1 /* $NetBSD: readline.c,v 1.106 2012/10/12 23:35:02 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 "config.h" 33 #if !defined(lint) && !defined(SCCSID) 34 __RCSID("$NetBSD: readline.c,v 1.106 2012/10/12 23:35:02 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #include <vis.h> 51 52 #include "editline/readline.h" 53 #include "el.h" 54 #include "fcns.h" /* for EL_NUM_FCNS */ 55 #include "histedit.h" 56 #include "filecomplete.h" 57 58 #if !defined(SIZE_T_MAX) 59 # define SIZE_T_MAX (size_t)(-1) 60 #endif 61 62 void rl_prep_terminal(int); 63 void rl_deprep_terminal(void); 64 65 /* for rl_complete() */ 66 #define TAB '\r' 67 68 /* see comment at the #ifdef for sense of this */ 69 /* #define GDB_411_HACK */ 70 71 /* readline compatibility stuff - look at readline sources/documentation */ 72 /* to see what these variables mean */ 73 const char *rl_library_version = "EditLine wrapper"; 74 int rl_readline_version = RL_READLINE_VERSION; 75 static char empty[] = { '\0' }; 76 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 77 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 78 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 79 char *rl_readline_name = empty; 80 FILE *rl_instream = NULL; 81 FILE *rl_outstream = NULL; 82 int rl_point = 0; 83 int rl_end = 0; 84 char *rl_line_buffer = NULL; 85 VCPFunction *rl_linefunc = NULL; 86 int rl_done = 0; 87 VFunction *rl_event_hook = NULL; 88 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 89 emacs_meta_keymap, 90 emacs_ctlx_keymap; 91 92 int history_base = 1; /* probably never subject to change */ 93 int history_length = 0; 94 int max_input_history = 0; 95 char history_expansion_char = '!'; 96 char history_subst_char = '^'; 97 char *history_no_expand_chars = expand_chars; 98 Function *history_inhibit_expansion_function = NULL; 99 char *history_arg_extract(int start, int end, const char *str); 100 101 int rl_inhibit_completion = 0; 102 int rl_attempted_completion_over = 0; 103 char *rl_basic_word_break_characters = break_chars; 104 char *rl_completer_word_break_characters = NULL; 105 char *rl_completer_quote_characters = NULL; 106 Function *rl_completion_entry_function = NULL; 107 char *(*rl_completion_word_break_hook)(void) = NULL; 108 CPPFunction *rl_attempted_completion_function = NULL; 109 Function *rl_pre_input_hook = NULL; 110 Function *rl_startup1_hook = NULL; 111 int (*rl_getc_function)(FILE *) = NULL; 112 char *rl_terminal_name = NULL; 113 int rl_already_prompted = 0; 114 int rl_filename_completion_desired = 0; 115 int rl_ignore_completion_duplicates = 0; 116 int rl_catch_signals = 1; 117 int readline_echoing_p = 1; 118 int _rl_print_completions_horizontally = 0; 119 VFunction *rl_redisplay_function = NULL; 120 Function *rl_startup_hook = NULL; 121 VFunction *rl_completion_display_matches_hook = NULL; 122 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 123 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 124 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 125 126 /* 127 * The current prompt string. 128 */ 129 char *rl_prompt = NULL; 130 /* 131 * This is set to character indicating type of completion being done by 132 * rl_complete_internal(); this is available for application completion 133 * functions. 134 */ 135 int rl_completion_type = 0; 136 137 /* 138 * If more than this number of items results from query for possible 139 * completions, we ask user if they are sure to really display the list. 140 */ 141 int rl_completion_query_items = 100; 142 143 /* 144 * List of characters which are word break characters, but should be left 145 * in the parsed text when it is passed to the completion function. 146 * Shell uses this to help determine what kind of completing to do. 147 */ 148 char *rl_special_prefixes = NULL; 149 150 /* 151 * This is the character appended to the completed words if at the end of 152 * the line. Default is ' ' (a space). 153 */ 154 int rl_completion_append_character = ' '; 155 156 /* stuff below is used internally by libedit for readline emulation */ 157 158 static History *h = NULL; 159 static EditLine *e = NULL; 160 static Function *map[256]; 161 static jmp_buf topbuf; 162 163 /* internal functions */ 164 static unsigned char _el_rl_complete(EditLine *, int); 165 static unsigned char _el_rl_tstp(EditLine *, int); 166 static char *_get_prompt(EditLine *); 167 static int _getc_function(EditLine *, char *); 168 static HIST_ENTRY *_move_history(int); 169 static int _history_expand_command(const char *, size_t, size_t, 170 char **); 171 static char *_rl_compat_sub(const char *, const char *, 172 const char *, int); 173 static int _rl_event_read_char(EditLine *, char *); 174 static void _rl_update_pos(void); 175 176 177 /* ARGSUSED */ 178 static char * 179 _get_prompt(EditLine *el __attribute__((__unused__))) 180 { 181 rl_already_prompted = 1; 182 return rl_prompt; 183 } 184 185 186 /* 187 * generic function for moving around history 188 */ 189 static HIST_ENTRY * 190 _move_history(int op) 191 { 192 HistEvent ev; 193 static HIST_ENTRY rl_he; 194 195 if (history(h, &ev, op) != 0) 196 return NULL; 197 198 rl_he.line = ev.str; 199 rl_he.data = NULL; 200 201 return &rl_he; 202 } 203 204 205 /* 206 * read one key from user defined input function 207 */ 208 static int 209 /*ARGSUSED*/ 210 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 211 { 212 int i; 213 214 i = (*rl_getc_function)(NULL); 215 if (i == -1) 216 return 0; 217 *c = (char)i; 218 return 1; 219 } 220 221 static void 222 _resize_fun(EditLine *el, void *a) 223 { 224 const LineInfo *li; 225 char **ap = a; 226 227 li = el_line(el); 228 /* a cheesy way to get rid of const cast. */ 229 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 230 } 231 232 static const char * 233 _default_history_file(void) 234 { 235 struct passwd *p; 236 static char path[PATH_MAX]; 237 238 if (*path) 239 return path; 240 if ((p = getpwuid(getuid())) == NULL) 241 return NULL; 242 (void)snprintf(path, sizeof(path), "%s/.history", p->pw_dir); 243 return path; 244 } 245 246 /* 247 * READLINE compatibility stuff 248 */ 249 250 /* 251 * Set the prompt 252 */ 253 int 254 rl_set_prompt(const char *prompt) 255 { 256 char *p; 257 258 if (!prompt) 259 prompt = ""; 260 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 261 return 0; 262 if (rl_prompt) 263 el_free(rl_prompt); 264 rl_prompt = strdup(prompt); 265 if (rl_prompt == NULL) 266 return -1; 267 268 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 269 *p = RL_PROMPT_START_IGNORE; 270 271 return 0; 272 } 273 274 /* 275 * initialize rl compat stuff 276 */ 277 int 278 rl_initialize(void) 279 { 280 HistEvent ev; 281 int editmode = 1; 282 struct termios t; 283 284 if (e != NULL) 285 el_end(e); 286 if (h != NULL) 287 history_end(h); 288 289 if (!rl_instream) 290 rl_instream = stdin; 291 if (!rl_outstream) 292 rl_outstream = stdout; 293 294 /* 295 * See if we don't really want to run the editor 296 */ 297 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 298 editmode = 0; 299 300 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 301 302 if (!editmode) 303 el_set(e, EL_EDITMODE, 0); 304 305 h = history_init(); 306 if (!e || !h) 307 return -1; 308 309 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 310 history_length = 0; 311 max_input_history = INT_MAX; 312 el_set(e, EL_HIST, history, h); 313 314 /* Setup resize function */ 315 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 316 317 /* setup getc function if valid */ 318 if (rl_getc_function) 319 el_set(e, EL_GETCFN, _getc_function); 320 321 /* for proper prompt printing in readline() */ 322 if (rl_set_prompt("") == -1) { 323 history_end(h); 324 el_end(e); 325 return -1; 326 } 327 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 328 el_set(e, EL_SIGNAL, rl_catch_signals); 329 330 /* set default mode to "emacs"-style and read setting afterwards */ 331 /* so this can be overriden */ 332 el_set(e, EL_EDITOR, "emacs"); 333 if (rl_terminal_name != NULL) 334 el_set(e, EL_TERMINAL, rl_terminal_name); 335 else 336 el_get(e, EL_TERMINAL, &rl_terminal_name); 337 338 /* 339 * Word completion - this has to go AFTER rebinding keys 340 * to emacs-style. 341 */ 342 el_set(e, EL_ADDFN, "rl_complete", 343 "ReadLine compatible completion function", 344 _el_rl_complete); 345 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 346 347 /* 348 * Send TSTP when ^Z is pressed. 349 */ 350 el_set(e, EL_ADDFN, "rl_tstp", 351 "ReadLine compatible suspend function", 352 _el_rl_tstp); 353 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 354 355 /* read settings from configuration file */ 356 el_source(e, NULL); 357 358 /* 359 * Unfortunately, some applications really do use rl_point 360 * and rl_line_buffer directly. 361 */ 362 _resize_fun(e, &rl_line_buffer); 363 _rl_update_pos(); 364 365 if (rl_startup_hook) 366 (*rl_startup_hook)(NULL, 0); 367 368 return 0; 369 } 370 371 372 /* 373 * read one line from input stream and return it, chomping 374 * trailing newline (if there is any) 375 */ 376 char * 377 readline(const char *p) 378 { 379 HistEvent ev; 380 const char * volatile prompt = p; 381 int count; 382 const char *ret; 383 char *buf; 384 static int used_event_hook; 385 386 if (e == NULL || h == NULL) 387 rl_initialize(); 388 389 rl_done = 0; 390 391 (void)setjmp(topbuf); 392 393 /* update prompt accordingly to what has been passed */ 394 if (rl_set_prompt(prompt) == -1) 395 return NULL; 396 397 if (rl_pre_input_hook) 398 (*rl_pre_input_hook)(NULL, 0); 399 400 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 401 el_set(e, EL_GETCFN, _rl_event_read_char); 402 used_event_hook = 1; 403 } 404 405 if (!rl_event_hook && used_event_hook) { 406 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 407 used_event_hook = 0; 408 } 409 410 rl_already_prompted = 0; 411 412 /* get one line from input stream */ 413 ret = el_gets(e, &count); 414 415 if (ret && count > 0) { 416 int lastidx; 417 418 buf = strdup(ret); 419 if (buf == NULL) 420 return NULL; 421 lastidx = count - 1; 422 if (buf[lastidx] == '\n') 423 buf[lastidx] = '\0'; 424 } else 425 buf = NULL; 426 427 history(h, &ev, H_GETSIZE); 428 history_length = ev.num; 429 430 return buf; 431 } 432 433 /* 434 * history functions 435 */ 436 437 /* 438 * is normally called before application starts to use 439 * history expansion functions 440 */ 441 void 442 using_history(void) 443 { 444 if (h == NULL || e == NULL) 445 rl_initialize(); 446 } 447 448 449 /* 450 * substitute ``what'' with ``with'', returning resulting string; if 451 * globally == 1, substitutes all occurrences of what, otherwise only the 452 * first one 453 */ 454 static char * 455 _rl_compat_sub(const char *str, const char *what, const char *with, 456 int globally) 457 { 458 const char *s; 459 char *r, *result; 460 size_t len, with_len, what_len; 461 462 len = strlen(str); 463 with_len = strlen(with); 464 what_len = strlen(what); 465 466 /* calculate length we need for result */ 467 s = str; 468 while (*s) { 469 if (*s == *what && !strncmp(s, what, what_len)) { 470 len += with_len - what_len; 471 if (!globally) 472 break; 473 s += what_len; 474 } else 475 s++; 476 } 477 r = result = el_malloc((len + 1) * sizeof(*r)); 478 if (result == NULL) 479 return NULL; 480 s = str; 481 while (*s) { 482 if (*s == *what && !strncmp(s, what, what_len)) { 483 (void)strncpy(r, with, with_len); 484 r += with_len; 485 s += what_len; 486 if (!globally) { 487 (void)strcpy(r, s); 488 return result; 489 } 490 } else 491 *r++ = *s++; 492 } 493 *r = '\0'; 494 return result; 495 } 496 497 static char *last_search_pat; /* last !?pat[?] search pattern */ 498 static char *last_search_match; /* last !?pat[?] that matched */ 499 500 const char * 501 get_history_event(const char *cmd, int *cindex, int qchar) 502 { 503 int idx, sign, sub, num, begin, ret; 504 size_t len; 505 char *pat; 506 const char *rptr; 507 HistEvent ev; 508 509 idx = *cindex; 510 if (cmd[idx++] != history_expansion_char) 511 return NULL; 512 513 /* find out which event to take */ 514 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 515 if (history(h, &ev, H_FIRST) != 0) 516 return NULL; 517 *cindex = cmd[idx]? (idx + 1):idx; 518 return ev.str; 519 } 520 sign = 0; 521 if (cmd[idx] == '-') { 522 sign = 1; 523 idx++; 524 } 525 526 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 527 HIST_ENTRY *rl_he; 528 529 num = 0; 530 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 531 num = num * 10 + cmd[idx] - '0'; 532 idx++; 533 } 534 if (sign) 535 num = history_length - num + 1; 536 537 if (!(rl_he = history_get(num))) 538 return NULL; 539 540 *cindex = idx; 541 return rl_he->line; 542 } 543 sub = 0; 544 if (cmd[idx] == '?') { 545 sub = 1; 546 idx++; 547 } 548 begin = idx; 549 while (cmd[idx]) { 550 if (cmd[idx] == '\n') 551 break; 552 if (sub && cmd[idx] == '?') 553 break; 554 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 555 || cmd[idx] == '\t' || cmd[idx] == qchar)) 556 break; 557 idx++; 558 } 559 len = (size_t)idx - (size_t)begin; 560 if (sub && cmd[idx] == '?') 561 idx++; 562 if (sub && len == 0 && last_search_pat && *last_search_pat) 563 pat = last_search_pat; 564 else if (len == 0) 565 return NULL; 566 else { 567 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 568 return NULL; 569 (void)strncpy(pat, cmd + begin, len); 570 pat[len] = '\0'; 571 } 572 573 if (history(h, &ev, H_CURR) != 0) { 574 if (pat != last_search_pat) 575 el_free(pat); 576 return NULL; 577 } 578 num = ev.num; 579 580 if (sub) { 581 if (pat != last_search_pat) { 582 if (last_search_pat) 583 el_free(last_search_pat); 584 last_search_pat = pat; 585 } 586 ret = history_search(pat, -1); 587 } else 588 ret = history_search_prefix(pat, -1); 589 590 if (ret == -1) { 591 /* restore to end of list on failed search */ 592 history(h, &ev, H_FIRST); 593 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 594 if (pat != last_search_pat) 595 el_free(pat); 596 return NULL; 597 } 598 599 if (sub && len) { 600 if (last_search_match && last_search_match != pat) 601 el_free(last_search_match); 602 last_search_match = pat; 603 } 604 605 if (pat != last_search_pat) 606 el_free(pat); 607 608 if (history(h, &ev, H_CURR) != 0) 609 return NULL; 610 *cindex = idx; 611 rptr = ev.str; 612 613 /* roll back to original position */ 614 (void)history(h, &ev, H_SET, num); 615 616 return rptr; 617 } 618 619 /* 620 * the real function doing history expansion - takes as argument command 621 * to do and data upon which the command should be executed 622 * does expansion the way I've understood readline documentation 623 * 624 * returns 0 if data was not modified, 1 if it was and 2 if the string 625 * should be only printed and not executed; in case of error, 626 * returns -1 and *result points to NULL 627 * it's callers responsibility to free() string returned in *result 628 */ 629 static int 630 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 631 char **result) 632 { 633 char *tmp, *search = NULL, *aptr; 634 const char *ptr, *cmd; 635 static char *from = NULL, *to = NULL; 636 int start, end, idx, has_mods = 0; 637 int p_on = 0, g_on = 0; 638 639 *result = NULL; 640 aptr = NULL; 641 ptr = NULL; 642 643 /* First get event specifier */ 644 idx = 0; 645 646 if (strchr(":^*$", command[offs + 1])) { 647 char str[4]; 648 /* 649 * "!:" is shorthand for "!!:". 650 * "!^", "!*" and "!$" are shorthand for 651 * "!!:^", "!!:*" and "!!:$" respectively. 652 */ 653 str[0] = str[1] = '!'; 654 str[2] = '0'; 655 ptr = get_history_event(str, &idx, 0); 656 idx = (command[offs + 1] == ':')? 1:0; 657 has_mods = 1; 658 } else { 659 if (command[offs + 1] == '#') { 660 /* use command so far */ 661 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 662 == NULL) 663 return -1; 664 (void)strncpy(aptr, command, offs); 665 aptr[offs] = '\0'; 666 idx = 1; 667 } else { 668 int qchar; 669 670 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 671 ptr = get_history_event(command + offs, &idx, qchar); 672 } 673 has_mods = command[offs + (size_t)idx] == ':'; 674 } 675 676 if (ptr == NULL && aptr == NULL) 677 return -1; 678 679 if (!has_mods) { 680 *result = strdup(aptr ? aptr : ptr); 681 if (aptr) 682 el_free(aptr); 683 if (*result == NULL) 684 return -1; 685 return 1; 686 } 687 688 cmd = command + offs + idx + 1; 689 690 /* Now parse any word designators */ 691 692 if (*cmd == '%') /* last word matched by ?pat? */ 693 tmp = strdup(last_search_match? last_search_match:""); 694 else if (strchr("^*$-0123456789", *cmd)) { 695 start = end = -1; 696 if (*cmd == '^') 697 start = end = 1, cmd++; 698 else if (*cmd == '$') 699 start = -1, cmd++; 700 else if (*cmd == '*') 701 start = 1, cmd++; 702 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 703 start = 0; 704 while (*cmd && '0' <= *cmd && *cmd <= '9') 705 start = start * 10 + *cmd++ - '0'; 706 707 if (*cmd == '-') { 708 if (isdigit((unsigned char) cmd[1])) { 709 cmd++; 710 end = 0; 711 while (*cmd && '0' <= *cmd && *cmd <= '9') 712 end = end * 10 + *cmd++ - '0'; 713 } else if (cmd[1] == '$') { 714 cmd += 2; 715 end = -1; 716 } else { 717 cmd++; 718 end = -2; 719 } 720 } else if (*cmd == '*') 721 end = -1, cmd++; 722 else 723 end = start; 724 } 725 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 726 if (tmp == NULL) { 727 (void)fprintf(rl_outstream, "%s: Bad word specifier", 728 command + offs + idx); 729 if (aptr) 730 el_free(aptr); 731 return -1; 732 } 733 } else 734 tmp = strdup(aptr? aptr:ptr); 735 736 if (aptr) 737 el_free(aptr); 738 739 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 740 *result = tmp; 741 return 1; 742 } 743 744 for (; *cmd; cmd++) { 745 if (*cmd == ':') 746 continue; 747 else if (*cmd == 'h') { /* remove trailing path */ 748 if ((aptr = strrchr(tmp, '/')) != NULL) 749 *aptr = '\0'; 750 } else if (*cmd == 't') { /* remove leading path */ 751 if ((aptr = strrchr(tmp, '/')) != NULL) { 752 aptr = strdup(aptr + 1); 753 el_free(tmp); 754 tmp = aptr; 755 } 756 } else if (*cmd == 'r') { /* remove trailing suffix */ 757 if ((aptr = strrchr(tmp, '.')) != NULL) 758 *aptr = '\0'; 759 } else if (*cmd == 'e') { /* remove all but suffix */ 760 if ((aptr = strrchr(tmp, '.')) != NULL) { 761 aptr = strdup(aptr); 762 el_free(tmp); 763 tmp = aptr; 764 } 765 } else if (*cmd == 'p') /* print only */ 766 p_on = 1; 767 else if (*cmd == 'g') 768 g_on = 2; 769 else if (*cmd == 's' || *cmd == '&') { 770 char *what, *with, delim; 771 size_t len, from_len; 772 size_t size; 773 774 if (*cmd == '&' && (from == NULL || to == NULL)) 775 continue; 776 else if (*cmd == 's') { 777 delim = *(++cmd), cmd++; 778 size = 16; 779 what = el_realloc(from, size * sizeof(*what)); 780 if (what == NULL) { 781 el_free(from); 782 el_free(tmp); 783 return 0; 784 } 785 len = 0; 786 for (; *cmd && *cmd != delim; cmd++) { 787 if (*cmd == '\\' && cmd[1] == delim) 788 cmd++; 789 if (len >= size) { 790 char *nwhat; 791 nwhat = el_realloc(what, 792 (size <<= 1) * 793 sizeof(*nwhat)); 794 if (nwhat == NULL) { 795 el_free(what); 796 el_free(tmp); 797 return 0; 798 } 799 what = nwhat; 800 } 801 what[len++] = *cmd; 802 } 803 what[len] = '\0'; 804 from = what; 805 if (*what == '\0') { 806 el_free(what); 807 if (search) { 808 from = strdup(search); 809 if (from == NULL) { 810 el_free(tmp); 811 return 0; 812 } 813 } else { 814 from = NULL; 815 el_free(tmp); 816 return -1; 817 } 818 } 819 cmd++; /* shift after delim */ 820 if (!*cmd) 821 continue; 822 823 size = 16; 824 with = el_realloc(to, size * sizeof(*with)); 825 if (with == NULL) { 826 el_free(to); 827 el_free(tmp); 828 return -1; 829 } 830 len = 0; 831 from_len = strlen(from); 832 for (; *cmd && *cmd != delim; cmd++) { 833 if (len + from_len + 1 >= size) { 834 char *nwith; 835 size += from_len + 1; 836 nwith = el_realloc(with, 837 size * sizeof(*nwith)); 838 if (nwith == NULL) { 839 el_free(with); 840 el_free(tmp); 841 return -1; 842 } 843 with = nwith; 844 } 845 if (*cmd == '&') { 846 /* safe */ 847 (void)strcpy(&with[len], from); 848 len += from_len; 849 continue; 850 } 851 if (*cmd == '\\' 852 && (*(cmd + 1) == delim 853 || *(cmd + 1) == '&')) 854 cmd++; 855 with[len++] = *cmd; 856 } 857 with[len] = '\0'; 858 to = with; 859 } 860 861 aptr = _rl_compat_sub(tmp, from, to, g_on); 862 if (aptr) { 863 el_free(tmp); 864 tmp = aptr; 865 } 866 g_on = 0; 867 } 868 } 869 *result = tmp; 870 return p_on? 2:1; 871 } 872 873 874 /* 875 * csh-style history expansion 876 */ 877 int 878 history_expand(char *str, char **output) 879 { 880 int ret = 0; 881 size_t idx, i, size; 882 char *tmp, *result; 883 884 if (h == NULL || e == NULL) 885 rl_initialize(); 886 887 if (history_expansion_char == 0) { 888 *output = strdup(str); 889 return 0; 890 } 891 892 *output = NULL; 893 if (str[0] == history_subst_char) { 894 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 895 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 896 if (*output == NULL) 897 return 0; 898 (*output)[0] = (*output)[1] = history_expansion_char; 899 (*output)[2] = ':'; 900 (*output)[3] = 's'; 901 (void)strcpy((*output) + 4, str); 902 str = *output; 903 } else { 904 *output = strdup(str); 905 if (*output == NULL) 906 return 0; 907 } 908 909 #define ADD_STRING(what, len, fr) \ 910 { \ 911 if (idx + len + 1 > size) { \ 912 char *nresult = el_realloc(result, \ 913 (size += len + 1) * sizeof(*nresult)); \ 914 if (nresult == NULL) { \ 915 el_free(*output); \ 916 if (/*CONSTCOND*/fr) \ 917 el_free(tmp); \ 918 return 0; \ 919 } \ 920 result = nresult; \ 921 } \ 922 (void)strncpy(&result[idx], what, len); \ 923 idx += len; \ 924 result[idx] = '\0'; \ 925 } 926 927 result = NULL; 928 size = idx = 0; 929 tmp = NULL; 930 for (i = 0; str[i];) { 931 int qchar, loop_again; 932 size_t len, start, j; 933 934 qchar = 0; 935 loop_again = 1; 936 start = j = i; 937 loop: 938 for (; str[j]; j++) { 939 if (str[j] == '\\' && 940 str[j + 1] == history_expansion_char) { 941 (void)strcpy(&str[j], &str[j + 1]); 942 continue; 943 } 944 if (!loop_again) { 945 if (isspace((unsigned char) str[j]) 946 || str[j] == qchar) 947 break; 948 } 949 if (str[j] == history_expansion_char 950 && !strchr(history_no_expand_chars, str[j + 1]) 951 && (!history_inhibit_expansion_function || 952 (*history_inhibit_expansion_function)(str, 953 (int)j) == 0)) 954 break; 955 } 956 957 if (str[j] && loop_again) { 958 i = j; 959 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 960 j++; 961 if (str[j] == history_expansion_char) 962 j++; 963 loop_again = 0; 964 goto loop; 965 } 966 len = i - start; 967 ADD_STRING(&str[start], len, 0); 968 969 if (str[i] == '\0' || str[i] != history_expansion_char) { 970 len = j - i; 971 ADD_STRING(&str[i], len, 0); 972 if (start == 0) 973 ret = 0; 974 else 975 ret = 1; 976 break; 977 } 978 ret = _history_expand_command (str, i, (j - i), &tmp); 979 if (ret > 0 && tmp) { 980 len = strlen(tmp); 981 ADD_STRING(tmp, len, 1); 982 } 983 if (tmp) { 984 el_free(tmp); 985 tmp = NULL; 986 } 987 i = j; 988 } 989 990 /* ret is 2 for "print only" option */ 991 if (ret == 2) { 992 add_history(result); 993 #ifdef GDB_411_HACK 994 /* gdb 4.11 has been shipped with readline, where */ 995 /* history_expand() returned -1 when the line */ 996 /* should not be executed; in readline 2.1+ */ 997 /* it should return 2 in such a case */ 998 ret = -1; 999 #endif 1000 } 1001 el_free(*output); 1002 *output = result; 1003 1004 return ret; 1005 } 1006 1007 /* 1008 * Return a string consisting of arguments of "str" from "start" to "end". 1009 */ 1010 char * 1011 history_arg_extract(int start, int end, const char *str) 1012 { 1013 size_t i, len, max; 1014 char **arr, *result = NULL; 1015 1016 arr = history_tokenize(str); 1017 if (!arr) 1018 return NULL; 1019 if (arr && *arr == NULL) 1020 goto out; 1021 1022 for (max = 0; arr[max]; max++) 1023 continue; 1024 max--; 1025 1026 if (start == '$') 1027 start = (int)max; 1028 if (end == '$') 1029 end = (int)max; 1030 if (end < 0) 1031 end = (int)max + end + 1; 1032 if (start < 0) 1033 start = end; 1034 1035 if (start < 0 || end < 0 || (size_t)start > max || 1036 (size_t)end > max || start > end) 1037 goto out; 1038 1039 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1040 len += strlen(arr[i]) + 1; 1041 len++; 1042 result = el_malloc(len * sizeof(*result)); 1043 if (result == NULL) 1044 goto out; 1045 1046 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1047 (void)strcpy(result + len, arr[i]); 1048 len += strlen(arr[i]); 1049 if (i < (size_t)end) 1050 result[len++] = ' '; 1051 } 1052 result[len] = '\0'; 1053 1054 out: 1055 for (i = 0; arr[i]; i++) 1056 el_free(arr[i]); 1057 el_free(arr); 1058 1059 return result; 1060 } 1061 1062 /* 1063 * Parse the string into individual tokens, 1064 * similar to how shell would do it. 1065 */ 1066 char ** 1067 history_tokenize(const char *str) 1068 { 1069 int size = 1, idx = 0, i, start; 1070 size_t len; 1071 char **result = NULL, *temp, delim = '\0'; 1072 1073 for (i = 0; str[i];) { 1074 while (isspace((unsigned char) str[i])) 1075 i++; 1076 start = i; 1077 for (; str[i];) { 1078 if (str[i] == '\\') { 1079 if (str[i+1] != '\0') 1080 i++; 1081 } else if (str[i] == delim) 1082 delim = '\0'; 1083 else if (!delim && 1084 (isspace((unsigned char) str[i]) || 1085 strchr("()<>;&|$", str[i]))) 1086 break; 1087 else if (!delim && strchr("'`\"", str[i])) 1088 delim = str[i]; 1089 if (str[i]) 1090 i++; 1091 } 1092 1093 if (idx + 2 >= size) { 1094 char **nresult; 1095 size <<= 1; 1096 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1097 if (nresult == NULL) { 1098 el_free(result); 1099 return NULL; 1100 } 1101 result = nresult; 1102 } 1103 len = (size_t)i - (size_t)start; 1104 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1105 if (temp == NULL) { 1106 for (i = 0; i < idx; i++) 1107 el_free(result[i]); 1108 el_free(result); 1109 return NULL; 1110 } 1111 (void)strncpy(temp, &str[start], len); 1112 temp[len] = '\0'; 1113 result[idx++] = temp; 1114 result[idx] = NULL; 1115 if (str[i]) 1116 i++; 1117 } 1118 return result; 1119 } 1120 1121 1122 /* 1123 * limit size of history record to ``max'' events 1124 */ 1125 void 1126 stifle_history(int max) 1127 { 1128 HistEvent ev; 1129 1130 if (h == NULL || e == NULL) 1131 rl_initialize(); 1132 1133 if (history(h, &ev, H_SETSIZE, max) == 0) 1134 max_input_history = max; 1135 } 1136 1137 1138 /* 1139 * "unlimit" size of history - set the limit to maximum allowed int value 1140 */ 1141 int 1142 unstifle_history(void) 1143 { 1144 HistEvent ev; 1145 int omax; 1146 1147 history(h, &ev, H_SETSIZE, INT_MAX); 1148 omax = max_input_history; 1149 max_input_history = INT_MAX; 1150 return omax; /* some value _must_ be returned */ 1151 } 1152 1153 1154 int 1155 history_is_stifled(void) 1156 { 1157 1158 /* cannot return true answer */ 1159 return max_input_history != INT_MAX; 1160 } 1161 1162 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1163 1164 int 1165 history_truncate_file (const char *filename, int nlines) 1166 { 1167 int ret = 0; 1168 FILE *fp, *tp; 1169 char template[sizeof(_history_tmp_template)]; 1170 char buf[4096]; 1171 int fd; 1172 char *cp; 1173 off_t off; 1174 int count = 0; 1175 ssize_t left = 0; 1176 1177 if (filename == NULL && (filename = _default_history_file()) == NULL) 1178 return errno; 1179 if ((fp = fopen(filename, "r+")) == NULL) 1180 return errno; 1181 strcpy(template, _history_tmp_template); 1182 if ((fd = mkstemp(template)) == -1) { 1183 ret = errno; 1184 goto out1; 1185 } 1186 1187 if ((tp = fdopen(fd, "r+")) == NULL) { 1188 close(fd); 1189 ret = errno; 1190 goto out2; 1191 } 1192 1193 for(;;) { 1194 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1195 if (ferror(fp)) { 1196 ret = errno; 1197 break; 1198 } 1199 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1200 (off_t)-1) { 1201 ret = errno; 1202 break; 1203 } 1204 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1205 if (ferror(fp)) { 1206 ret = errno; 1207 break; 1208 } 1209 if (left == 0) { 1210 count--; 1211 left = sizeof(buf); 1212 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1213 != 1) { 1214 ret = errno; 1215 break; 1216 } 1217 fflush(tp); 1218 break; 1219 } 1220 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1221 ret = errno; 1222 break; 1223 } 1224 count++; 1225 } 1226 if (ret) 1227 goto out3; 1228 cp = buf + left - 1; 1229 if(*cp != '\n') 1230 cp++; 1231 for(;;) { 1232 while (--cp >= buf) { 1233 if (*cp == '\n') { 1234 if (--nlines == 0) { 1235 if (++cp >= buf + sizeof(buf)) { 1236 count++; 1237 cp = buf; 1238 } 1239 break; 1240 } 1241 } 1242 } 1243 if (nlines <= 0 || count == 0) 1244 break; 1245 count--; 1246 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1247 ret = errno; 1248 break; 1249 } 1250 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1251 if (ferror(tp)) { 1252 ret = errno; 1253 break; 1254 } 1255 ret = EAGAIN; 1256 break; 1257 } 1258 cp = buf + sizeof(buf); 1259 } 1260 1261 if (ret || nlines > 0) 1262 goto out3; 1263 1264 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1265 ret = errno; 1266 goto out3; 1267 } 1268 1269 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1270 (off_t)-1) { 1271 ret = errno; 1272 goto out3; 1273 } 1274 1275 for(;;) { 1276 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1277 if (ferror(fp)) 1278 ret = errno; 1279 break; 1280 } 1281 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1282 ret = errno; 1283 break; 1284 } 1285 } 1286 fflush(fp); 1287 if((off = ftello(fp)) > 0) 1288 (void)ftruncate(fileno(fp), off); 1289 out3: 1290 fclose(tp); 1291 out2: 1292 unlink(template); 1293 out1: 1294 fclose(fp); 1295 1296 return ret; 1297 } 1298 1299 1300 /* 1301 * read history from a file given 1302 */ 1303 int 1304 read_history(const char *filename) 1305 { 1306 HistEvent ev; 1307 1308 if (h == NULL || e == NULL) 1309 rl_initialize(); 1310 if (filename == NULL && (filename = _default_history_file()) == NULL) 1311 return errno; 1312 return history(h, &ev, H_LOAD, filename) == -1 ? 1313 (errno ? errno : EINVAL) : 0; 1314 } 1315 1316 1317 /* 1318 * write history to a file given 1319 */ 1320 int 1321 write_history(const char *filename) 1322 { 1323 HistEvent ev; 1324 1325 if (h == NULL || e == NULL) 1326 rl_initialize(); 1327 if (filename == NULL && (filename = _default_history_file()) == NULL) 1328 return errno; 1329 return history(h, &ev, H_SAVE, filename) == -1 ? 1330 (errno ? errno : EINVAL) : 0; 1331 } 1332 1333 1334 /* 1335 * returns history ``num''th event 1336 * 1337 * returned pointer points to static variable 1338 */ 1339 HIST_ENTRY * 1340 history_get(int num) 1341 { 1342 static HIST_ENTRY she; 1343 HistEvent ev; 1344 int curr_num; 1345 1346 if (h == NULL || e == NULL) 1347 rl_initialize(); 1348 1349 /* save current position */ 1350 if (history(h, &ev, H_CURR) != 0) 1351 return NULL; 1352 curr_num = ev.num; 1353 1354 /* start from the oldest */ 1355 if (history(h, &ev, H_LAST) != 0) 1356 return NULL; /* error */ 1357 1358 /* look forwards for event matching specified offset */ 1359 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1360 return NULL; 1361 1362 she.line = ev.str; 1363 1364 /* restore pointer to where it was */ 1365 (void)history(h, &ev, H_SET, curr_num); 1366 1367 return &she; 1368 } 1369 1370 1371 /* 1372 * add the line to history table 1373 */ 1374 int 1375 add_history(const char *line) 1376 { 1377 HistEvent ev; 1378 1379 if (line == NULL) 1380 return 0; 1381 1382 if (h == NULL || e == NULL) 1383 rl_initialize(); 1384 1385 (void)history(h, &ev, H_ENTER, line); 1386 if (history(h, &ev, H_GETSIZE) == 0) 1387 history_length = ev.num; 1388 1389 return !(history_length > 0); /* return 0 if all is okay */ 1390 } 1391 1392 1393 /* 1394 * remove the specified entry from the history list and return it. 1395 */ 1396 HIST_ENTRY * 1397 remove_history(int num) 1398 { 1399 HIST_ENTRY *he; 1400 HistEvent ev; 1401 1402 if (h == NULL || e == NULL) 1403 rl_initialize(); 1404 1405 if ((he = el_malloc(sizeof(*he))) == NULL) 1406 return NULL; 1407 1408 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1409 el_free(he); 1410 return NULL; 1411 } 1412 1413 he->line = ev.str; 1414 if (history(h, &ev, H_GETSIZE) == 0) 1415 history_length = ev.num; 1416 1417 return he; 1418 } 1419 1420 1421 /* 1422 * replace the line and data of the num-th entry 1423 */ 1424 HIST_ENTRY * 1425 replace_history_entry(int num, const char *line, histdata_t data) 1426 { 1427 HIST_ENTRY *he; 1428 HistEvent ev; 1429 int curr_num; 1430 1431 if (h == NULL || e == NULL) 1432 rl_initialize(); 1433 1434 /* save current position */ 1435 if (history(h, &ev, H_CURR) != 0) 1436 return NULL; 1437 curr_num = ev.num; 1438 1439 /* start from the oldest */ 1440 if (history(h, &ev, H_LAST) != 0) 1441 return NULL; /* error */ 1442 1443 if ((he = el_malloc(sizeof(*he))) == NULL) 1444 return NULL; 1445 1446 /* look forwards for event matching specified offset */ 1447 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1448 goto out; 1449 1450 he->line = strdup(ev.str); 1451 if (he->line == NULL) 1452 goto out; 1453 1454 if (history(h, &ev, H_REPLACE, line, data)) 1455 goto out; 1456 1457 /* restore pointer to where it was */ 1458 if (history(h, &ev, H_SET, curr_num)) 1459 goto out; 1460 1461 return he; 1462 out: 1463 el_free(he); 1464 return NULL; 1465 } 1466 1467 /* 1468 * clear the history list - delete all entries 1469 */ 1470 void 1471 clear_history(void) 1472 { 1473 HistEvent ev; 1474 1475 (void)history(h, &ev, H_CLEAR); 1476 history_length = 0; 1477 } 1478 1479 1480 /* 1481 * returns offset of the current history event 1482 */ 1483 int 1484 where_history(void) 1485 { 1486 HistEvent ev; 1487 int curr_num, off; 1488 1489 if (history(h, &ev, H_CURR) != 0) 1490 return 0; 1491 curr_num = ev.num; 1492 1493 (void)history(h, &ev, H_FIRST); 1494 off = 1; 1495 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1496 off++; 1497 1498 return off; 1499 } 1500 1501 1502 /* 1503 * returns current history event or NULL if there is no such event 1504 */ 1505 HIST_ENTRY * 1506 current_history(void) 1507 { 1508 1509 return _move_history(H_CURR); 1510 } 1511 1512 1513 /* 1514 * returns total number of bytes history events' data are using 1515 */ 1516 int 1517 history_total_bytes(void) 1518 { 1519 HistEvent ev; 1520 int curr_num; 1521 size_t size; 1522 1523 if (history(h, &ev, H_CURR) != 0) 1524 return -1; 1525 curr_num = ev.num; 1526 1527 (void)history(h, &ev, H_FIRST); 1528 size = 0; 1529 do 1530 size += strlen(ev.str) * sizeof(*ev.str); 1531 while (history(h, &ev, H_NEXT) == 0); 1532 1533 /* get to the same position as before */ 1534 history(h, &ev, H_PREV_EVENT, curr_num); 1535 1536 return (int)size; 1537 } 1538 1539 1540 /* 1541 * sets the position in the history list to ``pos'' 1542 */ 1543 int 1544 history_set_pos(int pos) 1545 { 1546 HistEvent ev; 1547 int curr_num; 1548 1549 if (pos >= history_length || pos < 0) 1550 return -1; 1551 1552 (void)history(h, &ev, H_CURR); 1553 curr_num = ev.num; 1554 1555 /* 1556 * use H_DELDATA to set to nth history (without delete) by passing 1557 * (void **)-1 1558 */ 1559 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1560 (void)history(h, &ev, H_SET, curr_num); 1561 return -1; 1562 } 1563 return 0; 1564 } 1565 1566 1567 /* 1568 * returns previous event in history and shifts pointer accordingly 1569 */ 1570 HIST_ENTRY * 1571 previous_history(void) 1572 { 1573 1574 return _move_history(H_PREV); 1575 } 1576 1577 1578 /* 1579 * returns next event in history and shifts pointer accordingly 1580 */ 1581 HIST_ENTRY * 1582 next_history(void) 1583 { 1584 1585 return _move_history(H_NEXT); 1586 } 1587 1588 1589 /* 1590 * searches for first history event containing the str 1591 */ 1592 int 1593 history_search(const char *str, int direction) 1594 { 1595 HistEvent ev; 1596 const char *strp; 1597 int curr_num; 1598 1599 if (history(h, &ev, H_CURR) != 0) 1600 return -1; 1601 curr_num = ev.num; 1602 1603 for (;;) { 1604 if ((strp = strstr(ev.str, str)) != NULL) 1605 return (int)(strp - ev.str); 1606 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1607 break; 1608 } 1609 (void)history(h, &ev, H_SET, curr_num); 1610 return -1; 1611 } 1612 1613 1614 /* 1615 * searches for first history event beginning with str 1616 */ 1617 int 1618 history_search_prefix(const char *str, int direction) 1619 { 1620 HistEvent ev; 1621 1622 return (history(h, &ev, direction < 0 ? 1623 H_PREV_STR : H_NEXT_STR, str)); 1624 } 1625 1626 1627 /* 1628 * search for event in history containing str, starting at offset 1629 * abs(pos); continue backward, if pos<0, forward otherwise 1630 */ 1631 /* ARGSUSED */ 1632 int 1633 history_search_pos(const char *str, 1634 int direction __attribute__((__unused__)), int pos) 1635 { 1636 HistEvent ev; 1637 int curr_num, off; 1638 1639 off = (pos > 0) ? pos : -pos; 1640 pos = (pos > 0) ? 1 : -1; 1641 1642 if (history(h, &ev, H_CURR) != 0) 1643 return -1; 1644 curr_num = ev.num; 1645 1646 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1647 return -1; 1648 1649 for (;;) { 1650 if (strstr(ev.str, str)) 1651 return off; 1652 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1653 break; 1654 } 1655 1656 /* set "current" pointer back to previous state */ 1657 (void)history(h, &ev, 1658 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1659 1660 return -1; 1661 } 1662 1663 1664 /********************************/ 1665 /* completion functions */ 1666 1667 char * 1668 tilde_expand(char *name) 1669 { 1670 return fn_tilde_expand(name); 1671 } 1672 1673 char * 1674 filename_completion_function(const char *name, int state) 1675 { 1676 return fn_filename_completion_function(name, state); 1677 } 1678 1679 /* 1680 * a completion generator for usernames; returns _first_ username 1681 * which starts with supplied text 1682 * text contains a partial username preceded by random character 1683 * (usually '~'); state resets search from start (??? should we do that anyway) 1684 * it's callers responsibility to free returned value 1685 */ 1686 char * 1687 username_completion_function(const char *text, int state) 1688 { 1689 struct passwd *pass = NULL; 1690 1691 if (text[0] == '\0') 1692 return NULL; 1693 1694 if (*text == '~') 1695 text++; 1696 1697 if (state == 0) 1698 setpwent(); 1699 1700 while ( 1701 (pass = getpwent()) != NULL 1702 && text[0] == pass->pw_name[0] 1703 && strcmp(text, pass->pw_name) == 0) 1704 continue; 1705 1706 if (pass == NULL) { 1707 endpwent(); 1708 return NULL; 1709 } 1710 return strdup(pass->pw_name); 1711 } 1712 1713 1714 /* 1715 * el-compatible wrapper to send TSTP on ^Z 1716 */ 1717 /* ARGSUSED */ 1718 static unsigned char 1719 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1720 { 1721 (void)kill(0, SIGTSTP); 1722 return CC_NORM; 1723 } 1724 1725 /* 1726 * Display list of strings in columnar format on readline's output stream. 1727 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1728 * 'max' is maximum length of string in 'matches'. 1729 */ 1730 void 1731 rl_display_match_list(char **matches, int len, int max) 1732 { 1733 1734 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1735 } 1736 1737 static const char * 1738 /*ARGSUSED*/ 1739 _rl_completion_append_character_function(const char *dummy 1740 __attribute__((__unused__))) 1741 { 1742 static char buf[2]; 1743 buf[0] = (char)rl_completion_append_character; 1744 buf[1] = '\0'; 1745 return buf; 1746 } 1747 1748 1749 /* 1750 * complete word at current point 1751 */ 1752 /* ARGSUSED */ 1753 int 1754 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1755 { 1756 #ifdef WIDECHAR 1757 static ct_buffer_t wbreak_conv, sprefix_conv; 1758 #endif 1759 char *breakchars; 1760 1761 if (h == NULL || e == NULL) 1762 rl_initialize(); 1763 1764 if (rl_inhibit_completion) { 1765 char arr[2]; 1766 arr[0] = (char)invoking_key; 1767 arr[1] = '\0'; 1768 el_insertstr(e, arr); 1769 return CC_REFRESH; 1770 } 1771 1772 if (rl_completion_word_break_hook != NULL) 1773 breakchars = (*rl_completion_word_break_hook)(); 1774 else 1775 breakchars = rl_basic_word_break_characters; 1776 1777 /* Just look at how many global variables modify this operation! */ 1778 return fn_complete(e, 1779 (CPFunction *)rl_completion_entry_function, 1780 rl_attempted_completion_function, 1781 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1782 ct_decode_string(breakchars, &sprefix_conv), 1783 _rl_completion_append_character_function, 1784 (size_t)rl_completion_query_items, 1785 &rl_completion_type, &rl_attempted_completion_over, 1786 &rl_point, &rl_end); 1787 1788 1789 } 1790 1791 1792 /* ARGSUSED */ 1793 static unsigned char 1794 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1795 { 1796 return (unsigned char)rl_complete(0, ch); 1797 } 1798 1799 /* 1800 * misc other functions 1801 */ 1802 1803 /* 1804 * bind key c to readline-type function func 1805 */ 1806 int 1807 rl_bind_key(int c, rl_command_func_t *func) 1808 { 1809 int retval = -1; 1810 1811 if (h == NULL || e == NULL) 1812 rl_initialize(); 1813 1814 if (func == rl_insert) { 1815 /* XXX notice there is no range checking of ``c'' */ 1816 e->el_map.key[c] = ED_INSERT; 1817 retval = 0; 1818 } 1819 return retval; 1820 } 1821 1822 1823 /* 1824 * read one key from input - handles chars pushed back 1825 * to input stream also 1826 */ 1827 int 1828 rl_read_key(void) 1829 { 1830 char fooarr[2 * sizeof(int)]; 1831 1832 if (e == NULL || h == NULL) 1833 rl_initialize(); 1834 1835 return el_getc(e, fooarr); 1836 } 1837 1838 1839 /* 1840 * reset the terminal 1841 */ 1842 /* ARGSUSED */ 1843 void 1844 rl_reset_terminal(const char *p __attribute__((__unused__))) 1845 { 1846 1847 if (h == NULL || e == NULL) 1848 rl_initialize(); 1849 el_reset(e); 1850 } 1851 1852 1853 /* 1854 * insert character ``c'' back into input stream, ``count'' times 1855 */ 1856 int 1857 rl_insert(int count, int c) 1858 { 1859 char arr[2]; 1860 1861 if (h == NULL || e == NULL) 1862 rl_initialize(); 1863 1864 /* XXX - int -> char conversion can lose on multichars */ 1865 arr[0] = (char)c; 1866 arr[1] = '\0'; 1867 1868 for (; count > 0; count--) 1869 el_push(e, arr); 1870 1871 return 0; 1872 } 1873 1874 int 1875 rl_insert_text(const char *text) 1876 { 1877 if (!text || *text == 0) 1878 return 0; 1879 1880 if (h == NULL || e == NULL) 1881 rl_initialize(); 1882 1883 if (el_insertstr(e, text) < 0) 1884 return 0; 1885 return (int)strlen(text); 1886 } 1887 1888 /*ARGSUSED*/ 1889 int 1890 rl_newline(int count __attribute__((__unused__)), 1891 int c __attribute__((__unused__))) 1892 { 1893 /* 1894 * Readline-4.0 appears to ignore the args. 1895 */ 1896 return rl_insert(1, '\n'); 1897 } 1898 1899 /*ARGSUSED*/ 1900 static unsigned char 1901 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1902 { 1903 if (map[c] == NULL) 1904 return CC_ERROR; 1905 1906 _rl_update_pos(); 1907 1908 (*map[c])(NULL, c); 1909 1910 /* If rl_done was set by the above call, deal with it here */ 1911 if (rl_done) 1912 return CC_EOF; 1913 1914 return CC_NORM; 1915 } 1916 1917 int 1918 rl_add_defun(const char *name, Function *fun, int c) 1919 { 1920 char dest[8]; 1921 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1922 return -1; 1923 map[(unsigned char)c] = fun; 1924 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1925 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1926 el_set(e, EL_BIND, dest, name, NULL); 1927 return 0; 1928 } 1929 1930 void 1931 rl_callback_read_char(void) 1932 { 1933 int count = 0, done = 0; 1934 const char *buf = el_gets(e, &count); 1935 char *wbuf; 1936 1937 if (buf == NULL || count-- <= 0) 1938 return; 1939 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1940 done = 1; 1941 if (buf[count] == '\n' || buf[count] == '\r') 1942 done = 2; 1943 1944 if (done && rl_linefunc != NULL) { 1945 el_set(e, EL_UNBUFFERED, 0); 1946 if (done == 2) { 1947 if ((wbuf = strdup(buf)) != NULL) 1948 wbuf[count] = '\0'; 1949 } else 1950 wbuf = NULL; 1951 (*(void (*)(const char *))rl_linefunc)(wbuf); 1952 //el_set(e, EL_UNBUFFERED, 1); 1953 } 1954 } 1955 1956 void 1957 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1958 { 1959 if (e == NULL) { 1960 rl_initialize(); 1961 } 1962 (void)rl_set_prompt(prompt); 1963 rl_linefunc = linefunc; 1964 el_set(e, EL_UNBUFFERED, 1); 1965 } 1966 1967 void 1968 rl_callback_handler_remove(void) 1969 { 1970 el_set(e, EL_UNBUFFERED, 0); 1971 rl_linefunc = NULL; 1972 } 1973 1974 void 1975 rl_redisplay(void) 1976 { 1977 char a[2]; 1978 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 1979 a[1] = '\0'; 1980 el_push(e, a); 1981 } 1982 1983 int 1984 rl_get_previous_history(int count, int key) 1985 { 1986 char a[2]; 1987 a[0] = (char)key; 1988 a[1] = '\0'; 1989 while (count--) 1990 el_push(e, a); 1991 return 0; 1992 } 1993 1994 void 1995 /*ARGSUSED*/ 1996 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 1997 { 1998 el_set(e, EL_PREP_TERM, 1); 1999 } 2000 2001 void 2002 rl_deprep_terminal(void) 2003 { 2004 el_set(e, EL_PREP_TERM, 0); 2005 } 2006 2007 int 2008 rl_read_init_file(const char *s) 2009 { 2010 return el_source(e, s); 2011 } 2012 2013 int 2014 rl_parse_and_bind(const char *line) 2015 { 2016 const char **argv; 2017 int argc; 2018 Tokenizer *tok; 2019 2020 tok = tok_init(NULL); 2021 tok_str(tok, line, &argc, &argv); 2022 argc = el_parse(e, argc, argv); 2023 tok_end(tok); 2024 return argc ? 1 : 0; 2025 } 2026 2027 int 2028 rl_variable_bind(const char *var, const char *value) 2029 { 2030 /* 2031 * The proper return value is undocument, but this is what the 2032 * readline source seems to do. 2033 */ 2034 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2035 } 2036 2037 void 2038 rl_stuff_char(int c) 2039 { 2040 char buf[2]; 2041 2042 buf[0] = (char)c; 2043 buf[1] = '\0'; 2044 el_insertstr(e, buf); 2045 } 2046 2047 static int 2048 _rl_event_read_char(EditLine *el, char *cp) 2049 { 2050 int n; 2051 ssize_t num_read = 0; 2052 2053 *cp = '\0'; 2054 while (rl_event_hook) { 2055 2056 (*rl_event_hook)(); 2057 2058 #if defined(FIONREAD) 2059 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2060 return -1; 2061 if (n) 2062 num_read = read(el->el_infd, cp, (size_t)1); 2063 else 2064 num_read = 0; 2065 #elif defined(F_SETFL) && defined(O_NDELAY) 2066 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2067 return -1; 2068 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2069 return -1; 2070 num_read = read(el->el_infd, cp, 1); 2071 if (fcntl(el->el_infd, F_SETFL, n)) 2072 return -1; 2073 #else 2074 /* not non-blocking, but what you gonna do? */ 2075 num_read = read(el->el_infd, cp, 1); 2076 return -1; 2077 #endif 2078 2079 if (num_read < 0 && errno == EAGAIN) 2080 continue; 2081 if (num_read == 0) 2082 continue; 2083 break; 2084 } 2085 if (!rl_event_hook) 2086 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2087 return (int)num_read; 2088 } 2089 2090 static void 2091 _rl_update_pos(void) 2092 { 2093 const LineInfo *li = el_line(e); 2094 2095 rl_point = (int)(li->cursor - li->buffer); 2096 rl_end = (int)(li->lastchar - li->buffer); 2097 } 2098 2099 void 2100 rl_get_screen_size(int *rows, int *cols) 2101 { 2102 if (rows) 2103 el_get(e, EL_GETTC, "li", rows, NULL); 2104 if (cols) 2105 el_get(e, EL_GETTC, "co", cols, NULL); 2106 } 2107 2108 void 2109 rl_set_screen_size(int rows, int cols) 2110 { 2111 char buf[64]; 2112 (void)snprintf(buf, sizeof(buf), "%d", rows); 2113 el_set(e, EL_SETTC, "li", buf, NULL); 2114 (void)snprintf(buf, sizeof(buf), "%d", cols); 2115 el_set(e, EL_SETTC, "co", buf, NULL); 2116 } 2117 2118 char ** 2119 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2120 { 2121 size_t len, max, i, j, min; 2122 char **list, *match, *a, *b; 2123 2124 len = 1; 2125 max = 10; 2126 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2127 return NULL; 2128 2129 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2130 list[len++] = match; 2131 if (len == max) { 2132 char **nl; 2133 max += 10; 2134 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2135 goto out; 2136 list = nl; 2137 } 2138 } 2139 if (len == 1) 2140 goto out; 2141 list[len] = NULL; 2142 if (len == 2) { 2143 if ((list[0] = strdup(list[1])) == NULL) 2144 goto out; 2145 return list; 2146 } 2147 qsort(&list[1], len - 1, sizeof(*list), 2148 (int (*)(const void *, const void *)) strcmp); 2149 min = SIZE_T_MAX; 2150 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2151 b = list[i + 1]; 2152 for (j = 0; a[j] && a[j] == b[j]; j++) 2153 continue; 2154 if (min > j) 2155 min = j; 2156 } 2157 if (min == 0 && *str) { 2158 if ((list[0] = strdup(str)) == NULL) 2159 goto out; 2160 } else { 2161 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2162 goto out; 2163 (void)memcpy(list[0], list[1], min); 2164 list[0][min] = '\0'; 2165 } 2166 return list; 2167 2168 out: 2169 el_free(list); 2170 return NULL; 2171 } 2172 2173 char * 2174 rl_filename_completion_function (const char *text, int state) 2175 { 2176 return fn_filename_completion_function(text, state); 2177 } 2178 2179 void 2180 rl_forced_update_display(void) 2181 { 2182 el_set(e, EL_REFRESH); 2183 } 2184 2185 int 2186 _rl_abort_internal(void) 2187 { 2188 el_beep(e); 2189 longjmp(topbuf, 1); 2190 /*NOTREACHED*/ 2191 } 2192 2193 int 2194 _rl_qsort_string_compare(char **s1, char **s2) 2195 { 2196 return strcoll(*s1, *s2); 2197 } 2198 2199 HISTORY_STATE * 2200 history_get_history_state(void) 2201 { 2202 HISTORY_STATE *hs; 2203 2204 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2205 return NULL; 2206 hs->length = history_length; 2207 return hs; 2208 } 2209 2210 int 2211 /*ARGSUSED*/ 2212 rl_kill_text(int from __attribute__((__unused__)), 2213 int to __attribute__((__unused__))) 2214 { 2215 return 0; 2216 } 2217 2218 Keymap 2219 rl_make_bare_keymap(void) 2220 { 2221 return NULL; 2222 } 2223 2224 Keymap 2225 rl_get_keymap(void) 2226 { 2227 return NULL; 2228 } 2229 2230 void 2231 /*ARGSUSED*/ 2232 rl_set_keymap(Keymap k __attribute__((__unused__))) 2233 { 2234 } 2235 2236 int 2237 /*ARGSUSED*/ 2238 rl_generic_bind(int type __attribute__((__unused__)), 2239 const char * keyseq __attribute__((__unused__)), 2240 const char * data __attribute__((__unused__)), 2241 Keymap k __attribute__((__unused__))) 2242 { 2243 return 0; 2244 } 2245 2246 int 2247 /*ARGSUSED*/ 2248 rl_bind_key_in_map(int key __attribute__((__unused__)), 2249 rl_command_func_t *fun __attribute__((__unused__)), 2250 Keymap k __attribute__((__unused__))) 2251 { 2252 return 0; 2253 } 2254 2255 /* unsupported, but needed by python */ 2256 void 2257 rl_cleanup_after_signal(void) 2258 { 2259 } 2260 2261 int 2262 rl_on_new_line(void) 2263 { 2264 return 0; 2265 } 2266 2267 void 2268 rl_free_line_state(void) 2269 { 2270 } 2271