1 /* $NetBSD: readline.c,v 1.178 2022/12/02 19:23:15 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 1.178 2022/12/02 19:23:15 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdarg.h> 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <vis.h> 53 54 #include "readline/readline.h" 55 #include "el.h" 56 #include "fcns.h" 57 #include "filecomplete.h" 58 59 void rl_prep_terminal(int); 60 void rl_deprep_terminal(void); 61 62 /* for rl_complete() */ 63 #define TAB '\r' 64 65 /* see comment at the #ifdef for sense of this */ 66 /* #define GDB_411_HACK */ 67 68 /* readline compatibility stuff - look at readline sources/documentation */ 69 /* to see what these variables mean */ 70 const char *rl_library_version = "EditLine wrapper"; 71 int rl_readline_version = RL_READLINE_VERSION; 72 static char empty[] = { '\0' }; 73 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 74 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 75 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 76 const char *rl_readline_name = empty; 77 FILE *rl_instream = NULL; 78 FILE *rl_outstream = NULL; 79 int rl_point = 0; 80 int rl_end = 0; 81 char *rl_line_buffer = NULL; 82 rl_vcpfunc_t *rl_linefunc = NULL; 83 int rl_done = 0; 84 rl_hook_func_t *rl_event_hook = NULL; 85 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 86 emacs_meta_keymap, 87 emacs_ctlx_keymap; 88 /* 89 * The following is not implemented; we always catch signals in the 90 * libedit fashion: set handlers on entry to el_gets() and clear them 91 * on the way out. This simplistic approach works for most cases; if 92 * it does not work for your application, please let us know. 93 */ 94 int rl_catch_signals = 1; 95 int rl_catch_sigwinch = 1; 96 97 int history_base = 1; /* probably never subject to change */ 98 int history_length = 0; 99 int history_offset = 0; 100 int max_input_history = 0; 101 char history_expansion_char = '!'; 102 char history_subst_char = '^'; 103 char *history_no_expand_chars = expand_chars; 104 Function *history_inhibit_expansion_function = NULL; 105 char *history_arg_extract(int start, int end, const char *str); 106 107 int rl_inhibit_completion = 0; 108 int rl_attempted_completion_over = 0; 109 const char *rl_basic_word_break_characters = break_chars; 110 char *rl_completer_word_break_characters = NULL; 111 const char *rl_completer_quote_characters = NULL; 112 const char *rl_basic_quote_characters = "\"'"; 113 rl_compentry_func_t *rl_completion_entry_function = NULL; 114 char *(*rl_completion_word_break_hook)(void) = NULL; 115 rl_completion_func_t *rl_attempted_completion_function = NULL; 116 rl_hook_func_t *rl_pre_input_hook = NULL; 117 rl_hook_func_t *rl_startup1_hook = NULL; 118 int (*rl_getc_function)(FILE *) = NULL; 119 char *rl_terminal_name = NULL; 120 int rl_already_prompted = 0; 121 int rl_filename_completion_desired = 0; 122 int rl_ignore_completion_duplicates = 0; 123 int readline_echoing_p = 1; 124 int _rl_print_completions_horizontally = 0; 125 VFunction *rl_redisplay_function = NULL; 126 rl_hook_func_t *rl_startup_hook = NULL; 127 VFunction *rl_completion_display_matches_hook = NULL; 128 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 129 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 130 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 131 unsigned long rl_readline_state = RL_STATE_NONE; 132 int _rl_complete_mark_directories; 133 rl_icppfunc_t *rl_directory_completion_hook; 134 int rl_completion_suppress_append; 135 int rl_sort_completion_matches; 136 int _rl_completion_prefix_display_length; 137 int _rl_echoing_p; 138 int history_max_entries; 139 char *rl_display_prompt; 140 int rl_erase_empty_line; 141 142 /* 143 * The current prompt string. 144 */ 145 char *rl_prompt = NULL; 146 char *rl_prompt_saved = NULL; 147 /* 148 * This is set to character indicating type of completion being done by 149 * rl_complete_internal(); this is available for application completion 150 * functions. 151 */ 152 int rl_completion_type = 0; 153 154 /* 155 * If more than this number of items results from query for possible 156 * completions, we ask user if they are sure to really display the list. 157 */ 158 int rl_completion_query_items = 100; 159 160 /* 161 * List of characters which are word break characters, but should be left 162 * in the parsed text when it is passed to the completion function. 163 * Shell uses this to help determine what kind of completing to do. 164 */ 165 const char *rl_special_prefixes = NULL; 166 167 /* 168 * This is the character appended to the completed words if at the end of 169 * the line. Default is ' ' (a space). 170 */ 171 int rl_completion_append_character = ' '; 172 173 /* stuff below is used internally by libedit for readline emulation */ 174 175 static History *h = NULL; 176 static EditLine *e = NULL; 177 static rl_command_func_t *map[256]; 178 static jmp_buf topbuf; 179 180 /* internal functions */ 181 static unsigned char _el_rl_complete(EditLine *, int); 182 static unsigned char _el_rl_tstp(EditLine *, int); 183 static char *_get_prompt(EditLine *); 184 static int _getc_function(EditLine *, wchar_t *); 185 static int _history_expand_command(const char *, size_t, size_t, 186 char **); 187 static char *_rl_compat_sub(const char *, const char *, 188 const char *, int); 189 static int _rl_event_read_char(EditLine *, wchar_t *); 190 static void _rl_update_pos(void); 191 192 static HIST_ENTRY rl_he; 193 194 /* ARGSUSED */ 195 static char * 196 _get_prompt(EditLine *el __attribute__((__unused__))) 197 { 198 rl_already_prompted = 1; 199 return rl_prompt; 200 } 201 202 203 /* 204 * read one key from user defined input function 205 */ 206 static int 207 /*ARGSUSED*/ 208 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 209 { 210 int i; 211 212 i = (*rl_getc_function)(rl_instream); 213 if (i == -1) 214 return 0; 215 *c = (wchar_t)i; 216 return 1; 217 } 218 219 static void 220 _resize_fun(EditLine *el, void *a) 221 { 222 const LineInfo *li; 223 const char **ap = a; 224 225 li = el_line(el); 226 *ap = li->buffer; 227 } 228 229 static const char * 230 _default_history_file(void) 231 { 232 struct passwd *p; 233 static char *path; 234 size_t len; 235 236 if (path) 237 return path; 238 239 if ((p = getpwuid(getuid())) == NULL) 240 return NULL; 241 242 len = strlen(p->pw_dir) + sizeof("/.history"); 243 if ((path = el_malloc(len)) == NULL) 244 return NULL; 245 246 (void)snprintf(path, len, "%s/.history", p->pw_dir); 247 return path; 248 } 249 250 /* 251 * READLINE compatibility stuff 252 */ 253 254 /* 255 * Set the prompt 256 */ 257 int 258 rl_set_prompt(const char *prompt) 259 { 260 char *p; 261 262 if (!prompt) 263 prompt = ""; 264 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 265 return 0; 266 if (rl_prompt) 267 el_free(rl_prompt); 268 rl_prompt = strdup(prompt); 269 if (rl_prompt == NULL) 270 return -1; 271 272 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) { 273 /* Remove adjacent end/start markers to avoid double-escapes. */ 274 if (p[1] == RL_PROMPT_START_IGNORE) { 275 memmove(p, p + 2, 1 + strlen(p + 2)); 276 } else { 277 *p = RL_PROMPT_START_IGNORE; 278 } 279 } 280 281 return 0; 282 } 283 284 void 285 rl_save_prompt(void) 286 { 287 rl_prompt_saved = strdup(rl_prompt); 288 } 289 290 void 291 rl_restore_prompt(void) 292 { 293 if (!rl_prompt_saved) 294 return; 295 rl_prompt = rl_prompt_saved; 296 rl_prompt_saved = NULL; 297 } 298 299 /* 300 * initialize rl compat stuff 301 */ 302 int 303 rl_initialize(void) 304 { 305 HistEvent ev; 306 int editmode = 1; 307 struct termios t; 308 309 if (e != NULL) 310 el_end(e); 311 if (h != NULL) 312 history_end(h); 313 314 RL_UNSETSTATE(RL_STATE_DONE); 315 316 if (!rl_instream) 317 rl_instream = stdin; 318 if (!rl_outstream) 319 rl_outstream = stdout; 320 321 /* 322 * See if we don't really want to run the editor 323 */ 324 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 325 editmode = 0; 326 327 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 328 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 329 NO_RESET); 330 331 if (!editmode) 332 el_set(e, EL_EDITMODE, 0); 333 334 h = history_init(); 335 if (!e || !h) 336 return -1; 337 338 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 339 history_length = 0; 340 max_input_history = INT_MAX; 341 el_set(e, EL_HIST, history, h); 342 343 /* Setup resize function */ 344 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 345 346 /* setup getc function if valid */ 347 if (rl_getc_function) 348 el_set(e, EL_GETCFN, _getc_function); 349 350 /* for proper prompt printing in readline() */ 351 if (rl_set_prompt("") == -1) { 352 history_end(h); 353 el_end(e); 354 return -1; 355 } 356 el_set(e, EL_PROMPT_ESC, _get_prompt, RL_PROMPT_START_IGNORE); 357 el_set(e, EL_SIGNAL, rl_catch_signals); 358 359 /* set default mode to "emacs"-style and read setting afterwards */ 360 /* so this can be overridden */ 361 el_set(e, EL_EDITOR, "emacs"); 362 if (rl_terminal_name != NULL) 363 el_set(e, EL_TERMINAL, rl_terminal_name); 364 else 365 el_get(e, EL_TERMINAL, &rl_terminal_name); 366 367 /* 368 * Word completion - this has to go AFTER rebinding keys 369 * to emacs-style. 370 */ 371 el_set(e, EL_ADDFN, "rl_complete", 372 "ReadLine compatible completion function", 373 _el_rl_complete); 374 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 375 376 /* 377 * Send TSTP when ^Z is pressed. 378 */ 379 el_set(e, EL_ADDFN, "rl_tstp", 380 "ReadLine compatible suspend function", 381 _el_rl_tstp); 382 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 383 384 /* 385 * Set some readline compatible key-bindings. 386 */ 387 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 388 389 /* 390 * Allow the use of Home/End keys. 391 */ 392 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 393 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 394 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 395 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 396 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 397 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 398 399 /* 400 * Allow the use of the Delete/Insert keys. 401 */ 402 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 403 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 404 405 /* 406 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 407 */ 408 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 409 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 410 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 411 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 412 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 413 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 414 415 /* read settings from configuration file */ 416 el_source(e, NULL); 417 418 /* 419 * Unfortunately, some applications really do use rl_point 420 * and rl_line_buffer directly. 421 */ 422 _resize_fun(e, &rl_line_buffer); 423 _rl_update_pos(); 424 425 tty_end(e, TCSADRAIN); 426 427 return 0; 428 } 429 430 431 /* 432 * read one line from input stream and return it, chomping 433 * trailing newline (if there is any) 434 */ 435 char * 436 readline(const char *p) 437 { 438 HistEvent ev; 439 const char * volatile prompt = p; 440 int count; 441 const char *ret; 442 char *buf; 443 static int used_event_hook; 444 445 if (e == NULL || h == NULL) 446 rl_initialize(); 447 if (rl_startup_hook) { 448 (*rl_startup_hook)(); 449 } 450 tty_init(e); 451 452 453 rl_done = 0; 454 455 (void)setjmp(topbuf); 456 buf = NULL; 457 458 /* update prompt accordingly to what has been passed */ 459 if (rl_set_prompt(prompt) == -1) 460 goto out; 461 462 if (rl_pre_input_hook) 463 (*rl_pre_input_hook)(); 464 465 if (rl_event_hook && !(e->el_flags & NO_TTY)) { 466 el_set(e, EL_GETCFN, _rl_event_read_char); 467 used_event_hook = 1; 468 } 469 470 if (!rl_event_hook && used_event_hook) { 471 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 472 used_event_hook = 0; 473 } 474 475 rl_already_prompted = 0; 476 477 /* get one line from input stream */ 478 ret = el_gets(e, &count); 479 480 if (ret && count > 0) { 481 int lastidx; 482 483 buf = strdup(ret); 484 if (buf == NULL) 485 goto out; 486 lastidx = count - 1; 487 if (buf[lastidx] == '\n') 488 buf[lastidx] = '\0'; 489 } else 490 buf = NULL; 491 492 history(h, &ev, H_GETSIZE); 493 history_length = ev.num; 494 495 out: 496 tty_end(e, TCSADRAIN); 497 return buf; 498 } 499 500 /* 501 * history functions 502 */ 503 504 /* 505 * is normally called before application starts to use 506 * history expansion functions 507 */ 508 void 509 using_history(void) 510 { 511 if (h == NULL || e == NULL) 512 rl_initialize(); 513 history_offset = history_length; 514 } 515 516 517 /* 518 * substitute ``what'' with ``with'', returning resulting string; if 519 * globally == 1, substitutes all occurrences of what, otherwise only the 520 * first one 521 */ 522 static char * 523 _rl_compat_sub(const char *str, const char *what, const char *with, 524 int globally) 525 { 526 const char *s; 527 char *r, *result; 528 size_t len, with_len, what_len; 529 530 len = strlen(str); 531 with_len = strlen(with); 532 what_len = strlen(what); 533 534 /* calculate length we need for result */ 535 s = str; 536 while (*s) { 537 if (*s == *what && !strncmp(s, what, what_len)) { 538 len += with_len - what_len; 539 if (!globally) 540 break; 541 s += what_len; 542 } else 543 s++; 544 } 545 r = result = el_calloc(len + 1, sizeof(*r)); 546 if (result == NULL) 547 return NULL; 548 s = str; 549 while (*s) { 550 if (*s == *what && !strncmp(s, what, what_len)) { 551 memcpy(r, with, with_len); 552 r += with_len; 553 s += what_len; 554 if (!globally) { 555 (void)strcpy(r, s); 556 return result; 557 } 558 } else 559 *r++ = *s++; 560 } 561 *r = '\0'; 562 return result; 563 } 564 565 static char *last_search_pat; /* last !?pat[?] search pattern */ 566 static char *last_search_match; /* last !?pat[?] that matched */ 567 568 const char * 569 get_history_event(const char *cmd, int *cindex, int qchar) 570 { 571 int idx, sign, sub, num, begin, ret; 572 size_t len; 573 char *pat; 574 const char *rptr; 575 HistEvent ev; 576 577 idx = *cindex; 578 if (cmd[idx++] != history_expansion_char) 579 return NULL; 580 581 /* find out which event to take */ 582 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 583 if (history(h, &ev, H_FIRST) != 0) 584 return NULL; 585 *cindex = cmd[idx]? (idx + 1):idx; 586 return ev.str; 587 } 588 sign = 0; 589 if (cmd[idx] == '-') { 590 sign = 1; 591 idx++; 592 } 593 594 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 595 HIST_ENTRY *he; 596 597 num = 0; 598 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 599 num = num * 10 + cmd[idx] - '0'; 600 idx++; 601 } 602 if (sign) 603 num = history_length - num + history_base; 604 605 if (!(he = history_get(num))) 606 return NULL; 607 608 *cindex = idx; 609 return he->line; 610 } 611 sub = 0; 612 if (cmd[idx] == '?') { 613 sub = 1; 614 idx++; 615 } 616 begin = idx; 617 while (cmd[idx]) { 618 if (cmd[idx] == '\n') 619 break; 620 if (sub && cmd[idx] == '?') 621 break; 622 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 623 || cmd[idx] == '\t' || cmd[idx] == qchar)) 624 break; 625 idx++; 626 } 627 len = (size_t)idx - (size_t)begin; 628 if (sub && cmd[idx] == '?') 629 idx++; 630 if (sub && len == 0 && last_search_pat && *last_search_pat) 631 pat = last_search_pat; 632 else if (len == 0) 633 return NULL; 634 else { 635 if ((pat = el_calloc(len + 1, sizeof(*pat))) == NULL) 636 return NULL; 637 (void)strlcpy(pat, cmd + begin, len + 1); 638 } 639 640 if (history(h, &ev, H_CURR) != 0) { 641 if (pat != last_search_pat) 642 el_free(pat); 643 return NULL; 644 } 645 num = ev.num; 646 647 if (sub) { 648 if (pat != last_search_pat) { 649 el_free(last_search_pat); 650 last_search_pat = pat; 651 } 652 ret = history_search(pat, -1); 653 } else 654 ret = history_search_prefix(pat, -1); 655 656 if (ret == -1) { 657 /* restore to end of list on failed search */ 658 history(h, &ev, H_FIRST); 659 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 660 if (pat != last_search_pat) 661 el_free(pat); 662 return NULL; 663 } 664 665 if (sub && len) { 666 el_free(last_search_match); 667 last_search_match = strdup(pat); 668 } 669 670 if (pat != last_search_pat) 671 el_free(pat); 672 673 if (history(h, &ev, H_CURR) != 0) 674 return NULL; 675 *cindex = idx; 676 rptr = ev.str; 677 678 /* roll back to original position */ 679 (void)history(h, &ev, H_SET, num); 680 681 return rptr; 682 } 683 684 static int 685 getfrom(const char **cmdp, char **fromp, const char *search, int delim) 686 { 687 size_t size = 16; 688 size_t len = 0; 689 const char *cmd = *cmdp; 690 char *what = el_realloc(*fromp, size * sizeof(*what)); 691 if (what == NULL){ 692 el_free(*fromp); 693 *fromp = NULL; 694 return 0; 695 } 696 for (; *cmd && *cmd != delim; cmd++) { 697 if (*cmd == '\\' && cmd[1] == delim) 698 cmd++; 699 if (len - 1 >= size) { 700 char *nwhat; 701 nwhat = el_realloc(what, (size <<= 1) * sizeof(*nwhat)); 702 if (nwhat == NULL) { 703 el_free(what); 704 el_free(*fromp); 705 *cmdp = cmd; 706 *fromp = NULL; 707 return 0; 708 } 709 what = nwhat; 710 } 711 what[len++] = *cmd; 712 } 713 what[len] = '\0'; 714 *fromp = what; 715 *cmdp = cmd; 716 if (*what == '\0') { 717 el_free(what); 718 if (search) { 719 *fromp = strdup(search); 720 if (*fromp == NULL) { 721 return 0; 722 } 723 } else { 724 *fromp = NULL; 725 return -1; 726 } 727 } 728 if (!*cmd) { 729 el_free(what); 730 *fromp = NULL; 731 return -1; 732 } 733 734 cmd++; /* shift after delim */ 735 *cmdp = cmd; 736 737 if (!*cmd) { 738 el_free(what); 739 *fromp = NULL; 740 return -1; 741 } 742 return 1; 743 } 744 745 static int 746 getto(const char **cmdp, char **top, const char *from, int delim) 747 { 748 size_t size = 16; 749 size_t len = 0; 750 size_t from_len = strlen(from); 751 const char *cmd = *cmdp; 752 char *with = el_realloc(*top, size * sizeof(*with)); 753 *top = NULL; 754 if (with == NULL) 755 goto out; 756 757 for (; *cmd && *cmd != delim; cmd++) { 758 if (len + from_len + 1 >= size) { 759 char *nwith; 760 size += from_len + 1; 761 nwith = el_realloc(with, size * sizeof(*nwith)); 762 if (nwith == NULL) 763 goto out; 764 with = nwith; 765 } 766 if (*cmd == '&') { 767 /* safe */ 768 strcpy(&with[len], from); 769 len += from_len; 770 continue; 771 } 772 if (*cmd == '\\' && (*(cmd + 1) == delim || *(cmd + 1) == '&')) 773 cmd++; 774 with[len++] = *cmd; 775 } 776 if (!*cmd) 777 goto out; 778 with[len] = '\0'; 779 *top = with; 780 *cmdp = cmd; 781 return 1; 782 out: 783 el_free(with); 784 el_free(*top); 785 *top = NULL; 786 *cmdp = cmd; 787 return -1; 788 } 789 790 static void 791 replace(char **tmp, int c) 792 { 793 char *aptr; 794 if ((aptr = strrchr(*tmp, c)) == NULL) 795 return; 796 aptr = strdup(aptr + 1); // XXX: check 797 el_free(*tmp); 798 *tmp = aptr; 799 } 800 801 /* 802 * the real function doing history expansion - takes as argument command 803 * to do and data upon which the command should be executed 804 * does expansion the way I've understood readline documentation 805 * 806 * returns 0 if data was not modified, 1 if it was and 2 if the string 807 * should be only printed and not executed; in case of error, 808 * returns -1 and *result points to NULL 809 * it's the caller's responsibility to free() the string returned in *result 810 */ 811 static int 812 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 813 char **result) 814 { 815 char *tmp, *search = NULL, *aptr, delim; 816 const char *ptr, *cmd; 817 static char *from = NULL, *to = NULL; 818 int start, end, idx, has_mods = 0; 819 int p_on = 0, g_on = 0, ev; 820 821 *result = NULL; 822 aptr = NULL; 823 ptr = NULL; 824 825 /* First get event specifier */ 826 idx = 0; 827 828 if (strchr(":^*$", command[offs + 1])) { 829 char str[4]; 830 /* 831 * "!:" is shorthand for "!!:". 832 * "!^", "!*" and "!$" are shorthand for 833 * "!!:^", "!!:*" and "!!:$" respectively. 834 */ 835 str[0] = str[1] = '!'; 836 str[2] = '0'; 837 ptr = get_history_event(str, &idx, 0); 838 idx = (command[offs + 1] == ':')? 1:0; 839 has_mods = 1; 840 } else { 841 if (command[offs + 1] == '#') { 842 /* use command so far */ 843 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 844 == NULL) 845 return -1; 846 (void)strlcpy(aptr, command, offs + 1); 847 idx = 1; 848 } else { 849 int qchar; 850 851 qchar = (offs > 0 && command[offs - 1] == '"') 852 ? '"' : '\0'; 853 ptr = get_history_event(command + offs, &idx, qchar); 854 } 855 has_mods = command[offs + (size_t)idx] == ':'; 856 } 857 858 if (ptr == NULL && aptr == NULL) 859 return -1; 860 861 if (!has_mods) { 862 *result = strdup(aptr ? aptr : ptr); 863 if (aptr) 864 el_free(aptr); 865 if (*result == NULL) 866 return -1; 867 return 1; 868 } 869 870 cmd = command + offs + idx + 1; 871 872 /* Now parse any word designators */ 873 874 if (*cmd == '%') /* last word matched by ?pat? */ 875 tmp = strdup(last_search_match ? last_search_match : ""); 876 else if (strchr("^*$-0123456789", *cmd)) { 877 start = end = -1; 878 if (*cmd == '^') 879 start = end = 1, cmd++; 880 else if (*cmd == '$') 881 start = -1, cmd++; 882 else if (*cmd == '*') 883 start = 1, cmd++; 884 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 885 start = 0; 886 while (*cmd && '0' <= *cmd && *cmd <= '9') 887 start = start * 10 + *cmd++ - '0'; 888 889 if (*cmd == '-') { 890 if (isdigit((unsigned char) cmd[1])) { 891 cmd++; 892 end = 0; 893 while (*cmd && '0' <= *cmd && *cmd <= '9') 894 end = end * 10 + *cmd++ - '0'; 895 } else if (cmd[1] == '$') { 896 cmd += 2; 897 end = -1; 898 } else { 899 cmd++; 900 end = -2; 901 } 902 } else if (*cmd == '*') 903 end = -1, cmd++; 904 else 905 end = start; 906 } 907 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 908 if (tmp == NULL) { 909 (void)fprintf(rl_outstream, "%s: Bad word specifier", 910 command + offs + idx); 911 if (aptr) 912 el_free(aptr); 913 return -1; 914 } 915 } else 916 tmp = strdup(aptr? aptr:ptr); 917 918 if (aptr) 919 el_free(aptr); 920 921 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 922 *result = tmp; 923 return 1; 924 } 925 926 for (; *cmd; cmd++) { 927 switch (*cmd) { 928 case ':': 929 continue; 930 case 'h': /* remove trailing path */ 931 if ((aptr = strrchr(tmp, '/')) != NULL) 932 *aptr = '\0'; 933 continue; 934 case 't': /* remove leading path */ 935 replace(&tmp, '/'); 936 continue; 937 case 'r': /* remove trailing suffix */ 938 if ((aptr = strrchr(tmp, '.')) != NULL) 939 *aptr = '\0'; 940 continue; 941 case 'e': /* remove all but suffix */ 942 replace(&tmp, '.'); 943 continue; 944 case 'p': /* print only */ 945 p_on = 1; 946 continue; 947 case 'g': 948 g_on = 2; 949 continue; 950 case '&': 951 if (from == NULL || to == NULL) 952 continue; 953 /*FALLTHROUGH*/ 954 case 's': 955 ev = -1; 956 delim = *++cmd; 957 if (delim == '\0' || *++cmd == '\0') 958 goto out; 959 if ((ev = getfrom(&cmd, &from, search, delim)) != 1) 960 goto out; 961 if ((ev = getto(&cmd, &to, from, delim)) != 1) 962 goto out; 963 aptr = _rl_compat_sub(tmp, from, to, g_on); 964 if (aptr) { 965 el_free(tmp); 966 tmp = aptr; 967 } 968 g_on = 0; 969 cmd--; 970 continue; 971 } 972 } 973 *result = tmp; 974 return p_on ? 2 : 1; 975 out: 976 el_free(tmp); 977 return ev; 978 979 } 980 981 982 /* 983 * csh-style history expansion 984 */ 985 int 986 history_expand(char *str, char **output) 987 { 988 int ret = 0; 989 size_t idx, i, size; 990 char *tmp, *result; 991 992 if (h == NULL || e == NULL) 993 rl_initialize(); 994 995 if (history_expansion_char == 0) { 996 *output = strdup(str); 997 return 0; 998 } 999 1000 *output = NULL; 1001 if (str[0] == history_subst_char) { 1002 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 1003 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 1004 if (*output == NULL) 1005 return 0; 1006 (*output)[0] = (*output)[1] = history_expansion_char; 1007 (*output)[2] = ':'; 1008 (*output)[3] = 's'; 1009 (void)strcpy((*output) + 4, str); 1010 str = *output; 1011 } else { 1012 *output = strdup(str); 1013 if (*output == NULL) 1014 return 0; 1015 } 1016 1017 #define ADD_STRING(what, len, fr) \ 1018 { \ 1019 if (idx + len + 1 > size) { \ 1020 char *nresult = el_realloc(result, \ 1021 (size += len + 1) * sizeof(*nresult)); \ 1022 if (nresult == NULL) { \ 1023 el_free(*output); \ 1024 el_free(fr); \ 1025 return 0; \ 1026 } \ 1027 result = nresult; \ 1028 } \ 1029 (void)strlcpy(&result[idx], what, len + 1); \ 1030 idx += len; \ 1031 } 1032 1033 result = NULL; 1034 size = idx = 0; 1035 tmp = NULL; 1036 for (i = 0; str[i];) { 1037 int qchar, loop_again; 1038 size_t len, start, j; 1039 1040 qchar = 0; 1041 loop_again = 1; 1042 start = j = i; 1043 loop: 1044 for (; str[j]; j++) { 1045 if (str[j] == '\\' && 1046 str[j + 1] == history_expansion_char) { 1047 len = strlen(&str[j + 1]) + 1; 1048 memmove(&str[j], &str[j + 1], len); 1049 continue; 1050 } 1051 if (!loop_again) { 1052 if (isspace((unsigned char) str[j]) 1053 || str[j] == qchar) 1054 break; 1055 } 1056 if (str[j] == history_expansion_char 1057 && !strchr(history_no_expand_chars, str[j + 1]) 1058 && (!history_inhibit_expansion_function || 1059 (*history_inhibit_expansion_function)(str, 1060 (int)j) == 0)) 1061 break; 1062 } 1063 1064 if (str[j] && loop_again) { 1065 i = j; 1066 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1067 j++; 1068 if (str[j] == history_expansion_char) 1069 j++; 1070 loop_again = 0; 1071 goto loop; 1072 } 1073 len = i - start; 1074 ADD_STRING(&str[start], len, NULL); 1075 1076 if (str[i] == '\0' || str[i] != history_expansion_char) { 1077 len = j - i; 1078 ADD_STRING(&str[i], len, NULL); 1079 if (start == 0) 1080 ret = 0; 1081 else 1082 ret = 1; 1083 break; 1084 } 1085 ret = _history_expand_command (str, i, (j - i), &tmp); 1086 if (ret > 0 && tmp) { 1087 len = strlen(tmp); 1088 ADD_STRING(tmp, len, tmp); 1089 } 1090 if (tmp) { 1091 el_free(tmp); 1092 tmp = NULL; 1093 } 1094 i = j; 1095 } 1096 1097 /* ret is 2 for "print only" option */ 1098 if (ret == 2) { 1099 add_history(result); 1100 #ifdef GDB_411_HACK 1101 /* gdb 4.11 has been shipped with readline, where */ 1102 /* history_expand() returned -1 when the line */ 1103 /* should not be executed; in readline 2.1+ */ 1104 /* it should return 2 in such a case */ 1105 ret = -1; 1106 #endif 1107 } 1108 el_free(*output); 1109 *output = result; 1110 1111 return ret; 1112 } 1113 1114 /* 1115 * Return a string consisting of arguments of "str" from "start" to "end". 1116 */ 1117 char * 1118 history_arg_extract(int start, int end, const char *str) 1119 { 1120 size_t i, len, max; 1121 char **arr, *result = NULL; 1122 1123 arr = history_tokenize(str); 1124 if (!arr) 1125 return NULL; 1126 if (arr && *arr == NULL) 1127 goto out; 1128 1129 for (max = 0; arr[max]; max++) 1130 continue; 1131 max--; 1132 1133 if (start == '$') 1134 start = (int)max; 1135 if (end == '$') 1136 end = (int)max; 1137 if (end < 0) 1138 end = (int)max + end + 1; 1139 if (start < 0) 1140 start = end; 1141 1142 if (start < 0 || end < 0 || (size_t)start > max || 1143 (size_t)end > max || start > end) 1144 goto out; 1145 1146 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1147 len += strlen(arr[i]) + 1; 1148 len++; 1149 result = el_calloc(len, sizeof(*result)); 1150 if (result == NULL) 1151 goto out; 1152 1153 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1154 (void)strcpy(result + len, arr[i]); 1155 len += strlen(arr[i]); 1156 if (i < (size_t)end) 1157 result[len++] = ' '; 1158 } 1159 result[len] = '\0'; 1160 1161 out: 1162 for (i = 0; arr[i]; i++) 1163 el_free(arr[i]); 1164 el_free(arr); 1165 1166 return result; 1167 } 1168 1169 /* 1170 * Parse the string into individual tokens, 1171 * similar to how shell would do it. 1172 */ 1173 char ** 1174 history_tokenize(const char *str) 1175 { 1176 int size = 1, idx = 0, i, start; 1177 size_t len; 1178 char **result = NULL, *temp, delim = '\0'; 1179 1180 for (i = 0; str[i];) { 1181 while (isspace((unsigned char) str[i])) 1182 i++; 1183 start = i; 1184 for (; str[i];) { 1185 if (str[i] == '\\') { 1186 if (str[i+1] != '\0') 1187 i++; 1188 } else if (str[i] == delim) 1189 delim = '\0'; 1190 else if (!delim && 1191 (isspace((unsigned char) str[i]) || 1192 strchr("()<>;&|$", str[i]))) 1193 break; 1194 else if (!delim && strchr("'`\"", str[i])) 1195 delim = str[i]; 1196 if (str[i]) 1197 i++; 1198 } 1199 1200 if (idx + 2 >= size) { 1201 char **nresult; 1202 size <<= 1; 1203 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1204 if (nresult == NULL) { 1205 el_free(result); 1206 return NULL; 1207 } 1208 result = nresult; 1209 } 1210 len = (size_t)i - (size_t)start; 1211 temp = el_calloc(len + 1, sizeof(*temp)); 1212 if (temp == NULL) { 1213 for (i = 0; i < idx; i++) 1214 el_free(result[i]); 1215 el_free(result); 1216 return NULL; 1217 } 1218 (void)strlcpy(temp, &str[start], len + 1); 1219 result[idx++] = temp; 1220 result[idx] = NULL; 1221 if (str[i]) 1222 i++; 1223 } 1224 return result; 1225 } 1226 1227 1228 /* 1229 * limit size of history record to ``max'' events 1230 */ 1231 void 1232 stifle_history(int max) 1233 { 1234 HistEvent ev; 1235 HIST_ENTRY *he; 1236 1237 if (h == NULL || e == NULL) 1238 rl_initialize(); 1239 1240 if (history(h, &ev, H_SETSIZE, max) == 0) { 1241 max_input_history = max; 1242 if (history_length > max) 1243 history_base = history_length - max; 1244 while (history_length > max) { 1245 he = remove_history(0); 1246 el_free(he->data); 1247 el_free((void *)(unsigned long)he->line); 1248 el_free(he); 1249 } 1250 } 1251 } 1252 1253 1254 /* 1255 * "unlimit" size of history - set the limit to maximum allowed int value 1256 */ 1257 int 1258 unstifle_history(void) 1259 { 1260 HistEvent ev; 1261 int omax; 1262 1263 history(h, &ev, H_SETSIZE, INT_MAX); 1264 omax = max_input_history; 1265 max_input_history = INT_MAX; 1266 return omax; /* some value _must_ be returned */ 1267 } 1268 1269 1270 int 1271 history_is_stifled(void) 1272 { 1273 1274 /* cannot return true answer */ 1275 return max_input_history != INT_MAX; 1276 } 1277 1278 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1279 1280 int 1281 history_truncate_file (const char *filename, int nlines) 1282 { 1283 int ret = 0; 1284 FILE *fp, *tp; 1285 char template[sizeof(_history_tmp_template)]; 1286 char buf[4096]; 1287 int fd; 1288 char *cp; 1289 off_t off; 1290 int count = 0; 1291 ssize_t left = 0; 1292 1293 if (filename == NULL && (filename = _default_history_file()) == NULL) 1294 return errno; 1295 if ((fp = fopen(filename, "r+")) == NULL) 1296 return errno; 1297 strcpy(template, _history_tmp_template); 1298 if ((fd = mkstemp(template)) == -1) { 1299 ret = errno; 1300 goto out1; 1301 } 1302 1303 if ((tp = fdopen(fd, "r+")) == NULL) { 1304 close(fd); 1305 ret = errno; 1306 goto out2; 1307 } 1308 1309 for(;;) { 1310 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1311 if (ferror(fp)) { 1312 ret = errno; 1313 break; 1314 } 1315 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1316 (off_t)-1) { 1317 ret = errno; 1318 break; 1319 } 1320 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1321 if (ferror(fp)) { 1322 ret = errno; 1323 break; 1324 } 1325 if (left == 0) { 1326 count--; 1327 left = sizeof(buf); 1328 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1329 != 1) { 1330 ret = errno; 1331 break; 1332 } 1333 fflush(tp); 1334 break; 1335 } 1336 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1337 ret = errno; 1338 break; 1339 } 1340 count++; 1341 } 1342 if (ret) 1343 goto out3; 1344 cp = buf + left - 1; 1345 if(*cp != '\n') 1346 cp++; 1347 for(;;) { 1348 while (--cp >= buf) { 1349 if (*cp == '\n') { 1350 if (--nlines == 0) { 1351 if (++cp >= buf + sizeof(buf)) { 1352 count++; 1353 cp = buf; 1354 } 1355 break; 1356 } 1357 } 1358 } 1359 if (nlines <= 0 || count == 0) 1360 break; 1361 count--; 1362 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1363 ret = errno; 1364 break; 1365 } 1366 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1367 if (ferror(tp)) { 1368 ret = errno; 1369 break; 1370 } 1371 ret = EAGAIN; 1372 break; 1373 } 1374 cp = buf + sizeof(buf); 1375 } 1376 1377 if (ret || nlines > 0) 1378 goto out3; 1379 1380 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1381 ret = errno; 1382 goto out3; 1383 } 1384 1385 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1386 (off_t)-1) { 1387 ret = errno; 1388 goto out3; 1389 } 1390 1391 for(;;) { 1392 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1393 if (ferror(fp)) 1394 ret = errno; 1395 break; 1396 } 1397 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1398 ret = errno; 1399 break; 1400 } 1401 } 1402 fflush(fp); 1403 if((off = ftello(fp)) > 0) 1404 (void)ftruncate(fileno(fp), off); 1405 out3: 1406 fclose(tp); 1407 out2: 1408 unlink(template); 1409 out1: 1410 fclose(fp); 1411 1412 return ret; 1413 } 1414 1415 1416 /* 1417 * read history from a file given 1418 */ 1419 int 1420 read_history(const char *filename) 1421 { 1422 HistEvent ev; 1423 1424 if (h == NULL || e == NULL) 1425 rl_initialize(); 1426 if (filename == NULL && (filename = _default_history_file()) == NULL) 1427 return errno; 1428 errno = 0; 1429 if (history(h, &ev, H_LOAD, filename) == -1) 1430 return errno ? errno : EINVAL; 1431 if (history(h, &ev, H_GETSIZE) == 0) 1432 history_length = ev.num; 1433 if (history_length < 0) 1434 return EINVAL; 1435 return 0; 1436 } 1437 1438 1439 /* 1440 * write history to a file given 1441 */ 1442 int 1443 write_history(const char *filename) 1444 { 1445 HistEvent ev; 1446 1447 if (h == NULL || e == NULL) 1448 rl_initialize(); 1449 if (filename == NULL && (filename = _default_history_file()) == NULL) 1450 return errno; 1451 return history(h, &ev, H_SAVE, filename) == -1 ? 1452 (errno ? errno : EINVAL) : 0; 1453 } 1454 1455 int 1456 append_history(int n, const char *filename) 1457 { 1458 HistEvent ev; 1459 FILE *fp; 1460 1461 if (h == NULL || e == NULL) 1462 rl_initialize(); 1463 if (filename == NULL && (filename = _default_history_file()) == NULL) 1464 return errno; 1465 1466 if ((fp = fopen(filename, "a")) == NULL) 1467 return errno; 1468 1469 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1470 int serrno = errno ? errno : EINVAL; 1471 fclose(fp); 1472 return serrno; 1473 } 1474 fclose(fp); 1475 return 0; 1476 } 1477 1478 /* 1479 * returns history ``num''th event 1480 * 1481 * returned pointer points to static variable 1482 */ 1483 HIST_ENTRY * 1484 history_get(int num) 1485 { 1486 static HIST_ENTRY she; 1487 HistEvent ev; 1488 int curr_num; 1489 1490 if (h == NULL || e == NULL) 1491 rl_initialize(); 1492 1493 if (num < history_base) 1494 return NULL; 1495 1496 /* save current position */ 1497 if (history(h, &ev, H_CURR) != 0) 1498 return NULL; 1499 curr_num = ev.num; 1500 1501 /* 1502 * use H_DELDATA to set to nth history (without delete) by passing 1503 * (void **)-1 -- as in history_set_pos 1504 */ 1505 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1506 goto out; 1507 1508 /* get current entry */ 1509 if (history(h, &ev, H_CURR) != 0) 1510 goto out; 1511 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1512 goto out; 1513 she.line = ev.str; 1514 1515 /* restore pointer to where it was */ 1516 (void)history(h, &ev, H_SET, curr_num); 1517 1518 return &she; 1519 1520 out: 1521 /* restore pointer to where it was */ 1522 (void)history(h, &ev, H_SET, curr_num); 1523 return NULL; 1524 } 1525 1526 1527 /* 1528 * add the line to history table 1529 */ 1530 int 1531 add_history(const char *line) 1532 { 1533 HistEvent ev; 1534 1535 if (h == NULL || e == NULL) 1536 rl_initialize(); 1537 1538 if (history(h, &ev, H_ENTER, line) == -1) 1539 return 0; 1540 1541 (void)history(h, &ev, H_GETSIZE); 1542 if (ev.num == history_length) 1543 history_base++; 1544 else { 1545 history_offset++; 1546 history_length = ev.num; 1547 } 1548 return 0; 1549 } 1550 1551 1552 /* 1553 * remove the specified entry from the history list and return it. 1554 */ 1555 HIST_ENTRY * 1556 remove_history(int num) 1557 { 1558 HIST_ENTRY *he; 1559 HistEvent ev; 1560 1561 if (h == NULL || e == NULL) 1562 rl_initialize(); 1563 1564 if ((he = el_malloc(sizeof(*he))) == NULL) 1565 return NULL; 1566 1567 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1568 el_free(he); 1569 return NULL; 1570 } 1571 1572 he->line = ev.str; 1573 if (history(h, &ev, H_GETSIZE) == 0) 1574 history_length = ev.num; 1575 1576 return he; 1577 } 1578 1579 1580 /* 1581 * replace the line and data of the num-th entry 1582 */ 1583 HIST_ENTRY * 1584 replace_history_entry(int num, const char *line, histdata_t data) 1585 { 1586 HIST_ENTRY *he; 1587 HistEvent ev; 1588 int curr_num; 1589 1590 if (h == NULL || e == NULL) 1591 rl_initialize(); 1592 1593 /* save current position */ 1594 if (history(h, &ev, H_CURR) != 0) 1595 return NULL; 1596 curr_num = ev.num; 1597 1598 /* start from the oldest */ 1599 if (history(h, &ev, H_LAST) != 0) 1600 return NULL; /* error */ 1601 1602 if ((he = el_malloc(sizeof(*he))) == NULL) 1603 return NULL; 1604 1605 /* look forwards for event matching specified offset */ 1606 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1607 goto out; 1608 1609 he->line = ev.str; 1610 if (he->line == NULL) 1611 goto out; 1612 1613 if (history(h, &ev, H_REPLACE, line, data)) 1614 goto out; 1615 1616 /* restore pointer to where it was */ 1617 if (history(h, &ev, H_SET, curr_num)) 1618 goto out; 1619 1620 return he; 1621 out: 1622 el_free(he); 1623 return NULL; 1624 } 1625 1626 /* 1627 * clear the history list - delete all entries 1628 */ 1629 void 1630 clear_history(void) 1631 { 1632 HistEvent ev; 1633 1634 if (h == NULL || e == NULL) 1635 rl_initialize(); 1636 1637 (void)history(h, &ev, H_CLEAR); 1638 history_offset = history_length = 0; 1639 } 1640 1641 1642 /* 1643 * returns offset of the current history event 1644 */ 1645 int 1646 where_history(void) 1647 { 1648 return history_offset; 1649 } 1650 1651 static HIST_ENTRY **_history_listp; 1652 static HIST_ENTRY *_history_list; 1653 1654 HIST_ENTRY ** 1655 history_list(void) 1656 { 1657 HistEvent ev; 1658 HIST_ENTRY **nlp, *nl; 1659 int i; 1660 1661 if (history(h, &ev, H_LAST) != 0) 1662 return NULL; 1663 1664 if ((nlp = el_realloc(_history_listp, 1665 ((size_t)history_length + 1) * sizeof(*nlp))) == NULL) 1666 return NULL; 1667 _history_listp = nlp; 1668 1669 if ((nl = el_realloc(_history_list, 1670 (size_t)history_length * sizeof(*nl))) == NULL) 1671 return NULL; 1672 _history_list = nl; 1673 1674 i = 0; 1675 do { 1676 _history_listp[i] = &_history_list[i]; 1677 _history_list[i].line = ev.str; 1678 _history_list[i].data = NULL; 1679 if (i++ == history_length) 1680 abort(); 1681 } while (history(h, &ev, H_PREV) == 0); 1682 _history_listp[i] = NULL; 1683 return _history_listp; 1684 } 1685 1686 /* 1687 * returns current history event or NULL if there is no such event 1688 */ 1689 HIST_ENTRY * 1690 current_history(void) 1691 { 1692 HistEvent ev; 1693 1694 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1695 return NULL; 1696 1697 rl_he.line = ev.str; 1698 rl_he.data = NULL; 1699 return &rl_he; 1700 } 1701 1702 1703 /* 1704 * returns total number of bytes history events' data are using 1705 */ 1706 int 1707 history_total_bytes(void) 1708 { 1709 HistEvent ev; 1710 int curr_num; 1711 size_t size; 1712 1713 if (history(h, &ev, H_CURR) != 0) 1714 return -1; 1715 curr_num = ev.num; 1716 1717 (void)history(h, &ev, H_FIRST); 1718 size = 0; 1719 do 1720 size += strlen(ev.str) * sizeof(*ev.str); 1721 while (history(h, &ev, H_NEXT) == 0); 1722 1723 /* get to the same position as before */ 1724 history(h, &ev, H_PREV_EVENT, curr_num); 1725 1726 return (int)size; 1727 } 1728 1729 1730 /* 1731 * sets the position in the history list to ``pos'' 1732 */ 1733 int 1734 history_set_pos(int pos) 1735 { 1736 if (pos >= history_length || pos < 0) 1737 return 0; 1738 1739 history_offset = pos; 1740 return 1; 1741 } 1742 1743 1744 /* 1745 * returns previous event in history and shifts pointer accordingly 1746 * Note that readline and editline define directions in opposite ways. 1747 */ 1748 HIST_ENTRY * 1749 previous_history(void) 1750 { 1751 HistEvent ev; 1752 1753 if (history_offset == 0) 1754 return NULL; 1755 1756 if (history(h, &ev, H_LAST) != 0) 1757 return NULL; 1758 1759 history_offset--; 1760 return current_history(); 1761 } 1762 1763 1764 /* 1765 * returns next event in history and shifts pointer accordingly 1766 */ 1767 HIST_ENTRY * 1768 next_history(void) 1769 { 1770 HistEvent ev; 1771 1772 if (history_offset >= history_length) 1773 return NULL; 1774 1775 if (history(h, &ev, H_LAST) != 0) 1776 return NULL; 1777 1778 history_offset++; 1779 return current_history(); 1780 } 1781 1782 1783 /* 1784 * searches for first history event containing the str 1785 */ 1786 int 1787 history_search(const char *str, int direction) 1788 { 1789 HistEvent ev; 1790 const char *strp; 1791 int curr_num; 1792 1793 if (history(h, &ev, H_CURR) != 0) 1794 return -1; 1795 curr_num = ev.num; 1796 1797 for (;;) { 1798 if ((strp = strstr(ev.str, str)) != NULL) 1799 return (int)(strp - ev.str); 1800 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1801 break; 1802 } 1803 (void)history(h, &ev, H_SET, curr_num); 1804 return -1; 1805 } 1806 1807 1808 /* 1809 * searches for first history event beginning with str 1810 */ 1811 int 1812 history_search_prefix(const char *str, int direction) 1813 { 1814 HistEvent ev; 1815 1816 return (history(h, &ev, direction < 0 ? 1817 H_PREV_STR : H_NEXT_STR, str)); 1818 } 1819 1820 1821 /* 1822 * search for event in history containing str, starting at offset 1823 * abs(pos); continue backward, if pos<0, forward otherwise 1824 */ 1825 /* ARGSUSED */ 1826 int 1827 history_search_pos(const char *str, 1828 int direction __attribute__((__unused__)), int pos) 1829 { 1830 HistEvent ev; 1831 int curr_num, off; 1832 1833 off = (pos > 0) ? pos : -pos; 1834 pos = (pos > 0) ? 1 : -1; 1835 1836 if (history(h, &ev, H_CURR) != 0) 1837 return -1; 1838 curr_num = ev.num; 1839 1840 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1841 return -1; 1842 1843 for (;;) { 1844 if (strstr(ev.str, str)) 1845 return off; 1846 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1847 break; 1848 } 1849 1850 /* set "current" pointer back to previous state */ 1851 (void)history(h, &ev, 1852 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1853 1854 return -1; 1855 } 1856 1857 1858 /********************************/ 1859 /* completion functions */ 1860 1861 char * 1862 tilde_expand(char *name) 1863 { 1864 return fn_tilde_expand(name); 1865 } 1866 1867 char * 1868 filename_completion_function(const char *name, int state) 1869 { 1870 return fn_filename_completion_function(name, state); 1871 } 1872 1873 /* 1874 * a completion generator for usernames; returns _first_ username 1875 * which starts with supplied text 1876 * text contains a partial username preceded by random character 1877 * (usually '~'); state resets search from start (??? should we do that anyway) 1878 * it's the caller's responsibility to free the returned value 1879 */ 1880 char * 1881 username_completion_function(const char *text, int state) 1882 { 1883 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1884 struct passwd pwres; 1885 char pwbuf[1024]; 1886 #endif 1887 struct passwd *pass = NULL; 1888 1889 if (text[0] == '\0') 1890 return NULL; 1891 1892 if (*text == '~') 1893 text++; 1894 1895 if (state == 0) 1896 setpwent(); 1897 1898 while ( 1899 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1900 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1901 #else 1902 (pass = getpwent()) != NULL 1903 #endif 1904 && text[0] == pass->pw_name[0] 1905 && strcmp(text, pass->pw_name) == 0) 1906 continue; 1907 1908 if (pass == NULL) { 1909 endpwent(); 1910 return NULL; 1911 } 1912 return strdup(pass->pw_name); 1913 } 1914 1915 1916 /* 1917 * el-compatible wrapper to send TSTP on ^Z 1918 */ 1919 /* ARGSUSED */ 1920 static unsigned char 1921 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1922 { 1923 (void)kill(0, SIGTSTP); 1924 return CC_NORM; 1925 } 1926 1927 static const char * 1928 /*ARGSUSED*/ 1929 _rl_completion_append_character_function(const char *dummy 1930 __attribute__((__unused__))) 1931 { 1932 static char buf[2]; 1933 buf[0] = (char)rl_completion_append_character; 1934 buf[1] = '\0'; 1935 return buf; 1936 } 1937 1938 1939 /* 1940 * Display list of strings in columnar format on readline's output stream. 1941 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1942 * 'max' is maximum length of string in 'matches'. 1943 */ 1944 void 1945 rl_display_match_list(char **matches, int len, int max) 1946 { 1947 1948 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1949 _rl_completion_append_character_function); 1950 } 1951 1952 /* 1953 * complete word at current point 1954 */ 1955 /* ARGSUSED */ 1956 int 1957 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1958 { 1959 static ct_buffer_t wbreak_conv, sprefix_conv; 1960 const char *breakchars; 1961 1962 if (h == NULL || e == NULL) 1963 rl_initialize(); 1964 1965 if (rl_inhibit_completion) { 1966 char arr[2]; 1967 arr[0] = (char)invoking_key; 1968 arr[1] = '\0'; 1969 el_insertstr(e, arr); 1970 return CC_REFRESH; 1971 } 1972 1973 if (rl_completion_word_break_hook != NULL) 1974 breakchars = (*rl_completion_word_break_hook)(); 1975 else 1976 breakchars = rl_basic_word_break_characters; 1977 1978 _rl_update_pos(); 1979 1980 /* Just look at how many global variables modify this operation! */ 1981 return fn_complete(e, 1982 (rl_compentry_func_t *)rl_completion_entry_function, 1983 rl_attempted_completion_function, 1984 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1985 ct_decode_string(breakchars, &sprefix_conv), 1986 _rl_completion_append_character_function, 1987 (size_t)rl_completion_query_items, 1988 &rl_completion_type, &rl_attempted_completion_over, 1989 &rl_point, &rl_end); 1990 1991 1992 } 1993 1994 1995 /* ARGSUSED */ 1996 static unsigned char 1997 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1998 { 1999 return (unsigned char)rl_complete(0, ch); 2000 } 2001 2002 /* 2003 * misc other functions 2004 */ 2005 2006 /* 2007 * bind key c to readline-type function func 2008 */ 2009 int 2010 rl_bind_key(int c, rl_command_func_t *func) 2011 { 2012 int retval = -1; 2013 2014 if (h == NULL || e == NULL) 2015 rl_initialize(); 2016 2017 if (func == rl_insert) { 2018 /* XXX notice there is no range checking of ``c'' */ 2019 e->el_map.key[c] = ED_INSERT; 2020 retval = 0; 2021 } 2022 return retval; 2023 } 2024 2025 2026 /* 2027 * read one key from input - handles chars pushed back 2028 * to input stream also 2029 */ 2030 int 2031 rl_read_key(void) 2032 { 2033 char fooarr[2 * sizeof(int)]; 2034 2035 if (e == NULL || h == NULL) 2036 rl_initialize(); 2037 2038 return el_getc(e, fooarr); 2039 } 2040 2041 2042 /* 2043 * reset the terminal 2044 */ 2045 /* ARGSUSED */ 2046 int 2047 rl_reset_terminal(const char *p __attribute__((__unused__))) 2048 { 2049 2050 if (h == NULL || e == NULL) 2051 rl_initialize(); 2052 el_reset(e); 2053 return 0; 2054 } 2055 2056 2057 /* 2058 * insert character ``c'' back into input stream, ``count'' times 2059 */ 2060 int 2061 rl_insert(int count, int c) 2062 { 2063 char arr[2]; 2064 2065 if (h == NULL || e == NULL) 2066 rl_initialize(); 2067 2068 /* XXX - int -> char conversion can lose on multichars */ 2069 arr[0] = (char)c; 2070 arr[1] = '\0'; 2071 2072 for (; count > 0; count--) 2073 el_push(e, arr); 2074 2075 return 0; 2076 } 2077 2078 int 2079 rl_insert_text(const char *text) 2080 { 2081 if (!text || *text == 0) 2082 return 0; 2083 2084 if (h == NULL || e == NULL) 2085 rl_initialize(); 2086 2087 if (el_insertstr(e, text) < 0) 2088 return 0; 2089 return (int)strlen(text); 2090 } 2091 2092 /*ARGSUSED*/ 2093 int 2094 rl_newline(int count __attribute__((__unused__)), 2095 int c __attribute__((__unused__))) 2096 { 2097 /* 2098 * Readline-4.0 appears to ignore the args. 2099 */ 2100 return rl_insert(1, '\n'); 2101 } 2102 2103 /*ARGSUSED*/ 2104 static unsigned char 2105 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2106 { 2107 if (map[c] == NULL) 2108 return CC_ERROR; 2109 2110 _rl_update_pos(); 2111 2112 (*map[c])(1, c); 2113 2114 /* If rl_done was set by the above call, deal with it here */ 2115 if (rl_done) 2116 return CC_EOF; 2117 2118 return CC_NORM; 2119 } 2120 2121 int 2122 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2123 { 2124 char dest[8]; 2125 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2126 return -1; 2127 map[(unsigned char)c] = fun; 2128 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2129 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2130 el_set(e, EL_BIND, dest, name, NULL); 2131 return 0; 2132 } 2133 2134 void 2135 rl_callback_read_char(void) 2136 { 2137 int count = 0, done = 0; 2138 const char *buf = el_gets(e, &count); 2139 char *wbuf; 2140 2141 el_set(e, EL_UNBUFFERED, 1); 2142 if (buf == NULL || count-- <= 0) 2143 return; 2144 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2145 done = 1; 2146 if (buf[count] == '\n' || buf[count] == '\r') 2147 done = 2; 2148 2149 if (done && rl_linefunc != NULL) { 2150 el_set(e, EL_UNBUFFERED, 0); 2151 if (done == 2) { 2152 if ((wbuf = strdup(buf)) != NULL) 2153 wbuf[count] = '\0'; 2154 RL_SETSTATE(RL_STATE_DONE); 2155 } else 2156 wbuf = NULL; 2157 (*(void (*)(const char *))rl_linefunc)(wbuf); 2158 } 2159 _rl_update_pos(); 2160 } 2161 2162 void 2163 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2164 { 2165 if (e == NULL) { 2166 rl_initialize(); 2167 } 2168 (void)rl_set_prompt(prompt); 2169 rl_linefunc = linefunc; 2170 el_set(e, EL_UNBUFFERED, 1); 2171 } 2172 2173 void 2174 rl_callback_handler_remove(void) 2175 { 2176 el_set(e, EL_UNBUFFERED, 0); 2177 rl_linefunc = NULL; 2178 } 2179 2180 void 2181 rl_redisplay(void) 2182 { 2183 char a[2]; 2184 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2185 a[1] = '\0'; 2186 el_push(e, a); 2187 rl_forced_update_display(); 2188 } 2189 2190 int 2191 rl_get_previous_history(int count, int key) 2192 { 2193 char a[2]; 2194 a[0] = (char)key; 2195 a[1] = '\0'; 2196 while (count--) 2197 el_push(e, a); 2198 return 0; 2199 } 2200 2201 void 2202 /*ARGSUSED*/ 2203 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2204 { 2205 el_set(e, EL_PREP_TERM, 1); 2206 } 2207 2208 void 2209 rl_deprep_terminal(void) 2210 { 2211 el_set(e, EL_PREP_TERM, 0); 2212 } 2213 2214 int 2215 rl_read_init_file(const char *s) 2216 { 2217 return el_source(e, s); 2218 } 2219 2220 int 2221 rl_parse_and_bind(const char *line) 2222 { 2223 const char **argv; 2224 int argc; 2225 Tokenizer *tok; 2226 2227 tok = tok_init(NULL); 2228 tok_str(tok, line, &argc, &argv); 2229 argc = el_parse(e, argc, argv); 2230 tok_end(tok); 2231 return argc ? 1 : 0; 2232 } 2233 2234 int 2235 rl_variable_bind(const char *var, const char *value) 2236 { 2237 /* 2238 * The proper return value is undocument, but this is what the 2239 * readline source seems to do. 2240 */ 2241 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2242 } 2243 2244 int 2245 rl_stuff_char(int c) 2246 { 2247 char buf[2]; 2248 2249 buf[0] = (char)c; 2250 buf[1] = '\0'; 2251 el_insertstr(e, buf); 2252 return 1; 2253 } 2254 2255 static int 2256 _rl_event_read_char(EditLine *el, wchar_t *wc) 2257 { 2258 char ch; 2259 int n; 2260 ssize_t num_read = 0; 2261 2262 ch = '\0'; 2263 *wc = L'\0'; 2264 while (rl_event_hook) { 2265 2266 (*rl_event_hook)(); 2267 2268 #if defined(FIONREAD) 2269 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2270 return -1; 2271 if (n) 2272 num_read = read(el->el_infd, &ch, (size_t)1); 2273 else 2274 num_read = 0; 2275 #elif defined(F_SETFL) && defined(O_NDELAY) 2276 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2277 return -1; 2278 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2279 return -1; 2280 num_read = read(el->el_infd, &ch, 1); 2281 if (fcntl(el->el_infd, F_SETFL, n)) 2282 return -1; 2283 #else 2284 /* not non-blocking, but what you gonna do? */ 2285 num_read = read(el->el_infd, &ch, 1); 2286 return -1; 2287 #endif 2288 2289 if (num_read < 0 && errno == EAGAIN) 2290 continue; 2291 if (num_read == 0) 2292 continue; 2293 break; 2294 } 2295 if (!rl_event_hook) 2296 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2297 *wc = (wchar_t)ch; 2298 return (int)num_read; 2299 } 2300 2301 static void 2302 _rl_update_pos(void) 2303 { 2304 const LineInfo *li = el_line(e); 2305 2306 rl_point = (int)(li->cursor - li->buffer); 2307 rl_end = (int)(li->lastchar - li->buffer); 2308 rl_line_buffer[rl_end] = '\0'; 2309 } 2310 2311 char * 2312 rl_copy_text(int from, int to) 2313 { 2314 const LineInfo *li; 2315 size_t len; 2316 char * out; 2317 2318 if (h == NULL || e == NULL) 2319 rl_initialize(); 2320 2321 li = el_line(e); 2322 2323 if (from > to) 2324 return NULL; 2325 2326 if (li->buffer + from > li->lastchar) 2327 from = (int)(li->lastchar - li->buffer); 2328 2329 if (li->buffer + to > li->lastchar) 2330 to = (int)(li->lastchar - li->buffer); 2331 2332 len = (size_t)(to - from); 2333 out = el_malloc((size_t)len + 1); 2334 if (out == NULL) 2335 return NULL; 2336 (void)strlcpy(out, li->buffer + from , len); 2337 2338 return out; 2339 } 2340 2341 void 2342 rl_replace_line(const char * text, int clear_undo __attribute__((__unused__))) 2343 { 2344 if (!text || *text == 0) 2345 return; 2346 2347 if (h == NULL || e == NULL) 2348 rl_initialize(); 2349 2350 el_replacestr(e, text); 2351 } 2352 2353 int 2354 rl_delete_text(int start, int end) 2355 { 2356 2357 if (h == NULL || e == NULL) 2358 rl_initialize(); 2359 2360 return el_deletestr1(e, start, end); 2361 } 2362 2363 void 2364 rl_get_screen_size(int *rows, int *cols) 2365 { 2366 if (rows) 2367 el_get(e, EL_GETTC, "li", rows); 2368 if (cols) 2369 el_get(e, EL_GETTC, "co", cols); 2370 } 2371 2372 #define MAX_MESSAGE 160 2373 void 2374 rl_message(const char *format, ...) 2375 { 2376 char msg[MAX_MESSAGE]; 2377 va_list args; 2378 2379 va_start(args, format); 2380 vsnprintf(msg, sizeof(msg), format, args); 2381 va_end(args); 2382 2383 rl_set_prompt(msg); 2384 rl_forced_update_display(); 2385 } 2386 2387 void 2388 rl_set_screen_size(int rows, int cols) 2389 { 2390 char buf[64]; 2391 (void)snprintf(buf, sizeof(buf), "%d", rows); 2392 el_set(e, EL_SETTC, "li", buf, NULL); 2393 (void)snprintf(buf, sizeof(buf), "%d", cols); 2394 el_set(e, EL_SETTC, "co", buf, NULL); 2395 } 2396 2397 char ** 2398 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2399 { 2400 size_t len, max, i, j, min; 2401 char **list, *match, *a, *b; 2402 2403 len = 1; 2404 max = 10; 2405 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2406 return NULL; 2407 2408 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2409 list[len++] = match; 2410 if (len == max) { 2411 char **nl; 2412 max += 10; 2413 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2414 goto out; 2415 list = nl; 2416 } 2417 } 2418 if (len == 1) 2419 goto out; 2420 list[len] = NULL; 2421 if (len == 2) { 2422 if ((list[0] = strdup(list[1])) == NULL) 2423 goto out; 2424 return list; 2425 } 2426 qsort(&list[1], len - 1, sizeof(*list), 2427 (int (*)(const void *, const void *)) strcmp); 2428 min = SIZE_MAX; 2429 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2430 b = list[i + 1]; 2431 for (j = 0; a[j] && a[j] == b[j]; j++) 2432 continue; 2433 if (min > j) 2434 min = j; 2435 } 2436 if (min == 0 && *str) { 2437 if ((list[0] = strdup(str)) == NULL) 2438 goto out; 2439 } else { 2440 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2441 goto out; 2442 (void)memcpy(list[0], list[1], min); 2443 list[0][min] = '\0'; 2444 } 2445 return list; 2446 2447 out: 2448 el_free(list); 2449 return NULL; 2450 } 2451 2452 char * 2453 rl_filename_completion_function (const char *text, int state) 2454 { 2455 return fn_filename_completion_function(text, state); 2456 } 2457 2458 void 2459 rl_forced_update_display(void) 2460 { 2461 el_set(e, EL_REFRESH); 2462 } 2463 2464 int 2465 _rl_abort_internal(void) 2466 { 2467 el_beep(e); 2468 longjmp(topbuf, 1); 2469 /*NOTREACHED*/ 2470 } 2471 2472 int 2473 _rl_qsort_string_compare(char **s1, char **s2) 2474 { 2475 return strcoll(*s1, *s2); 2476 } 2477 2478 HISTORY_STATE * 2479 history_get_history_state(void) 2480 { 2481 HISTORY_STATE *hs; 2482 2483 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2484 return NULL; 2485 hs->length = history_length; 2486 return hs; 2487 } 2488 2489 int 2490 /*ARGSUSED*/ 2491 rl_kill_text(int from __attribute__((__unused__)), 2492 int to __attribute__((__unused__))) 2493 { 2494 return 0; 2495 } 2496 2497 Keymap 2498 rl_make_bare_keymap(void) 2499 { 2500 return NULL; 2501 } 2502 2503 Keymap 2504 rl_get_keymap(void) 2505 { 2506 return NULL; 2507 } 2508 2509 void 2510 /*ARGSUSED*/ 2511 rl_set_keymap(Keymap k __attribute__((__unused__))) 2512 { 2513 } 2514 2515 int 2516 /*ARGSUSED*/ 2517 rl_generic_bind(int type __attribute__((__unused__)), 2518 const char * keyseq __attribute__((__unused__)), 2519 const char * data __attribute__((__unused__)), 2520 Keymap k __attribute__((__unused__))) 2521 { 2522 return 0; 2523 } 2524 2525 int 2526 /*ARGSUSED*/ 2527 rl_bind_key_in_map(int key __attribute__((__unused__)), 2528 rl_command_func_t *fun __attribute__((__unused__)), 2529 Keymap k __attribute__((__unused__))) 2530 { 2531 return 0; 2532 } 2533 2534 int 2535 rl_set_key(const char *keyseq __attribute__((__unused__)), 2536 rl_command_func_t *function __attribute__((__unused__)), 2537 Keymap k __attribute__((__unused__))) 2538 { 2539 return 0; 2540 } 2541 2542 /* unsupported, but needed by python */ 2543 void 2544 rl_cleanup_after_signal(void) 2545 { 2546 } 2547 2548 int 2549 rl_on_new_line(void) 2550 { 2551 return 0; 2552 } 2553 2554 void 2555 rl_free_line_state(void) 2556 { 2557 } 2558 2559 int 2560 /*ARGSUSED*/ 2561 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2562 { 2563 return 0; 2564 } 2565 2566 void 2567 rl_resize_terminal(void) 2568 { 2569 el_resize(e); 2570 } 2571 2572 void 2573 rl_reset_after_signal(void) 2574 { 2575 if (rl_prep_term_function) 2576 (*rl_prep_term_function)(); 2577 } 2578 2579 void 2580 rl_echo_signal_char(int sig) 2581 { 2582 int c = tty_get_signal_character(e, sig); 2583 if (c == -1) 2584 return; 2585 re_putc(e, c, 0); 2586 } 2587 2588 int 2589 rl_crlf(void) 2590 { 2591 re_putc(e, '\n', 0); 2592 return 0; 2593 } 2594 2595 int 2596 rl_ding(void) 2597 { 2598 re_putc(e, '\a', 0); 2599 return 0; 2600 } 2601 2602 int 2603 rl_abort(int count, int key) 2604 { 2605 return count && key ? 0 : 0; 2606 } 2607 2608 int 2609 rl_set_keymap_name(const char *name, Keymap k) 2610 { 2611 return name && k ? 0 : 0; 2612 } 2613 2614 histdata_t 2615 free_history_entry(HIST_ENTRY *he) 2616 { 2617 return he ? NULL : NULL; 2618 } 2619 2620 void 2621 _rl_erase_entire_line(void) 2622 { 2623 } 2624