1 /* $NetBSD: readline.c,v 1.110 2014/01/21 13:51:44 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 1.110 2014/01/21 13:51:44 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #include <vis.h> 51 52 #include "editline/readline.h" 53 #include "el.h" 54 #include "fcns.h" /* for EL_NUM_FCNS */ 55 #include "histedit.h" 56 #include "filecomplete.h" 57 58 #if !defined(SIZE_T_MAX) 59 # define SIZE_T_MAX (size_t)(-1) 60 #endif 61 62 void rl_prep_terminal(int); 63 void rl_deprep_terminal(void); 64 65 /* for rl_complete() */ 66 #define TAB '\r' 67 68 /* see comment at the #ifdef for sense of this */ 69 /* #define GDB_411_HACK */ 70 71 /* readline compatibility stuff - look at readline sources/documentation */ 72 /* to see what these variables mean */ 73 const char *rl_library_version = "EditLine wrapper"; 74 int rl_readline_version = RL_READLINE_VERSION; 75 static char empty[] = { '\0' }; 76 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 77 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 78 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 79 char *rl_readline_name = empty; 80 FILE *rl_instream = NULL; 81 FILE *rl_outstream = NULL; 82 int rl_point = 0; 83 int rl_end = 0; 84 char *rl_line_buffer = NULL; 85 VCPFunction *rl_linefunc = NULL; 86 int rl_done = 0; 87 VFunction *rl_event_hook = NULL; 88 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 89 emacs_meta_keymap, 90 emacs_ctlx_keymap; 91 /* 92 * The following is not implemented; we always catch signals in the 93 * libedit fashion: set handlers on entry to el_gets() and clear them 94 * on the way out. This simplistic approach works for most cases; if 95 * it does not work for your application, please let us know. 96 */ 97 int rl_catch_signals = 1; 98 int rl_catch_sigwinch = 1; 99 100 int history_base = 1; /* probably never subject to change */ 101 int history_length = 0; 102 int max_input_history = 0; 103 char history_expansion_char = '!'; 104 char history_subst_char = '^'; 105 char *history_no_expand_chars = expand_chars; 106 Function *history_inhibit_expansion_function = NULL; 107 char *history_arg_extract(int start, int end, const char *str); 108 109 int rl_inhibit_completion = 0; 110 int rl_attempted_completion_over = 0; 111 char *rl_basic_word_break_characters = break_chars; 112 char *rl_completer_word_break_characters = NULL; 113 char *rl_completer_quote_characters = NULL; 114 Function *rl_completion_entry_function = NULL; 115 char *(*rl_completion_word_break_hook)(void) = NULL; 116 CPPFunction *rl_attempted_completion_function = NULL; 117 Function *rl_pre_input_hook = NULL; 118 Function *rl_startup1_hook = NULL; 119 int (*rl_getc_function)(FILE *) = NULL; 120 char *rl_terminal_name = NULL; 121 int rl_already_prompted = 0; 122 int rl_filename_completion_desired = 0; 123 int rl_ignore_completion_duplicates = 0; 124 int readline_echoing_p = 1; 125 int _rl_print_completions_horizontally = 0; 126 VFunction *rl_redisplay_function = NULL; 127 Function *rl_startup_hook = NULL; 128 VFunction *rl_completion_display_matches_hook = NULL; 129 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 130 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 131 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 132 133 /* 134 * The current prompt string. 135 */ 136 char *rl_prompt = NULL; 137 /* 138 * This is set to character indicating type of completion being done by 139 * rl_complete_internal(); this is available for application completion 140 * functions. 141 */ 142 int rl_completion_type = 0; 143 144 /* 145 * If more than this number of items results from query for possible 146 * completions, we ask user if they are sure to really display the list. 147 */ 148 int rl_completion_query_items = 100; 149 150 /* 151 * List of characters which are word break characters, but should be left 152 * in the parsed text when it is passed to the completion function. 153 * Shell uses this to help determine what kind of completing to do. 154 */ 155 char *rl_special_prefixes = NULL; 156 157 /* 158 * This is the character appended to the completed words if at the end of 159 * the line. Default is ' ' (a space). 160 */ 161 int rl_completion_append_character = ' '; 162 163 /* stuff below is used internally by libedit for readline emulation */ 164 165 static History *h = NULL; 166 static EditLine *e = NULL; 167 static Function *map[256]; 168 static jmp_buf topbuf; 169 170 /* internal functions */ 171 static unsigned char _el_rl_complete(EditLine *, int); 172 static unsigned char _el_rl_tstp(EditLine *, int); 173 static char *_get_prompt(EditLine *); 174 static int _getc_function(EditLine *, char *); 175 static HIST_ENTRY *_move_history(int); 176 static int _history_expand_command(const char *, size_t, size_t, 177 char **); 178 static char *_rl_compat_sub(const char *, const char *, 179 const char *, int); 180 static int _rl_event_read_char(EditLine *, char *); 181 static void _rl_update_pos(void); 182 183 184 /* ARGSUSED */ 185 static char * 186 _get_prompt(EditLine *el __attribute__((__unused__))) 187 { 188 rl_already_prompted = 1; 189 return rl_prompt; 190 } 191 192 193 /* 194 * generic function for moving around history 195 */ 196 static HIST_ENTRY * 197 _move_history(int op) 198 { 199 HistEvent ev; 200 static HIST_ENTRY rl_he; 201 202 if (history(h, &ev, op) != 0) 203 return NULL; 204 205 rl_he.line = ev.str; 206 rl_he.data = NULL; 207 208 return &rl_he; 209 } 210 211 212 /* 213 * read one key from user defined input function 214 */ 215 static int 216 /*ARGSUSED*/ 217 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 218 { 219 int i; 220 221 i = (*rl_getc_function)(NULL); 222 if (i == -1) 223 return 0; 224 *c = (char)i; 225 return 1; 226 } 227 228 static void 229 _resize_fun(EditLine *el, void *a) 230 { 231 const LineInfo *li; 232 char **ap = a; 233 234 li = el_line(el); 235 /* a cheesy way to get rid of const cast. */ 236 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 237 } 238 239 static const char * 240 _default_history_file(void) 241 { 242 struct passwd *p; 243 static char *path; 244 size_t len; 245 246 if (path) 247 return path; 248 249 if ((p = getpwuid(getuid())) == NULL) 250 return NULL; 251 252 len = strlen(p->pw_dir) + sizeof("/.history"); 253 if ((path = malloc(len)) == NULL) 254 return NULL; 255 256 (void)snprintf(path, len, "%s/.history", p->pw_dir); 257 return path; 258 } 259 260 /* 261 * READLINE compatibility stuff 262 */ 263 264 /* 265 * Set the prompt 266 */ 267 int 268 rl_set_prompt(const char *prompt) 269 { 270 char *p; 271 272 if (!prompt) 273 prompt = ""; 274 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 275 return 0; 276 if (rl_prompt) 277 el_free(rl_prompt); 278 rl_prompt = strdup(prompt); 279 if (rl_prompt == NULL) 280 return -1; 281 282 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 283 *p = RL_PROMPT_START_IGNORE; 284 285 return 0; 286 } 287 288 /* 289 * initialize rl compat stuff 290 */ 291 int 292 rl_initialize(void) 293 { 294 HistEvent ev; 295 int editmode = 1; 296 struct termios t; 297 298 if (e != NULL) 299 el_end(e); 300 if (h != NULL) 301 history_end(h); 302 303 if (!rl_instream) 304 rl_instream = stdin; 305 if (!rl_outstream) 306 rl_outstream = stdout; 307 308 /* 309 * See if we don't really want to run the editor 310 */ 311 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 312 editmode = 0; 313 314 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 315 316 if (!editmode) 317 el_set(e, EL_EDITMODE, 0); 318 319 h = history_init(); 320 if (!e || !h) 321 return -1; 322 323 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 324 history_length = 0; 325 max_input_history = INT_MAX; 326 el_set(e, EL_HIST, history, h); 327 328 /* Setup resize function */ 329 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 330 331 /* setup getc function if valid */ 332 if (rl_getc_function) 333 el_set(e, EL_GETCFN, _getc_function); 334 335 /* for proper prompt printing in readline() */ 336 if (rl_set_prompt("") == -1) { 337 history_end(h); 338 el_end(e); 339 return -1; 340 } 341 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 342 el_set(e, EL_SIGNAL, rl_catch_signals); 343 344 /* set default mode to "emacs"-style and read setting afterwards */ 345 /* so this can be overriden */ 346 el_set(e, EL_EDITOR, "emacs"); 347 if (rl_terminal_name != NULL) 348 el_set(e, EL_TERMINAL, rl_terminal_name); 349 else 350 el_get(e, EL_TERMINAL, &rl_terminal_name); 351 352 /* 353 * Word completion - this has to go AFTER rebinding keys 354 * to emacs-style. 355 */ 356 el_set(e, EL_ADDFN, "rl_complete", 357 "ReadLine compatible completion function", 358 _el_rl_complete); 359 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 360 361 /* 362 * Send TSTP when ^Z is pressed. 363 */ 364 el_set(e, EL_ADDFN, "rl_tstp", 365 "ReadLine compatible suspend function", 366 _el_rl_tstp); 367 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 368 369 /* read settings from configuration file */ 370 el_source(e, NULL); 371 372 /* 373 * Unfortunately, some applications really do use rl_point 374 * and rl_line_buffer directly. 375 */ 376 _resize_fun(e, &rl_line_buffer); 377 _rl_update_pos(); 378 379 if (rl_startup_hook) 380 (*rl_startup_hook)(NULL, 0); 381 382 return 0; 383 } 384 385 386 /* 387 * read one line from input stream and return it, chomping 388 * trailing newline (if there is any) 389 */ 390 char * 391 readline(const char *p) 392 { 393 HistEvent ev; 394 const char * volatile prompt = p; 395 int count; 396 const char *ret; 397 char *buf; 398 static int used_event_hook; 399 400 if (e == NULL || h == NULL) 401 rl_initialize(); 402 403 rl_done = 0; 404 405 (void)setjmp(topbuf); 406 407 /* update prompt accordingly to what has been passed */ 408 if (rl_set_prompt(prompt) == -1) 409 return NULL; 410 411 if (rl_pre_input_hook) 412 (*rl_pre_input_hook)(NULL, 0); 413 414 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 415 el_set(e, EL_GETCFN, _rl_event_read_char); 416 used_event_hook = 1; 417 } 418 419 if (!rl_event_hook && used_event_hook) { 420 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 421 used_event_hook = 0; 422 } 423 424 rl_already_prompted = 0; 425 426 /* get one line from input stream */ 427 ret = el_gets(e, &count); 428 429 if (ret && count > 0) { 430 int lastidx; 431 432 buf = strdup(ret); 433 if (buf == NULL) 434 return NULL; 435 lastidx = count - 1; 436 if (buf[lastidx] == '\n') 437 buf[lastidx] = '\0'; 438 } else 439 buf = NULL; 440 441 history(h, &ev, H_GETSIZE); 442 history_length = ev.num; 443 444 return buf; 445 } 446 447 /* 448 * history functions 449 */ 450 451 /* 452 * is normally called before application starts to use 453 * history expansion functions 454 */ 455 void 456 using_history(void) 457 { 458 if (h == NULL || e == NULL) 459 rl_initialize(); 460 } 461 462 463 /* 464 * substitute ``what'' with ``with'', returning resulting string; if 465 * globally == 1, substitutes all occurrences of what, otherwise only the 466 * first one 467 */ 468 static char * 469 _rl_compat_sub(const char *str, const char *what, const char *with, 470 int globally) 471 { 472 const char *s; 473 char *r, *result; 474 size_t len, with_len, what_len; 475 476 len = strlen(str); 477 with_len = strlen(with); 478 what_len = strlen(what); 479 480 /* calculate length we need for result */ 481 s = str; 482 while (*s) { 483 if (*s == *what && !strncmp(s, what, what_len)) { 484 len += with_len - what_len; 485 if (!globally) 486 break; 487 s += what_len; 488 } else 489 s++; 490 } 491 r = result = el_malloc((len + 1) * sizeof(*r)); 492 if (result == NULL) 493 return NULL; 494 s = str; 495 while (*s) { 496 if (*s == *what && !strncmp(s, what, what_len)) { 497 (void)strncpy(r, with, with_len); 498 r += with_len; 499 s += what_len; 500 if (!globally) { 501 (void)strcpy(r, s); 502 return result; 503 } 504 } else 505 *r++ = *s++; 506 } 507 *r = '\0'; 508 return result; 509 } 510 511 static char *last_search_pat; /* last !?pat[?] search pattern */ 512 static char *last_search_match; /* last !?pat[?] that matched */ 513 514 const char * 515 get_history_event(const char *cmd, int *cindex, int qchar) 516 { 517 int idx, sign, sub, num, begin, ret; 518 size_t len; 519 char *pat; 520 const char *rptr; 521 HistEvent ev; 522 523 idx = *cindex; 524 if (cmd[idx++] != history_expansion_char) 525 return NULL; 526 527 /* find out which event to take */ 528 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 529 if (history(h, &ev, H_FIRST) != 0) 530 return NULL; 531 *cindex = cmd[idx]? (idx + 1):idx; 532 return ev.str; 533 } 534 sign = 0; 535 if (cmd[idx] == '-') { 536 sign = 1; 537 idx++; 538 } 539 540 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 541 HIST_ENTRY *rl_he; 542 543 num = 0; 544 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 545 num = num * 10 + cmd[idx] - '0'; 546 idx++; 547 } 548 if (sign) 549 num = history_length - num + 1; 550 551 if (!(rl_he = history_get(num))) 552 return NULL; 553 554 *cindex = idx; 555 return rl_he->line; 556 } 557 sub = 0; 558 if (cmd[idx] == '?') { 559 sub = 1; 560 idx++; 561 } 562 begin = idx; 563 while (cmd[idx]) { 564 if (cmd[idx] == '\n') 565 break; 566 if (sub && cmd[idx] == '?') 567 break; 568 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 569 || cmd[idx] == '\t' || cmd[idx] == qchar)) 570 break; 571 idx++; 572 } 573 len = (size_t)idx - (size_t)begin; 574 if (sub && cmd[idx] == '?') 575 idx++; 576 if (sub && len == 0 && last_search_pat && *last_search_pat) 577 pat = last_search_pat; 578 else if (len == 0) 579 return NULL; 580 else { 581 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 582 return NULL; 583 (void)strncpy(pat, cmd + begin, len); 584 pat[len] = '\0'; 585 } 586 587 if (history(h, &ev, H_CURR) != 0) { 588 if (pat != last_search_pat) 589 el_free(pat); 590 return NULL; 591 } 592 num = ev.num; 593 594 if (sub) { 595 if (pat != last_search_pat) { 596 if (last_search_pat) 597 el_free(last_search_pat); 598 last_search_pat = pat; 599 } 600 ret = history_search(pat, -1); 601 } else 602 ret = history_search_prefix(pat, -1); 603 604 if (ret == -1) { 605 /* restore to end of list on failed search */ 606 history(h, &ev, H_FIRST); 607 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 608 if (pat != last_search_pat) 609 el_free(pat); 610 return NULL; 611 } 612 613 if (sub && len) { 614 if (last_search_match && last_search_match != pat) 615 el_free(last_search_match); 616 last_search_match = pat; 617 } 618 619 if (pat != last_search_pat) 620 el_free(pat); 621 622 if (history(h, &ev, H_CURR) != 0) 623 return NULL; 624 *cindex = idx; 625 rptr = ev.str; 626 627 /* roll back to original position */ 628 (void)history(h, &ev, H_SET, num); 629 630 return rptr; 631 } 632 633 /* 634 * the real function doing history expansion - takes as argument command 635 * to do and data upon which the command should be executed 636 * does expansion the way I've understood readline documentation 637 * 638 * returns 0 if data was not modified, 1 if it was and 2 if the string 639 * should be only printed and not executed; in case of error, 640 * returns -1 and *result points to NULL 641 * it's callers responsibility to free() string returned in *result 642 */ 643 static int 644 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 645 char **result) 646 { 647 char *tmp, *search = NULL, *aptr; 648 const char *ptr, *cmd; 649 static char *from = NULL, *to = NULL; 650 int start, end, idx, has_mods = 0; 651 int p_on = 0, g_on = 0; 652 653 *result = NULL; 654 aptr = NULL; 655 ptr = NULL; 656 657 /* First get event specifier */ 658 idx = 0; 659 660 if (strchr(":^*$", command[offs + 1])) { 661 char str[4]; 662 /* 663 * "!:" is shorthand for "!!:". 664 * "!^", "!*" and "!$" are shorthand for 665 * "!!:^", "!!:*" and "!!:$" respectively. 666 */ 667 str[0] = str[1] = '!'; 668 str[2] = '0'; 669 ptr = get_history_event(str, &idx, 0); 670 idx = (command[offs + 1] == ':')? 1:0; 671 has_mods = 1; 672 } else { 673 if (command[offs + 1] == '#') { 674 /* use command so far */ 675 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 676 == NULL) 677 return -1; 678 (void)strncpy(aptr, command, offs); 679 aptr[offs] = '\0'; 680 idx = 1; 681 } else { 682 int qchar; 683 684 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 685 ptr = get_history_event(command + offs, &idx, qchar); 686 } 687 has_mods = command[offs + (size_t)idx] == ':'; 688 } 689 690 if (ptr == NULL && aptr == NULL) 691 return -1; 692 693 if (!has_mods) { 694 *result = strdup(aptr ? aptr : ptr); 695 if (aptr) 696 el_free(aptr); 697 if (*result == NULL) 698 return -1; 699 return 1; 700 } 701 702 cmd = command + offs + idx + 1; 703 704 /* Now parse any word designators */ 705 706 if (*cmd == '%') /* last word matched by ?pat? */ 707 tmp = strdup(last_search_match? last_search_match:""); 708 else if (strchr("^*$-0123456789", *cmd)) { 709 start = end = -1; 710 if (*cmd == '^') 711 start = end = 1, cmd++; 712 else if (*cmd == '$') 713 start = -1, cmd++; 714 else if (*cmd == '*') 715 start = 1, cmd++; 716 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 717 start = 0; 718 while (*cmd && '0' <= *cmd && *cmd <= '9') 719 start = start * 10 + *cmd++ - '0'; 720 721 if (*cmd == '-') { 722 if (isdigit((unsigned char) cmd[1])) { 723 cmd++; 724 end = 0; 725 while (*cmd && '0' <= *cmd && *cmd <= '9') 726 end = end * 10 + *cmd++ - '0'; 727 } else if (cmd[1] == '$') { 728 cmd += 2; 729 end = -1; 730 } else { 731 cmd++; 732 end = -2; 733 } 734 } else if (*cmd == '*') 735 end = -1, cmd++; 736 else 737 end = start; 738 } 739 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 740 if (tmp == NULL) { 741 (void)fprintf(rl_outstream, "%s: Bad word specifier", 742 command + offs + idx); 743 if (aptr) 744 el_free(aptr); 745 return -1; 746 } 747 } else 748 tmp = strdup(aptr? aptr:ptr); 749 750 if (aptr) 751 el_free(aptr); 752 753 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 754 *result = tmp; 755 return 1; 756 } 757 758 for (; *cmd; cmd++) { 759 if (*cmd == ':') 760 continue; 761 else if (*cmd == 'h') { /* remove trailing path */ 762 if ((aptr = strrchr(tmp, '/')) != NULL) 763 *aptr = '\0'; 764 } else if (*cmd == 't') { /* remove leading path */ 765 if ((aptr = strrchr(tmp, '/')) != NULL) { 766 aptr = strdup(aptr + 1); 767 el_free(tmp); 768 tmp = aptr; 769 } 770 } else if (*cmd == 'r') { /* remove trailing suffix */ 771 if ((aptr = strrchr(tmp, '.')) != NULL) 772 *aptr = '\0'; 773 } else if (*cmd == 'e') { /* remove all but suffix */ 774 if ((aptr = strrchr(tmp, '.')) != NULL) { 775 aptr = strdup(aptr); 776 el_free(tmp); 777 tmp = aptr; 778 } 779 } else if (*cmd == 'p') /* print only */ 780 p_on = 1; 781 else if (*cmd == 'g') 782 g_on = 2; 783 else if (*cmd == 's' || *cmd == '&') { 784 char *what, *with, delim; 785 size_t len, from_len; 786 size_t size; 787 788 if (*cmd == '&' && (from == NULL || to == NULL)) 789 continue; 790 else if (*cmd == 's') { 791 delim = *(++cmd), cmd++; 792 size = 16; 793 what = el_realloc(from, size * sizeof(*what)); 794 if (what == NULL) { 795 el_free(from); 796 el_free(tmp); 797 return 0; 798 } 799 len = 0; 800 for (; *cmd && *cmd != delim; cmd++) { 801 if (*cmd == '\\' && cmd[1] == delim) 802 cmd++; 803 if (len >= size) { 804 char *nwhat; 805 nwhat = el_realloc(what, 806 (size <<= 1) * 807 sizeof(*nwhat)); 808 if (nwhat == NULL) { 809 el_free(what); 810 el_free(tmp); 811 return 0; 812 } 813 what = nwhat; 814 } 815 what[len++] = *cmd; 816 } 817 what[len] = '\0'; 818 from = what; 819 if (*what == '\0') { 820 el_free(what); 821 if (search) { 822 from = strdup(search); 823 if (from == NULL) { 824 el_free(tmp); 825 return 0; 826 } 827 } else { 828 from = NULL; 829 el_free(tmp); 830 return -1; 831 } 832 } 833 cmd++; /* shift after delim */ 834 if (!*cmd) 835 continue; 836 837 size = 16; 838 with = el_realloc(to, size * sizeof(*with)); 839 if (with == NULL) { 840 el_free(to); 841 el_free(tmp); 842 return -1; 843 } 844 len = 0; 845 from_len = strlen(from); 846 for (; *cmd && *cmd != delim; cmd++) { 847 if (len + from_len + 1 >= size) { 848 char *nwith; 849 size += from_len + 1; 850 nwith = el_realloc(with, 851 size * sizeof(*nwith)); 852 if (nwith == NULL) { 853 el_free(with); 854 el_free(tmp); 855 return -1; 856 } 857 with = nwith; 858 } 859 if (*cmd == '&') { 860 /* safe */ 861 (void)strcpy(&with[len], from); 862 len += from_len; 863 continue; 864 } 865 if (*cmd == '\\' 866 && (*(cmd + 1) == delim 867 || *(cmd + 1) == '&')) 868 cmd++; 869 with[len++] = *cmd; 870 } 871 with[len] = '\0'; 872 to = with; 873 } 874 875 aptr = _rl_compat_sub(tmp, from, to, g_on); 876 if (aptr) { 877 el_free(tmp); 878 tmp = aptr; 879 } 880 g_on = 0; 881 } 882 } 883 *result = tmp; 884 return p_on? 2:1; 885 } 886 887 888 /* 889 * csh-style history expansion 890 */ 891 int 892 history_expand(char *str, char **output) 893 { 894 int ret = 0; 895 size_t idx, i, size; 896 char *tmp, *result; 897 898 if (h == NULL || e == NULL) 899 rl_initialize(); 900 901 if (history_expansion_char == 0) { 902 *output = strdup(str); 903 return 0; 904 } 905 906 *output = NULL; 907 if (str[0] == history_subst_char) { 908 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 909 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 910 if (*output == NULL) 911 return 0; 912 (*output)[0] = (*output)[1] = history_expansion_char; 913 (*output)[2] = ':'; 914 (*output)[3] = 's'; 915 (void)strcpy((*output) + 4, str); 916 str = *output; 917 } else { 918 *output = strdup(str); 919 if (*output == NULL) 920 return 0; 921 } 922 923 #define ADD_STRING(what, len, fr) \ 924 { \ 925 if (idx + len + 1 > size) { \ 926 char *nresult = el_realloc(result, \ 927 (size += len + 1) * sizeof(*nresult)); \ 928 if (nresult == NULL) { \ 929 el_free(*output); \ 930 if (/*CONSTCOND*/fr) \ 931 el_free(tmp); \ 932 return 0; \ 933 } \ 934 result = nresult; \ 935 } \ 936 (void)strncpy(&result[idx], what, len); \ 937 idx += len; \ 938 result[idx] = '\0'; \ 939 } 940 941 result = NULL; 942 size = idx = 0; 943 tmp = NULL; 944 for (i = 0; str[i];) { 945 int qchar, loop_again; 946 size_t len, start, j; 947 948 qchar = 0; 949 loop_again = 1; 950 start = j = i; 951 loop: 952 for (; str[j]; j++) { 953 if (str[j] == '\\' && 954 str[j + 1] == history_expansion_char) { 955 (void)strcpy(&str[j], &str[j + 1]); 956 continue; 957 } 958 if (!loop_again) { 959 if (isspace((unsigned char) str[j]) 960 || str[j] == qchar) 961 break; 962 } 963 if (str[j] == history_expansion_char 964 && !strchr(history_no_expand_chars, str[j + 1]) 965 && (!history_inhibit_expansion_function || 966 (*history_inhibit_expansion_function)(str, 967 (int)j) == 0)) 968 break; 969 } 970 971 if (str[j] && loop_again) { 972 i = j; 973 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 974 j++; 975 if (str[j] == history_expansion_char) 976 j++; 977 loop_again = 0; 978 goto loop; 979 } 980 len = i - start; 981 ADD_STRING(&str[start], len, 0); 982 983 if (str[i] == '\0' || str[i] != history_expansion_char) { 984 len = j - i; 985 ADD_STRING(&str[i], len, 0); 986 if (start == 0) 987 ret = 0; 988 else 989 ret = 1; 990 break; 991 } 992 ret = _history_expand_command (str, i, (j - i), &tmp); 993 if (ret > 0 && tmp) { 994 len = strlen(tmp); 995 ADD_STRING(tmp, len, 1); 996 } 997 if (tmp) { 998 el_free(tmp); 999 tmp = NULL; 1000 } 1001 i = j; 1002 } 1003 1004 /* ret is 2 for "print only" option */ 1005 if (ret == 2) { 1006 add_history(result); 1007 #ifdef GDB_411_HACK 1008 /* gdb 4.11 has been shipped with readline, where */ 1009 /* history_expand() returned -1 when the line */ 1010 /* should not be executed; in readline 2.1+ */ 1011 /* it should return 2 in such a case */ 1012 ret = -1; 1013 #endif 1014 } 1015 el_free(*output); 1016 *output = result; 1017 1018 return ret; 1019 } 1020 1021 /* 1022 * Return a string consisting of arguments of "str" from "start" to "end". 1023 */ 1024 char * 1025 history_arg_extract(int start, int end, const char *str) 1026 { 1027 size_t i, len, max; 1028 char **arr, *result = NULL; 1029 1030 arr = history_tokenize(str); 1031 if (!arr) 1032 return NULL; 1033 if (arr && *arr == NULL) 1034 goto out; 1035 1036 for (max = 0; arr[max]; max++) 1037 continue; 1038 max--; 1039 1040 if (start == '$') 1041 start = (int)max; 1042 if (end == '$') 1043 end = (int)max; 1044 if (end < 0) 1045 end = (int)max + end + 1; 1046 if (start < 0) 1047 start = end; 1048 1049 if (start < 0 || end < 0 || (size_t)start > max || 1050 (size_t)end > max || start > end) 1051 goto out; 1052 1053 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1054 len += strlen(arr[i]) + 1; 1055 len++; 1056 result = el_malloc(len * sizeof(*result)); 1057 if (result == NULL) 1058 goto out; 1059 1060 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1061 (void)strcpy(result + len, arr[i]); 1062 len += strlen(arr[i]); 1063 if (i < (size_t)end) 1064 result[len++] = ' '; 1065 } 1066 result[len] = '\0'; 1067 1068 out: 1069 for (i = 0; arr[i]; i++) 1070 el_free(arr[i]); 1071 el_free(arr); 1072 1073 return result; 1074 } 1075 1076 /* 1077 * Parse the string into individual tokens, 1078 * similar to how shell would do it. 1079 */ 1080 char ** 1081 history_tokenize(const char *str) 1082 { 1083 int size = 1, idx = 0, i, start; 1084 size_t len; 1085 char **result = NULL, *temp, delim = '\0'; 1086 1087 for (i = 0; str[i];) { 1088 while (isspace((unsigned char) str[i])) 1089 i++; 1090 start = i; 1091 for (; str[i];) { 1092 if (str[i] == '\\') { 1093 if (str[i+1] != '\0') 1094 i++; 1095 } else if (str[i] == delim) 1096 delim = '\0'; 1097 else if (!delim && 1098 (isspace((unsigned char) str[i]) || 1099 strchr("()<>;&|$", str[i]))) 1100 break; 1101 else if (!delim && strchr("'`\"", str[i])) 1102 delim = str[i]; 1103 if (str[i]) 1104 i++; 1105 } 1106 1107 if (idx + 2 >= size) { 1108 char **nresult; 1109 size <<= 1; 1110 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1111 if (nresult == NULL) { 1112 el_free(result); 1113 return NULL; 1114 } 1115 result = nresult; 1116 } 1117 len = (size_t)i - (size_t)start; 1118 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1119 if (temp == NULL) { 1120 for (i = 0; i < idx; i++) 1121 el_free(result[i]); 1122 el_free(result); 1123 return NULL; 1124 } 1125 (void)strncpy(temp, &str[start], len); 1126 temp[len] = '\0'; 1127 result[idx++] = temp; 1128 result[idx] = NULL; 1129 if (str[i]) 1130 i++; 1131 } 1132 return result; 1133 } 1134 1135 1136 /* 1137 * limit size of history record to ``max'' events 1138 */ 1139 void 1140 stifle_history(int max) 1141 { 1142 HistEvent ev; 1143 1144 if (h == NULL || e == NULL) 1145 rl_initialize(); 1146 1147 if (history(h, &ev, H_SETSIZE, max) == 0) 1148 max_input_history = max; 1149 } 1150 1151 1152 /* 1153 * "unlimit" size of history - set the limit to maximum allowed int value 1154 */ 1155 int 1156 unstifle_history(void) 1157 { 1158 HistEvent ev; 1159 int omax; 1160 1161 history(h, &ev, H_SETSIZE, INT_MAX); 1162 omax = max_input_history; 1163 max_input_history = INT_MAX; 1164 return omax; /* some value _must_ be returned */ 1165 } 1166 1167 1168 int 1169 history_is_stifled(void) 1170 { 1171 1172 /* cannot return true answer */ 1173 return max_input_history != INT_MAX; 1174 } 1175 1176 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1177 1178 int 1179 history_truncate_file (const char *filename, int nlines) 1180 { 1181 int ret = 0; 1182 FILE *fp, *tp; 1183 char template[sizeof(_history_tmp_template)]; 1184 char buf[4096]; 1185 int fd; 1186 char *cp; 1187 off_t off; 1188 int count = 0; 1189 ssize_t left = 0; 1190 1191 if (filename == NULL && (filename = _default_history_file()) == NULL) 1192 return errno; 1193 if ((fp = fopen(filename, "r+")) == NULL) 1194 return errno; 1195 strcpy(template, _history_tmp_template); 1196 if ((fd = mkstemp(template)) == -1) { 1197 ret = errno; 1198 goto out1; 1199 } 1200 1201 if ((tp = fdopen(fd, "r+")) == NULL) { 1202 close(fd); 1203 ret = errno; 1204 goto out2; 1205 } 1206 1207 for(;;) { 1208 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1209 if (ferror(fp)) { 1210 ret = errno; 1211 break; 1212 } 1213 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1214 (off_t)-1) { 1215 ret = errno; 1216 break; 1217 } 1218 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1219 if (ferror(fp)) { 1220 ret = errno; 1221 break; 1222 } 1223 if (left == 0) { 1224 count--; 1225 left = sizeof(buf); 1226 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1227 != 1) { 1228 ret = errno; 1229 break; 1230 } 1231 fflush(tp); 1232 break; 1233 } 1234 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1235 ret = errno; 1236 break; 1237 } 1238 count++; 1239 } 1240 if (ret) 1241 goto out3; 1242 cp = buf + left - 1; 1243 if(*cp != '\n') 1244 cp++; 1245 for(;;) { 1246 while (--cp >= buf) { 1247 if (*cp == '\n') { 1248 if (--nlines == 0) { 1249 if (++cp >= buf + sizeof(buf)) { 1250 count++; 1251 cp = buf; 1252 } 1253 break; 1254 } 1255 } 1256 } 1257 if (nlines <= 0 || count == 0) 1258 break; 1259 count--; 1260 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1261 ret = errno; 1262 break; 1263 } 1264 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1265 if (ferror(tp)) { 1266 ret = errno; 1267 break; 1268 } 1269 ret = EAGAIN; 1270 break; 1271 } 1272 cp = buf + sizeof(buf); 1273 } 1274 1275 if (ret || nlines > 0) 1276 goto out3; 1277 1278 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1279 ret = errno; 1280 goto out3; 1281 } 1282 1283 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1284 (off_t)-1) { 1285 ret = errno; 1286 goto out3; 1287 } 1288 1289 for(;;) { 1290 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1291 if (ferror(fp)) 1292 ret = errno; 1293 break; 1294 } 1295 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1296 ret = errno; 1297 break; 1298 } 1299 } 1300 fflush(fp); 1301 if((off = ftello(fp)) > 0) 1302 (void)ftruncate(fileno(fp), off); 1303 out3: 1304 fclose(tp); 1305 out2: 1306 unlink(template); 1307 out1: 1308 fclose(fp); 1309 1310 return ret; 1311 } 1312 1313 1314 /* 1315 * read history from a file given 1316 */ 1317 int 1318 read_history(const char *filename) 1319 { 1320 HistEvent ev; 1321 1322 if (h == NULL || e == NULL) 1323 rl_initialize(); 1324 if (filename == NULL && (filename = _default_history_file()) == NULL) 1325 return errno; 1326 return history(h, &ev, H_LOAD, filename) == -1 ? 1327 (errno ? errno : EINVAL) : 0; 1328 } 1329 1330 1331 /* 1332 * write history to a file given 1333 */ 1334 int 1335 write_history(const char *filename) 1336 { 1337 HistEvent ev; 1338 1339 if (h == NULL || e == NULL) 1340 rl_initialize(); 1341 if (filename == NULL && (filename = _default_history_file()) == NULL) 1342 return errno; 1343 return history(h, &ev, H_SAVE, filename) == -1 ? 1344 (errno ? errno : EINVAL) : 0; 1345 } 1346 1347 1348 /* 1349 * returns history ``num''th event 1350 * 1351 * returned pointer points to static variable 1352 */ 1353 HIST_ENTRY * 1354 history_get(int num) 1355 { 1356 static HIST_ENTRY she; 1357 HistEvent ev; 1358 int curr_num; 1359 1360 if (h == NULL || e == NULL) 1361 rl_initialize(); 1362 1363 /* save current position */ 1364 if (history(h, &ev, H_CURR) != 0) 1365 return NULL; 1366 curr_num = ev.num; 1367 1368 /* start from the oldest */ 1369 if (history(h, &ev, H_LAST) != 0) 1370 return NULL; /* error */ 1371 1372 /* look forwards for event matching specified offset */ 1373 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1374 return NULL; 1375 1376 she.line = ev.str; 1377 1378 /* restore pointer to where it was */ 1379 (void)history(h, &ev, H_SET, curr_num); 1380 1381 return &she; 1382 } 1383 1384 1385 /* 1386 * add the line to history table 1387 */ 1388 int 1389 add_history(const char *line) 1390 { 1391 HistEvent ev; 1392 1393 if (line == NULL) 1394 return 0; 1395 1396 if (h == NULL || e == NULL) 1397 rl_initialize(); 1398 1399 (void)history(h, &ev, H_ENTER, line); 1400 if (history(h, &ev, H_GETSIZE) == 0) 1401 history_length = ev.num; 1402 1403 return !(history_length > 0); /* return 0 if all is okay */ 1404 } 1405 1406 1407 /* 1408 * remove the specified entry from the history list and return it. 1409 */ 1410 HIST_ENTRY * 1411 remove_history(int num) 1412 { 1413 HIST_ENTRY *he; 1414 HistEvent ev; 1415 1416 if (h == NULL || e == NULL) 1417 rl_initialize(); 1418 1419 if ((he = el_malloc(sizeof(*he))) == NULL) 1420 return NULL; 1421 1422 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1423 el_free(he); 1424 return NULL; 1425 } 1426 1427 he->line = ev.str; 1428 if (history(h, &ev, H_GETSIZE) == 0) 1429 history_length = ev.num; 1430 1431 return he; 1432 } 1433 1434 1435 /* 1436 * replace the line and data of the num-th entry 1437 */ 1438 HIST_ENTRY * 1439 replace_history_entry(int num, const char *line, histdata_t data) 1440 { 1441 HIST_ENTRY *he; 1442 HistEvent ev; 1443 int curr_num; 1444 1445 if (h == NULL || e == NULL) 1446 rl_initialize(); 1447 1448 /* save current position */ 1449 if (history(h, &ev, H_CURR) != 0) 1450 return NULL; 1451 curr_num = ev.num; 1452 1453 /* start from the oldest */ 1454 if (history(h, &ev, H_LAST) != 0) 1455 return NULL; /* error */ 1456 1457 if ((he = el_malloc(sizeof(*he))) == NULL) 1458 return NULL; 1459 1460 /* look forwards for event matching specified offset */ 1461 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1462 goto out; 1463 1464 he->line = strdup(ev.str); 1465 if (he->line == NULL) 1466 goto out; 1467 1468 if (history(h, &ev, H_REPLACE, line, data)) 1469 goto out; 1470 1471 /* restore pointer to where it was */ 1472 if (history(h, &ev, H_SET, curr_num)) 1473 goto out; 1474 1475 return he; 1476 out: 1477 el_free(he); 1478 return NULL; 1479 } 1480 1481 /* 1482 * clear the history list - delete all entries 1483 */ 1484 void 1485 clear_history(void) 1486 { 1487 HistEvent ev; 1488 1489 if (h == NULL || e == NULL) 1490 rl_initialize(); 1491 1492 (void)history(h, &ev, H_CLEAR); 1493 history_length = 0; 1494 } 1495 1496 1497 /* 1498 * returns offset of the current history event 1499 */ 1500 int 1501 where_history(void) 1502 { 1503 HistEvent ev; 1504 int curr_num, off; 1505 1506 if (history(h, &ev, H_CURR) != 0) 1507 return 0; 1508 curr_num = ev.num; 1509 1510 (void)history(h, &ev, H_FIRST); 1511 off = 1; 1512 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1513 off++; 1514 1515 return off; 1516 } 1517 1518 1519 /* 1520 * returns current history event or NULL if there is no such event 1521 */ 1522 HIST_ENTRY * 1523 current_history(void) 1524 { 1525 1526 return _move_history(H_CURR); 1527 } 1528 1529 1530 /* 1531 * returns total number of bytes history events' data are using 1532 */ 1533 int 1534 history_total_bytes(void) 1535 { 1536 HistEvent ev; 1537 int curr_num; 1538 size_t size; 1539 1540 if (history(h, &ev, H_CURR) != 0) 1541 return -1; 1542 curr_num = ev.num; 1543 1544 (void)history(h, &ev, H_FIRST); 1545 size = 0; 1546 do 1547 size += strlen(ev.str) * sizeof(*ev.str); 1548 while (history(h, &ev, H_NEXT) == 0); 1549 1550 /* get to the same position as before */ 1551 history(h, &ev, H_PREV_EVENT, curr_num); 1552 1553 return (int)size; 1554 } 1555 1556 1557 /* 1558 * sets the position in the history list to ``pos'' 1559 */ 1560 int 1561 history_set_pos(int pos) 1562 { 1563 HistEvent ev; 1564 int curr_num; 1565 1566 if (pos >= history_length || pos < 0) 1567 return -1; 1568 1569 (void)history(h, &ev, H_CURR); 1570 curr_num = ev.num; 1571 1572 /* 1573 * use H_DELDATA to set to nth history (without delete) by passing 1574 * (void **)-1 1575 */ 1576 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1577 (void)history(h, &ev, H_SET, curr_num); 1578 return -1; 1579 } 1580 return 0; 1581 } 1582 1583 1584 /* 1585 * returns previous event in history and shifts pointer accordingly 1586 */ 1587 HIST_ENTRY * 1588 previous_history(void) 1589 { 1590 1591 return _move_history(H_PREV); 1592 } 1593 1594 1595 /* 1596 * returns next event in history and shifts pointer accordingly 1597 */ 1598 HIST_ENTRY * 1599 next_history(void) 1600 { 1601 1602 return _move_history(H_NEXT); 1603 } 1604 1605 1606 /* 1607 * searches for first history event containing the str 1608 */ 1609 int 1610 history_search(const char *str, int direction) 1611 { 1612 HistEvent ev; 1613 const char *strp; 1614 int curr_num; 1615 1616 if (history(h, &ev, H_CURR) != 0) 1617 return -1; 1618 curr_num = ev.num; 1619 1620 for (;;) { 1621 if ((strp = strstr(ev.str, str)) != NULL) 1622 return (int)(strp - ev.str); 1623 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1624 break; 1625 } 1626 (void)history(h, &ev, H_SET, curr_num); 1627 return -1; 1628 } 1629 1630 1631 /* 1632 * searches for first history event beginning with str 1633 */ 1634 int 1635 history_search_prefix(const char *str, int direction) 1636 { 1637 HistEvent ev; 1638 1639 return (history(h, &ev, direction < 0 ? 1640 H_PREV_STR : H_NEXT_STR, str)); 1641 } 1642 1643 1644 /* 1645 * search for event in history containing str, starting at offset 1646 * abs(pos); continue backward, if pos<0, forward otherwise 1647 */ 1648 /* ARGSUSED */ 1649 int 1650 history_search_pos(const char *str, 1651 int direction __attribute__((__unused__)), int pos) 1652 { 1653 HistEvent ev; 1654 int curr_num, off; 1655 1656 off = (pos > 0) ? pos : -pos; 1657 pos = (pos > 0) ? 1 : -1; 1658 1659 if (history(h, &ev, H_CURR) != 0) 1660 return -1; 1661 curr_num = ev.num; 1662 1663 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1664 return -1; 1665 1666 for (;;) { 1667 if (strstr(ev.str, str)) 1668 return off; 1669 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1670 break; 1671 } 1672 1673 /* set "current" pointer back to previous state */ 1674 (void)history(h, &ev, 1675 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1676 1677 return -1; 1678 } 1679 1680 1681 /********************************/ 1682 /* completion functions */ 1683 1684 char * 1685 tilde_expand(char *name) 1686 { 1687 return fn_tilde_expand(name); 1688 } 1689 1690 char * 1691 filename_completion_function(const char *name, int state) 1692 { 1693 return fn_filename_completion_function(name, state); 1694 } 1695 1696 /* 1697 * a completion generator for usernames; returns _first_ username 1698 * which starts with supplied text 1699 * text contains a partial username preceded by random character 1700 * (usually '~'); state resets search from start (??? should we do that anyway) 1701 * it's callers responsibility to free returned value 1702 */ 1703 char * 1704 username_completion_function(const char *text, int state) 1705 { 1706 struct passwd *pass = NULL; 1707 1708 if (text[0] == '\0') 1709 return NULL; 1710 1711 if (*text == '~') 1712 text++; 1713 1714 if (state == 0) 1715 setpwent(); 1716 1717 while ( 1718 (pass = getpwent()) != NULL 1719 && text[0] == pass->pw_name[0] 1720 && strcmp(text, pass->pw_name) == 0) 1721 continue; 1722 1723 if (pass == NULL) { 1724 endpwent(); 1725 return NULL; 1726 } 1727 return strdup(pass->pw_name); 1728 } 1729 1730 1731 /* 1732 * el-compatible wrapper to send TSTP on ^Z 1733 */ 1734 /* ARGSUSED */ 1735 static unsigned char 1736 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1737 { 1738 (void)kill(0, SIGTSTP); 1739 return CC_NORM; 1740 } 1741 1742 /* 1743 * Display list of strings in columnar format on readline's output stream. 1744 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1745 * 'max' is maximum length of string in 'matches'. 1746 */ 1747 void 1748 rl_display_match_list(char **matches, int len, int max) 1749 { 1750 1751 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1752 } 1753 1754 static const char * 1755 /*ARGSUSED*/ 1756 _rl_completion_append_character_function(const char *dummy 1757 __attribute__((__unused__))) 1758 { 1759 static char buf[2]; 1760 buf[0] = (char)rl_completion_append_character; 1761 buf[1] = '\0'; 1762 return buf; 1763 } 1764 1765 1766 /* 1767 * complete word at current point 1768 */ 1769 /* ARGSUSED */ 1770 int 1771 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1772 { 1773 #ifdef WIDECHAR 1774 static ct_buffer_t wbreak_conv, sprefix_conv; 1775 #endif 1776 char *breakchars; 1777 1778 if (h == NULL || e == NULL) 1779 rl_initialize(); 1780 1781 if (rl_inhibit_completion) { 1782 char arr[2]; 1783 arr[0] = (char)invoking_key; 1784 arr[1] = '\0'; 1785 el_insertstr(e, arr); 1786 return CC_REFRESH; 1787 } 1788 1789 if (rl_completion_word_break_hook != NULL) 1790 breakchars = (*rl_completion_word_break_hook)(); 1791 else 1792 breakchars = rl_basic_word_break_characters; 1793 1794 /* Just look at how many global variables modify this operation! */ 1795 return fn_complete(e, 1796 (CPFunction *)rl_completion_entry_function, 1797 rl_attempted_completion_function, 1798 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1799 ct_decode_string(breakchars, &sprefix_conv), 1800 _rl_completion_append_character_function, 1801 (size_t)rl_completion_query_items, 1802 &rl_completion_type, &rl_attempted_completion_over, 1803 &rl_point, &rl_end); 1804 1805 1806 } 1807 1808 1809 /* ARGSUSED */ 1810 static unsigned char 1811 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1812 { 1813 return (unsigned char)rl_complete(0, ch); 1814 } 1815 1816 /* 1817 * misc other functions 1818 */ 1819 1820 /* 1821 * bind key c to readline-type function func 1822 */ 1823 int 1824 rl_bind_key(int c, rl_command_func_t *func) 1825 { 1826 int retval = -1; 1827 1828 if (h == NULL || e == NULL) 1829 rl_initialize(); 1830 1831 if (func == rl_insert) { 1832 /* XXX notice there is no range checking of ``c'' */ 1833 e->el_map.key[c] = ED_INSERT; 1834 retval = 0; 1835 } 1836 return retval; 1837 } 1838 1839 1840 /* 1841 * read one key from input - handles chars pushed back 1842 * to input stream also 1843 */ 1844 int 1845 rl_read_key(void) 1846 { 1847 char fooarr[2 * sizeof(int)]; 1848 1849 if (e == NULL || h == NULL) 1850 rl_initialize(); 1851 1852 return el_getc(e, fooarr); 1853 } 1854 1855 1856 /* 1857 * reset the terminal 1858 */ 1859 /* ARGSUSED */ 1860 void 1861 rl_reset_terminal(const char *p __attribute__((__unused__))) 1862 { 1863 1864 if (h == NULL || e == NULL) 1865 rl_initialize(); 1866 el_reset(e); 1867 } 1868 1869 1870 /* 1871 * insert character ``c'' back into input stream, ``count'' times 1872 */ 1873 int 1874 rl_insert(int count, int c) 1875 { 1876 char arr[2]; 1877 1878 if (h == NULL || e == NULL) 1879 rl_initialize(); 1880 1881 /* XXX - int -> char conversion can lose on multichars */ 1882 arr[0] = (char)c; 1883 arr[1] = '\0'; 1884 1885 for (; count > 0; count--) 1886 el_push(e, arr); 1887 1888 return 0; 1889 } 1890 1891 int 1892 rl_insert_text(const char *text) 1893 { 1894 if (!text || *text == 0) 1895 return 0; 1896 1897 if (h == NULL || e == NULL) 1898 rl_initialize(); 1899 1900 if (el_insertstr(e, text) < 0) 1901 return 0; 1902 return (int)strlen(text); 1903 } 1904 1905 /*ARGSUSED*/ 1906 int 1907 rl_newline(int count __attribute__((__unused__)), 1908 int c __attribute__((__unused__))) 1909 { 1910 /* 1911 * Readline-4.0 appears to ignore the args. 1912 */ 1913 return rl_insert(1, '\n'); 1914 } 1915 1916 /*ARGSUSED*/ 1917 static unsigned char 1918 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1919 { 1920 if (map[c] == NULL) 1921 return CC_ERROR; 1922 1923 _rl_update_pos(); 1924 1925 (*map[c])(NULL, c); 1926 1927 /* If rl_done was set by the above call, deal with it here */ 1928 if (rl_done) 1929 return CC_EOF; 1930 1931 return CC_NORM; 1932 } 1933 1934 int 1935 rl_add_defun(const char *name, Function *fun, int c) 1936 { 1937 char dest[8]; 1938 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1939 return -1; 1940 map[(unsigned char)c] = fun; 1941 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1942 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1943 el_set(e, EL_BIND, dest, name, NULL); 1944 return 0; 1945 } 1946 1947 void 1948 rl_callback_read_char(void) 1949 { 1950 int count = 0, done = 0; 1951 const char *buf = el_gets(e, &count); 1952 char *wbuf; 1953 1954 if (buf == NULL || count-- <= 0) 1955 return; 1956 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1957 done = 1; 1958 if (buf[count] == '\n' || buf[count] == '\r') 1959 done = 2; 1960 1961 if (done && rl_linefunc != NULL) { 1962 el_set(e, EL_UNBUFFERED, 0); 1963 if (done == 2) { 1964 if ((wbuf = strdup(buf)) != NULL) 1965 wbuf[count] = '\0'; 1966 } else 1967 wbuf = NULL; 1968 (*(void (*)(const char *))rl_linefunc)(wbuf); 1969 //el_set(e, EL_UNBUFFERED, 1); 1970 } 1971 } 1972 1973 void 1974 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1975 { 1976 if (e == NULL) { 1977 rl_initialize(); 1978 } 1979 (void)rl_set_prompt(prompt); 1980 rl_linefunc = linefunc; 1981 el_set(e, EL_UNBUFFERED, 1); 1982 } 1983 1984 void 1985 rl_callback_handler_remove(void) 1986 { 1987 el_set(e, EL_UNBUFFERED, 0); 1988 rl_linefunc = NULL; 1989 } 1990 1991 void 1992 rl_redisplay(void) 1993 { 1994 char a[2]; 1995 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 1996 a[1] = '\0'; 1997 el_push(e, a); 1998 } 1999 2000 int 2001 rl_get_previous_history(int count, int key) 2002 { 2003 char a[2]; 2004 a[0] = (char)key; 2005 a[1] = '\0'; 2006 while (count--) 2007 el_push(e, a); 2008 return 0; 2009 } 2010 2011 void 2012 /*ARGSUSED*/ 2013 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2014 { 2015 el_set(e, EL_PREP_TERM, 1); 2016 } 2017 2018 void 2019 rl_deprep_terminal(void) 2020 { 2021 el_set(e, EL_PREP_TERM, 0); 2022 } 2023 2024 int 2025 rl_read_init_file(const char *s) 2026 { 2027 return el_source(e, s); 2028 } 2029 2030 int 2031 rl_parse_and_bind(const char *line) 2032 { 2033 const char **argv; 2034 int argc; 2035 Tokenizer *tok; 2036 2037 tok = tok_init(NULL); 2038 tok_str(tok, line, &argc, &argv); 2039 argc = el_parse(e, argc, argv); 2040 tok_end(tok); 2041 return argc ? 1 : 0; 2042 } 2043 2044 int 2045 rl_variable_bind(const char *var, const char *value) 2046 { 2047 /* 2048 * The proper return value is undocument, but this is what the 2049 * readline source seems to do. 2050 */ 2051 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2052 } 2053 2054 void 2055 rl_stuff_char(int c) 2056 { 2057 char buf[2]; 2058 2059 buf[0] = (char)c; 2060 buf[1] = '\0'; 2061 el_insertstr(e, buf); 2062 } 2063 2064 static int 2065 _rl_event_read_char(EditLine *el, char *cp) 2066 { 2067 int n; 2068 ssize_t num_read = 0; 2069 2070 *cp = '\0'; 2071 while (rl_event_hook) { 2072 2073 (*rl_event_hook)(); 2074 2075 #if defined(FIONREAD) 2076 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2077 return -1; 2078 if (n) 2079 num_read = read(el->el_infd, cp, (size_t)1); 2080 else 2081 num_read = 0; 2082 #elif defined(F_SETFL) && defined(O_NDELAY) 2083 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2084 return -1; 2085 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2086 return -1; 2087 num_read = read(el->el_infd, cp, 1); 2088 if (fcntl(el->el_infd, F_SETFL, n)) 2089 return -1; 2090 #else 2091 /* not non-blocking, but what you gonna do? */ 2092 num_read = read(el->el_infd, cp, 1); 2093 return -1; 2094 #endif 2095 2096 if (num_read < 0 && errno == EAGAIN) 2097 continue; 2098 if (num_read == 0) 2099 continue; 2100 break; 2101 } 2102 if (!rl_event_hook) 2103 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2104 return (int)num_read; 2105 } 2106 2107 static void 2108 _rl_update_pos(void) 2109 { 2110 const LineInfo *li = el_line(e); 2111 2112 rl_point = (int)(li->cursor - li->buffer); 2113 rl_end = (int)(li->lastchar - li->buffer); 2114 } 2115 2116 void 2117 rl_get_screen_size(int *rows, int *cols) 2118 { 2119 if (rows) 2120 el_get(e, EL_GETTC, "li", rows, (void *)0); 2121 if (cols) 2122 el_get(e, EL_GETTC, "co", cols, (void *)0); 2123 } 2124 2125 void 2126 rl_set_screen_size(int rows, int cols) 2127 { 2128 char buf[64]; 2129 (void)snprintf(buf, sizeof(buf), "%d", rows); 2130 el_set(e, EL_SETTC, "li", buf, NULL); 2131 (void)snprintf(buf, sizeof(buf), "%d", cols); 2132 el_set(e, EL_SETTC, "co", buf, NULL); 2133 } 2134 2135 char ** 2136 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2137 { 2138 size_t len, max, i, j, min; 2139 char **list, *match, *a, *b; 2140 2141 len = 1; 2142 max = 10; 2143 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2144 return NULL; 2145 2146 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2147 list[len++] = match; 2148 if (len == max) { 2149 char **nl; 2150 max += 10; 2151 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2152 goto out; 2153 list = nl; 2154 } 2155 } 2156 if (len == 1) 2157 goto out; 2158 list[len] = NULL; 2159 if (len == 2) { 2160 if ((list[0] = strdup(list[1])) == NULL) 2161 goto out; 2162 return list; 2163 } 2164 qsort(&list[1], len - 1, sizeof(*list), 2165 (int (*)(const void *, const void *)) strcmp); 2166 min = SIZE_T_MAX; 2167 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2168 b = list[i + 1]; 2169 for (j = 0; a[j] && a[j] == b[j]; j++) 2170 continue; 2171 if (min > j) 2172 min = j; 2173 } 2174 if (min == 0 && *str) { 2175 if ((list[0] = strdup(str)) == NULL) 2176 goto out; 2177 } else { 2178 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2179 goto out; 2180 (void)memcpy(list[0], list[1], min); 2181 list[0][min] = '\0'; 2182 } 2183 return list; 2184 2185 out: 2186 el_free(list); 2187 return NULL; 2188 } 2189 2190 char * 2191 rl_filename_completion_function (const char *text, int state) 2192 { 2193 return fn_filename_completion_function(text, state); 2194 } 2195 2196 void 2197 rl_forced_update_display(void) 2198 { 2199 el_set(e, EL_REFRESH); 2200 } 2201 2202 int 2203 _rl_abort_internal(void) 2204 { 2205 el_beep(e); 2206 longjmp(topbuf, 1); 2207 /*NOTREACHED*/ 2208 } 2209 2210 int 2211 _rl_qsort_string_compare(char **s1, char **s2) 2212 { 2213 return strcoll(*s1, *s2); 2214 } 2215 2216 HISTORY_STATE * 2217 history_get_history_state(void) 2218 { 2219 HISTORY_STATE *hs; 2220 2221 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2222 return NULL; 2223 hs->length = history_length; 2224 return hs; 2225 } 2226 2227 int 2228 /*ARGSUSED*/ 2229 rl_kill_text(int from __attribute__((__unused__)), 2230 int to __attribute__((__unused__))) 2231 { 2232 return 0; 2233 } 2234 2235 Keymap 2236 rl_make_bare_keymap(void) 2237 { 2238 return NULL; 2239 } 2240 2241 Keymap 2242 rl_get_keymap(void) 2243 { 2244 return NULL; 2245 } 2246 2247 void 2248 /*ARGSUSED*/ 2249 rl_set_keymap(Keymap k __attribute__((__unused__))) 2250 { 2251 } 2252 2253 int 2254 /*ARGSUSED*/ 2255 rl_generic_bind(int type __attribute__((__unused__)), 2256 const char * keyseq __attribute__((__unused__)), 2257 const char * data __attribute__((__unused__)), 2258 Keymap k __attribute__((__unused__))) 2259 { 2260 return 0; 2261 } 2262 2263 int 2264 /*ARGSUSED*/ 2265 rl_bind_key_in_map(int key __attribute__((__unused__)), 2266 rl_command_func_t *fun __attribute__((__unused__)), 2267 Keymap k __attribute__((__unused__))) 2268 { 2269 return 0; 2270 } 2271 2272 /* unsupported, but needed by python */ 2273 void 2274 rl_cleanup_after_signal(void) 2275 { 2276 } 2277 2278 int 2279 rl_on_new_line(void) 2280 { 2281 return 0; 2282 } 2283 2284 void 2285 rl_free_line_state(void) 2286 { 2287 } 2288