1 /* $NetBSD: readline.c,v 1.107 2013/01/13 15:46:57 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 1.107 2013/01/13 15:46:57 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 int history_base = 1; /* probably never subject to change */ 89 int history_length = 0; 90 int max_input_history = 0; 91 char history_expansion_char = '!'; 92 char history_subst_char = '^'; 93 char *history_no_expand_chars = expand_chars; 94 Function *history_inhibit_expansion_function = NULL; 95 char *history_arg_extract(int start, int end, const char *str); 96 97 int rl_inhibit_completion = 0; 98 int rl_attempted_completion_over = 0; 99 char *rl_basic_word_break_characters = break_chars; 100 char *rl_completer_word_break_characters = NULL; 101 char *rl_completer_quote_characters = NULL; 102 Function *rl_completion_entry_function = NULL; 103 char *(*rl_completion_word_break_hook)(void) = NULL; 104 CPPFunction *rl_attempted_completion_function = NULL; 105 Function *rl_pre_input_hook = NULL; 106 Function *rl_startup1_hook = NULL; 107 int (*rl_getc_function)(FILE *) = NULL; 108 char *rl_terminal_name = NULL; 109 int rl_already_prompted = 0; 110 int rl_filename_completion_desired = 0; 111 int rl_ignore_completion_duplicates = 0; 112 int rl_catch_signals = 1; 113 int readline_echoing_p = 1; 114 int _rl_print_completions_horizontally = 0; 115 VFunction *rl_redisplay_function = NULL; 116 Function *rl_startup_hook = NULL; 117 VFunction *rl_completion_display_matches_hook = NULL; 118 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 119 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 120 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 121 122 /* 123 * The current prompt string. 124 */ 125 char *rl_prompt = NULL; 126 /* 127 * This is set to character indicating type of completion being done by 128 * rl_complete_internal(); this is available for application completion 129 * functions. 130 */ 131 int rl_completion_type = 0; 132 133 /* 134 * If more than this number of items results from query for possible 135 * completions, we ask user if they are sure to really display the list. 136 */ 137 int rl_completion_query_items = 100; 138 139 /* 140 * List of characters which are word break characters, but should be left 141 * in the parsed text when it is passed to the completion function. 142 * Shell uses this to help determine what kind of completing to do. 143 */ 144 char *rl_special_prefixes = NULL; 145 146 /* 147 * This is the character appended to the completed words if at the end of 148 * the line. Default is ' ' (a space). 149 */ 150 int rl_completion_append_character = ' '; 151 152 /* stuff below is used internally by libedit for readline emulation */ 153 154 static History *h = NULL; 155 static EditLine *e = NULL; 156 static Function *map[256]; 157 static jmp_buf topbuf; 158 159 /* internal functions */ 160 static unsigned char _el_rl_complete(EditLine *, int); 161 static unsigned char _el_rl_tstp(EditLine *, int); 162 static char *_get_prompt(EditLine *); 163 static int _getc_function(EditLine *, char *); 164 static HIST_ENTRY *_move_history(int); 165 static int _history_expand_command(const char *, size_t, size_t, 166 char **); 167 static char *_rl_compat_sub(const char *, const char *, 168 const char *, int); 169 static int _rl_event_read_char(EditLine *, char *); 170 static void _rl_update_pos(void); 171 172 173 /* ARGSUSED */ 174 static char * 175 _get_prompt(EditLine *el __attribute__((__unused__))) 176 { 177 rl_already_prompted = 1; 178 return rl_prompt; 179 } 180 181 182 /* 183 * generic function for moving around history 184 */ 185 static HIST_ENTRY * 186 _move_history(int op) 187 { 188 HistEvent ev; 189 static HIST_ENTRY rl_he; 190 191 if (history(h, &ev, op) != 0) 192 return NULL; 193 194 rl_he.line = ev.str; 195 rl_he.data = NULL; 196 197 return &rl_he; 198 } 199 200 201 /* 202 * read one key from user defined input function 203 */ 204 static int 205 /*ARGSUSED*/ 206 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 207 { 208 int i; 209 210 i = (*rl_getc_function)(NULL); 211 if (i == -1) 212 return 0; 213 *c = (char)i; 214 return 1; 215 } 216 217 static void 218 _resize_fun(EditLine *el, void *a) 219 { 220 const LineInfo *li; 221 char **ap = a; 222 223 li = el_line(el); 224 /* a cheesy way to get rid of const cast. */ 225 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 226 } 227 228 static const char * 229 _default_history_file(void) 230 { 231 struct passwd *p; 232 static char path[PATH_MAX]; 233 234 if (*path) 235 return path; 236 if ((p = getpwuid(getuid())) == NULL) 237 return NULL; 238 (void)snprintf(path, sizeof(path), "%s/.history", p->pw_dir); 239 return path; 240 } 241 242 /* 243 * READLINE compatibility stuff 244 */ 245 246 /* 247 * Set the prompt 248 */ 249 int 250 rl_set_prompt(const char *prompt) 251 { 252 char *p; 253 254 if (!prompt) 255 prompt = ""; 256 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 257 return 0; 258 if (rl_prompt) 259 el_free(rl_prompt); 260 rl_prompt = strdup(prompt); 261 if (rl_prompt == NULL) 262 return -1; 263 264 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 265 *p = RL_PROMPT_START_IGNORE; 266 267 return 0; 268 } 269 270 /* 271 * initialize rl compat stuff 272 */ 273 int 274 rl_initialize(void) 275 { 276 HistEvent ev; 277 int editmode = 1; 278 struct termios t; 279 280 if (e != NULL) 281 el_end(e); 282 if (h != NULL) 283 history_end(h); 284 285 if (!rl_instream) 286 rl_instream = stdin; 287 if (!rl_outstream) 288 rl_outstream = stdout; 289 290 /* 291 * See if we don't really want to run the editor 292 */ 293 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 294 editmode = 0; 295 296 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 297 298 if (!editmode) 299 el_set(e, EL_EDITMODE, 0); 300 301 h = history_init(); 302 if (!e || !h) 303 return -1; 304 305 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 306 history_length = 0; 307 max_input_history = INT_MAX; 308 el_set(e, EL_HIST, history, h); 309 310 /* Setup resize function */ 311 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 312 313 /* setup getc function if valid */ 314 if (rl_getc_function) 315 el_set(e, EL_GETCFN, _getc_function); 316 317 /* for proper prompt printing in readline() */ 318 if (rl_set_prompt("") == -1) { 319 history_end(h); 320 el_end(e); 321 return -1; 322 } 323 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 324 el_set(e, EL_SIGNAL, rl_catch_signals); 325 326 /* set default mode to "emacs"-style and read setting afterwards */ 327 /* so this can be overriden */ 328 el_set(e, EL_EDITOR, "emacs"); 329 if (rl_terminal_name != NULL) 330 el_set(e, EL_TERMINAL, rl_terminal_name); 331 else 332 el_get(e, EL_TERMINAL, &rl_terminal_name); 333 334 /* 335 * Word completion - this has to go AFTER rebinding keys 336 * to emacs-style. 337 */ 338 el_set(e, EL_ADDFN, "rl_complete", 339 "ReadLine compatible completion function", 340 _el_rl_complete); 341 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 342 343 /* 344 * Send TSTP when ^Z is pressed. 345 */ 346 el_set(e, EL_ADDFN, "rl_tstp", 347 "ReadLine compatible suspend function", 348 _el_rl_tstp); 349 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 350 351 /* read settings from configuration file */ 352 el_source(e, NULL); 353 354 /* 355 * Unfortunately, some applications really do use rl_point 356 * and rl_line_buffer directly. 357 */ 358 _resize_fun(e, &rl_line_buffer); 359 _rl_update_pos(); 360 361 if (rl_startup_hook) 362 (*rl_startup_hook)(NULL, 0); 363 364 return 0; 365 } 366 367 368 /* 369 * read one line from input stream and return it, chomping 370 * trailing newline (if there is any) 371 */ 372 char * 373 readline(const char *p) 374 { 375 HistEvent ev; 376 const char * volatile prompt = p; 377 int count; 378 const char *ret; 379 char *buf; 380 static int used_event_hook; 381 382 if (e == NULL || h == NULL) 383 rl_initialize(); 384 385 rl_done = 0; 386 387 (void)setjmp(topbuf); 388 389 /* update prompt accordingly to what has been passed */ 390 if (rl_set_prompt(prompt) == -1) 391 return NULL; 392 393 if (rl_pre_input_hook) 394 (*rl_pre_input_hook)(NULL, 0); 395 396 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 397 el_set(e, EL_GETCFN, _rl_event_read_char); 398 used_event_hook = 1; 399 } 400 401 if (!rl_event_hook && used_event_hook) { 402 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 403 used_event_hook = 0; 404 } 405 406 rl_already_prompted = 0; 407 408 /* get one line from input stream */ 409 ret = el_gets(e, &count); 410 411 if (ret && count > 0) { 412 int lastidx; 413 414 buf = strdup(ret); 415 if (buf == NULL) 416 return NULL; 417 lastidx = count - 1; 418 if (buf[lastidx] == '\n') 419 buf[lastidx] = '\0'; 420 } else 421 buf = NULL; 422 423 history(h, &ev, H_GETSIZE); 424 history_length = ev.num; 425 426 return buf; 427 } 428 429 /* 430 * history functions 431 */ 432 433 /* 434 * is normally called before application starts to use 435 * history expansion functions 436 */ 437 void 438 using_history(void) 439 { 440 if (h == NULL || e == NULL) 441 rl_initialize(); 442 } 443 444 445 /* 446 * substitute ``what'' with ``with'', returning resulting string; if 447 * globally == 1, substitutes all occurrences of what, otherwise only the 448 * first one 449 */ 450 static char * 451 _rl_compat_sub(const char *str, const char *what, const char *with, 452 int globally) 453 { 454 const char *s; 455 char *r, *result; 456 size_t len, with_len, what_len; 457 458 len = strlen(str); 459 with_len = strlen(with); 460 what_len = strlen(what); 461 462 /* calculate length we need for result */ 463 s = str; 464 while (*s) { 465 if (*s == *what && !strncmp(s, what, what_len)) { 466 len += with_len - what_len; 467 if (!globally) 468 break; 469 s += what_len; 470 } else 471 s++; 472 } 473 r = result = el_malloc((len + 1) * sizeof(*r)); 474 if (result == NULL) 475 return NULL; 476 s = str; 477 while (*s) { 478 if (*s == *what && !strncmp(s, what, what_len)) { 479 (void)strncpy(r, with, with_len); 480 r += with_len; 481 s += what_len; 482 if (!globally) { 483 (void)strcpy(r, s); 484 return result; 485 } 486 } else 487 *r++ = *s++; 488 } 489 *r = '\0'; 490 return result; 491 } 492 493 static char *last_search_pat; /* last !?pat[?] search pattern */ 494 static char *last_search_match; /* last !?pat[?] that matched */ 495 496 const char * 497 get_history_event(const char *cmd, int *cindex, int qchar) 498 { 499 int idx, sign, sub, num, begin, ret; 500 size_t len; 501 char *pat; 502 const char *rptr; 503 HistEvent ev; 504 505 idx = *cindex; 506 if (cmd[idx++] != history_expansion_char) 507 return NULL; 508 509 /* find out which event to take */ 510 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 511 if (history(h, &ev, H_FIRST) != 0) 512 return NULL; 513 *cindex = cmd[idx]? (idx + 1):idx; 514 return ev.str; 515 } 516 sign = 0; 517 if (cmd[idx] == '-') { 518 sign = 1; 519 idx++; 520 } 521 522 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 523 HIST_ENTRY *rl_he; 524 525 num = 0; 526 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 527 num = num * 10 + cmd[idx] - '0'; 528 idx++; 529 } 530 if (sign) 531 num = history_length - num + 1; 532 533 if (!(rl_he = history_get(num))) 534 return NULL; 535 536 *cindex = idx; 537 return rl_he->line; 538 } 539 sub = 0; 540 if (cmd[idx] == '?') { 541 sub = 1; 542 idx++; 543 } 544 begin = idx; 545 while (cmd[idx]) { 546 if (cmd[idx] == '\n') 547 break; 548 if (sub && cmd[idx] == '?') 549 break; 550 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 551 || cmd[idx] == '\t' || cmd[idx] == qchar)) 552 break; 553 idx++; 554 } 555 len = (size_t)idx - (size_t)begin; 556 if (sub && cmd[idx] == '?') 557 idx++; 558 if (sub && len == 0 && last_search_pat && *last_search_pat) 559 pat = last_search_pat; 560 else if (len == 0) 561 return NULL; 562 else { 563 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 564 return NULL; 565 (void)strncpy(pat, cmd + begin, len); 566 pat[len] = '\0'; 567 } 568 569 if (history(h, &ev, H_CURR) != 0) { 570 if (pat != last_search_pat) 571 el_free(pat); 572 return NULL; 573 } 574 num = ev.num; 575 576 if (sub) { 577 if (pat != last_search_pat) { 578 if (last_search_pat) 579 el_free(last_search_pat); 580 last_search_pat = pat; 581 } 582 ret = history_search(pat, -1); 583 } else 584 ret = history_search_prefix(pat, -1); 585 586 if (ret == -1) { 587 /* restore to end of list on failed search */ 588 history(h, &ev, H_FIRST); 589 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 590 if (pat != last_search_pat) 591 el_free(pat); 592 return NULL; 593 } 594 595 if (sub && len) { 596 if (last_search_match && last_search_match != pat) 597 el_free(last_search_match); 598 last_search_match = pat; 599 } 600 601 if (pat != last_search_pat) 602 el_free(pat); 603 604 if (history(h, &ev, H_CURR) != 0) 605 return NULL; 606 *cindex = idx; 607 rptr = ev.str; 608 609 /* roll back to original position */ 610 (void)history(h, &ev, H_SET, num); 611 612 return rptr; 613 } 614 615 /* 616 * the real function doing history expansion - takes as argument command 617 * to do and data upon which the command should be executed 618 * does expansion the way I've understood readline documentation 619 * 620 * returns 0 if data was not modified, 1 if it was and 2 if the string 621 * should be only printed and not executed; in case of error, 622 * returns -1 and *result points to NULL 623 * it's callers responsibility to free() string returned in *result 624 */ 625 static int 626 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 627 char **result) 628 { 629 char *tmp, *search = NULL, *aptr; 630 const char *ptr, *cmd; 631 static char *from = NULL, *to = NULL; 632 int start, end, idx, has_mods = 0; 633 int p_on = 0, g_on = 0; 634 635 *result = NULL; 636 aptr = NULL; 637 ptr = NULL; 638 639 /* First get event specifier */ 640 idx = 0; 641 642 if (strchr(":^*$", command[offs + 1])) { 643 char str[4]; 644 /* 645 * "!:" is shorthand for "!!:". 646 * "!^", "!*" and "!$" are shorthand for 647 * "!!:^", "!!:*" and "!!:$" respectively. 648 */ 649 str[0] = str[1] = '!'; 650 str[2] = '0'; 651 ptr = get_history_event(str, &idx, 0); 652 idx = (command[offs + 1] == ':')? 1:0; 653 has_mods = 1; 654 } else { 655 if (command[offs + 1] == '#') { 656 /* use command so far */ 657 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 658 == NULL) 659 return -1; 660 (void)strncpy(aptr, command, offs); 661 aptr[offs] = '\0'; 662 idx = 1; 663 } else { 664 int qchar; 665 666 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 667 ptr = get_history_event(command + offs, &idx, qchar); 668 } 669 has_mods = command[offs + (size_t)idx] == ':'; 670 } 671 672 if (ptr == NULL && aptr == NULL) 673 return -1; 674 675 if (!has_mods) { 676 *result = strdup(aptr ? aptr : ptr); 677 if (aptr) 678 el_free(aptr); 679 if (*result == NULL) 680 return -1; 681 return 1; 682 } 683 684 cmd = command + offs + idx + 1; 685 686 /* Now parse any word designators */ 687 688 if (*cmd == '%') /* last word matched by ?pat? */ 689 tmp = strdup(last_search_match? last_search_match:""); 690 else if (strchr("^*$-0123456789", *cmd)) { 691 start = end = -1; 692 if (*cmd == '^') 693 start = end = 1, cmd++; 694 else if (*cmd == '$') 695 start = -1, cmd++; 696 else if (*cmd == '*') 697 start = 1, cmd++; 698 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 699 start = 0; 700 while (*cmd && '0' <= *cmd && *cmd <= '9') 701 start = start * 10 + *cmd++ - '0'; 702 703 if (*cmd == '-') { 704 if (isdigit((unsigned char) cmd[1])) { 705 cmd++; 706 end = 0; 707 while (*cmd && '0' <= *cmd && *cmd <= '9') 708 end = end * 10 + *cmd++ - '0'; 709 } else if (cmd[1] == '$') { 710 cmd += 2; 711 end = -1; 712 } else { 713 cmd++; 714 end = -2; 715 } 716 } else if (*cmd == '*') 717 end = -1, cmd++; 718 else 719 end = start; 720 } 721 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 722 if (tmp == NULL) { 723 (void)fprintf(rl_outstream, "%s: Bad word specifier", 724 command + offs + idx); 725 if (aptr) 726 el_free(aptr); 727 return -1; 728 } 729 } else 730 tmp = strdup(aptr? aptr:ptr); 731 732 if (aptr) 733 el_free(aptr); 734 735 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 736 *result = tmp; 737 return 1; 738 } 739 740 for (; *cmd; cmd++) { 741 if (*cmd == ':') 742 continue; 743 else if (*cmd == 'h') { /* remove trailing path */ 744 if ((aptr = strrchr(tmp, '/')) != NULL) 745 *aptr = '\0'; 746 } else if (*cmd == 't') { /* remove leading path */ 747 if ((aptr = strrchr(tmp, '/')) != NULL) { 748 aptr = strdup(aptr + 1); 749 el_free(tmp); 750 tmp = aptr; 751 } 752 } else if (*cmd == 'r') { /* remove trailing suffix */ 753 if ((aptr = strrchr(tmp, '.')) != NULL) 754 *aptr = '\0'; 755 } else if (*cmd == 'e') { /* remove all but suffix */ 756 if ((aptr = strrchr(tmp, '.')) != NULL) { 757 aptr = strdup(aptr); 758 el_free(tmp); 759 tmp = aptr; 760 } 761 } else if (*cmd == 'p') /* print only */ 762 p_on = 1; 763 else if (*cmd == 'g') 764 g_on = 2; 765 else if (*cmd == 's' || *cmd == '&') { 766 char *what, *with, delim; 767 size_t len, from_len; 768 size_t size; 769 770 if (*cmd == '&' && (from == NULL || to == NULL)) 771 continue; 772 else if (*cmd == 's') { 773 delim = *(++cmd), cmd++; 774 size = 16; 775 what = el_realloc(from, size * sizeof(*what)); 776 if (what == NULL) { 777 el_free(from); 778 el_free(tmp); 779 return 0; 780 } 781 len = 0; 782 for (; *cmd && *cmd != delim; cmd++) { 783 if (*cmd == '\\' && cmd[1] == delim) 784 cmd++; 785 if (len >= size) { 786 char *nwhat; 787 nwhat = el_realloc(what, 788 (size <<= 1) * 789 sizeof(*nwhat)); 790 if (nwhat == NULL) { 791 el_free(what); 792 el_free(tmp); 793 return 0; 794 } 795 what = nwhat; 796 } 797 what[len++] = *cmd; 798 } 799 what[len] = '\0'; 800 from = what; 801 if (*what == '\0') { 802 el_free(what); 803 if (search) { 804 from = strdup(search); 805 if (from == NULL) { 806 el_free(tmp); 807 return 0; 808 } 809 } else { 810 from = NULL; 811 el_free(tmp); 812 return -1; 813 } 814 } 815 cmd++; /* shift after delim */ 816 if (!*cmd) 817 continue; 818 819 size = 16; 820 with = el_realloc(to, size * sizeof(*with)); 821 if (with == NULL) { 822 el_free(to); 823 el_free(tmp); 824 return -1; 825 } 826 len = 0; 827 from_len = strlen(from); 828 for (; *cmd && *cmd != delim; cmd++) { 829 if (len + from_len + 1 >= size) { 830 char *nwith; 831 size += from_len + 1; 832 nwith = el_realloc(with, 833 size * sizeof(*nwith)); 834 if (nwith == NULL) { 835 el_free(with); 836 el_free(tmp); 837 return -1; 838 } 839 with = nwith; 840 } 841 if (*cmd == '&') { 842 /* safe */ 843 (void)strcpy(&with[len], from); 844 len += from_len; 845 continue; 846 } 847 if (*cmd == '\\' 848 && (*(cmd + 1) == delim 849 || *(cmd + 1) == '&')) 850 cmd++; 851 with[len++] = *cmd; 852 } 853 with[len] = '\0'; 854 to = with; 855 } 856 857 aptr = _rl_compat_sub(tmp, from, to, g_on); 858 if (aptr) { 859 el_free(tmp); 860 tmp = aptr; 861 } 862 g_on = 0; 863 } 864 } 865 *result = tmp; 866 return p_on? 2:1; 867 } 868 869 870 /* 871 * csh-style history expansion 872 */ 873 int 874 history_expand(char *str, char **output) 875 { 876 int ret = 0; 877 size_t idx, i, size; 878 char *tmp, *result; 879 880 if (h == NULL || e == NULL) 881 rl_initialize(); 882 883 if (history_expansion_char == 0) { 884 *output = strdup(str); 885 return 0; 886 } 887 888 *output = NULL; 889 if (str[0] == history_subst_char) { 890 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 891 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 892 if (*output == NULL) 893 return 0; 894 (*output)[0] = (*output)[1] = history_expansion_char; 895 (*output)[2] = ':'; 896 (*output)[3] = 's'; 897 (void)strcpy((*output) + 4, str); 898 str = *output; 899 } else { 900 *output = strdup(str); 901 if (*output == NULL) 902 return 0; 903 } 904 905 #define ADD_STRING(what, len, fr) \ 906 { \ 907 if (idx + len + 1 > size) { \ 908 char *nresult = el_realloc(result, \ 909 (size += len + 1) * sizeof(*nresult)); \ 910 if (nresult == NULL) { \ 911 el_free(*output); \ 912 if (/*CONSTCOND*/fr) \ 913 el_free(tmp); \ 914 return 0; \ 915 } \ 916 result = nresult; \ 917 } \ 918 (void)strncpy(&result[idx], what, len); \ 919 idx += len; \ 920 result[idx] = '\0'; \ 921 } 922 923 result = NULL; 924 size = idx = 0; 925 tmp = NULL; 926 for (i = 0; str[i];) { 927 int qchar, loop_again; 928 size_t len, start, j; 929 930 qchar = 0; 931 loop_again = 1; 932 start = j = i; 933 loop: 934 for (; str[j]; j++) { 935 if (str[j] == '\\' && 936 str[j + 1] == history_expansion_char) { 937 (void)strcpy(&str[j], &str[j + 1]); 938 continue; 939 } 940 if (!loop_again) { 941 if (isspace((unsigned char) str[j]) 942 || str[j] == qchar) 943 break; 944 } 945 if (str[j] == history_expansion_char 946 && !strchr(history_no_expand_chars, str[j + 1]) 947 && (!history_inhibit_expansion_function || 948 (*history_inhibit_expansion_function)(str, 949 (int)j) == 0)) 950 break; 951 } 952 953 if (str[j] && loop_again) { 954 i = j; 955 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 956 j++; 957 if (str[j] == history_expansion_char) 958 j++; 959 loop_again = 0; 960 goto loop; 961 } 962 len = i - start; 963 ADD_STRING(&str[start], len, 0); 964 965 if (str[i] == '\0' || str[i] != history_expansion_char) { 966 len = j - i; 967 ADD_STRING(&str[i], len, 0); 968 if (start == 0) 969 ret = 0; 970 else 971 ret = 1; 972 break; 973 } 974 ret = _history_expand_command (str, i, (j - i), &tmp); 975 if (ret > 0 && tmp) { 976 len = strlen(tmp); 977 ADD_STRING(tmp, len, 1); 978 } 979 if (tmp) { 980 el_free(tmp); 981 tmp = NULL; 982 } 983 i = j; 984 } 985 986 /* ret is 2 for "print only" option */ 987 if (ret == 2) { 988 add_history(result); 989 #ifdef GDB_411_HACK 990 /* gdb 4.11 has been shipped with readline, where */ 991 /* history_expand() returned -1 when the line */ 992 /* should not be executed; in readline 2.1+ */ 993 /* it should return 2 in such a case */ 994 ret = -1; 995 #endif 996 } 997 el_free(*output); 998 *output = result; 999 1000 return ret; 1001 } 1002 1003 /* 1004 * Return a string consisting of arguments of "str" from "start" to "end". 1005 */ 1006 char * 1007 history_arg_extract(int start, int end, const char *str) 1008 { 1009 size_t i, len, max; 1010 char **arr, *result = NULL; 1011 1012 arr = history_tokenize(str); 1013 if (!arr) 1014 return NULL; 1015 if (arr && *arr == NULL) 1016 goto out; 1017 1018 for (max = 0; arr[max]; max++) 1019 continue; 1020 max--; 1021 1022 if (start == '$') 1023 start = (int)max; 1024 if (end == '$') 1025 end = (int)max; 1026 if (end < 0) 1027 end = (int)max + end + 1; 1028 if (start < 0) 1029 start = end; 1030 1031 if (start < 0 || end < 0 || (size_t)start > max || 1032 (size_t)end > max || start > end) 1033 goto out; 1034 1035 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1036 len += strlen(arr[i]) + 1; 1037 len++; 1038 result = el_malloc(len * sizeof(*result)); 1039 if (result == NULL) 1040 goto out; 1041 1042 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1043 (void)strcpy(result + len, arr[i]); 1044 len += strlen(arr[i]); 1045 if (i < (size_t)end) 1046 result[len++] = ' '; 1047 } 1048 result[len] = '\0'; 1049 1050 out: 1051 for (i = 0; arr[i]; i++) 1052 el_free(arr[i]); 1053 el_free(arr); 1054 1055 return result; 1056 } 1057 1058 /* 1059 * Parse the string into individual tokens, 1060 * similar to how shell would do it. 1061 */ 1062 char ** 1063 history_tokenize(const char *str) 1064 { 1065 int size = 1, idx = 0, i, start; 1066 size_t len; 1067 char **result = NULL, *temp, delim = '\0'; 1068 1069 for (i = 0; str[i];) { 1070 while (isspace((unsigned char) str[i])) 1071 i++; 1072 start = i; 1073 for (; str[i];) { 1074 if (str[i] == '\\') { 1075 if (str[i+1] != '\0') 1076 i++; 1077 } else if (str[i] == delim) 1078 delim = '\0'; 1079 else if (!delim && 1080 (isspace((unsigned char) str[i]) || 1081 strchr("()<>;&|$", str[i]))) 1082 break; 1083 else if (!delim && strchr("'`\"", str[i])) 1084 delim = str[i]; 1085 if (str[i]) 1086 i++; 1087 } 1088 1089 if (idx + 2 >= size) { 1090 char **nresult; 1091 size <<= 1; 1092 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1093 if (nresult == NULL) { 1094 el_free(result); 1095 return NULL; 1096 } 1097 result = nresult; 1098 } 1099 len = (size_t)i - (size_t)start; 1100 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1101 if (temp == NULL) { 1102 for (i = 0; i < idx; i++) 1103 el_free(result[i]); 1104 el_free(result); 1105 return NULL; 1106 } 1107 (void)strncpy(temp, &str[start], len); 1108 temp[len] = '\0'; 1109 result[idx++] = temp; 1110 result[idx] = NULL; 1111 if (str[i]) 1112 i++; 1113 } 1114 return result; 1115 } 1116 1117 1118 /* 1119 * limit size of history record to ``max'' events 1120 */ 1121 void 1122 stifle_history(int max) 1123 { 1124 HistEvent ev; 1125 1126 if (h == NULL || e == NULL) 1127 rl_initialize(); 1128 1129 if (history(h, &ev, H_SETSIZE, max) == 0) 1130 max_input_history = max; 1131 } 1132 1133 1134 /* 1135 * "unlimit" size of history - set the limit to maximum allowed int value 1136 */ 1137 int 1138 unstifle_history(void) 1139 { 1140 HistEvent ev; 1141 int omax; 1142 1143 history(h, &ev, H_SETSIZE, INT_MAX); 1144 omax = max_input_history; 1145 max_input_history = INT_MAX; 1146 return omax; /* some value _must_ be returned */ 1147 } 1148 1149 1150 int 1151 history_is_stifled(void) 1152 { 1153 1154 /* cannot return true answer */ 1155 return max_input_history != INT_MAX; 1156 } 1157 1158 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1159 1160 int 1161 history_truncate_file (const char *filename, int nlines) 1162 { 1163 int ret = 0; 1164 FILE *fp, *tp; 1165 char template[sizeof(_history_tmp_template)]; 1166 char buf[4096]; 1167 int fd; 1168 char *cp; 1169 off_t off; 1170 int count = 0; 1171 ssize_t left = 0; 1172 1173 if (filename == NULL && (filename = _default_history_file()) == NULL) 1174 return errno; 1175 if ((fp = fopen(filename, "r+")) == NULL) 1176 return errno; 1177 strcpy(template, _history_tmp_template); 1178 if ((fd = mkstemp(template)) == -1) { 1179 ret = errno; 1180 goto out1; 1181 } 1182 1183 if ((tp = fdopen(fd, "r+")) == NULL) { 1184 close(fd); 1185 ret = errno; 1186 goto out2; 1187 } 1188 1189 for(;;) { 1190 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1191 if (ferror(fp)) { 1192 ret = errno; 1193 break; 1194 } 1195 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1196 (off_t)-1) { 1197 ret = errno; 1198 break; 1199 } 1200 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1201 if (ferror(fp)) { 1202 ret = errno; 1203 break; 1204 } 1205 if (left == 0) { 1206 count--; 1207 left = sizeof(buf); 1208 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1209 != 1) { 1210 ret = errno; 1211 break; 1212 } 1213 fflush(tp); 1214 break; 1215 } 1216 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1217 ret = errno; 1218 break; 1219 } 1220 count++; 1221 } 1222 if (ret) 1223 goto out3; 1224 cp = buf + left - 1; 1225 if(*cp != '\n') 1226 cp++; 1227 for(;;) { 1228 while (--cp >= buf) { 1229 if (*cp == '\n') { 1230 if (--nlines == 0) { 1231 if (++cp >= buf + sizeof(buf)) { 1232 count++; 1233 cp = buf; 1234 } 1235 break; 1236 } 1237 } 1238 } 1239 if (nlines <= 0 || count == 0) 1240 break; 1241 count--; 1242 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1243 ret = errno; 1244 break; 1245 } 1246 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1247 if (ferror(tp)) { 1248 ret = errno; 1249 break; 1250 } 1251 ret = EAGAIN; 1252 break; 1253 } 1254 cp = buf + sizeof(buf); 1255 } 1256 1257 if (ret || nlines > 0) 1258 goto out3; 1259 1260 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1261 ret = errno; 1262 goto out3; 1263 } 1264 1265 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1266 (off_t)-1) { 1267 ret = errno; 1268 goto out3; 1269 } 1270 1271 for(;;) { 1272 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1273 if (ferror(fp)) 1274 ret = errno; 1275 break; 1276 } 1277 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1278 ret = errno; 1279 break; 1280 } 1281 } 1282 fflush(fp); 1283 if((off = ftello(fp)) > 0) 1284 (void)ftruncate(fileno(fp), off); 1285 out3: 1286 fclose(tp); 1287 out2: 1288 unlink(template); 1289 out1: 1290 fclose(fp); 1291 1292 return ret; 1293 } 1294 1295 1296 /* 1297 * read history from a file given 1298 */ 1299 int 1300 read_history(const char *filename) 1301 { 1302 HistEvent ev; 1303 1304 if (h == NULL || e == NULL) 1305 rl_initialize(); 1306 if (filename == NULL && (filename = _default_history_file()) == NULL) 1307 return errno; 1308 return history(h, &ev, H_LOAD, filename) == -1 ? 1309 (errno ? errno : EINVAL) : 0; 1310 } 1311 1312 1313 /* 1314 * write history to a file given 1315 */ 1316 int 1317 write_history(const char *filename) 1318 { 1319 HistEvent ev; 1320 1321 if (h == NULL || e == NULL) 1322 rl_initialize(); 1323 if (filename == NULL && (filename = _default_history_file()) == NULL) 1324 return errno; 1325 return history(h, &ev, H_SAVE, filename) == -1 ? 1326 (errno ? errno : EINVAL) : 0; 1327 } 1328 1329 1330 /* 1331 * returns history ``num''th event 1332 * 1333 * returned pointer points to static variable 1334 */ 1335 HIST_ENTRY * 1336 history_get(int num) 1337 { 1338 static HIST_ENTRY she; 1339 HistEvent ev; 1340 int curr_num; 1341 1342 if (h == NULL || e == NULL) 1343 rl_initialize(); 1344 1345 /* save current position */ 1346 if (history(h, &ev, H_CURR) != 0) 1347 return NULL; 1348 curr_num = ev.num; 1349 1350 /* start from the oldest */ 1351 if (history(h, &ev, H_LAST) != 0) 1352 return NULL; /* error */ 1353 1354 /* look forwards for event matching specified offset */ 1355 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1356 return NULL; 1357 1358 she.line = ev.str; 1359 1360 /* restore pointer to where it was */ 1361 (void)history(h, &ev, H_SET, curr_num); 1362 1363 return &she; 1364 } 1365 1366 1367 /* 1368 * add the line to history table 1369 */ 1370 int 1371 add_history(const char *line) 1372 { 1373 HistEvent ev; 1374 1375 if (line == NULL) 1376 return 0; 1377 1378 if (h == NULL || e == NULL) 1379 rl_initialize(); 1380 1381 (void)history(h, &ev, H_ENTER, line); 1382 if (history(h, &ev, H_GETSIZE) == 0) 1383 history_length = ev.num; 1384 1385 return !(history_length > 0); /* return 0 if all is okay */ 1386 } 1387 1388 1389 /* 1390 * remove the specified entry from the history list and return it. 1391 */ 1392 HIST_ENTRY * 1393 remove_history(int num) 1394 { 1395 HIST_ENTRY *he; 1396 HistEvent ev; 1397 1398 if (h == NULL || e == NULL) 1399 rl_initialize(); 1400 1401 if ((he = el_malloc(sizeof(*he))) == NULL) 1402 return NULL; 1403 1404 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1405 el_free(he); 1406 return NULL; 1407 } 1408 1409 he->line = ev.str; 1410 if (history(h, &ev, H_GETSIZE) == 0) 1411 history_length = ev.num; 1412 1413 return he; 1414 } 1415 1416 1417 /* 1418 * replace the line and data of the num-th entry 1419 */ 1420 HIST_ENTRY * 1421 replace_history_entry(int num, const char *line, histdata_t data) 1422 { 1423 HIST_ENTRY *he; 1424 HistEvent ev; 1425 int curr_num; 1426 1427 if (h == NULL || e == NULL) 1428 rl_initialize(); 1429 1430 /* save current position */ 1431 if (history(h, &ev, H_CURR) != 0) 1432 return NULL; 1433 curr_num = ev.num; 1434 1435 /* start from the oldest */ 1436 if (history(h, &ev, H_LAST) != 0) 1437 return NULL; /* error */ 1438 1439 if ((he = el_malloc(sizeof(*he))) == NULL) 1440 return NULL; 1441 1442 /* look forwards for event matching specified offset */ 1443 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1444 goto out; 1445 1446 he->line = strdup(ev.str); 1447 if (he->line == NULL) 1448 goto out; 1449 1450 if (history(h, &ev, H_REPLACE, line, data)) 1451 goto out; 1452 1453 /* restore pointer to where it was */ 1454 if (history(h, &ev, H_SET, curr_num)) 1455 goto out; 1456 1457 return he; 1458 out: 1459 el_free(he); 1460 return NULL; 1461 } 1462 1463 /* 1464 * clear the history list - delete all entries 1465 */ 1466 void 1467 clear_history(void) 1468 { 1469 HistEvent ev; 1470 1471 (void)history(h, &ev, H_CLEAR); 1472 history_length = 0; 1473 } 1474 1475 1476 /* 1477 * returns offset of the current history event 1478 */ 1479 int 1480 where_history(void) 1481 { 1482 HistEvent ev; 1483 int curr_num, off; 1484 1485 if (history(h, &ev, H_CURR) != 0) 1486 return 0; 1487 curr_num = ev.num; 1488 1489 (void)history(h, &ev, H_FIRST); 1490 off = 1; 1491 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1492 off++; 1493 1494 return off; 1495 } 1496 1497 1498 /* 1499 * returns current history event or NULL if there is no such event 1500 */ 1501 HIST_ENTRY * 1502 current_history(void) 1503 { 1504 1505 return _move_history(H_CURR); 1506 } 1507 1508 1509 /* 1510 * returns total number of bytes history events' data are using 1511 */ 1512 int 1513 history_total_bytes(void) 1514 { 1515 HistEvent ev; 1516 int curr_num; 1517 size_t size; 1518 1519 if (history(h, &ev, H_CURR) != 0) 1520 return -1; 1521 curr_num = ev.num; 1522 1523 (void)history(h, &ev, H_FIRST); 1524 size = 0; 1525 do 1526 size += strlen(ev.str) * sizeof(*ev.str); 1527 while (history(h, &ev, H_NEXT) == 0); 1528 1529 /* get to the same position as before */ 1530 history(h, &ev, H_PREV_EVENT, curr_num); 1531 1532 return (int)size; 1533 } 1534 1535 1536 /* 1537 * sets the position in the history list to ``pos'' 1538 */ 1539 int 1540 history_set_pos(int pos) 1541 { 1542 HistEvent ev; 1543 int curr_num; 1544 1545 if (pos >= history_length || pos < 0) 1546 return -1; 1547 1548 (void)history(h, &ev, H_CURR); 1549 curr_num = ev.num; 1550 1551 /* 1552 * use H_DELDATA to set to nth history (without delete) by passing 1553 * (void **)-1 1554 */ 1555 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1556 (void)history(h, &ev, H_SET, curr_num); 1557 return -1; 1558 } 1559 return 0; 1560 } 1561 1562 1563 /* 1564 * returns previous event in history and shifts pointer accordingly 1565 */ 1566 HIST_ENTRY * 1567 previous_history(void) 1568 { 1569 1570 return _move_history(H_PREV); 1571 } 1572 1573 1574 /* 1575 * returns next event in history and shifts pointer accordingly 1576 */ 1577 HIST_ENTRY * 1578 next_history(void) 1579 { 1580 1581 return _move_history(H_NEXT); 1582 } 1583 1584 1585 /* 1586 * searches for first history event containing the str 1587 */ 1588 int 1589 history_search(const char *str, int direction) 1590 { 1591 HistEvent ev; 1592 const char *strp; 1593 int curr_num; 1594 1595 if (history(h, &ev, H_CURR) != 0) 1596 return -1; 1597 curr_num = ev.num; 1598 1599 for (;;) { 1600 if ((strp = strstr(ev.str, str)) != NULL) 1601 return (int)(strp - ev.str); 1602 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1603 break; 1604 } 1605 (void)history(h, &ev, H_SET, curr_num); 1606 return -1; 1607 } 1608 1609 1610 /* 1611 * searches for first history event beginning with str 1612 */ 1613 int 1614 history_search_prefix(const char *str, int direction) 1615 { 1616 HistEvent ev; 1617 1618 return (history(h, &ev, direction < 0 ? 1619 H_PREV_STR : H_NEXT_STR, str)); 1620 } 1621 1622 1623 /* 1624 * search for event in history containing str, starting at offset 1625 * abs(pos); continue backward, if pos<0, forward otherwise 1626 */ 1627 /* ARGSUSED */ 1628 int 1629 history_search_pos(const char *str, 1630 int direction __attribute__((__unused__)), int pos) 1631 { 1632 HistEvent ev; 1633 int curr_num, off; 1634 1635 off = (pos > 0) ? pos : -pos; 1636 pos = (pos > 0) ? 1 : -1; 1637 1638 if (history(h, &ev, H_CURR) != 0) 1639 return -1; 1640 curr_num = ev.num; 1641 1642 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1643 return -1; 1644 1645 for (;;) { 1646 if (strstr(ev.str, str)) 1647 return off; 1648 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1649 break; 1650 } 1651 1652 /* set "current" pointer back to previous state */ 1653 (void)history(h, &ev, 1654 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1655 1656 return -1; 1657 } 1658 1659 1660 /********************************/ 1661 /* completion functions */ 1662 1663 char * 1664 tilde_expand(char *name) 1665 { 1666 return fn_tilde_expand(name); 1667 } 1668 1669 char * 1670 filename_completion_function(const char *name, int state) 1671 { 1672 return fn_filename_completion_function(name, state); 1673 } 1674 1675 /* 1676 * a completion generator for usernames; returns _first_ username 1677 * which starts with supplied text 1678 * text contains a partial username preceded by random character 1679 * (usually '~'); state resets search from start (??? should we do that anyway) 1680 * it's callers responsibility to free returned value 1681 */ 1682 char * 1683 username_completion_function(const char *text, int state) 1684 { 1685 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1686 struct passwd pwres; 1687 char pwbuf[1024]; 1688 #endif 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 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1702 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1703 #else 1704 (pass = getpwent()) != NULL 1705 #endif 1706 && text[0] == pass->pw_name[0] 1707 && strcmp(text, pass->pw_name) == 0) 1708 continue; 1709 1710 if (pass == NULL) { 1711 endpwent(); 1712 return NULL; 1713 } 1714 return strdup(pass->pw_name); 1715 } 1716 1717 1718 /* 1719 * el-compatible wrapper to send TSTP on ^Z 1720 */ 1721 /* ARGSUSED */ 1722 static unsigned char 1723 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1724 { 1725 (void)kill(0, SIGTSTP); 1726 return CC_NORM; 1727 } 1728 1729 /* 1730 * Display list of strings in columnar format on readline's output stream. 1731 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1732 * 'max' is maximum length of string in 'matches'. 1733 */ 1734 void 1735 rl_display_match_list(char **matches, int len, int max) 1736 { 1737 1738 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1739 } 1740 1741 static const char * 1742 /*ARGSUSED*/ 1743 _rl_completion_append_character_function(const char *dummy 1744 __attribute__((__unused__))) 1745 { 1746 static char buf[2]; 1747 buf[0] = (char)rl_completion_append_character; 1748 buf[1] = '\0'; 1749 return buf; 1750 } 1751 1752 1753 /* 1754 * complete word at current point 1755 */ 1756 /* ARGSUSED */ 1757 int 1758 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1759 { 1760 #ifdef WIDECHAR 1761 static ct_buffer_t wbreak_conv, sprefix_conv; 1762 #endif 1763 char *breakchars; 1764 1765 if (h == NULL || e == NULL) 1766 rl_initialize(); 1767 1768 if (rl_inhibit_completion) { 1769 char arr[2]; 1770 arr[0] = (char)invoking_key; 1771 arr[1] = '\0'; 1772 el_insertstr(e, arr); 1773 return CC_REFRESH; 1774 } 1775 1776 if (rl_completion_word_break_hook != NULL) 1777 breakchars = (*rl_completion_word_break_hook)(); 1778 else 1779 breakchars = rl_basic_word_break_characters; 1780 1781 /* Just look at how many global variables modify this operation! */ 1782 return fn_complete(e, 1783 (CPFunction *)rl_completion_entry_function, 1784 rl_attempted_completion_function, 1785 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1786 ct_decode_string(breakchars, &sprefix_conv), 1787 _rl_completion_append_character_function, 1788 (size_t)rl_completion_query_items, 1789 &rl_completion_type, &rl_attempted_completion_over, 1790 &rl_point, &rl_end); 1791 1792 1793 } 1794 1795 1796 /* ARGSUSED */ 1797 static unsigned char 1798 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1799 { 1800 return (unsigned char)rl_complete(0, ch); 1801 } 1802 1803 /* 1804 * misc other functions 1805 */ 1806 1807 /* 1808 * bind key c to readline-type function func 1809 */ 1810 int 1811 rl_bind_key(int c, rl_command_func_t *func) 1812 { 1813 int retval = -1; 1814 1815 if (h == NULL || e == NULL) 1816 rl_initialize(); 1817 1818 if (func == rl_insert) { 1819 /* XXX notice there is no range checking of ``c'' */ 1820 e->el_map.key[c] = ED_INSERT; 1821 retval = 0; 1822 } 1823 return retval; 1824 } 1825 1826 1827 /* 1828 * read one key from input - handles chars pushed back 1829 * to input stream also 1830 */ 1831 int 1832 rl_read_key(void) 1833 { 1834 char fooarr[2 * sizeof(int)]; 1835 1836 if (e == NULL || h == NULL) 1837 rl_initialize(); 1838 1839 return el_getc(e, fooarr); 1840 } 1841 1842 1843 /* 1844 * reset the terminal 1845 */ 1846 /* ARGSUSED */ 1847 void 1848 rl_reset_terminal(const char *p __attribute__((__unused__))) 1849 { 1850 1851 if (h == NULL || e == NULL) 1852 rl_initialize(); 1853 el_reset(e); 1854 } 1855 1856 1857 /* 1858 * insert character ``c'' back into input stream, ``count'' times 1859 */ 1860 int 1861 rl_insert(int count, int c) 1862 { 1863 char arr[2]; 1864 1865 if (h == NULL || e == NULL) 1866 rl_initialize(); 1867 1868 /* XXX - int -> char conversion can lose on multichars */ 1869 arr[0] = (char)c; 1870 arr[1] = '\0'; 1871 1872 for (; count > 0; count--) 1873 el_push(e, arr); 1874 1875 return 0; 1876 } 1877 1878 int 1879 rl_insert_text(const char *text) 1880 { 1881 if (!text || *text == 0) 1882 return 0; 1883 1884 if (h == NULL || e == NULL) 1885 rl_initialize(); 1886 1887 if (el_insertstr(e, text) < 0) 1888 return 0; 1889 return (int)strlen(text); 1890 } 1891 1892 /*ARGSUSED*/ 1893 int 1894 rl_newline(int count __attribute__((__unused__)), 1895 int c __attribute__((__unused__))) 1896 { 1897 /* 1898 * Readline-4.0 appears to ignore the args. 1899 */ 1900 return rl_insert(1, '\n'); 1901 } 1902 1903 /*ARGSUSED*/ 1904 static unsigned char 1905 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1906 { 1907 if (map[c] == NULL) 1908 return CC_ERROR; 1909 1910 _rl_update_pos(); 1911 1912 (*map[c])(NULL, c); 1913 1914 /* If rl_done was set by the above call, deal with it here */ 1915 if (rl_done) 1916 return CC_EOF; 1917 1918 return CC_NORM; 1919 } 1920 1921 int 1922 rl_add_defun(const char *name, Function *fun, int c) 1923 { 1924 char dest[8]; 1925 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1926 return -1; 1927 map[(unsigned char)c] = fun; 1928 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1929 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1930 el_set(e, EL_BIND, dest, name, NULL); 1931 return 0; 1932 } 1933 1934 void 1935 rl_callback_read_char(void) 1936 { 1937 int count = 0, done = 0; 1938 const char *buf = el_gets(e, &count); 1939 char *wbuf; 1940 1941 if (buf == NULL || count-- <= 0) 1942 return; 1943 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1944 done = 1; 1945 if (buf[count] == '\n' || buf[count] == '\r') 1946 done = 2; 1947 1948 if (done && rl_linefunc != NULL) { 1949 el_set(e, EL_UNBUFFERED, 0); 1950 if (done == 2) { 1951 if ((wbuf = strdup(buf)) != NULL) 1952 wbuf[count] = '\0'; 1953 } else 1954 wbuf = NULL; 1955 (*(void (*)(const char *))rl_linefunc)(wbuf); 1956 //el_set(e, EL_UNBUFFERED, 1); 1957 } 1958 } 1959 1960 void 1961 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1962 { 1963 if (e == NULL) { 1964 rl_initialize(); 1965 } 1966 (void)rl_set_prompt(prompt); 1967 rl_linefunc = linefunc; 1968 el_set(e, EL_UNBUFFERED, 1); 1969 } 1970 1971 void 1972 rl_callback_handler_remove(void) 1973 { 1974 el_set(e, EL_UNBUFFERED, 0); 1975 rl_linefunc = NULL; 1976 } 1977 1978 void 1979 rl_redisplay(void) 1980 { 1981 char a[2]; 1982 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 1983 a[1] = '\0'; 1984 el_push(e, a); 1985 } 1986 1987 int 1988 rl_get_previous_history(int count, int key) 1989 { 1990 char a[2]; 1991 a[0] = (char)key; 1992 a[1] = '\0'; 1993 while (count--) 1994 el_push(e, a); 1995 return 0; 1996 } 1997 1998 void 1999 /*ARGSUSED*/ 2000 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2001 { 2002 el_set(e, EL_PREP_TERM, 1); 2003 } 2004 2005 void 2006 rl_deprep_terminal(void) 2007 { 2008 el_set(e, EL_PREP_TERM, 0); 2009 } 2010 2011 int 2012 rl_read_init_file(const char *s) 2013 { 2014 return el_source(e, s); 2015 } 2016 2017 int 2018 rl_parse_and_bind(const char *line) 2019 { 2020 const char **argv; 2021 int argc; 2022 Tokenizer *tok; 2023 2024 tok = tok_init(NULL); 2025 tok_str(tok, line, &argc, &argv); 2026 argc = el_parse(e, argc, argv); 2027 tok_end(tok); 2028 return argc ? 1 : 0; 2029 } 2030 2031 int 2032 rl_variable_bind(const char *var, const char *value) 2033 { 2034 /* 2035 * The proper return value is undocument, but this is what the 2036 * readline source seems to do. 2037 */ 2038 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2039 } 2040 2041 void 2042 rl_stuff_char(int c) 2043 { 2044 char buf[2]; 2045 2046 buf[0] = (char)c; 2047 buf[1] = '\0'; 2048 el_insertstr(e, buf); 2049 } 2050 2051 static int 2052 _rl_event_read_char(EditLine *el, char *cp) 2053 { 2054 int n; 2055 ssize_t num_read = 0; 2056 2057 *cp = '\0'; 2058 while (rl_event_hook) { 2059 2060 (*rl_event_hook)(); 2061 2062 #if defined(FIONREAD) 2063 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2064 return -1; 2065 if (n) 2066 num_read = read(el->el_infd, cp, (size_t)1); 2067 else 2068 num_read = 0; 2069 #elif defined(F_SETFL) && defined(O_NDELAY) 2070 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2071 return -1; 2072 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2073 return -1; 2074 num_read = read(el->el_infd, cp, 1); 2075 if (fcntl(el->el_infd, F_SETFL, n)) 2076 return -1; 2077 #else 2078 /* not non-blocking, but what you gonna do? */ 2079 num_read = read(el->el_infd, cp, 1); 2080 return -1; 2081 #endif 2082 2083 if (num_read < 0 && errno == EAGAIN) 2084 continue; 2085 if (num_read == 0) 2086 continue; 2087 break; 2088 } 2089 if (!rl_event_hook) 2090 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2091 return (int)num_read; 2092 } 2093 2094 static void 2095 _rl_update_pos(void) 2096 { 2097 const LineInfo *li = el_line(e); 2098 2099 rl_point = (int)(li->cursor - li->buffer); 2100 rl_end = (int)(li->lastchar - li->buffer); 2101 } 2102 2103 void 2104 rl_get_screen_size(int *rows, int *cols) 2105 { 2106 if (rows) 2107 el_get(e, EL_GETTC, "li", rows, (void *)0); 2108 if (cols) 2109 el_get(e, EL_GETTC, "co", cols, (void *)0); 2110 } 2111 2112 void 2113 rl_set_screen_size(int rows, int cols) 2114 { 2115 char buf[64]; 2116 (void)snprintf(buf, sizeof(buf), "%d", rows); 2117 el_set(e, EL_SETTC, "li", buf, NULL); 2118 (void)snprintf(buf, sizeof(buf), "%d", cols); 2119 el_set(e, EL_SETTC, "co", buf, NULL); 2120 } 2121 2122 char ** 2123 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2124 { 2125 size_t len, max, i, j, min; 2126 char **list, *match, *a, *b; 2127 2128 len = 1; 2129 max = 10; 2130 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2131 return NULL; 2132 2133 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2134 list[len++] = match; 2135 if (len == max) { 2136 char **nl; 2137 max += 10; 2138 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2139 goto out; 2140 list = nl; 2141 } 2142 } 2143 if (len == 1) 2144 goto out; 2145 list[len] = NULL; 2146 if (len == 2) { 2147 if ((list[0] = strdup(list[1])) == NULL) 2148 goto out; 2149 return list; 2150 } 2151 qsort(&list[1], len - 1, sizeof(*list), 2152 (int (*)(const void *, const void *)) strcmp); 2153 min = SIZE_T_MAX; 2154 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2155 b = list[i + 1]; 2156 for (j = 0; a[j] && a[j] == b[j]; j++) 2157 continue; 2158 if (min > j) 2159 min = j; 2160 } 2161 if (min == 0 && *str) { 2162 if ((list[0] = strdup(str)) == NULL) 2163 goto out; 2164 } else { 2165 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2166 goto out; 2167 (void)memcpy(list[0], list[1], min); 2168 list[0][min] = '\0'; 2169 } 2170 return list; 2171 2172 out: 2173 el_free(list); 2174 return NULL; 2175 } 2176 2177 char * 2178 rl_filename_completion_function (const char *text, int state) 2179 { 2180 return fn_filename_completion_function(text, state); 2181 } 2182 2183 void 2184 rl_forced_update_display(void) 2185 { 2186 el_set(e, EL_REFRESH); 2187 } 2188 2189 int 2190 _rl_abort_internal(void) 2191 { 2192 el_beep(e); 2193 longjmp(topbuf, 1); 2194 /*NOTREACHED*/ 2195 } 2196 2197 int 2198 _rl_qsort_string_compare(char **s1, char **s2) 2199 { 2200 return strcoll(*s1, *s2); 2201 } 2202 2203 HISTORY_STATE * 2204 history_get_history_state(void) 2205 { 2206 HISTORY_STATE *hs; 2207 2208 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2209 return NULL; 2210 hs->length = history_length; 2211 return hs; 2212 } 2213 2214 int 2215 /*ARGSUSED*/ 2216 rl_kill_text(int from __attribute__((__unused__)), 2217 int to __attribute__((__unused__))) 2218 { 2219 return 0; 2220 } 2221 2222 Keymap 2223 rl_make_bare_keymap(void) 2224 { 2225 return NULL; 2226 } 2227 2228 Keymap 2229 rl_get_keymap(void) 2230 { 2231 return NULL; 2232 } 2233 2234 void 2235 /*ARGSUSED*/ 2236 rl_set_keymap(Keymap k __attribute__((__unused__))) 2237 { 2238 } 2239 2240 int 2241 /*ARGSUSED*/ 2242 rl_generic_bind(int type __attribute__((__unused__)), 2243 const char * keyseq __attribute__((__unused__)), 2244 const char * data __attribute__((__unused__)), 2245 Keymap k __attribute__((__unused__))) 2246 { 2247 return 0; 2248 } 2249 2250 int 2251 /*ARGSUSED*/ 2252 rl_bind_key_in_map(int key __attribute__((__unused__)), 2253 rl_command_func_t *fun __attribute__((__unused__)), 2254 Keymap k __attribute__((__unused__))) 2255 { 2256 return 0; 2257 } 2258 2259 /* unsupported, but needed by python */ 2260 void 2261 rl_cleanup_after_signal(void) 2262 { 2263 } 2264 2265 int 2266 rl_on_new_line(void) 2267 { 2268 return 0; 2269 } 2270 2271 void 2272 rl_free_line_state(void) 2273 { 2274 } 2275