arguments. 4818 4819------------------------------------------------------------------------------ 4820This document details the changes between this version, bash-2.02-beta1, 4821and the previous version, bash-2.02-alpha1. 4822 48231. Changes to Bash 4824 4825a. A few compilation bugs were fixed in the new extended globbing code. 4826 4827b. Executing arithmetic commands now sets the command name to `((' so 4828 error messages look right. 4829 4830c. Fixed some build problems with various configuration options. 4831 4832d. The `printf' builtin now aborts immediately if an illegal format 4833 character is encountered. 4834 4835e. The code that creates here-documents now behaves better if the file it's 4836 trying to create already exists for some reason. 4837 4838f. Fixed a problem with the extended globbing code that made patterns like 4839 `x+*' expand incorrectly. 4840 4841g. The prompt string expansion code no longer quotes tildes with backslashes. 4842 4843h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in 4844 the presence of lstat(2) failures. 4845 4846i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'. 4847 4848j. The mail checking code now ensures that it has a valid default mailpath. 4849 4850k. A bug was fixed that caused local variables to be unset inappropriately 4851 when sourcing a script from within another sourced script. 4852 4853l. A bug was fixed in the history saving code so that functions are saved 4854 in the history list correctly if `cmdhist' is enabled, but `lithist' 4855 is not. 4856 4857m. A bug was fixed that caused printf overflows when displaying error 4858 messages. 4859 4860n. It should be easier to build the loadble builtins in examples/loadables, 4861 though some manual editing of the generated Makefile is still required. 4862 4863o. The user's primary group is now always ${GROUPS[0]}. 4864 4865p. Some updates were made to support/config.guess from the GNU master copy. 4866 4867q. Some changes were made to the autoconf support for Solaris 2.6 large 4868 files. 4869 4870r. The `command' builtins now does the right thing when confstr(3) cannot 4871 find a value for _CS_PATH. 4872 4873s. Extended globbing expressions like `*.!(c)' are not history expanded if 4874 `extglob' is enabled. 4875 4876t. Using the `-P' option to `cd' will force the value that is assigned to 4877 PWD to not contain any symbolic links. 4878 48792. Changes to Readline 4880 4881a. The code that prints completion listings now behaves better if one or 4882 more of the filenames contains non-printable characters. 4883 4884b. The time delay when showing matching parentheses is now 0.5 seconds. 4885 4886------------------------------------------------------------------------------ 4887This document details the changes between this version, bash-2.02-alpha1, 4888and the previous version, bash-2.01.1-release. 4889 48901. Changes to Bash 4891 4892a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x, 4893 Solaris 2.6, SINIX SVR4. 4894 4895b. Changes were made to the generated `info' files so that `install-info' 4896 works correctly. 4897 4898c. PWD is now auto-exported. 4899 4900d. A fix was made to the pipeline code to make sure that the shell forks 4901 to execute simple commands consisting solely of assignment statements. 4902 4903e. Changes to the test suite for systems with 14-character filenames. 4904 4905f. The default sizes of some internal hash tables have been made smaller 4906 to reduce the shell's memory footprint. 4907 4908g. The `((...))' arithmetic command is now executed directly instead of 4909 being translated into `let "..."'. 4910 4911h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}", 4912 and "${array[@]}" expand correctly when IFS does not contain a space 4913 character, is unset, or is set to NULL. 4914 4915i. The indirect expansion code (${!var}) was changed so that the only 4916 valid values of `var' are variable names, positional parameters, `#', 4917 `@', and `*'. 4918 4919j. An arithmetic expression error in a $((...)) expansion now causes a 4920 non-interactive shell running in posix mode to exit. 4921 4922k. Compound array assignment now splits the words within the parentheses 4923 on shell metacharacters like the parser would before expansing them 4924 and performing the assignment. This is for compatibility with ksh-93. 4925 4926l. The internal shell backslash-quoting code (used in the output of `set' 4927 and completion) now quotes tildes if they appear at the start of the 4928 string or after a `=' or `:'. 4929 4930m. A couple of bugs with `shopt -o' were fixed. 4931 4932n. `bash +o' now displays the same output as `set +o' before starting an 4933 interactive shell. 4934 4935o. A bug that caused command substitution and the `eval' builtin to 4936 occasionally free memory twice when an error was encountered was fixed. 4937 4938p. The filename globbing code no longer requires read permission for a 4939 directory when the filename to be matched does not contain any globbing 4940 characters, as POSIX.2 specifies. 4941 4942q. A bug was fixed so that the job containing the last asynchronous 4943 process is not removed from the job table until a `wait' is executed 4944 for that process or another asynchronous process is started. This 4945 satisfies a POSIX.2 requirement. 4946 4947r. A `select' bug was fixed so that a non-numeric user response is treated 4948 the same as a numeric response that is out of range. 4949 4950s. The shell no longer parses the value of SHELLOPTS from the environment 4951 if it is restricted, running setuid, or running in `privileged mode'. 4952 4953t. Fixes were made to enable large file support on systems such as 4954 Solaris 2.6, where the size of a file may be larger than can be held 4955 in an `int'. 4956 4957u. The filename hashing code was fixed to not add `./' to the beginning of 4958 filenames which already begin with `./'. 4959 4960v. The configure script was changed so that the GNU termcap library is not 4961 compiled in if `prefer-curses' has been specified. 4962 4963w. HISTCONTROL and HISTIGNORE are no longer applied to the second and 4964 subsequent lines of a multi-line command. 4965 4966x. A fix was made to `disown' so that it does a better job of catching 4967 out-of-range jobs. 4968 4969y. Non-interactive shells no longer report the status of processes terminated 4970 due to SIGINT, even if the standard output is a terminal. 4971 4972z. A bug that caused the output of `jobs' to have extra carriage returns 4973 was fixed. 4974 4975aa. A bug that caused PIPESTATUS to not be set when builtins or shell 4976 functions were executed in the foreground was fixed. 4977 4978bb. Bash now attempts to detect when it is being run by sshd, and treats 4979 that case identically to being run by rshd. 4980 4981cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell 4982 options was changed was fixed. 4983 4984dd. The `kill' builtin now disallows empty or missing process id arguments 4985 instead of treating them as identical to `0', which means the current 4986 process. 4987 4988ee. `var=value declare -x var' now behaves identically to 4989 `var=value export var'. Similarly for `var=value declare -r var' and 4990 `var=value readonly var'. 4991 4992ff. A few memory leaks were fixed. 4993 4994gg. `alias' and `unalias' now print error messages when passed an argument 4995 that is not an alias for printing or deletion, even when the shell is 4996 not interactive, as POSIX.2 specifies. 4997 4998hh. `alias' and `alias -p' now return a status of 0 when no aliases are 4999 defined, as POSIX.2 specifes. 5000 5001ii. `cd -' now prints the pathname of the new working directory if the shell 5002 is interactive. 5003 5004jj. A fix was made so that the code that binds $PWD now copes with getcwd() 5005 returning NULL. 5006 5007kk. `unset' now checks whether or not a function name it's trying to unset 5008 is a valid shell identifier only when the shell is running in posix mode. 5009 5010ll. A change was made to the code that generates filenames for here documents 5011 to make them less prone to name collisions. 5012 5013mm. The parser was changed so that `time' is recognized as a reserved word 5014 only at the beginning of a pipeline. 5015 5016nn. The pathname canonicalization code was changed so that `//' is converted 5017 into `/', but all other pathnames beginning with `//' are left alone, as 5018 POSIX.2 specifies. 5019 5020oo. The `logout' builtin will no longer exit a non-interactive non-login 5021 shell. 5022 50232. Changes to Readline 5024 5025a. Fixed a problem in the readline test program rltest.c that caused a core 5026 dump. 5027 5028b. The code that handles parser directives in inputrc files now displays 5029 more error messages. 5030 5031c. The history expansion code was fixed so that the appearance of the 5032 history comment character at the beginning of a word inhibits history 5033 expansion for that word and the rest of the input line. 5034 50353. New Features in Bash 5036 5037a. A new version of malloc, based on the older GNU malloc, that has many 5038 changes, is more page-based, is more conservative with memory usage, 5039 and does not `orphan' large blocks when they are freed. 5040 5041b. A new version of gmalloc, based on the old GLIBC malloc, with many 5042 changes and range checking included by default. 5043 5044c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic 5045 Regular Expression matching, including character classes, collating 5046 symbols, equivalence classes, and support for case-insensitive pattern 5047 matching. 5048 5049d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been 5050 implemented, controlled by a new `shopt' option, `extglob'. 5051 5052e. There is a new ksh-like `[[' compound command, which implements 5053 extended `test' functionality. 5054 5055f. There is a new `printf' builtin, implemented according to the POSIX.2 5056 specification. 5057 5058g. There is a new feature for command substitution: $(< filename) now expands 5059 to the contents of `filename', with any trailing newlines removed 5060 (equivalent to $(cat filename)). 5061 5062h. There are new tilde prefixes which expand to directories from the 5063 directory stack. 5064 5065i. There is a new `**' arithmetic operator to do exponentiation. 5066 5067j. There are new configuration options to control how bash is linked: 5068 `--enable-profiling', to allow bash to be profiled with gprof, and 5069 `--enable-static-link', to allow bash to be linked statically. 5070 5071k. There is a new configuration option, `--enable-cond-command', which 5072 controls whether or not the `[[' command is included. It is on by 5073 default. 5074 5075l. There is a new configuration option, `--enable-extended-glob', which 5076 controls whether or not the ksh extended globbing feature is included. 5077 It is enabled by default. 5078 5079m. There is a new configuration #define in config.h.top that, when enabled, 5080 will cause all login shells to source /etc/profile and one of the user- 5081 specific login shell startup files, whether or not the shell is 5082 interactive. 5083 5084n. There is a new invocation option, `--dump-po-strings', to dump 5085 a shell script's translatable strings ($"...") in GNU `po' format. 5086 5087o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive 5088 pattern matching when globbing filenames and using the `case' construct. 5089 5090p. There is a new `shopt' option, `huponexit', which, when enabled, causes 5091 the shell to send SIGHUP to all jobs when an interactive login shell 5092 exits. 5093 5094q. `bind' has a new `-u' option, which takes a readline function name as an 5095 argument and unbinds all key sequences bound to that function in a 5096 specified keymap. 5097 5098r. `disown' now has `-a' and `-r' options, to limit operation to all jobs 5099 and running jobs, respectively. 5100 5101s. The `shopt' `-p' option now causes output to be displayed in a reusable 5102 format. 5103 5104t. `test' has a new `-N' option, which returns true if the filename argument 5105 has been modified since it was last accessed. 5106 5107u. `umask' now has a `-p' option to print output in a reusable format. 5108 5109v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...' 5110 translation code. It expands to the character whose ascii code is NNN 5111 in hexadecimal. 5112 5113w. The prompt string expansion code has a new `\r' escape sequence. 5114 5115x. The shell may now be cross-compiled for the CYGWIN32 environment on 5116 a Unix machine. 5117 51184. New Features in Readline 5119 5120a. There is now an option for `iterative' yank-last-arg handline, so a user 5121 can keep entering `M-.', yanking the last argument of successive history 5122 lines. 5123 5124b. New variable, `print-completions-horizontally', which causes completion 5125 matches to be displayed across the screen (like `ls -x') rather than up 5126 and down the screen (like `ls'). 5127 5128c. New variable, `completion-ignore-case', which causes filename completion 5129 and matching to be performed case-insensitively. 5130 5131d. There is a new bindable command, `magic-space', which causes history 5132 expansion to be performed on the current readline buffer and a space to 5133 be inserted into the result. 5134 5135e. There is a new bindable command, `menu-complete', which enables tcsh-like 5136 menu completion (successive executions of menu-complete insert a single 5137 completion match, cycling through the list of possible completions). 5138 5139f. There is a new bindable command, `paste-from-clipboard', for use on Win32 5140 systems, to insert the text from the Win32 clipboard into the editing 5141 buffer. 5142 5143g. The key sequence translation code now understands printf-style backslash 5144 escape sequences, including \NNN octal escapes. These escape sequences 5145 may be used in key sequence definitions or macro values. 5146 5147h. An `$include' inputrc file parser directive has been added. 5148 5149------------------------------------------------------------------------------ 5150This document details the changes between this version, bash-2.01.1-release, 5151and the previous version, bash-2.01-release. 5152 51531. Changes to Bash 5154 5155a. The select command was fixed to check the validity of the user's 5156 input more strenuously. 5157 5158b. A bug was fixed that prevented `time' from timing commands correctly 5159 when supplied as an argument to `bash -c'. 5160 5161c. A fix was made to the mail checking code to keep from adding the same 5162 mail file to the list of files to check multiple times when parsing 5163 $MAILPATH. 5164 5165d. Fixed an off-by-one error in the tilde expansion library. 5166 5167e. When using the compound array assignment syntax, the old value of 5168 the array is cleared before assigning the new value. 5169 5170f. Fixed a bug that could cause a core dump when a trap handler was reset 5171 to the default in the trap command associated with that signal. 5172 5173g. Fixed a bug in the locale code that occurred when assigning a value 5174 to LC_ALL. 5175 5176h. A change was made to the parser so that words of the form xxx=(...) 5177 are not considered compound assignment statements unless there are 5178 characters before the `='. 5179 5180i. A fix was made to the command tracing code to correctly quote each 5181 word of output. 5182 5183j. Some changes were made to the bash-specific autoconf tests to make them 5184 more portable. 5185 5186k. Completion of words with globbing characters now correctly quotes the 5187 result. 5188 5189l. The directory /var/spool/mail is now preferred to /usr/spool/mail when 5190 configure is deciding on the default mail directory. 5191 5192m. The brace completion code was fixed to not quote the `{' and `}'. 5193 5194n. Some fixes were made to make $RANDOM more random in subshells. 5195 5196o. System-specific changes were made to configure for: SVR4.2 5197 5198p. Changes were made so that completion of words containing globbing chars 5199 substitutes the result only if a single filename was matched. 5200 5201q. The window size is now recomputed after a job is stopped with SIGTSTP if 5202 the user has set `checkwinsize' with `shopt'. 5203 5204r. When doing substring expansion, out-of-range substring specifiers now 5205 cause nothing to be substituted rather than an expansion error. 5206 5207s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' -- 5208 only `EXIT' and `DEBUG' are accepted. 5209 5210t. The display of trapped signals now uses the signal number if signals 5211 for which bash does not know the name are trapped. 5212 5213u. A fix was made so that `bash -r' does not turn on restricted mode until 5214 after the startup files are executed. 5215 5216v. A bug was fixed that occasionally caused a core dump when a variable 5217 found in the temporary environment of export/declare/readonly had a 5218 null value. 5219 5220w. A bug that occasionally caused unallocated memory to be passed to free() 5221 when doing arithmetic substitution was fixed. 5222 5223x. A bug that caused a buffer overrun when expanding a prompt string 5224 containing `\w' and ${#PWD} exceeded PATH_MAX was fixed. 5225 5226y. A problem with the completion code that occasionally caused it to 5227 refer to a character before the beginning of the readline line buffer 5228 was fixed. 5229 5230z. A bug was fixed so that the `read' builtin restarts reads when 5231 interrupted by signals other than SIGINT. 5232 5233aa. Fixed a bug that caused a command to be freed twice when there was 5234 an evaluation error in the `eval' command. 5235 52362. Changes to Readline 5237 5238a. Added a missing `extern' to a declaration in readline.h that kept 5239 readline from compiling cleanly on some systems. 5240 5241b. The history file is now opened with mode 0600 when it is written for 5242 better security. 5243 5244c. Changes were made to the SIGWINCH handling code so that prompt redisplay 5245 is done better. 5246 5247d. ^G now interrupts incremental searches correctly. 5248 5249e. A bug that caused a core dump when the set of characters to be quoted 5250 when completing words was empty was fixed. 5251 5252------------------------------------------------------------------------------ 5253This document details the changes between this version, bash-2.01-release, 5254and the previous version, bash-2.01-beta2. 5255 52561. Changes to Bash 5257 5258a. The `distclean' target should remove the `printenv' executable if it 5259 has been created. 5260 5261b. The test suite was changed slightly to ensure that the error messages 5262 are printed in English. 5263 5264c. A bug that caused the shell to dump core when a filename containing a 5265 `/' was passed to `hash' was fixed. 5266 5267d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1 5268 requires. 5269 5270e. A memory leak when completing commands was fixed. 5271 5272f. A memory leak that occurred when checking the hash table for commands 5273 with relative paths was fixed. 5274 5275------------------------------------------------------------------------------ 5276This document details the changes between this version, bash-2.01-beta2, 5277and the previous version, bash-2.01-beta1. 5278 52791. Changes to Bash 5280 5281a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if 5282 the current (soft) limit is less than or equal to the hard limit. 5283 5284b. Fixed a bug that caused the bash emulation of strcasecmp to produce 5285 incorrect results. 5286 5287c. A bug that caused memory to be freed twice when a trap handler resets 5288 the trap more than once was fixed. 5289 5290d. A bug that caused machines where sizeof (pointer) > sizeof (int) to 5291 fail (and possibly dump core) when trying to unwind-protect a null 5292 pointer was fixed. 5293 5294e. The startup files should not be run with job control enabled. This fix 5295 allows SIGINT to once again interrupt startup file execution. 5296 5297f. Bash should not change the SIGPROF handler if it is set to something 5298 other than SIG_DFL. 5299 5300g. The completion code that provides bash-specific completions for readline 5301 now quotes characters that the readline code would treat as word break 5302 characters if they appear in a file name. 5303 5304h. The completion code now correctly quotes filenames containing a `!', 5305 even if the user attempted to use double quotes when attempting 5306 completion. 5307 5308i. A bug that caused the shell to dump core when `disown' was called without 5309 arguments and there was no current job was fixed. 5310 5311j. A construct like $((foo);bar) is now processed as a command substitution 5312 rather than as a bad arithmetic substitution. 5313 5314k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist' 5315 shell options when editing and re-executing a series of commands were 5316 fixed. 5317 5318l. A fix was made to the grammar -- the list of commands between `do' and 5319 `done' in the body of a `for' command should be treated the same as a 5320 while loop. 5321 53222. Changes to Readline 5323 5324a. A couple of bugs that caused the history search functions to attempt to 5325 free a NULL pointer were fixed. 5326 5327b. If the C library provides setlocale(3), readline does not need to look 5328 at various environment variables to decide whether or not to go into 5329 eight-bit mode automatically -- just check whether the current locale 5330 is not `C' or `POSIX'. 5331 5332c. If the filename completion function finds that a directory was not closed 5333 by a previous (interrupted) completion, it closes the directory with 5334 closedir(). 5335 53363. New Features in Bash 5337 5338a. New bindable readline commands: history-and-alias-expand-line and 5339 alias-expand-line. The code was always in there, there was just no 5340 way to execute it. 5341 5342------------------------------------------------------------------------------ 5343This document details the changes between this version, bash-2.01-beta1, 5344and the previous version, bash-2.01-alpha1. 5345 53461. Changes to Bash 5347 5348a. Fixed a problem that could cause file descriptors used for process 5349 substitution to conflict with those used explicitly in redirections. 5350 5351b. Made it easier to regenerate configure if the user changes configure.in. 5352 5353c. ${GROUPS[0]} should always be the primary group, even on systems without 5354 multiple groups. 5355 5356d. Spelling correction is no longer enabled by default. 5357 5358e. Fixes to quoting problems in `bashbug'. 5359 5360f. OS-specific configuration changes were made for: Irix 6. 5361 5362g. OS-specific code changes were made for: QNX. 5363 5364h. A more meaningful message is now printed when the file in /tmp for a 5365 here document cannot be created. 5366 5367i. Many changes to the shell's variable initialization code to speed 5368 non-interactive startup. 5369 5370j. Changes to the non-job-control code so that it does not try to open 5371 /dev/tty. 5372 5373k. The output of `set' and `export' is once again sorted, as POSIX wants. 5374 5375l. Fixed a problem caused by a recursive call reparsing the value of 5376 $SHELLOPTS. 5377 5378m. The tilde code no longer calls getenv() when it's compiled as part of 5379 the shell, which should eliminate problems on systems that cannot 5380 redefine getenv(), like the NeXT OS. 5381 5382n. Fixed a problem that caused `bash -o' or `bash +o' to not list all 5383 the shell options. 5384 5385o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit 5386 only if the hard limit is greater than the current (soft) limit. 5387 5388p. Fixed a problem that arose when building bash in a different directory 5389 than the source and y.tab.[ch] were remade with something other than 5390 bison. This came up most often on NetBSD. 5391 5392q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated 5393 an unfinished command completion (`/), which generated errors. 5394 5395r. The bash special tilde expansions (~-, ~+) are now attempted before 5396 calling the standard tilde expansion code, which should eliminate the 5397 problems people have been seeing with this on Solaris 2.5.1. 5398 5399s. Added support for <stdarg.h> to places where it was missing. 5400 5401t. Changed the code that reads the output of a command substitution to not 5402 go through stdio. This reduces the memory requirements and is faster. 5403 5404u. A number of changes to speed up export environment creation were made. 5405 5406v. A number of memory leaks were fixed as the result of running the test 5407 scripts through Purify. 5408 5409w. Fixed a bug that caused subshells forked to interpret executable 5410 scripts without a leading `#!' to not reinitialize the values of 5411 the shell options. 5412 54132. Changes to Readline 5414 5415a. History library has less `#ifdef SHELL' code -- abstracted stuff out 5416 into application-specific function hooks. 5417 5418b. Readline no longer calls getenv() if it's compiled as part of the shell, 5419 which should eliminate problems on systems that cannot redefine getenv(), 5420 like the NeXT OS. 5421 5422c. Fixed translation of ESC when `untranslating' macro values. 5423 5424d. The region kill operation now fixes the mark if it ends up beyond the 5425 boundaries of the line after the region is deleted. 5426 54273. New Features in Bash 5428 5429a. New argument for `configure': `--with-curses'. This can be used to 5430 override the selection of the termcap library on systems where it is 5431 deficient. 5432 5433------------------------------------------------------------------------------ 5434This document details the changes between this version, bash-2.01-alpha1, 5435and the previous version, bash-2.0-release. 5436 54371. Changes to Bash 5438 5439a. System-specific configuration changes for: FreeBSD, SunOS4, Irix, 5440 MachTen, QNX 4.2, Harris Night Hawk, SunOS5. 5441 5442b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2, 5443 HP-UX, AIX 4.2. 5444 5445c. A bug that caused the exec builtin to fail because the full pathname of 5446 the command could not be found was fixed. 5447 5448d. The code that performs output redirections is now more resistant to 5449 race conditions and possible security exploits. 5450 5451e. A bug that caused the shell to dump core when performing pattern 5452 substitutions on variable values was fixed. 5453 5454f. More hosts are now recognized by the auto-configuration mechanism 5455 (OpenBSD, QNX, others). 5456 5457g. Assignments to read-only variables that attempt to convert them to 5458 arrays are now errors. 5459 5460h. A bug that caused shell scripts using array assignments in POSIX mode 5461 to exit after the assignment was performed was fixed. 5462 5463i. The substring expansion code is now more careful about running off the 5464 ends of the expanded variable value. 5465 5466j. A bug that caused completion to fail if a backquoted command substitution 5467 appeared anywhere on the line was fixed. 5468 5469k. The `source' builtin no longer turns off history if it has been enabled 5470 in a non-interactive shell. 5471 5472l. A bug that caused the shell to crash when `disown' was given a pid 5473 instead of a job number was fixed. 5474 5475m. The `cd' spelling correction code will not try to change to `.' if no 5476 directory entries match a single-character argument. 5477 5478n. A bad variable name supplied to `declare', `export', or `readonly' no 5479 longer causes a non-interactive shell in POSIX mode to exit. 5480 5481o. Some fixes were made to the test suite to handle peculiarities of 5482 various Unix versions. 5483 5484p. The bash completion code now quotes characters that readline would 5485 treat as word breaks for completion but are not shell metacharacters. 5486 5487q. Bad options supplied at invocation now cause a usage message to be 5488 displayed. 5489 5490r. Fixes were made to the code that handles DEBUG traps so that the trap 5491 string is not freed inappropriately. 5492 5493s. Some changes were made to the bash debugger in examples/bashdb -- it 5494 should be closer to working now. 5495 5496t. A problem that caused the default filename used for mail checking to be 5497 wrong was fixed. 5498 5499u. A fix was made to the `echo' builtin so that NUL characters printed with 5500 `echo -e' do not cause the output to be truncated. 5501 5502v. A fix was made to the job control code so that the shell behaves better 5503 when monitor mode is enabled in a non-interactive shell. 5504 5505w. Bash no longer catches all of the terminating signals in a non- 5506 interactive shell until a trap is set on EXIT, which should result in 5507 quicker startup. 5508 5509x. A fix was made to the command timing code so that `time' can be used in 5510 a loop. 5511 5512y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as 5513 a nested subshell rather than strictly as an (erroneous) arithmetic 5514 command. 5515 5516z. A fix was made to the globbing code so that it correctly matches quoted 5517 filenames beginning with a `.'. 5518 5519aa. A bug in `fc' that caused some multi-line commands to not be stored as 5520 one command in the history when they were re-executed after editing 5521 (with `fc -e') was fixed. 5522 5523bb. The `ulimit' builtin now attempts to catch some classes of integer 5524 overflows. 5525 5526cc. The command-oriented-history code no longer attempts to add `;' 5527 inappropriately when a newline appears while reading a $(...) command 5528 substitution. 5529 5530dd. A bug that caused the shell to dump core when `help --' was executed 5531 was fixed. 5532 5533ee. A bug that caused the shell to crash when an unset variable appeared 5534 in the body of a here document after `set -u' had been executed was 5535 fixed. 5536 5537ff. Implicit input redirections from /dev/null for asynchronous commands 5538 are now handled better. 5539 5540gg. A bug that caused the shell to fail to compile when configured with 5541 `--disable-readline' was fixed. 5542 5543hh. The globbing code should now be interruptible. 5544 5545ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a 5546 stopped job and adjusts the data structures accordingly, as if `bg' had 5547 been executed instead. 5548 5549jj. A bug that caused the shell to crash when mixing calls to `getopts' 5550 and `shift' on the same set of positional parameters was fixed. 5551 5552kk. The command printing code now preserves the `-p' flag to `time'. 5553 5554ll. The command printing code now handles here documents better when there 5555 are other redirections associated with the command. 5556 5557mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_) 5558 is no longer placed into the environment of executed commands -- users 5559 of glibc had too many problems with it. 5560 5561nn. Reorganized the code that generates signames.h. The signal_names list 5562 is now more complete but may be slightly different (SIGABRT is favored 5563 over SIGIOT, for example). The preferred signal names are those 5564 listed in the POSIX.2 standard. 5565 5566oo. `bashbug' now uses a filename shorter than 14 characters for its 5567 temporary file, and asks for confirmation before sending the bug 5568 report. 5569 5570pp. A bug that caused TAB completion in vi editing mode to not be turned 5571 off when `set -o posix' was executed or back on when `set +o posix' 5572 was executed was fixed. 5573 5574qq. A bug in the brace expansion code that caused brace expansions appearing 5575 in new-style $(...) command substitutions to be inappropriately expanded 5576 was fixed. 5577 5578rr. A bug in the readline hook shell-expand-line that could cause memory to 5579 be inappropriately freed was fixed. 5580 5581ss. A bug that caused some arithmetic expressions containing `&&' and `||' 5582 to be parsed with the wrong precedence has been fixed. 5583 5584tt. References to unbound variables after `set -u' has been executed now 5585 cause the shell to exit immediately, as they should. 5586 5587uu. A bug that caused the shell to exit inappropriately when `set -e' had 5588 been executed and a command's return status was being inverted with the 5589 `!' reserved word was fixed. 5590 5591vv. A bug that could occasionally cause the shell to crash with a 5592 divide-by-zero error when timing a command was fixed. 5593 5594ww. A bug that caused parameter pattern substitution to leave stray 5595 backslashes in the replacement string when the expression is in 5596 double quotes was fixed. 5597 5598xx. The `break' and `continue' builtins now break out of all loops when an 5599 invalid count argument is supplied. 5600 5601yy. Fixed a bug that caused PATH to be set to the empty string if 5602 `command -p' is executed with PATH unset. 5603 5604zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix, 5605 as POSIX specifies. 5606 5607aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS 5608 if there were no shell options set. 5609 5610bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX 5611 mode, their output is as POSIX.2 specifies. 5612 5613ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually 5614 creates an array variable. 5615 5616ddd. Fixed a bug that prevented `time' from correctly timing background 5617 pipelines. 5618 56192. Changes to Readline 5620 5621a. A bug that caused an extra newline to be printed when the cursor was on 5622 an otherwise empty line was fixed. 5623 5624b. An instance of memory being used after it was freed was corrected. 5625 5626c. The redisplay code now works when the prompt is longer than the screen 5627 width. 5628 5629d. `dump-macros' is now a bindable name, as it should have been all along. 5630 5631e. Non-printable characters are now expanded when displaying macros and 5632 their values. 5633 5634f. The `dump-variables' and `dump-macros' commands now output a leading 5635 newline if they're called as the result of a key sequence, rather 5636 than directly by an application. 5637 56383. New Features in Bash 5639 5640a. There is a new builtin array variable: GROUPS, the set of groups to which 5641 the user belongs. This is used by the test suite. 5642 56434. New Features in Readline 5644 5645a. If a key sequence bound to `universal-argument' is read while reading a 5646 numeric argument started with `universal-argument', it terminates the 5647 argument but is otherwise ignored. This provides a way to insert multiple 5648 instances of a digit string, and is how GNU emacs does it. 5649 5650------------------------------------------------------------------------------ 5651This document details the changes between this version, bash-2.0-release, 5652and the previous version, bash-2.0-beta3. 5653 56541. Changes to Bash 5655 5656a. Fix to the `getopts' builtin so that it does the right thing when a 5657 required option argument is not present. 5658 5659b. The completion code now updates the common prefix of matched names 5660 after FIGNORE processing is done, since any names that were removed 5661 may have changed the common prefix. 5662 5663c. Fixed a bug that made messages in MAILPATH entries not work correctly. 5664 5665d. Fixed a serious documentation error in the description of the new 5666 ${parameter:offset[:length]} expansion. 5667 5668e. Fixes to make parameter substring expansion ({$param:offset[:length]}) 5669 work when within double quotes. 5670 5671f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional 5672 parameters. 5673 5674g. Corrected a misspelling of `unlimited' in the output of `ulimit'. 5675 5676h. Fixed a bug that caused executable scripts without a leading `#!' to 5677 occasionally pick up the wrong set of positional parameters. 5678 5679i. Linux systems now have a working `ulimit -v', using RLIMIT_AS. 5680 5681j. Updated config.guess so that many more machine types are recognized. 5682 5683k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]} 5684 expansion. 5685 5686l. If the shell is named `-su', and `-c command' is supplied, read and 5687 execute the login shell startup files even though the shell is not 5688 interactive. This is to support the `-' option to `su'. 5689 5690m. Fixed a bug that caused core dumps when the DEBUG trap was ignored 5691 with `trap "" DEBUG' and a shell function was subsequently executed. 5692 5693n. Fixed a bug that caused core dumps in the read builtin when IFS was 5694 set to the null string and the input had leading whitespace. 5695 56962. Changes to Readline 5697 5698a. Fixed a bug that caused a numeric argument of 1024 to be ignored when 5699 inserting text. 5700 5701b. Fixed the display code so that the numeric argument is displayed as it's 5702 being entered. 5703 5704c. Fixed the numeric argument reading code so that `M-- command' is 5705 equivalent to `M--1 command', as the prompt implies. 5706 57073. New Features in Bash 5708 5709a. `ulimit' now sets both hard and soft limits and reports the soft limit 5710 by default (when neither -H nor -S is specified). This is compatible 5711 with versions of sh and ksh that implement `ulimit'. 5712 5713b. Integer constants have been extended to base 64. 5714 57154. New Features in Readline 5716 5717a. The `home' and `end' keys are now bound to beginning-of-line and 5718 end-of-line, respectively, if the corresponding termcap capabilities 5719 are present. 5720 5721------------------------------------------------------------------------------ 5722This document details the changes between this version, bash-2.0-beta3, 5723and the previous version, bash-2.0-beta2. 5724 57251. Changes to Bash 5726 5727a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX. 5728 5729b. When in POSIX mode, variable assignments preceding a special builtin 5730 persist in the shell environment after the builtin completes. 5731 5732c. Changed all calls to getwd() to getcwd(). Improved check for systems 5733 where the libc getcwd() calls popen(), since that breaks on some 5734 systems when job control is being used. 5735 5736d. Fixed a bug that caused seg faults when executing scripts with the 5737 execute bit set but without a leading `#!'. 5738 5739e. The environment passed to executed commands is never sorted. 5740 5741f. A bug was fixed in the code that expands ${name[@]} to the number of 5742 elements in an array variable. 5743 5744g. A bug was fixed in the array compound assignment code ( A=( ... ) ). 5745 5746h. Window size changes now correctly propagate down to readline if 5747 the shopt `checkwinsize' option is enabled. 5748 5749i. A fix was made in the code that expands to the length of a variable 5750 value (${#var}). 5751 5752j. A fix was made to the command builtin so that it did not turn on the 5753 `no fork' flag inappropriately. 5754 5755k. A fix was made to make `set -n' work more reliably. 5756 5757l. A fix was made to the job control initialization code so that the 5758 terminal process group is set to the shell's process group if the 5759 shell changes its own process group. 5760 57612. Changes to Readline 5762 5763a. System-specific changes for: SCO 3.2v[45]. 5764 5765b. The behavior of the vi-mode `.' when redoing an `i' command was changed 5766 to insert the text previously inserted by the `i' command rather than 5767 simply entering insert mode. 5768 57693. New features in Bash 5770 5771a. There is a new version of the autoload function package, in 5772 examples/functions/autoload.v2, that uses arrays and provides more 5773 functionality. 5774 5775b. Support for LC_COLLATE and locale-specific sorting of the results of 5776 pathname expansion if strcoll() is available. 5777 57784. New Features in Readline 5779 5780a. Support for locale-specific sorting of completion possibilities if 5781 strcoll() is available. 5782 5783------------------------------------------------------------------------------ 5784This document details the changes between this version, bash-2.0-beta2, 5785and the previous version, bash-2.0-beta1. 5786 57871. Changes to Bash 5788 5789a. `pushd -' is once again equivalent to `pushd $OLDPWD'. 5790 5791b. OS-specific changes for: SCO 3.2v[45]. 5792 5793c. A change was made to the fix for the recently-reported security hole 5794 when reading characters with octal value 255 to make it work better on 5795 systems with restartable system calls when not using readline. 5796 5797d. Some changes were made to the test suite so that it works if you 5798 configure bash with --enable-usg-echo-default. 5799 5800e. A fix was made to the parsing of conditional arithmetic expressions. 5801 5802f. Illegal arithmetic bases now cause an arithmetic evaluation error rather 5803 than being silently reset. 5804 5805g. Multiple arithmetic bases now cause an arithmetic evaluation error 5806 instead of being ignored. 5807 5808h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2. 5809 5810i. A bug that sometimes caused array indices to be evaluated twice (which 5811 would cause errors when they contained assignment statements) was fixed. 5812 5813j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning 5814 unsigned values and to simplify the code. 5815 5816k. A bug in the command-oriented-history code that caused it to sometimes 5817 put semicolons after right parens inappropriately was fixed. 5818 5819l. The values inserted into the prompt by the \w and \W escape sequences 5820 are now quoted to prevent further expansion. 5821 5822m. An interactive shell invoked as `sh' now reads and executes commands 5823 from the file named by $ENV when it starts up. If it's a login shell, 5824 it does this after reading /etc/profile and ~/.profile. 5825 5826n. The file named by $ENV is never read by non-interactive shells. 5827 58282. Changes to Readline 5829 5830a. A few changes were made to hide some macros and functions that should not 5831 be public. 5832 5833b. An off-by-one error that caused seg faults in the history expansion code 5834 was fixed. 5835 58363. New Features in Bash 5837 5838a. The ksh-style ((...)) arithmetic command was implemented. It is exactly 5839 identical to let "...". This is controlled by a new option to configure, 5840 `--enable-dparen-arithmetic', which is on by default. 5841 5842b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If 5843 defined to a filename, bash reads and executes commands from that file 5844 when a login shell exits. It's commented out by default. 5845 5846c. `ulimit' has a `-l' option that reports the maximum amount of data that 5847 may be locked into memory on 4.4BSD-based systems. 5848 5849------------------------------------------------------------------------------ 5850This document details the changes between this version, bash-2.0-beta1, 5851and the previous version, bash-2.0-alpha4. 5852 58531. Changes to Bash 5854 5855a. A bug that sometimes caused traps to be ignored on signals the 5856 shell treats specially was fixed. 5857 5858b. The internationalization code was changed to track the values of 5859 LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN 5860 and TEXTDOMAINDIR variables are also tracked; changes cause calls 5861 to textdomain() and bindtextdomain(), if available. 5862 5863c. A bug was fixed that sometimes caused double-quoted strings to be 5864 parsed incorrectly. 5865 5866d. Changes were made so that the siglist code compiles correctly on 5867 Solaris 2.5. 5868 5869e. Added `:' to the set of characters that cause word breaks for the 5870 completion code so that pathnames in assignments to $PATH can be 5871 completed. 5872 5873f. The `select' command was fixed to print $PS3 to stderr. 5874 5875g. Fixed an error in the manual page section describing the effect that 5876 setting and unsetting GLOBIGNORE has on the setting of the `dotglob' 5877 option. 5878 5879h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC 5880 on systems without gettimeofday() and resources. 5881 5882i. The getopt static variables are now initialized each time a subshell 5883 is started, so subshells using `getopts' work right. 5884 5885j. A sign-extension bug that caused a possible security hole was fixed. 5886 5887k. The parser now reads characters between backquotes within a double- 5888 quoted string as a single word, so double quotes in the backquoted 5889 string don't terminate the enclosing double-quoted string. 5890 5891l. A bug that caused `^O' to work incorrectly when typed as the first 5892 thing to an interactive shell was fixed. 5893 5894m. A rarely-exercised off-by-one error in the code that quotes variable 5895 values was fixed. 5896 5897n. Some memory and file descriptor leaks encountered when running a 5898 shell script that is executable but does not have a leading `#!' 5899 were plugged. 5900 59012. Changes to Readline 5902 5903a. A bug that sometimes caused incorrect results when trying to read 5904 typeahead on systems without FIONREAD was fixed. 5905 59063. New Features in Bash 5907 5908a. The command timing code now uses the value of the TIMEFORMAT variable 5909 to format and display timing statistics. 5910 5911b. The `time' reserved word now accepts a `-p' option to force the 5912 POSIX.2 output format. 5913 5914c. There are a couple of new and updated scripts to convert csh startup 5915 files to bash format. 5916 5917d. There is a new builtin array variable: BASH_VERSINFO. The various 5918 members hold the parts of the version information in BASH_VERSION, 5919 plus the value of MACHTYPE. 5920 59214. New Features in Readline 5922 5923a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter 5924 eight-bit mode. 5925 5926------------------------------------------------------------------------------ 5927This document details the changes between this version, bash-2.0-alpha4, 5928and the previous version, bash-2.0-alpha3. 5929 59301. Changes to Bash 5931 5932a. There is better detection of rsh connections on Solaris 2. 5933 5934b. Assignments to read-only variables preceding a command name are now 5935 variable assignment errors. Variable assignment errors cause 5936 non-interactive shells running in posix mode to exit. 5937 5938c. The word tokenizer was rewritten to handle nested quotes and pairs 5939 ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...)) 5940 correctly. Some of the parameter expansion code was updated as a 5941 consequence. 5942 5943d. A fix was made to `test' when given three arguments so that a binary 5944 operator is checked for first, before checking that the first argument 5945 is `!'. 5946 5947e. 2''>/dev/null is no longer equivalent to 2>/dev/null. 5948 5949f. Parser error messages were regularized, and in most cases the name of 5950 the shell script being read by a non-interactive shell is not printed 5951 twice. 5952 5953g. A fix was made to the completion code so that it no longer removes the 5954 text the user typed in some cases. 5955 5956h. The special glibc `getopt' environment variable is no longer put into 5957 the environment on machines with small values of ARG_MAX. 5958 5959i. The expansion of ${...} now follows the POSIX.2 rules for finding the 5960 closing `}'. 5961 5962j. The shell no longer displays spurious status messages for background 5963 jobs in shell scripts that complete successfully when the script is 5964 run from a terminal. 5965 5966k. `shopt -o' now correctly updates $SHELLOPTS. 5967 5968l. A bug that caused the $PATH searching code to return a non-executable 5969 file even when an executable file with the same name appeared later in 5970 $PATH was fixed. 5971 5972m. The shell now does tilde expansions on unquoted `:~' in assignment 5973 statements when not in posix mode. 5974 5975n. Variable assignment errors when a command consists only of assignments 5976 now cause non-interactive shells to exit when in posix mode. 5977 5978o. If the variable in a `for' or `select' command is read-only, or not a 5979 legal shell identifier, a variable assignment error occurs. 5980 5981p. `test' now handles `-a' and `-o' as binary operators when three arguments 5982 are supplied, and correctly parses `( word )' as equivalent to `word'. 5983 5984q. `test' was fixed so that file names of the form /dev/fd/NN mean the same 5985 thing on all systems, even Linux. 5986 5987r. Fixed a bug in the globbing code that caused patterns with multiple 5988 consecutive `*'s to not be matched correctly. 5989 5990s. Fixed a bug that caused $PS2 to not be printed when an interactive shell 5991 not using readline is reading a here document. 5992 5993t. Fixed a bug that caused history expansion to be performed inappropriately 5994 when a single-quoted string spanned more than one line. 5995 5996u. `getopts' now checks that the variable name passed by the user as the 5997 second argument is a legal shell identifier and that the variable is 5998 not read-only. 5999 6000v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it 6001 encounters an error. 6002 6003w. Fixed `set' to display variable values in a form that can be re-read. 6004 6005x. Fixed a bug in the code that keeps track of whether or not local variables 6006 have been declared at the current level of function nesting. 6007 6008y. Non-interactive shells in posix mode now exit if the name in a function 6009 declaration is not a legal identifier. 6010 6011z. The job control code now ignores stopped children when the shell is not 6012 interactive. 6013 6014aa. The `cd' builtin no longer attempts spelling correction on the directory 6015 name if the shell is not interactive, regardless of the setting of the 6016 `cdspell' option. 6017 6018bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2. 6019 6020cc. `time' now prints its output to stderr, as POSIX.2 specifies. 6021 60222. Fixes to Readline 6023 6024a. After printing possible completions, all lines of a multi-line prompt 6025 are redisplayed. 6026 6027b. Some changes were made to the terminal handling code in rltty.c to 6028 work around AIX 4.2 bugs. 6029 60303. New Features in Bash 6031 6032a. There is a new loadable builtin: sprintf, with calling syntax 6033 sprintf var format [args] 6034 This provides an easy way to simulate ksh left- and right-justified 6035 variable values. 6036 6037b. The expansions of \h and \H in prompt strings were swapped. \h now 6038 expands to the hostname up to the first `.', as in bash-1.14. 6039 60404. New Features in Readline 6041 6042a. The bash-1.14 behavior when ^M is typed while doing an incremental 6043 search was restored. ^J may now be used to terminate the search without 6044 accepting the line. 6045 6046b. There is a new bindable variable: disable-completion. This inhibits 6047 word completion and causes the completion character to be inserted as 6048 if it had been bound to self-insert. 6049 6050------------------------------------------------------------------------------ 6051This document details the changes between this version, bash-2.0-alpha3, 6052and the previous version, bash-2.0-alpha2. 6053 6054There is now a file `COMPAT' included in the distribution that lists the 6055user-visible incompatibilities between 1.14 and 2.0. 6056 60571. Changes to Bash 6058 6059a. Some work was done so that word splitting of the rhs of assignment 6060 statements conforms more closely to historical practice. 6061 6062b. A couple of errant memory frees were fixed. 6063 6064c. A fix was made to the test builtin so it recognizes `<' and `>' as 6065 binary operators. 6066 6067d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's 6068 allocated and freed. This is to catch callers that refer to freed 6069 memory or assume something about newly-allocated memory. 6070 6071e. Fixed a problem with conversion to 12-hour time in the prompt 6072 expansion code. 6073 6074f. Fixed a problem with configure's argument parsing order. Now you can 6075 correctly turn on specific options after using --enable-minimal-config. 6076 6077g. The configure script now automatically disables the use of GNU malloc 6078 on systems where it's appropriate (better than having people read the 6079 NOTES file and do it manually). 6080 6081h. There are new prompt expansions (\v and \V) to insert version information 6082 into the prompt strings. 6083 6084i. The default prompt string now includes the version number. 6085 6086j. Most of the builtins that take no options were changed to use the 6087 internal getopt so they can produce proper error messages for -? 6088 and incorrect options. 6089 6090k. Some system-specific changes were made for SVR4.2 and Solaris 2.5. 6091 6092l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of 6093 MAXNAMLEN. 6094 6095m. A couple of problems caused by uninitialized variables were fixed. 6096 6097n. There are a number of new loadable builtin examples: logname, basename, 6098 dirname, tty, pathchk, tee, head, and rmdir. All of these conform to 6099 POSIX.2. 6100 6101o. Bash now notices changes in TZ and calls tzset() if present, so 6102 changing TZ will alter the time printed by prompt expansions. 6103 6104p. The source was reorganized a bit so I don't have to wait so long for 6105 some files to compile, and to facilitate the creation of a `shell 6106 library' at some future point. 6107 6108q. Bash no longer turns off job control if called as `sh', since the 6109 POSIX.2 spec includes job control as a standard feature. 6110 6111r. `bash -o posix' now works as intended. 6112 6113s. Fixed a problem with the completion code: when completing a filename 6114 that contained globbing characters, if show-all-if-ambiguous was set, 6115 the completion code would remove the user's text. 6116 6117t. Fixed ulimit so that (hopefully) the full range of limits is available 6118 on HPUX systems. 6119 6120u. A new `shopt' option (`hostcomplete') enables and disables hostname 6121 completion. 6122 6123v. The shell no longer attempts to save the history on an abort(), 6124 which is usually called by programming_error(). 6125 6126w. The `-s' option to `fc' was changed to echo the command to be executed 6127 to stderr instead of stdout. 6128 6129x. If the editor invoked by `fc -e' exits with a non-zero status, no 6130 commands are executed. 6131 6132y. Fixed a bug that made the shopt `histverify' option work incorrectly. 6133 6134z. There is a new variable `MACHTYPE' whose value is the GNU-style 6135 `cpu-company-system' system description as set by configure. (The 6136 values of MACHTYPE and HOSTTYPE should really be swapped.) 6137 6138aa. The `ulimit' builtin now allows the maximum virtual memory size to be 6139 set via setrlimit(2) if RLIMIT_VMEM is defined. 6140 6141bb. `bash -nc 'command'' no longer runs `command'. 6142 61432. Changes to Readline 6144 6145a. Fixed a typo in the code that checked for FIONREAD in input.c. 6146 6147b. Fixed a bug in the code that outputs keybindings, so things like C-\ 6148 are quoted properly. 6149 6150c. Fixed a bug in the inputrc file parsing code to handle the problems 6151 caused by inputrc files created from the output of `bind -p' in 6152 previous versions of bash. The problem was due to the bug fixed 6153 in item b above. 6154 6155d. Readline no longer turns off the terminal's meta key, and turns it on 6156 once the first time it's called. 6157 6158------------------------------------------------------------------------------ 6159This file documents the changes between this version, bash-2.0-alpha2, 6160and the previous version, bash-2.0-alpha. 6161 61621. Changes to Bash 6163 6164a. The shell no longer thinks directories are executable. 6165 6166b. `disown' has a new option, `h', which inhibits the resending of SIGHUP 6167 but does not remove the job from the jobs table. 6168 6169c. The varargs functions in error.c now use ANSI-C `stdarg' if available. 6170 6171d. The build process now treats the `build version' in .build as local to 6172 the build directory, so different versions built from the same source 6173 tree have different `build versions'. 6174 6175e. Some problems with the grammar have been fixed. (It used `list' in a few 6176 productions where `compound_list' was needed. A `list' must be terminated 6177 with a newline or semicolon; a `compound_list' need not be.) 6178 6179f. A fix was made to keep `wait' from hanging when waiting for all background 6180 jobs. 6181 6182g. `bash --help' now writes its output to stdout, like the GNU Coding Standards 6183 specify, and includes the machine type (the value of MACHTYPE). 6184 6185h. `bash --version' now prints more information and exits successfully, like 6186 the GNU Coding Standards specify. 6187 6188i. The output of `time' and `times' now prints fractional seconds with three 6189 places after the decimal point. 6190 6191j. A bug that caused process substitutions to screw up the pipeline printed 6192 by `jobs' was fixed. 6193 6194k. Fixes were made to the code that implements $'...' and $"..." so they 6195 work as documented. 6196 6197l. The process substitution code now opens named pipes for reading with 6198 O_NONBLOCK to avoid hanging. 6199 6200m. Fixes were made to the trap code so the shell cleans up correctly if the 6201 trap command contains a `return' and we're executing a function or 6202 sourcing a script with `.'. 6203 6204n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the 6205 documentation (ps, dvi, etc.) on a `make install'. 6206 6207o. Fixed an auto-increment error that caused bash -c args to sometimes dump 6208 core. 6209 6210p. Fixed a bug that caused $HISTIGNORE to fail when the history line 6211 contained globbing characters. 6212 62132. Changes to Readline 6214 6215a. There is a new string variable, rl_library_version, available for use by 6216 applications. The current value is "2.1". 6217 6218b. A bug encountered when expand-tilde was enabled and file completion was 6219 attempted on a word beginning with `~/' was fixed. 6220 6221c. A slight change was made to the incremental search termination behavior. 6222 ESC still terminates the search, but if input is pending or arrives 6223 within 0.1 seconds (on systems with select(2)), it is used as a prefix 6224 character. This is intented to allow users to terminate searches with 6225 the arrow keys and get the behavior they expect. 6226