1 /* $NetBSD: readline.c,v 1.109 2013/08/28 08:05:21 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 1.109 2013/08/28 08:05:21 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #include <vis.h> 51 52 #include "readline/readline.h" 53 #include "el.h" 54 #include "fcns.h" /* for EL_NUM_FCNS */ 55 #include "histedit.h" 56 #include "filecomplete.h" 57 58 void rl_prep_terminal(int); 59 void rl_deprep_terminal(void); 60 61 /* for rl_complete() */ 62 #define TAB '\r' 63 64 /* see comment at the #ifdef for sense of this */ 65 /* #define GDB_411_HACK */ 66 67 /* readline compatibility stuff - look at readline sources/documentation */ 68 /* to see what these variables mean */ 69 const char *rl_library_version = "EditLine wrapper"; 70 int rl_readline_version = RL_READLINE_VERSION; 71 static char empty[] = { '\0' }; 72 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 73 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 74 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 75 char *rl_readline_name = empty; 76 FILE *rl_instream = NULL; 77 FILE *rl_outstream = NULL; 78 int rl_point = 0; 79 int rl_end = 0; 80 char *rl_line_buffer = NULL; 81 VCPFunction *rl_linefunc = NULL; 82 int rl_done = 0; 83 VFunction *rl_event_hook = NULL; 84 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 85 emacs_meta_keymap, 86 emacs_ctlx_keymap; 87 /* 88 * The following is not implemented; we always catch signals in the 89 * libedit fashion: set handlers on entry to el_gets() and clear them 90 * on the way out. This simplistic approach works for most cases; if 91 * it does not work for your application, please let us know. 92 */ 93 int rl_catch_signals = 1; 94 int rl_catch_sigwinch = 1; 95 96 int history_base = 1; /* probably never subject to change */ 97 int history_length = 0; 98 int max_input_history = 0; 99 char history_expansion_char = '!'; 100 char history_subst_char = '^'; 101 char *history_no_expand_chars = expand_chars; 102 Function *history_inhibit_expansion_function = NULL; 103 char *history_arg_extract(int start, int end, const char *str); 104 105 int rl_inhibit_completion = 0; 106 int rl_attempted_completion_over = 0; 107 char *rl_basic_word_break_characters = break_chars; 108 char *rl_completer_word_break_characters = NULL; 109 char *rl_completer_quote_characters = NULL; 110 Function *rl_completion_entry_function = NULL; 111 char *(*rl_completion_word_break_hook)(void) = NULL; 112 CPPFunction *rl_attempted_completion_function = NULL; 113 Function *rl_pre_input_hook = NULL; 114 Function *rl_startup1_hook = NULL; 115 int (*rl_getc_function)(FILE *) = NULL; 116 char *rl_terminal_name = NULL; 117 int rl_already_prompted = 0; 118 int rl_filename_completion_desired = 0; 119 int rl_ignore_completion_duplicates = 0; 120 int readline_echoing_p = 1; 121 int _rl_print_completions_horizontally = 0; 122 VFunction *rl_redisplay_function = NULL; 123 Function *rl_startup_hook = NULL; 124 VFunction *rl_completion_display_matches_hook = NULL; 125 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 126 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 127 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 128 129 /* 130 * The current prompt string. 131 */ 132 char *rl_prompt = NULL; 133 /* 134 * This is set to character indicating type of completion being done by 135 * rl_complete_internal(); this is available for application completion 136 * functions. 137 */ 138 int rl_completion_type = 0; 139 140 /* 141 * If more than this number of items results from query for possible 142 * completions, we ask user if they are sure to really display the list. 143 */ 144 int rl_completion_query_items = 100; 145 146 /* 147 * List of characters which are word break characters, but should be left 148 * in the parsed text when it is passed to the completion function. 149 * Shell uses this to help determine what kind of completing to do. 150 */ 151 char *rl_special_prefixes = NULL; 152 153 /* 154 * This is the character appended to the completed words if at the end of 155 * the line. Default is ' ' (a space). 156 */ 157 int rl_completion_append_character = ' '; 158 159 /* stuff below is used internally by libedit for readline emulation */ 160 161 static History *h = NULL; 162 static EditLine *e = NULL; 163 static Function *map[256]; 164 static jmp_buf topbuf; 165 166 /* internal functions */ 167 static unsigned char _el_rl_complete(EditLine *, int); 168 static unsigned char _el_rl_tstp(EditLine *, int); 169 static char *_get_prompt(EditLine *); 170 static int _getc_function(EditLine *, char *); 171 static HIST_ENTRY *_move_history(int); 172 static int _history_expand_command(const char *, size_t, size_t, 173 char **); 174 static char *_rl_compat_sub(const char *, const char *, 175 const char *, int); 176 static int _rl_event_read_char(EditLine *, char *); 177 static void _rl_update_pos(void); 178 179 180 /* ARGSUSED */ 181 static char * 182 _get_prompt(EditLine *el __attribute__((__unused__))) 183 { 184 rl_already_prompted = 1; 185 return rl_prompt; 186 } 187 188 189 /* 190 * generic function for moving around history 191 */ 192 static HIST_ENTRY * 193 _move_history(int op) 194 { 195 HistEvent ev; 196 static HIST_ENTRY rl_he; 197 198 if (history(h, &ev, op) != 0) 199 return NULL; 200 201 rl_he.line = ev.str; 202 rl_he.data = NULL; 203 204 return &rl_he; 205 } 206 207 208 /* 209 * read one key from user defined input function 210 */ 211 static int 212 /*ARGSUSED*/ 213 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 214 { 215 int i; 216 217 i = (*rl_getc_function)(NULL); 218 if (i == -1) 219 return 0; 220 *c = (char)i; 221 return 1; 222 } 223 224 static void 225 _resize_fun(EditLine *el, void *a) 226 { 227 const LineInfo *li; 228 char **ap = a; 229 230 li = el_line(el); 231 /* a cheesy way to get rid of const cast. */ 232 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 233 } 234 235 static const char * 236 _default_history_file(void) 237 { 238 struct passwd *p; 239 static char *path; 240 size_t len; 241 242 if (path) 243 return path; 244 245 if ((p = getpwuid(getuid())) == NULL) 246 return NULL; 247 248 len = strlen(p->pw_dir) + sizeof("/.history"); 249 if ((path = malloc(len)) == NULL) 250 return NULL; 251 252 (void)snprintf(path, len, "%s/.history", p->pw_dir); 253 return path; 254 } 255 256 /* 257 * READLINE compatibility stuff 258 */ 259 260 /* 261 * Set the prompt 262 */ 263 int 264 rl_set_prompt(const char *prompt) 265 { 266 char *p; 267 268 if (!prompt) 269 prompt = ""; 270 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 271 return 0; 272 if (rl_prompt) 273 el_free(rl_prompt); 274 rl_prompt = strdup(prompt); 275 if (rl_prompt == NULL) 276 return -1; 277 278 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 279 *p = RL_PROMPT_START_IGNORE; 280 281 return 0; 282 } 283 284 /* 285 * initialize rl compat stuff 286 */ 287 int 288 rl_initialize(void) 289 { 290 HistEvent ev; 291 int editmode = 1; 292 struct termios t; 293 294 if (e != NULL) 295 el_end(e); 296 if (h != NULL) 297 history_end(h); 298 299 if (!rl_instream) 300 rl_instream = stdin; 301 if (!rl_outstream) 302 rl_outstream = stdout; 303 304 /* 305 * See if we don't really want to run the editor 306 */ 307 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 308 editmode = 0; 309 310 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 311 312 if (!editmode) 313 el_set(e, EL_EDITMODE, 0); 314 315 h = history_init(); 316 if (!e || !h) 317 return -1; 318 319 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 320 history_length = 0; 321 max_input_history = INT_MAX; 322 el_set(e, EL_HIST, history, h); 323 324 /* Setup resize function */ 325 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 326 327 /* setup getc function if valid */ 328 if (rl_getc_function) 329 el_set(e, EL_GETCFN, _getc_function); 330 331 /* for proper prompt printing in readline() */ 332 if (rl_set_prompt("") == -1) { 333 history_end(h); 334 el_end(e); 335 return -1; 336 } 337 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 338 el_set(e, EL_SIGNAL, rl_catch_signals); 339 340 /* set default mode to "emacs"-style and read setting afterwards */ 341 /* so this can be overriden */ 342 el_set(e, EL_EDITOR, "emacs"); 343 if (rl_terminal_name != NULL) 344 el_set(e, EL_TERMINAL, rl_terminal_name); 345 else 346 el_get(e, EL_TERMINAL, &rl_terminal_name); 347 348 /* 349 * Word completion - this has to go AFTER rebinding keys 350 * to emacs-style. 351 */ 352 el_set(e, EL_ADDFN, "rl_complete", 353 "ReadLine compatible completion function", 354 _el_rl_complete); 355 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 356 357 /* 358 * Send TSTP when ^Z is pressed. 359 */ 360 el_set(e, EL_ADDFN, "rl_tstp", 361 "ReadLine compatible suspend function", 362 _el_rl_tstp); 363 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 364 365 /* read settings from configuration file */ 366 el_source(e, NULL); 367 368 /* 369 * Unfortunately, some applications really do use rl_point 370 * and rl_line_buffer directly. 371 */ 372 _resize_fun(e, &rl_line_buffer); 373 _rl_update_pos(); 374 375 if (rl_startup_hook) 376 (*rl_startup_hook)(NULL, 0); 377 378 return 0; 379 } 380 381 382 /* 383 * read one line from input stream and return it, chomping 384 * trailing newline (if there is any) 385 */ 386 char * 387 readline(const char *p) 388 { 389 HistEvent ev; 390 const char * volatile prompt = p; 391 int count; 392 const char *ret; 393 char *buf; 394 static int used_event_hook; 395 396 if (e == NULL || h == NULL) 397 rl_initialize(); 398 399 rl_done = 0; 400 401 (void)setjmp(topbuf); 402 403 /* update prompt accordingly to what has been passed */ 404 if (rl_set_prompt(prompt) == -1) 405 return NULL; 406 407 if (rl_pre_input_hook) 408 (*rl_pre_input_hook)(NULL, 0); 409 410 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 411 el_set(e, EL_GETCFN, _rl_event_read_char); 412 used_event_hook = 1; 413 } 414 415 if (!rl_event_hook && used_event_hook) { 416 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 417 used_event_hook = 0; 418 } 419 420 rl_already_prompted = 0; 421 422 /* get one line from input stream */ 423 ret = el_gets(e, &count); 424 425 if (ret && count > 0) { 426 int lastidx; 427 428 buf = strdup(ret); 429 if (buf == NULL) 430 return NULL; 431 lastidx = count - 1; 432 if (buf[lastidx] == '\n') 433 buf[lastidx] = '\0'; 434 } else 435 buf = NULL; 436 437 history(h, &ev, H_GETSIZE); 438 history_length = ev.num; 439 440 return buf; 441 } 442 443 /* 444 * history functions 445 */ 446 447 /* 448 * is normally called before application starts to use 449 * history expansion functions 450 */ 451 void 452 using_history(void) 453 { 454 if (h == NULL || e == NULL) 455 rl_initialize(); 456 } 457 458 459 /* 460 * substitute ``what'' with ``with'', returning resulting string; if 461 * globally == 1, substitutes all occurrences of what, otherwise only the 462 * first one 463 */ 464 static char * 465 _rl_compat_sub(const char *str, const char *what, const char *with, 466 int globally) 467 { 468 const char *s; 469 char *r, *result; 470 size_t len, with_len, what_len; 471 472 len = strlen(str); 473 with_len = strlen(with); 474 what_len = strlen(what); 475 476 /* calculate length we need for result */ 477 s = str; 478 while (*s) { 479 if (*s == *what && !strncmp(s, what, what_len)) { 480 len += with_len - what_len; 481 if (!globally) 482 break; 483 s += what_len; 484 } else 485 s++; 486 } 487 r = result = el_malloc((len + 1) * sizeof(*r)); 488 if (result == NULL) 489 return NULL; 490 s = str; 491 while (*s) { 492 if (*s == *what && !strncmp(s, what, what_len)) { 493 (void)strncpy(r, with, with_len); 494 r += with_len; 495 s += what_len; 496 if (!globally) { 497 (void)strcpy(r, s); 498 return result; 499 } 500 } else 501 *r++ = *s++; 502 } 503 *r = '\0'; 504 return result; 505 } 506 507 static char *last_search_pat; /* last !?pat[?] search pattern */ 508 static char *last_search_match; /* last !?pat[?] that matched */ 509 510 const char * 511 get_history_event(const char *cmd, int *cindex, int qchar) 512 { 513 int idx, sign, sub, num, begin, ret; 514 size_t len; 515 char *pat; 516 const char *rptr; 517 HistEvent ev; 518 519 idx = *cindex; 520 if (cmd[idx++] != history_expansion_char) 521 return NULL; 522 523 /* find out which event to take */ 524 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 525 if (history(h, &ev, H_FIRST) != 0) 526 return NULL; 527 *cindex = cmd[idx]? (idx + 1):idx; 528 return ev.str; 529 } 530 sign = 0; 531 if (cmd[idx] == '-') { 532 sign = 1; 533 idx++; 534 } 535 536 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 537 HIST_ENTRY *rl_he; 538 539 num = 0; 540 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 541 num = num * 10 + cmd[idx] - '0'; 542 idx++; 543 } 544 if (sign) 545 num = history_length - num + 1; 546 547 if (!(rl_he = history_get(num))) 548 return NULL; 549 550 *cindex = idx; 551 return rl_he->line; 552 } 553 sub = 0; 554 if (cmd[idx] == '?') { 555 sub = 1; 556 idx++; 557 } 558 begin = idx; 559 while (cmd[idx]) { 560 if (cmd[idx] == '\n') 561 break; 562 if (sub && cmd[idx] == '?') 563 break; 564 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 565 || cmd[idx] == '\t' || cmd[idx] == qchar)) 566 break; 567 idx++; 568 } 569 len = (size_t)idx - (size_t)begin; 570 if (sub && cmd[idx] == '?') 571 idx++; 572 if (sub && len == 0 && last_search_pat && *last_search_pat) 573 pat = last_search_pat; 574 else if (len == 0) 575 return NULL; 576 else { 577 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 578 return NULL; 579 (void)strncpy(pat, cmd + begin, len); 580 pat[len] = '\0'; 581 } 582 583 if (history(h, &ev, H_CURR) != 0) { 584 if (pat != last_search_pat) 585 el_free(pat); 586 return NULL; 587 } 588 num = ev.num; 589 590 if (sub) { 591 if (pat != last_search_pat) { 592 if (last_search_pat) 593 el_free(last_search_pat); 594 last_search_pat = pat; 595 } 596 ret = history_search(pat, -1); 597 } else 598 ret = history_search_prefix(pat, -1); 599 600 if (ret == -1) { 601 /* restore to end of list on failed search */ 602 history(h, &ev, H_FIRST); 603 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 604 if (pat != last_search_pat) 605 el_free(pat); 606 return NULL; 607 } 608 609 if (sub && len) { 610 if (last_search_match && last_search_match != pat) 611 el_free(last_search_match); 612 last_search_match = pat; 613 } 614 615 if (pat != last_search_pat) 616 el_free(pat); 617 618 if (history(h, &ev, H_CURR) != 0) 619 return NULL; 620 *cindex = idx; 621 rptr = ev.str; 622 623 /* roll back to original position */ 624 (void)history(h, &ev, H_SET, num); 625 626 return rptr; 627 } 628 629 /* 630 * the real function doing history expansion - takes as argument command 631 * to do and data upon which the command should be executed 632 * does expansion the way I've understood readline documentation 633 * 634 * returns 0 if data was not modified, 1 if it was and 2 if the string 635 * should be only printed and not executed; in case of error, 636 * returns -1 and *result points to NULL 637 * it's callers responsibility to free() string returned in *result 638 */ 639 static int 640 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 641 char **result) 642 { 643 char *tmp, *search = NULL, *aptr; 644 const char *ptr, *cmd; 645 static char *from = NULL, *to = NULL; 646 int start, end, idx, has_mods = 0; 647 int p_on = 0, g_on = 0; 648 649 *result = NULL; 650 aptr = NULL; 651 ptr = NULL; 652 653 /* First get event specifier */ 654 idx = 0; 655 656 if (strchr(":^*$", command[offs + 1])) { 657 char str[4]; 658 /* 659 * "!:" is shorthand for "!!:". 660 * "!^", "!*" and "!$" are shorthand for 661 * "!!:^", "!!:*" and "!!:$" respectively. 662 */ 663 str[0] = str[1] = '!'; 664 str[2] = '0'; 665 ptr = get_history_event(str, &idx, 0); 666 idx = (command[offs + 1] == ':')? 1:0; 667 has_mods = 1; 668 } else { 669 if (command[offs + 1] == '#') { 670 /* use command so far */ 671 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 672 == NULL) 673 return -1; 674 (void)strncpy(aptr, command, offs); 675 aptr[offs] = '\0'; 676 idx = 1; 677 } else { 678 int qchar; 679 680 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 681 ptr = get_history_event(command + offs, &idx, qchar); 682 } 683 has_mods = command[offs + (size_t)idx] == ':'; 684 } 685 686 if (ptr == NULL && aptr == NULL) 687 return -1; 688 689 if (!has_mods) { 690 *result = strdup(aptr ? aptr : ptr); 691 if (aptr) 692 el_free(aptr); 693 if (*result == NULL) 694 return -1; 695 return 1; 696 } 697 698 cmd = command + offs + idx + 1; 699 700 /* Now parse any word designators */ 701 702 if (*cmd == '%') /* last word matched by ?pat? */ 703 tmp = strdup(last_search_match? last_search_match:""); 704 else if (strchr("^*$-0123456789", *cmd)) { 705 start = end = -1; 706 if (*cmd == '^') 707 start = end = 1, cmd++; 708 else if (*cmd == '$') 709 start = -1, cmd++; 710 else if (*cmd == '*') 711 start = 1, cmd++; 712 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 713 start = 0; 714 while (*cmd && '0' <= *cmd && *cmd <= '9') 715 start = start * 10 + *cmd++ - '0'; 716 717 if (*cmd == '-') { 718 if (isdigit((unsigned char) cmd[1])) { 719 cmd++; 720 end = 0; 721 while (*cmd && '0' <= *cmd && *cmd <= '9') 722 end = end * 10 + *cmd++ - '0'; 723 } else if (cmd[1] == '$') { 724 cmd += 2; 725 end = -1; 726 } else { 727 cmd++; 728 end = -2; 729 } 730 } else if (*cmd == '*') 731 end = -1, cmd++; 732 else 733 end = start; 734 } 735 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 736 if (tmp == NULL) { 737 (void)fprintf(rl_outstream, "%s: Bad word specifier", 738 command + offs + idx); 739 if (aptr) 740 el_free(aptr); 741 return -1; 742 } 743 } else 744 tmp = strdup(aptr? aptr:ptr); 745 746 if (aptr) 747 el_free(aptr); 748 749 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 750 *result = tmp; 751 return 1; 752 } 753 754 for (; *cmd; cmd++) { 755 if (*cmd == ':') 756 continue; 757 else if (*cmd == 'h') { /* remove trailing path */ 758 if ((aptr = strrchr(tmp, '/')) != NULL) 759 *aptr = '\0'; 760 } else if (*cmd == 't') { /* remove leading path */ 761 if ((aptr = strrchr(tmp, '/')) != NULL) { 762 aptr = strdup(aptr + 1); 763 el_free(tmp); 764 tmp = aptr; 765 } 766 } else if (*cmd == 'r') { /* remove trailing suffix */ 767 if ((aptr = strrchr(tmp, '.')) != NULL) 768 *aptr = '\0'; 769 } else if (*cmd == 'e') { /* remove all but suffix */ 770 if ((aptr = strrchr(tmp, '.')) != NULL) { 771 aptr = strdup(aptr); 772 el_free(tmp); 773 tmp = aptr; 774 } 775 } else if (*cmd == 'p') /* print only */ 776 p_on = 1; 777 else if (*cmd == 'g') 778 g_on = 2; 779 else if (*cmd == 's' || *cmd == '&') { 780 char *what, *with, delim; 781 size_t len, from_len; 782 size_t size; 783 784 if (*cmd == '&' && (from == NULL || to == NULL)) 785 continue; 786 else if (*cmd == 's') { 787 delim = *(++cmd), cmd++; 788 size = 16; 789 what = el_realloc(from, size * sizeof(*what)); 790 if (what == NULL) { 791 el_free(from); 792 el_free(tmp); 793 return 0; 794 } 795 len = 0; 796 for (; *cmd && *cmd != delim; cmd++) { 797 if (*cmd == '\\' && cmd[1] == delim) 798 cmd++; 799 if (len >= size) { 800 char *nwhat; 801 nwhat = el_realloc(what, 802 (size <<= 1) * 803 sizeof(*nwhat)); 804 if (nwhat == NULL) { 805 el_free(what); 806 el_free(tmp); 807 return 0; 808 } 809 what = nwhat; 810 } 811 what[len++] = *cmd; 812 } 813 what[len] = '\0'; 814 from = what; 815 if (*what == '\0') { 816 el_free(what); 817 if (search) { 818 from = strdup(search); 819 if (from == NULL) { 820 el_free(tmp); 821 return 0; 822 } 823 } else { 824 from = NULL; 825 el_free(tmp); 826 return -1; 827 } 828 } 829 cmd++; /* shift after delim */ 830 if (!*cmd) 831 continue; 832 833 size = 16; 834 with = el_realloc(to, size * sizeof(*with)); 835 if (with == NULL) { 836 el_free(to); 837 el_free(tmp); 838 return -1; 839 } 840 len = 0; 841 from_len = strlen(from); 842 for (; *cmd && *cmd != delim; cmd++) { 843 if (len + from_len + 1 >= size) { 844 char *nwith; 845 size += from_len + 1; 846 nwith = el_realloc(with, 847 size * sizeof(*nwith)); 848 if (nwith == NULL) { 849 el_free(with); 850 el_free(tmp); 851 return -1; 852 } 853 with = nwith; 854 } 855 if (*cmd == '&') { 856 /* safe */ 857 (void)strcpy(&with[len], from); 858 len += from_len; 859 continue; 860 } 861 if (*cmd == '\\' 862 && (*(cmd + 1) == delim 863 || *(cmd + 1) == '&')) 864 cmd++; 865 with[len++] = *cmd; 866 } 867 with[len] = '\0'; 868 to = with; 869 } 870 871 aptr = _rl_compat_sub(tmp, from, to, g_on); 872 if (aptr) { 873 el_free(tmp); 874 tmp = aptr; 875 } 876 g_on = 0; 877 } 878 } 879 *result = tmp; 880 return p_on? 2:1; 881 } 882 883 884 /* 885 * csh-style history expansion 886 */ 887 int 888 history_expand(char *str, char **output) 889 { 890 int ret = 0; 891 size_t idx, i, size; 892 char *tmp, *result; 893 894 if (h == NULL || e == NULL) 895 rl_initialize(); 896 897 if (history_expansion_char == 0) { 898 *output = strdup(str); 899 return 0; 900 } 901 902 *output = NULL; 903 if (str[0] == history_subst_char) { 904 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 905 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 906 if (*output == NULL) 907 return 0; 908 (*output)[0] = (*output)[1] = history_expansion_char; 909 (*output)[2] = ':'; 910 (*output)[3] = 's'; 911 (void)strcpy((*output) + 4, str); 912 str = *output; 913 } else { 914 *output = strdup(str); 915 if (*output == NULL) 916 return 0; 917 } 918 919 #define ADD_STRING(what, len, fr) \ 920 { \ 921 if (idx + len + 1 > size) { \ 922 char *nresult = el_realloc(result, \ 923 (size += len + 1) * sizeof(*nresult)); \ 924 if (nresult == NULL) { \ 925 el_free(*output); \ 926 if (/*CONSTCOND*/fr) \ 927 el_free(tmp); \ 928 return 0; \ 929 } \ 930 result = nresult; \ 931 } \ 932 (void)strncpy(&result[idx], what, len); \ 933 idx += len; \ 934 result[idx] = '\0'; \ 935 } 936 937 result = NULL; 938 size = idx = 0; 939 tmp = NULL; 940 for (i = 0; str[i];) { 941 int qchar, loop_again; 942 size_t len, start, j; 943 944 qchar = 0; 945 loop_again = 1; 946 start = j = i; 947 loop: 948 for (; str[j]; j++) { 949 if (str[j] == '\\' && 950 str[j + 1] == history_expansion_char) { 951 (void)strcpy(&str[j], &str[j + 1]); 952 continue; 953 } 954 if (!loop_again) { 955 if (isspace((unsigned char) str[j]) 956 || str[j] == qchar) 957 break; 958 } 959 if (str[j] == history_expansion_char 960 && !strchr(history_no_expand_chars, str[j + 1]) 961 && (!history_inhibit_expansion_function || 962 (*history_inhibit_expansion_function)(str, 963 (int)j) == 0)) 964 break; 965 } 966 967 if (str[j] && loop_again) { 968 i = j; 969 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 970 j++; 971 if (str[j] == history_expansion_char) 972 j++; 973 loop_again = 0; 974 goto loop; 975 } 976 len = i - start; 977 ADD_STRING(&str[start], len, 0); 978 979 if (str[i] == '\0' || str[i] != history_expansion_char) { 980 len = j - i; 981 ADD_STRING(&str[i], len, 0); 982 if (start == 0) 983 ret = 0; 984 else 985 ret = 1; 986 break; 987 } 988 ret = _history_expand_command (str, i, (j - i), &tmp); 989 if (ret > 0 && tmp) { 990 len = strlen(tmp); 991 ADD_STRING(tmp, len, 1); 992 } 993 if (tmp) { 994 el_free(tmp); 995 tmp = NULL; 996 } 997 i = j; 998 } 999 1000 /* ret is 2 for "print only" option */ 1001 if (ret == 2) { 1002 add_history(result); 1003 #ifdef GDB_411_HACK 1004 /* gdb 4.11 has been shipped with readline, where */ 1005 /* history_expand() returned -1 when the line */ 1006 /* should not be executed; in readline 2.1+ */ 1007 /* it should return 2 in such a case */ 1008 ret = -1; 1009 #endif 1010 } 1011 el_free(*output); 1012 *output = result; 1013 1014 return ret; 1015 } 1016 1017 /* 1018 * Return a string consisting of arguments of "str" from "start" to "end". 1019 */ 1020 char * 1021 history_arg_extract(int start, int end, const char *str) 1022 { 1023 size_t i, len, max; 1024 char **arr, *result = NULL; 1025 1026 arr = history_tokenize(str); 1027 if (!arr) 1028 return NULL; 1029 if (arr && *arr == NULL) 1030 goto out; 1031 1032 for (max = 0; arr[max]; max++) 1033 continue; 1034 max--; 1035 1036 if (start == '$') 1037 start = (int)max; 1038 if (end == '$') 1039 end = (int)max; 1040 if (end < 0) 1041 end = (int)max + end + 1; 1042 if (start < 0) 1043 start = end; 1044 1045 if (start < 0 || end < 0 || (size_t)start > max || 1046 (size_t)end > max || start > end) 1047 goto out; 1048 1049 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1050 len += strlen(arr[i]) + 1; 1051 len++; 1052 result = el_malloc(len * sizeof(*result)); 1053 if (result == NULL) 1054 goto out; 1055 1056 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1057 (void)strcpy(result + len, arr[i]); 1058 len += strlen(arr[i]); 1059 if (i < (size_t)end) 1060 result[len++] = ' '; 1061 } 1062 result[len] = '\0'; 1063 1064 out: 1065 for (i = 0; arr[i]; i++) 1066 el_free(arr[i]); 1067 el_free(arr); 1068 1069 return result; 1070 } 1071 1072 /* 1073 * Parse the string into individual tokens, 1074 * similar to how shell would do it. 1075 */ 1076 char ** 1077 history_tokenize(const char *str) 1078 { 1079 int size = 1, idx = 0, i, start; 1080 size_t len; 1081 char **result = NULL, *temp, delim = '\0'; 1082 1083 for (i = 0; str[i];) { 1084 while (isspace((unsigned char) str[i])) 1085 i++; 1086 start = i; 1087 for (; str[i];) { 1088 if (str[i] == '\\') { 1089 if (str[i+1] != '\0') 1090 i++; 1091 } else if (str[i] == delim) 1092 delim = '\0'; 1093 else if (!delim && 1094 (isspace((unsigned char) str[i]) || 1095 strchr("()<>;&|$", str[i]))) 1096 break; 1097 else if (!delim && strchr("'`\"", str[i])) 1098 delim = str[i]; 1099 if (str[i]) 1100 i++; 1101 } 1102 1103 if (idx + 2 >= size) { 1104 char **nresult; 1105 size <<= 1; 1106 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1107 if (nresult == NULL) { 1108 el_free(result); 1109 return NULL; 1110 } 1111 result = nresult; 1112 } 1113 len = (size_t)i - (size_t)start; 1114 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1115 if (temp == NULL) { 1116 for (i = 0; i < idx; i++) 1117 el_free(result[i]); 1118 el_free(result); 1119 return NULL; 1120 } 1121 (void)strncpy(temp, &str[start], len); 1122 temp[len] = '\0'; 1123 result[idx++] = temp; 1124 result[idx] = NULL; 1125 if (str[i]) 1126 i++; 1127 } 1128 return result; 1129 } 1130 1131 1132 /* 1133 * limit size of history record to ``max'' events 1134 */ 1135 void 1136 stifle_history(int max) 1137 { 1138 HistEvent ev; 1139 1140 if (h == NULL || e == NULL) 1141 rl_initialize(); 1142 1143 if (history(h, &ev, H_SETSIZE, max) == 0) 1144 max_input_history = max; 1145 } 1146 1147 1148 /* 1149 * "unlimit" size of history - set the limit to maximum allowed int value 1150 */ 1151 int 1152 unstifle_history(void) 1153 { 1154 HistEvent ev; 1155 int omax; 1156 1157 history(h, &ev, H_SETSIZE, INT_MAX); 1158 omax = max_input_history; 1159 max_input_history = INT_MAX; 1160 return omax; /* some value _must_ be returned */ 1161 } 1162 1163 1164 int 1165 history_is_stifled(void) 1166 { 1167 1168 /* cannot return true answer */ 1169 return max_input_history != INT_MAX; 1170 } 1171 1172 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1173 1174 int 1175 history_truncate_file (const char *filename, int nlines) 1176 { 1177 int ret = 0; 1178 FILE *fp, *tp; 1179 char template[sizeof(_history_tmp_template)]; 1180 char buf[4096]; 1181 int fd; 1182 char *cp; 1183 off_t off; 1184 int count = 0; 1185 ssize_t left = 0; 1186 1187 if (filename == NULL && (filename = _default_history_file()) == NULL) 1188 return errno; 1189 if ((fp = fopen(filename, "r+")) == NULL) 1190 return errno; 1191 strcpy(template, _history_tmp_template); 1192 if ((fd = mkstemp(template)) == -1) { 1193 ret = errno; 1194 goto out1; 1195 } 1196 1197 if ((tp = fdopen(fd, "r+")) == NULL) { 1198 close(fd); 1199 ret = errno; 1200 goto out2; 1201 } 1202 1203 for(;;) { 1204 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1205 if (ferror(fp)) { 1206 ret = errno; 1207 break; 1208 } 1209 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1210 (off_t)-1) { 1211 ret = errno; 1212 break; 1213 } 1214 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1215 if (ferror(fp)) { 1216 ret = errno; 1217 break; 1218 } 1219 if (left == 0) { 1220 count--; 1221 left = sizeof(buf); 1222 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1223 != 1) { 1224 ret = errno; 1225 break; 1226 } 1227 fflush(tp); 1228 break; 1229 } 1230 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1231 ret = errno; 1232 break; 1233 } 1234 count++; 1235 } 1236 if (ret) 1237 goto out3; 1238 cp = buf + left - 1; 1239 if(*cp != '\n') 1240 cp++; 1241 for(;;) { 1242 while (--cp >= buf) { 1243 if (*cp == '\n') { 1244 if (--nlines == 0) { 1245 if (++cp >= buf + sizeof(buf)) { 1246 count++; 1247 cp = buf; 1248 } 1249 break; 1250 } 1251 } 1252 } 1253 if (nlines <= 0 || count == 0) 1254 break; 1255 count--; 1256 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1257 ret = errno; 1258 break; 1259 } 1260 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1261 if (ferror(tp)) { 1262 ret = errno; 1263 break; 1264 } 1265 ret = EAGAIN; 1266 break; 1267 } 1268 cp = buf + sizeof(buf); 1269 } 1270 1271 if (ret || nlines > 0) 1272 goto out3; 1273 1274 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1275 ret = errno; 1276 goto out3; 1277 } 1278 1279 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1280 (off_t)-1) { 1281 ret = errno; 1282 goto out3; 1283 } 1284 1285 for(;;) { 1286 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1287 if (ferror(fp)) 1288 ret = errno; 1289 break; 1290 } 1291 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1292 ret = errno; 1293 break; 1294 } 1295 } 1296 fflush(fp); 1297 if((off = ftello(fp)) > 0) 1298 (void)ftruncate(fileno(fp), off); 1299 out3: 1300 fclose(tp); 1301 out2: 1302 unlink(template); 1303 out1: 1304 fclose(fp); 1305 1306 return ret; 1307 } 1308 1309 1310 /* 1311 * read history from a file given 1312 */ 1313 int 1314 read_history(const char *filename) 1315 { 1316 HistEvent ev; 1317 1318 if (h == NULL || e == NULL) 1319 rl_initialize(); 1320 if (filename == NULL && (filename = _default_history_file()) == NULL) 1321 return errno; 1322 return history(h, &ev, H_LOAD, filename) == -1 ? 1323 (errno ? errno : EINVAL) : 0; 1324 } 1325 1326 1327 /* 1328 * write history to a file given 1329 */ 1330 int 1331 write_history(const char *filename) 1332 { 1333 HistEvent ev; 1334 1335 if (h == NULL || e == NULL) 1336 rl_initialize(); 1337 if (filename == NULL && (filename = _default_history_file()) == NULL) 1338 return errno; 1339 return history(h, &ev, H_SAVE, filename) == -1 ? 1340 (errno ? errno : EINVAL) : 0; 1341 } 1342 1343 1344 /* 1345 * returns history ``num''th event 1346 * 1347 * returned pointer points to static variable 1348 */ 1349 HIST_ENTRY * 1350 history_get(int num) 1351 { 1352 static HIST_ENTRY she; 1353 HistEvent ev; 1354 int curr_num; 1355 1356 if (h == NULL || e == NULL) 1357 rl_initialize(); 1358 1359 /* save current position */ 1360 if (history(h, &ev, H_CURR) != 0) 1361 return NULL; 1362 curr_num = ev.num; 1363 1364 /* start from the oldest */ 1365 if (history(h, &ev, H_LAST) != 0) 1366 return NULL; /* error */ 1367 1368 /* look forwards for event matching specified offset */ 1369 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1370 return NULL; 1371 1372 she.line = ev.str; 1373 1374 /* restore pointer to where it was */ 1375 (void)history(h, &ev, H_SET, curr_num); 1376 1377 return &she; 1378 } 1379 1380 1381 /* 1382 * add the line to history table 1383 */ 1384 int 1385 add_history(const char *line) 1386 { 1387 HistEvent ev; 1388 1389 if (line == NULL) 1390 return 0; 1391 1392 if (h == NULL || e == NULL) 1393 rl_initialize(); 1394 1395 (void)history(h, &ev, H_ENTER, line); 1396 if (history(h, &ev, H_GETSIZE) == 0) 1397 history_length = ev.num; 1398 1399 return !(history_length > 0); /* return 0 if all is okay */ 1400 } 1401 1402 1403 /* 1404 * remove the specified entry from the history list and return it. 1405 */ 1406 HIST_ENTRY * 1407 remove_history(int num) 1408 { 1409 HIST_ENTRY *he; 1410 HistEvent ev; 1411 1412 if (h == NULL || e == NULL) 1413 rl_initialize(); 1414 1415 if ((he = el_malloc(sizeof(*he))) == NULL) 1416 return NULL; 1417 1418 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1419 el_free(he); 1420 return NULL; 1421 } 1422 1423 he->line = ev.str; 1424 if (history(h, &ev, H_GETSIZE) == 0) 1425 history_length = ev.num; 1426 1427 return he; 1428 } 1429 1430 1431 /* 1432 * replace the line and data of the num-th entry 1433 */ 1434 HIST_ENTRY * 1435 replace_history_entry(int num, const char *line, histdata_t data) 1436 { 1437 HIST_ENTRY *he; 1438 HistEvent ev; 1439 int curr_num; 1440 1441 if (h == NULL || e == NULL) 1442 rl_initialize(); 1443 1444 /* save current position */ 1445 if (history(h, &ev, H_CURR) != 0) 1446 return NULL; 1447 curr_num = ev.num; 1448 1449 /* start from the oldest */ 1450 if (history(h, &ev, H_LAST) != 0) 1451 return NULL; /* error */ 1452 1453 if ((he = el_malloc(sizeof(*he))) == NULL) 1454 return NULL; 1455 1456 /* look forwards for event matching specified offset */ 1457 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1458 goto out; 1459 1460 he->line = strdup(ev.str); 1461 if (he->line == NULL) 1462 goto out; 1463 1464 if (history(h, &ev, H_REPLACE, line, data)) 1465 goto out; 1466 1467 /* restore pointer to where it was */ 1468 if (history(h, &ev, H_SET, curr_num)) 1469 goto out; 1470 1471 return he; 1472 out: 1473 el_free(he); 1474 return NULL; 1475 } 1476 1477 /* 1478 * clear the history list - delete all entries 1479 */ 1480 void 1481 clear_history(void) 1482 { 1483 HistEvent ev; 1484 1485 (void)history(h, &ev, H_CLEAR); 1486 history_length = 0; 1487 } 1488 1489 1490 /* 1491 * returns offset of the current history event 1492 */ 1493 int 1494 where_history(void) 1495 { 1496 HistEvent ev; 1497 int curr_num, off; 1498 1499 if (history(h, &ev, H_CURR) != 0) 1500 return 0; 1501 curr_num = ev.num; 1502 1503 (void)history(h, &ev, H_FIRST); 1504 off = 1; 1505 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1506 off++; 1507 1508 return off; 1509 } 1510 1511 1512 /* 1513 * returns current history event or NULL if there is no such event 1514 */ 1515 HIST_ENTRY * 1516 current_history(void) 1517 { 1518 1519 return _move_history(H_CURR); 1520 } 1521 1522 1523 /* 1524 * returns total number of bytes history events' data are using 1525 */ 1526 int 1527 history_total_bytes(void) 1528 { 1529 HistEvent ev; 1530 int curr_num; 1531 size_t size; 1532 1533 if (history(h, &ev, H_CURR) != 0) 1534 return -1; 1535 curr_num = ev.num; 1536 1537 (void)history(h, &ev, H_FIRST); 1538 size = 0; 1539 do 1540 size += strlen(ev.str) * sizeof(*ev.str); 1541 while (history(h, &ev, H_NEXT) == 0); 1542 1543 /* get to the same position as before */ 1544 history(h, &ev, H_PREV_EVENT, curr_num); 1545 1546 return (int)size; 1547 } 1548 1549 1550 /* 1551 * sets the position in the history list to ``pos'' 1552 */ 1553 int 1554 history_set_pos(int pos) 1555 { 1556 HistEvent ev; 1557 int curr_num; 1558 1559 if (pos >= history_length || pos < 0) 1560 return -1; 1561 1562 (void)history(h, &ev, H_CURR); 1563 curr_num = ev.num; 1564 1565 /* 1566 * use H_DELDATA to set to nth history (without delete) by passing 1567 * (void **)-1 1568 */ 1569 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1570 (void)history(h, &ev, H_SET, curr_num); 1571 return -1; 1572 } 1573 return 0; 1574 } 1575 1576 1577 /* 1578 * returns previous event in history and shifts pointer accordingly 1579 */ 1580 HIST_ENTRY * 1581 previous_history(void) 1582 { 1583 1584 return _move_history(H_PREV); 1585 } 1586 1587 1588 /* 1589 * returns next event in history and shifts pointer accordingly 1590 */ 1591 HIST_ENTRY * 1592 next_history(void) 1593 { 1594 1595 return _move_history(H_NEXT); 1596 } 1597 1598 1599 /* 1600 * searches for first history event containing the str 1601 */ 1602 int 1603 history_search(const char *str, int direction) 1604 { 1605 HistEvent ev; 1606 const char *strp; 1607 int curr_num; 1608 1609 if (history(h, &ev, H_CURR) != 0) 1610 return -1; 1611 curr_num = ev.num; 1612 1613 for (;;) { 1614 if ((strp = strstr(ev.str, str)) != NULL) 1615 return (int)(strp - ev.str); 1616 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1617 break; 1618 } 1619 (void)history(h, &ev, H_SET, curr_num); 1620 return -1; 1621 } 1622 1623 1624 /* 1625 * searches for first history event beginning with str 1626 */ 1627 int 1628 history_search_prefix(const char *str, int direction) 1629 { 1630 HistEvent ev; 1631 1632 return (history(h, &ev, direction < 0 ? 1633 H_PREV_STR : H_NEXT_STR, str)); 1634 } 1635 1636 1637 /* 1638 * search for event in history containing str, starting at offset 1639 * abs(pos); continue backward, if pos<0, forward otherwise 1640 */ 1641 /* ARGSUSED */ 1642 int 1643 history_search_pos(const char *str, 1644 int direction __attribute__((__unused__)), int pos) 1645 { 1646 HistEvent ev; 1647 int curr_num, off; 1648 1649 off = (pos > 0) ? pos : -pos; 1650 pos = (pos > 0) ? 1 : -1; 1651 1652 if (history(h, &ev, H_CURR) != 0) 1653 return -1; 1654 curr_num = ev.num; 1655 1656 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1657 return -1; 1658 1659 for (;;) { 1660 if (strstr(ev.str, str)) 1661 return off; 1662 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1663 break; 1664 } 1665 1666 /* set "current" pointer back to previous state */ 1667 (void)history(h, &ev, 1668 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1669 1670 return -1; 1671 } 1672 1673 1674 /********************************/ 1675 /* completion functions */ 1676 1677 char * 1678 tilde_expand(char *name) 1679 { 1680 return fn_tilde_expand(name); 1681 } 1682 1683 char * 1684 filename_completion_function(const char *name, int state) 1685 { 1686 return fn_filename_completion_function(name, state); 1687 } 1688 1689 /* 1690 * a completion generator for usernames; returns _first_ username 1691 * which starts with supplied text 1692 * text contains a partial username preceded by random character 1693 * (usually '~'); state resets search from start (??? should we do that anyway) 1694 * it's callers responsibility to free returned value 1695 */ 1696 char * 1697 username_completion_function(const char *text, int state) 1698 { 1699 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1700 struct passwd pwres; 1701 char pwbuf[1024]; 1702 #endif 1703 struct passwd *pass = NULL; 1704 1705 if (text[0] == '\0') 1706 return NULL; 1707 1708 if (*text == '~') 1709 text++; 1710 1711 if (state == 0) 1712 setpwent(); 1713 1714 while ( 1715 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1716 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1717 #else 1718 (pass = getpwent()) != NULL 1719 #endif 1720 && text[0] == pass->pw_name[0] 1721 && strcmp(text, pass->pw_name) == 0) 1722 continue; 1723 1724 if (pass == NULL) { 1725 endpwent(); 1726 return NULL; 1727 } 1728 return strdup(pass->pw_name); 1729 } 1730 1731 1732 /* 1733 * el-compatible wrapper to send TSTP on ^Z 1734 */ 1735 /* ARGSUSED */ 1736 static unsigned char 1737 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1738 { 1739 (void)kill(0, SIGTSTP); 1740 return CC_NORM; 1741 } 1742 1743 /* 1744 * Display list of strings in columnar format on readline's output stream. 1745 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1746 * 'max' is maximum length of string in 'matches'. 1747 */ 1748 void 1749 rl_display_match_list(char **matches, int len, int max) 1750 { 1751 1752 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1753 } 1754 1755 static const char * 1756 /*ARGSUSED*/ 1757 _rl_completion_append_character_function(const char *dummy 1758 __attribute__((__unused__))) 1759 { 1760 static char buf[2]; 1761 buf[0] = (char)rl_completion_append_character; 1762 buf[1] = '\0'; 1763 return buf; 1764 } 1765 1766 1767 /* 1768 * complete word at current point 1769 */ 1770 /* ARGSUSED */ 1771 int 1772 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1773 { 1774 #ifdef WIDECHAR 1775 static ct_buffer_t wbreak_conv, sprefix_conv; 1776 #endif 1777 char *breakchars; 1778 1779 if (h == NULL || e == NULL) 1780 rl_initialize(); 1781 1782 if (rl_inhibit_completion) { 1783 char arr[2]; 1784 arr[0] = (char)invoking_key; 1785 arr[1] = '\0'; 1786 el_insertstr(e, arr); 1787 return CC_REFRESH; 1788 } 1789 1790 if (rl_completion_word_break_hook != NULL) 1791 breakchars = (*rl_completion_word_break_hook)(); 1792 else 1793 breakchars = rl_basic_word_break_characters; 1794 1795 /* Just look at how many global variables modify this operation! */ 1796 return fn_complete(e, 1797 (CPFunction *)rl_completion_entry_function, 1798 rl_attempted_completion_function, 1799 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1800 ct_decode_string(breakchars, &sprefix_conv), 1801 _rl_completion_append_character_function, 1802 (size_t)rl_completion_query_items, 1803 &rl_completion_type, &rl_attempted_completion_over, 1804 &rl_point, &rl_end); 1805 1806 1807 } 1808 1809 1810 /* ARGSUSED */ 1811 static unsigned char 1812 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1813 { 1814 return (unsigned char)rl_complete(0, ch); 1815 } 1816 1817 /* 1818 * misc other functions 1819 */ 1820 1821 /* 1822 * bind key c to readline-type function func 1823 */ 1824 int 1825 rl_bind_key(int c, rl_command_func_t *func) 1826 { 1827 int retval = -1; 1828 1829 if (h == NULL || e == NULL) 1830 rl_initialize(); 1831 1832 if (func == rl_insert) { 1833 /* XXX notice there is no range checking of ``c'' */ 1834 e->el_map.key[c] = ED_INSERT; 1835 retval = 0; 1836 } 1837 return retval; 1838 } 1839 1840 1841 /* 1842 * read one key from input - handles chars pushed back 1843 * to input stream also 1844 */ 1845 int 1846 rl_read_key(void) 1847 { 1848 char fooarr[2 * sizeof(int)]; 1849 1850 if (e == NULL || h == NULL) 1851 rl_initialize(); 1852 1853 return el_getc(e, fooarr); 1854 } 1855 1856 1857 /* 1858 * reset the terminal 1859 */ 1860 /* ARGSUSED */ 1861 void 1862 rl_reset_terminal(const char *p __attribute__((__unused__))) 1863 { 1864 1865 if (h == NULL || e == NULL) 1866 rl_initialize(); 1867 el_reset(e); 1868 } 1869 1870 1871 /* 1872 * insert character ``c'' back into input stream, ``count'' times 1873 */ 1874 int 1875 rl_insert(int count, int c) 1876 { 1877 char arr[2]; 1878 1879 if (h == NULL || e == NULL) 1880 rl_initialize(); 1881 1882 /* XXX - int -> char conversion can lose on multichars */ 1883 arr[0] = (char)c; 1884 arr[1] = '\0'; 1885 1886 for (; count > 0; count--) 1887 el_push(e, arr); 1888 1889 return 0; 1890 } 1891 1892 int 1893 rl_insert_text(const char *text) 1894 { 1895 if (!text || *text == 0) 1896 return 0; 1897 1898 if (h == NULL || e == NULL) 1899 rl_initialize(); 1900 1901 if (el_insertstr(e, text) < 0) 1902 return 0; 1903 return (int)strlen(text); 1904 } 1905 1906 /*ARGSUSED*/ 1907 int 1908 rl_newline(int count __attribute__((__unused__)), 1909 int c __attribute__((__unused__))) 1910 { 1911 /* 1912 * Readline-4.0 appears to ignore the args. 1913 */ 1914 return rl_insert(1, '\n'); 1915 } 1916 1917 /*ARGSUSED*/ 1918 static unsigned char 1919 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1920 { 1921 if (map[c] == NULL) 1922 return CC_ERROR; 1923 1924 _rl_update_pos(); 1925 1926 (*map[c])(NULL, c); 1927 1928 /* If rl_done was set by the above call, deal with it here */ 1929 if (rl_done) 1930 return CC_EOF; 1931 1932 return CC_NORM; 1933 } 1934 1935 int 1936 rl_add_defun(const char *name, Function *fun, int c) 1937 { 1938 char dest[8]; 1939 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1940 return -1; 1941 map[(unsigned char)c] = fun; 1942 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1943 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1944 el_set(e, EL_BIND, dest, name, NULL); 1945 return 0; 1946 } 1947 1948 void 1949 rl_callback_read_char(void) 1950 { 1951 int count = 0, done = 0; 1952 const char *buf = el_gets(e, &count); 1953 char *wbuf; 1954 1955 if (buf == NULL || count-- <= 0) 1956 return; 1957 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1958 done = 1; 1959 if (buf[count] == '\n' || buf[count] == '\r') 1960 done = 2; 1961 1962 if (done && rl_linefunc != NULL) { 1963 el_set(e, EL_UNBUFFERED, 0); 1964 if (done == 2) { 1965 if ((wbuf = strdup(buf)) != NULL) 1966 wbuf[count] = '\0'; 1967 } else 1968 wbuf = NULL; 1969 (*(void (*)(const char *))rl_linefunc)(wbuf); 1970 //el_set(e, EL_UNBUFFERED, 1); 1971 } 1972 } 1973 1974 void 1975 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1976 { 1977 if (e == NULL) { 1978 rl_initialize(); 1979 } 1980 (void)rl_set_prompt(prompt); 1981 rl_linefunc = linefunc; 1982 el_set(e, EL_UNBUFFERED, 1); 1983 } 1984 1985 void 1986 rl_callback_handler_remove(void) 1987 { 1988 el_set(e, EL_UNBUFFERED, 0); 1989 rl_linefunc = NULL; 1990 } 1991 1992 void 1993 rl_redisplay(void) 1994 { 1995 char a[2]; 1996 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 1997 a[1] = '\0'; 1998 el_push(e, a); 1999 } 2000 2001 int 2002 rl_get_previous_history(int count, int key) 2003 { 2004 char a[2]; 2005 a[0] = (char)key; 2006 a[1] = '\0'; 2007 while (count--) 2008 el_push(e, a); 2009 return 0; 2010 } 2011 2012 void 2013 /*ARGSUSED*/ 2014 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2015 { 2016 el_set(e, EL_PREP_TERM, 1); 2017 } 2018 2019 void 2020 rl_deprep_terminal(void) 2021 { 2022 el_set(e, EL_PREP_TERM, 0); 2023 } 2024 2025 int 2026 rl_read_init_file(const char *s) 2027 { 2028 return el_source(e, s); 2029 } 2030 2031 int 2032 rl_parse_and_bind(const char *line) 2033 { 2034 const char **argv; 2035 int argc; 2036 Tokenizer *tok; 2037 2038 tok = tok_init(NULL); 2039 tok_str(tok, line, &argc, &argv); 2040 argc = el_parse(e, argc, argv); 2041 tok_end(tok); 2042 return argc ? 1 : 0; 2043 } 2044 2045 int 2046 rl_variable_bind(const char *var, const char *value) 2047 { 2048 /* 2049 * The proper return value is undocument, but this is what the 2050 * readline source seems to do. 2051 */ 2052 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2053 } 2054 2055 void 2056 rl_stuff_char(int c) 2057 { 2058 char buf[2]; 2059 2060 buf[0] = (char)c; 2061 buf[1] = '\0'; 2062 el_insertstr(e, buf); 2063 } 2064 2065 static int 2066 _rl_event_read_char(EditLine *el, char *cp) 2067 { 2068 int n; 2069 ssize_t num_read = 0; 2070 2071 *cp = '\0'; 2072 while (rl_event_hook) { 2073 2074 (*rl_event_hook)(); 2075 2076 #if defined(FIONREAD) 2077 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2078 return -1; 2079 if (n) 2080 num_read = read(el->el_infd, cp, (size_t)1); 2081 else 2082 num_read = 0; 2083 #elif defined(F_SETFL) && defined(O_NDELAY) 2084 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2085 return -1; 2086 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2087 return -1; 2088 num_read = read(el->el_infd, cp, 1); 2089 if (fcntl(el->el_infd, F_SETFL, n)) 2090 return -1; 2091 #else 2092 /* not non-blocking, but what you gonna do? */ 2093 num_read = read(el->el_infd, cp, 1); 2094 return -1; 2095 #endif 2096 2097 if (num_read < 0 && errno == EAGAIN) 2098 continue; 2099 if (num_read == 0) 2100 continue; 2101 break; 2102 } 2103 if (!rl_event_hook) 2104 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2105 return (int)num_read; 2106 } 2107 2108 static void 2109 _rl_update_pos(void) 2110 { 2111 const LineInfo *li = el_line(e); 2112 2113 rl_point = (int)(li->cursor - li->buffer); 2114 rl_end = (int)(li->lastchar - li->buffer); 2115 } 2116 2117 void 2118 rl_get_screen_size(int *rows, int *cols) 2119 { 2120 if (rows) 2121 el_get(e, EL_GETTC, "li", rows, (void *)0); 2122 if (cols) 2123 el_get(e, EL_GETTC, "co", cols, (void *)0); 2124 } 2125 2126 void 2127 rl_set_screen_size(int rows, int cols) 2128 { 2129 char buf[64]; 2130 (void)snprintf(buf, sizeof(buf), "%d", rows); 2131 el_set(e, EL_SETTC, "li", buf, NULL); 2132 (void)snprintf(buf, sizeof(buf), "%d", cols); 2133 el_set(e, EL_SETTC, "co", buf, NULL); 2134 } 2135 2136 char ** 2137 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2138 { 2139 size_t len, max, i, j, min; 2140 char **list, *match, *a, *b; 2141 2142 len = 1; 2143 max = 10; 2144 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2145 return NULL; 2146 2147 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2148 list[len++] = match; 2149 if (len == max) { 2150 char **nl; 2151 max += 10; 2152 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2153 goto out; 2154 list = nl; 2155 } 2156 } 2157 if (len == 1) 2158 goto out; 2159 list[len] = NULL; 2160 if (len == 2) { 2161 if ((list[0] = strdup(list[1])) == NULL) 2162 goto out; 2163 return list; 2164 } 2165 qsort(&list[1], len - 1, sizeof(*list), 2166 (int (*)(const void *, const void *)) strcmp); 2167 min = SIZE_T_MAX; 2168 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2169 b = list[i + 1]; 2170 for (j = 0; a[j] && a[j] == b[j]; j++) 2171 continue; 2172 if (min > j) 2173 min = j; 2174 } 2175 if (min == 0 && *str) { 2176 if ((list[0] = strdup(str)) == NULL) 2177 goto out; 2178 } else { 2179 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2180 goto out; 2181 (void)memcpy(list[0], list[1], min); 2182 list[0][min] = '\0'; 2183 } 2184 return list; 2185 2186 out: 2187 el_free(list); 2188 return NULL; 2189 } 2190 2191 char * 2192 rl_filename_completion_function (const char *text, int state) 2193 { 2194 return fn_filename_completion_function(text, state); 2195 } 2196 2197 void 2198 rl_forced_update_display(void) 2199 { 2200 el_set(e, EL_REFRESH); 2201 } 2202 2203 int 2204 _rl_abort_internal(void) 2205 { 2206 el_beep(e); 2207 longjmp(topbuf, 1); 2208 /*NOTREACHED*/ 2209 } 2210 2211 int 2212 _rl_qsort_string_compare(char **s1, char **s2) 2213 { 2214 return strcoll(*s1, *s2); 2215 } 2216 2217 HISTORY_STATE * 2218 history_get_history_state(void) 2219 { 2220 HISTORY_STATE *hs; 2221 2222 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2223 return NULL; 2224 hs->length = history_length; 2225 return hs; 2226 } 2227 2228 int 2229 /*ARGSUSED*/ 2230 rl_kill_text(int from __attribute__((__unused__)), 2231 int to __attribute__((__unused__))) 2232 { 2233 return 0; 2234 } 2235 2236 Keymap 2237 rl_make_bare_keymap(void) 2238 { 2239 return NULL; 2240 } 2241 2242 Keymap 2243 rl_get_keymap(void) 2244 { 2245 return NULL; 2246 } 2247 2248 void 2249 /*ARGSUSED*/ 2250 rl_set_keymap(Keymap k __attribute__((__unused__))) 2251 { 2252 } 2253 2254 int 2255 /*ARGSUSED*/ 2256 rl_generic_bind(int type __attribute__((__unused__)), 2257 const char * keyseq __attribute__((__unused__)), 2258 const char * data __attribute__((__unused__)), 2259 Keymap k __attribute__((__unused__))) 2260 { 2261 return 0; 2262 } 2263 2264 int 2265 /*ARGSUSED*/ 2266 rl_bind_key_in_map(int key __attribute__((__unused__)), 2267 rl_command_func_t *fun __attribute__((__unused__)), 2268 Keymap k __attribute__((__unused__))) 2269 { 2270 return 0; 2271 } 2272 2273 /* unsupported, but needed by python */ 2274 void 2275 rl_cleanup_after_signal(void) 2276 { 2277 } 2278 2279 int 2280 rl_on_new_line(void) 2281 { 2282 return 0; 2283 } 2284 2285 void 2286 rl_free_line_state(void) 2287 { 2288 } 2289