1 /* $NetBSD: readline.c,v 1.182 2024/03/26 18:02:04 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 1.182 2024/03/26 18:02:04 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdarg.h> 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <vis.h> 53 54 #define completion_matches xxx_completion_matches 55 #include "readline/readline.h" 56 #undef completion_matches 57 #include "el.h" 58 #include "fcns.h" 59 #include "filecomplete.h" 60 61 void rl_prep_terminal(int); 62 void rl_deprep_terminal(void); 63 64 /* for rl_complete() */ 65 #define TAB '\r' 66 67 /* see comment at the #ifdef for sense of this */ 68 /* #define GDB_411_HACK */ 69 70 /* readline compatibility stuff - look at readline sources/documentation */ 71 /* to see what these variables mean */ 72 const char *rl_library_version = "EditLine wrapper"; 73 int rl_readline_version = RL_READLINE_VERSION; 74 static char empty[] = { '\0' }; 75 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 76 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 77 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 78 const char *rl_readline_name = empty; 79 FILE *rl_instream = NULL; 80 FILE *rl_outstream = NULL; 81 int rl_point = 0; 82 int rl_end = 0; 83 char *rl_line_buffer = NULL; 84 rl_vcpfunc_t *rl_linefunc = NULL; 85 int rl_done = 0; 86 rl_hook_func_t *rl_event_hook = NULL; 87 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 88 emacs_meta_keymap, 89 emacs_ctlx_keymap; 90 /* 91 * The following is not implemented; we always catch signals in the 92 * libedit fashion: set handlers on entry to el_gets() and clear them 93 * on the way out. This simplistic approach works for most cases; if 94 * it does not work for your application, please let us know. 95 */ 96 int rl_catch_signals = 1; 97 int rl_catch_sigwinch = 1; 98 99 int history_base = 1; /* probably never subject to change */ 100 int history_length = 0; 101 int history_offset = 0; 102 int max_input_history = 0; 103 char history_expansion_char = '!'; 104 char history_subst_char = '^'; 105 char *history_no_expand_chars = expand_chars; 106 rl_linebuf_func_t *history_inhibit_expansion_function = NULL; 107 char *history_arg_extract(int start, int end, const char *str); 108 109 int rl_inhibit_completion = 0; 110 int rl_attempted_completion_over = 0; 111 const char *rl_basic_word_break_characters = break_chars; 112 char *rl_completer_word_break_characters = NULL; 113 const char *rl_completer_quote_characters = NULL; 114 const char *rl_basic_quote_characters = "\"'"; 115 rl_compentry_func_t *rl_completion_entry_function = NULL; 116 char *(*rl_completion_word_break_hook)(void) = NULL; 117 rl_completion_func_t *rl_attempted_completion_function = NULL; 118 rl_hook_func_t *rl_pre_input_hook = NULL; 119 rl_hook_func_t *rl_startup1_hook = NULL; 120 int (*rl_getc_function)(FILE *) = NULL; 121 char *rl_terminal_name = NULL; 122 int rl_already_prompted = 0; 123 int rl_filename_completion_desired = 0; 124 int rl_ignore_completion_duplicates = 0; 125 int readline_echoing_p = 1; 126 int _rl_print_completions_horizontally = 0; 127 rl_voidfunc_t *rl_redisplay_function = NULL; 128 rl_hook_func_t *rl_startup_hook = NULL; 129 rl_compdisp_func_t *rl_completion_display_matches_hook = NULL; 130 rl_vintfunc_t *rl_prep_term_function = (rl_vintfunc_t *)rl_prep_terminal; 131 rl_voidfunc_t *rl_deprep_term_function = (rl_voidfunc_t *)rl_deprep_terminal; 132 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 133 unsigned long rl_readline_state = RL_STATE_NONE; 134 int _rl_complete_mark_directories; 135 rl_icppfunc_t *rl_directory_completion_hook; 136 int rl_completion_suppress_append; 137 int rl_sort_completion_matches; 138 int _rl_completion_prefix_display_length; 139 int _rl_echoing_p; 140 int history_max_entries; 141 char *rl_display_prompt; 142 int rl_erase_empty_line; 143 144 /* 145 * The current prompt string. 146 */ 147 char *rl_prompt = NULL; 148 char *rl_prompt_saved = NULL; 149 /* 150 * This is set to character indicating type of completion being done by 151 * rl_complete_internal(); this is available for application completion 152 * functions. 153 */ 154 int rl_completion_type = 0; 155 156 /* 157 * If more than this number of items results from query for possible 158 * completions, we ask user if they are sure to really display the list. 159 */ 160 int rl_completion_query_items = 100; 161 162 /* 163 * List of characters which are word break characters, but should be left 164 * in the parsed text when it is passed to the completion function. 165 * Shell uses this to help determine what kind of completing to do. 166 */ 167 const char *rl_special_prefixes = NULL; 168 169 /* 170 * This is the character appended to the completed words if at the end of 171 * the line. Default is ' ' (a space). 172 */ 173 int rl_completion_append_character = ' '; 174 175 /* stuff below is used internally by libedit for readline emulation */ 176 177 static History *h = NULL; 178 static EditLine *e = NULL; 179 static rl_command_func_t *map[256]; 180 static jmp_buf topbuf; 181 182 /* internal functions */ 183 static unsigned char _el_rl_complete(EditLine *, int); 184 static unsigned char _el_rl_tstp(EditLine *, int); 185 static char *_get_prompt(EditLine *); 186 static int _getc_function(EditLine *, wchar_t *); 187 static int _history_expand_command(const char *, size_t, size_t, 188 char **); 189 static char *_rl_compat_sub(const char *, const char *, 190 const char *, int); 191 static int _rl_event_read_char(EditLine *, wchar_t *); 192 static void _rl_update_pos(void); 193 194 static HIST_ENTRY rl_he; 195 196 /* ARGSUSED */ 197 static char * 198 _get_prompt(EditLine *el __attribute__((__unused__))) 199 { 200 rl_already_prompted = 1; 201 return rl_prompt; 202 } 203 204 205 /* 206 * read one key from user defined input function 207 */ 208 static int 209 /*ARGSUSED*/ 210 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 211 { 212 int i; 213 214 i = (*rl_getc_function)(rl_instream); 215 if (i == -1) 216 return 0; 217 *c = (wchar_t)i; 218 return 1; 219 } 220 221 static void 222 _resize_fun(EditLine *el, void *a) 223 { 224 const LineInfo *li; 225 const char **ap = a; 226 227 li = el_line(el); 228 *ap = li->buffer; 229 } 230 231 static const char * 232 _default_history_file(void) 233 { 234 struct passwd *p; 235 static char *path; 236 size_t len; 237 238 if (path) 239 return path; 240 241 if ((p = getpwuid(getuid())) == NULL) 242 return NULL; 243 244 len = strlen(p->pw_dir) + sizeof("/.history"); 245 if ((path = el_malloc(len)) == NULL) 246 return NULL; 247 248 (void)snprintf(path, len, "%s/.history", p->pw_dir); 249 return path; 250 } 251 252 /* 253 * READLINE compatibility stuff 254 */ 255 256 /* 257 * Set the prompt 258 */ 259 int 260 rl_set_prompt(const char *prompt) 261 { 262 char *p; 263 264 if (!prompt) 265 prompt = ""; 266 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 267 return 0; 268 if (rl_prompt) 269 el_free(rl_prompt); 270 rl_prompt = strdup(prompt); 271 if (rl_prompt == NULL) 272 return -1; 273 274 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) { 275 /* Remove adjacent end/start markers to avoid double-escapes. */ 276 if (p[1] == RL_PROMPT_START_IGNORE) { 277 memmove(p, p + 2, 1 + strlen(p + 2)); 278 } else { 279 *p = RL_PROMPT_START_IGNORE; 280 } 281 } 282 283 return 0; 284 } 285 286 void 287 rl_save_prompt(void) 288 { 289 rl_prompt_saved = strdup(rl_prompt); 290 } 291 292 void 293 rl_restore_prompt(void) 294 { 295 if (!rl_prompt_saved) 296 return; 297 rl_prompt = rl_prompt_saved; 298 rl_prompt_saved = NULL; 299 } 300 301 /* 302 * initialize rl compat stuff 303 */ 304 int 305 rl_initialize(void) 306 { 307 HistEvent ev; 308 int editmode = 1; 309 struct termios t; 310 311 if (e != NULL) 312 el_end(e); 313 if (h != NULL) 314 history_end(h); 315 316 RL_UNSETSTATE(RL_STATE_DONE); 317 318 if (!rl_instream) 319 rl_instream = stdin; 320 if (!rl_outstream) 321 rl_outstream = stdout; 322 323 /* 324 * See if we don't really want to run the editor 325 */ 326 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 327 editmode = 0; 328 329 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 330 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 331 NO_RESET); 332 333 if (!editmode) 334 el_set(e, EL_EDITMODE, 0); 335 336 h = history_init(); 337 if (!e || !h) 338 return -1; 339 340 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 341 history_length = 0; 342 max_input_history = INT_MAX; 343 el_set(e, EL_HIST, history, h); 344 345 /* Setup resize function */ 346 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 347 348 /* setup getc function if valid */ 349 if (rl_getc_function) 350 el_set(e, EL_GETCFN, _getc_function); 351 352 /* for proper prompt printing in readline() */ 353 if (rl_set_prompt("") == -1) { 354 history_end(h); 355 el_end(e); 356 return -1; 357 } 358 el_set(e, EL_PROMPT_ESC, _get_prompt, RL_PROMPT_START_IGNORE); 359 el_set(e, EL_SIGNAL, rl_catch_signals); 360 361 /* set default mode to "emacs"-style and read setting afterwards */ 362 /* so this can be overridden */ 363 el_set(e, EL_EDITOR, "emacs"); 364 if (rl_terminal_name != NULL) 365 el_set(e, EL_TERMINAL, rl_terminal_name); 366 else 367 el_get(e, EL_TERMINAL, &rl_terminal_name); 368 369 /* 370 * Word completion - this has to go AFTER rebinding keys 371 * to emacs-style. 372 */ 373 el_set(e, EL_ADDFN, "rl_complete", 374 "ReadLine compatible completion function", 375 _el_rl_complete); 376 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 377 378 /* 379 * Send TSTP when ^Z is pressed. 380 */ 381 el_set(e, EL_ADDFN, "rl_tstp", 382 "ReadLine compatible suspend function", 383 _el_rl_tstp); 384 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 385 386 /* 387 * Set some readline compatible key-bindings. 388 */ 389 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 390 391 /* 392 * Allow the use of Home/End keys. 393 */ 394 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 395 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 396 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 397 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 398 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 399 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 400 401 /* 402 * Allow the use of the Delete/Insert keys. 403 */ 404 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 405 el_set(e, EL_BIND, "\\e[2~", "em-toggle-overwrite", NULL); 406 407 /* 408 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 409 */ 410 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 411 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 412 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 413 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 414 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 415 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 416 417 /* read settings from configuration file */ 418 el_source(e, NULL); 419 420 /* 421 * Unfortunately, some applications really do use rl_point 422 * and rl_line_buffer directly. 423 */ 424 _resize_fun(e, &rl_line_buffer); 425 _rl_update_pos(); 426 427 tty_end(e, TCSADRAIN); 428 429 return 0; 430 } 431 432 433 /* 434 * read one line from input stream and return it, chomping 435 * trailing newline (if there is any) 436 */ 437 char * 438 readline(const char *p) 439 { 440 HistEvent ev; 441 const char * volatile prompt = p; 442 int count; 443 const char *ret; 444 char *buf; 445 static int used_event_hook; 446 447 if (e == NULL || h == NULL) 448 rl_initialize(); 449 if (rl_startup_hook) { 450 (*rl_startup_hook)(); 451 } 452 tty_init(e); 453 454 455 rl_done = 0; 456 457 (void)setjmp(topbuf); 458 buf = NULL; 459 460 /* update prompt accordingly to what has been passed */ 461 if (rl_set_prompt(prompt) == -1) 462 goto out; 463 464 if (rl_pre_input_hook) 465 (*rl_pre_input_hook)(); 466 467 if (rl_event_hook && !(e->el_flags & NO_TTY)) { 468 el_set(e, EL_GETCFN, _rl_event_read_char); 469 used_event_hook = 1; 470 } 471 472 if (!rl_event_hook && used_event_hook) { 473 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 474 used_event_hook = 0; 475 } 476 477 rl_already_prompted = 0; 478 479 /* get one line from input stream */ 480 ret = el_gets(e, &count); 481 482 if (ret && count > 0) { 483 int lastidx; 484 485 buf = strdup(ret); 486 if (buf == NULL) 487 goto out; 488 lastidx = count - 1; 489 if (buf[lastidx] == '\n') 490 buf[lastidx] = '\0'; 491 } else 492 buf = NULL; 493 494 history(h, &ev, H_GETSIZE); 495 history_length = ev.num; 496 497 out: 498 tty_end(e, TCSADRAIN); 499 return buf; 500 } 501 502 /* 503 * history functions 504 */ 505 506 /* 507 * is normally called before application starts to use 508 * history expansion functions 509 */ 510 void 511 using_history(void) 512 { 513 if (h == NULL || e == NULL) 514 rl_initialize(); 515 history_offset = history_length; 516 } 517 518 519 /* 520 * substitute ``what'' with ``with'', returning resulting string; if 521 * globally == 1, substitutes all occurrences of what, otherwise only the 522 * first one 523 */ 524 static char * 525 _rl_compat_sub(const char *str, const char *what, const char *with, 526 int globally) 527 { 528 const char *s; 529 char *r, *result; 530 size_t len, with_len, what_len; 531 532 len = strlen(str); 533 with_len = strlen(with); 534 what_len = strlen(what); 535 536 /* calculate length we need for result */ 537 s = str; 538 while (*s) { 539 if (*s == *what && !strncmp(s, what, what_len)) { 540 len += with_len - what_len; 541 if (!globally) 542 break; 543 s += what_len; 544 } else 545 s++; 546 } 547 r = result = el_calloc(len + 1, sizeof(*r)); 548 if (result == NULL) 549 return NULL; 550 s = str; 551 while (*s) { 552 if (*s == *what && !strncmp(s, what, what_len)) { 553 memcpy(r, with, with_len); 554 r += with_len; 555 s += what_len; 556 if (!globally) { 557 (void)strcpy(r, s); 558 return result; 559 } 560 } else 561 *r++ = *s++; 562 } 563 *r = '\0'; 564 return result; 565 } 566 567 static char *last_search_pat; /* last !?pat[?] search pattern */ 568 static char *last_search_match; /* last !?pat[?] that matched */ 569 570 const char * 571 get_history_event(const char *cmd, int *cindex, int qchar) 572 { 573 int idx, sign, sub, num, begin, ret; 574 size_t len; 575 char *pat; 576 const char *rptr; 577 HistEvent ev; 578 579 idx = *cindex; 580 if (cmd[idx++] != history_expansion_char) 581 return NULL; 582 583 /* find out which event to take */ 584 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 585 if (history(h, &ev, H_FIRST) != 0) 586 return NULL; 587 *cindex = cmd[idx]? (idx + 1):idx; 588 return ev.str; 589 } 590 sign = 0; 591 if (cmd[idx] == '-') { 592 sign = 1; 593 idx++; 594 } 595 596 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 597 HIST_ENTRY *he; 598 599 num = 0; 600 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 601 num = num * 10 + cmd[idx] - '0'; 602 idx++; 603 } 604 if (sign) 605 num = history_length - num + history_base; 606 607 if (!(he = history_get(num))) 608 return NULL; 609 610 *cindex = idx; 611 return he->line; 612 } 613 sub = 0; 614 if (cmd[idx] == '?') { 615 sub = 1; 616 idx++; 617 } 618 begin = idx; 619 while (cmd[idx]) { 620 if (cmd[idx] == '\n') 621 break; 622 if (sub && cmd[idx] == '?') 623 break; 624 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 625 || cmd[idx] == '\t' || cmd[idx] == qchar)) 626 break; 627 idx++; 628 } 629 len = (size_t)idx - (size_t)begin; 630 if (sub && cmd[idx] == '?') 631 idx++; 632 if (sub && len == 0 && last_search_pat && *last_search_pat) 633 pat = last_search_pat; 634 else if (len == 0) 635 return NULL; 636 else { 637 if ((pat = el_calloc(len + 1, sizeof(*pat))) == NULL) 638 return NULL; 639 (void)strlcpy(pat, cmd + begin, len + 1); 640 } 641 642 if (history(h, &ev, H_CURR) != 0) { 643 if (pat != last_search_pat) 644 el_free(pat); 645 return NULL; 646 } 647 num = ev.num; 648 649 if (sub) { 650 if (pat != last_search_pat) { 651 el_free(last_search_pat); 652 last_search_pat = pat; 653 } 654 ret = history_search(pat, -1); 655 } else 656 ret = history_search_prefix(pat, -1); 657 658 if (ret == -1) { 659 /* restore to end of list on failed search */ 660 history(h, &ev, H_FIRST); 661 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 662 if (pat != last_search_pat) 663 el_free(pat); 664 return NULL; 665 } 666 667 if (sub && len) { 668 el_free(last_search_match); 669 last_search_match = strdup(pat); 670 } 671 672 if (pat != last_search_pat) 673 el_free(pat); 674 675 if (history(h, &ev, H_CURR) != 0) 676 return NULL; 677 *cindex = idx; 678 rptr = ev.str; 679 680 /* roll back to original position */ 681 (void)history(h, &ev, H_SET, num); 682 683 return rptr; 684 } 685 686 static int 687 getfrom(const char **cmdp, char **fromp, const char *search, int delim) 688 { 689 size_t size = 16; 690 size_t len = 0; 691 const char *cmd = *cmdp; 692 char *what = el_realloc(*fromp, size * sizeof(*what)); 693 if (what == NULL){ 694 el_free(*fromp); 695 *fromp = NULL; 696 return 0; 697 } 698 for (; *cmd && *cmd != delim; cmd++) { 699 if (*cmd == '\\' && cmd[1] == delim) 700 cmd++; 701 if (len - 1 >= size) { 702 char *nwhat; 703 nwhat = el_realloc(what, (size <<= 1) * sizeof(*nwhat)); 704 if (nwhat == NULL) { 705 el_free(what); 706 el_free(*fromp); 707 *cmdp = cmd; 708 *fromp = NULL; 709 return 0; 710 } 711 what = nwhat; 712 } 713 what[len++] = *cmd; 714 } 715 what[len] = '\0'; 716 *fromp = what; 717 *cmdp = cmd; 718 if (*what == '\0') { 719 el_free(what); 720 if (search) { 721 *fromp = strdup(search); 722 if (*fromp == NULL) { 723 return 0; 724 } 725 } else { 726 *fromp = NULL; 727 return -1; 728 } 729 } 730 if (!*cmd) { 731 el_free(what); 732 *fromp = NULL; 733 return -1; 734 } 735 736 cmd++; /* shift after delim */ 737 *cmdp = cmd; 738 739 if (!*cmd) { 740 el_free(what); 741 *fromp = NULL; 742 return -1; 743 } 744 return 1; 745 } 746 747 static int 748 getto(const char **cmdp, char **top, const char *from, int delim) 749 { 750 size_t size = 16; 751 size_t len = 0; 752 size_t from_len = strlen(from); 753 const char *cmd = *cmdp; 754 char *with = el_realloc(*top, size * sizeof(*with)); 755 *top = NULL; 756 if (with == NULL) 757 goto out; 758 759 for (; *cmd && *cmd != delim; cmd++) { 760 if (len + from_len + 1 >= size) { 761 char *nwith; 762 size += from_len + 1; 763 nwith = el_realloc(with, size * sizeof(*nwith)); 764 if (nwith == NULL) 765 goto out; 766 with = nwith; 767 } 768 if (*cmd == '&') { 769 /* safe */ 770 strcpy(&with[len], from); 771 len += from_len; 772 continue; 773 } 774 if (*cmd == '\\' && (*(cmd + 1) == delim || *(cmd + 1) == '&')) 775 cmd++; 776 with[len++] = *cmd; 777 } 778 if (!*cmd) 779 goto out; 780 with[len] = '\0'; 781 *top = with; 782 *cmdp = cmd; 783 return 1; 784 out: 785 el_free(with); 786 el_free(*top); 787 *top = NULL; 788 *cmdp = cmd; 789 return -1; 790 } 791 792 static void 793 replace(char **tmp, int c) 794 { 795 char *aptr; 796 if ((aptr = strrchr(*tmp, c)) == NULL) 797 return; 798 aptr = strdup(aptr + 1); // XXX: check 799 el_free(*tmp); 800 *tmp = aptr; 801 } 802 803 /* 804 * the real function doing history expansion - takes as argument command 805 * to do and data upon which the command should be executed 806 * does expansion the way I've understood readline documentation 807 * 808 * returns 0 if data was not modified, 1 if it was and 2 if the string 809 * should be only printed and not executed; in case of error, 810 * returns -1 and *result points to NULL 811 * it's the caller's responsibility to free() the string returned in *result 812 */ 813 static int 814 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 815 char **result) 816 { 817 char *tmp, *search = NULL, *aptr, delim; 818 const char *ptr, *cmd; 819 static char *from = NULL, *to = NULL; 820 int start, end, idx, has_mods = 0; 821 int p_on = 0, g_on = 0, ev; 822 823 *result = NULL; 824 aptr = NULL; 825 ptr = NULL; 826 827 /* First get event specifier */ 828 idx = 0; 829 830 if (strchr(":^*$", command[offs + 1])) { 831 char str[4]; 832 /* 833 * "!:" is shorthand for "!!:". 834 * "!^", "!*" and "!$" are shorthand for 835 * "!!:^", "!!:*" and "!!:$" respectively. 836 */ 837 str[0] = str[1] = '!'; 838 str[2] = '0'; 839 ptr = get_history_event(str, &idx, 0); 840 idx = (command[offs + 1] == ':')? 1:0; 841 has_mods = 1; 842 } else { 843 if (command[offs + 1] == '#') { 844 /* use command so far */ 845 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 846 == NULL) 847 return -1; 848 (void)strlcpy(aptr, command, offs + 1); 849 idx = 1; 850 } else { 851 int qchar; 852 853 qchar = (offs > 0 && command[offs - 1] == '"') 854 ? '"' : '\0'; 855 ptr = get_history_event(command + offs, &idx, qchar); 856 } 857 has_mods = command[offs + (size_t)idx] == ':'; 858 } 859 860 if (ptr == NULL && aptr == NULL) 861 return -1; 862 863 if (!has_mods) { 864 *result = strdup(aptr ? aptr : ptr); 865 if (aptr) 866 el_free(aptr); 867 if (*result == NULL) 868 return -1; 869 return 1; 870 } 871 872 cmd = command + offs + idx + 1; 873 874 /* Now parse any word designators */ 875 876 if (*cmd == '%') /* last word matched by ?pat? */ 877 tmp = strdup(last_search_match ? last_search_match : ""); 878 else if (strchr("^*$-0123456789", *cmd)) { 879 start = end = -1; 880 if (*cmd == '^') 881 start = end = 1, cmd++; 882 else if (*cmd == '$') 883 start = -1, cmd++; 884 else if (*cmd == '*') 885 start = 1, cmd++; 886 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 887 start = 0; 888 while (*cmd && '0' <= *cmd && *cmd <= '9') 889 start = start * 10 + *cmd++ - '0'; 890 891 if (*cmd == '-') { 892 if (isdigit((unsigned char) cmd[1])) { 893 cmd++; 894 end = 0; 895 while (*cmd && '0' <= *cmd && *cmd <= '9') 896 end = end * 10 + *cmd++ - '0'; 897 } else if (cmd[1] == '$') { 898 cmd += 2; 899 end = -1; 900 } else { 901 cmd++; 902 end = -2; 903 } 904 } else if (*cmd == '*') 905 end = -1, cmd++; 906 else 907 end = start; 908 } 909 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 910 if (tmp == NULL) { 911 (void)fprintf(rl_outstream, "%s: Bad word specifier", 912 command + offs + idx); 913 if (aptr) 914 el_free(aptr); 915 return -1; 916 } 917 } else 918 tmp = strdup(aptr? aptr:ptr); 919 920 if (aptr) 921 el_free(aptr); 922 923 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 924 *result = tmp; 925 return 1; 926 } 927 928 for (; *cmd; cmd++) { 929 switch (*cmd) { 930 case ':': 931 continue; 932 case 'h': /* remove trailing path */ 933 if ((aptr = strrchr(tmp, '/')) != NULL) 934 *aptr = '\0'; 935 continue; 936 case 't': /* remove leading path */ 937 replace(&tmp, '/'); 938 continue; 939 case 'r': /* remove trailing suffix */ 940 if ((aptr = strrchr(tmp, '.')) != NULL) 941 *aptr = '\0'; 942 continue; 943 case 'e': /* remove all but suffix */ 944 replace(&tmp, '.'); 945 continue; 946 case 'p': /* print only */ 947 p_on = 1; 948 continue; 949 case 'g': 950 g_on = 2; 951 continue; 952 case '&': 953 if (from == NULL || to == NULL) 954 continue; 955 /*FALLTHROUGH*/ 956 case 's': 957 ev = -1; 958 delim = *++cmd; 959 if (delim == '\0' || *++cmd == '\0') 960 goto out; 961 if ((ev = getfrom(&cmd, &from, search, delim)) != 1) 962 goto out; 963 if ((ev = getto(&cmd, &to, from, delim)) != 1) 964 goto out; 965 aptr = _rl_compat_sub(tmp, from, to, g_on); 966 if (aptr) { 967 el_free(tmp); 968 tmp = aptr; 969 } 970 g_on = 0; 971 cmd--; 972 continue; 973 } 974 } 975 *result = tmp; 976 return p_on ? 2 : 1; 977 out: 978 el_free(tmp); 979 return ev; 980 981 } 982 983 984 /* 985 * csh-style history expansion 986 */ 987 int 988 history_expand(char *str, char **output) 989 { 990 int ret = 0; 991 size_t idx, i, size; 992 char *tmp, *result; 993 994 if (h == NULL || e == NULL) 995 rl_initialize(); 996 997 if (history_expansion_char == 0) { 998 *output = strdup(str); 999 return 0; 1000 } 1001 1002 *output = NULL; 1003 if (str[0] == history_subst_char) { 1004 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 1005 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 1006 if (*output == NULL) 1007 return 0; 1008 (*output)[0] = (*output)[1] = history_expansion_char; 1009 (*output)[2] = ':'; 1010 (*output)[3] = 's'; 1011 (void)strcpy((*output) + 4, str); 1012 str = *output; 1013 } else { 1014 *output = strdup(str); 1015 if (*output == NULL) 1016 return 0; 1017 } 1018 1019 #define ADD_STRING(what, len, fr) \ 1020 { \ 1021 if (idx + len + 1 > size) { \ 1022 char *nresult = el_realloc(result, \ 1023 (size += len + 1) * sizeof(*nresult)); \ 1024 if (nresult == NULL) { \ 1025 el_free(*output); \ 1026 el_free(fr); \ 1027 return 0; \ 1028 } \ 1029 result = nresult; \ 1030 } \ 1031 (void)strlcpy(&result[idx], what, len + 1); \ 1032 idx += len; \ 1033 } 1034 1035 result = NULL; 1036 size = idx = 0; 1037 tmp = NULL; 1038 for (i = 0; str[i];) { 1039 int qchar, loop_again; 1040 size_t len, start, j; 1041 1042 qchar = 0; 1043 loop_again = 1; 1044 start = j = i; 1045 loop: 1046 for (; str[j]; j++) { 1047 if (str[j] == '\\' && 1048 str[j + 1] == history_expansion_char) { 1049 len = strlen(&str[j + 1]) + 1; 1050 memmove(&str[j], &str[j + 1], len); 1051 continue; 1052 } 1053 if (!loop_again) { 1054 if (isspace((unsigned char) str[j]) 1055 || str[j] == qchar) 1056 break; 1057 } 1058 if (str[j] == history_expansion_char 1059 && !strchr(history_no_expand_chars, str[j + 1]) 1060 && (!history_inhibit_expansion_function || 1061 (*history_inhibit_expansion_function)(str, 1062 (int)j) == 0)) 1063 break; 1064 } 1065 1066 if (str[j] && loop_again) { 1067 i = j; 1068 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1069 j++; 1070 if (str[j] == history_expansion_char) 1071 j++; 1072 loop_again = 0; 1073 goto loop; 1074 } 1075 len = i - start; 1076 ADD_STRING(&str[start], len, NULL); 1077 1078 if (str[i] == '\0' || str[i] != history_expansion_char) { 1079 len = j - i; 1080 ADD_STRING(&str[i], len, NULL); 1081 if (start == 0) 1082 ret = 0; 1083 else 1084 ret = 1; 1085 break; 1086 } 1087 ret = _history_expand_command (str, i, (j - i), &tmp); 1088 if (ret > 0 && tmp) { 1089 len = strlen(tmp); 1090 ADD_STRING(tmp, len, tmp); 1091 } 1092 if (tmp) { 1093 el_free(tmp); 1094 tmp = NULL; 1095 } 1096 i = j; 1097 } 1098 1099 /* ret is 2 for "print only" option */ 1100 if (ret == 2) { 1101 add_history(result); 1102 #ifdef GDB_411_HACK 1103 /* gdb 4.11 has been shipped with readline, where */ 1104 /* history_expand() returned -1 when the line */ 1105 /* should not be executed; in readline 2.1+ */ 1106 /* it should return 2 in such a case */ 1107 ret = -1; 1108 #endif 1109 } 1110 el_free(*output); 1111 *output = result; 1112 1113 return ret; 1114 } 1115 1116 /* 1117 * Return a string consisting of arguments of "str" from "start" to "end". 1118 */ 1119 char * 1120 history_arg_extract(int start, int end, const char *str) 1121 { 1122 size_t i, len, max; 1123 char **arr, *result = NULL; 1124 1125 arr = history_tokenize(str); 1126 if (!arr) 1127 return NULL; 1128 if (arr && *arr == NULL) 1129 goto out; 1130 1131 for (max = 0; arr[max]; max++) 1132 continue; 1133 max--; 1134 1135 if (start == '$') 1136 start = (int)max; 1137 if (end == '$') 1138 end = (int)max; 1139 if (end < 0) 1140 end = (int)max + end + 1; 1141 if (start < 0) 1142 start = end; 1143 1144 if (start < 0 || end < 0 || (size_t)start > max || 1145 (size_t)end > max || start > end) 1146 goto out; 1147 1148 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1149 len += strlen(arr[i]) + 1; 1150 len++; 1151 result = el_calloc(len, sizeof(*result)); 1152 if (result == NULL) 1153 goto out; 1154 1155 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1156 (void)strcpy(result + len, arr[i]); 1157 len += strlen(arr[i]); 1158 if (i < (size_t)end) 1159 result[len++] = ' '; 1160 } 1161 result[len] = '\0'; 1162 1163 out: 1164 for (i = 0; arr[i]; i++) 1165 el_free(arr[i]); 1166 el_free(arr); 1167 1168 return result; 1169 } 1170 1171 /* 1172 * Parse the string into individual tokens, 1173 * similar to how shell would do it. 1174 */ 1175 char ** 1176 history_tokenize(const char *str) 1177 { 1178 int size = 1, idx = 0, i, start; 1179 size_t len; 1180 char **result = NULL, *temp, delim = '\0'; 1181 1182 for (i = 0; str[i];) { 1183 while (isspace((unsigned char) str[i])) 1184 i++; 1185 start = i; 1186 for (; str[i];) { 1187 if (str[i] == '\\') { 1188 if (str[i+1] != '\0') 1189 i++; 1190 } else if (str[i] == delim) 1191 delim = '\0'; 1192 else if (!delim && 1193 (isspace((unsigned char) str[i]) || 1194 strchr("()<>;&|$", str[i]))) 1195 break; 1196 else if (!delim && strchr("'`\"", str[i])) 1197 delim = str[i]; 1198 if (str[i]) 1199 i++; 1200 } 1201 1202 if (idx + 2 >= size) { 1203 char **nresult; 1204 size <<= 1; 1205 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1206 if (nresult == NULL) { 1207 el_free(result); 1208 return NULL; 1209 } 1210 result = nresult; 1211 } 1212 len = (size_t)i - (size_t)start; 1213 temp = el_calloc(len + 1, sizeof(*temp)); 1214 if (temp == NULL) { 1215 for (i = 0; i < idx; i++) 1216 el_free(result[i]); 1217 el_free(result); 1218 return NULL; 1219 } 1220 (void)strlcpy(temp, &str[start], len + 1); 1221 result[idx++] = temp; 1222 result[idx] = NULL; 1223 if (str[i]) 1224 i++; 1225 } 1226 return result; 1227 } 1228 1229 1230 /* 1231 * limit size of history record to ``max'' events 1232 */ 1233 void 1234 stifle_history(int max) 1235 { 1236 HistEvent ev; 1237 HIST_ENTRY *he; 1238 1239 if (h == NULL || e == NULL) 1240 rl_initialize(); 1241 1242 if (history(h, &ev, H_SETSIZE, max) == 0) { 1243 max_input_history = max; 1244 if (history_length > max) 1245 history_base = history_length - max; 1246 while (history_length > max) { 1247 he = remove_history(0); 1248 el_free(he->data); 1249 el_free((void *)(unsigned long)he->line); 1250 el_free(he); 1251 } 1252 } 1253 } 1254 1255 1256 /* 1257 * "unlimit" size of history - set the limit to maximum allowed int value 1258 */ 1259 int 1260 unstifle_history(void) 1261 { 1262 HistEvent ev; 1263 int omax; 1264 1265 history(h, &ev, H_SETSIZE, INT_MAX); 1266 omax = max_input_history; 1267 max_input_history = INT_MAX; 1268 return omax; /* some value _must_ be returned */ 1269 } 1270 1271 1272 int 1273 history_is_stifled(void) 1274 { 1275 1276 /* cannot return true answer */ 1277 return max_input_history != INT_MAX; 1278 } 1279 1280 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1281 1282 int 1283 history_truncate_file (const char *filename, int nlines) 1284 { 1285 int ret = 0; 1286 FILE *fp, *tp; 1287 char template[sizeof(_history_tmp_template)]; 1288 char buf[4096]; 1289 int fd; 1290 char *cp; 1291 off_t off; 1292 int count = 0; 1293 ssize_t left = 0; 1294 1295 if (filename == NULL && (filename = _default_history_file()) == NULL) 1296 return errno; 1297 if ((fp = fopen(filename, "r+")) == NULL) 1298 return errno; 1299 strcpy(template, _history_tmp_template); 1300 if ((fd = mkstemp(template)) == -1) { 1301 ret = errno; 1302 goto out1; 1303 } 1304 1305 if ((tp = fdopen(fd, "r+")) == NULL) { 1306 close(fd); 1307 ret = errno; 1308 goto out2; 1309 } 1310 1311 for(;;) { 1312 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1313 if (ferror(fp)) { 1314 ret = errno; 1315 break; 1316 } 1317 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1318 (off_t)-1) { 1319 ret = errno; 1320 break; 1321 } 1322 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1323 if (ferror(fp)) { 1324 ret = errno; 1325 break; 1326 } 1327 if (left == 0) { 1328 count--; 1329 left = sizeof(buf); 1330 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1331 != 1) { 1332 ret = errno; 1333 break; 1334 } 1335 fflush(tp); 1336 break; 1337 } 1338 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1339 ret = errno; 1340 break; 1341 } 1342 count++; 1343 } 1344 if (ret) 1345 goto out3; 1346 cp = buf + left - 1; 1347 if(*cp != '\n') 1348 cp++; 1349 for(;;) { 1350 while (--cp >= buf) { 1351 if (*cp == '\n') { 1352 if (--nlines == 0) { 1353 if (++cp >= buf + sizeof(buf)) { 1354 count++; 1355 cp = buf; 1356 } 1357 break; 1358 } 1359 } 1360 } 1361 if (nlines <= 0 || count == 0) 1362 break; 1363 count--; 1364 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1365 ret = errno; 1366 break; 1367 } 1368 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1369 if (ferror(tp)) { 1370 ret = errno; 1371 break; 1372 } 1373 ret = EAGAIN; 1374 break; 1375 } 1376 cp = buf + sizeof(buf); 1377 } 1378 1379 if (ret || nlines > 0) 1380 goto out3; 1381 1382 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1383 ret = errno; 1384 goto out3; 1385 } 1386 1387 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1388 (off_t)-1) { 1389 ret = errno; 1390 goto out3; 1391 } 1392 1393 for(;;) { 1394 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1395 if (ferror(fp)) 1396 ret = errno; 1397 break; 1398 } 1399 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1400 ret = errno; 1401 break; 1402 } 1403 } 1404 fflush(fp); 1405 if((off = ftello(fp)) > 0) 1406 (void)ftruncate(fileno(fp), off); 1407 out3: 1408 fclose(tp); 1409 out2: 1410 unlink(template); 1411 out1: 1412 fclose(fp); 1413 1414 return ret; 1415 } 1416 1417 1418 /* 1419 * read history from a file given 1420 */ 1421 int 1422 read_history(const char *filename) 1423 { 1424 HistEvent ev; 1425 1426 if (h == NULL || e == NULL) 1427 rl_initialize(); 1428 if (filename == NULL && (filename = _default_history_file()) == NULL) 1429 return errno; 1430 errno = 0; 1431 if (history(h, &ev, H_LOAD, filename) == -1) 1432 return errno ? errno : EINVAL; 1433 if (history(h, &ev, H_GETSIZE) == 0) 1434 history_length = ev.num; 1435 if (history_length < 0) 1436 return EINVAL; 1437 return 0; 1438 } 1439 1440 1441 /* 1442 * write history to a file given 1443 */ 1444 int 1445 write_history(const char *filename) 1446 { 1447 HistEvent ev; 1448 1449 if (h == NULL || e == NULL) 1450 rl_initialize(); 1451 if (filename == NULL && (filename = _default_history_file()) == NULL) 1452 return errno; 1453 return history(h, &ev, H_SAVE, filename) == -1 ? 1454 (errno ? errno : EINVAL) : 0; 1455 } 1456 1457 int 1458 append_history(int n, const char *filename) 1459 { 1460 HistEvent ev; 1461 FILE *fp; 1462 1463 if (h == NULL || e == NULL) 1464 rl_initialize(); 1465 if (filename == NULL && (filename = _default_history_file()) == NULL) 1466 return errno; 1467 1468 if ((fp = fopen(filename, "a")) == NULL) 1469 return errno; 1470 1471 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1472 int serrno = errno ? errno : EINVAL; 1473 fclose(fp); 1474 return serrno; 1475 } 1476 fclose(fp); 1477 return 0; 1478 } 1479 1480 /* 1481 * returns history ``num''th event 1482 * 1483 * returned pointer points to static variable 1484 */ 1485 HIST_ENTRY * 1486 history_get(int num) 1487 { 1488 static HIST_ENTRY she; 1489 HistEvent ev; 1490 int curr_num; 1491 1492 if (h == NULL || e == NULL) 1493 rl_initialize(); 1494 1495 if (num < history_base) 1496 return NULL; 1497 1498 /* save current position */ 1499 if (history(h, &ev, H_CURR) != 0) 1500 return NULL; 1501 curr_num = ev.num; 1502 1503 /* 1504 * use H_DELDATA to set to nth history (without delete) by passing 1505 * (void **)-1 -- as in history_set_pos 1506 */ 1507 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1508 goto out; 1509 1510 /* get current entry */ 1511 if (history(h, &ev, H_CURR) != 0) 1512 goto out; 1513 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1514 goto out; 1515 she.line = ev.str; 1516 1517 /* restore pointer to where it was */ 1518 (void)history(h, &ev, H_SET, curr_num); 1519 1520 return &she; 1521 1522 out: 1523 /* restore pointer to where it was */ 1524 (void)history(h, &ev, H_SET, curr_num); 1525 return NULL; 1526 } 1527 1528 1529 /* 1530 * add the line to history table 1531 */ 1532 int 1533 add_history(const char *line) 1534 { 1535 HistEvent ev; 1536 1537 if (h == NULL || e == NULL) 1538 rl_initialize(); 1539 1540 if (history(h, &ev, H_ENTER, line) == -1) 1541 return 0; 1542 1543 (void)history(h, &ev, H_GETSIZE); 1544 if (ev.num == history_length) 1545 history_base++; 1546 else { 1547 history_offset++; 1548 history_length = ev.num; 1549 } 1550 return 0; 1551 } 1552 1553 1554 /* 1555 * remove the specified entry from the history list and return it. 1556 */ 1557 HIST_ENTRY * 1558 remove_history(int num) 1559 { 1560 HIST_ENTRY *he; 1561 HistEvent ev; 1562 1563 if (h == NULL || e == NULL) 1564 rl_initialize(); 1565 1566 if ((he = el_malloc(sizeof(*he))) == NULL) 1567 return NULL; 1568 1569 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1570 el_free(he); 1571 return NULL; 1572 } 1573 1574 he->line = ev.str; 1575 if (history(h, &ev, H_GETSIZE) == 0) 1576 history_length = ev.num; 1577 1578 return he; 1579 } 1580 1581 1582 /* 1583 * replace the line and data of the num-th entry 1584 */ 1585 HIST_ENTRY * 1586 replace_history_entry(int num, const char *line, histdata_t data) 1587 { 1588 HIST_ENTRY *he; 1589 HistEvent ev; 1590 int curr_num; 1591 1592 if (h == NULL || e == NULL) 1593 rl_initialize(); 1594 1595 /* save current position */ 1596 if (history(h, &ev, H_CURR) != 0) 1597 return NULL; 1598 curr_num = ev.num; 1599 1600 /* start from the oldest */ 1601 if (history(h, &ev, H_LAST) != 0) 1602 return NULL; /* error */ 1603 1604 if ((he = el_malloc(sizeof(*he))) == NULL) 1605 return NULL; 1606 1607 /* look forwards for event matching specified offset */ 1608 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1609 goto out; 1610 1611 he->line = ev.str; 1612 if (he->line == NULL) 1613 goto out; 1614 1615 if (history(h, &ev, H_REPLACE, line, data)) 1616 goto out; 1617 1618 /* restore pointer to where it was */ 1619 if (history(h, &ev, H_SET, curr_num)) 1620 goto out; 1621 1622 return he; 1623 out: 1624 el_free(he); 1625 return NULL; 1626 } 1627 1628 /* 1629 * clear the history list - delete all entries 1630 */ 1631 void 1632 clear_history(void) 1633 { 1634 HistEvent ev; 1635 1636 if (h == NULL || e == NULL) 1637 rl_initialize(); 1638 1639 (void)history(h, &ev, H_CLEAR); 1640 history_offset = history_length = 0; 1641 } 1642 1643 1644 /* 1645 * returns offset of the current history event 1646 */ 1647 int 1648 where_history(void) 1649 { 1650 return history_offset; 1651 } 1652 1653 static HIST_ENTRY **_history_listp; 1654 static HIST_ENTRY *_history_list; 1655 1656 HIST_ENTRY ** 1657 history_list(void) 1658 { 1659 HistEvent ev; 1660 HIST_ENTRY **nlp, *nl; 1661 int i; 1662 1663 if (history(h, &ev, H_LAST) != 0) 1664 return NULL; 1665 1666 if ((nlp = el_realloc(_history_listp, 1667 ((size_t)history_length + 1) * sizeof(*nlp))) == NULL) 1668 return NULL; 1669 _history_listp = nlp; 1670 1671 if ((nl = el_realloc(_history_list, 1672 (size_t)history_length * sizeof(*nl))) == NULL) 1673 return NULL; 1674 _history_list = nl; 1675 1676 i = 0; 1677 do { 1678 _history_listp[i] = &_history_list[i]; 1679 _history_list[i].line = ev.str; 1680 _history_list[i].data = NULL; 1681 if (i++ == history_length) 1682 abort(); 1683 } while (history(h, &ev, H_PREV) == 0); 1684 _history_listp[i] = NULL; 1685 return _history_listp; 1686 } 1687 1688 /* 1689 * returns current history event or NULL if there is no such event 1690 */ 1691 HIST_ENTRY * 1692 current_history(void) 1693 { 1694 HistEvent ev; 1695 1696 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1697 return NULL; 1698 1699 rl_he.line = ev.str; 1700 rl_he.data = NULL; 1701 return &rl_he; 1702 } 1703 1704 1705 /* 1706 * returns total number of bytes history events' data are using 1707 */ 1708 int 1709 history_total_bytes(void) 1710 { 1711 HistEvent ev; 1712 int curr_num; 1713 size_t size; 1714 1715 if (history(h, &ev, H_CURR) != 0) 1716 return -1; 1717 curr_num = ev.num; 1718 1719 (void)history(h, &ev, H_FIRST); 1720 size = 0; 1721 do 1722 size += strlen(ev.str) * sizeof(*ev.str); 1723 while (history(h, &ev, H_NEXT) == 0); 1724 1725 /* get to the same position as before */ 1726 history(h, &ev, H_PREV_EVENT, curr_num); 1727 1728 return (int)size; 1729 } 1730 1731 1732 /* 1733 * sets the position in the history list to ``pos'' 1734 */ 1735 int 1736 history_set_pos(int pos) 1737 { 1738 if (pos >= history_length || pos < 0) 1739 return 0; 1740 1741 history_offset = pos; 1742 return 1; 1743 } 1744 1745 1746 /* 1747 * returns previous event in history and shifts pointer accordingly 1748 * Note that readline and editline define directions in opposite ways. 1749 */ 1750 HIST_ENTRY * 1751 previous_history(void) 1752 { 1753 HistEvent ev; 1754 1755 if (history_offset == 0) 1756 return NULL; 1757 1758 if (history(h, &ev, H_LAST) != 0) 1759 return NULL; 1760 1761 history_offset--; 1762 return current_history(); 1763 } 1764 1765 1766 /* 1767 * returns next event in history and shifts pointer accordingly 1768 */ 1769 HIST_ENTRY * 1770 next_history(void) 1771 { 1772 HistEvent ev; 1773 1774 if (history_offset >= history_length) 1775 return NULL; 1776 1777 if (history(h, &ev, H_LAST) != 0) 1778 return NULL; 1779 1780 history_offset++; 1781 return current_history(); 1782 } 1783 1784 1785 /* 1786 * searches for first history event containing the str 1787 */ 1788 int 1789 history_search(const char *str, int direction) 1790 { 1791 HistEvent ev; 1792 const char *strp; 1793 int curr_num; 1794 1795 if (history(h, &ev, H_CURR) != 0) 1796 return -1; 1797 curr_num = ev.num; 1798 1799 for (;;) { 1800 if ((strp = strstr(ev.str, str)) != NULL) 1801 return (int)(strp - ev.str); 1802 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1803 break; 1804 } 1805 (void)history(h, &ev, H_SET, curr_num); 1806 return -1; 1807 } 1808 1809 1810 /* 1811 * searches for first history event beginning with str 1812 */ 1813 int 1814 history_search_prefix(const char *str, int direction) 1815 { 1816 HistEvent ev; 1817 1818 return (history(h, &ev, direction < 0 ? 1819 H_PREV_STR : H_NEXT_STR, str)); 1820 } 1821 1822 1823 /* 1824 * search for event in history containing str, starting at offset 1825 * abs(pos); continue backward, if pos<0, forward otherwise 1826 */ 1827 /* ARGSUSED */ 1828 int 1829 history_search_pos(const char *str, 1830 int direction __attribute__((__unused__)), int pos) 1831 { 1832 HistEvent ev; 1833 int curr_num, off; 1834 1835 off = (pos > 0) ? pos : -pos; 1836 pos = (pos > 0) ? 1 : -1; 1837 1838 if (history(h, &ev, H_CURR) != 0) 1839 return -1; 1840 curr_num = ev.num; 1841 1842 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1843 return -1; 1844 1845 for (;;) { 1846 if (strstr(ev.str, str)) 1847 return off; 1848 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1849 break; 1850 } 1851 1852 /* set "current" pointer back to previous state */ 1853 (void)history(h, &ev, 1854 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1855 1856 return -1; 1857 } 1858 1859 1860 /********************************/ 1861 /* completion functions */ 1862 1863 char * 1864 tilde_expand(char *name) 1865 { 1866 return fn_tilde_expand(name); 1867 } 1868 1869 char * 1870 filename_completion_function(const char *name, int state) 1871 { 1872 return fn_filename_completion_function(name, state); 1873 } 1874 1875 /* 1876 * a completion generator for usernames; returns _first_ username 1877 * which starts with supplied text 1878 * text contains a partial username preceded by random character 1879 * (usually '~'); state resets search from start (??? should we do that anyway) 1880 * it's the caller's responsibility to free the returned value 1881 */ 1882 char * 1883 username_completion_function(const char *text, int state) 1884 { 1885 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1886 struct passwd pwres; 1887 char pwbuf[1024]; 1888 #endif 1889 struct passwd *pass = NULL; 1890 1891 if (text[0] == '\0') 1892 return NULL; 1893 1894 if (*text == '~') 1895 text++; 1896 1897 if (state == 0) 1898 setpwent(); 1899 1900 while ( 1901 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1902 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1903 #else 1904 (pass = getpwent()) != NULL 1905 #endif 1906 && text[0] == pass->pw_name[0] 1907 && strcmp(text, pass->pw_name) == 0) 1908 continue; 1909 1910 if (pass == NULL) { 1911 endpwent(); 1912 return NULL; 1913 } 1914 return strdup(pass->pw_name); 1915 } 1916 1917 1918 /* 1919 * el-compatible wrapper to send TSTP on ^Z 1920 */ 1921 /* ARGSUSED */ 1922 static unsigned char 1923 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1924 { 1925 (void)kill(0, SIGTSTP); 1926 return CC_NORM; 1927 } 1928 1929 static const char * 1930 /*ARGSUSED*/ 1931 _rl_completion_append_character_function(const char *dummy 1932 __attribute__((__unused__))) 1933 { 1934 static char buf[2]; 1935 buf[0] = (char)rl_completion_append_character; 1936 buf[1] = '\0'; 1937 return buf; 1938 } 1939 1940 1941 /* 1942 * Display list of strings in columnar format on readline's output stream. 1943 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1944 * 'max' is maximum length of string in 'matches'. 1945 */ 1946 void 1947 rl_display_match_list(char **matches, int len, int max) 1948 { 1949 1950 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1951 _rl_completion_append_character_function); 1952 } 1953 1954 /* 1955 * complete word at current point 1956 */ 1957 /* ARGSUSED */ 1958 int 1959 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1960 { 1961 static ct_buffer_t wbreak_conv, sprefix_conv; 1962 const char *breakchars; 1963 1964 if (h == NULL || e == NULL) 1965 rl_initialize(); 1966 1967 if (rl_inhibit_completion) { 1968 char arr[2]; 1969 arr[0] = (char)invoking_key; 1970 arr[1] = '\0'; 1971 el_insertstr(e, arr); 1972 return CC_REFRESH; 1973 } 1974 1975 if (rl_completion_word_break_hook != NULL) 1976 breakchars = (*rl_completion_word_break_hook)(); 1977 else 1978 breakchars = rl_basic_word_break_characters; 1979 1980 _rl_update_pos(); 1981 1982 /* Just look at how many global variables modify this operation! */ 1983 return fn_complete2(e, 1984 (rl_compentry_func_t *)rl_completion_entry_function, 1985 rl_attempted_completion_function, 1986 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1987 ct_decode_string(breakchars, &sprefix_conv), 1988 _rl_completion_append_character_function, 1989 (size_t)rl_completion_query_items, 1990 &rl_completion_type, &rl_attempted_completion_over, 1991 &rl_point, &rl_end, 0); 1992 1993 1994 } 1995 1996 1997 /* ARGSUSED */ 1998 static unsigned char 1999 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 2000 { 2001 return (unsigned char)rl_complete(0, ch); 2002 } 2003 2004 /* 2005 * misc other functions 2006 */ 2007 2008 /* 2009 * bind key c to readline-type function func 2010 */ 2011 int 2012 rl_bind_key(int c, rl_command_func_t *func) 2013 { 2014 int retval = -1; 2015 2016 if (h == NULL || e == NULL) 2017 rl_initialize(); 2018 2019 if (func == rl_insert) { 2020 /* XXX notice there is no range checking of ``c'' */ 2021 e->el_map.key[c] = ED_INSERT; 2022 retval = 0; 2023 } 2024 return retval; 2025 } 2026 2027 2028 /* 2029 * read one key from input - handles chars pushed back 2030 * to input stream also 2031 */ 2032 int 2033 rl_read_key(void) 2034 { 2035 char fooarr[2 * sizeof(int)]; 2036 2037 if (e == NULL || h == NULL) 2038 rl_initialize(); 2039 2040 return el_getc(e, fooarr); 2041 } 2042 2043 2044 /* 2045 * reset the terminal 2046 */ 2047 /* ARGSUSED */ 2048 int 2049 rl_reset_terminal(const char *p __attribute__((__unused__))) 2050 { 2051 2052 if (h == NULL || e == NULL) 2053 rl_initialize(); 2054 el_reset(e); 2055 return 0; 2056 } 2057 2058 2059 /* 2060 * insert character ``c'' back into input stream, ``count'' times 2061 */ 2062 int 2063 rl_insert(int count, int c) 2064 { 2065 char arr[2]; 2066 2067 if (h == NULL || e == NULL) 2068 rl_initialize(); 2069 2070 /* XXX - int -> char conversion can lose on multichars */ 2071 arr[0] = (char)c; 2072 arr[1] = '\0'; 2073 2074 for (; count > 0; count--) 2075 el_push(e, arr); 2076 2077 return 0; 2078 } 2079 2080 int 2081 rl_insert_text(const char *text) 2082 { 2083 if (!text || *text == 0) 2084 return 0; 2085 2086 if (h == NULL || e == NULL) 2087 rl_initialize(); 2088 2089 if (el_insertstr(e, text) < 0) 2090 return 0; 2091 return (int)strlen(text); 2092 } 2093 2094 /*ARGSUSED*/ 2095 int 2096 rl_newline(int count __attribute__((__unused__)), 2097 int c __attribute__((__unused__))) 2098 { 2099 /* 2100 * Readline-4.0 appears to ignore the args. 2101 */ 2102 return rl_insert(1, '\n'); 2103 } 2104 2105 /*ARGSUSED*/ 2106 static unsigned char 2107 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2108 { 2109 if (map[c] == NULL) 2110 return CC_ERROR; 2111 2112 _rl_update_pos(); 2113 2114 (*map[c])(1, c); 2115 2116 /* If rl_done was set by the above call, deal with it here */ 2117 if (rl_done) 2118 return CC_EOF; 2119 2120 return CC_NORM; 2121 } 2122 2123 int 2124 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2125 { 2126 char dest[8]; 2127 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2128 return -1; 2129 map[(unsigned char)c] = fun; 2130 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2131 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2132 el_set(e, EL_BIND, dest, name, NULL); 2133 return 0; 2134 } 2135 2136 void 2137 rl_callback_read_char(void) 2138 { 2139 int count = 0, done = 0; 2140 const char *buf = el_gets(e, &count); 2141 char *wbuf; 2142 2143 el_set(e, EL_UNBUFFERED, 1); 2144 if (buf == NULL || count-- <= 0) 2145 return; 2146 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2147 done = 1; 2148 if (buf[count] == '\n' || buf[count] == '\r') 2149 done = 2; 2150 2151 if (done && rl_linefunc != NULL) { 2152 el_set(e, EL_UNBUFFERED, 0); 2153 if (done == 2) { 2154 if ((wbuf = strdup(buf)) != NULL) 2155 wbuf[count] = '\0'; 2156 RL_SETSTATE(RL_STATE_DONE); 2157 } else 2158 wbuf = NULL; 2159 (*(void (*)(const char *))rl_linefunc)(wbuf); 2160 } 2161 _rl_update_pos(); 2162 } 2163 2164 void 2165 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2166 { 2167 if (e == NULL) { 2168 rl_initialize(); 2169 } 2170 (void)rl_set_prompt(prompt); 2171 rl_linefunc = linefunc; 2172 el_set(e, EL_UNBUFFERED, 1); 2173 } 2174 2175 void 2176 rl_callback_handler_remove(void) 2177 { 2178 el_set(e, EL_UNBUFFERED, 0); 2179 rl_linefunc = NULL; 2180 } 2181 2182 void 2183 rl_redisplay(void) 2184 { 2185 char a[2]; 2186 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2187 a[1] = '\0'; 2188 el_push(e, a); 2189 rl_forced_update_display(); 2190 } 2191 2192 int 2193 rl_get_previous_history(int count, int key) 2194 { 2195 char a[2]; 2196 a[0] = (char)key; 2197 a[1] = '\0'; 2198 while (count--) 2199 el_push(e, a); 2200 return 0; 2201 } 2202 2203 void 2204 /*ARGSUSED*/ 2205 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2206 { 2207 el_set(e, EL_PREP_TERM, 1); 2208 } 2209 2210 void 2211 rl_deprep_terminal(void) 2212 { 2213 el_set(e, EL_PREP_TERM, 0); 2214 } 2215 2216 int 2217 rl_read_init_file(const char *s) 2218 { 2219 return el_source(e, s); 2220 } 2221 2222 int 2223 rl_parse_and_bind(const char *line) 2224 { 2225 const char **argv; 2226 int argc; 2227 Tokenizer *tok; 2228 2229 tok = tok_init(NULL); 2230 tok_str(tok, line, &argc, &argv); 2231 argc = el_parse(e, argc, argv); 2232 tok_end(tok); 2233 return argc ? 1 : 0; 2234 } 2235 2236 int 2237 rl_variable_bind(const char *var, const char *value) 2238 { 2239 /* 2240 * The proper return value is undocument, but this is what the 2241 * readline source seems to do. 2242 */ 2243 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2244 } 2245 2246 int 2247 rl_stuff_char(int c) 2248 { 2249 char buf[2]; 2250 2251 buf[0] = (char)c; 2252 buf[1] = '\0'; 2253 el_insertstr(e, buf); 2254 return 1; 2255 } 2256 2257 static int 2258 _rl_event_read_char(EditLine *el, wchar_t *wc) 2259 { 2260 char ch; 2261 int n; 2262 ssize_t num_read = 0; 2263 2264 ch = '\0'; 2265 *wc = L'\0'; 2266 while (rl_event_hook) { 2267 2268 (*rl_event_hook)(); 2269 2270 #if defined(FIONREAD) 2271 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2272 return -1; 2273 if (n) 2274 num_read = read(el->el_infd, &ch, (size_t)1); 2275 else 2276 num_read = 0; 2277 #elif defined(F_SETFL) && defined(O_NDELAY) 2278 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2279 return -1; 2280 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2281 return -1; 2282 num_read = read(el->el_infd, &ch, 1); 2283 if (fcntl(el->el_infd, F_SETFL, n)) 2284 return -1; 2285 #else 2286 /* not non-blocking, but what you gonna do? */ 2287 num_read = read(el->el_infd, &ch, 1); 2288 return -1; 2289 #endif 2290 2291 if (num_read < 0 && errno == EAGAIN) 2292 continue; 2293 if (num_read == 0) 2294 continue; 2295 break; 2296 } 2297 if (!rl_event_hook) 2298 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2299 *wc = (wchar_t)ch; 2300 return (int)num_read; 2301 } 2302 2303 static void 2304 _rl_update_pos(void) 2305 { 2306 const LineInfo *li = el_line(e); 2307 2308 rl_point = (int)(li->cursor - li->buffer); 2309 rl_end = (int)(li->lastchar - li->buffer); 2310 rl_line_buffer[rl_end] = '\0'; 2311 } 2312 2313 char * 2314 rl_copy_text(int from, int to) 2315 { 2316 const LineInfo *li; 2317 size_t len; 2318 char * out; 2319 2320 if (h == NULL || e == NULL) 2321 rl_initialize(); 2322 2323 li = el_line(e); 2324 2325 if (from > to) 2326 return NULL; 2327 2328 if (li->buffer + from > li->lastchar) 2329 from = (int)(li->lastchar - li->buffer); 2330 2331 if (li->buffer + to > li->lastchar) 2332 to = (int)(li->lastchar - li->buffer); 2333 2334 len = (size_t)(to - from); 2335 out = el_malloc((size_t)len + 1); 2336 if (out == NULL) 2337 return NULL; 2338 (void)strlcpy(out, li->buffer + from , len); 2339 2340 return out; 2341 } 2342 2343 void 2344 rl_replace_line(const char * text, int clear_undo __attribute__((__unused__))) 2345 { 2346 if (!text || *text == 0) 2347 return; 2348 2349 if (h == NULL || e == NULL) 2350 rl_initialize(); 2351 2352 el_replacestr(e, text); 2353 } 2354 2355 int 2356 rl_delete_text(int start, int end) 2357 { 2358 2359 if (h == NULL || e == NULL) 2360 rl_initialize(); 2361 2362 return el_deletestr1(e, start, end); 2363 } 2364 2365 void 2366 rl_get_screen_size(int *rows, int *cols) 2367 { 2368 if (rows) 2369 el_get(e, EL_GETTC, "li", rows); 2370 if (cols) 2371 el_get(e, EL_GETTC, "co", cols); 2372 } 2373 2374 #define MAX_MESSAGE 160 2375 void 2376 rl_message(const char *format, ...) 2377 { 2378 char msg[MAX_MESSAGE]; 2379 va_list args; 2380 2381 va_start(args, format); 2382 vsnprintf(msg, sizeof(msg), format, args); 2383 va_end(args); 2384 2385 rl_set_prompt(msg); 2386 rl_forced_update_display(); 2387 } 2388 2389 void 2390 rl_set_screen_size(int rows, int cols) 2391 { 2392 char buf[64]; 2393 (void)snprintf(buf, sizeof(buf), "%d", rows); 2394 el_set(e, EL_SETTC, "li", buf, NULL); 2395 (void)snprintf(buf, sizeof(buf), "%d", cols); 2396 el_set(e, EL_SETTC, "co", buf, NULL); 2397 } 2398 2399 char ** 2400 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2401 { 2402 size_t len, max, i, j, min; 2403 char **list, *match, *a, *b; 2404 2405 len = 1; 2406 max = 10; 2407 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2408 return NULL; 2409 2410 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2411 list[len++] = match; 2412 if (len == max) { 2413 char **nl; 2414 max += 10; 2415 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2416 goto out; 2417 list = nl; 2418 } 2419 } 2420 if (len == 1) 2421 goto out; 2422 list[len] = NULL; 2423 if (len == 2) { 2424 if ((list[0] = strdup(list[1])) == NULL) 2425 goto out; 2426 return list; 2427 } 2428 qsort(&list[1], len - 1, sizeof(*list), 2429 (int (*)(const void *, const void *)) strcmp); 2430 min = SIZE_MAX; 2431 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2432 b = list[i + 1]; 2433 for (j = 0; a[j] && a[j] == b[j]; j++) 2434 continue; 2435 if (min > j) 2436 min = j; 2437 } 2438 if (min == 0 && *str) { 2439 if ((list[0] = strdup(str)) == NULL) 2440 goto out; 2441 } else { 2442 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2443 goto out; 2444 (void)memcpy(list[0], list[1], min); 2445 list[0][min] = '\0'; 2446 } 2447 return list; 2448 2449 out: 2450 el_free(list); 2451 return NULL; 2452 } 2453 2454 char * 2455 rl_filename_completion_function (const char *text, int state) 2456 { 2457 return fn_filename_completion_function(text, state); 2458 } 2459 2460 void 2461 rl_forced_update_display(void) 2462 { 2463 el_set(e, EL_REFRESH); 2464 } 2465 2466 int 2467 _rl_abort_internal(void) 2468 { 2469 el_beep(e); 2470 longjmp(topbuf, 1); 2471 /*NOTREACHED*/ 2472 } 2473 2474 int 2475 _rl_qsort_string_compare(char **s1, char **s2) 2476 { 2477 return strcoll(*s1, *s2); 2478 } 2479 2480 HISTORY_STATE * 2481 history_get_history_state(void) 2482 { 2483 HISTORY_STATE *hs; 2484 2485 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2486 return NULL; 2487 hs->length = history_length; 2488 return hs; 2489 } 2490 2491 int 2492 /*ARGSUSED*/ 2493 rl_kill_text(int from __attribute__((__unused__)), 2494 int to __attribute__((__unused__))) 2495 { 2496 return 0; 2497 } 2498 2499 Keymap 2500 rl_make_bare_keymap(void) 2501 { 2502 return NULL; 2503 } 2504 2505 Keymap 2506 rl_get_keymap(void) 2507 { 2508 return NULL; 2509 } 2510 2511 void 2512 /*ARGSUSED*/ 2513 rl_set_keymap(Keymap k __attribute__((__unused__))) 2514 { 2515 } 2516 2517 int 2518 /*ARGSUSED*/ 2519 rl_generic_bind(int type __attribute__((__unused__)), 2520 const char * keyseq __attribute__((__unused__)), 2521 const char * data __attribute__((__unused__)), 2522 Keymap k __attribute__((__unused__))) 2523 { 2524 return 0; 2525 } 2526 2527 int 2528 /*ARGSUSED*/ 2529 rl_bind_key_in_map(int key __attribute__((__unused__)), 2530 rl_command_func_t *fun __attribute__((__unused__)), 2531 Keymap k __attribute__((__unused__))) 2532 { 2533 return 0; 2534 } 2535 2536 int 2537 rl_set_key(const char *keyseq __attribute__((__unused__)), 2538 rl_command_func_t *function __attribute__((__unused__)), 2539 Keymap k __attribute__((__unused__))) 2540 { 2541 return 0; 2542 } 2543 2544 /* unsupported, but needed by python */ 2545 void 2546 rl_cleanup_after_signal(void) 2547 { 2548 } 2549 2550 int 2551 rl_on_new_line(void) 2552 { 2553 return 0; 2554 } 2555 2556 void 2557 rl_free_line_state(void) 2558 { 2559 } 2560 2561 int 2562 /*ARGSUSED*/ 2563 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2564 { 2565 return 0; 2566 } 2567 2568 void 2569 rl_resize_terminal(void) 2570 { 2571 el_resize(e); 2572 } 2573 2574 void 2575 rl_reset_after_signal(void) 2576 { 2577 if (rl_prep_term_function) 2578 (*rl_prep_term_function)(1); 2579 } 2580 2581 void 2582 rl_echo_signal_char(int sig) 2583 { 2584 int c = tty_get_signal_character(e, sig); 2585 if (c == -1) 2586 return; 2587 re_putc(e, c, 0); 2588 } 2589 2590 int 2591 rl_crlf(void) 2592 { 2593 re_putc(e, '\n', 0); 2594 return 0; 2595 } 2596 2597 int 2598 rl_ding(void) 2599 { 2600 re_putc(e, '\a', 0); 2601 return 0; 2602 } 2603 2604 int 2605 rl_abort(int count, int key) 2606 { 2607 return count && key ? 0 : 0; 2608 } 2609 2610 int 2611 rl_set_keymap_name(const char *name, Keymap k) 2612 { 2613 return name && k ? 0 : 0; 2614 } 2615 2616 histdata_t 2617 free_history_entry(HIST_ENTRY *he) 2618 { 2619 return he ? NULL : NULL; 2620 } 2621 2622 void 2623 _rl_erase_entire_line(void) 2624 { 2625 } 2626