readline.c revision 1.144
1 /* $NetBSD: readline.c,v 1.144 2017/09/17 08:10:08 kre 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 1.144 2017/09/17 08:10:08 kre Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <vis.h> 52 53 #include "readline/readline.h" 54 #include "el.h" 55 #include "fcns.h" 56 #include "filecomplete.h" 57 58 void rl_prep_terminal(int); 59 void rl_deprep_terminal(void); 60 61 /* for rl_complete() */ 62 #define TAB '\r' 63 64 /* see comment at the #ifdef for sense of this */ 65 /* #define GDB_411_HACK */ 66 67 /* readline compatibility stuff - look at readline sources/documentation */ 68 /* to see what these variables mean */ 69 const char *rl_library_version = "EditLine wrapper"; 70 int rl_readline_version = RL_READLINE_VERSION; 71 static char empty[] = { '\0' }; 72 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 73 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 74 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 75 char *rl_readline_name = empty; 76 FILE *rl_instream = NULL; 77 FILE *rl_outstream = NULL; 78 int rl_point = 0; 79 int rl_end = 0; 80 char *rl_line_buffer = NULL; 81 rl_vcpfunc_t *rl_linefunc = NULL; 82 int rl_done = 0; 83 VFunction *rl_event_hook = NULL; 84 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 85 emacs_meta_keymap, 86 emacs_ctlx_keymap; 87 /* 88 * The following is not implemented; we always catch signals in the 89 * libedit fashion: set handlers on entry to el_gets() and clear them 90 * on the way out. This simplistic approach works for most cases; if 91 * it does not work for your application, please let us know. 92 */ 93 int rl_catch_signals = 1; 94 int rl_catch_sigwinch = 1; 95 96 int history_base = 1; /* probably never subject to change */ 97 int history_length = 0; 98 int history_offset = 0; 99 int max_input_history = 0; 100 char history_expansion_char = '!'; 101 char history_subst_char = '^'; 102 char *history_no_expand_chars = expand_chars; 103 Function *history_inhibit_expansion_function = NULL; 104 char *history_arg_extract(int start, int end, const char *str); 105 106 int rl_inhibit_completion = 0; 107 int rl_attempted_completion_over = 0; 108 char *rl_basic_word_break_characters = break_chars; 109 char *rl_completer_word_break_characters = NULL; 110 char *rl_completer_quote_characters = NULL; 111 rl_compentry_func_t *rl_completion_entry_function = NULL; 112 char *(*rl_completion_word_break_hook)(void) = NULL; 113 rl_completion_func_t *rl_attempted_completion_function = NULL; 114 Function *rl_pre_input_hook = NULL; 115 Function *rl_startup1_hook = NULL; 116 int (*rl_getc_function)(FILE *) = NULL; 117 char *rl_terminal_name = NULL; 118 int rl_already_prompted = 0; 119 int rl_filename_completion_desired = 0; 120 int rl_ignore_completion_duplicates = 0; 121 int readline_echoing_p = 1; 122 int _rl_print_completions_horizontally = 0; 123 VFunction *rl_redisplay_function = NULL; 124 Function *rl_startup_hook = NULL; 125 int rl_did_startup_hook = 0; 126 VFunction *rl_completion_display_matches_hook = NULL; 127 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 128 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 129 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 130 131 /* 132 * The current prompt string. 133 */ 134 char *rl_prompt = NULL; 135 /* 136 * This is set to character indicating type of completion being done by 137 * rl_complete_internal(); this is available for application completion 138 * functions. 139 */ 140 int rl_completion_type = 0; 141 142 /* 143 * If more than this number of items results from query for possible 144 * completions, we ask user if they are sure to really display the list. 145 */ 146 int rl_completion_query_items = 100; 147 148 /* 149 * List of characters which are word break characters, but should be left 150 * in the parsed text when it is passed to the completion function. 151 * Shell uses this to help determine what kind of completing to do. 152 */ 153 char *rl_special_prefixes = NULL; 154 155 /* 156 * This is the character appended to the completed words if at the end of 157 * the line. Default is ' ' (a space). 158 */ 159 int rl_completion_append_character = ' '; 160 161 /* stuff below is used internally by libedit for readline emulation */ 162 163 static History *h = NULL; 164 static EditLine *e = NULL; 165 static rl_command_func_t *map[256]; 166 static jmp_buf topbuf; 167 168 /* internal functions */ 169 static unsigned char _el_rl_complete(EditLine *, int); 170 static unsigned char _el_rl_tstp(EditLine *, int); 171 static char *_get_prompt(EditLine *); 172 static int _getc_function(EditLine *, wchar_t *); 173 static int _history_expand_command(const char *, size_t, size_t, 174 char **); 175 static char *_rl_compat_sub(const char *, const char *, 176 const char *, int); 177 static int _rl_event_read_char(EditLine *, wchar_t *); 178 static void _rl_update_pos(void); 179 180 static HIST_ENTRY rl_he; 181 182 /* ARGSUSED */ 183 static char * 184 _get_prompt(EditLine *el __attribute__((__unused__))) 185 { 186 rl_already_prompted = 1; 187 return rl_prompt; 188 } 189 190 191 /* 192 * read one key from user defined input function 193 */ 194 static int 195 /*ARGSUSED*/ 196 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 197 { 198 int i; 199 200 i = (*rl_getc_function)(rl_instream); 201 if (i == -1) 202 return 0; 203 *c = (wchar_t)i; 204 return 1; 205 } 206 207 static void 208 _resize_fun(EditLine *el, void *a) 209 { 210 const LineInfo *li; 211 char **ap = a; 212 213 li = el_line(el); 214 /* a cheesy way to get rid of const cast. */ 215 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 216 } 217 218 static const char * 219 _default_history_file(void) 220 { 221 struct passwd *p; 222 static char *path; 223 size_t len; 224 225 if (path) 226 return path; 227 228 if ((p = getpwuid(getuid())) == NULL) 229 return NULL; 230 231 len = strlen(p->pw_dir) + sizeof("/.history"); 232 if ((path = malloc(len)) == NULL) 233 return NULL; 234 235 (void)snprintf(path, len, "%s/.history", p->pw_dir); 236 return path; 237 } 238 239 /* 240 * READLINE compatibility stuff 241 */ 242 243 /* 244 * Set the prompt 245 */ 246 int 247 rl_set_prompt(const char *prompt) 248 { 249 char *p; 250 251 if (!prompt) 252 prompt = ""; 253 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 254 return 0; 255 if (rl_prompt) 256 el_free(rl_prompt); 257 rl_prompt = strdup(prompt); 258 if (rl_prompt == NULL) 259 return -1; 260 261 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 262 *p = RL_PROMPT_START_IGNORE; 263 264 return 0; 265 } 266 267 /* 268 * initialize rl compat stuff 269 */ 270 int 271 rl_initialize(void) 272 { 273 HistEvent ev; 274 int editmode = 1; 275 struct termios t; 276 277 if (e != NULL) 278 el_end(e); 279 if (h != NULL) 280 history_end(h); 281 282 if (!rl_instream) 283 rl_instream = stdin; 284 if (!rl_outstream) 285 rl_outstream = stdout; 286 287 /* 288 * See if we don't really want to run the editor 289 */ 290 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 291 editmode = 0; 292 293 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 294 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 295 NO_RESET); 296 297 if (!editmode) 298 el_set(e, EL_EDITMODE, 0); 299 300 h = history_init(); 301 if (!e || !h) 302 return -1; 303 304 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 305 history_length = 0; 306 max_input_history = INT_MAX; 307 el_set(e, EL_HIST, history, h); 308 309 /* Setup resize function */ 310 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 311 312 /* setup getc function if valid */ 313 if (rl_getc_function) 314 el_set(e, EL_GETCFN, _getc_function); 315 316 /* for proper prompt printing in readline() */ 317 if (rl_set_prompt("") == -1) { 318 history_end(h); 319 el_end(e); 320 return -1; 321 } 322 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 323 el_set(e, EL_SIGNAL, rl_catch_signals); 324 325 /* set default mode to "emacs"-style and read setting afterwards */ 326 /* so this can be overridden */ 327 el_set(e, EL_EDITOR, "emacs"); 328 if (rl_terminal_name != NULL) 329 el_set(e, EL_TERMINAL, rl_terminal_name); 330 else 331 el_get(e, EL_TERMINAL, &rl_terminal_name); 332 333 /* 334 * Word completion - this has to go AFTER rebinding keys 335 * to emacs-style. 336 */ 337 el_set(e, EL_ADDFN, "rl_complete", 338 "ReadLine compatible completion function", 339 _el_rl_complete); 340 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 341 342 /* 343 * Send TSTP when ^Z is pressed. 344 */ 345 el_set(e, EL_ADDFN, "rl_tstp", 346 "ReadLine compatible suspend function", 347 _el_rl_tstp); 348 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 349 350 /* 351 * Set some readline compatible key-bindings. 352 */ 353 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 354 355 /* 356 * Allow the use of Home/End keys. 357 */ 358 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 359 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 360 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 361 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 362 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 363 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 364 365 /* 366 * Allow the use of the Delete/Insert keys. 367 */ 368 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 369 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 370 371 /* 372 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 373 */ 374 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 375 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 376 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 377 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 378 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 379 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 380 381 /* read settings from configuration file */ 382 el_source(e, NULL); 383 384 /* 385 * Unfortunately, some applications really do use rl_point 386 * and rl_line_buffer directly. 387 */ 388 _resize_fun(e, &rl_line_buffer); 389 _rl_update_pos(); 390 391 tty_end(e); 392 393 return 0; 394 } 395 396 397 /* 398 * read one line from input stream and return it, chomping 399 * trailing newline (if there is any) 400 */ 401 char * 402 readline(const char *p) 403 { 404 HistEvent ev; 405 const char * volatile prompt = p; 406 int count; 407 const char *ret; 408 char *buf; 409 static int used_event_hook; 410 411 if (e == NULL || h == NULL) 412 rl_initialize(); 413 if (rl_did_startup_hook == 0 && rl_startup_hook) { 414 rl_did_startup_hook = 1; 415 (*rl_startup_hook)(NULL, 0); 416 } 417 tty_init(e); 418 419 420 rl_done = 0; 421 422 (void)setjmp(topbuf); 423 buf = NULL; 424 425 /* update prompt accordingly to what has been passed */ 426 if (rl_set_prompt(prompt) == -1) 427 goto out; 428 429 if (rl_pre_input_hook) 430 (*rl_pre_input_hook)(NULL, 0); 431 432 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 433 el_set(e, EL_GETCFN, _rl_event_read_char); 434 used_event_hook = 1; 435 } 436 437 if (!rl_event_hook && used_event_hook) { 438 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 439 used_event_hook = 0; 440 } 441 442 rl_already_prompted = 0; 443 444 /* get one line from input stream */ 445 ret = el_gets(e, &count); 446 447 if (ret && count > 0) { 448 int lastidx; 449 450 buf = strdup(ret); 451 if (buf == NULL) 452 goto out; 453 lastidx = count - 1; 454 if (buf[lastidx] == '\n') 455 buf[lastidx] = '\0'; 456 } else 457 buf = NULL; 458 459 history(h, &ev, H_GETSIZE); 460 history_length = ev.num; 461 462 out: 463 tty_end(e); 464 return buf; 465 } 466 467 /* 468 * history functions 469 */ 470 471 /* 472 * is normally called before application starts to use 473 * history expansion functions 474 */ 475 void 476 using_history(void) 477 { 478 if (h == NULL || e == NULL) 479 rl_initialize(); 480 history_offset = history_length; 481 } 482 483 484 /* 485 * substitute ``what'' with ``with'', returning resulting string; if 486 * globally == 1, substitutes all occurrences of what, otherwise only the 487 * first one 488 */ 489 static char * 490 _rl_compat_sub(const char *str, const char *what, const char *with, 491 int globally) 492 { 493 const char *s; 494 char *r, *result; 495 size_t len, with_len, what_len; 496 497 len = strlen(str); 498 with_len = strlen(with); 499 what_len = strlen(what); 500 501 /* calculate length we need for result */ 502 s = str; 503 while (*s) { 504 if (*s == *what && !strncmp(s, what, what_len)) { 505 len += with_len - what_len; 506 if (!globally) 507 break; 508 s += what_len; 509 } else 510 s++; 511 } 512 r = result = el_malloc((len + 1) * sizeof(*r)); 513 if (result == NULL) 514 return NULL; 515 s = str; 516 while (*s) { 517 if (*s == *what && !strncmp(s, what, what_len)) { 518 (void)strncpy(r, with, with_len); 519 r += with_len; 520 s += what_len; 521 if (!globally) { 522 (void)strcpy(r, s); 523 return result; 524 } 525 } else 526 *r++ = *s++; 527 } 528 *r = '\0'; 529 return result; 530 } 531 532 static char *last_search_pat; /* last !?pat[?] search pattern */ 533 static char *last_search_match; /* last !?pat[?] that matched */ 534 535 const char * 536 get_history_event(const char *cmd, int *cindex, int qchar) 537 { 538 int idx, sign, sub, num, begin, ret; 539 size_t len; 540 char *pat; 541 const char *rptr; 542 HistEvent ev; 543 544 idx = *cindex; 545 if (cmd[idx++] != history_expansion_char) 546 return NULL; 547 548 /* find out which event to take */ 549 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 550 if (history(h, &ev, H_FIRST) != 0) 551 return NULL; 552 *cindex = cmd[idx]? (idx + 1):idx; 553 return ev.str; 554 } 555 sign = 0; 556 if (cmd[idx] == '-') { 557 sign = 1; 558 idx++; 559 } 560 561 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 562 HIST_ENTRY *he; 563 564 num = 0; 565 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 566 num = num * 10 + cmd[idx] - '0'; 567 idx++; 568 } 569 if (sign) 570 num = history_length - num + history_base; 571 572 if (!(he = history_get(num))) 573 return NULL; 574 575 *cindex = idx; 576 return he->line; 577 } 578 sub = 0; 579 if (cmd[idx] == '?') { 580 sub = 1; 581 idx++; 582 } 583 begin = idx; 584 while (cmd[idx]) { 585 if (cmd[idx] == '\n') 586 break; 587 if (sub && cmd[idx] == '?') 588 break; 589 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 590 || cmd[idx] == '\t' || cmd[idx] == qchar)) 591 break; 592 idx++; 593 } 594 len = (size_t)idx - (size_t)begin; 595 if (sub && cmd[idx] == '?') 596 idx++; 597 if (sub && len == 0 && last_search_pat && *last_search_pat) 598 pat = last_search_pat; 599 else if (len == 0) 600 return NULL; 601 else { 602 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 603 return NULL; 604 (void)strncpy(pat, cmd + begin, len); 605 pat[len] = '\0'; 606 } 607 608 if (history(h, &ev, H_CURR) != 0) { 609 if (pat != last_search_pat) 610 el_free(pat); 611 return NULL; 612 } 613 num = ev.num; 614 615 if (sub) { 616 if (pat != last_search_pat) { 617 if (last_search_pat) 618 el_free(last_search_pat); 619 last_search_pat = pat; 620 } 621 ret = history_search(pat, -1); 622 } else 623 ret = history_search_prefix(pat, -1); 624 625 if (ret == -1) { 626 /* restore to end of list on failed search */ 627 history(h, &ev, H_FIRST); 628 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 629 if (pat != last_search_pat) 630 el_free(pat); 631 return NULL; 632 } 633 634 if (sub && len) { 635 if (last_search_match && last_search_match != pat) 636 el_free(last_search_match); 637 last_search_match = pat; 638 } 639 640 if (pat != last_search_pat) 641 el_free(pat); 642 643 if (history(h, &ev, H_CURR) != 0) 644 return NULL; 645 *cindex = idx; 646 rptr = ev.str; 647 648 /* roll back to original position */ 649 (void)history(h, &ev, H_SET, num); 650 651 return rptr; 652 } 653 654 /* 655 * the real function doing history expansion - takes as argument command 656 * to do and data upon which the command should be executed 657 * does expansion the way I've understood readline documentation 658 * 659 * returns 0 if data was not modified, 1 if it was and 2 if the string 660 * should be only printed and not executed; in case of error, 661 * returns -1 and *result points to NULL 662 * it's the caller's responsibility to free() the string returned in *result 663 */ 664 static int 665 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 666 char **result) 667 { 668 char *tmp, *search = NULL, *aptr; 669 const char *ptr, *cmd; 670 static char *from = NULL, *to = NULL; 671 int start, end, idx, has_mods = 0; 672 int p_on = 0, g_on = 0; 673 674 *result = NULL; 675 aptr = NULL; 676 ptr = NULL; 677 678 /* First get event specifier */ 679 idx = 0; 680 681 if (strchr(":^*$", command[offs + 1])) { 682 char str[4]; 683 /* 684 * "!:" is shorthand for "!!:". 685 * "!^", "!*" and "!$" are shorthand for 686 * "!!:^", "!!:*" and "!!:$" respectively. 687 */ 688 str[0] = str[1] = '!'; 689 str[2] = '0'; 690 ptr = get_history_event(str, &idx, 0); 691 idx = (command[offs + 1] == ':')? 1:0; 692 has_mods = 1; 693 } else { 694 if (command[offs + 1] == '#') { 695 /* use command so far */ 696 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 697 == NULL) 698 return -1; 699 (void)strncpy(aptr, command, offs); 700 aptr[offs] = '\0'; 701 idx = 1; 702 } else { 703 int qchar; 704 705 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 706 ptr = get_history_event(command + offs, &idx, qchar); 707 } 708 has_mods = command[offs + (size_t)idx] == ':'; 709 } 710 711 if (ptr == NULL && aptr == NULL) 712 return -1; 713 714 if (!has_mods) { 715 *result = strdup(aptr ? aptr : ptr); 716 if (aptr) 717 el_free(aptr); 718 if (*result == NULL) 719 return -1; 720 return 1; 721 } 722 723 cmd = command + offs + idx + 1; 724 725 /* Now parse any word designators */ 726 727 if (*cmd == '%') /* last word matched by ?pat? */ 728 tmp = strdup(last_search_match? last_search_match:""); 729 else if (strchr("^*$-0123456789", *cmd)) { 730 start = end = -1; 731 if (*cmd == '^') 732 start = end = 1, cmd++; 733 else if (*cmd == '$') 734 start = -1, cmd++; 735 else if (*cmd == '*') 736 start = 1, cmd++; 737 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 738 start = 0; 739 while (*cmd && '0' <= *cmd && *cmd <= '9') 740 start = start * 10 + *cmd++ - '0'; 741 742 if (*cmd == '-') { 743 if (isdigit((unsigned char) cmd[1])) { 744 cmd++; 745 end = 0; 746 while (*cmd && '0' <= *cmd && *cmd <= '9') 747 end = end * 10 + *cmd++ - '0'; 748 } else if (cmd[1] == '$') { 749 cmd += 2; 750 end = -1; 751 } else { 752 cmd++; 753 end = -2; 754 } 755 } else if (*cmd == '*') 756 end = -1, cmd++; 757 else 758 end = start; 759 } 760 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 761 if (tmp == NULL) { 762 (void)fprintf(rl_outstream, "%s: Bad word specifier", 763 command + offs + idx); 764 if (aptr) 765 el_free(aptr); 766 return -1; 767 } 768 } else 769 tmp = strdup(aptr? aptr:ptr); 770 771 if (aptr) 772 el_free(aptr); 773 774 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 775 *result = tmp; 776 return 1; 777 } 778 779 for (; *cmd; cmd++) { 780 if (*cmd == ':') 781 continue; 782 else if (*cmd == 'h') { /* remove trailing path */ 783 if ((aptr = strrchr(tmp, '/')) != NULL) 784 *aptr = '\0'; 785 } else if (*cmd == 't') { /* remove leading path */ 786 if ((aptr = strrchr(tmp, '/')) != NULL) { 787 aptr = strdup(aptr + 1); 788 el_free(tmp); 789 tmp = aptr; 790 } 791 } else if (*cmd == 'r') { /* remove trailing suffix */ 792 if ((aptr = strrchr(tmp, '.')) != NULL) 793 *aptr = '\0'; 794 } else if (*cmd == 'e') { /* remove all but suffix */ 795 if ((aptr = strrchr(tmp, '.')) != NULL) { 796 aptr = strdup(aptr); 797 el_free(tmp); 798 tmp = aptr; 799 } 800 } else if (*cmd == 'p') /* print only */ 801 p_on = 1; 802 else if (*cmd == 'g') 803 g_on = 2; 804 else if (*cmd == 's' || *cmd == '&') { 805 char *what, *with, delim; 806 size_t len, from_len; 807 size_t size; 808 809 if (*cmd == '&' && (from == NULL || to == NULL)) 810 continue; 811 else if (*cmd == 's') { 812 delim = *(++cmd), cmd++; 813 size = 16; 814 what = el_realloc(from, size * sizeof(*what)); 815 if (what == NULL) { 816 el_free(from); 817 el_free(tmp); 818 return 0; 819 } 820 len = 0; 821 for (; *cmd && *cmd != delim; cmd++) { 822 if (*cmd == '\\' && cmd[1] == delim) 823 cmd++; 824 if (len >= size) { 825 char *nwhat; 826 nwhat = el_realloc(what, 827 (size <<= 1) * 828 sizeof(*nwhat)); 829 if (nwhat == NULL) { 830 el_free(what); 831 el_free(tmp); 832 return 0; 833 } 834 what = nwhat; 835 } 836 what[len++] = *cmd; 837 } 838 what[len] = '\0'; 839 from = what; 840 if (*what == '\0') { 841 el_free(what); 842 if (search) { 843 from = strdup(search); 844 if (from == NULL) { 845 el_free(tmp); 846 return 0; 847 } 848 } else { 849 from = NULL; 850 el_free(tmp); 851 return -1; 852 } 853 } 854 cmd++; /* shift after delim */ 855 if (!*cmd) 856 continue; 857 858 size = 16; 859 with = el_realloc(to, size * sizeof(*with)); 860 if (with == NULL) { 861 el_free(to); 862 el_free(tmp); 863 return -1; 864 } 865 len = 0; 866 from_len = strlen(from); 867 for (; *cmd && *cmd != delim; cmd++) { 868 if (len + from_len + 1 >= size) { 869 char *nwith; 870 size += from_len + 1; 871 nwith = el_realloc(with, 872 size * sizeof(*nwith)); 873 if (nwith == NULL) { 874 el_free(with); 875 el_free(tmp); 876 return -1; 877 } 878 with = nwith; 879 } 880 if (*cmd == '&') { 881 /* safe */ 882 (void)strcpy(&with[len], from); 883 len += from_len; 884 continue; 885 } 886 if (*cmd == '\\' 887 && (*(cmd + 1) == delim 888 || *(cmd + 1) == '&')) 889 cmd++; 890 with[len++] = *cmd; 891 } 892 with[len] = '\0'; 893 to = with; 894 } 895 896 aptr = _rl_compat_sub(tmp, from, to, g_on); 897 if (aptr) { 898 el_free(tmp); 899 tmp = aptr; 900 } 901 g_on = 0; 902 } 903 } 904 *result = tmp; 905 return p_on? 2:1; 906 } 907 908 909 /* 910 * csh-style history expansion 911 */ 912 int 913 history_expand(char *str, char **output) 914 { 915 int ret = 0; 916 size_t idx, i, size; 917 char *tmp, *result; 918 919 if (h == NULL || e == NULL) 920 rl_initialize(); 921 922 if (history_expansion_char == 0) { 923 *output = strdup(str); 924 return 0; 925 } 926 927 *output = NULL; 928 if (str[0] == history_subst_char) { 929 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 930 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 931 if (*output == NULL) 932 return 0; 933 (*output)[0] = (*output)[1] = history_expansion_char; 934 (*output)[2] = ':'; 935 (*output)[3] = 's'; 936 (void)strcpy((*output) + 4, str); 937 str = *output; 938 } else { 939 *output = strdup(str); 940 if (*output == NULL) 941 return 0; 942 } 943 944 #define ADD_STRING(what, len, fr) \ 945 { \ 946 if (idx + len + 1 > size) { \ 947 char *nresult = el_realloc(result, \ 948 (size += len + 1) * sizeof(*nresult)); \ 949 if (nresult == NULL) { \ 950 el_free(*output); \ 951 if (/*CONSTCOND*/fr) \ 952 el_free(tmp); \ 953 return 0; \ 954 } \ 955 result = nresult; \ 956 } \ 957 (void)strncpy(&result[idx], what, len); \ 958 idx += len; \ 959 result[idx] = '\0'; \ 960 } 961 962 result = NULL; 963 size = idx = 0; 964 tmp = NULL; 965 for (i = 0; str[i];) { 966 int qchar, loop_again; 967 size_t len, start, j; 968 969 qchar = 0; 970 loop_again = 1; 971 start = j = i; 972 loop: 973 for (; str[j]; j++) { 974 if (str[j] == '\\' && 975 str[j + 1] == history_expansion_char) { 976 len = strlen(&str[j + 1]) + 1; 977 memmove(&str[j], &str[j + 1], len); 978 continue; 979 } 980 if (!loop_again) { 981 if (isspace((unsigned char) str[j]) 982 || str[j] == qchar) 983 break; 984 } 985 if (str[j] == history_expansion_char 986 && !strchr(history_no_expand_chars, str[j + 1]) 987 && (!history_inhibit_expansion_function || 988 (*history_inhibit_expansion_function)(str, 989 (int)j) == 0)) 990 break; 991 } 992 993 if (str[j] && loop_again) { 994 i = j; 995 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 996 j++; 997 if (str[j] == history_expansion_char) 998 j++; 999 loop_again = 0; 1000 goto loop; 1001 } 1002 len = i - start; 1003 ADD_STRING(&str[start], len, 0); 1004 1005 if (str[i] == '\0' || str[i] != history_expansion_char) { 1006 len = j - i; 1007 ADD_STRING(&str[i], len, 0); 1008 if (start == 0) 1009 ret = 0; 1010 else 1011 ret = 1; 1012 break; 1013 } 1014 ret = _history_expand_command (str, i, (j - i), &tmp); 1015 if (ret > 0 && tmp) { 1016 len = strlen(tmp); 1017 ADD_STRING(tmp, len, 1); 1018 } 1019 if (tmp) { 1020 el_free(tmp); 1021 tmp = NULL; 1022 } 1023 i = j; 1024 } 1025 1026 /* ret is 2 for "print only" option */ 1027 if (ret == 2) { 1028 add_history(result); 1029 #ifdef GDB_411_HACK 1030 /* gdb 4.11 has been shipped with readline, where */ 1031 /* history_expand() returned -1 when the line */ 1032 /* should not be executed; in readline 2.1+ */ 1033 /* it should return 2 in such a case */ 1034 ret = -1; 1035 #endif 1036 } 1037 el_free(*output); 1038 *output = result; 1039 1040 return ret; 1041 } 1042 1043 /* 1044 * Return a string consisting of arguments of "str" from "start" to "end". 1045 */ 1046 char * 1047 history_arg_extract(int start, int end, const char *str) 1048 { 1049 size_t i, len, max; 1050 char **arr, *result = NULL; 1051 1052 arr = history_tokenize(str); 1053 if (!arr) 1054 return NULL; 1055 if (arr && *arr == NULL) 1056 goto out; 1057 1058 for (max = 0; arr[max]; max++) 1059 continue; 1060 max--; 1061 1062 if (start == '$') 1063 start = (int)max; 1064 if (end == '$') 1065 end = (int)max; 1066 if (end < 0) 1067 end = (int)max + end + 1; 1068 if (start < 0) 1069 start = end; 1070 1071 if (start < 0 || end < 0 || (size_t)start > max || 1072 (size_t)end > max || start > end) 1073 goto out; 1074 1075 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1076 len += strlen(arr[i]) + 1; 1077 len++; 1078 result = el_malloc(len * sizeof(*result)); 1079 if (result == NULL) 1080 goto out; 1081 1082 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1083 (void)strcpy(result + len, arr[i]); 1084 len += strlen(arr[i]); 1085 if (i < (size_t)end) 1086 result[len++] = ' '; 1087 } 1088 result[len] = '\0'; 1089 1090 out: 1091 for (i = 0; arr[i]; i++) 1092 el_free(arr[i]); 1093 el_free(arr); 1094 1095 return result; 1096 } 1097 1098 /* 1099 * Parse the string into individual tokens, 1100 * similar to how shell would do it. 1101 */ 1102 char ** 1103 history_tokenize(const char *str) 1104 { 1105 int size = 1, idx = 0, i, start; 1106 size_t len; 1107 char **result = NULL, *temp, delim = '\0'; 1108 1109 for (i = 0; str[i];) { 1110 while (isspace((unsigned char) str[i])) 1111 i++; 1112 start = i; 1113 for (; str[i];) { 1114 if (str[i] == '\\') { 1115 if (str[i+1] != '\0') 1116 i++; 1117 } else if (str[i] == delim) 1118 delim = '\0'; 1119 else if (!delim && 1120 (isspace((unsigned char) str[i]) || 1121 strchr("()<>;&|$", str[i]))) 1122 break; 1123 else if (!delim && strchr("'`\"", str[i])) 1124 delim = str[i]; 1125 if (str[i]) 1126 i++; 1127 } 1128 1129 if (idx + 2 >= size) { 1130 char **nresult; 1131 size <<= 1; 1132 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1133 if (nresult == NULL) { 1134 el_free(result); 1135 return NULL; 1136 } 1137 result = nresult; 1138 } 1139 len = (size_t)i - (size_t)start; 1140 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1141 if (temp == NULL) { 1142 for (i = 0; i < idx; i++) 1143 el_free(result[i]); 1144 el_free(result); 1145 return NULL; 1146 } 1147 (void)strncpy(temp, &str[start], len); 1148 temp[len] = '\0'; 1149 result[idx++] = temp; 1150 result[idx] = NULL; 1151 if (str[i]) 1152 i++; 1153 } 1154 return result; 1155 } 1156 1157 1158 /* 1159 * limit size of history record to ``max'' events 1160 */ 1161 void 1162 stifle_history(int max) 1163 { 1164 HistEvent ev; 1165 HIST_ENTRY *he; 1166 1167 if (h == NULL || e == NULL) 1168 rl_initialize(); 1169 1170 if (history(h, &ev, H_SETSIZE, max) == 0) { 1171 max_input_history = max; 1172 if (history_length > max) 1173 history_base = history_length - max; 1174 while (history_length > max) { 1175 he = remove_history(0); 1176 el_free(he->data); 1177 el_free((void *)(unsigned long)he->line); 1178 el_free(he); 1179 } 1180 } 1181 } 1182 1183 1184 /* 1185 * "unlimit" size of history - set the limit to maximum allowed int value 1186 */ 1187 int 1188 unstifle_history(void) 1189 { 1190 HistEvent ev; 1191 int omax; 1192 1193 history(h, &ev, H_SETSIZE, INT_MAX); 1194 omax = max_input_history; 1195 max_input_history = INT_MAX; 1196 return omax; /* some value _must_ be returned */ 1197 } 1198 1199 1200 int 1201 history_is_stifled(void) 1202 { 1203 1204 /* cannot return true answer */ 1205 return max_input_history != INT_MAX; 1206 } 1207 1208 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1209 1210 int 1211 history_truncate_file (const char *filename, int nlines) 1212 { 1213 int ret = 0; 1214 FILE *fp, *tp; 1215 char template[sizeof(_history_tmp_template)]; 1216 char buf[4096]; 1217 int fd; 1218 char *cp; 1219 off_t off; 1220 int count = 0; 1221 ssize_t left = 0; 1222 1223 if (filename == NULL && (filename = _default_history_file()) == NULL) 1224 return errno; 1225 if ((fp = fopen(filename, "r+")) == NULL) 1226 return errno; 1227 strcpy(template, _history_tmp_template); 1228 if ((fd = mkstemp(template)) == -1) { 1229 ret = errno; 1230 goto out1; 1231 } 1232 1233 if ((tp = fdopen(fd, "r+")) == NULL) { 1234 close(fd); 1235 ret = errno; 1236 goto out2; 1237 } 1238 1239 for(;;) { 1240 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1241 if (ferror(fp)) { 1242 ret = errno; 1243 break; 1244 } 1245 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1246 (off_t)-1) { 1247 ret = errno; 1248 break; 1249 } 1250 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1251 if (ferror(fp)) { 1252 ret = errno; 1253 break; 1254 } 1255 if (left == 0) { 1256 count--; 1257 left = sizeof(buf); 1258 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1259 != 1) { 1260 ret = errno; 1261 break; 1262 } 1263 fflush(tp); 1264 break; 1265 } 1266 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1267 ret = errno; 1268 break; 1269 } 1270 count++; 1271 } 1272 if (ret) 1273 goto out3; 1274 cp = buf + left - 1; 1275 if(*cp != '\n') 1276 cp++; 1277 for(;;) { 1278 while (--cp >= buf) { 1279 if (*cp == '\n') { 1280 if (--nlines == 0) { 1281 if (++cp >= buf + sizeof(buf)) { 1282 count++; 1283 cp = buf; 1284 } 1285 break; 1286 } 1287 } 1288 } 1289 if (nlines <= 0 || count == 0) 1290 break; 1291 count--; 1292 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1293 ret = errno; 1294 break; 1295 } 1296 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1297 if (ferror(tp)) { 1298 ret = errno; 1299 break; 1300 } 1301 ret = EAGAIN; 1302 break; 1303 } 1304 cp = buf + sizeof(buf); 1305 } 1306 1307 if (ret || nlines > 0) 1308 goto out3; 1309 1310 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1311 ret = errno; 1312 goto out3; 1313 } 1314 1315 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1316 (off_t)-1) { 1317 ret = errno; 1318 goto out3; 1319 } 1320 1321 for(;;) { 1322 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1323 if (ferror(fp)) 1324 ret = errno; 1325 break; 1326 } 1327 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1328 ret = errno; 1329 break; 1330 } 1331 } 1332 fflush(fp); 1333 if((off = ftello(fp)) > 0) 1334 (void)ftruncate(fileno(fp), off); 1335 out3: 1336 fclose(tp); 1337 out2: 1338 unlink(template); 1339 out1: 1340 fclose(fp); 1341 1342 return ret; 1343 } 1344 1345 1346 /* 1347 * read history from a file given 1348 */ 1349 int 1350 read_history(const char *filename) 1351 { 1352 HistEvent ev; 1353 1354 if (h == NULL || e == NULL) 1355 rl_initialize(); 1356 if (filename == NULL && (filename = _default_history_file()) == NULL) 1357 return errno; 1358 errno = 0; 1359 if (history(h, &ev, H_LOAD, filename) == -1) 1360 return errno ? errno : EINVAL; 1361 if (history(h, &ev, H_GETSIZE) == 0) 1362 history_length = ev.num; 1363 if (history_length < 0) 1364 return EINVAL; 1365 return 0; 1366 } 1367 1368 1369 /* 1370 * write history to a file given 1371 */ 1372 int 1373 write_history(const char *filename) 1374 { 1375 HistEvent ev; 1376 1377 if (h == NULL || e == NULL) 1378 rl_initialize(); 1379 if (filename == NULL && (filename = _default_history_file()) == NULL) 1380 return errno; 1381 return history(h, &ev, H_SAVE, filename) == -1 ? 1382 (errno ? errno : EINVAL) : 0; 1383 } 1384 1385 int 1386 append_history(int n, const char *filename) 1387 { 1388 HistEvent ev; 1389 FILE *fp; 1390 1391 if (h == NULL || e == NULL) 1392 rl_initialize(); 1393 if (filename == NULL && (filename = _default_history_file()) == NULL) 1394 return errno; 1395 1396 if ((fp = fopen(filename, "a")) == NULL) 1397 return errno; 1398 1399 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1400 int serrno = errno ? errno : EINVAL; 1401 fclose(fp); 1402 return serrno; 1403 } 1404 fclose(fp); 1405 return 0; 1406 } 1407 1408 /* 1409 * returns history ``num''th event 1410 * 1411 * returned pointer points to static variable 1412 */ 1413 HIST_ENTRY * 1414 history_get(int num) 1415 { 1416 static HIST_ENTRY she; 1417 HistEvent ev; 1418 int curr_num; 1419 1420 if (h == NULL || e == NULL) 1421 rl_initialize(); 1422 1423 if (num < history_base) 1424 return NULL; 1425 1426 /* save current position */ 1427 if (history(h, &ev, H_CURR) != 0) 1428 return NULL; 1429 curr_num = ev.num; 1430 1431 /* 1432 * use H_DELDATA to set to nth history (without delete) by passing 1433 * (void **)-1 -- as in history_set_pos 1434 */ 1435 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1436 goto out; 1437 1438 /* get current entry */ 1439 if (history(h, &ev, H_CURR) != 0) 1440 goto out; 1441 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1442 goto out; 1443 she.line = ev.str; 1444 1445 /* restore pointer to where it was */ 1446 (void)history(h, &ev, H_SET, curr_num); 1447 1448 return &she; 1449 1450 out: 1451 /* restore pointer to where it was */ 1452 (void)history(h, &ev, H_SET, curr_num); 1453 return NULL; 1454 } 1455 1456 1457 /* 1458 * add the line to history table 1459 */ 1460 int 1461 add_history(const char *line) 1462 { 1463 HistEvent ev; 1464 1465 if (h == NULL || e == NULL) 1466 rl_initialize(); 1467 1468 if (history(h, &ev, H_ENTER, line) == -1) 1469 return 0; 1470 1471 (void)history(h, &ev, H_GETSIZE); 1472 if (ev.num == history_length) 1473 history_base++; 1474 else 1475 history_length = ev.num; 1476 return 0; 1477 } 1478 1479 1480 /* 1481 * remove the specified entry from the history list and return it. 1482 */ 1483 HIST_ENTRY * 1484 remove_history(int num) 1485 { 1486 HIST_ENTRY *he; 1487 HistEvent ev; 1488 1489 if (h == NULL || e == NULL) 1490 rl_initialize(); 1491 1492 if ((he = el_malloc(sizeof(*he))) == NULL) 1493 return NULL; 1494 1495 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1496 el_free(he); 1497 return NULL; 1498 } 1499 1500 he->line = ev.str; 1501 if (history(h, &ev, H_GETSIZE) == 0) 1502 history_length = ev.num; 1503 1504 return he; 1505 } 1506 1507 1508 /* 1509 * replace the line and data of the num-th entry 1510 */ 1511 HIST_ENTRY * 1512 replace_history_entry(int num, const char *line, histdata_t data) 1513 { 1514 HIST_ENTRY *he; 1515 HistEvent ev; 1516 int curr_num; 1517 1518 if (h == NULL || e == NULL) 1519 rl_initialize(); 1520 1521 /* save current position */ 1522 if (history(h, &ev, H_CURR) != 0) 1523 return NULL; 1524 curr_num = ev.num; 1525 1526 /* start from the oldest */ 1527 if (history(h, &ev, H_LAST) != 0) 1528 return NULL; /* error */ 1529 1530 if ((he = el_malloc(sizeof(*he))) == NULL) 1531 return NULL; 1532 1533 /* look forwards for event matching specified offset */ 1534 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1535 goto out; 1536 1537 he->line = strdup(ev.str); 1538 if (he->line == NULL) 1539 goto out; 1540 1541 if (history(h, &ev, H_REPLACE, line, data)) 1542 goto out; 1543 1544 /* restore pointer to where it was */ 1545 if (history(h, &ev, H_SET, curr_num)) 1546 goto out; 1547 1548 return he; 1549 out: 1550 el_free(he); 1551 return NULL; 1552 } 1553 1554 /* 1555 * clear the history list - delete all entries 1556 */ 1557 void 1558 clear_history(void) 1559 { 1560 HistEvent ev; 1561 1562 if (h == NULL || e == NULL) 1563 rl_initialize(); 1564 1565 (void)history(h, &ev, H_CLEAR); 1566 history_offset = history_length = 0; 1567 } 1568 1569 1570 /* 1571 * returns offset of the current history event 1572 */ 1573 int 1574 where_history(void) 1575 { 1576 return history_offset; 1577 } 1578 1579 static HIST_ENTRY **_history_listp; 1580 static HIST_ENTRY *_history_list; 1581 1582 HIST_ENTRY ** 1583 history_list(void) 1584 { 1585 HistEvent ev; 1586 HIST_ENTRY **nlp, *nl; 1587 int i; 1588 1589 if (history(h, &ev, H_LAST) != 0) 1590 return NULL; 1591 1592 if ((nlp = el_realloc(_history_listp, 1593 (size_t)history_length * sizeof(*nlp))) == NULL) 1594 return NULL; 1595 _history_listp = nlp; 1596 1597 if ((nl = el_realloc(_history_list, 1598 (size_t)history_length * sizeof(*nl))) == NULL) 1599 return NULL; 1600 _history_list = nl; 1601 1602 i = 0; 1603 do { 1604 _history_listp[i] = &_history_list[i]; 1605 _history_list[i].line = ev.str; 1606 _history_list[i].data = NULL; 1607 if (i++ == history_length) 1608 abort(); 1609 } while (history(h, &ev, H_PREV) == 0); 1610 return _history_listp; 1611 } 1612 1613 /* 1614 * returns current history event or NULL if there is no such event 1615 */ 1616 HIST_ENTRY * 1617 current_history(void) 1618 { 1619 HistEvent ev; 1620 1621 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1622 return NULL; 1623 1624 rl_he.line = ev.str; 1625 rl_he.data = NULL; 1626 return &rl_he; 1627 } 1628 1629 1630 /* 1631 * returns total number of bytes history events' data are using 1632 */ 1633 int 1634 history_total_bytes(void) 1635 { 1636 HistEvent ev; 1637 int curr_num; 1638 size_t size; 1639 1640 if (history(h, &ev, H_CURR) != 0) 1641 return -1; 1642 curr_num = ev.num; 1643 1644 (void)history(h, &ev, H_FIRST); 1645 size = 0; 1646 do 1647 size += strlen(ev.str) * sizeof(*ev.str); 1648 while (history(h, &ev, H_NEXT) == 0); 1649 1650 /* get to the same position as before */ 1651 history(h, &ev, H_PREV_EVENT, curr_num); 1652 1653 return (int)size; 1654 } 1655 1656 1657 /* 1658 * sets the position in the history list to ``pos'' 1659 */ 1660 int 1661 history_set_pos(int pos) 1662 { 1663 if (pos >= history_length || pos < 0) 1664 return 0; 1665 1666 history_offset = pos; 1667 return 1; 1668 } 1669 1670 1671 /* 1672 * returns previous event in history and shifts pointer accordingly 1673 * Note that readline and editline define directions in opposite ways. 1674 */ 1675 HIST_ENTRY * 1676 previous_history(void) 1677 { 1678 HistEvent ev; 1679 1680 if (history_offset == 0) 1681 return NULL; 1682 1683 if (history(h, &ev, H_LAST) != 0) 1684 return NULL; 1685 1686 history_offset--; 1687 return current_history(); 1688 } 1689 1690 1691 /* 1692 * returns next event in history and shifts pointer accordingly 1693 */ 1694 HIST_ENTRY * 1695 next_history(void) 1696 { 1697 HistEvent ev; 1698 1699 if (history_offset >= history_length) 1700 return NULL; 1701 1702 if (history(h, &ev, H_LAST) != 0) 1703 return NULL; 1704 1705 history_offset++; 1706 return current_history(); 1707 } 1708 1709 1710 /* 1711 * searches for first history event containing the str 1712 */ 1713 int 1714 history_search(const char *str, int direction) 1715 { 1716 HistEvent ev; 1717 const char *strp; 1718 int curr_num; 1719 1720 if (history(h, &ev, H_CURR) != 0) 1721 return -1; 1722 curr_num = ev.num; 1723 1724 for (;;) { 1725 if ((strp = strstr(ev.str, str)) != NULL) 1726 return (int)(strp - ev.str); 1727 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1728 break; 1729 } 1730 (void)history(h, &ev, H_SET, curr_num); 1731 return -1; 1732 } 1733 1734 1735 /* 1736 * searches for first history event beginning with str 1737 */ 1738 int 1739 history_search_prefix(const char *str, int direction) 1740 { 1741 HistEvent ev; 1742 1743 return (history(h, &ev, direction < 0 ? 1744 H_PREV_STR : H_NEXT_STR, str)); 1745 } 1746 1747 1748 /* 1749 * search for event in history containing str, starting at offset 1750 * abs(pos); continue backward, if pos<0, forward otherwise 1751 */ 1752 /* ARGSUSED */ 1753 int 1754 history_search_pos(const char *str, 1755 int direction __attribute__((__unused__)), int pos) 1756 { 1757 HistEvent ev; 1758 int curr_num, off; 1759 1760 off = (pos > 0) ? pos : -pos; 1761 pos = (pos > 0) ? 1 : -1; 1762 1763 if (history(h, &ev, H_CURR) != 0) 1764 return -1; 1765 curr_num = ev.num; 1766 1767 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1768 return -1; 1769 1770 for (;;) { 1771 if (strstr(ev.str, str)) 1772 return off; 1773 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1774 break; 1775 } 1776 1777 /* set "current" pointer back to previous state */ 1778 (void)history(h, &ev, 1779 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1780 1781 return -1; 1782 } 1783 1784 1785 /********************************/ 1786 /* completion functions */ 1787 1788 char * 1789 tilde_expand(char *name) 1790 { 1791 return fn_tilde_expand(name); 1792 } 1793 1794 char * 1795 filename_completion_function(const char *name, int state) 1796 { 1797 return fn_filename_completion_function(name, state); 1798 } 1799 1800 /* 1801 * a completion generator for usernames; returns _first_ username 1802 * which starts with supplied text 1803 * text contains a partial username preceded by random character 1804 * (usually '~'); state resets search from start (??? should we do that anyway) 1805 * it's the caller's responsibility to free the returned value 1806 */ 1807 char * 1808 username_completion_function(const char *text, int state) 1809 { 1810 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1811 struct passwd pwres; 1812 char pwbuf[1024]; 1813 #endif 1814 struct passwd *pass = NULL; 1815 1816 if (text[0] == '\0') 1817 return NULL; 1818 1819 if (*text == '~') 1820 text++; 1821 1822 if (state == 0) 1823 setpwent(); 1824 1825 while ( 1826 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1827 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1828 #else 1829 (pass = getpwent()) != NULL 1830 #endif 1831 && text[0] == pass->pw_name[0] 1832 && strcmp(text, pass->pw_name) == 0) 1833 continue; 1834 1835 if (pass == NULL) { 1836 endpwent(); 1837 return NULL; 1838 } 1839 return strdup(pass->pw_name); 1840 } 1841 1842 1843 /* 1844 * el-compatible wrapper to send TSTP on ^Z 1845 */ 1846 /* ARGSUSED */ 1847 static unsigned char 1848 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1849 { 1850 (void)kill(0, SIGTSTP); 1851 return CC_NORM; 1852 } 1853 1854 static const char * 1855 /*ARGSUSED*/ 1856 _rl_completion_append_character_function(const char *dummy 1857 __attribute__((__unused__))) 1858 { 1859 static char buf[2]; 1860 buf[0] = (char)rl_completion_append_character; 1861 buf[1] = '\0'; 1862 return buf; 1863 } 1864 1865 1866 /* 1867 * Display list of strings in columnar format on readline's output stream. 1868 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1869 * 'max' is maximum length of string in 'matches'. 1870 */ 1871 void 1872 rl_display_match_list(char **matches, int len, int max) 1873 { 1874 1875 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1876 _rl_completion_append_character_function); 1877 } 1878 1879 /* 1880 * complete word at current point 1881 */ 1882 /* ARGSUSED */ 1883 int 1884 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1885 { 1886 static ct_buffer_t wbreak_conv, sprefix_conv; 1887 char *breakchars; 1888 1889 if (h == NULL || e == NULL) 1890 rl_initialize(); 1891 1892 if (rl_inhibit_completion) { 1893 char arr[2]; 1894 arr[0] = (char)invoking_key; 1895 arr[1] = '\0'; 1896 el_insertstr(e, arr); 1897 return CC_REFRESH; 1898 } 1899 1900 if (rl_completion_word_break_hook != NULL) 1901 breakchars = (*rl_completion_word_break_hook)(); 1902 else 1903 breakchars = rl_basic_word_break_characters; 1904 1905 _rl_update_pos(); 1906 1907 /* Just look at how many global variables modify this operation! */ 1908 return fn_complete(e, 1909 (rl_compentry_func_t *)rl_completion_entry_function, 1910 rl_attempted_completion_function, 1911 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1912 ct_decode_string(breakchars, &sprefix_conv), 1913 _rl_completion_append_character_function, 1914 (size_t)rl_completion_query_items, 1915 &rl_completion_type, &rl_attempted_completion_over, 1916 &rl_point, &rl_end); 1917 1918 1919 } 1920 1921 1922 /* ARGSUSED */ 1923 static unsigned char 1924 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1925 { 1926 return (unsigned char)rl_complete(0, ch); 1927 } 1928 1929 /* 1930 * misc other functions 1931 */ 1932 1933 /* 1934 * bind key c to readline-type function func 1935 */ 1936 int 1937 rl_bind_key(int c, rl_command_func_t *func) 1938 { 1939 int retval = -1; 1940 1941 if (h == NULL || e == NULL) 1942 rl_initialize(); 1943 1944 if (func == rl_insert) { 1945 /* XXX notice there is no range checking of ``c'' */ 1946 e->el_map.key[c] = ED_INSERT; 1947 retval = 0; 1948 } 1949 return retval; 1950 } 1951 1952 1953 /* 1954 * read one key from input - handles chars pushed back 1955 * to input stream also 1956 */ 1957 int 1958 rl_read_key(void) 1959 { 1960 char fooarr[2 * sizeof(int)]; 1961 1962 if (e == NULL || h == NULL) 1963 rl_initialize(); 1964 1965 return el_getc(e, fooarr); 1966 } 1967 1968 1969 /* 1970 * reset the terminal 1971 */ 1972 /* ARGSUSED */ 1973 void 1974 rl_reset_terminal(const char *p __attribute__((__unused__))) 1975 { 1976 1977 if (h == NULL || e == NULL) 1978 rl_initialize(); 1979 el_reset(e); 1980 } 1981 1982 1983 /* 1984 * insert character ``c'' back into input stream, ``count'' times 1985 */ 1986 int 1987 rl_insert(int count, int c) 1988 { 1989 char arr[2]; 1990 1991 if (h == NULL || e == NULL) 1992 rl_initialize(); 1993 1994 /* XXX - int -> char conversion can lose on multichars */ 1995 arr[0] = (char)c; 1996 arr[1] = '\0'; 1997 1998 for (; count > 0; count--) 1999 el_push(e, arr); 2000 2001 return 0; 2002 } 2003 2004 int 2005 rl_insert_text(const char *text) 2006 { 2007 if (!text || *text == 0) 2008 return 0; 2009 2010 if (h == NULL || e == NULL) 2011 rl_initialize(); 2012 2013 if (el_insertstr(e, text) < 0) 2014 return 0; 2015 return (int)strlen(text); 2016 } 2017 2018 /*ARGSUSED*/ 2019 int 2020 rl_newline(int count __attribute__((__unused__)), 2021 int c __attribute__((__unused__))) 2022 { 2023 /* 2024 * Readline-4.0 appears to ignore the args. 2025 */ 2026 return rl_insert(1, '\n'); 2027 } 2028 2029 /*ARGSUSED*/ 2030 static unsigned char 2031 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2032 { 2033 if (map[c] == NULL) 2034 return CC_ERROR; 2035 2036 _rl_update_pos(); 2037 2038 (*map[c])(1, c); 2039 2040 /* If rl_done was set by the above call, deal with it here */ 2041 if (rl_done) 2042 return CC_EOF; 2043 2044 return CC_NORM; 2045 } 2046 2047 int 2048 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2049 { 2050 char dest[8]; 2051 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2052 return -1; 2053 map[(unsigned char)c] = fun; 2054 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2055 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2056 el_set(e, EL_BIND, dest, name, NULL); 2057 return 0; 2058 } 2059 2060 void 2061 rl_callback_read_char(void) 2062 { 2063 int count = 0, done = 0; 2064 const char *buf = el_gets(e, &count); 2065 char *wbuf; 2066 2067 if (buf == NULL || count-- <= 0) 2068 return; 2069 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2070 done = 1; 2071 if (buf[count] == '\n' || buf[count] == '\r') 2072 done = 2; 2073 2074 if (done && rl_linefunc != NULL) { 2075 el_set(e, EL_UNBUFFERED, 0); 2076 if (done == 2) { 2077 if ((wbuf = strdup(buf)) != NULL) 2078 wbuf[count] = '\0'; 2079 } else 2080 wbuf = NULL; 2081 (*(void (*)(const char *))rl_linefunc)(wbuf); 2082 el_set(e, EL_UNBUFFERED, 1); 2083 } 2084 } 2085 2086 void 2087 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2088 { 2089 if (e == NULL) { 2090 rl_initialize(); 2091 } 2092 (void)rl_set_prompt(prompt); 2093 rl_linefunc = linefunc; 2094 el_set(e, EL_UNBUFFERED, 1); 2095 } 2096 2097 void 2098 rl_callback_handler_remove(void) 2099 { 2100 rl_linefunc = NULL; 2101 el_end(e); 2102 e = NULL; 2103 } 2104 2105 void 2106 rl_redisplay(void) 2107 { 2108 char a[2]; 2109 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2110 a[1] = '\0'; 2111 el_push(e, a); 2112 } 2113 2114 int 2115 rl_get_previous_history(int count, int key) 2116 { 2117 char a[2]; 2118 a[0] = (char)key; 2119 a[1] = '\0'; 2120 while (count--) 2121 el_push(e, a); 2122 return 0; 2123 } 2124 2125 void 2126 /*ARGSUSED*/ 2127 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2128 { 2129 el_set(e, EL_PREP_TERM, 1); 2130 } 2131 2132 void 2133 rl_deprep_terminal(void) 2134 { 2135 el_set(e, EL_PREP_TERM, 0); 2136 } 2137 2138 int 2139 rl_read_init_file(const char *s) 2140 { 2141 return el_source(e, s); 2142 } 2143 2144 int 2145 rl_parse_and_bind(const char *line) 2146 { 2147 const char **argv; 2148 int argc; 2149 Tokenizer *tok; 2150 2151 tok = tok_init(NULL); 2152 tok_str(tok, line, &argc, &argv); 2153 argc = el_parse(e, argc, argv); 2154 tok_end(tok); 2155 return argc ? 1 : 0; 2156 } 2157 2158 int 2159 rl_variable_bind(const char *var, const char *value) 2160 { 2161 /* 2162 * The proper return value is undocument, but this is what the 2163 * readline source seems to do. 2164 */ 2165 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2166 } 2167 2168 void 2169 rl_stuff_char(int c) 2170 { 2171 char buf[2]; 2172 2173 buf[0] = (char)c; 2174 buf[1] = '\0'; 2175 el_insertstr(e, buf); 2176 } 2177 2178 static int 2179 _rl_event_read_char(EditLine *el, wchar_t *wc) 2180 { 2181 char ch; 2182 int n; 2183 ssize_t num_read = 0; 2184 2185 ch = '\0'; 2186 *wc = L'\0'; 2187 while (rl_event_hook) { 2188 2189 (*rl_event_hook)(); 2190 2191 #if defined(FIONREAD) 2192 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2193 return -1; 2194 if (n) 2195 num_read = read(el->el_infd, &ch, (size_t)1); 2196 else 2197 num_read = 0; 2198 #elif defined(F_SETFL) && defined(O_NDELAY) 2199 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2200 return -1; 2201 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2202 return -1; 2203 num_read = read(el->el_infd, &ch, 1); 2204 if (fcntl(el->el_infd, F_SETFL, n)) 2205 return -1; 2206 #else 2207 /* not non-blocking, but what you gonna do? */ 2208 num_read = read(el->el_infd, &ch, 1); 2209 return -1; 2210 #endif 2211 2212 if (num_read < 0 && errno == EAGAIN) 2213 continue; 2214 if (num_read == 0) 2215 continue; 2216 break; 2217 } 2218 if (!rl_event_hook) 2219 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2220 *wc = (wchar_t)ch; 2221 return (int)num_read; 2222 } 2223 2224 static void 2225 _rl_update_pos(void) 2226 { 2227 const LineInfo *li = el_line(e); 2228 2229 rl_point = (int)(li->cursor - li->buffer); 2230 rl_end = (int)(li->lastchar - li->buffer); 2231 } 2232 2233 void 2234 rl_get_screen_size(int *rows, int *cols) 2235 { 2236 if (rows) 2237 el_get(e, EL_GETTC, "li", rows, (void *)0); 2238 if (cols) 2239 el_get(e, EL_GETTC, "co", cols, (void *)0); 2240 } 2241 2242 void 2243 rl_set_screen_size(int rows, int cols) 2244 { 2245 char buf[64]; 2246 (void)snprintf(buf, sizeof(buf), "%d", rows); 2247 el_set(e, EL_SETTC, "li", buf, NULL); 2248 (void)snprintf(buf, sizeof(buf), "%d", cols); 2249 el_set(e, EL_SETTC, "co", buf, NULL); 2250 } 2251 2252 char ** 2253 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2254 { 2255 size_t len, max, i, j, min; 2256 char **list, *match, *a, *b; 2257 2258 len = 1; 2259 max = 10; 2260 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2261 return NULL; 2262 2263 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2264 list[len++] = match; 2265 if (len == max) { 2266 char **nl; 2267 max += 10; 2268 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2269 goto out; 2270 list = nl; 2271 } 2272 } 2273 if (len == 1) 2274 goto out; 2275 list[len] = NULL; 2276 if (len == 2) { 2277 if ((list[0] = strdup(list[1])) == NULL) 2278 goto out; 2279 return list; 2280 } 2281 qsort(&list[1], len - 1, sizeof(*list), 2282 (int (*)(const void *, const void *)) strcmp); 2283 min = SIZE_MAX; 2284 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2285 b = list[i + 1]; 2286 for (j = 0; a[j] && a[j] == b[j]; j++) 2287 continue; 2288 if (min > j) 2289 min = j; 2290 } 2291 if (min == 0 && *str) { 2292 if ((list[0] = strdup(str)) == NULL) 2293 goto out; 2294 } else { 2295 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2296 goto out; 2297 (void)memcpy(list[0], list[1], min); 2298 list[0][min] = '\0'; 2299 } 2300 return list; 2301 2302 out: 2303 el_free(list); 2304 return NULL; 2305 } 2306 2307 char * 2308 rl_filename_completion_function (const char *text, int state) 2309 { 2310 return fn_filename_completion_function(text, state); 2311 } 2312 2313 void 2314 rl_forced_update_display(void) 2315 { 2316 el_set(e, EL_REFRESH); 2317 } 2318 2319 int 2320 _rl_abort_internal(void) 2321 { 2322 el_beep(e); 2323 longjmp(topbuf, 1); 2324 /*NOTREACHED*/ 2325 } 2326 2327 int 2328 _rl_qsort_string_compare(char **s1, char **s2) 2329 { 2330 return strcoll(*s1, *s2); 2331 } 2332 2333 HISTORY_STATE * 2334 history_get_history_state(void) 2335 { 2336 HISTORY_STATE *hs; 2337 2338 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2339 return NULL; 2340 hs->length = history_length; 2341 return hs; 2342 } 2343 2344 int 2345 /*ARGSUSED*/ 2346 rl_kill_text(int from __attribute__((__unused__)), 2347 int to __attribute__((__unused__))) 2348 { 2349 return 0; 2350 } 2351 2352 Keymap 2353 rl_make_bare_keymap(void) 2354 { 2355 return NULL; 2356 } 2357 2358 Keymap 2359 rl_get_keymap(void) 2360 { 2361 return NULL; 2362 } 2363 2364 void 2365 /*ARGSUSED*/ 2366 rl_set_keymap(Keymap k __attribute__((__unused__))) 2367 { 2368 } 2369 2370 int 2371 /*ARGSUSED*/ 2372 rl_generic_bind(int type __attribute__((__unused__)), 2373 const char * keyseq __attribute__((__unused__)), 2374 const char * data __attribute__((__unused__)), 2375 Keymap k __attribute__((__unused__))) 2376 { 2377 return 0; 2378 } 2379 2380 int 2381 /*ARGSUSED*/ 2382 rl_bind_key_in_map(int key __attribute__((__unused__)), 2383 rl_command_func_t *fun __attribute__((__unused__)), 2384 Keymap k __attribute__((__unused__))) 2385 { 2386 return 0; 2387 } 2388 2389 /* unsupported, but needed by python */ 2390 void 2391 rl_cleanup_after_signal(void) 2392 { 2393 } 2394 2395 int 2396 rl_on_new_line(void) 2397 { 2398 return 0; 2399 } 2400 2401 void 2402 rl_free_line_state(void) 2403 { 2404 } 2405 2406 int 2407 /*ARGSUSED*/ 2408 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2409 { 2410 return 0; 2411 } 2412 2413 void 2414 rl_resize_terminal(void) 2415 { 2416 el_resize(e); 2417 } 2418
Indexes created Mon Sep 22 10:09:38 GMT 2025