1 /* $NetBSD: readline.c,v 1.88 2010/01/03 18:27:10 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 1.88 2010/01/03 18:27:10 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #ifdef HAVE_VIS_H 51 #include <vis.h> 52 #else 53 #include "np/vis.h" 54 #endif 55 #include "readline/readline.h" 56 #include "el.h" 57 #include "fcns.h" /* for EL_NUM_FCNS */ 58 #include "histedit.h" 59 #include "filecomplete.h" 60 61 void rl_prep_terminal(int); 62 void rl_deprep_terminal(void); 63 64 /* for rl_complete() */ 65 #define TAB '\r' 66 67 /* see comment at the #ifdef for sense of this */ 68 /* #define GDB_411_HACK */ 69 70 /* readline compatibility stuff - look at readline sources/documentation */ 71 /* to see what these variables mean */ 72 const char *rl_library_version = "EditLine wrapper"; 73 int rl_readline_version = RL_READLINE_VERSION; 74 static char empty[] = { '\0' }; 75 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 76 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 77 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 78 char *rl_readline_name = empty; 79 FILE *rl_instream = NULL; 80 FILE *rl_outstream = NULL; 81 int rl_point = 0; 82 int rl_end = 0; 83 char *rl_line_buffer = NULL; 84 VCPFunction *rl_linefunc = NULL; 85 int rl_done = 0; 86 VFunction *rl_event_hook = NULL; 87 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 88 emacs_meta_keymap, 89 emacs_ctlx_keymap; 90 91 int history_base = 1; /* probably never subject to change */ 92 int history_length = 0; 93 int max_input_history = 0; 94 char history_expansion_char = '!'; 95 char history_subst_char = '^'; 96 char *history_no_expand_chars = expand_chars; 97 Function *history_inhibit_expansion_function = NULL; 98 char *history_arg_extract(int start, int end, const char *str); 99 100 int rl_inhibit_completion = 0; 101 int rl_attempted_completion_over = 0; 102 char *rl_basic_word_break_characters = break_chars; 103 char *rl_completer_word_break_characters = NULL; 104 char *rl_completer_quote_characters = NULL; 105 Function *rl_completion_entry_function = NULL; 106 CPPFunction *rl_attempted_completion_function = NULL; 107 Function *rl_pre_input_hook = NULL; 108 Function *rl_startup1_hook = NULL; 109 int (*rl_getc_function)(FILE *) = NULL; 110 char *rl_terminal_name = NULL; 111 int rl_already_prompted = 0; 112 int rl_filename_completion_desired = 0; 113 int rl_ignore_completion_duplicates = 0; 114 int rl_catch_signals = 1; 115 int readline_echoing_p = 1; 116 int _rl_print_completions_horizontally = 0; 117 VFunction *rl_redisplay_function = NULL; 118 Function *rl_startup_hook = NULL; 119 VFunction *rl_completion_display_matches_hook = NULL; 120 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 121 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 122 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 123 124 #ifdef WIDECHAR 125 static ct_buffer_t conv; 126 #endif 127 128 /* 129 * The current prompt string. 130 */ 131 char *rl_prompt = NULL; 132 /* 133 * This is set to character indicating type of completion being done by 134 * rl_complete_internal(); this is available for application completion 135 * functions. 136 */ 137 int rl_completion_type = 0; 138 139 /* 140 * If more than this number of items results from query for possible 141 * completions, we ask user if they are sure to really display the list. 142 */ 143 int rl_completion_query_items = 100; 144 145 /* 146 * List of characters which are word break characters, but should be left 147 * in the parsed text when it is passed to the completion function. 148 * Shell uses this to help determine what kind of completing to do. 149 */ 150 char *rl_special_prefixes = NULL; 151 152 /* 153 * This is the character appended to the completed words if at the end of 154 * the line. Default is ' ' (a space). 155 */ 156 int rl_completion_append_character = ' '; 157 158 /* stuff below is used internally by libedit for readline emulation */ 159 160 static TYPE(History) *h = NULL; 161 static EditLine *e = NULL; 162 static Function *map[256]; 163 static jmp_buf topbuf; 164 165 /* internal functions */ 166 static unsigned char _el_rl_complete(EditLine *, int); 167 static unsigned char _el_rl_tstp(EditLine *, int); 168 static char *_get_prompt(EditLine *); 169 static int _getc_function(EditLine *, char *); 170 static HIST_ENTRY *_move_history(int); 171 static int _history_expand_command(const char *, size_t, size_t, 172 char **); 173 static char *_rl_compat_sub(const char *, const char *, 174 const char *, int); 175 static int _rl_event_read_char(EditLine *, char *); 176 static void _rl_update_pos(void); 177 178 179 /* ARGSUSED */ 180 static char * 181 _get_prompt(EditLine *el __attribute__((__unused__))) 182 { 183 rl_already_prompted = 1; 184 return (rl_prompt); 185 } 186 187 188 /* 189 * generic function for moving around history 190 */ 191 static HIST_ENTRY * 192 _move_history(int op) 193 { 194 TYPE(HistEvent) ev; 195 static HIST_ENTRY rl_he; 196 197 if (FUNW(history)(h, &ev, op) != 0) 198 return (HIST_ENTRY *) NULL; 199 200 rl_he.line = ct_encode_string(ev.str, &conv); 201 rl_he.data = NULL; 202 203 return (&rl_he); 204 } 205 206 207 /* 208 * read one key from user defined input function 209 */ 210 static int 211 /*ARGSUSED*/ 212 _getc_function(EditLine *el, char *c) 213 { 214 int i; 215 216 i = (*rl_getc_function)(NULL); 217 if (i == -1) 218 return 0; 219 *c = i; 220 return 1; 221 } 222 223 static const char _dothistory[] = "/.history"; 224 225 static const char * 226 _default_history_file(void) 227 { 228 struct passwd *p; 229 static char path[PATH_MAX]; 230 231 if (*path) 232 return path; 233 if ((p = getpwuid(getuid())) == NULL) 234 return NULL; 235 strlcpy(path, p->pw_dir, PATH_MAX); 236 strlcat(path, _dothistory, PATH_MAX); 237 return path; 238 } 239 240 /* 241 * READLINE compatibility stuff 242 */ 243 244 /* 245 * Set the prompt 246 */ 247 int 248 rl_set_prompt(const char *prompt) 249 { 250 char *p; 251 252 if (!prompt) 253 prompt = ""; 254 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 255 return 0; 256 if (rl_prompt) 257 free(rl_prompt); 258 rl_prompt = strdup(prompt); 259 if (rl_prompt == NULL) 260 return -1; 261 262 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 263 *p = RL_PROMPT_START_IGNORE; 264 265 return 0; 266 } 267 268 /* 269 * initialize rl compat stuff 270 */ 271 int 272 rl_initialize(void) 273 { 274 TYPE(HistEvent) ev; 275 const LineInfo *li; 276 int editmode = 1; 277 struct termios t; 278 279 if (e != NULL) 280 el_end(e); 281 if (h != NULL) 282 FUN(history,end)(h); 283 284 if (!rl_instream) 285 rl_instream = stdin; 286 if (!rl_outstream) 287 rl_outstream = stdout; 288 289 /* 290 * See if we don't really want to run the editor 291 */ 292 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 293 editmode = 0; 294 295 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 296 297 if (!editmode) 298 FUN(el,set)(e, EL_EDITMODE, 0); 299 300 h = FUN(history,init)(); 301 if (!e || !h) 302 return (-1); 303 304 FUNW(history)(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 305 history_length = 0; 306 max_input_history = INT_MAX; 307 el_set(e, EL_HIST, history, h); 308 309 /* setup getc function if valid */ 310 if (rl_getc_function) 311 el_set(e, EL_GETCFN, _getc_function); 312 313 /* for proper prompt printing in readline() */ 314 if (rl_set_prompt("") == -1) { 315 FUN(history,end)(h); 316 el_end(e); 317 return -1; 318 } 319 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 320 el_set(e, EL_SIGNAL, rl_catch_signals); 321 322 /* set default mode to "emacs"-style and read setting afterwards */ 323 /* so this can be overriden */ 324 el_set(e, EL_EDITOR, "emacs"); 325 if (rl_terminal_name != NULL) 326 el_set(e, EL_TERMINAL, rl_terminal_name); 327 else 328 el_get(e, EL_TERMINAL, &rl_terminal_name); 329 330 /* 331 * Word completion - this has to go AFTER rebinding keys 332 * to emacs-style. 333 */ 334 el_set(e, EL_ADDFN, "rl_complete", 335 "ReadLine compatible completion function", 336 _el_rl_complete); 337 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 338 339 /* 340 * Send TSTP when ^Z is pressed. 341 */ 342 el_set(e, EL_ADDFN, "rl_tstp", 343 "ReadLine compatible suspend function", 344 _el_rl_tstp); 345 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 346 347 /* read settings from configuration file */ 348 el_source(e, NULL); 349 350 /* 351 * Unfortunately, some applications really do use rl_point 352 * and rl_line_buffer directly. 353 */ 354 li = el_line(e); 355 /* a cheesy way to get rid of const cast. */ 356 rl_line_buffer = memchr(li->buffer, *li->buffer, 1); 357 _rl_update_pos(); 358 359 if (rl_startup_hook) 360 (*rl_startup_hook)(NULL, 0); 361 362 return (0); 363 } 364 365 366 /* 367 * read one line from input stream and return it, chomping 368 * trailing newline (if there is any) 369 */ 370 char * 371 readline(const char *p) 372 { 373 TYPE(HistEvent) ev; 374 const char * volatile prompt = p; 375 int count; 376 const char *ret; 377 char *buf; 378 static int used_event_hook; 379 380 if (e == NULL || h == NULL) 381 rl_initialize(); 382 383 rl_done = 0; 384 385 (void)setjmp(topbuf); 386 387 /* update prompt accordingly to what has been passed */ 388 if (rl_set_prompt(prompt) == -1) 389 return NULL; 390 391 if (rl_pre_input_hook) 392 (*rl_pre_input_hook)(NULL, 0); 393 394 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 395 el_set(e, EL_GETCFN, _rl_event_read_char); 396 used_event_hook = 1; 397 } 398 399 if (!rl_event_hook && used_event_hook) { 400 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 401 used_event_hook = 0; 402 } 403 404 rl_already_prompted = 0; 405 406 /* get one line from input stream */ 407 ret = el_gets(e, &count); 408 409 if (ret && count > 0) { 410 int lastidx; 411 412 buf = strdup(ret); 413 if (buf == NULL) 414 return NULL; 415 lastidx = count - 1; 416 if (buf[lastidx] == '\n') 417 buf[lastidx] = '\0'; 418 } else 419 buf = NULL; 420 421 FUNW(history)(h, &ev, H_GETSIZE); 422 history_length = ev.num; 423 424 return buf; 425 } 426 427 /* 428 * history functions 429 */ 430 431 /* 432 * is normally called before application starts to use 433 * history expansion functions 434 */ 435 void 436 using_history(void) 437 { 438 if (h == NULL || e == NULL) 439 rl_initialize(); 440 } 441 442 443 /* 444 * substitute ``what'' with ``with'', returning resulting string; if 445 * globally == 1, substitutes all occurrences of what, otherwise only the 446 * first one 447 */ 448 static char * 449 _rl_compat_sub(const char *str, const char *what, const char *with, 450 int globally) 451 { 452 const char *s; 453 char *r, *result; 454 size_t len, with_len, what_len; 455 456 len = strlen(str); 457 with_len = strlen(with); 458 what_len = strlen(what); 459 460 /* calculate length we need for result */ 461 s = str; 462 while (*s) { 463 if (*s == *what && !strncmp(s, what, what_len)) { 464 len += with_len - what_len; 465 if (!globally) 466 break; 467 s += what_len; 468 } else 469 s++; 470 } 471 r = result = malloc(len + 1); 472 if (result == NULL) 473 return NULL; 474 s = str; 475 while (*s) { 476 if (*s == *what && !strncmp(s, what, what_len)) { 477 (void)strncpy(r, with, with_len); 478 r += with_len; 479 s += what_len; 480 if (!globally) { 481 (void)strcpy(r, s); 482 return(result); 483 } 484 } else 485 *r++ = *s++; 486 } 487 *r = '\0'; 488 return(result); 489 } 490 491 static char *last_search_pat; /* last !?pat[?] search pattern */ 492 static char *last_search_match; /* last !?pat[?] that matched */ 493 494 const char * 495 get_history_event(const char *cmd, int *cindex, int qchar) 496 { 497 int idx, sign, sub, num, begin, ret; 498 size_t len; 499 char *pat; 500 const char *rptr; 501 TYPE(HistEvent) ev; 502 503 idx = *cindex; 504 if (cmd[idx++] != history_expansion_char) 505 return(NULL); 506 507 /* find out which event to take */ 508 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 509 if (FUNW(history)(h, &ev, H_FIRST) != 0) 510 return(NULL); 511 *cindex = cmd[idx]? (idx + 1):idx; 512 return ct_encode_string(ev.str, &conv); 513 } 514 sign = 0; 515 if (cmd[idx] == '-') { 516 sign = 1; 517 idx++; 518 } 519 520 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 521 HIST_ENTRY *rl_he; 522 523 num = 0; 524 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 525 num = num * 10 + cmd[idx] - '0'; 526 idx++; 527 } 528 if (sign) 529 num = history_length - num + 1; 530 531 if (!(rl_he = history_get(num))) 532 return(NULL); 533 534 *cindex = idx; 535 return(rl_he->line); 536 } 537 sub = 0; 538 if (cmd[idx] == '?') { 539 sub = 1; 540 idx++; 541 } 542 begin = idx; 543 while (cmd[idx]) { 544 if (cmd[idx] == '\n') 545 break; 546 if (sub && cmd[idx] == '?') 547 break; 548 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 549 || cmd[idx] == '\t' || cmd[idx] == qchar)) 550 break; 551 idx++; 552 } 553 len = idx - begin; 554 if (sub && cmd[idx] == '?') 555 idx++; 556 if (sub && len == 0 && last_search_pat && *last_search_pat) 557 pat = last_search_pat; 558 else if (len == 0) 559 return(NULL); 560 else { 561 if ((pat = malloc(len + 1)) == NULL) 562 return NULL; 563 (void)strncpy(pat, cmd + begin, len); 564 pat[len] = '\0'; 565 } 566 567 if (FUNW(history)(h, &ev, H_CURR) != 0) { 568 if (pat != last_search_pat) 569 free(pat); 570 return (NULL); 571 } 572 num = ev.num; 573 574 if (sub) { 575 if (pat != last_search_pat) { 576 if (last_search_pat) 577 free(last_search_pat); 578 last_search_pat = pat; 579 } 580 ret = history_search(pat, -1); 581 } else 582 ret = history_search_prefix(pat, -1); 583 584 if (ret == -1) { 585 /* restore to end of list on failed search */ 586 FUNW(history)(h, &ev, H_FIRST); 587 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 588 if (pat != last_search_pat) 589 free(pat); 590 return(NULL); 591 } 592 593 if (sub && len) { 594 if (last_search_match && last_search_match != pat) 595 free(last_search_match); 596 last_search_match = pat; 597 } 598 599 if (pat != last_search_pat) 600 free(pat); 601 602 if (FUNW(history)(h, &ev, H_CURR) != 0) 603 return(NULL); 604 *cindex = idx; 605 rptr = ct_encode_string(ev.str, &conv); 606 607 /* roll back to original position */ 608 (void)FUNW(history)(h, &ev, H_SET, num); 609 610 return rptr; 611 } 612 613 /* 614 * the real function doing history expansion - takes as argument command 615 * to do and data upon which the command should be executed 616 * does expansion the way I've understood readline documentation 617 * 618 * returns 0 if data was not modified, 1 if it was and 2 if the string 619 * should be only printed and not executed; in case of error, 620 * returns -1 and *result points to NULL 621 * it's callers responsibility to free() string returned in *result 622 */ 623 static int 624 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 625 char **result) 626 { 627 char *tmp, *search = NULL, *aptr; 628 const char *ptr, *cmd; 629 static char *from = NULL, *to = NULL; 630 int start, end, idx, has_mods = 0; 631 int p_on = 0, g_on = 0; 632 633 *result = NULL; 634 aptr = NULL; 635 ptr = NULL; 636 637 /* First get event specifier */ 638 idx = 0; 639 640 if (strchr(":^*$", command[offs + 1])) { 641 char str[4]; 642 /* 643 * "!:" is shorthand for "!!:". 644 * "!^", "!*" and "!$" are shorthand for 645 * "!!:^", "!!:*" and "!!:$" respectively. 646 */ 647 str[0] = str[1] = '!'; 648 str[2] = '0'; 649 ptr = get_history_event(str, &idx, 0); 650 idx = (command[offs + 1] == ':')? 1:0; 651 has_mods = 1; 652 } else { 653 if (command[offs + 1] == '#') { 654 /* use command so far */ 655 if ((aptr = malloc(offs + 1)) == NULL) 656 return -1; 657 (void)strncpy(aptr, command, offs); 658 aptr[offs] = '\0'; 659 idx = 1; 660 } else { 661 int qchar; 662 663 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 664 ptr = get_history_event(command + offs, &idx, qchar); 665 } 666 has_mods = command[offs + idx] == ':'; 667 } 668 669 if (ptr == NULL && aptr == NULL) 670 return(-1); 671 672 if (!has_mods) { 673 *result = strdup(aptr ? aptr : ptr); 674 if (aptr) 675 free(aptr); 676 if (*result == NULL) 677 return -1; 678 return(1); 679 } 680 681 cmd = command + offs + idx + 1; 682 683 /* Now parse any word designators */ 684 685 if (*cmd == '%') /* last word matched by ?pat? */ 686 tmp = strdup(last_search_match? last_search_match:""); 687 else if (strchr("^*$-0123456789", *cmd)) { 688 start = end = -1; 689 if (*cmd == '^') 690 start = end = 1, cmd++; 691 else if (*cmd == '$') 692 start = -1, cmd++; 693 else if (*cmd == '*') 694 start = 1, cmd++; 695 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 696 start = 0; 697 while (*cmd && '0' <= *cmd && *cmd <= '9') 698 start = start * 10 + *cmd++ - '0'; 699 700 if (*cmd == '-') { 701 if (isdigit((unsigned char) cmd[1])) { 702 cmd++; 703 end = 0; 704 while (*cmd && '0' <= *cmd && *cmd <= '9') 705 end = end * 10 + *cmd++ - '0'; 706 } else if (cmd[1] == '$') { 707 cmd += 2; 708 end = -1; 709 } else { 710 cmd++; 711 end = -2; 712 } 713 } else if (*cmd == '*') 714 end = -1, cmd++; 715 else 716 end = start; 717 } 718 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 719 if (tmp == NULL) { 720 (void)fprintf(rl_outstream, "%s: Bad word specifier", 721 command + offs + idx); 722 if (aptr) 723 free(aptr); 724 return(-1); 725 } 726 } else 727 tmp = strdup(aptr? aptr:ptr); 728 729 if (aptr) 730 free(aptr); 731 732 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 733 *result = tmp; 734 return(1); 735 } 736 737 for (; *cmd; cmd++) { 738 if (*cmd == ':') 739 continue; 740 else if (*cmd == 'h') { /* remove trailing path */ 741 if ((aptr = strrchr(tmp, '/')) != NULL) 742 *aptr = '\0'; 743 } else if (*cmd == 't') { /* remove leading path */ 744 if ((aptr = strrchr(tmp, '/')) != NULL) { 745 aptr = strdup(aptr + 1); 746 free(tmp); 747 tmp = aptr; 748 } 749 } else if (*cmd == 'r') { /* remove trailing suffix */ 750 if ((aptr = strrchr(tmp, '.')) != NULL) 751 *aptr = '\0'; 752 } else if (*cmd == 'e') { /* remove all but suffix */ 753 if ((aptr = strrchr(tmp, '.')) != NULL) { 754 aptr = strdup(aptr); 755 free(tmp); 756 tmp = aptr; 757 } 758 } else if (*cmd == 'p') /* print only */ 759 p_on = 1; 760 else if (*cmd == 'g') 761 g_on = 2; 762 else if (*cmd == 's' || *cmd == '&') { 763 char *what, *with, delim; 764 size_t len, from_len; 765 size_t size; 766 767 if (*cmd == '&' && (from == NULL || to == NULL)) 768 continue; 769 else if (*cmd == 's') { 770 delim = *(++cmd), cmd++; 771 size = 16; 772 what = realloc(from, size); 773 if (what == NULL) { 774 free(from); 775 free(tmp); 776 return 0; 777 } 778 len = 0; 779 for (; *cmd && *cmd != delim; cmd++) { 780 if (*cmd == '\\' && cmd[1] == delim) 781 cmd++; 782 if (len >= size) { 783 char *nwhat; 784 nwhat = realloc(what, 785 (size <<= 1)); 786 if (nwhat == NULL) { 787 free(what); 788 free(tmp); 789 return 0; 790 } 791 what = nwhat; 792 } 793 what[len++] = *cmd; 794 } 795 what[len] = '\0'; 796 from = what; 797 if (*what == '\0') { 798 free(what); 799 if (search) { 800 from = strdup(search); 801 if (from == NULL) { 802 free(tmp); 803 return 0; 804 } 805 } else { 806 from = NULL; 807 free(tmp); 808 return (-1); 809 } 810 } 811 cmd++; /* shift after delim */ 812 if (!*cmd) 813 continue; 814 815 size = 16; 816 with = realloc(to, size); 817 if (with == NULL) { 818 free(to); 819 free(tmp); 820 return -1; 821 } 822 len = 0; 823 from_len = strlen(from); 824 for (; *cmd && *cmd != delim; cmd++) { 825 if (len + from_len + 1 >= size) { 826 char *nwith; 827 size += from_len + 1; 828 nwith = realloc(with, size); 829 if (nwith == NULL) { 830 free(with); 831 free(tmp); 832 return -1; 833 } 834 with = nwith; 835 } 836 if (*cmd == '&') { 837 /* safe */ 838 (void)strcpy(&with[len], from); 839 len += from_len; 840 continue; 841 } 842 if (*cmd == '\\' 843 && (*(cmd + 1) == delim 844 || *(cmd + 1) == '&')) 845 cmd++; 846 with[len++] = *cmd; 847 } 848 with[len] = '\0'; 849 to = with; 850 } 851 852 aptr = _rl_compat_sub(tmp, from, to, g_on); 853 if (aptr) { 854 free(tmp); 855 tmp = aptr; 856 } 857 g_on = 0; 858 } 859 } 860 *result = tmp; 861 return (p_on? 2:1); 862 } 863 864 865 /* 866 * csh-style history expansion 867 */ 868 int 869 history_expand(char *str, char **output) 870 { 871 int ret = 0; 872 size_t idx, i, size; 873 char *tmp, *result; 874 875 if (h == NULL || e == NULL) 876 rl_initialize(); 877 878 if (history_expansion_char == 0) { 879 *output = strdup(str); 880 return(0); 881 } 882 883 *output = NULL; 884 if (str[0] == history_subst_char) { 885 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 886 *output = malloc(strlen(str) + 4 + 1); 887 if (*output == NULL) 888 return 0; 889 (*output)[0] = (*output)[1] = history_expansion_char; 890 (*output)[2] = ':'; 891 (*output)[3] = 's'; 892 (void)strcpy((*output) + 4, str); 893 str = *output; 894 } else { 895 *output = strdup(str); 896 if (*output == NULL) 897 return 0; 898 } 899 900 #define ADD_STRING(what, len, fr) \ 901 { \ 902 if (idx + len + 1 > size) { \ 903 char *nresult = realloc(result, (size += len + 1));\ 904 if (nresult == NULL) { \ 905 free(*output); \ 906 if (/*CONSTCOND*/fr) \ 907 free(tmp); \ 908 return 0; \ 909 } \ 910 result = nresult; \ 911 } \ 912 (void)strncpy(&result[idx], what, len); \ 913 idx += len; \ 914 result[idx] = '\0'; \ 915 } 916 917 result = NULL; 918 size = idx = 0; 919 tmp = NULL; 920 for (i = 0; str[i];) { 921 int qchar, loop_again; 922 size_t len, start, j; 923 924 qchar = 0; 925 loop_again = 1; 926 start = j = i; 927 loop: 928 for (; str[j]; j++) { 929 if (str[j] == '\\' && 930 str[j + 1] == history_expansion_char) { 931 (void)strcpy(&str[j], &str[j + 1]); 932 continue; 933 } 934 if (!loop_again) { 935 if (isspace((unsigned char) str[j]) 936 || str[j] == qchar) 937 break; 938 } 939 if (str[j] == history_expansion_char 940 && !strchr(history_no_expand_chars, str[j + 1]) 941 && (!history_inhibit_expansion_function || 942 (*history_inhibit_expansion_function)(str, 943 (int)j) == 0)) 944 break; 945 } 946 947 if (str[j] && loop_again) { 948 i = j; 949 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 950 j++; 951 if (str[j] == history_expansion_char) 952 j++; 953 loop_again = 0; 954 goto loop; 955 } 956 len = i - start; 957 ADD_STRING(&str[start], len, 0); 958 959 if (str[i] == '\0' || str[i] != history_expansion_char) { 960 len = j - i; 961 ADD_STRING(&str[i], len, 0); 962 if (start == 0) 963 ret = 0; 964 else 965 ret = 1; 966 break; 967 } 968 ret = _history_expand_command (str, i, (j - i), &tmp); 969 if (ret > 0 && tmp) { 970 len = strlen(tmp); 971 ADD_STRING(tmp, len, 1); 972 } 973 if (tmp) { 974 free(tmp); 975 tmp = NULL; 976 } 977 i = j; 978 } 979 980 /* ret is 2 for "print only" option */ 981 if (ret == 2) { 982 add_history(result); 983 #ifdef GDB_411_HACK 984 /* gdb 4.11 has been shipped with readline, where */ 985 /* history_expand() returned -1 when the line */ 986 /* should not be executed; in readline 2.1+ */ 987 /* it should return 2 in such a case */ 988 ret = -1; 989 #endif 990 } 991 free(*output); 992 *output = result; 993 994 return (ret); 995 } 996 997 /* 998 * Return a string consisting of arguments of "str" from "start" to "end". 999 */ 1000 char * 1001 history_arg_extract(int start, int end, const char *str) 1002 { 1003 size_t i, len, max; 1004 char **arr, *result = NULL; 1005 1006 arr = history_tokenize(str); 1007 if (!arr) 1008 return NULL; 1009 if (arr && *arr == NULL) 1010 goto out; 1011 1012 for (max = 0; arr[max]; max++) 1013 continue; 1014 max--; 1015 1016 if (start == '$') 1017 start = (int)max; 1018 if (end == '$') 1019 end = (int)max; 1020 if (end < 0) 1021 end = (int)max + end + 1; 1022 if (start < 0) 1023 start = end; 1024 1025 if (start < 0 || end < 0 || (size_t)start > max || 1026 (size_t)end > max || start > end) 1027 goto out; 1028 1029 for (i = start, len = 0; i <= (size_t)end; i++) 1030 len += strlen(arr[i]) + 1; 1031 len++; 1032 result = malloc(len); 1033 if (result == NULL) 1034 goto out; 1035 1036 for (i = start, len = 0; i <= (size_t)end; i++) { 1037 (void)strcpy(result + len, arr[i]); 1038 len += strlen(arr[i]); 1039 if (i < (size_t)end) 1040 result[len++] = ' '; 1041 } 1042 result[len] = '\0'; 1043 1044 out: 1045 for (i = 0; arr[i]; i++) 1046 free(arr[i]); 1047 free(arr); 1048 1049 return result; 1050 } 1051 1052 /* 1053 * Parse the string into individual tokens, 1054 * similar to how shell would do it. 1055 */ 1056 char ** 1057 history_tokenize(const char *str) 1058 { 1059 int size = 1, idx = 0, i, start; 1060 size_t len; 1061 char **result = NULL, *temp, delim = '\0'; 1062 1063 for (i = 0; str[i];) { 1064 while (isspace((unsigned char) str[i])) 1065 i++; 1066 start = i; 1067 for (; str[i];) { 1068 if (str[i] == '\\') { 1069 if (str[i+1] != '\0') 1070 i++; 1071 } else if (str[i] == delim) 1072 delim = '\0'; 1073 else if (!delim && 1074 (isspace((unsigned char) str[i]) || 1075 strchr("()<>;&|$", str[i]))) 1076 break; 1077 else if (!delim && strchr("'`\"", str[i])) 1078 delim = str[i]; 1079 if (str[i]) 1080 i++; 1081 } 1082 1083 if (idx + 2 >= size) { 1084 char **nresult; 1085 size <<= 1; 1086 nresult = realloc(result, size * sizeof(char *)); 1087 if (nresult == NULL) { 1088 free(result); 1089 return NULL; 1090 } 1091 result = nresult; 1092 } 1093 len = i - start; 1094 temp = malloc(len + 1); 1095 if (temp == NULL) { 1096 for (i = 0; i < idx; i++) 1097 free(result[i]); 1098 free(result); 1099 return NULL; 1100 } 1101 (void)strncpy(temp, &str[start], len); 1102 temp[len] = '\0'; 1103 result[idx++] = temp; 1104 result[idx] = NULL; 1105 if (str[i]) 1106 i++; 1107 } 1108 return (result); 1109 } 1110 1111 1112 /* 1113 * limit size of history record to ``max'' events 1114 */ 1115 void 1116 stifle_history(int max) 1117 { 1118 TYPE(HistEvent) ev; 1119 1120 if (h == NULL || e == NULL) 1121 rl_initialize(); 1122 1123 if (FUNW(history)(h, &ev, H_SETSIZE, max) == 0) 1124 max_input_history = max; 1125 } 1126 1127 1128 /* 1129 * "unlimit" size of history - set the limit to maximum allowed int value 1130 */ 1131 int 1132 unstifle_history(void) 1133 { 1134 TYPE(HistEvent) ev; 1135 int omax; 1136 1137 FUNW(history)(h, &ev, H_SETSIZE, INT_MAX); 1138 omax = max_input_history; 1139 max_input_history = INT_MAX; 1140 return (omax); /* some value _must_ be returned */ 1141 } 1142 1143 1144 int 1145 history_is_stifled(void) 1146 { 1147 1148 /* cannot return true answer */ 1149 return (max_input_history != INT_MAX); 1150 } 1151 1152 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1153 1154 int 1155 history_truncate_file (const char *filename, int nlines) 1156 { 1157 int ret = 0; 1158 FILE *fp, *tp; 1159 char template[sizeof(_history_tmp_template)]; 1160 char buf[4096]; 1161 int fd; 1162 char *cp; 1163 off_t off; 1164 int count = 0; 1165 ssize_t left = 0; 1166 1167 if (filename == NULL && (filename = _default_history_file()) == NULL) 1168 return errno; 1169 if ((fp = fopen(filename, "r+")) == NULL) 1170 return errno; 1171 strcpy(template, _history_tmp_template); 1172 if ((fd = mkstemp(template)) == -1) { 1173 ret = errno; 1174 goto out1; 1175 } 1176 1177 if ((tp = fdopen(fd, "r+")) == NULL) { 1178 close(fd); 1179 ret = errno; 1180 goto out2; 1181 } 1182 1183 for(;;) { 1184 if (fread(buf, sizeof(buf), 1, fp) != 1) { 1185 if (ferror(fp)) { 1186 ret = errno; 1187 break; 1188 } 1189 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1190 (off_t)-1) { 1191 ret = errno; 1192 break; 1193 } 1194 left = fread(buf, 1, sizeof(buf), fp); 1195 if (ferror(fp)) { 1196 ret = errno; 1197 break; 1198 } 1199 if (left == 0) { 1200 count--; 1201 left = sizeof(buf); 1202 } else if (fwrite(buf, (size_t)left, 1, tp) != 1) { 1203 ret = errno; 1204 break; 1205 } 1206 fflush(tp); 1207 break; 1208 } 1209 if (fwrite(buf, sizeof(buf), 1, tp) != 1) { 1210 ret = errno; 1211 break; 1212 } 1213 count++; 1214 } 1215 if (ret) 1216 goto out3; 1217 cp = buf + left - 1; 1218 if(*cp != '\n') 1219 cp++; 1220 for(;;) { 1221 while (--cp >= buf) { 1222 if (*cp == '\n') { 1223 if (--nlines == 0) { 1224 if (++cp >= buf + sizeof(buf)) { 1225 count++; 1226 cp = buf; 1227 } 1228 break; 1229 } 1230 } 1231 } 1232 if (nlines <= 0 || count == 0) 1233 break; 1234 count--; 1235 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1236 ret = errno; 1237 break; 1238 } 1239 if (fread(buf, sizeof(buf), 1, tp) != 1) { 1240 if (ferror(tp)) { 1241 ret = errno; 1242 break; 1243 } 1244 ret = EAGAIN; 1245 break; 1246 } 1247 cp = buf + sizeof(buf); 1248 } 1249 1250 if (ret || nlines > 0) 1251 goto out3; 1252 1253 if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) { 1254 ret = errno; 1255 goto out3; 1256 } 1257 1258 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1259 (off_t)-1) { 1260 ret = errno; 1261 goto out3; 1262 } 1263 1264 for(;;) { 1265 if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) { 1266 if (ferror(fp)) 1267 ret = errno; 1268 break; 1269 } 1270 if (fwrite(buf, (size_t)left, 1, fp) != 1) { 1271 ret = errno; 1272 break; 1273 } 1274 } 1275 fflush(fp); 1276 if((off = ftello(fp)) > 0) 1277 (void)ftruncate(fileno(fp), off); 1278 out3: 1279 fclose(tp); 1280 out2: 1281 unlink(template); 1282 out1: 1283 fclose(fp); 1284 1285 return ret; 1286 } 1287 1288 1289 /* 1290 * read history from a file given 1291 */ 1292 int 1293 read_history(const char *filename) 1294 { 1295 TYPE(HistEvent) ev; 1296 1297 if (h == NULL || e == NULL) 1298 rl_initialize(); 1299 if (filename == NULL && (filename = _default_history_file()) == NULL) 1300 return errno; 1301 return (FUNW(history)(h, &ev, H_LOAD, filename) == -1 ? 1302 (errno ? errno : EINVAL) : 0); 1303 } 1304 1305 1306 /* 1307 * write history to a file given 1308 */ 1309 int 1310 write_history(const char *filename) 1311 { 1312 TYPE(HistEvent) ev; 1313 1314 if (h == NULL || e == NULL) 1315 rl_initialize(); 1316 if (filename == NULL && (filename = _default_history_file()) == NULL) 1317 return errno; 1318 return (FUNW(history)(h, &ev, H_SAVE, filename) == -1 ? 1319 (errno ? errno : EINVAL) : 0); 1320 } 1321 1322 1323 /* 1324 * returns history ``num''th event 1325 * 1326 * returned pointer points to static variable 1327 */ 1328 HIST_ENTRY * 1329 history_get(int num) 1330 { 1331 static HIST_ENTRY she; 1332 TYPE(HistEvent) ev; 1333 int curr_num; 1334 1335 if (h == NULL || e == NULL) 1336 rl_initialize(); 1337 1338 /* save current position */ 1339 if (FUNW(history)(h, &ev, H_CURR) != 0) 1340 return (NULL); 1341 curr_num = ev.num; 1342 1343 /* start from the oldest */ 1344 if (FUNW(history)(h, &ev, H_LAST) != 0) 1345 return (NULL); /* error */ 1346 1347 /* look forwards for event matching specified offset */ 1348 if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1349 return (NULL); 1350 1351 she.line = ct_encode_string(ev.str, &conv); 1352 1353 /* restore pointer to where it was */ 1354 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1355 1356 return (&she); 1357 } 1358 1359 1360 /* 1361 * add the line to history table 1362 */ 1363 int 1364 add_history(const char *line) 1365 { 1366 TYPE(HistEvent) ev; 1367 1368 if (h == NULL || e == NULL) 1369 rl_initialize(); 1370 1371 (void)FUNW(history)(h, &ev, H_ENTER, line); 1372 if (FUNW(history)(h, &ev, H_GETSIZE) == 0) 1373 history_length = ev.num; 1374 1375 return (!(history_length > 0)); /* return 0 if all is okay */ 1376 } 1377 1378 1379 /* 1380 * remove the specified entry from the history list and return it. 1381 */ 1382 HIST_ENTRY * 1383 remove_history(int num) 1384 { 1385 HIST_ENTRY *he; 1386 TYPE(HistEvent) ev; 1387 1388 if (h == NULL || e == NULL) 1389 rl_initialize(); 1390 1391 if ((he = malloc(sizeof(*he))) == NULL) 1392 return NULL; 1393 1394 if (FUNW(history)(h, &ev, H_DELDATA, num, &he->data) != 0) { 1395 free(he); 1396 return NULL; 1397 } 1398 1399 he->line = ct_encode_string(ev.str, &conv); 1400 if (FUNW(history)(h, &ev, H_GETSIZE) == 0) 1401 history_length = ev.num; 1402 1403 return he; 1404 } 1405 1406 1407 /* 1408 * replace the line and data of the num-th entry 1409 */ 1410 HIST_ENTRY * 1411 replace_history_entry(int num, const char *line, histdata_t data) 1412 { 1413 HIST_ENTRY *he; 1414 TYPE(HistEvent) ev; 1415 int curr_num; 1416 1417 if (h == NULL || e == NULL) 1418 rl_initialize(); 1419 1420 /* save current position */ 1421 if (FUNW(history)(h, &ev, H_CURR) != 0) 1422 return NULL; 1423 curr_num = ev.num; 1424 1425 /* start from the oldest */ 1426 if (FUNW(history)(h, &ev, H_LAST) != 0) 1427 return NULL; /* error */ 1428 1429 if ((he = malloc(sizeof(*he))) == NULL) 1430 return NULL; 1431 1432 /* look forwards for event matching specified offset */ 1433 if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1434 goto out; 1435 1436 he->line = strdup(ct_encode_string(ev.str, &e->el_scratch)); 1437 if (he->line == NULL) 1438 goto out; 1439 1440 if (FUNW(history)(h, &ev, H_REPLACE, line, data)) 1441 goto out; 1442 1443 /* restore pointer to where it was */ 1444 if (FUNW(history)(h, &ev, H_SET, curr_num)) 1445 goto out; 1446 1447 return he; 1448 out: 1449 free(he); 1450 return NULL; 1451 } 1452 1453 /* 1454 * clear the history list - delete all entries 1455 */ 1456 void 1457 clear_history(void) 1458 { 1459 TYPE(HistEvent) ev; 1460 1461 (void)FUNW(history)(h, &ev, H_CLEAR); 1462 history_length = 0; 1463 } 1464 1465 1466 /* 1467 * returns offset of the current history event 1468 */ 1469 int 1470 where_history(void) 1471 { 1472 TYPE(HistEvent) ev; 1473 int curr_num, off; 1474 1475 if (FUNW(history)(h, &ev, H_CURR) != 0) 1476 return (0); 1477 curr_num = ev.num; 1478 1479 (void)FUNW(history)(h, &ev, H_FIRST); 1480 off = 1; 1481 while (ev.num != curr_num && FUNW(history)(h, &ev, H_NEXT) == 0) 1482 off++; 1483 1484 return (off); 1485 } 1486 1487 1488 /* 1489 * returns current history event or NULL if there is no such event 1490 */ 1491 HIST_ENTRY * 1492 current_history(void) 1493 { 1494 1495 return (_move_history(H_CURR)); 1496 } 1497 1498 1499 /* 1500 * returns total number of bytes history events' data are using 1501 */ 1502 int 1503 history_total_bytes(void) 1504 { 1505 TYPE(HistEvent) ev; 1506 int curr_num; 1507 size_t size; 1508 1509 if (FUNW(history)(h, &ev, H_CURR) != 0) 1510 return (-1); 1511 curr_num = ev.num; 1512 1513 (void)FUNW(history)(h, &ev, H_FIRST); 1514 size = 0; 1515 do 1516 size += Strlen(ev.str) * sizeof(*ev.str); 1517 while (FUNW(history)(h, &ev, H_NEXT) == 0); 1518 1519 /* get to the same position as before */ 1520 FUNW(history)(h, &ev, H_PREV_EVENT, curr_num); 1521 1522 return (int)(size); 1523 } 1524 1525 1526 /* 1527 * sets the position in the history list to ``pos'' 1528 */ 1529 int 1530 history_set_pos(int pos) 1531 { 1532 TYPE(HistEvent) ev; 1533 int curr_num; 1534 1535 if (pos >= history_length || pos < 0) 1536 return (-1); 1537 1538 (void)FUNW(history)(h, &ev, H_CURR); 1539 curr_num = ev.num; 1540 1541 /* 1542 * use H_DELDATA to set to nth history (without delete) by passing 1543 * (void **)-1 1544 */ 1545 if (FUNW(history)(h, &ev, H_DELDATA, pos, (void **)-1)) { 1546 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1547 return(-1); 1548 } 1549 return (0); 1550 } 1551 1552 1553 /* 1554 * returns previous event in history and shifts pointer accordingly 1555 */ 1556 HIST_ENTRY * 1557 previous_history(void) 1558 { 1559 1560 return (_move_history(H_PREV)); 1561 } 1562 1563 1564 /* 1565 * returns next event in history and shifts pointer accordingly 1566 */ 1567 HIST_ENTRY * 1568 next_history(void) 1569 { 1570 1571 return (_move_history(H_NEXT)); 1572 } 1573 1574 1575 /* 1576 * searches for first history event containing the str 1577 */ 1578 int 1579 history_search(const char *str, int direction) 1580 { 1581 TYPE(HistEvent) ev; 1582 const Char *strp; 1583 const Char *wstr; 1584 int curr_num; 1585 1586 if (FUNW(history)(h, &ev, H_CURR) != 0) 1587 return (-1); 1588 curr_num = ev.num; 1589 1590 wstr = ct_decode_string(str, &conv); 1591 for (;;) { 1592 if ((strp = Strstr(ev.str, wstr)) != NULL) 1593 return (int) (strp - ev.str); 1594 if (FUNW(history)(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1595 break; 1596 } 1597 (void)FUNW(history)(h, &ev, H_SET, curr_num); 1598 return (-1); 1599 } 1600 1601 1602 /* 1603 * searches for first history event beginning with str 1604 */ 1605 int 1606 history_search_prefix(const char *str, int direction) 1607 { 1608 TYPE(HistEvent) ev; 1609 1610 return (FUNW(history)(h, &ev, direction < 0 ? 1611 H_PREV_STR : H_NEXT_STR, str)); 1612 } 1613 1614 1615 /* 1616 * search for event in history containing str, starting at offset 1617 * abs(pos); continue backward, if pos<0, forward otherwise 1618 */ 1619 /* ARGSUSED */ 1620 int 1621 history_search_pos(const char *str, 1622 int direction __attribute__((__unused__)), int pos) 1623 { 1624 TYPE(HistEvent) ev; 1625 int curr_num, off; 1626 const Char *wstr; 1627 1628 off = (pos > 0) ? pos : -pos; 1629 pos = (pos > 0) ? 1 : -1; 1630 1631 if (FUNW(history)(h, &ev, H_CURR) != 0) 1632 return (-1); 1633 curr_num = ev.num; 1634 1635 if (history_set_pos(off) != 0 || FUNW(history)(h, &ev, H_CURR) != 0) 1636 return (-1); 1637 1638 wstr = ct_decode_string(str, &conv); 1639 for (;;) { 1640 if (Strstr(ev.str, wstr)) 1641 return (off); 1642 if (FUNW(history)(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1643 break; 1644 } 1645 1646 /* set "current" pointer back to previous state */ 1647 (void)FUNW(history)(h, &ev, 1648 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1649 1650 return (-1); 1651 } 1652 1653 1654 /********************************/ 1655 /* completion functions */ 1656 1657 char * 1658 tilde_expand(char *name) 1659 { 1660 return fn_tilde_expand(name); 1661 } 1662 1663 char * 1664 filename_completion_function(const char *name, int state) 1665 { 1666 return fn_filename_completion_function(name, state); 1667 } 1668 1669 /* 1670 * a completion generator for usernames; returns _first_ username 1671 * which starts with supplied text 1672 * text contains a partial username preceded by random character 1673 * (usually '~'); state is ignored 1674 * it's callers responsibility to free returned value 1675 */ 1676 char * 1677 username_completion_function(const char *text, int state) 1678 { 1679 struct passwd *pwd, pwres; 1680 char pwbuf[1024]; 1681 1682 if (text[0] == '\0') 1683 return (NULL); 1684 1685 if (*text == '~') 1686 text++; 1687 1688 if (state == 0) 1689 setpwent(); 1690 1691 while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0 1692 && pwd != NULL && text[0] == pwd->pw_name[0] 1693 && strcmp(text, pwd->pw_name) == 0); 1694 1695 if (pwd == NULL) { 1696 endpwent(); 1697 return NULL; 1698 } 1699 return strdup(pwd->pw_name); 1700 } 1701 1702 1703 /* 1704 * el-compatible wrapper to send TSTP on ^Z 1705 */ 1706 /* ARGSUSED */ 1707 static unsigned char 1708 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1709 { 1710 (void)kill(0, SIGTSTP); 1711 return CC_NORM; 1712 } 1713 1714 /* 1715 * Display list of strings in columnar format on readline's output stream. 1716 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1717 * 'max' is maximum length of string in 'matches'. 1718 */ 1719 void 1720 rl_display_match_list(char **matches, int len, int max) 1721 { 1722 1723 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1724 } 1725 1726 static const char * 1727 /*ARGSUSED*/ 1728 _rl_completion_append_character_function(const char *dummy 1729 __attribute__((__unused__))) 1730 { 1731 static char buf[2]; 1732 buf[0] = rl_completion_append_character; 1733 buf[1] = '\0'; 1734 return buf; 1735 } 1736 1737 1738 /* 1739 * complete word at current point 1740 */ 1741 /* ARGSUSED */ 1742 int 1743 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1744 { 1745 #ifdef WIDECHAR 1746 static ct_buffer_t wbreak_conv, sprefix_conv; 1747 #endif 1748 1749 if (h == NULL || e == NULL) 1750 rl_initialize(); 1751 1752 if (rl_inhibit_completion) { 1753 char arr[2]; 1754 arr[0] = (char)invoking_key; 1755 arr[1] = '\0'; 1756 el_insertstr(e, arr); 1757 return (CC_REFRESH); 1758 } 1759 1760 /* Just look at how many global variables modify this operation! */ 1761 return fn_complete(e, 1762 (CPFunction *)rl_completion_entry_function, 1763 rl_attempted_completion_function, 1764 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1765 ct_decode_string(rl_special_prefixes, &sprefix_conv), 1766 _rl_completion_append_character_function, 1767 (size_t)rl_completion_query_items, 1768 &rl_completion_type, &rl_attempted_completion_over, 1769 &rl_point, &rl_end); 1770 } 1771 1772 1773 /* ARGSUSED */ 1774 static unsigned char 1775 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1776 { 1777 return (unsigned char)rl_complete(0, ch); 1778 } 1779 1780 /* 1781 * misc other functions 1782 */ 1783 1784 /* 1785 * bind key c to readline-type function func 1786 */ 1787 int 1788 rl_bind_key(int c, rl_command_func_t *func) 1789 { 1790 int retval = -1; 1791 1792 if (h == NULL || e == NULL) 1793 rl_initialize(); 1794 1795 if (func == rl_insert) { 1796 /* XXX notice there is no range checking of ``c'' */ 1797 e->el_map.key[c] = ED_INSERT; 1798 retval = 0; 1799 } 1800 return (retval); 1801 } 1802 1803 1804 /* 1805 * read one key from input - handles chars pushed back 1806 * to input stream also 1807 */ 1808 int 1809 rl_read_key(void) 1810 { 1811 char fooarr[2 * sizeof(int)]; 1812 1813 if (e == NULL || h == NULL) 1814 rl_initialize(); 1815 1816 return (el_getc(e, fooarr)); 1817 } 1818 1819 1820 /* 1821 * reset the terminal 1822 */ 1823 /* ARGSUSED */ 1824 void 1825 rl_reset_terminal(const char *p __attribute__((__unused__))) 1826 { 1827 1828 if (h == NULL || e == NULL) 1829 rl_initialize(); 1830 el_reset(e); 1831 } 1832 1833 1834 /* 1835 * insert character ``c'' back into input stream, ``count'' times 1836 */ 1837 int 1838 rl_insert(int count, int c) 1839 { 1840 char arr[2]; 1841 1842 if (h == NULL || e == NULL) 1843 rl_initialize(); 1844 1845 /* XXX - int -> char conversion can lose on multichars */ 1846 arr[0] = c; 1847 arr[1] = '\0'; 1848 1849 for (; count > 0; count--) 1850 el_push(e, arr); 1851 1852 return (0); 1853 } 1854 1855 int 1856 rl_insert_text(const char *text) 1857 { 1858 if (!text || *text == 0) 1859 return (0); 1860 1861 if (h == NULL || e == NULL) 1862 rl_initialize(); 1863 1864 if (el_insertstr(e, text) < 0) 1865 return (0); 1866 return (int)strlen(text); 1867 } 1868 1869 /*ARGSUSED*/ 1870 int 1871 rl_newline(int count, int c) 1872 { 1873 /* 1874 * Readline-4.0 appears to ignore the args. 1875 */ 1876 return rl_insert(1, '\n'); 1877 } 1878 1879 /*ARGSUSED*/ 1880 static unsigned char 1881 rl_bind_wrapper(EditLine *el, unsigned char c) 1882 { 1883 if (map[c] == NULL) 1884 return CC_ERROR; 1885 1886 _rl_update_pos(); 1887 1888 (*map[c])(NULL, c); 1889 1890 /* If rl_done was set by the above call, deal with it here */ 1891 if (rl_done) 1892 return CC_EOF; 1893 1894 return CC_NORM; 1895 } 1896 1897 int 1898 rl_add_defun(const char *name, Function *fun, int c) 1899 { 1900 char dest[8]; 1901 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1902 return -1; 1903 map[(unsigned char)c] = fun; 1904 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1905 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1906 el_set(e, EL_BIND, dest, name); 1907 return 0; 1908 } 1909 1910 void 1911 rl_callback_read_char() 1912 { 1913 int count = 0, done = 0; 1914 const char *buf = el_gets(e, &count); 1915 char *wbuf; 1916 1917 if (buf == NULL || count-- <= 0) 1918 return; 1919 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1920 done = 1; 1921 if (buf[count] == '\n' || buf[count] == '\r') 1922 done = 2; 1923 1924 if (done && rl_linefunc != NULL) { 1925 el_set(e, EL_UNBUFFERED, 0); 1926 if (done == 2) { 1927 if ((wbuf = strdup(buf)) != NULL) 1928 wbuf[count] = '\0'; 1929 } else 1930 wbuf = NULL; 1931 (*(void (*)(const char *))rl_linefunc)(wbuf); 1932 //el_set(e, EL_UNBUFFERED, 1); 1933 } 1934 } 1935 1936 void 1937 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1938 { 1939 if (e == NULL) { 1940 rl_initialize(); 1941 } 1942 (void)rl_set_prompt(prompt); 1943 rl_linefunc = linefunc; 1944 el_set(e, EL_UNBUFFERED, 1); 1945 } 1946 1947 void 1948 rl_callback_handler_remove(void) 1949 { 1950 el_set(e, EL_UNBUFFERED, 0); 1951 rl_linefunc = NULL; 1952 } 1953 1954 void 1955 rl_redisplay(void) 1956 { 1957 char a[2]; 1958 a[0] = e->el_tty.t_c[TS_IO][C_REPRINT]; 1959 a[1] = '\0'; 1960 el_push(e, a); 1961 } 1962 1963 int 1964 rl_get_previous_history(int count, int key) 1965 { 1966 char a[2]; 1967 a[0] = key; 1968 a[1] = '\0'; 1969 while (count--) 1970 el_push(e, a); 1971 return 0; 1972 } 1973 1974 void 1975 /*ARGSUSED*/ 1976 rl_prep_terminal(int meta_flag) 1977 { 1978 el_set(e, EL_PREP_TERM, 1); 1979 } 1980 1981 void 1982 rl_deprep_terminal(void) 1983 { 1984 el_set(e, EL_PREP_TERM, 0); 1985 } 1986 1987 int 1988 rl_read_init_file(const char *s) 1989 { 1990 return(el_source(e, s)); 1991 } 1992 1993 int 1994 rl_parse_and_bind(const char *line) 1995 { 1996 const char **argv; 1997 int argc; 1998 Tokenizer *tok; 1999 2000 tok = tok_init(NULL); 2001 tok_str(tok, line, &argc, &argv); 2002 argc = el_parse(e, argc, argv); 2003 tok_end(tok); 2004 return (argc ? 1 : 0); 2005 } 2006 2007 int 2008 rl_variable_bind(const char *var, const char *value) 2009 { 2010 /* 2011 * The proper return value is undocument, but this is what the 2012 * readline source seems to do. 2013 */ 2014 return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0); 2015 } 2016 2017 void 2018 rl_stuff_char(int c) 2019 { 2020 char buf[2]; 2021 2022 buf[0] = c; 2023 buf[1] = '\0'; 2024 el_insertstr(e, buf); 2025 } 2026 2027 static int 2028 _rl_event_read_char(EditLine *el, char *cp) 2029 { 2030 int n; 2031 ssize_t num_read = 0; 2032 2033 *cp = '\0'; 2034 while (rl_event_hook) { 2035 2036 (*rl_event_hook)(); 2037 2038 #if defined(FIONREAD) 2039 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2040 return(-1); 2041 if (n) 2042 num_read = read(el->el_infd, cp, 1); 2043 else 2044 num_read = 0; 2045 #elif defined(F_SETFL) && defined(O_NDELAY) 2046 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2047 return(-1); 2048 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2049 return(-1); 2050 num_read = read(el->el_infd, cp, 1); 2051 if (fcntl(el->el_infd, F_SETFL, n)) 2052 return(-1); 2053 #else 2054 /* not non-blocking, but what you gonna do? */ 2055 num_read = read(el->el_infd, cp, 1); 2056 return(-1); 2057 #endif 2058 2059 if (num_read < 0 && errno == EAGAIN) 2060 continue; 2061 if (num_read == 0) 2062 continue; 2063 break; 2064 } 2065 if (!rl_event_hook) 2066 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2067 return (int)num_read; 2068 } 2069 2070 static void 2071 _rl_update_pos(void) 2072 { 2073 const LineInfo *li = el_line(e); 2074 2075 rl_point = (int)(li->cursor - li->buffer); 2076 rl_end = (int)(li->lastchar - li->buffer); 2077 } 2078 2079 void 2080 rl_get_screen_size(int *rows, int *cols) 2081 { 2082 if (rows) 2083 el_get(e, EL_GETTC, "li", rows); 2084 if (cols) 2085 el_get(e, EL_GETTC, "co", cols); 2086 } 2087 2088 void 2089 rl_set_screen_size(int rows, int cols) 2090 { 2091 char buf[64]; 2092 (void)snprintf(buf, sizeof(buf), "%d", rows); 2093 el_set(e, EL_SETTC, "li", buf); 2094 (void)snprintf(buf, sizeof(buf), "%d", cols); 2095 el_set(e, EL_SETTC, "co", buf); 2096 } 2097 2098 char ** 2099 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2100 { 2101 size_t len, max, i, j, min; 2102 char **list, *match, *a, *b; 2103 2104 len = 1; 2105 max = 10; 2106 if ((list = malloc(max * sizeof(*list))) == NULL) 2107 return NULL; 2108 2109 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2110 list[len++] = match; 2111 if (len == max) { 2112 char **nl; 2113 max += 10; 2114 if ((nl = realloc(list, max * sizeof(*nl))) == NULL) 2115 goto out; 2116 list = nl; 2117 } 2118 } 2119 if (len == 1) 2120 goto out; 2121 list[len] = NULL; 2122 if (len == 2) { 2123 if ((list[0] = strdup(list[1])) == NULL) 2124 goto out; 2125 return list; 2126 } 2127 qsort(&list[1], len - 1, sizeof(*list), 2128 (int (*)(const void *, const void *)) strcmp); 2129 min = SIZE_T_MAX; 2130 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2131 b = list[i + 1]; 2132 for (j = 0; a[j] && a[j] == b[j]; j++) 2133 continue; 2134 if (min > j) 2135 min = j; 2136 } 2137 if (min == 0 && *str) { 2138 if ((list[0] = strdup(str)) == NULL) 2139 goto out; 2140 } else { 2141 if ((list[0] = malloc(min + 1)) == NULL) 2142 goto out; 2143 (void)memcpy(list[0], list[1], min); 2144 list[0][min] = '\0'; 2145 } 2146 return list; 2147 2148 out: 2149 free(list); 2150 return NULL; 2151 } 2152 2153 char * 2154 rl_filename_completion_function (const char *text, int state) 2155 { 2156 return fn_filename_completion_function(text, state); 2157 } 2158 2159 void 2160 rl_forced_update_display(void) 2161 { 2162 el_set(e, EL_REFRESH); 2163 } 2164 2165 int 2166 _rl_abort_internal(void) 2167 { 2168 el_beep(e); 2169 longjmp(topbuf, 1); 2170 /*NOTREACHED*/ 2171 } 2172 2173 int 2174 _rl_qsort_string_compare(char **s1, char **s2) 2175 { 2176 return strcoll(*s1, *s2); 2177 } 2178 2179 HISTORY_STATE * 2180 history_get_history_state(void) 2181 { 2182 HISTORY_STATE *hs; 2183 2184 if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL) 2185 return (NULL); 2186 hs->length = history_length; 2187 return (hs); 2188 } 2189 2190 int 2191 /*ARGSUSED*/ 2192 rl_kill_text(int from, int to) 2193 { 2194 return 0; 2195 } 2196 2197 Keymap 2198 rl_make_bare_keymap(void) 2199 { 2200 return NULL; 2201 } 2202 2203 Keymap 2204 rl_get_keymap(void) 2205 { 2206 return NULL; 2207 } 2208 2209 void 2210 /*ARGSUSED*/ 2211 rl_set_keymap(Keymap k) 2212 { 2213 } 2214 2215 int 2216 /*ARGSUSED*/ 2217 rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k) 2218 { 2219 return 0; 2220 } 2221 2222 int 2223 /*ARGSUSED*/ 2224 rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k) 2225 { 2226 return 0; 2227 } 2228 2229 /* unsupported, but needed by python */ 2230 void 2231 rl_cleanup_after_signal(void) 2232 { 2233 } 2234