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1This document details the changes between this version, readline-4.0, 2and the previous version, readline-2.2. 3 41. Changes to Readline 5 6a. The version number is now 4.0, to match the major and minor version 7 numbers on the shared readline and history libraries. Future 8 releases will maintain the identical numbering. 9 10b. Fixed a typo in the `make install' recipe that copied libreadline.a 11 to libhistory.old right after installing it. 12 13c. The readline and history info files are now installed out of the source 14 directory if they are not found in the build directory. 15 16d. The library no longer exports a function named `savestring' -- backwards 17 compatibility be damned. 18 19e. There is no longer any #ifdef SHELL code in the source files. 20 21f. Some changes were made to the key binding code to fix memory leaks and 22 better support Win32 systems. 23 24g. Fixed a silly typo in the paren matching code -- it's microseconds, not 25 milliseconds. 26 27h. The readline library should be compilable by C++ compilers. 28 29i. The readline.h public header file now includes function prototypes for 30 all readline functions, and some changes were made to fix errors in the 31 source files uncovered by the use of prototypes. 32 33j. The maximum numeric argument is now clamped at 1000000. 34 35k. Fixes to rl_yank_last_arg to make it behave better. 36 37l. Fixed a bug in the display code that caused core dumps if the prompt 38 string length exceeded 1024 characters. 39 40m. The menu completion code was fixed to properly insert a single completion 41 if there is only one match. 42 43n. A bug was fixed that caused the display code to improperly display tabs 44 after newlines. 45 46o. A fix was made to the completion code in which a typo caused the wrong 47 value to be passed to the function that computed the longest common 48 prefix of the list of matches. 49 50p. The completion code now checks the value of rl_filename_completion_desired, 51 which is set by application-supplied completion functions to indicate 52 that filename completion is being performed, to decide whether or not to 53 call an application-supplied `ignore completions' function. 54 55q. Code was added to the history library to catch history substitutions 56 using `&' without a previous history substitution or search having been 57 performed. 58 59 602. New Features in Readline 61 62a. There is a new script, support/shobj-conf, to do system-specific shared 63 object and library configuration. It generates variables for configure 64 to substitute into makefiles. The README file provides a detailed 65 explanation of the shared library creation process. 66 67b. Shared libraries and objects are now built in the `shlib' subdirectory. 68 There is a shlib/Makefile.in to control the build process. `make shared' 69 from the top-level directory is still the right way to build shared 70 versions of the libraries. 71 72c. rlconf.h is now installed, so applications can find out which features 73 have been compiled into the installed readline and history libraries. 74 75d. rlstdc.h is now an installed header file. 76 77e. Many changes to the signal handling: 78 o Readline now catches SIGQUIT and cleans up the tty before returning; 79 o A new variable, rl_catch_signals, is available to application writers 80 to indicate to readline whether or not it should install its own 81 signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, 82 SIGTTIN, and SIGTTOU; 83 o A new variable, rl_catch_sigwinch, is available to application 84 writers to indicate to readline whether or not it should install its 85 own signal handler for SIGWINCH, which will chain to the calling 86 applications's SIGWINCH handler, if one is installed; 87 o There is a new function, rl_free_line_state, for application signal 88 handlers to call to free up the state associated with the current 89 line after receiving a signal; 90 o There is a new function, rl_cleanup_after_signal, to clean up the 91 display and terminal state after receiving a signal; 92 o There is a new function, rl_reset_after_signal, to reinitialize the 93 terminal and display state after an application signal handler 94 returns and readline continues 95 96f. There is a new function, rl_resize_terminal, to reset readline's idea of 97 the screen size after a SIGWINCH. 98 99g. New public functions: rl_save_prompt and rl_restore_prompt. These were 100 previously private functions with a `_' prefix. These functions are 101 used when an application wants to write a message to the `message area' 102 with rl_message and have the prompt restored correctly when the message 103 is erased. 104 105h. New function hook: rl_pre_input_hook, called just before readline starts 106 reading input, after initialization. 107 108i. New function hook: rl_display_matches_hook, called when readline would 109 display the list of completion matches. The new function 110 rl_display_match_list is what readline uses internally, and is available 111 for use by application functions called via this hook. 112 113j. New bindable function, delete-char-or-list, like tcsh. 114 115k. A new variable, rl_erase_empty_line, which, if set by an application using 116 readline, will cause readline to erase, prompt and all, lines on which the 117 only thing typed was a newline. 118 119l. There is a new script, support/shlib-install, to install and uninstall 120 the shared readline and history libraries. 121 122m. A new bindable variable, `isearch-terminators', which is a string 123 containing the set of characters that should terminate an incremental 124 search without being executed as a command. 125 126n. A new bindable function, forward-backward-delete-char. 127 128------------------------------------------------------------------------------- 129This document details the changes between this version, readline-2.2, 130and the previous version, readline-2.1. 131 1321. Changes to Readline 133 134a. Added a missing `extern' to a declaration in readline.h that kept 135 readline from compiling cleanly on some systems. 136 137b. The history file is now opened with mode 0600 when it is written for 138 better security. 139 140c. Changes were made to the SIGWINCH handling code so that prompt redisplay 141 is done better. 142 143d. ^G now interrupts incremental searches correctly. 144 145e. A bug that caused a core dump when the set of characters to be quoted 146 when completing words was empty was fixed. 147 148f. Fixed a problem in the readline test program rltest.c that caused a core 149 dump. 150 151g. The code that handles parser directives in inputrc files now displays 152 more error messages. 153 154h. The history expansion code was fixed so that the appearance of the 155 history comment character at the beginning of a word inhibits history 156 expansion for that word and the rest of the input line. 157 158i. The code that prints completion listings now behaves better if one or 159 more of the filenames contains non-printable characters. 160 161j. The time delay when showing matching parentheses is now 0.5 seconds. 162 163 1642. New Features in Readline 165 166a. There is now an option for `iterative' yank-last-arg handline, so a user 167 can keep entering `M-.', yanking the last argument of successive history 168 lines. 169 170b. New variable, `print-completions-horizontally', which causes completion 171 matches to be displayed across the screen (like `ls -x') rather than up 172 and down the screen (like `ls'). 173 174c. New variable, `completion-ignore-case', which causes filename completion 175 and matching to be performed case-insensitively. 176 177d. There is a new bindable command, `magic-space', which causes history 178 expansion to be performed on the current readline buffer and a space to 179 be inserted into the result. 180 181e. There is a new bindable command, `menu-complete', which enables tcsh-like 182 menu completion (successive executions of menu-complete insert a single 183 completion match, cycling through the list of possible completions). 184 185f. There is a new bindable command, `paste-from-clipboard', for use on Win32 186 systems, to insert the text from the Win32 clipboard into the editing 187 buffer. 188 189g. The key sequence translation code now understands printf-style backslash 190 escape sequences, including \NNN octal escapes. These escape sequences 191 may be used in key sequence definitions or macro values. 192 193h. An `$include' inputrc file parser directive has been added. 194