1/* $NetBSD: readline.c,v 1.90 2010/08/04 20:29:18 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jaromir Dolecek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__RCSID("$NetBSD: readline.c,v 1.90 2010/08/04 20:29:18 christos Exp $"); 34__FBSDID("$FreeBSD$"); 35 36#include <sys/types.h> 37#include <sys/stat.h> 38#include <stdio.h> 39#include <dirent.h> 40#include <string.h> 41#include <pwd.h> 42#include <ctype.h> 43#include <stdlib.h> 44#include <unistd.h> 45#include <limits.h> 46#include <errno.h> 47#include <fcntl.h> 48#include <setjmp.h> 49#include <vis.h> 50#include "sys.h" 51#include "readline/readline.h" 52#include "chartype.h" 53#include "el.h" 54#include "fcns.h" /* for EL_NUM_FCNS */ 55#include "histedit.h" 56#include "filecomplete.h" 57 58void rl_prep_terminal(int); 59void rl_deprep_terminal(void); 60 61/* for rl_complete() */ 62#define TAB '\r' 63 64/* see comment at the #ifdef for sense of this */ 65/* #define GDB_411_HACK */ 66 67/* readline compatibility stuff - look at readline sources/documentation */ 68/* to see what these variables mean */ 69const char *rl_library_version = "EditLine wrapper"; 70int rl_readline_version = RL_READLINE_VERSION; 71static char empty[] = { '\0' }; 72static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 73static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 74 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 75char *rl_readline_name = empty; 76FILE *rl_instream = NULL; 77FILE *rl_outstream = NULL; 78int rl_point = 0; 79int rl_end = 0; 80char *rl_line_buffer = NULL; 81VCPFunction *rl_linefunc = NULL; 82int rl_done = 0; 83VFunction *rl_event_hook = NULL; 84KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 85 emacs_meta_keymap, 86 emacs_ctlx_keymap; 87 88int history_base = 1; /* probably never subject to change */ 89int history_length = 0; 90int max_input_history = 0; 91char history_expansion_char = '!'; 92char history_subst_char = '^'; 93char *history_no_expand_chars = expand_chars; 94Function *history_inhibit_expansion_function = NULL; 95char *history_arg_extract(int start, int end, const char *str); 96 97int rl_inhibit_completion = 0; 98int rl_attempted_completion_over = 0; 99char *rl_basic_word_break_characters = break_chars; 100char *rl_completer_word_break_characters = NULL; 101char *rl_completer_quote_characters = NULL; 102Function *rl_completion_entry_function = NULL; 103CPPFunction *rl_attempted_completion_function = NULL; 104Function *rl_pre_input_hook = NULL; 105Function *rl_startup1_hook = NULL; 106int (*rl_getc_function)(FILE *) = NULL; 107char *rl_terminal_name = NULL; 108int rl_already_prompted = 0; 109int rl_filename_completion_desired = 0; 110int rl_ignore_completion_duplicates = 0; 111int rl_catch_signals = 1; 112int readline_echoing_p = 1; 113int _rl_print_completions_horizontally = 0; 114VFunction *rl_redisplay_function = NULL; 115Function *rl_startup_hook = NULL; 116VFunction *rl_completion_display_matches_hook = NULL; 117VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 118VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 119KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 120 121#ifdef WIDECHAR 122static ct_buffer_t conv; 123#endif 124 125/* 126 * The current prompt string. 127 */ 128char *rl_prompt = NULL; 129/* 130 * This is set to character indicating type of completion being done by 131 * rl_complete_internal(); this is available for application completion 132 * functions. 133 */ 134int rl_completion_type = 0; 135 136/* 137 * If more than this number of items results from query for possible 138 * completions, we ask user if they are sure to really display the list. 139 */ 140int rl_completion_query_items = 100; 141 142/* 143 * List of characters which are word break characters, but should be left 144 * in the parsed text when it is passed to the completion function. 145 * Shell uses this to help determine what kind of completing to do. 146 */ 147char *rl_special_prefixes = NULL; 148 149/* 150 * This is the character appended to the completed words if at the end of 151 * the line. Default is ' ' (a space). 152 */ 153int rl_completion_append_character = ' '; 154 155/* stuff below is used internally by libedit for readline emulation */ 156 157static TYPE(History) *h = NULL; 158static EditLine *e = NULL; 159static Function *map[256]; 160static jmp_buf topbuf; 161 162/* internal functions */ 163static unsigned char _el_rl_complete(EditLine *, int); 164static unsigned char _el_rl_tstp(EditLine *, int); 165static char *_get_prompt(EditLine *); 166static int _getc_function(EditLine *, char *); 167static HIST_ENTRY *_move_history(int); 168static int _history_expand_command(const char *, size_t, size_t, 169 char **); 170static char *_rl_compat_sub(const char *, const char *, 171 const char *, int); 172static int _rl_event_read_char(EditLine *, char *); 173static void _rl_update_pos(void); 174 175 176/* ARGSUSED */ 177static char * 178_get_prompt(EditLine *el __attribute__((__unused__))) 179{ 180 rl_already_prompted = 1; 181 return (rl_prompt); 182} 183 184 185/* 186 * generic function for moving around history 187 */ 188static HIST_ENTRY * 189_move_history(int op) 190{ 191 TYPE(HistEvent) ev; 192 static HIST_ENTRY rl_he; 193 194 if (FUNW(history)(h, &ev, op) != 0) 195 return (HIST_ENTRY *) NULL; 196 197 rl_he.line = ct_encode_string(ev.str, &conv); 198 rl_he.data = NULL; 199 200 return (&rl_he); 201} 202 203 204/* 205 * read one key from user defined input function 206 */ 207static int 208/*ARGSUSED*/ 209_getc_function(EditLine *el, char *c) 210{ 211 int i; 212 213 i = (*rl_getc_function)(NULL); 214 if (i == -1) 215 return 0; 216 *c = i; 217 return 1; 218} 219 220static const char _dothistory[] = "/.history"; 221 222static const char * 223_default_history_file(void) 224{ 225 struct passwd *p; 226 static char path[PATH_MAX]; 227 228 if (*path) 229 return path; 230 if ((p = getpwuid(getuid())) == NULL) 231 return NULL; 232 strlcpy(path, p->pw_dir, PATH_MAX); 233 strlcat(path, _dothistory, PATH_MAX); 234 return path; 235} 236 237/* 238 * READLINE compatibility stuff 239 */ 240 241/* 242 * Set the prompt 243 */ 244int 245rl_set_prompt(const char *prompt) 246{ 247 char *p; 248 249 if (!prompt) 250 prompt = ""; 251 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 252 return 0; 253 if (rl_prompt) 254 free(rl_prompt); 255 rl_prompt = strdup(prompt); 256 if (rl_prompt == NULL) 257 return -1; 258 259 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 260 *p = RL_PROMPT_START_IGNORE; 261 262 return 0; 263} 264 265/* 266 * initialize rl compat stuff 267 */ 268int 269rl_initialize(void) 270{ 271 TYPE(HistEvent) ev; 272 const LineInfo *li; 273 int editmode = 1; 274 struct termios t; 275 276 if (e != NULL) 277 el_end(e); 278 if (h != NULL) 279 FUN(history,end)(h); 280 281 if (!rl_instream) 282 rl_instream = stdin; 283 if (!rl_outstream) 284 rl_outstream = stdout; 285 286 /* 287 * See if we don't really want to run the editor 288 */ 289 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 290 editmode = 0; 291 292 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 293 294 if (!editmode) 295 FUN(el,set)(e, EL_EDITMODE, 0); 296 297 h = FUN(history,init)(); 298 if (!e || !h) 299 return (-1); 300 301 FUNW(history)(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 302 history_length = 0; 303 max_input_history = INT_MAX; 304 el_set(e, EL_HIST, history, h); 305 306 /* setup getc function if valid */ 307 if (rl_getc_function) 308 el_set(e, EL_GETCFN, _getc_function); 309 310 /* for proper prompt printing in readline() */ 311 if (rl_set_prompt("") == -1) { 312 FUN(history,end)(h); 313 el_end(e); 314 return -1; 315 } 316 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 317 el_set(e, EL_SIGNAL, rl_catch_signals); 318 319 /* set default mode to "emacs"-style and read setting afterwards */ 320 /* so this can be overriden */ 321 el_set(e, EL_EDITOR, "emacs"); 322 if (rl_terminal_name != NULL) 323 el_set(e, EL_TERMINAL, rl_terminal_name); 324 else 325 el_get(e, EL_TERMINAL, &rl_terminal_name); 326 327 /* 328 * Word completion - this has to go AFTER rebinding keys 329 * to emacs-style. 330 */ 331 el_set(e, EL_ADDFN, "rl_complete", 332 "ReadLine compatible completion function", 333 _el_rl_complete); 334 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 335 336 /* 337 * Send TSTP when ^Z is pressed. 338 */ 339 el_set(e, EL_ADDFN, "rl_tstp", 340 "ReadLine compatible suspend function", 341 _el_rl_tstp); 342 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 343 344 /* read settings from configuration file */ 345 el_source(e, NULL); 346 347 /* 348 * Unfortunately, some applications really do use rl_point 349 * and rl_line_buffer directly. 350 */ 351 li = el_line(e); 352 /* a cheesy way to get rid of const cast. */ 353 rl_line_buffer = memchr(li->buffer, *li->buffer, 1); 354 _rl_update_pos(); 355 356 if (rl_startup_hook) 357 (*rl_startup_hook)(NULL, 0); 358 359 return (0); 360} 361 362 363/* 364 * read one line from input stream and return it, chomping 365 * trailing newline (if there is any) 366 */ 367char * 368readline(const char *p) 369{ 370 TYPE(HistEvent) ev; 371 const char * volatile prompt = p; 372 int count; 373 const char *ret; 374 char *buf; 375 static int used_event_hook; 376 377 if (e == NULL || h == NULL) 378 rl_initialize(); 379 380 rl_done = 0; 381 382 (void)setjmp(topbuf); 383 384 /* update prompt accordingly to what has been passed */ 385 if (rl_set_prompt(prompt) == -1) 386 return NULL; 387 388 if (rl_pre_input_hook) 389 (*rl_pre_input_hook)(NULL, 0); 390 391 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 392 el_set(e, EL_GETCFN, _rl_event_read_char); 393 used_event_hook = 1; 394 } 395 396 if (!rl_event_hook && used_event_hook) { 397 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 398 used_event_hook = 0; 399 } 400 401 rl_already_prompted = 0; 402 403 /* get one line from input stream */ 404 ret = el_gets(e, &count); 405 406 if (ret && count > 0) { 407 int lastidx; 408 409 buf = strdup(ret); 410 if (buf == NULL) 411 return NULL; 412 lastidx = count - 1; 413 if (buf[lastidx] == '\n') 414 buf[lastidx] = '\0'; 415 } else 416 buf = NULL; 417 418 FUNW(history)(h, &ev, H_GETSIZE); 419 history_length = ev.num; 420 421 return buf; 422} 423 424/* 425 * history functions 426 */ 427 428/* 429 * is normally called before application starts to use 430 * history expansion functions 431 */ 432void 433using_history(void) 434{ 435 if (h == NULL || e == NULL) 436 rl_initialize(); 437} 438 439 440/* 441 * substitute ``what'' with ``with'', returning resulting string; if 442 * globally == 1, substitutes all occurrences of what, otherwise only the 443 * first one 444 */ 445static char * 446_rl_compat_sub(const char *str, const char *what, const char *with, 447 int globally) 448{ 449 const char *s; 450 char *r, *result; 451 size_t len, with_len, what_len; 452 453 len = strlen(str); 454 with_len = strlen(with); 455 what_len = strlen(what); 456 457 /* calculate length we need for result */ 458 s = str; 459 while (*s) { 460 if (*s == *what && !strncmp(s, what, what_len)) { 461 len += with_len - what_len; 462 if (!globally) 463 break; 464 s += what_len; 465 } else 466 s++; 467 } 468 r = result = malloc(len + 1); 469 if (result == NULL) 470 return NULL; 471 s = str; 472 while (*s) { 473 if (*s == *what && !strncmp(s, what, what_len)) { 474 (void)strncpy(r, with, with_len); 475 r += with_len; 476 s += what_len; 477 if (!globally) { 478 (void)strcpy(r, s); 479 return(result); 480 } 481 } else 482 *r++ = *s++; 483 } 484 *r = '\0'; 485 return(result); 486} 487 488static char *last_search_pat; /* last !?pat[?] search pattern */ 489static char *last_search_match; /* last !?pat[?] that matched */ 490 491const char * 492get_history_event(const char *cmd, int *cindex, int qchar) 493{ 494 int idx, sign, sub, num, begin, ret; 495 size_t len; 496 char *pat; 497 const char *rptr; 498 TYPE(HistEvent) ev; 499 500 idx = *cindex; 501 if (cmd[idx++] != history_expansion_char) 502 return(NULL); 503 504 /* find out which event to take */ 505 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 506 if (FUNW(history)(h, &ev, H_FIRST) != 0) 507 return(NULL); 508 *cindex = cmd[idx]? (idx + 1):idx; 509 return ct_encode_string(ev.str, &conv); 510 } 511 sign = 0; 512 if (cmd[idx] == '-') { 513 sign = 1; 514 idx++; 515 } 516 517 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 518 HIST_ENTRY *rl_he; 519 520 num = 0; 521 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 522 num = num * 10 + cmd[idx] - '0'; 523 idx++; 524 } 525 if (sign) 526 num = history_length - num + 1; 527 528 if (!(rl_he = history_get(num))) 529 return(NULL); 530 531 *cindex = idx; 532 return(rl_he->line); 533 } 534 sub = 0; 535 if (cmd[idx] == '?') { 536 sub = 1; 537 idx++; 538 } 539 begin = idx; 540 while (cmd[idx]) { 541 if (cmd[idx] == '\n') 542 break; 543 if (sub && cmd[idx] == '?') 544 break; 545 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 546 || cmd[idx] == '\t' || cmd[idx] == qchar)) 547 break; 548 idx++; 549 } 550 len = idx - begin; 551 if (sub && cmd[idx] == '?') 552 idx++; 553 if (sub && len == 0 && last_search_pat && *last_search_pat) 554 pat = last_search_pat; 555 else if (len == 0) 556 return(NULL); 557 else { 558 if ((pat = malloc(len + 1)) == NULL) 559 return NULL; 560 (void)strncpy(pat, cmd + begin, len); 561 pat[len] = '\0'; 562 } 563 564 if (FUNW(history)(h, &ev, H_CURR) != 0) { 565 if (pat != last_search_pat) 566 free(pat); 567 return (NULL); 568 } 569 num = ev.num; 570 571 if (sub) { 572 if (pat != last_search_pat) { 573 if (last_search_pat) 574 free(last_search_pat); 575 last_search_pat = pat; 576 } 577 ret = history_search(pat, -1); 578 } else 579 ret = history_search_prefix(pat, -1); 580 581 if (ret == -1) { 582 /* restore to end of list on failed search */ 583 FUNW(history)(h, &ev, H_FIRST); 584 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 585 if (pat != last_search_pat) 586 free(pat); 587 return(NULL); 588 } 589 590 if (sub && len) { 591 if (last_search_match && last_search_match != pat) 592 free(last_search_match); 593 last_search_match = pat; 594 } 595 596 if (pat != last_search_pat) 597 free(pat); 598 599 if (FUNW(history)(h, &ev, H_CURR) != 0) 600 return(NULL); 601 *cindex = idx; 602 rptr = ct_encode_string(ev.str, &conv); 603 604 /* roll back to original position */ 605 (void)FUNW(history)(h, &ev, H_SET, num); 606 607 return rptr; 608} 609 610/* 611 * the real function doing history expansion - takes as argument command 612 * to do and data upon which the command should be executed 613 * does expansion the way I've understood readline documentation 614 * 615 * returns 0 if data was not modified, 1 if it was and 2 if the string 616 * should be only printed and not executed; in case of error, 617 * returns -1 and *result points to NULL 618 * it's callers responsibility to free() string returned in *result 619 */ 620static int 621_history_expand_command(const char *command, size_t offs, size_t cmdlen, 622 char **result) 623{ 624 char *tmp, *search = NULL, *aptr; 625 const char *ptr, *cmd; 626 static char *from = NULL, *to = NULL; 627 int start, end, idx, has_mods = 0; 628 int p_on = 0, g_on = 0; 629 630 *result = NULL; 631 aptr = NULL; 632 ptr = NULL; 633 634 /* First get event specifier */ 635 idx = 0; 636 637 if (strchr(":^*$", command[offs + 1])) { 638 char str[4]; 639 /* 640 * "!:" is shorthand for "!!:". 641 * "!^", "!*" and "!$" are shorthand for 642 * "!!:^", "!!:*" and "!!:$" respectively. 643 */ 644 str[0] = str[1] = '!'; 645 str[2] = '0'; 646 ptr = get_history_event(str, &idx, 0); 647 idx = (command[offs + 1] == ':')? 1:0; 648 has_mods = 1; 649 } else { 650 if (command[offs + 1] == '#') { 651 /* use command so far */ 652 if ((aptr = malloc(offs + 1)) == NULL) 653 return -1; 654 (void)strncpy(aptr, command, offs); 655 aptr[offs] = '\0'; 656 idx = 1; 657 } else { 658 int qchar; 659 660 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 661 ptr = get_history_event(command + offs, &idx, qchar); 662 } 663 has_mods = command[offs + idx] == ':'; 664 } 665 666 if (ptr == NULL && aptr == NULL) 667 return(-1); 668 669 if (!has_mods) { 670 *result = strdup(aptr ? aptr : ptr); 671 if (aptr) 672 free(aptr); 673 if (*result == NULL) 674 return -1; 675 return(1); 676 } 677 678 cmd = command + offs + idx + 1; 679 680 /* Now parse any word designators */ 681 682 if (*cmd == '%') /* last word matched by ?pat? */ 683 tmp = strdup(last_search_match? last_search_match:""); 684 else if (strchr("^*$-0123456789", *cmd)) { 685 start = end = -1; 686 if (*cmd == '^') 687 start = end = 1, cmd++; 688 else if (*cmd == '$') 689 start = -1, cmd++; 690 else if (*cmd == '*') 691 start = 1, cmd++; 692 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 693 start = 0; 694 while (*cmd && '0' <= *cmd && *cmd <= '9') 695 start = start * 10 + *cmd++ - '0'; 696 697 if (*cmd == '-') { 698 if (isdigit((unsigned char) cmd[1])) { 699 cmd++; 700 end = 0; 701 while (*cmd && '0' <= *cmd && *cmd <= '9') 702 end = end * 10 + *cmd++ - '0'; 703 } else if (cmd[1] == '$') { 704 cmd += 2; 705 end = -1; 706 } else { 707 cmd++; 708 end = -2; 709 } 710 } else if (*cmd == '*') 711 end = -1, cmd++; 712 else 713 end = start; 714 } 715 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 716 if (tmp == NULL) { 717 (void)fprintf(rl_outstream, "%s: Bad word specifier", 718 command + offs + idx); 719 if (aptr) 720 free(aptr); 721 return(-1); 722 } 723 } else 724 tmp = strdup(aptr? aptr:ptr); 725 726 if (aptr) 727 free(aptr); 728 729 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 730 *result = tmp; 731 return(1); 732 } 733 734 for (; *cmd; cmd++) { 735 if (*cmd == ':') 736 continue; 737 else if (*cmd == 'h') { /* remove trailing path */ 738 if ((aptr = strrchr(tmp, '/')) != NULL) 739 *aptr = '\0'; 740 } else if (*cmd == 't') { /* remove leading path */ 741 if ((aptr = strrchr(tmp, '/')) != NULL) { 742 aptr = strdup(aptr + 1); 743 free(tmp); 744 tmp = aptr; 745 } 746 } else if (*cmd == 'r') { /* remove trailing suffix */ 747 if ((aptr = strrchr(tmp, '.')) != NULL) 748 *aptr = '\0'; 749 } else if (*cmd == 'e') { /* remove all but suffix */ 750 if ((aptr = strrchr(tmp, '.')) != NULL) { 751 aptr = strdup(aptr); 752 free(tmp); 753 tmp = aptr; 754 } 755 } else if (*cmd == 'p') /* print only */ 756 p_on = 1; 757 else if (*cmd == 'g') 758 g_on = 2; 759 else if (*cmd == 's' || *cmd == '&') { 760 char *what, *with, delim; 761 size_t len, from_len; 762 size_t size; 763 764 if (*cmd == '&' && (from == NULL || to == NULL)) 765 continue; 766 else if (*cmd == 's') { 767 delim = *(++cmd), cmd++; 768 size = 16; 769 what = realloc(from, size); 770 if (what == NULL) { 771 free(from); 772 free(tmp); 773 return 0; 774 } 775 len = 0; 776 for (; *cmd && *cmd != delim; cmd++) { 777 if (*cmd == '\\' && cmd[1] == delim) 778 cmd++; 779 if (len >= size) { 780 char *nwhat; 781 nwhat = realloc(what, 782 (size <<= 1)); 783 if (nwhat == NULL) { 784 free(what); 785 free(tmp); 786 return 0; 787 } 788 what = nwhat; 789 } 790 what[len++] = *cmd; 791 } 792 what[len] = '\0'; 793 from = what; 794 if (*what == '\0') { 795 free(what); 796 if (search) { 797 from = strdup(search); 798 if (from == NULL) { 799 free(tmp); 800 return 0; 801 } 802 } else { 803 from = NULL; 804 free(tmp); 805 return (-1); 806 } 807 } 808 cmd++; /* shift after delim */ 809 if (!*cmd) 810 continue; 811 812 size = 16; 813 with = realloc(to, size); 814 if (with == NULL) { 815 free(to); 816 free(tmp); 817 return -1; 818 } 819 len = 0; 820 from_len = strlen(from); 821 for (; *cmd && *cmd != delim; cmd++) { 822 if (len + from_len + 1 >= size) { 823 char *nwith; 824 size += from_len + 1; 825 nwith = realloc(with, size); 826 if (nwith == NULL) { 827 free(with); 828 free(tmp); 829 return -1; 830 } 831 with = nwith; 832 } 833 if (*cmd == '&') { 834 /* safe */ 835 (void)strcpy(&with[len], from); 836 len += from_len; 837 continue; 838 } 839 if (*cmd == '\\' 840 && (*(cmd + 1) == delim 841 || *(cmd + 1) == '&')) 842 cmd++; 843 with[len++] = *cmd; 844 } 845 with[len] = '\0'; 846 to = with; 847 } 848 849 aptr = _rl_compat_sub(tmp, from, to, g_on); 850 if (aptr) { 851 free(tmp); 852 tmp = aptr; 853 } 854 g_on = 0; 855 } 856 } 857 *result = tmp; 858 return (p_on? 2:1); 859} 860 861 862/* 863 * csh-style history expansion 864 */ 865int 866history_expand(char *str, char **output) 867{ 868 int ret = 0; 869 size_t idx, i, size; 870 char *tmp, *result; 871 872 if (h == NULL || e == NULL) 873 rl_initialize(); 874 875 if (history_expansion_char == 0) { 876 *output = strdup(str); 877 return(0); 878 } 879 880 *output = NULL; 881 if (str[0] == history_subst_char) { 882 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 883 *output = malloc(strlen(str) + 4 + 1); 884 if (*output == NULL) 885 return 0; 886 (*output)[0] = (*output)[1] = history_expansion_char; 887 (*output)[2] = ':'; 888 (*output)[3] = 's'; 889 (void)strcpy((*output) + 4, str); 890 str = *output; 891 } else { 892 *output = strdup(str); 893 if (*output == NULL) 894 return 0; 895 } 896 897#define ADD_STRING(what, len, fr) \ 898 { \ 899 if (idx + len + 1 > size) { \ 900 char *nresult = realloc(result, (size += len + 1));\ 901 if (nresult == NULL) { \ 902 free(*output); \ 903 if (/*CONSTCOND*/fr) \ 904 free(tmp); \ 905 return 0; \ 906 } \ 907 result = nresult; \ 908 } \ 909 (void)strncpy(&result[idx], what, len); \ 910 idx += len; \ 911 result[idx] = '\0'; \ 912 } 913 914 result = NULL; 915 size = idx = 0; 916 tmp = NULL; 917 for (i = 0; str[i];) { 918 int qchar, loop_again; 919 size_t len, start, j; 920 921 qchar = 0; 922 loop_again = 1; 923 start = j = i; 924loop: 925 for (; str[j]; j++) { 926 if (str[j] == '\\' && 927 str[j + 1] == history_expansion_char) { 928 (void)strcpy(&str[j], &str[j + 1]); 929 continue; 930 } 931 if (!loop_again) { 932 if (isspace((unsigned char) str[j]) 933 || str[j] == qchar) 934 break; 935 } 936 if (str[j] == history_expansion_char 937 && !strchr(history_no_expand_chars, str[j + 1]) 938 && (!history_inhibit_expansion_function || 939 (*history_inhibit_expansion_function)(str, 940 (int)j) == 0)) 941 break; 942 } 943 944 if (str[j] && loop_again) { 945 i = j; 946 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 947 j++; 948 if (str[j] == history_expansion_char) 949 j++; 950 loop_again = 0; 951 goto loop; 952 } 953 len = i - start; 954 ADD_STRING(&str[start], len, 0); 955 956 if (str[i] == '\0' || str[i] != history_expansion_char) { 957 len = j - i; 958 ADD_STRING(&str[i], len, 0); 959 if (start == 0) 960 ret = 0; 961 else 962 ret = 1; 963 break; 964 } 965 ret = _history_expand_command (str, i, (j - i), &tmp); 966 if (ret > 0 && tmp) { 967 len = strlen(tmp); 968 ADD_STRING(tmp, len, 1); 969 } 970 if (tmp) { 971 free(tmp); 972 tmp = NULL; 973 } 974 i = j; 975 } 976 977 /* ret is 2 for "print only" option */ 978 if (ret == 2) { 979 add_history(result); 980#ifdef GDB_411_HACK 981 /* gdb 4.11 has been shipped with readline, where */ 982 /* history_expand() returned -1 when the line */ 983 /* should not be executed; in readline 2.1+ */ 984 /* it should return 2 in such a case */ 985 ret = -1; 986#endif 987 } 988 free(*output); 989 *output = result; 990 991 return (ret); 992} 993 994/* 995* Return a string consisting of arguments of "str" from "start" to "end". 996*/ 997char * 998history_arg_extract(int start, int end, const char *str) 999{ 1000 size_t i, len, max; 1001 char **arr, *result = NULL; 1002 1003 arr = history_tokenize(str); 1004 if (!arr) 1005 return NULL; 1006 if (arr && *arr == NULL) 1007 goto out; 1008 1009 for (max = 0; arr[max]; max++) 1010 continue; 1011 max--; 1012 1013 if (start == '$') 1014 start = (int)max; 1015 if (end == '$') 1016 end = (int)max; 1017 if (end < 0) 1018 end = (int)max + end + 1; 1019 if (start < 0) 1020 start = end; 1021 1022 if (start < 0 || end < 0 || (size_t)start > max || 1023 (size_t)end > max || start > end) 1024 goto out; 1025 1026 for (i = start, len = 0; i <= (size_t)end; i++) 1027 len += strlen(arr[i]) + 1; 1028 len++; 1029 result = malloc(len); 1030 if (result == NULL) 1031 goto out; 1032 1033 for (i = start, len = 0; i <= (size_t)end; i++) { 1034 (void)strcpy(result + len, arr[i]); 1035 len += strlen(arr[i]); 1036 if (i < (size_t)end) 1037 result[len++] = ' '; 1038 } 1039 result[len] = '\0'; 1040 1041out: 1042 for (i = 0; arr[i]; i++) 1043 free(arr[i]); 1044 free(arr); 1045 1046 return result; 1047} 1048 1049/* 1050 * Parse the string into individual tokens, 1051 * similar to how shell would do it. 1052 */ 1053char ** 1054history_tokenize(const char *str) 1055{ 1056 int size = 1, idx = 0, i, start; 1057 size_t len; 1058 char **result = NULL, *temp, delim = '\0'; 1059 1060 for (i = 0; str[i];) { 1061 while (isspace((unsigned char) str[i])) 1062 i++; 1063 start = i; 1064 for (; str[i];) { 1065 if (str[i] == '\\') { 1066 if (str[i+1] != '\0') 1067 i++; 1068 } else if (str[i] == delim) 1069 delim = '\0'; 1070 else if (!delim && 1071 (isspace((unsigned char) str[i]) || 1072 strchr("()<>;&|$", str[i]))) 1073 break; 1074 else if (!delim && strchr("'`\"", str[i])) 1075 delim = str[i]; 1076 if (str[i]) 1077 i++; 1078 } 1079 1080 if (idx + 2 >= size) { 1081 char **nresult; 1082 size <<= 1; 1083 nresult = realloc(result, size * sizeof(char *)); 1084 if (nresult == NULL) { 1085 free(result); 1086 return NULL; 1087 } 1088 result = nresult; 1089 } 1090 len = i - start; 1091 temp = malloc(len + 1); 1092 if (temp == NULL) { 1093 for (i = 0; i < idx; i++) 1094 free(result[i]); 1095 free(result); 1096 return NULL; 1097 } 1098 (void)strncpy(temp, &str[start], len); 1099 temp[len] = '\0'; 1100 result[idx++] = temp; 1101 result[idx] = NULL; 1102 if (str[i]) 1103 i++; 1104 } 1105 return (result); 1106} 1107 1108 1109/* 1110 * limit size of history record to ``max'' events 1111 */ 1112void 1113stifle_history(int max) 1114{ 1115 TYPE(HistEvent) ev; 1116 1117 if (h == NULL || e == NULL) 1118 rl_initialize(); 1119 1120 if (FUNW(history)(h, &ev, H_SETSIZE, max) == 0) 1121 max_input_history = max; 1122} 1123 1124 1125/* 1126 * "unlimit" size of history - set the limit to maximum allowed int value 1127 */ 1128int 1129unstifle_history(void) 1130{ 1131 TYPE(HistEvent) ev; 1132 int omax; 1133 1134 FUNW(history)(h, &ev, H_SETSIZE, INT_MAX); 1135 omax = max_input_history; 1136 max_input_history = INT_MAX; 1137 return (omax); /* some value _must_ be returned */ 1138} 1139 1140 1141int 1142history_is_stifled(void) 1143{ 1144 1145 /* cannot return true answer */ 1146 return (max_input_history != INT_MAX); 1147} 1148 1149static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1150 1151int 1152history_truncate_file (const char *filename, int nlines) 1153{ 1154 int ret = 0; 1155 FILE *fp, *tp; 1156 char template[sizeof(_history_tmp_template)]; 1157 char buf[4096]; 1158 int fd; 1159 char *cp; 1160 off_t off; 1161 int count = 0; 1162 ssize_t left = 0; 1163 1164 if (filename == NULL && (filename = _default_history_file()) == NULL) 1165 return errno; 1166 if ((fp = fopen(filename, "r+")) == NULL) 1167 return errno; 1168 strcpy(template, _history_tmp_template); 1169 if ((fd = mkstemp(template)) == -1) { 1170 ret = errno; 1171 goto out1; 1172 } 1173 1174 if ((tp = fdopen(fd, "r+")) == NULL) { 1175 close(fd); 1176 ret = errno; 1177 goto out2; 1178 } 1179 1180 for(;;) { 1181 if (fread(buf, sizeof(buf), 1, fp) != 1) { 1182 if (ferror(fp)) { 1183 ret = errno; 1184 break; 1185 } 1186 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1187 (off_t)-1) { 1188 ret = errno; 1189 break; 1190 } 1191 left = fread(buf, 1, sizeof(buf), fp); 1192 if (ferror(fp)) { 1193 ret = errno; 1194 break; 1195 } 1196 if (left == 0) { 1197 count--; 1198 left = sizeof(buf); 1199 } else if (fwrite(buf, (size_t)left, 1, tp) != 1) { 1200 ret = errno; 1201 break; 1202 } 1203 fflush(tp); 1204 break; 1205 } 1206 if (fwrite(buf, sizeof(buf), 1, tp) != 1) { 1207 ret = errno; 1208 break; 1209 } 1210 count++; 1211 } 1212 if (ret) 1213 goto out3; 1214 cp = buf + left - 1; 1215 if(*cp != '\n') 1216 cp++; 1217 for(;;) { 1218 while (--cp >= buf) { 1219 if (*cp == '\n') { 1220 if (--nlines == 0) { 1221 if (++cp >= buf + sizeof(buf)) { 1222 count++; 1223 cp = buf; 1224 } 1225 break; 1226 } 1227 } 1228 } 1229 if (nlines <= 0 || count == 0) 1230 break; 1231 count--; 1232 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1233 ret = errno; 1234 break; 1235 } 1236 if (fread(buf, sizeof(buf), 1, tp) != 1) { 1237 if (ferror(tp)) { 1238 ret = errno; 1239 break; 1240 } 1241 ret = EAGAIN; 1242 break; 1243 } 1244 cp = buf + sizeof(buf); 1245 } 1246 1247 if (ret || nlines > 0) 1248 goto out3; 1249 1250 if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) { 1251 ret = errno; 1252 goto out3; 1253 } 1254 1255 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1256 (off_t)-1) { 1257 ret = errno; 1258 goto out3; 1259 } 1260 1261 for(;;) { 1262 if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) { 1263 if (ferror(fp)) 1264 ret = errno; 1265 break; 1266 } 1267 if (fwrite(buf, (size_t)left, 1, fp) != 1) { 1268 ret = errno; 1269 break; 1270 } 1271 } 1272 fflush(fp); 1273 if((off = ftello(fp)) > 0) 1274 (void)ftruncate(fileno(fp), off); 1275out3: 1276 fclose(tp); 1277out2: 1278 unlink(template); 1279out1: 1280 fclose(fp); 1281 1282 return ret; 1283} 1284 1285 1286/* 1287 * read history from a file given 1288 */ 1289int 1290read_history(const char *filename) 1291{ 1292 TYPE(HistEvent) ev; 1293 1294 if (h == NULL || e == NULL) 1295 rl_initialize(); 1296 if (filename == NULL && (filename = _default_history_file()) == NULL) 1297 return errno; 1298 return (FUNW(history)(h, &ev, H_LOAD, filename) == -1 ? 1299 (errno ? errno : EINVAL) : 0); 1300} 1301 1302 1303/* 1304 * write history to a file given 1305 */ 1306int 1307write_history(const char *filename) 1308{ 1309 TYPE(HistEvent) ev; 1310 1311 if (h == NULL || e == NULL) 1312 rl_initialize(); 1313 if (filename == NULL && (filename = _default_history_file()) == NULL) 1314 return errno; 1315 return (FUNW(history)(h, &ev, H_SAVE, filename) == -1 ? 1316 (errno ? errno : EINVAL) : 0); 1317} 1318 1319 1320/* 1321 * returns history ``num''th event 1322 * 1323 * returned pointer points to static variable 1324 */ 1325HIST_ENTRY * 1326history_get(int num) 1327{ 1328 static HIST_ENTRY she; 1329 TYPE(HistEvent) ev; 1330 int curr_num; 1331 1332 if (h == NULL || e == NULL) 1333 rl_initialize(); 1334 1335 /* save current position */ 1336 if (FUNW(history)(h, &ev, H_CURR) != 0) 1337 return (NULL); 1338 curr_num = ev.num; 1339 1340 /* start from the oldest */ 1341 if (FUNW(history)(h, &ev, H_LAST) != 0) 1342 return (NULL); /* error */ 1343 1344 /* look forwards for event matching specified offset */ 1345 if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1346 return (NULL); 1347 1348 she.line = ct_encode_string(ev.str, &conv); 1349 1350 /* restore pointer to where it was */ 1351 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1352 1353 return (&she); 1354} 1355 1356 1357/* 1358 * add the line to history table 1359 */ 1360int 1361add_history(const char *line) 1362{ 1363 TYPE(HistEvent) ev; 1364 const Char *wline; 1365 1366 if (line == NULL) 1367 return 0; 1368 1369 if (h == NULL || e == NULL) 1370 rl_initialize(); 1371 1372 wline = ct_decode_string(line, &conv); 1373 1374 (void)FUNW(history)(h, &ev, H_ENTER, wline); 1375 if (FUNW(history)(h, &ev, H_GETSIZE) == 0) 1376 history_length = ev.num; 1377 1378 return (!(history_length > 0)); /* return 0 if all is okay */ 1379} 1380 1381 1382/* 1383 * remove the specified entry from the history list and return it. 1384 */ 1385HIST_ENTRY * 1386remove_history(int num) 1387{ 1388 HIST_ENTRY *he; 1389 TYPE(HistEvent) ev; 1390 1391 if (h == NULL || e == NULL) 1392 rl_initialize(); 1393 1394 if ((he = malloc(sizeof(*he))) == NULL) 1395 return NULL; 1396 1397 if (FUNW(history)(h, &ev, H_DELDATA, num, &he->data) != 0) { 1398 free(he); 1399 return NULL; 1400 } 1401 1402 he->line = ct_encode_string(ev.str, &conv); 1403 if (FUNW(history)(h, &ev, H_GETSIZE) == 0) 1404 history_length = ev.num; 1405 1406 return he; 1407} 1408 1409 1410/* 1411 * replace the line and data of the num-th entry 1412 */ 1413HIST_ENTRY * 1414replace_history_entry(int num, const char *line, histdata_t data) 1415{ 1416 HIST_ENTRY *he; 1417 TYPE(HistEvent) ev; 1418 int curr_num; 1419 1420 if (h == NULL || e == NULL) 1421 rl_initialize(); 1422 1423 /* save current position */ 1424 if (FUNW(history)(h, &ev, H_CURR) != 0) 1425 return NULL; 1426 curr_num = ev.num; 1427 1428 /* start from the oldest */ 1429 if (FUNW(history)(h, &ev, H_LAST) != 0) 1430 return NULL; /* error */ 1431 1432 if ((he = malloc(sizeof(*he))) == NULL) 1433 return NULL; 1434 1435 /* look forwards for event matching specified offset */ 1436 if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1437 goto out; 1438 1439 he->line = strdup(ct_encode_string(ev.str, &e->el_scratch)); 1440 if (he->line == NULL) 1441 goto out; 1442 1443 if (FUNW(history)(h, &ev, H_REPLACE, line, data)) 1444 goto out; 1445 1446 /* restore pointer to where it was */ 1447 if (FUNW(history)(h, &ev, H_SET, curr_num)) 1448 goto out; 1449 1450 return he; 1451out: 1452 free(he); 1453 return NULL; 1454} 1455 1456/* 1457 * clear the history list - delete all entries 1458 */ 1459void 1460clear_history(void) 1461{ 1462 TYPE(HistEvent) ev; 1463 1464 (void)FUNW(history)(h, &ev, H_CLEAR); 1465 history_length = 0; 1466} 1467 1468 1469/* 1470 * returns offset of the current history event 1471 */ 1472int 1473where_history(void) 1474{ 1475 TYPE(HistEvent) ev; 1476 int curr_num, off; 1477 1478 if (FUNW(history)(h, &ev, H_CURR) != 0) 1479 return (0); 1480 curr_num = ev.num; 1481 1482 (void)FUNW(history)(h, &ev, H_FIRST); 1483 off = 1; 1484 while (ev.num != curr_num && FUNW(history)(h, &ev, H_NEXT) == 0) 1485 off++; 1486 1487 return (off); 1488} 1489 1490 1491/* 1492 * returns current history event or NULL if there is no such event 1493 */ 1494HIST_ENTRY * 1495current_history(void) 1496{ 1497 1498 return (_move_history(H_CURR)); 1499} 1500 1501 1502/* 1503 * returns total number of bytes history events' data are using 1504 */ 1505int 1506history_total_bytes(void) 1507{ 1508 TYPE(HistEvent) ev; 1509 int curr_num; 1510 size_t size; 1511 1512 if (FUNW(history)(h, &ev, H_CURR) != 0) 1513 return (-1); 1514 curr_num = ev.num; 1515 1516 (void)FUNW(history)(h, &ev, H_FIRST); 1517 size = 0; 1518 do 1519 size += Strlen(ev.str) * sizeof(*ev.str); 1520 while (FUNW(history)(h, &ev, H_NEXT) == 0); 1521 1522 /* get to the same position as before */ 1523 FUNW(history)(h, &ev, H_PREV_EVENT, curr_num); 1524 1525 return (int)(size); 1526} 1527 1528 1529/* 1530 * sets the position in the history list to ``pos'' 1531 */ 1532int 1533history_set_pos(int pos) 1534{ 1535 TYPE(HistEvent) ev; 1536 int curr_num; 1537 1538 if (pos >= history_length || pos < 0) 1539 return (-1); 1540 1541 (void)FUNW(history)(h, &ev, H_CURR); 1542 curr_num = ev.num; 1543 1544 /* 1545 * use H_DELDATA to set to nth history (without delete) by passing 1546 * (void **)-1 1547 */ 1548 if (FUNW(history)(h, &ev, H_DELDATA, pos, (void **)-1)) { 1549 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1550 return(-1); 1551 } 1552 return (0); 1553} 1554 1555 1556/* 1557 * returns previous event in history and shifts pointer accordingly 1558 */ 1559HIST_ENTRY * 1560previous_history(void) 1561{ 1562 1563 return (_move_history(H_PREV)); 1564} 1565 1566 1567/* 1568 * returns next event in history and shifts pointer accordingly 1569 */ 1570HIST_ENTRY * 1571next_history(void) 1572{ 1573 1574 return (_move_history(H_NEXT)); 1575} 1576 1577 1578/* 1579 * searches for first history event containing the str 1580 */ 1581int 1582history_search(const char *str, int direction) 1583{ 1584 TYPE(HistEvent) ev; 1585 const Char *strp; 1586 const Char *wstr; 1587 int curr_num; 1588 1589 if (FUNW(history)(h, &ev, H_CURR) != 0) 1590 return (-1); 1591 curr_num = ev.num; 1592 1593 wstr = ct_decode_string(str, &conv); 1594 for (;;) { 1595 if ((strp = Strstr(ev.str, wstr)) != NULL) 1596 return (int) (strp - ev.str); 1597 if (FUNW(history)(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1598 break; 1599 } 1600 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1601 return (-1); 1602} 1603 1604 1605/* 1606 * searches for first history event beginning with str 1607 */ 1608int 1609history_search_prefix(const char *str, int direction) 1610{ 1611 TYPE(HistEvent) ev; 1612 1613 return (FUNW(history)(h, &ev, direction < 0 ? 1614 H_PREV_STR : H_NEXT_STR, str)); 1615} 1616 1617 1618/* 1619 * search for event in history containing str, starting at offset 1620 * abs(pos); continue backward, if pos<0, forward otherwise 1621 */ 1622/* ARGSUSED */ 1623int 1624history_search_pos(const char *str, 1625 int direction __attribute__((__unused__)), int pos) 1626{ 1627 TYPE(HistEvent) ev; 1628 int curr_num, off; 1629 const Char *wstr; 1630 1631 off = (pos > 0) ? pos : -pos; 1632 pos = (pos > 0) ? 1 : -1; 1633 1634 if (FUNW(history)(h, &ev, H_CURR) != 0) 1635 return (-1); 1636 curr_num = ev.num; 1637 1638 if (history_set_pos(off) != 0 || FUNW(history)(h, &ev, H_CURR) != 0) 1639 return (-1); 1640 1641 wstr = ct_decode_string(str, &conv); 1642 for (;;) { 1643 if (Strstr(ev.str, wstr)) 1644 return (off); 1645 if (FUNW(history)(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1646 break; 1647 } 1648 1649 /* set "current" pointer back to previous state */ 1650 (void)FUNW(history)(h, &ev, 1651 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1652 1653 return (-1); 1654} 1655 1656 1657/********************************/ 1658/* completion functions */ 1659 1660char * 1661tilde_expand(char *name) 1662{ 1663 return fn_tilde_expand(name); 1664} 1665 1666char * 1667filename_completion_function(const char *name, int state) 1668{ 1669 return fn_filename_completion_function(name, state); 1670} 1671 1672/* 1673 * a completion generator for usernames; returns _first_ username 1674 * which starts with supplied text 1675 * text contains a partial username preceded by random character 1676 * (usually '~'); state is ignored 1677 * it's callers responsibility to free returned value 1678 */ 1679char * 1680username_completion_function(const char *text, int state) 1681{ 1682 struct passwd *pwd, pwres; 1683 char pwbuf[1024]; 1684 1685 if (text[0] == '\0') 1686 return (NULL); 1687 1688 if (*text == '~') 1689 text++; 1690 1691 if (state == 0) 1692 setpwent(); 1693 1694 while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0 1695 && pwd != NULL && text[0] == pwd->pw_name[0] 1696 && strcmp(text, pwd->pw_name) == 0); 1697 1698 if (pwd == NULL) { 1699 endpwent(); 1700 return NULL; 1701 } 1702 return strdup(pwd->pw_name); 1703} 1704 1705 1706/* 1707 * el-compatible wrapper to send TSTP on ^Z 1708 */ 1709/* ARGSUSED */ 1710static unsigned char 1711_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1712{ 1713 (void)kill(0, SIGTSTP); 1714 return CC_NORM; 1715} 1716 1717/* 1718 * Display list of strings in columnar format on readline's output stream. 1719 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1720 * 'max' is maximum length of string in 'matches'. 1721 */ 1722void 1723rl_display_match_list(char **matches, int len, int max) 1724{ 1725 1726 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1727} 1728 1729static const char * 1730/*ARGSUSED*/ 1731_rl_completion_append_character_function(const char *dummy 1732 __attribute__((__unused__))) 1733{ 1734 static char buf[2]; 1735 buf[0] = rl_completion_append_character; 1736 buf[1] = '\0'; 1737 return buf; 1738} 1739 1740 1741/* 1742 * complete word at current point 1743 */ 1744/* ARGSUSED */ 1745int 1746rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1747{ 1748#ifdef WIDECHAR 1749 static ct_buffer_t wbreak_conv, sprefix_conv; 1750#endif 1751 1752 if (h == NULL || e == NULL) 1753 rl_initialize(); 1754 1755 if (rl_inhibit_completion) { 1756 char arr[2]; 1757 arr[0] = (char)invoking_key; 1758 arr[1] = '\0'; 1759 el_insertstr(e, arr); 1760 return (CC_REFRESH); 1761 } 1762 1763 /* Just look at how many global variables modify this operation! */ 1764 return fn_complete(e, 1765 (CPFunction *)rl_completion_entry_function, 1766 rl_attempted_completion_function, 1767 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1768 ct_decode_string(rl_special_prefixes, &sprefix_conv), 1769 _rl_completion_append_character_function, 1770 (size_t)rl_completion_query_items, 1771 &rl_completion_type, &rl_attempted_completion_over, 1772 &rl_point, &rl_end, NULL, NULL, NULL); 1773} 1774 1775 1776/* ARGSUSED */ 1777static unsigned char 1778_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1779{ 1780 return (unsigned char)rl_complete(0, ch); 1781} 1782 1783/* 1784 * misc other functions 1785 */ 1786 1787/* 1788 * bind key c to readline-type function func 1789 */ 1790int 1791rl_bind_key(int c, rl_command_func_t *func) 1792{ 1793 int retval = -1; 1794 1795 if (h == NULL || e == NULL) 1796 rl_initialize(); 1797 1798 if (func == rl_insert) { 1799 /* XXX notice there is no range checking of ``c'' */ 1800 e->el_map.key[c] = ED_INSERT; 1801 retval = 0; 1802 } 1803 return (retval); 1804} 1805 1806 1807/* 1808 * read one key from input - handles chars pushed back 1809 * to input stream also 1810 */ 1811int 1812rl_read_key(void) 1813{ 1814 char fooarr[2 * sizeof(int)]; 1815 1816 if (e == NULL || h == NULL) 1817 rl_initialize(); 1818 1819 return (el_getc(e, fooarr)); 1820} 1821 1822 1823/* 1824 * reset the terminal 1825 */ 1826/* ARGSUSED */ 1827void 1828rl_reset_terminal(const char *p __attribute__((__unused__))) 1829{ 1830 1831 if (h == NULL || e == NULL) 1832 rl_initialize(); 1833 el_reset(e); 1834} 1835 1836 1837/* 1838 * insert character ``c'' back into input stream, ``count'' times 1839 */ 1840int 1841rl_insert(int count, int c) 1842{ 1843 char arr[2]; 1844 1845 if (h == NULL || e == NULL) 1846 rl_initialize(); 1847 1848 /* XXX - int -> char conversion can lose on multichars */ 1849 arr[0] = c; 1850 arr[1] = '\0'; 1851 1852 for (; count > 0; count--) 1853 el_push(e, arr); 1854 1855 return (0); 1856} 1857 1858int 1859rl_insert_text(const char *text) 1860{ 1861 if (!text || *text == 0) 1862 return (0); 1863 1864 if (h == NULL || e == NULL) 1865 rl_initialize(); 1866 1867 if (el_insertstr(e, text) < 0) 1868 return (0); 1869 return (int)strlen(text); 1870} 1871 1872/*ARGSUSED*/ 1873int 1874rl_newline(int count, int c) 1875{ 1876 /* 1877 * Readline-4.0 appears to ignore the args. 1878 */ 1879 return rl_insert(1, '\n'); 1880} 1881 1882/*ARGSUSED*/ 1883static unsigned char 1884rl_bind_wrapper(EditLine *el, unsigned char c) 1885{ 1886 if (map[c] == NULL) 1887 return CC_ERROR; 1888 1889 _rl_update_pos(); 1890 1891 (*map[c])(NULL, c); 1892 1893 /* If rl_done was set by the above call, deal with it here */ 1894 if (rl_done) 1895 return CC_EOF; 1896 1897 return CC_NORM; 1898} 1899 1900int 1901rl_add_defun(const char *name, Function *fun, int c) 1902{ 1903 char dest[8]; 1904 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1905 return -1; 1906 map[(unsigned char)c] = fun; 1907 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1908 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1909 el_set(e, EL_BIND, dest, name); 1910 return 0; 1911} 1912 1913void 1914rl_callback_read_char() 1915{ 1916 int count = 0, done = 0; 1917 const char *buf = el_gets(e, &count); 1918 char *wbuf; 1919 1920 if (buf == NULL || count-- <= 0) 1921 return; 1922 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1923 done = 1; 1924 if (buf[count] == '\n' || buf[count] == '\r') 1925 done = 2; 1926 1927 if (done && rl_linefunc != NULL) { 1928 el_set(e, EL_UNBUFFERED, 0); 1929 if (done == 2) { 1930 if ((wbuf = strdup(buf)) != NULL) 1931 wbuf[count] = '\0'; 1932 } else 1933 wbuf = NULL; 1934 (*(void (*)(const char *))rl_linefunc)(wbuf); 1935 //el_set(e, EL_UNBUFFERED, 1); 1936 } 1937} 1938 1939void 1940rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1941{ 1942 if (e == NULL) { 1943 rl_initialize(); 1944 } 1945 (void)rl_set_prompt(prompt); 1946 rl_linefunc = linefunc; 1947 el_set(e, EL_UNBUFFERED, 1); 1948} 1949 1950void 1951rl_callback_handler_remove(void) 1952{ 1953 el_set(e, EL_UNBUFFERED, 0); 1954 rl_linefunc = NULL; 1955} 1956 1957void 1958rl_redisplay(void) 1959{ 1960 char a[2]; 1961 a[0] = e->el_tty.t_c[TS_IO][C_REPRINT]; 1962 a[1] = '\0'; 1963 el_push(e, a); 1964} 1965 1966int 1967rl_get_previous_history(int count, int key) 1968{ 1969 char a[2]; 1970 a[0] = key; 1971 a[1] = '\0'; 1972 while (count--) 1973 el_push(e, a); 1974 return 0; 1975} 1976 1977void 1978/*ARGSUSED*/ 1979rl_prep_terminal(int meta_flag) 1980{ 1981 el_set(e, EL_PREP_TERM, 1); 1982} 1983 1984void 1985rl_deprep_terminal(void) 1986{ 1987 el_set(e, EL_PREP_TERM, 0); 1988} 1989 1990int 1991rl_read_init_file(const char *s) 1992{ 1993 return(el_source(e, s)); 1994} 1995 1996int 1997rl_parse_and_bind(const char *line) 1998{ 1999 const char **argv; 2000 int argc; 2001 Tokenizer *tok; 2002 2003 tok = tok_init(NULL); 2004 tok_str(tok, line, &argc, &argv); 2005 argc = el_parse(e, argc, argv); 2006 tok_end(tok); 2007 return (argc ? 1 : 0); 2008} 2009 2010int 2011rl_variable_bind(const char *var, const char *value) 2012{ 2013 /* 2014 * The proper return value is undocument, but this is what the 2015 * readline source seems to do. 2016 */ 2017 return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0); 2018} 2019 2020void 2021rl_stuff_char(int c) 2022{ 2023 char buf[2]; 2024 2025 buf[0] = c; 2026 buf[1] = '\0'; 2027 el_insertstr(e, buf); 2028} 2029 2030static int 2031_rl_event_read_char(EditLine *el, char *cp) 2032{ 2033 int n; 2034 ssize_t num_read = 0; 2035 2036 *cp = '\0'; 2037 while (rl_event_hook) { 2038 2039 (*rl_event_hook)(); 2040 2041#if defined(FIONREAD) 2042 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2043 return(-1); 2044 if (n) 2045 num_read = read(el->el_infd, cp, 1); 2046 else 2047 num_read = 0; 2048#elif defined(F_SETFL) && defined(O_NDELAY) 2049 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2050 return(-1); 2051 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2052 return(-1); 2053 num_read = read(el->el_infd, cp, 1); 2054 if (fcntl(el->el_infd, F_SETFL, n)) 2055 return(-1); 2056#else 2057 /* not non-blocking, but what you gonna do? */ 2058 num_read = read(el->el_infd, cp, 1); 2059 return(-1); 2060#endif 2061 2062 if (num_read < 0 && errno == EAGAIN) 2063 continue; 2064 if (num_read == 0) 2065 continue; 2066 break; 2067 } 2068 if (!rl_event_hook) 2069 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2070 return (int)num_read; 2071} 2072 2073static void 2074_rl_update_pos(void) 2075{ 2076 const LineInfo *li = el_line(e); 2077 2078 rl_point = (int)(li->cursor - li->buffer); 2079 rl_end = (int)(li->lastchar - li->buffer); 2080} 2081 2082void 2083rl_get_screen_size(int *rows, int *cols) 2084{ 2085 if (rows) 2086 el_get(e, EL_GETTC, "li", rows); 2087 if (cols) 2088 el_get(e, EL_GETTC, "co", cols); 2089} 2090 2091void 2092rl_set_screen_size(int rows, int cols) 2093{ 2094 char buf[64]; 2095 (void)snprintf(buf, sizeof(buf), "%d", rows); 2096 el_set(e, EL_SETTC, "li", buf); 2097 (void)snprintf(buf, sizeof(buf), "%d", cols); 2098 el_set(e, EL_SETTC, "co", buf); 2099} 2100 2101char ** 2102rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2103{ 2104 size_t len, max, i, j, min; 2105 char **list, *match, *a, *b; 2106 2107 len = 1; 2108 max = 10; 2109 if ((list = malloc(max * sizeof(*list))) == NULL) 2110 return NULL; 2111 2112 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2113 list[len++] = match; 2114 if (len == max) { 2115 char **nl; 2116 max += 10; 2117 if ((nl = realloc(list, max * sizeof(*nl))) == NULL) 2118 goto out; 2119 list = nl; 2120 } 2121 } 2122 if (len == 1) 2123 goto out; 2124 list[len] = NULL; 2125 if (len == 2) { 2126 if ((list[0] = strdup(list[1])) == NULL) 2127 goto out; 2128 return list; 2129 } 2130 qsort(&list[1], len - 1, sizeof(*list), 2131 (int (*)(const void *, const void *)) strcmp); 2132 min = SIZE_T_MAX; 2133 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2134 b = list[i + 1]; 2135 for (j = 0; a[j] && a[j] == b[j]; j++) 2136 continue; 2137 if (min > j) 2138 min = j; 2139 } 2140 if (min == 0 && *str) { 2141 if ((list[0] = strdup(str)) == NULL) 2142 goto out; 2143 } else { 2144 if ((list[0] = malloc(min + 1)) == NULL) 2145 goto out; 2146 (void)memcpy(list[0], list[1], min); 2147 list[0][min] = '\0'; 2148 } 2149 return list; 2150 2151out: 2152 free(list); 2153 return NULL; 2154} 2155 2156char * 2157rl_filename_completion_function (const char *text, int state) 2158{ 2159 return fn_filename_completion_function(text, state); 2160} 2161 2162void 2163rl_forced_update_display(void) 2164{ 2165 el_set(e, EL_REFRESH); 2166} 2167 2168int 2169_rl_abort_internal(void) 2170{ 2171 el_beep(e); 2172 longjmp(topbuf, 1); 2173 /*NOTREACHED*/ 2174} 2175 2176int 2177_rl_qsort_string_compare(char **s1, char **s2) 2178{ 2179 return strcoll(*s1, *s2); 2180} 2181 2182HISTORY_STATE * 2183history_get_history_state(void) 2184{ 2185 HISTORY_STATE *hs; 2186 2187 if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL) 2188 return (NULL); 2189 hs->length = history_length; 2190 return (hs); 2191} 2192 2193int 2194/*ARGSUSED*/ 2195rl_kill_text(int from, int to) 2196{ 2197 return 0; 2198} 2199 2200Keymap 2201rl_make_bare_keymap(void) 2202{ 2203 return NULL; 2204} 2205 2206Keymap 2207rl_get_keymap(void) 2208{ 2209 return NULL; 2210} 2211 2212void 2213/*ARGSUSED*/ 2214rl_set_keymap(Keymap k) 2215{ 2216} 2217 2218int 2219/*ARGSUSED*/ 2220rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k) 2221{ 2222 return 0; 2223} 2224 2225int 2226/*ARGSUSED*/ 2227rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k) 2228{ 2229 return 0; 2230} 2231 2232/* unsupported, but needed by python */ 2233void 2234rl_cleanup_after_signal(void) 2235{ 2236} 2237 2238int 2239rl_on_new_line(void) 2240{ 2241 return 0; 2242} 2243