1 /* $NetBSD: readline.c,v 1.176 2022/09/21 01:33:53 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 1.176 2022/09/21 01:33:53 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdarg.h> 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <vis.h> 53 54 #include "editline/readline.h" 55 #include "el.h" 56 #include "fcns.h" 57 #include "filecomplete.h" 58 59 #if !defined(SIZE_T_MAX) 60 # define SIZE_T_MAX (size_t)(-1) 61 #endif 62 63 void rl_prep_terminal(int); 64 void rl_deprep_terminal(void); 65 66 /* for rl_complete() */ 67 #define TAB '\r' 68 69 /* see comment at the #ifdef for sense of this */ 70 /* #define GDB_411_HACK */ 71 72 /* readline compatibility stuff - look at readline sources/documentation */ 73 /* to see what these variables mean */ 74 const char *rl_library_version = "EditLine wrapper"; 75 int rl_readline_version = RL_READLINE_VERSION; 76 static char empty[] = { '\0' }; 77 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 78 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 79 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 80 const char *rl_readline_name = empty; 81 FILE *rl_instream = NULL; 82 FILE *rl_outstream = NULL; 83 int rl_point = 0; 84 int rl_end = 0; 85 char *rl_line_buffer = NULL; 86 rl_vcpfunc_t *rl_linefunc = NULL; 87 int rl_done = 0; 88 rl_hook_func_t *rl_event_hook = NULL; 89 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 90 emacs_meta_keymap, 91 emacs_ctlx_keymap; 92 /* 93 * The following is not implemented; we always catch signals in the 94 * libedit fashion: set handlers on entry to el_gets() and clear them 95 * on the way out. This simplistic approach works for most cases; if 96 * it does not work for your application, please let us know. 97 */ 98 int rl_catch_signals = 1; 99 int rl_catch_sigwinch = 1; 100 101 int history_base = 1; /* probably never subject to change */ 102 int history_length = 0; 103 int history_offset = 0; 104 int max_input_history = 0; 105 char history_expansion_char = '!'; 106 char history_subst_char = '^'; 107 char *history_no_expand_chars = expand_chars; 108 Function *history_inhibit_expansion_function = NULL; 109 char *history_arg_extract(int start, int end, const char *str); 110 111 int rl_inhibit_completion = 0; 112 int rl_attempted_completion_over = 0; 113 const char *rl_basic_word_break_characters = break_chars; 114 char *rl_completer_word_break_characters = NULL; 115 const char *rl_completer_quote_characters = NULL; 116 const char *rl_basic_quote_characters = "\"'"; 117 rl_compentry_func_t *rl_completion_entry_function = NULL; 118 char *(*rl_completion_word_break_hook)(void) = NULL; 119 rl_completion_func_t *rl_attempted_completion_function = NULL; 120 rl_hook_func_t *rl_pre_input_hook = NULL; 121 rl_hook_func_t *rl_startup1_hook = NULL; 122 int (*rl_getc_function)(FILE *) = NULL; 123 char *rl_terminal_name = NULL; 124 int rl_already_prompted = 0; 125 int rl_filename_completion_desired = 0; 126 int rl_ignore_completion_duplicates = 0; 127 int readline_echoing_p = 1; 128 int _rl_print_completions_horizontally = 0; 129 VFunction *rl_redisplay_function = NULL; 130 rl_hook_func_t *rl_startup_hook = NULL; 131 VFunction *rl_completion_display_matches_hook = NULL; 132 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 133 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 134 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 135 unsigned long rl_readline_state = RL_STATE_NONE; 136 int _rl_complete_mark_directories; 137 rl_icppfunc_t *rl_directory_completion_hook; 138 int rl_completion_suppress_append; 139 int rl_sort_completion_matches; 140 int _rl_completion_prefix_display_length; 141 int _rl_echoing_p; 142 int history_max_entries; 143 char *rl_display_prompt; 144 int rl_erase_empty_line; 145 146 /* 147 * The current prompt string. 148 */ 149 char *rl_prompt = NULL; 150 char *rl_prompt_saved = NULL; 151 /* 152 * This is set to character indicating type of completion being done by 153 * rl_complete_internal(); this is available for application completion 154 * functions. 155 */ 156 int rl_completion_type = 0; 157 158 /* 159 * If more than this number of items results from query for possible 160 * completions, we ask user if they are sure to really display the list. 161 */ 162 int rl_completion_query_items = 100; 163 164 /* 165 * List of characters which are word break characters, but should be left 166 * in the parsed text when it is passed to the completion function. 167 * Shell uses this to help determine what kind of completing to do. 168 */ 169 const char *rl_special_prefixes = NULL; 170 171 /* 172 * This is the character appended to the completed words if at the end of 173 * the line. Default is ' ' (a space). 174 */ 175 int rl_completion_append_character = ' '; 176 177 /* stuff below is used internally by libedit for readline emulation */ 178 179 static History *h = NULL; 180 static EditLine *e = NULL; 181 static rl_command_func_t *map[256]; 182 static jmp_buf topbuf; 183 184 /* internal functions */ 185 static unsigned char _el_rl_complete(EditLine *, int); 186 static unsigned char _el_rl_tstp(EditLine *, int); 187 static char *_get_prompt(EditLine *); 188 static int _getc_function(EditLine *, wchar_t *); 189 static int _history_expand_command(const char *, size_t, size_t, 190 char **); 191 static char *_rl_compat_sub(const char *, const char *, 192 const char *, int); 193 static int _rl_event_read_char(EditLine *, wchar_t *); 194 static void _rl_update_pos(void); 195 196 static HIST_ENTRY rl_he; 197 198 /* ARGSUSED */ 199 static char * 200 _get_prompt(EditLine *el __attribute__((__unused__))) 201 { 202 rl_already_prompted = 1; 203 return rl_prompt; 204 } 205 206 207 /* 208 * read one key from user defined input function 209 */ 210 static int 211 /*ARGSUSED*/ 212 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 213 { 214 int i; 215 216 i = (*rl_getc_function)(rl_instream); 217 if (i == -1) 218 return 0; 219 *c = (wchar_t)i; 220 return 1; 221 } 222 223 static void 224 _resize_fun(EditLine *el, void *a) 225 { 226 const LineInfo *li; 227 const char **ap = a; 228 229 li = el_line(el); 230 *ap = li->buffer; 231 } 232 233 static const char * 234 _default_history_file(void) 235 { 236 struct passwd *p; 237 static char *path; 238 size_t len; 239 240 if (path) 241 return path; 242 243 if ((p = getpwuid(getuid())) == NULL) 244 return NULL; 245 246 len = strlen(p->pw_dir) + sizeof("/.history"); 247 if ((path = malloc(len)) == NULL) 248 return NULL; 249 250 (void)snprintf(path, len, "%s/.history", p->pw_dir); 251 return path; 252 } 253 254 /* 255 * READLINE compatibility stuff 256 */ 257 258 /* 259 * Set the prompt 260 */ 261 int 262 rl_set_prompt(const char *prompt) 263 { 264 char *p; 265 266 if (!prompt) 267 prompt = ""; 268 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 269 return 0; 270 if (rl_prompt) 271 el_free(rl_prompt); 272 rl_prompt = strdup(prompt); 273 if (rl_prompt == NULL) 274 return -1; 275 276 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) { 277 /* Remove adjacent end/start markers to avoid double-escapes. */ 278 if (p[1] == RL_PROMPT_START_IGNORE) { 279 memmove(p, p + 2, 1 + strlen(p + 2)); 280 } else { 281 *p = RL_PROMPT_START_IGNORE; 282 } 283 } 284 285 return 0; 286 } 287 288 void 289 rl_save_prompt(void) 290 { 291 rl_prompt_saved = strdup(rl_prompt); 292 } 293 294 void 295 rl_restore_prompt(void) 296 { 297 if (!rl_prompt_saved) 298 return; 299 rl_prompt = rl_prompt_saved; 300 rl_prompt_saved = NULL; 301 } 302 303 /* 304 * initialize rl compat stuff 305 */ 306 int 307 rl_initialize(void) 308 { 309 HistEvent ev; 310 int editmode = 1; 311 struct termios t; 312 313 if (e != NULL) 314 el_end(e); 315 if (h != NULL) 316 history_end(h); 317 318 RL_UNSETSTATE(RL_STATE_DONE); 319 320 if (!rl_instream) 321 rl_instream = stdin; 322 if (!rl_outstream) 323 rl_outstream = stdout; 324 325 /* 326 * See if we don't really want to run the editor 327 */ 328 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 329 editmode = 0; 330 331 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 332 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 333 NO_RESET); 334 335 if (!editmode) 336 el_set(e, EL_EDITMODE, 0); 337 338 h = history_init(); 339 if (!e || !h) 340 return -1; 341 342 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 343 history_length = 0; 344 max_input_history = INT_MAX; 345 el_set(e, EL_HIST, history, h); 346 347 /* Setup resize function */ 348 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 349 350 /* setup getc function if valid */ 351 if (rl_getc_function) 352 el_set(e, EL_GETCFN, _getc_function); 353 354 /* for proper prompt printing in readline() */ 355 if (rl_set_prompt("") == -1) { 356 history_end(h); 357 el_end(e); 358 return -1; 359 } 360 el_set(e, EL_PROMPT_ESC, _get_prompt, RL_PROMPT_START_IGNORE); 361 el_set(e, EL_SIGNAL, rl_catch_signals); 362 363 /* set default mode to "emacs"-style and read setting afterwards */ 364 /* so this can be overridden */ 365 el_set(e, EL_EDITOR, "emacs"); 366 if (rl_terminal_name != NULL) 367 el_set(e, EL_TERMINAL, rl_terminal_name); 368 else 369 el_get(e, EL_TERMINAL, &rl_terminal_name); 370 371 /* 372 * Word completion - this has to go AFTER rebinding keys 373 * to emacs-style. 374 */ 375 el_set(e, EL_ADDFN, "rl_complete", 376 "ReadLine compatible completion function", 377 _el_rl_complete); 378 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 379 380 /* 381 * Send TSTP when ^Z is pressed. 382 */ 383 el_set(e, EL_ADDFN, "rl_tstp", 384 "ReadLine compatible suspend function", 385 _el_rl_tstp); 386 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 387 388 /* 389 * Set some readline compatible key-bindings. 390 */ 391 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 392 393 /* 394 * Allow the use of Home/End keys. 395 */ 396 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 397 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 398 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 399 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 400 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 401 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 402 403 /* 404 * Allow the use of the Delete/Insert keys. 405 */ 406 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 407 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 408 409 /* 410 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 411 */ 412 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 413 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 414 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 415 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 416 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 417 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 418 419 /* read settings from configuration file */ 420 el_source(e, NULL); 421 422 /* 423 * Unfortunately, some applications really do use rl_point 424 * and rl_line_buffer directly. 425 */ 426 _resize_fun(e, &rl_line_buffer); 427 _rl_update_pos(); 428 429 tty_end(e, TCSADRAIN); 430 431 return 0; 432 } 433 434 435 /* 436 * read one line from input stream and return it, chomping 437 * trailing newline (if there is any) 438 */ 439 char * 440 readline(const char *p) 441 { 442 HistEvent ev; 443 const char * volatile prompt = p; 444 int count; 445 const char *ret; 446 char *buf; 447 static int used_event_hook; 448 449 if (e == NULL || h == NULL) 450 rl_initialize(); 451 if (rl_startup_hook) { 452 (*rl_startup_hook)(); 453 } 454 tty_init(e); 455 456 457 rl_done = 0; 458 459 (void)setjmp(topbuf); 460 buf = NULL; 461 462 /* update prompt accordingly to what has been passed */ 463 if (rl_set_prompt(prompt) == -1) 464 goto out; 465 466 if (rl_pre_input_hook) 467 (*rl_pre_input_hook)(); 468 469 if (rl_event_hook && !(e->el_flags & NO_TTY)) { 470 el_set(e, EL_GETCFN, _rl_event_read_char); 471 used_event_hook = 1; 472 } 473 474 if (!rl_event_hook && used_event_hook) { 475 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 476 used_event_hook = 0; 477 } 478 479 rl_already_prompted = 0; 480 481 /* get one line from input stream */ 482 ret = el_gets(e, &count); 483 484 if (ret && count > 0) { 485 int lastidx; 486 487 buf = strdup(ret); 488 if (buf == NULL) 489 goto out; 490 lastidx = count - 1; 491 if (buf[lastidx] == '\n') 492 buf[lastidx] = '\0'; 493 } else 494 buf = NULL; 495 496 history(h, &ev, H_GETSIZE); 497 history_length = ev.num; 498 499 out: 500 tty_end(e, TCSADRAIN); 501 return buf; 502 } 503 504 /* 505 * history functions 506 */ 507 508 /* 509 * is normally called before application starts to use 510 * history expansion functions 511 */ 512 void 513 using_history(void) 514 { 515 if (h == NULL || e == NULL) 516 rl_initialize(); 517 history_offset = history_length; 518 } 519 520 521 /* 522 * substitute ``what'' with ``with'', returning resulting string; if 523 * globally == 1, substitutes all occurrences of what, otherwise only the 524 * first one 525 */ 526 static char * 527 _rl_compat_sub(const char *str, const char *what, const char *with, 528 int globally) 529 { 530 const char *s; 531 char *r, *result; 532 size_t len, with_len, what_len; 533 534 len = strlen(str); 535 with_len = strlen(with); 536 what_len = strlen(what); 537 538 /* calculate length we need for result */ 539 s = str; 540 while (*s) { 541 if (*s == *what && !strncmp(s, what, what_len)) { 542 len += with_len - what_len; 543 if (!globally) 544 break; 545 s += what_len; 546 } else 547 s++; 548 } 549 r = result = el_calloc(len + 1, sizeof(*r)); 550 if (result == NULL) 551 return NULL; 552 s = str; 553 while (*s) { 554 if (*s == *what && !strncmp(s, what, what_len)) { 555 memcpy(r, with, with_len); 556 r += with_len; 557 s += what_len; 558 if (!globally) { 559 (void)strcpy(r, s); 560 return result; 561 } 562 } else 563 *r++ = *s++; 564 } 565 *r = '\0'; 566 return result; 567 } 568 569 static char *last_search_pat; /* last !?pat[?] search pattern */ 570 static char *last_search_match; /* last !?pat[?] that matched */ 571 572 const char * 573 get_history_event(const char *cmd, int *cindex, int qchar) 574 { 575 int idx, sign, sub, num, begin, ret; 576 size_t len; 577 char *pat; 578 const char *rptr; 579 HistEvent ev; 580 581 idx = *cindex; 582 if (cmd[idx++] != history_expansion_char) 583 return NULL; 584 585 /* find out which event to take */ 586 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 587 if (history(h, &ev, H_FIRST) != 0) 588 return NULL; 589 *cindex = cmd[idx]? (idx + 1):idx; 590 return ev.str; 591 } 592 sign = 0; 593 if (cmd[idx] == '-') { 594 sign = 1; 595 idx++; 596 } 597 598 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 599 HIST_ENTRY *he; 600 601 num = 0; 602 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 603 num = num * 10 + cmd[idx] - '0'; 604 idx++; 605 } 606 if (sign) 607 num = history_length - num + history_base; 608 609 if (!(he = history_get(num))) 610 return NULL; 611 612 *cindex = idx; 613 return he->line; 614 } 615 sub = 0; 616 if (cmd[idx] == '?') { 617 sub = 1; 618 idx++; 619 } 620 begin = idx; 621 while (cmd[idx]) { 622 if (cmd[idx] == '\n') 623 break; 624 if (sub && cmd[idx] == '?') 625 break; 626 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 627 || cmd[idx] == '\t' || cmd[idx] == qchar)) 628 break; 629 idx++; 630 } 631 len = (size_t)idx - (size_t)begin; 632 if (sub && cmd[idx] == '?') 633 idx++; 634 if (sub && len == 0 && last_search_pat && *last_search_pat) 635 pat = last_search_pat; 636 else if (len == 0) 637 return NULL; 638 else { 639 if ((pat = el_calloc(len + 1, sizeof(*pat))) == NULL) 640 return NULL; 641 (void)strlcpy(pat, cmd + begin, len + 1); 642 } 643 644 if (history(h, &ev, H_CURR) != 0) { 645 if (pat != last_search_pat) 646 el_free(pat); 647 return NULL; 648 } 649 num = ev.num; 650 651 if (sub) { 652 if (pat != last_search_pat) { 653 el_free(last_search_pat); 654 last_search_pat = pat; 655 } 656 ret = history_search(pat, -1); 657 } else 658 ret = history_search_prefix(pat, -1); 659 660 if (ret == -1) { 661 /* restore to end of list on failed search */ 662 history(h, &ev, H_FIRST); 663 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 664 if (pat != last_search_pat) 665 el_free(pat); 666 return NULL; 667 } 668 669 if (sub && len) { 670 el_free(last_search_match); 671 last_search_match = strdup(pat); 672 } 673 674 if (pat != last_search_pat) 675 el_free(pat); 676 677 if (history(h, &ev, H_CURR) != 0) 678 return NULL; 679 *cindex = idx; 680 rptr = ev.str; 681 682 /* roll back to original position */ 683 (void)history(h, &ev, H_SET, num); 684 685 return rptr; 686 } 687 688 static int 689 getfrom(const char **cmdp, char **fromp, const char *search, int delim) 690 { 691 size_t size = 16; 692 size_t len = 0; 693 const char *cmd = *cmdp; 694 char *what = el_realloc(*fromp, size * sizeof(*what)); 695 if (what == NULL){ 696 el_free(*fromp); 697 *fromp = NULL; 698 return 0; 699 } 700 for (; *cmd && *cmd != delim; cmd++) { 701 if (*cmd == '\\' && cmd[1] == delim) 702 cmd++; 703 if (len - 1 >= size) { 704 char *nwhat; 705 nwhat = el_realloc(what, (size <<= 1) * sizeof(*nwhat)); 706 if (nwhat == NULL) { 707 el_free(what); 708 el_free(*fromp); 709 *cmdp = cmd; 710 *fromp = NULL; 711 return 0; 712 } 713 what = nwhat; 714 } 715 what[len++] = *cmd; 716 } 717 what[len] = '\0'; 718 *fromp = what; 719 *cmdp = cmd; 720 if (*what == '\0') { 721 el_free(what); 722 if (search) { 723 *fromp = strdup(search); 724 if (*fromp == NULL) { 725 return 0; 726 } 727 } else { 728 *fromp = NULL; 729 return -1; 730 } 731 } 732 if (!*cmd) { 733 el_free(what); 734 *fromp = NULL; 735 return -1; 736 } 737 738 cmd++; /* shift after delim */ 739 *cmdp = cmd; 740 741 if (!*cmd) { 742 el_free(what); 743 *fromp = NULL; 744 return -1; 745 } 746 return 1; 747 } 748 749 static int 750 getto(const char **cmdp, char **top, const char *from, int delim) 751 { 752 size_t size = 16; 753 size_t len = 0; 754 size_t from_len = strlen(from); 755 const char *cmd = *cmdp; 756 char *with = el_realloc(*top, size * sizeof(*with)); 757 *top = NULL; 758 if (with == NULL) 759 goto out; 760 761 for (; *cmd && *cmd != delim; cmd++) { 762 if (len + from_len + 1 >= size) { 763 char *nwith; 764 size += from_len + 1; 765 nwith = el_realloc(with, size * sizeof(*nwith)); 766 if (nwith == NULL) 767 goto out; 768 with = nwith; 769 } 770 if (*cmd == '&') { 771 /* safe */ 772 strcpy(&with[len], from); 773 len += from_len; 774 continue; 775 } 776 if (*cmd == '\\' && (*(cmd + 1) == delim || *(cmd + 1) == '&')) 777 cmd++; 778 with[len++] = *cmd; 779 } 780 if (!*cmd) 781 goto out; 782 with[len] = '\0'; 783 *top = with; 784 *cmdp = cmd; 785 return 1; 786 out: 787 el_free(with); 788 el_free(*top); 789 *top = NULL; 790 *cmdp = cmd; 791 return -1; 792 } 793 794 static void 795 replace(char **tmp, int c) 796 { 797 char *aptr; 798 if ((aptr = strrchr(*tmp, c)) == NULL) 799 return; 800 aptr = strdup(aptr + 1); // XXX: check 801 el_free(*tmp); 802 *tmp = aptr; 803 } 804 805 /* 806 * the real function doing history expansion - takes as argument command 807 * to do and data upon which the command should be executed 808 * does expansion the way I've understood readline documentation 809 * 810 * returns 0 if data was not modified, 1 if it was and 2 if the string 811 * should be only printed and not executed; in case of error, 812 * returns -1 and *result points to NULL 813 * it's the caller's responsibility to free() the string returned in *result 814 */ 815 static int 816 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 817 char **result) 818 { 819 char *tmp, *search = NULL, *aptr, delim; 820 const char *ptr, *cmd; 821 static char *from = NULL, *to = NULL; 822 int start, end, idx, has_mods = 0; 823 int p_on = 0, g_on = 0, ev; 824 825 *result = NULL; 826 aptr = NULL; 827 ptr = NULL; 828 829 /* First get event specifier */ 830 idx = 0; 831 832 if (strchr(":^*$", command[offs + 1])) { 833 char str[4]; 834 /* 835 * "!:" is shorthand for "!!:". 836 * "!^", "!*" and "!$" are shorthand for 837 * "!!:^", "!!:*" and "!!:$" respectively. 838 */ 839 str[0] = str[1] = '!'; 840 str[2] = '0'; 841 ptr = get_history_event(str, &idx, 0); 842 idx = (command[offs + 1] == ':')? 1:0; 843 has_mods = 1; 844 } else { 845 if (command[offs + 1] == '#') { 846 /* use command so far */ 847 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 848 == NULL) 849 return -1; 850 (void)strlcpy(aptr, command, offs + 1); 851 idx = 1; 852 } else { 853 int qchar; 854 855 qchar = (offs > 0 && command[offs - 1] == '"') 856 ? '"' : '\0'; 857 ptr = get_history_event(command + offs, &idx, qchar); 858 } 859 has_mods = command[offs + (size_t)idx] == ':'; 860 } 861 862 if (ptr == NULL && aptr == NULL) 863 return -1; 864 865 if (!has_mods) { 866 *result = strdup(aptr ? aptr : ptr); 867 if (aptr) 868 el_free(aptr); 869 if (*result == NULL) 870 return -1; 871 return 1; 872 } 873 874 cmd = command + offs + idx + 1; 875 876 /* Now parse any word designators */ 877 878 if (*cmd == '%') /* last word matched by ?pat? */ 879 tmp = strdup(last_search_match ? last_search_match : ""); 880 else if (strchr("^*$-0123456789", *cmd)) { 881 start = end = -1; 882 if (*cmd == '^') 883 start = end = 1, cmd++; 884 else if (*cmd == '$') 885 start = -1, cmd++; 886 else if (*cmd == '*') 887 start = 1, cmd++; 888 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 889 start = 0; 890 while (*cmd && '0' <= *cmd && *cmd <= '9') 891 start = start * 10 + *cmd++ - '0'; 892 893 if (*cmd == '-') { 894 if (isdigit((unsigned char) cmd[1])) { 895 cmd++; 896 end = 0; 897 while (*cmd && '0' <= *cmd && *cmd <= '9') 898 end = end * 10 + *cmd++ - '0'; 899 } else if (cmd[1] == '$') { 900 cmd += 2; 901 end = -1; 902 } else { 903 cmd++; 904 end = -2; 905 } 906 } else if (*cmd == '*') 907 end = -1, cmd++; 908 else 909 end = start; 910 } 911 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 912 if (tmp == NULL) { 913 (void)fprintf(rl_outstream, "%s: Bad word specifier", 914 command + offs + idx); 915 if (aptr) 916 el_free(aptr); 917 return -1; 918 } 919 } else 920 tmp = strdup(aptr? aptr:ptr); 921 922 if (aptr) 923 el_free(aptr); 924 925 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 926 *result = tmp; 927 return 1; 928 } 929 930 for (; *cmd; cmd++) { 931 switch (*cmd) { 932 case ':': 933 continue; 934 case 'h': /* remove trailing path */ 935 if ((aptr = strrchr(tmp, '/')) != NULL) 936 *aptr = '\0'; 937 continue; 938 case 't': /* remove leading path */ 939 replace(&tmp, '/'); 940 continue; 941 case 'r': /* remove trailing suffix */ 942 if ((aptr = strrchr(tmp, '.')) != NULL) 943 *aptr = '\0'; 944 continue; 945 case 'e': /* remove all but suffix */ 946 replace(&tmp, '.'); 947 continue; 948 case 'p': /* print only */ 949 p_on = 1; 950 continue; 951 case 'g': 952 g_on = 2; 953 continue; 954 case '&': 955 if (from == NULL || to == NULL) 956 continue; 957 /*FALLTHROUGH*/ 958 case 's': 959 ev = -1; 960 delim = *++cmd; 961 if (delim == '\0' || *++cmd == '\0') 962 goto out; 963 if ((ev = getfrom(&cmd, &from, search, delim)) != 1) 964 goto out; 965 if ((ev = getto(&cmd, &to, from, delim)) != 1) 966 goto out; 967 aptr = _rl_compat_sub(tmp, from, to, g_on); 968 if (aptr) { 969 el_free(tmp); 970 tmp = aptr; 971 } 972 g_on = 0; 973 cmd--; 974 continue; 975 } 976 } 977 *result = tmp; 978 return p_on ? 2 : 1; 979 out: 980 el_free(tmp); 981 return ev; 982 983 } 984 985 986 /* 987 * csh-style history expansion 988 */ 989 int 990 history_expand(char *str, char **output) 991 { 992 int ret = 0; 993 size_t idx, i, size; 994 char *tmp, *result; 995 996 if (h == NULL || e == NULL) 997 rl_initialize(); 998 999 if (history_expansion_char == 0) { 1000 *output = strdup(str); 1001 return 0; 1002 } 1003 1004 *output = NULL; 1005 if (str[0] == history_subst_char) { 1006 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 1007 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 1008 if (*output == NULL) 1009 return 0; 1010 (*output)[0] = (*output)[1] = history_expansion_char; 1011 (*output)[2] = ':'; 1012 (*output)[3] = 's'; 1013 (void)strcpy((*output) + 4, str); 1014 str = *output; 1015 } else { 1016 *output = strdup(str); 1017 if (*output == NULL) 1018 return 0; 1019 } 1020 1021 #define ADD_STRING(what, len, fr) \ 1022 { \ 1023 if (idx + len + 1 > size) { \ 1024 char *nresult = el_realloc(result, \ 1025 (size += len + 1) * sizeof(*nresult)); \ 1026 if (nresult == NULL) { \ 1027 el_free(*output); \ 1028 el_free(fr); \ 1029 return 0; \ 1030 } \ 1031 result = nresult; \ 1032 } \ 1033 (void)strlcpy(&result[idx], what, len + 1); \ 1034 idx += len; \ 1035 } 1036 1037 result = NULL; 1038 size = idx = 0; 1039 tmp = NULL; 1040 for (i = 0; str[i];) { 1041 int qchar, loop_again; 1042 size_t len, start, j; 1043 1044 qchar = 0; 1045 loop_again = 1; 1046 start = j = i; 1047 loop: 1048 for (; str[j]; j++) { 1049 if (str[j] == '\\' && 1050 str[j + 1] == history_expansion_char) { 1051 len = strlen(&str[j + 1]) + 1; 1052 memmove(&str[j], &str[j + 1], len); 1053 continue; 1054 } 1055 if (!loop_again) { 1056 if (isspace((unsigned char) str[j]) 1057 || str[j] == qchar) 1058 break; 1059 } 1060 if (str[j] == history_expansion_char 1061 && !strchr(history_no_expand_chars, str[j + 1]) 1062 && (!history_inhibit_expansion_function || 1063 (*history_inhibit_expansion_function)(str, 1064 (int)j) == 0)) 1065 break; 1066 } 1067 1068 if (str[j] && loop_again) { 1069 i = j; 1070 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1071 j++; 1072 if (str[j] == history_expansion_char) 1073 j++; 1074 loop_again = 0; 1075 goto loop; 1076 } 1077 len = i - start; 1078 ADD_STRING(&str[start], len, NULL); 1079 1080 if (str[i] == '\0' || str[i] != history_expansion_char) { 1081 len = j - i; 1082 ADD_STRING(&str[i], len, NULL); 1083 if (start == 0) 1084 ret = 0; 1085 else 1086 ret = 1; 1087 break; 1088 } 1089 ret = _history_expand_command (str, i, (j - i), &tmp); 1090 if (ret > 0 && tmp) { 1091 len = strlen(tmp); 1092 ADD_STRING(tmp, len, tmp); 1093 } 1094 if (tmp) { 1095 el_free(tmp); 1096 tmp = NULL; 1097 } 1098 i = j; 1099 } 1100 1101 /* ret is 2 for "print only" option */ 1102 if (ret == 2) { 1103 add_history(result); 1104 #ifdef GDB_411_HACK 1105 /* gdb 4.11 has been shipped with readline, where */ 1106 /* history_expand() returned -1 when the line */ 1107 /* should not be executed; in readline 2.1+ */ 1108 /* it should return 2 in such a case */ 1109 ret = -1; 1110 #endif 1111 } 1112 el_free(*output); 1113 *output = result; 1114 1115 return ret; 1116 } 1117 1118 /* 1119 * Return a string consisting of arguments of "str" from "start" to "end". 1120 */ 1121 char * 1122 history_arg_extract(int start, int end, const char *str) 1123 { 1124 size_t i, len, max; 1125 char **arr, *result = NULL; 1126 1127 arr = history_tokenize(str); 1128 if (!arr) 1129 return NULL; 1130 if (arr && *arr == NULL) 1131 goto out; 1132 1133 for (max = 0; arr[max]; max++) 1134 continue; 1135 max--; 1136 1137 if (start == '$') 1138 start = (int)max; 1139 if (end == '$') 1140 end = (int)max; 1141 if (end < 0) 1142 end = (int)max + end + 1; 1143 if (start < 0) 1144 start = end; 1145 1146 if (start < 0 || end < 0 || (size_t)start > max || 1147 (size_t)end > max || start > end) 1148 goto out; 1149 1150 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1151 len += strlen(arr[i]) + 1; 1152 len++; 1153 result = el_calloc(len, sizeof(*result)); 1154 if (result == NULL) 1155 goto out; 1156 1157 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1158 (void)strcpy(result + len, arr[i]); 1159 len += strlen(arr[i]); 1160 if (i < (size_t)end) 1161 result[len++] = ' '; 1162 } 1163 result[len] = '\0'; 1164 1165 out: 1166 for (i = 0; arr[i]; i++) 1167 el_free(arr[i]); 1168 el_free(arr); 1169 1170 return result; 1171 } 1172 1173 /* 1174 * Parse the string into individual tokens, 1175 * similar to how shell would do it. 1176 */ 1177 char ** 1178 history_tokenize(const char *str) 1179 { 1180 int size = 1, idx = 0, i, start; 1181 size_t len; 1182 char **result = NULL, *temp, delim = '\0'; 1183 1184 for (i = 0; str[i];) { 1185 while (isspace((unsigned char) str[i])) 1186 i++; 1187 start = i; 1188 for (; str[i];) { 1189 if (str[i] == '\\') { 1190 if (str[i+1] != '\0') 1191 i++; 1192 } else if (str[i] == delim) 1193 delim = '\0'; 1194 else if (!delim && 1195 (isspace((unsigned char) str[i]) || 1196 strchr("()<>;&|$", str[i]))) 1197 break; 1198 else if (!delim && strchr("'`\"", str[i])) 1199 delim = str[i]; 1200 if (str[i]) 1201 i++; 1202 } 1203 1204 if (idx + 2 >= size) { 1205 char **nresult; 1206 size <<= 1; 1207 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1208 if (nresult == NULL) { 1209 el_free(result); 1210 return NULL; 1211 } 1212 result = nresult; 1213 } 1214 len = (size_t)i - (size_t)start; 1215 temp = el_calloc(len + 1, sizeof(*temp)); 1216 if (temp == NULL) { 1217 for (i = 0; i < idx; i++) 1218 el_free(result[i]); 1219 el_free(result); 1220 return NULL; 1221 } 1222 (void)strlcpy(temp, &str[start], len + 1); 1223 result[idx++] = temp; 1224 result[idx] = NULL; 1225 if (str[i]) 1226 i++; 1227 } 1228 return result; 1229 } 1230 1231 1232 /* 1233 * limit size of history record to ``max'' events 1234 */ 1235 void 1236 stifle_history(int max) 1237 { 1238 HistEvent ev; 1239 HIST_ENTRY *he; 1240 1241 if (h == NULL || e == NULL) 1242 rl_initialize(); 1243 1244 if (history(h, &ev, H_SETSIZE, max) == 0) { 1245 max_input_history = max; 1246 if (history_length > max) 1247 history_base = history_length - max; 1248 while (history_length > max) { 1249 he = remove_history(0); 1250 el_free(he->data); 1251 el_free((void *)(unsigned long)he->line); 1252 el_free(he); 1253 } 1254 } 1255 } 1256 1257 1258 /* 1259 * "unlimit" size of history - set the limit to maximum allowed int value 1260 */ 1261 int 1262 unstifle_history(void) 1263 { 1264 HistEvent ev; 1265 int omax; 1266 1267 history(h, &ev, H_SETSIZE, INT_MAX); 1268 omax = max_input_history; 1269 max_input_history = INT_MAX; 1270 return omax; /* some value _must_ be returned */ 1271 } 1272 1273 1274 int 1275 history_is_stifled(void) 1276 { 1277 1278 /* cannot return true answer */ 1279 return max_input_history != INT_MAX; 1280 } 1281 1282 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1283 1284 int 1285 history_truncate_file (const char *filename, int nlines) 1286 { 1287 int ret = 0; 1288 FILE *fp, *tp; 1289 char template[sizeof(_history_tmp_template)]; 1290 char buf[4096]; 1291 int fd; 1292 char *cp; 1293 off_t off; 1294 int count = 0; 1295 ssize_t left = 0; 1296 1297 if (filename == NULL && (filename = _default_history_file()) == NULL) 1298 return errno; 1299 if ((fp = fopen(filename, "r+")) == NULL) 1300 return errno; 1301 strcpy(template, _history_tmp_template); 1302 if ((fd = mkstemp(template)) == -1) { 1303 ret = errno; 1304 goto out1; 1305 } 1306 1307 if ((tp = fdopen(fd, "r+")) == NULL) { 1308 close(fd); 1309 ret = errno; 1310 goto out2; 1311 } 1312 1313 for(;;) { 1314 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1315 if (ferror(fp)) { 1316 ret = errno; 1317 break; 1318 } 1319 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1320 (off_t)-1) { 1321 ret = errno; 1322 break; 1323 } 1324 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1325 if (ferror(fp)) { 1326 ret = errno; 1327 break; 1328 } 1329 if (left == 0) { 1330 count--; 1331 left = sizeof(buf); 1332 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1333 != 1) { 1334 ret = errno; 1335 break; 1336 } 1337 fflush(tp); 1338 break; 1339 } 1340 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1341 ret = errno; 1342 break; 1343 } 1344 count++; 1345 } 1346 if (ret) 1347 goto out3; 1348 cp = buf + left - 1; 1349 if(*cp != '\n') 1350 cp++; 1351 for(;;) { 1352 while (--cp >= buf) { 1353 if (*cp == '\n') { 1354 if (--nlines == 0) { 1355 if (++cp >= buf + sizeof(buf)) { 1356 count++; 1357 cp = buf; 1358 } 1359 break; 1360 } 1361 } 1362 } 1363 if (nlines <= 0 || count == 0) 1364 break; 1365 count--; 1366 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1367 ret = errno; 1368 break; 1369 } 1370 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1371 if (ferror(tp)) { 1372 ret = errno; 1373 break; 1374 } 1375 ret = EAGAIN; 1376 break; 1377 } 1378 cp = buf + sizeof(buf); 1379 } 1380 1381 if (ret || nlines > 0) 1382 goto out3; 1383 1384 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1385 ret = errno; 1386 goto out3; 1387 } 1388 1389 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1390 (off_t)-1) { 1391 ret = errno; 1392 goto out3; 1393 } 1394 1395 for(;;) { 1396 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1397 if (ferror(fp)) 1398 ret = errno; 1399 break; 1400 } 1401 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1402 ret = errno; 1403 break; 1404 } 1405 } 1406 fflush(fp); 1407 if((off = ftello(fp)) > 0) 1408 (void)ftruncate(fileno(fp), off); 1409 out3: 1410 fclose(tp); 1411 out2: 1412 unlink(template); 1413 out1: 1414 fclose(fp); 1415 1416 return ret; 1417 } 1418 1419 1420 /* 1421 * read history from a file given 1422 */ 1423 int 1424 read_history(const char *filename) 1425 { 1426 HistEvent ev; 1427 1428 if (h == NULL || e == NULL) 1429 rl_initialize(); 1430 if (filename == NULL && (filename = _default_history_file()) == NULL) 1431 return errno; 1432 errno = 0; 1433 if (history(h, &ev, H_LOAD, filename) == -1) 1434 return errno ? errno : EINVAL; 1435 if (history(h, &ev, H_GETSIZE) == 0) 1436 history_length = ev.num; 1437 if (history_length < 0) 1438 return EINVAL; 1439 return 0; 1440 } 1441 1442 1443 /* 1444 * write history to a file given 1445 */ 1446 int 1447 write_history(const char *filename) 1448 { 1449 HistEvent ev; 1450 1451 if (h == NULL || e == NULL) 1452 rl_initialize(); 1453 if (filename == NULL && (filename = _default_history_file()) == NULL) 1454 return errno; 1455 return history(h, &ev, H_SAVE, filename) == -1 ? 1456 (errno ? errno : EINVAL) : 0; 1457 } 1458 1459 int 1460 append_history(int n, const char *filename) 1461 { 1462 HistEvent ev; 1463 FILE *fp; 1464 1465 if (h == NULL || e == NULL) 1466 rl_initialize(); 1467 if (filename == NULL && (filename = _default_history_file()) == NULL) 1468 return errno; 1469 1470 if ((fp = fopen(filename, "a")) == NULL) 1471 return errno; 1472 1473 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1474 int serrno = errno ? errno : EINVAL; 1475 fclose(fp); 1476 return serrno; 1477 } 1478 fclose(fp); 1479 return 0; 1480 } 1481 1482 /* 1483 * returns history ``num''th event 1484 * 1485 * returned pointer points to static variable 1486 */ 1487 HIST_ENTRY * 1488 history_get(int num) 1489 { 1490 static HIST_ENTRY she; 1491 HistEvent ev; 1492 int curr_num; 1493 1494 if (h == NULL || e == NULL) 1495 rl_initialize(); 1496 1497 if (num < history_base) 1498 return NULL; 1499 1500 /* save current position */ 1501 if (history(h, &ev, H_CURR) != 0) 1502 return NULL; 1503 curr_num = ev.num; 1504 1505 /* 1506 * use H_DELDATA to set to nth history (without delete) by passing 1507 * (void **)-1 -- as in history_set_pos 1508 */ 1509 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1510 goto out; 1511 1512 /* get current entry */ 1513 if (history(h, &ev, H_CURR) != 0) 1514 goto out; 1515 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1516 goto out; 1517 she.line = ev.str; 1518 1519 /* restore pointer to where it was */ 1520 (void)history(h, &ev, H_SET, curr_num); 1521 1522 return &she; 1523 1524 out: 1525 /* restore pointer to where it was */ 1526 (void)history(h, &ev, H_SET, curr_num); 1527 return NULL; 1528 } 1529 1530 1531 /* 1532 * add the line to history table 1533 */ 1534 int 1535 add_history(const char *line) 1536 { 1537 HistEvent ev; 1538 1539 if (h == NULL || e == NULL) 1540 rl_initialize(); 1541 1542 if (history(h, &ev, H_ENTER, line) == -1) 1543 return 0; 1544 1545 (void)history(h, &ev, H_GETSIZE); 1546 if (ev.num == history_length) 1547 history_base++; 1548 else { 1549 history_offset++; 1550 history_length = ev.num; 1551 } 1552 return 0; 1553 } 1554 1555 1556 /* 1557 * remove the specified entry from the history list and return it. 1558 */ 1559 HIST_ENTRY * 1560 remove_history(int num) 1561 { 1562 HIST_ENTRY *he; 1563 HistEvent ev; 1564 1565 if (h == NULL || e == NULL) 1566 rl_initialize(); 1567 1568 if ((he = el_malloc(sizeof(*he))) == NULL) 1569 return NULL; 1570 1571 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1572 el_free(he); 1573 return NULL; 1574 } 1575 1576 he->line = ev.str; 1577 if (history(h, &ev, H_GETSIZE) == 0) 1578 history_length = ev.num; 1579 1580 return he; 1581 } 1582 1583 1584 /* 1585 * replace the line and data of the num-th entry 1586 */ 1587 HIST_ENTRY * 1588 replace_history_entry(int num, const char *line, histdata_t data) 1589 { 1590 HIST_ENTRY *he; 1591 HistEvent ev; 1592 int curr_num; 1593 1594 if (h == NULL || e == NULL) 1595 rl_initialize(); 1596 1597 /* save current position */ 1598 if (history(h, &ev, H_CURR) != 0) 1599 return NULL; 1600 curr_num = ev.num; 1601 1602 /* start from the oldest */ 1603 if (history(h, &ev, H_LAST) != 0) 1604 return NULL; /* error */ 1605 1606 if ((he = el_malloc(sizeof(*he))) == NULL) 1607 return NULL; 1608 1609 /* look forwards for event matching specified offset */ 1610 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1611 goto out; 1612 1613 he->line = strdup(ev.str); 1614 if (he->line == NULL) 1615 goto out; 1616 1617 if (history(h, &ev, H_REPLACE, line, data)) 1618 goto out; 1619 1620 /* restore pointer to where it was */ 1621 if (history(h, &ev, H_SET, curr_num)) 1622 goto out; 1623 1624 return he; 1625 out: 1626 el_free(he); 1627 return NULL; 1628 } 1629 1630 /* 1631 * clear the history list - delete all entries 1632 */ 1633 void 1634 clear_history(void) 1635 { 1636 HistEvent ev; 1637 1638 if (h == NULL || e == NULL) 1639 rl_initialize(); 1640 1641 (void)history(h, &ev, H_CLEAR); 1642 history_offset = history_length = 0; 1643 } 1644 1645 1646 /* 1647 * returns offset of the current history event 1648 */ 1649 int 1650 where_history(void) 1651 { 1652 return history_offset; 1653 } 1654 1655 static HIST_ENTRY **_history_listp; 1656 static HIST_ENTRY *_history_list; 1657 1658 HIST_ENTRY ** 1659 history_list(void) 1660 { 1661 HistEvent ev; 1662 HIST_ENTRY **nlp, *nl; 1663 int i; 1664 1665 if (history(h, &ev, H_LAST) != 0) 1666 return NULL; 1667 1668 if ((nlp = el_realloc(_history_listp, 1669 ((size_t)history_length + 1) * sizeof(*nlp))) == NULL) 1670 return NULL; 1671 _history_listp = nlp; 1672 1673 if ((nl = el_realloc(_history_list, 1674 (size_t)history_length * sizeof(*nl))) == NULL) 1675 return NULL; 1676 _history_list = nl; 1677 1678 i = 0; 1679 do { 1680 _history_listp[i] = &_history_list[i]; 1681 _history_list[i].line = ev.str; 1682 _history_list[i].data = NULL; 1683 if (i++ == history_length) 1684 abort(); 1685 } while (history(h, &ev, H_PREV) == 0); 1686 _history_listp[i] = NULL; 1687 return _history_listp; 1688 } 1689 1690 /* 1691 * returns current history event or NULL if there is no such event 1692 */ 1693 HIST_ENTRY * 1694 current_history(void) 1695 { 1696 HistEvent ev; 1697 1698 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1699 return NULL; 1700 1701 rl_he.line = ev.str; 1702 rl_he.data = NULL; 1703 return &rl_he; 1704 } 1705 1706 1707 /* 1708 * returns total number of bytes history events' data are using 1709 */ 1710 int 1711 history_total_bytes(void) 1712 { 1713 HistEvent ev; 1714 int curr_num; 1715 size_t size; 1716 1717 if (history(h, &ev, H_CURR) != 0) 1718 return -1; 1719 curr_num = ev.num; 1720 1721 (void)history(h, &ev, H_FIRST); 1722 size = 0; 1723 do 1724 size += strlen(ev.str) * sizeof(*ev.str); 1725 while (history(h, &ev, H_NEXT) == 0); 1726 1727 /* get to the same position as before */ 1728 history(h, &ev, H_PREV_EVENT, curr_num); 1729 1730 return (int)size; 1731 } 1732 1733 1734 /* 1735 * sets the position in the history list to ``pos'' 1736 */ 1737 int 1738 history_set_pos(int pos) 1739 { 1740 if (pos >= history_length || pos < 0) 1741 return 0; 1742 1743 history_offset = pos; 1744 return 1; 1745 } 1746 1747 1748 /* 1749 * returns previous event in history and shifts pointer accordingly 1750 * Note that readline and editline define directions in opposite ways. 1751 */ 1752 HIST_ENTRY * 1753 previous_history(void) 1754 { 1755 HistEvent ev; 1756 1757 if (history_offset == 0) 1758 return NULL; 1759 1760 if (history(h, &ev, H_LAST) != 0) 1761 return NULL; 1762 1763 history_offset--; 1764 return current_history(); 1765 } 1766 1767 1768 /* 1769 * returns next event in history and shifts pointer accordingly 1770 */ 1771 HIST_ENTRY * 1772 next_history(void) 1773 { 1774 HistEvent ev; 1775 1776 if (history_offset >= history_length) 1777 return NULL; 1778 1779 if (history(h, &ev, H_LAST) != 0) 1780 return NULL; 1781 1782 history_offset++; 1783 return current_history(); 1784 } 1785 1786 1787 /* 1788 * searches for first history event containing the str 1789 */ 1790 int 1791 history_search(const char *str, int direction) 1792 { 1793 HistEvent ev; 1794 const char *strp; 1795 int curr_num; 1796 1797 if (history(h, &ev, H_CURR) != 0) 1798 return -1; 1799 curr_num = ev.num; 1800 1801 for (;;) { 1802 if ((strp = strstr(ev.str, str)) != NULL) 1803 return (int)(strp - ev.str); 1804 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1805 break; 1806 } 1807 (void)history(h, &ev, H_SET, curr_num); 1808 return -1; 1809 } 1810 1811 1812 /* 1813 * searches for first history event beginning with str 1814 */ 1815 int 1816 history_search_prefix(const char *str, int direction) 1817 { 1818 HistEvent ev; 1819 1820 return (history(h, &ev, direction < 0 ? 1821 H_PREV_STR : H_NEXT_STR, str)); 1822 } 1823 1824 1825 /* 1826 * search for event in history containing str, starting at offset 1827 * abs(pos); continue backward, if pos<0, forward otherwise 1828 */ 1829 /* ARGSUSED */ 1830 int 1831 history_search_pos(const char *str, 1832 int direction __attribute__((__unused__)), int pos) 1833 { 1834 HistEvent ev; 1835 int curr_num, off; 1836 1837 off = (pos > 0) ? pos : -pos; 1838 pos = (pos > 0) ? 1 : -1; 1839 1840 if (history(h, &ev, H_CURR) != 0) 1841 return -1; 1842 curr_num = ev.num; 1843 1844 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1845 return -1; 1846 1847 for (;;) { 1848 if (strstr(ev.str, str)) 1849 return off; 1850 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1851 break; 1852 } 1853 1854 /* set "current" pointer back to previous state */ 1855 (void)history(h, &ev, 1856 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1857 1858 return -1; 1859 } 1860 1861 1862 /********************************/ 1863 /* completion functions */ 1864 1865 char * 1866 tilde_expand(char *name) 1867 { 1868 return fn_tilde_expand(name); 1869 } 1870 1871 char * 1872 filename_completion_function(const char *name, int state) 1873 { 1874 return fn_filename_completion_function(name, state); 1875 } 1876 1877 /* 1878 * a completion generator for usernames; returns _first_ username 1879 * which starts with supplied text 1880 * text contains a partial username preceded by random character 1881 * (usually '~'); state resets search from start (??? should we do that anyway) 1882 * it's the caller's responsibility to free the returned value 1883 */ 1884 char * 1885 username_completion_function(const char *text, int state) 1886 { 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 (pass = getpwent()) != NULL 1900 && text[0] == pass->pw_name[0] 1901 && strcmp(text, pass->pw_name) == 0) 1902 continue; 1903 1904 if (pass == NULL) { 1905 endpwent(); 1906 return NULL; 1907 } 1908 return strdup(pass->pw_name); 1909 } 1910 1911 1912 /* 1913 * el-compatible wrapper to send TSTP on ^Z 1914 */ 1915 /* ARGSUSED */ 1916 static unsigned char 1917 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1918 { 1919 (void)kill(0, SIGTSTP); 1920 return CC_NORM; 1921 } 1922 1923 static const char * 1924 /*ARGSUSED*/ 1925 _rl_completion_append_character_function(const char *dummy 1926 __attribute__((__unused__))) 1927 { 1928 static char buf[2]; 1929 buf[0] = (char)rl_completion_append_character; 1930 buf[1] = '\0'; 1931 return buf; 1932 } 1933 1934 1935 /* 1936 * Display list of strings in columnar format on readline's output stream. 1937 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1938 * 'max' is maximum length of string in 'matches'. 1939 */ 1940 void 1941 rl_display_match_list(char **matches, int len, int max) 1942 { 1943 1944 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1945 _rl_completion_append_character_function); 1946 } 1947 1948 /* 1949 * complete word at current point 1950 */ 1951 /* ARGSUSED */ 1952 int 1953 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1954 { 1955 static ct_buffer_t wbreak_conv, sprefix_conv; 1956 const char *breakchars; 1957 1958 if (h == NULL || e == NULL) 1959 rl_initialize(); 1960 1961 if (rl_inhibit_completion) { 1962 char arr[2]; 1963 arr[0] = (char)invoking_key; 1964 arr[1] = '\0'; 1965 el_insertstr(e, arr); 1966 return CC_REFRESH; 1967 } 1968 1969 if (rl_completion_word_break_hook != NULL) 1970 breakchars = (*rl_completion_word_break_hook)(); 1971 else 1972 breakchars = rl_basic_word_break_characters; 1973 1974 _rl_update_pos(); 1975 1976 /* Just look at how many global variables modify this operation! */ 1977 return fn_complete(e, 1978 (rl_compentry_func_t *)rl_completion_entry_function, 1979 rl_attempted_completion_function, 1980 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1981 ct_decode_string(breakchars, &sprefix_conv), 1982 _rl_completion_append_character_function, 1983 (size_t)rl_completion_query_items, 1984 &rl_completion_type, &rl_attempted_completion_over, 1985 &rl_point, &rl_end); 1986 1987 1988 } 1989 1990 1991 /* ARGSUSED */ 1992 static unsigned char 1993 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1994 { 1995 return (unsigned char)rl_complete(0, ch); 1996 } 1997 1998 /* 1999 * misc other functions 2000 */ 2001 2002 /* 2003 * bind key c to readline-type function func 2004 */ 2005 int 2006 rl_bind_key(int c, rl_command_func_t *func) 2007 { 2008 int retval = -1; 2009 2010 if (h == NULL || e == NULL) 2011 rl_initialize(); 2012 2013 if (func == rl_insert) { 2014 /* XXX notice there is no range checking of ``c'' */ 2015 e->el_map.key[c] = ED_INSERT; 2016 retval = 0; 2017 } 2018 return retval; 2019 } 2020 2021 2022 /* 2023 * read one key from input - handles chars pushed back 2024 * to input stream also 2025 */ 2026 int 2027 rl_read_key(void) 2028 { 2029 char fooarr[2 * sizeof(int)]; 2030 2031 if (e == NULL || h == NULL) 2032 rl_initialize(); 2033 2034 return el_getc(e, fooarr); 2035 } 2036 2037 2038 /* 2039 * reset the terminal 2040 */ 2041 /* ARGSUSED */ 2042 int 2043 rl_reset_terminal(const char *p __attribute__((__unused__))) 2044 { 2045 2046 if (h == NULL || e == NULL) 2047 rl_initialize(); 2048 el_reset(e); 2049 return 0; 2050 } 2051 2052 2053 /* 2054 * insert character ``c'' back into input stream, ``count'' times 2055 */ 2056 int 2057 rl_insert(int count, int c) 2058 { 2059 char arr[2]; 2060 2061 if (h == NULL || e == NULL) 2062 rl_initialize(); 2063 2064 /* XXX - int -> char conversion can lose on multichars */ 2065 arr[0] = (char)c; 2066 arr[1] = '\0'; 2067 2068 for (; count > 0; count--) 2069 el_push(e, arr); 2070 2071 return 0; 2072 } 2073 2074 int 2075 rl_insert_text(const char *text) 2076 { 2077 if (!text || *text == 0) 2078 return 0; 2079 2080 if (h == NULL || e == NULL) 2081 rl_initialize(); 2082 2083 if (el_insertstr(e, text) < 0) 2084 return 0; 2085 return (int)strlen(text); 2086 } 2087 2088 /*ARGSUSED*/ 2089 int 2090 rl_newline(int count __attribute__((__unused__)), 2091 int c __attribute__((__unused__))) 2092 { 2093 /* 2094 * Readline-4.0 appears to ignore the args. 2095 */ 2096 return rl_insert(1, '\n'); 2097 } 2098 2099 /*ARGSUSED*/ 2100 static unsigned char 2101 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2102 { 2103 if (map[c] == NULL) 2104 return CC_ERROR; 2105 2106 _rl_update_pos(); 2107 2108 (*map[c])(1, c); 2109 2110 /* If rl_done was set by the above call, deal with it here */ 2111 if (rl_done) 2112 return CC_EOF; 2113 2114 return CC_NORM; 2115 } 2116 2117 int 2118 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2119 { 2120 char dest[8]; 2121 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2122 return -1; 2123 map[(unsigned char)c] = fun; 2124 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2125 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2126 el_set(e, EL_BIND, dest, name, NULL); 2127 return 0; 2128 } 2129 2130 void 2131 rl_callback_read_char(void) 2132 { 2133 int count = 0, done = 0; 2134 const char *buf = el_gets(e, &count); 2135 char *wbuf; 2136 2137 el_set(e, EL_UNBUFFERED, 1); 2138 if (buf == NULL || count-- <= 0) 2139 return; 2140 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2141 done = 1; 2142 if (buf[count] == '\n' || buf[count] == '\r') 2143 done = 2; 2144 2145 if (done && rl_linefunc != NULL) { 2146 el_set(e, EL_UNBUFFERED, 0); 2147 if (done == 2) { 2148 if ((wbuf = strdup(buf)) != NULL) 2149 wbuf[count] = '\0'; 2150 RL_SETSTATE(RL_STATE_DONE); 2151 } else 2152 wbuf = NULL; 2153 (*(void (*)(const char *))rl_linefunc)(wbuf); 2154 } 2155 _rl_update_pos(); 2156 } 2157 2158 void 2159 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2160 { 2161 if (e == NULL) { 2162 rl_initialize(); 2163 } 2164 (void)rl_set_prompt(prompt); 2165 rl_linefunc = linefunc; 2166 el_set(e, EL_UNBUFFERED, 1); 2167 } 2168 2169 void 2170 rl_callback_handler_remove(void) 2171 { 2172 el_set(e, EL_UNBUFFERED, 0); 2173 rl_linefunc = NULL; 2174 } 2175 2176 void 2177 rl_redisplay(void) 2178 { 2179 char a[2]; 2180 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2181 a[1] = '\0'; 2182 el_push(e, a); 2183 rl_forced_update_display(); 2184 } 2185 2186 int 2187 rl_get_previous_history(int count, int key) 2188 { 2189 char a[2]; 2190 a[0] = (char)key; 2191 a[1] = '\0'; 2192 while (count--) 2193 el_push(e, a); 2194 return 0; 2195 } 2196 2197 void 2198 /*ARGSUSED*/ 2199 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2200 { 2201 el_set(e, EL_PREP_TERM, 1); 2202 } 2203 2204 void 2205 rl_deprep_terminal(void) 2206 { 2207 el_set(e, EL_PREP_TERM, 0); 2208 } 2209 2210 int 2211 rl_read_init_file(const char *s) 2212 { 2213 return el_source(e, s); 2214 } 2215 2216 int 2217 rl_parse_and_bind(const char *line) 2218 { 2219 const char **argv; 2220 int argc; 2221 Tokenizer *tok; 2222 2223 tok = tok_init(NULL); 2224 tok_str(tok, line, &argc, &argv); 2225 argc = el_parse(e, argc, argv); 2226 tok_end(tok); 2227 return argc ? 1 : 0; 2228 } 2229 2230 int 2231 rl_variable_bind(const char *var, const char *value) 2232 { 2233 /* 2234 * The proper return value is undocument, but this is what the 2235 * readline source seems to do. 2236 */ 2237 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2238 } 2239 2240 int 2241 rl_stuff_char(int c) 2242 { 2243 char buf[2]; 2244 2245 buf[0] = (char)c; 2246 buf[1] = '\0'; 2247 el_insertstr(e, buf); 2248 return 1; 2249 } 2250 2251 static int 2252 _rl_event_read_char(EditLine *el, wchar_t *wc) 2253 { 2254 char ch; 2255 int n; 2256 ssize_t num_read = 0; 2257 2258 ch = '\0'; 2259 *wc = L'\0'; 2260 while (rl_event_hook) { 2261 2262 (*rl_event_hook)(); 2263 2264 #if defined(FIONREAD) 2265 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2266 return -1; 2267 if (n) 2268 num_read = read(el->el_infd, &ch, (size_t)1); 2269 else 2270 num_read = 0; 2271 #elif defined(F_SETFL) && defined(O_NDELAY) 2272 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2273 return -1; 2274 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2275 return -1; 2276 num_read = read(el->el_infd, &ch, 1); 2277 if (fcntl(el->el_infd, F_SETFL, n)) 2278 return -1; 2279 #else 2280 /* not non-blocking, but what you gonna do? */ 2281 num_read = read(el->el_infd, &ch, 1); 2282 return -1; 2283 #endif 2284 2285 if (num_read < 0 && errno == EAGAIN) 2286 continue; 2287 if (num_read == 0) 2288 continue; 2289 break; 2290 } 2291 if (!rl_event_hook) 2292 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2293 *wc = (wchar_t)ch; 2294 return (int)num_read; 2295 } 2296 2297 static void 2298 _rl_update_pos(void) 2299 { 2300 const LineInfo *li = el_line(e); 2301 2302 rl_point = (int)(li->cursor - li->buffer); 2303 rl_end = (int)(li->lastchar - li->buffer); 2304 rl_line_buffer[rl_end] = '\0'; 2305 } 2306 2307 char * 2308 rl_copy_text(int from, int to) 2309 { 2310 const LineInfo *li; 2311 size_t len; 2312 char * out; 2313 2314 if (h == NULL || e == NULL) 2315 rl_initialize(); 2316 2317 li = el_line(e); 2318 2319 if (from > to) 2320 return NULL; 2321 2322 if (li->buffer + from > li->lastchar) 2323 from = (int)(li->lastchar - li->buffer); 2324 2325 if (li->buffer + to > li->lastchar) 2326 to = (int)(li->lastchar - li->buffer); 2327 2328 len = (size_t)(to - from); 2329 out = el_malloc((size_t)len + 1); 2330 (void)strlcpy(out, li->buffer + from , len); 2331 2332 return out; 2333 } 2334 2335 void 2336 rl_replace_line(const char * text, int clear_undo __attribute__((__unused__))) 2337 { 2338 if (!text || *text == 0) 2339 return; 2340 2341 if (h == NULL || e == NULL) 2342 rl_initialize(); 2343 2344 el_replacestr(e, text); 2345 } 2346 2347 int 2348 rl_delete_text(int start, int end) 2349 { 2350 2351 if (h == NULL || e == NULL) 2352 rl_initialize(); 2353 2354 return el_deletestr1(e, start, end); 2355 } 2356 2357 void 2358 rl_get_screen_size(int *rows, int *cols) 2359 { 2360 if (rows) 2361 el_get(e, EL_GETTC, "li", rows); 2362 if (cols) 2363 el_get(e, EL_GETTC, "co", cols); 2364 } 2365 2366 #define MAX_MESSAGE 160 2367 void 2368 rl_message(const char *format, ...) 2369 { 2370 char msg[MAX_MESSAGE]; 2371 va_list args; 2372 2373 va_start(args, format); 2374 vsnprintf(msg, sizeof(msg), format, args); 2375 va_end(args); 2376 2377 rl_set_prompt(msg); 2378 rl_forced_update_display(); 2379 } 2380 2381 void 2382 rl_set_screen_size(int rows, int cols) 2383 { 2384 char buf[64]; 2385 (void)snprintf(buf, sizeof(buf), "%d", rows); 2386 el_set(e, EL_SETTC, "li", buf, NULL); 2387 (void)snprintf(buf, sizeof(buf), "%d", cols); 2388 el_set(e, EL_SETTC, "co", buf, NULL); 2389 } 2390 2391 char ** 2392 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2393 { 2394 size_t len, max, i, j, min; 2395 char **list, *match, *a, *b; 2396 2397 len = 1; 2398 max = 10; 2399 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2400 return NULL; 2401 2402 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2403 list[len++] = match; 2404 if (len == max) { 2405 char **nl; 2406 max += 10; 2407 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2408 goto out; 2409 list = nl; 2410 } 2411 } 2412 if (len == 1) 2413 goto out; 2414 list[len] = NULL; 2415 if (len == 2) { 2416 if ((list[0] = strdup(list[1])) == NULL) 2417 goto out; 2418 return list; 2419 } 2420 qsort(&list[1], len - 1, sizeof(*list), 2421 (int (*)(const void *, const void *)) strcmp); 2422 min = SIZE_MAX; 2423 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2424 b = list[i + 1]; 2425 for (j = 0; a[j] && a[j] == b[j]; j++) 2426 continue; 2427 if (min > j) 2428 min = j; 2429 } 2430 if (min == 0 && *str) { 2431 if ((list[0] = strdup(str)) == NULL) 2432 goto out; 2433 } else { 2434 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2435 goto out; 2436 (void)memcpy(list[0], list[1], min); 2437 list[0][min] = '\0'; 2438 } 2439 return list; 2440 2441 out: 2442 el_free(list); 2443 return NULL; 2444 } 2445 2446 char * 2447 rl_filename_completion_function (const char *text, int state) 2448 { 2449 return fn_filename_completion_function(text, state); 2450 } 2451 2452 void 2453 rl_forced_update_display(void) 2454 { 2455 el_set(e, EL_REFRESH); 2456 } 2457 2458 int 2459 _rl_abort_internal(void) 2460 { 2461 el_beep(e); 2462 longjmp(topbuf, 1); 2463 /*NOTREACHED*/ 2464 } 2465 2466 int 2467 _rl_qsort_string_compare(char **s1, char **s2) 2468 { 2469 return strcoll(*s1, *s2); 2470 } 2471 2472 HISTORY_STATE * 2473 history_get_history_state(void) 2474 { 2475 HISTORY_STATE *hs; 2476 2477 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2478 return NULL; 2479 hs->length = history_length; 2480 return hs; 2481 } 2482 2483 int 2484 /*ARGSUSED*/ 2485 rl_kill_text(int from __attribute__((__unused__)), 2486 int to __attribute__((__unused__))) 2487 { 2488 return 0; 2489 } 2490 2491 Keymap 2492 rl_make_bare_keymap(void) 2493 { 2494 return NULL; 2495 } 2496 2497 Keymap 2498 rl_get_keymap(void) 2499 { 2500 return NULL; 2501 } 2502 2503 void 2504 /*ARGSUSED*/ 2505 rl_set_keymap(Keymap k __attribute__((__unused__))) 2506 { 2507 } 2508 2509 int 2510 /*ARGSUSED*/ 2511 rl_generic_bind(int type __attribute__((__unused__)), 2512 const char * keyseq __attribute__((__unused__)), 2513 const char * data __attribute__((__unused__)), 2514 Keymap k __attribute__((__unused__))) 2515 { 2516 return 0; 2517 } 2518 2519 int 2520 /*ARGSUSED*/ 2521 rl_bind_key_in_map(int key __attribute__((__unused__)), 2522 rl_command_func_t *fun __attribute__((__unused__)), 2523 Keymap k __attribute__((__unused__))) 2524 { 2525 return 0; 2526 } 2527 2528 int 2529 rl_set_key(const char *keyseq __attribute__((__unused__)), 2530 rl_command_func_t *function __attribute__((__unused__)), 2531 Keymap k __attribute__((__unused__))) 2532 { 2533 return 0; 2534 } 2535 2536 /* unsupported, but needed by python */ 2537 void 2538 rl_cleanup_after_signal(void) 2539 { 2540 } 2541 2542 int 2543 rl_on_new_line(void) 2544 { 2545 return 0; 2546 } 2547 2548 void 2549 rl_free_line_state(void) 2550 { 2551 } 2552 2553 int 2554 /*ARGSUSED*/ 2555 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2556 { 2557 return 0; 2558 } 2559 2560 void 2561 rl_resize_terminal(void) 2562 { 2563 el_resize(e); 2564 } 2565 2566 void 2567 rl_reset_after_signal(void) 2568 { 2569 if (rl_prep_term_function) 2570 (*rl_prep_term_function)(); 2571 } 2572 2573 void 2574 rl_echo_signal_char(int sig) 2575 { 2576 int c = tty_get_signal_character(e, sig); 2577 if (c == -1) 2578 return; 2579 re_putc(e, c, 0); 2580 } 2581 2582 int 2583 rl_crlf(void) 2584 { 2585 re_putc(e, '\n', 0); 2586 return 0; 2587 } 2588 2589 int 2590 rl_ding(void) 2591 { 2592 re_putc(e, '\a', 0); 2593 return 0; 2594 } 2595 2596 int 2597 rl_abort(int count, int key) 2598 { 2599 return count && key ? 0 : 0; 2600 } 2601 2602 int 2603 rl_set_keymap_name(const char *name, Keymap k) 2604 { 2605 return name && k ? 0 : 0; 2606 } 2607 2608 histdata_t 2609 free_history_entry(HIST_ENTRY *he) 2610 { 2611 return he ? NULL : NULL; 2612 } 2613 2614 void 2615 _rl_erase_entire_line(void) 2616 { 2617 } 2618