1 /* $NetBSD: readline.c,v 1.117 2015/06/02 15:35:31 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 1.117 2015/06/02 15:35:31 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #include <vis.h> 51 52 #include "readline/readline.h" 53 #include "el.h" 54 #include "fcns.h" /* for EL_NUM_FCNS */ 55 #include "histedit.h" 56 #include "filecomplete.h" 57 58 void rl_prep_terminal(int); 59 void rl_deprep_terminal(void); 60 61 /* for rl_complete() */ 62 #define TAB '\r' 63 64 /* see comment at the #ifdef for sense of this */ 65 /* #define GDB_411_HACK */ 66 67 /* readline compatibility stuff - look at readline sources/documentation */ 68 /* to see what these variables mean */ 69 const char *rl_library_version = "EditLine wrapper"; 70 int rl_readline_version = RL_READLINE_VERSION; 71 static char empty[] = { '\0' }; 72 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 73 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 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 max_input_history = 0; 99 char history_expansion_char = '!'; 100 char history_subst_char = '^'; 101 char *history_no_expand_chars = expand_chars; 102 Function *history_inhibit_expansion_function = NULL; 103 char *history_arg_extract(int start, int end, const char *str); 104 105 int rl_inhibit_completion = 0; 106 int rl_attempted_completion_over = 0; 107 char *rl_basic_word_break_characters = break_chars; 108 char *rl_completer_word_break_characters = NULL; 109 char *rl_completer_quote_characters = NULL; 110 rl_compentry_func_t *rl_completion_entry_function = NULL; 111 char *(*rl_completion_word_break_hook)(void) = NULL; 112 rl_completion_func_t *rl_attempted_completion_function = NULL; 113 Function *rl_pre_input_hook = NULL; 114 Function *rl_startup1_hook = NULL; 115 int (*rl_getc_function)(FILE *) = NULL; 116 char *rl_terminal_name = NULL; 117 int rl_already_prompted = 0; 118 int rl_filename_completion_desired = 0; 119 int rl_ignore_completion_duplicates = 0; 120 int readline_echoing_p = 1; 121 int _rl_print_completions_horizontally = 0; 122 VFunction *rl_redisplay_function = NULL; 123 Function *rl_startup_hook = NULL; 124 VFunction *rl_completion_display_matches_hook = NULL; 125 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 126 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 127 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 128 129 /* 130 * The current prompt string. 131 */ 132 char *rl_prompt = NULL; 133 /* 134 * This is set to character indicating type of completion being done by 135 * rl_complete_internal(); this is available for application completion 136 * functions. 137 */ 138 int rl_completion_type = 0; 139 140 /* 141 * If more than this number of items results from query for possible 142 * completions, we ask user if they are sure to really display the list. 143 */ 144 int rl_completion_query_items = 100; 145 146 /* 147 * List of characters which are word break characters, but should be left 148 * in the parsed text when it is passed to the completion function. 149 * Shell uses this to help determine what kind of completing to do. 150 */ 151 char *rl_special_prefixes = NULL; 152 153 /* 154 * This is the character appended to the completed words if at the end of 155 * the line. Default is ' ' (a space). 156 */ 157 int rl_completion_append_character = ' '; 158 159 /* stuff below is used internally by libedit for readline emulation */ 160 161 static History *h = NULL; 162 static EditLine *e = NULL; 163 static rl_command_func_t *map[256]; 164 static jmp_buf topbuf; 165 166 /* internal functions */ 167 static unsigned char _el_rl_complete(EditLine *, int); 168 static unsigned char _el_rl_tstp(EditLine *, int); 169 static char *_get_prompt(EditLine *); 170 static int _getc_function(EditLine *, char *); 171 static HIST_ENTRY *_move_history(int); 172 static int _history_expand_command(const char *, size_t, size_t, 173 char **); 174 static char *_rl_compat_sub(const char *, const char *, 175 const char *, int); 176 static int _rl_event_read_char(EditLine *, char *); 177 static void _rl_update_pos(void); 178 179 180 /* ARGSUSED */ 181 static char * 182 _get_prompt(EditLine *el __attribute__((__unused__))) 183 { 184 rl_already_prompted = 1; 185 return rl_prompt; 186 } 187 188 189 /* 190 * generic function for moving around history 191 */ 192 static HIST_ENTRY * 193 _move_history(int op) 194 { 195 HistEvent ev; 196 static HIST_ENTRY rl_he; 197 198 if (history(h, &ev, op) != 0) 199 return NULL; 200 201 rl_he.line = ev.str; 202 rl_he.data = NULL; 203 204 return &rl_he; 205 } 206 207 208 /* 209 * read one key from user defined input function 210 */ 211 static int 212 /*ARGSUSED*/ 213 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 214 { 215 int i; 216 217 i = (*rl_getc_function)(NULL); 218 if (i == -1) 219 return 0; 220 *c = (char)i; 221 return 1; 222 } 223 224 static void 225 _resize_fun(EditLine *el, void *a) 226 { 227 const LineInfo *li; 228 char **ap = a; 229 230 li = el_line(el); 231 /* a cheesy way to get rid of const cast. */ 232 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 233 } 234 235 static const char * 236 _default_history_file(void) 237 { 238 struct passwd *p; 239 static char *path; 240 size_t len; 241 242 if (path) 243 return path; 244 245 if ((p = getpwuid(getuid())) == NULL) 246 return NULL; 247 248 len = strlen(p->pw_dir) + sizeof("/.history"); 249 if ((path = malloc(len)) == NULL) 250 return NULL; 251 252 (void)snprintf(path, len, "%s/.history", p->pw_dir); 253 return path; 254 } 255 256 /* 257 * READLINE compatibility stuff 258 */ 259 260 /* 261 * Set the prompt 262 */ 263 int 264 rl_set_prompt(const char *prompt) 265 { 266 char *p; 267 268 if (!prompt) 269 prompt = ""; 270 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 271 return 0; 272 if (rl_prompt) 273 el_free(rl_prompt); 274 rl_prompt = strdup(prompt); 275 if (rl_prompt == NULL) 276 return -1; 277 278 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 279 *p = RL_PROMPT_START_IGNORE; 280 281 return 0; 282 } 283 284 /* 285 * initialize rl compat stuff 286 */ 287 int 288 rl_initialize(void) 289 { 290 HistEvent ev; 291 int editmode = 1; 292 struct termios t; 293 294 if (e != NULL) 295 el_end(e); 296 if (h != NULL) 297 history_end(h); 298 299 if (!rl_instream) 300 rl_instream = stdin; 301 if (!rl_outstream) 302 rl_outstream = stdout; 303 304 /* 305 * See if we don't really want to run the editor 306 */ 307 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 308 editmode = 0; 309 310 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 311 312 if (!editmode) 313 el_set(e, EL_EDITMODE, 0); 314 315 h = history_init(); 316 if (!e || !h) 317 return -1; 318 319 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 320 history_length = 0; 321 max_input_history = INT_MAX; 322 el_set(e, EL_HIST, history, h); 323 324 /* Setup resize function */ 325 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 326 327 /* setup getc function if valid */ 328 if (rl_getc_function) 329 el_set(e, EL_GETCFN, _getc_function); 330 331 /* for proper prompt printing in readline() */ 332 if (rl_set_prompt("") == -1) { 333 history_end(h); 334 el_end(e); 335 return -1; 336 } 337 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 338 el_set(e, EL_SIGNAL, rl_catch_signals); 339 340 /* set default mode to "emacs"-style and read setting afterwards */ 341 /* so this can be overridden */ 342 el_set(e, EL_EDITOR, "emacs"); 343 if (rl_terminal_name != NULL) 344 el_set(e, EL_TERMINAL, rl_terminal_name); 345 else 346 el_get(e, EL_TERMINAL, &rl_terminal_name); 347 348 /* 349 * Word completion - this has to go AFTER rebinding keys 350 * to emacs-style. 351 */ 352 el_set(e, EL_ADDFN, "rl_complete", 353 "ReadLine compatible completion function", 354 _el_rl_complete); 355 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 356 357 /* 358 * Send TSTP when ^Z is pressed. 359 */ 360 el_set(e, EL_ADDFN, "rl_tstp", 361 "ReadLine compatible suspend function", 362 _el_rl_tstp); 363 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 364 365 /* 366 * Set some readline compatible key-bindings. 367 */ 368 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 369 370 /* 371 * Allow the use of Home/End keys. 372 */ 373 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 374 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 375 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 376 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 377 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 378 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 379 380 /* 381 * Allow the use of the Delete/Insert keys. 382 */ 383 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 384 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 385 386 /* 387 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 388 */ 389 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 390 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 391 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 392 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 393 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 394 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 395 396 /* read settings from configuration file */ 397 el_source(e, NULL); 398 399 /* 400 * Unfortunately, some applications really do use rl_point 401 * and rl_line_buffer directly. 402 */ 403 _resize_fun(e, &rl_line_buffer); 404 _rl_update_pos(); 405 406 if (rl_startup_hook) 407 (*rl_startup_hook)(NULL, 0); 408 409 return 0; 410 } 411 412 413 /* 414 * read one line from input stream and return it, chomping 415 * trailing newline (if there is any) 416 */ 417 char * 418 readline(const char *p) 419 { 420 HistEvent ev; 421 const char * volatile prompt = p; 422 int count; 423 const char *ret; 424 char *buf; 425 static int used_event_hook; 426 427 if (e == NULL || h == NULL) 428 rl_initialize(); 429 430 rl_done = 0; 431 432 (void)setjmp(topbuf); 433 434 /* update prompt accordingly to what has been passed */ 435 if (rl_set_prompt(prompt) == -1) 436 return NULL; 437 438 if (rl_pre_input_hook) 439 (*rl_pre_input_hook)(NULL, 0); 440 441 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 442 el_set(e, EL_GETCFN, _rl_event_read_char); 443 used_event_hook = 1; 444 } 445 446 if (!rl_event_hook && used_event_hook) { 447 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 448 used_event_hook = 0; 449 } 450 451 rl_already_prompted = 0; 452 453 /* get one line from input stream */ 454 ret = el_gets(e, &count); 455 456 if (ret && count > 0) { 457 int lastidx; 458 459 buf = strdup(ret); 460 if (buf == NULL) 461 return NULL; 462 lastidx = count - 1; 463 if (buf[lastidx] == '\n') 464 buf[lastidx] = '\0'; 465 } else 466 buf = NULL; 467 468 history(h, &ev, H_GETSIZE); 469 history_length = ev.num; 470 471 return buf; 472 } 473 474 /* 475 * history functions 476 */ 477 478 /* 479 * is normally called before application starts to use 480 * history expansion functions 481 */ 482 void 483 using_history(void) 484 { 485 if (h == NULL || e == NULL) 486 rl_initialize(); 487 } 488 489 490 /* 491 * substitute ``what'' with ``with'', returning resulting string; if 492 * globally == 1, substitutes all occurrences of what, otherwise only the 493 * first one 494 */ 495 static char * 496 _rl_compat_sub(const char *str, const char *what, const char *with, 497 int globally) 498 { 499 const char *s; 500 char *r, *result; 501 size_t len, with_len, what_len; 502 503 len = strlen(str); 504 with_len = strlen(with); 505 what_len = strlen(what); 506 507 /* calculate length we need for result */ 508 s = str; 509 while (*s) { 510 if (*s == *what && !strncmp(s, what, what_len)) { 511 len += with_len - what_len; 512 if (!globally) 513 break; 514 s += what_len; 515 } else 516 s++; 517 } 518 r = result = el_malloc((len + 1) * sizeof(*r)); 519 if (result == NULL) 520 return NULL; 521 s = str; 522 while (*s) { 523 if (*s == *what && !strncmp(s, what, what_len)) { 524 (void)strncpy(r, with, with_len); 525 r += with_len; 526 s += what_len; 527 if (!globally) { 528 (void)strcpy(r, s); 529 return result; 530 } 531 } else 532 *r++ = *s++; 533 } 534 *r = '\0'; 535 return result; 536 } 537 538 static char *last_search_pat; /* last !?pat[?] search pattern */ 539 static char *last_search_match; /* last !?pat[?] that matched */ 540 541 const char * 542 get_history_event(const char *cmd, int *cindex, int qchar) 543 { 544 int idx, sign, sub, num, begin, ret; 545 size_t len; 546 char *pat; 547 const char *rptr; 548 HistEvent ev; 549 550 idx = *cindex; 551 if (cmd[idx++] != history_expansion_char) 552 return NULL; 553 554 /* find out which event to take */ 555 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 556 if (history(h, &ev, H_FIRST) != 0) 557 return NULL; 558 *cindex = cmd[idx]? (idx + 1):idx; 559 return ev.str; 560 } 561 sign = 0; 562 if (cmd[idx] == '-') { 563 sign = 1; 564 idx++; 565 } 566 567 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 568 HIST_ENTRY *rl_he; 569 570 num = 0; 571 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 572 num = num * 10 + cmd[idx] - '0'; 573 idx++; 574 } 575 if (sign) 576 num = history_length - num + 1; 577 578 if (!(rl_he = history_get(num))) 579 return NULL; 580 581 *cindex = idx; 582 return rl_he->line; 583 } 584 sub = 0; 585 if (cmd[idx] == '?') { 586 sub = 1; 587 idx++; 588 } 589 begin = idx; 590 while (cmd[idx]) { 591 if (cmd[idx] == '\n') 592 break; 593 if (sub && cmd[idx] == '?') 594 break; 595 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 596 || cmd[idx] == '\t' || cmd[idx] == qchar)) 597 break; 598 idx++; 599 } 600 len = (size_t)idx - (size_t)begin; 601 if (sub && cmd[idx] == '?') 602 idx++; 603 if (sub && len == 0 && last_search_pat && *last_search_pat) 604 pat = last_search_pat; 605 else if (len == 0) 606 return NULL; 607 else { 608 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 609 return NULL; 610 (void)strncpy(pat, cmd + begin, len); 611 pat[len] = '\0'; 612 } 613 614 if (history(h, &ev, H_CURR) != 0) { 615 if (pat != last_search_pat) 616 el_free(pat); 617 return NULL; 618 } 619 num = ev.num; 620 621 if (sub) { 622 if (pat != last_search_pat) { 623 if (last_search_pat) 624 el_free(last_search_pat); 625 last_search_pat = pat; 626 } 627 ret = history_search(pat, -1); 628 } else 629 ret = history_search_prefix(pat, -1); 630 631 if (ret == -1) { 632 /* restore to end of list on failed search */ 633 history(h, &ev, H_FIRST); 634 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 635 if (pat != last_search_pat) 636 el_free(pat); 637 return NULL; 638 } 639 640 if (sub && len) { 641 if (last_search_match && last_search_match != pat) 642 el_free(last_search_match); 643 last_search_match = pat; 644 } 645 646 if (pat != last_search_pat) 647 el_free(pat); 648 649 if (history(h, &ev, H_CURR) != 0) 650 return NULL; 651 *cindex = idx; 652 rptr = ev.str; 653 654 /* roll back to original position */ 655 (void)history(h, &ev, H_SET, num); 656 657 return rptr; 658 } 659 660 /* 661 * the real function doing history expansion - takes as argument command 662 * to do and data upon which the command should be executed 663 * does expansion the way I've understood readline documentation 664 * 665 * returns 0 if data was not modified, 1 if it was and 2 if the string 666 * should be only printed and not executed; in case of error, 667 * returns -1 and *result points to NULL 668 * it's the caller's responsibility to free() the string returned in *result 669 */ 670 static int 671 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 672 char **result) 673 { 674 char *tmp, *search = NULL, *aptr; 675 const char *ptr, *cmd; 676 static char *from = NULL, *to = NULL; 677 int start, end, idx, has_mods = 0; 678 int p_on = 0, g_on = 0; 679 680 *result = NULL; 681 aptr = NULL; 682 ptr = NULL; 683 684 /* First get event specifier */ 685 idx = 0; 686 687 if (strchr(":^*$", command[offs + 1])) { 688 char str[4]; 689 /* 690 * "!:" is shorthand for "!!:". 691 * "!^", "!*" and "!$" are shorthand for 692 * "!!:^", "!!:*" and "!!:$" respectively. 693 */ 694 str[0] = str[1] = '!'; 695 str[2] = '0'; 696 ptr = get_history_event(str, &idx, 0); 697 idx = (command[offs + 1] == ':')? 1:0; 698 has_mods = 1; 699 } else { 700 if (command[offs + 1] == '#') { 701 /* use command so far */ 702 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 703 == NULL) 704 return -1; 705 (void)strncpy(aptr, command, offs); 706 aptr[offs] = '\0'; 707 idx = 1; 708 } else { 709 int qchar; 710 711 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 712 ptr = get_history_event(command + offs, &idx, qchar); 713 } 714 has_mods = command[offs + (size_t)idx] == ':'; 715 } 716 717 if (ptr == NULL && aptr == NULL) 718 return -1; 719 720 if (!has_mods) { 721 *result = strdup(aptr ? aptr : ptr); 722 if (aptr) 723 el_free(aptr); 724 if (*result == NULL) 725 return -1; 726 return 1; 727 } 728 729 cmd = command + offs + idx + 1; 730 731 /* Now parse any word designators */ 732 733 if (*cmd == '%') /* last word matched by ?pat? */ 734 tmp = strdup(last_search_match? last_search_match:""); 735 else if (strchr("^*$-0123456789", *cmd)) { 736 start = end = -1; 737 if (*cmd == '^') 738 start = end = 1, cmd++; 739 else if (*cmd == '$') 740 start = -1, cmd++; 741 else if (*cmd == '*') 742 start = 1, cmd++; 743 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 744 start = 0; 745 while (*cmd && '0' <= *cmd && *cmd <= '9') 746 start = start * 10 + *cmd++ - '0'; 747 748 if (*cmd == '-') { 749 if (isdigit((unsigned char) cmd[1])) { 750 cmd++; 751 end = 0; 752 while (*cmd && '0' <= *cmd && *cmd <= '9') 753 end = end * 10 + *cmd++ - '0'; 754 } else if (cmd[1] == '$') { 755 cmd += 2; 756 end = -1; 757 } else { 758 cmd++; 759 end = -2; 760 } 761 } else if (*cmd == '*') 762 end = -1, cmd++; 763 else 764 end = start; 765 } 766 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 767 if (tmp == NULL) { 768 (void)fprintf(rl_outstream, "%s: Bad word specifier", 769 command + offs + idx); 770 if (aptr) 771 el_free(aptr); 772 return -1; 773 } 774 } else 775 tmp = strdup(aptr? aptr:ptr); 776 777 if (aptr) 778 el_free(aptr); 779 780 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 781 *result = tmp; 782 return 1; 783 } 784 785 for (; *cmd; cmd++) { 786 if (*cmd == ':') 787 continue; 788 else if (*cmd == 'h') { /* remove trailing path */ 789 if ((aptr = strrchr(tmp, '/')) != NULL) 790 *aptr = '\0'; 791 } else if (*cmd == 't') { /* remove leading path */ 792 if ((aptr = strrchr(tmp, '/')) != NULL) { 793 aptr = strdup(aptr + 1); 794 el_free(tmp); 795 tmp = aptr; 796 } 797 } else if (*cmd == 'r') { /* remove trailing suffix */ 798 if ((aptr = strrchr(tmp, '.')) != NULL) 799 *aptr = '\0'; 800 } else if (*cmd == 'e') { /* remove all but suffix */ 801 if ((aptr = strrchr(tmp, '.')) != NULL) { 802 aptr = strdup(aptr); 803 el_free(tmp); 804 tmp = aptr; 805 } 806 } else if (*cmd == 'p') /* print only */ 807 p_on = 1; 808 else if (*cmd == 'g') 809 g_on = 2; 810 else if (*cmd == 's' || *cmd == '&') { 811 char *what, *with, delim; 812 size_t len, from_len; 813 size_t size; 814 815 if (*cmd == '&' && (from == NULL || to == NULL)) 816 continue; 817 else if (*cmd == 's') { 818 delim = *(++cmd), cmd++; 819 size = 16; 820 what = el_realloc(from, size * sizeof(*what)); 821 if (what == NULL) { 822 el_free(from); 823 el_free(tmp); 824 return 0; 825 } 826 len = 0; 827 for (; *cmd && *cmd != delim; cmd++) { 828 if (*cmd == '\\' && cmd[1] == delim) 829 cmd++; 830 if (len >= size) { 831 char *nwhat; 832 nwhat = el_realloc(what, 833 (size <<= 1) * 834 sizeof(*nwhat)); 835 if (nwhat == NULL) { 836 el_free(what); 837 el_free(tmp); 838 return 0; 839 } 840 what = nwhat; 841 } 842 what[len++] = *cmd; 843 } 844 what[len] = '\0'; 845 from = what; 846 if (*what == '\0') { 847 el_free(what); 848 if (search) { 849 from = strdup(search); 850 if (from == NULL) { 851 el_free(tmp); 852 return 0; 853 } 854 } else { 855 from = NULL; 856 el_free(tmp); 857 return -1; 858 } 859 } 860 cmd++; /* shift after delim */ 861 if (!*cmd) 862 continue; 863 864 size = 16; 865 with = el_realloc(to, size * sizeof(*with)); 866 if (with == NULL) { 867 el_free(to); 868 el_free(tmp); 869 return -1; 870 } 871 len = 0; 872 from_len = strlen(from); 873 for (; *cmd && *cmd != delim; cmd++) { 874 if (len + from_len + 1 >= size) { 875 char *nwith; 876 size += from_len + 1; 877 nwith = el_realloc(with, 878 size * sizeof(*nwith)); 879 if (nwith == NULL) { 880 el_free(with); 881 el_free(tmp); 882 return -1; 883 } 884 with = nwith; 885 } 886 if (*cmd == '&') { 887 /* safe */ 888 (void)strcpy(&with[len], from); 889 len += from_len; 890 continue; 891 } 892 if (*cmd == '\\' 893 && (*(cmd + 1) == delim 894 || *(cmd + 1) == '&')) 895 cmd++; 896 with[len++] = *cmd; 897 } 898 with[len] = '\0'; 899 to = with; 900 } 901 902 aptr = _rl_compat_sub(tmp, from, to, g_on); 903 if (aptr) { 904 el_free(tmp); 905 tmp = aptr; 906 } 907 g_on = 0; 908 } 909 } 910 *result = tmp; 911 return p_on? 2:1; 912 } 913 914 915 /* 916 * csh-style history expansion 917 */ 918 int 919 history_expand(char *str, char **output) 920 { 921 int ret = 0; 922 size_t idx, i, size; 923 char *tmp, *result; 924 925 if (h == NULL || e == NULL) 926 rl_initialize(); 927 928 if (history_expansion_char == 0) { 929 *output = strdup(str); 930 return 0; 931 } 932 933 *output = NULL; 934 if (str[0] == history_subst_char) { 935 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 936 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 937 if (*output == NULL) 938 return 0; 939 (*output)[0] = (*output)[1] = history_expansion_char; 940 (*output)[2] = ':'; 941 (*output)[3] = 's'; 942 (void)strcpy((*output) + 4, str); 943 str = *output; 944 } else { 945 *output = strdup(str); 946 if (*output == NULL) 947 return 0; 948 } 949 950 #define ADD_STRING(what, len, fr) \ 951 { \ 952 if (idx + len + 1 > size) { \ 953 char *nresult = el_realloc(result, \ 954 (size += len + 1) * sizeof(*nresult)); \ 955 if (nresult == NULL) { \ 956 el_free(*output); \ 957 if (/*CONSTCOND*/fr) \ 958 el_free(tmp); \ 959 return 0; \ 960 } \ 961 result = nresult; \ 962 } \ 963 (void)strncpy(&result[idx], what, len); \ 964 idx += len; \ 965 result[idx] = '\0'; \ 966 } 967 968 result = NULL; 969 size = idx = 0; 970 tmp = NULL; 971 for (i = 0; str[i];) { 972 int qchar, loop_again; 973 size_t len, start, j; 974 975 qchar = 0; 976 loop_again = 1; 977 start = j = i; 978 loop: 979 for (; str[j]; j++) { 980 if (str[j] == '\\' && 981 str[j + 1] == history_expansion_char) { 982 len = strlen(&str[j + 1]) + 1; 983 memmove(&str[j], &str[j + 1], len); 984 continue; 985 } 986 if (!loop_again) { 987 if (isspace((unsigned char) str[j]) 988 || str[j] == qchar) 989 break; 990 } 991 if (str[j] == history_expansion_char 992 && !strchr(history_no_expand_chars, str[j + 1]) 993 && (!history_inhibit_expansion_function || 994 (*history_inhibit_expansion_function)(str, 995 (int)j) == 0)) 996 break; 997 } 998 999 if (str[j] && loop_again) { 1000 i = j; 1001 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1002 j++; 1003 if (str[j] == history_expansion_char) 1004 j++; 1005 loop_again = 0; 1006 goto loop; 1007 } 1008 len = i - start; 1009 ADD_STRING(&str[start], len, 0); 1010 1011 if (str[i] == '\0' || str[i] != history_expansion_char) { 1012 len = j - i; 1013 ADD_STRING(&str[i], len, 0); 1014 if (start == 0) 1015 ret = 0; 1016 else 1017 ret = 1; 1018 break; 1019 } 1020 ret = _history_expand_command (str, i, (j - i), &tmp); 1021 if (ret > 0 && tmp) { 1022 len = strlen(tmp); 1023 ADD_STRING(tmp, len, 1); 1024 } 1025 if (tmp) { 1026 el_free(tmp); 1027 tmp = NULL; 1028 } 1029 i = j; 1030 } 1031 1032 /* ret is 2 for "print only" option */ 1033 if (ret == 2) { 1034 add_history(result); 1035 #ifdef GDB_411_HACK 1036 /* gdb 4.11 has been shipped with readline, where */ 1037 /* history_expand() returned -1 when the line */ 1038 /* should not be executed; in readline 2.1+ */ 1039 /* it should return 2 in such a case */ 1040 ret = -1; 1041 #endif 1042 } 1043 el_free(*output); 1044 *output = result; 1045 1046 return ret; 1047 } 1048 1049 /* 1050 * Return a string consisting of arguments of "str" from "start" to "end". 1051 */ 1052 char * 1053 history_arg_extract(int start, int end, const char *str) 1054 { 1055 size_t i, len, max; 1056 char **arr, *result = NULL; 1057 1058 arr = history_tokenize(str); 1059 if (!arr) 1060 return NULL; 1061 if (arr && *arr == NULL) 1062 goto out; 1063 1064 for (max = 0; arr[max]; max++) 1065 continue; 1066 max--; 1067 1068 if (start == '$') 1069 start = (int)max; 1070 if (end == '$') 1071 end = (int)max; 1072 if (end < 0) 1073 end = (int)max + end + 1; 1074 if (start < 0) 1075 start = end; 1076 1077 if (start < 0 || end < 0 || (size_t)start > max || 1078 (size_t)end > max || start > end) 1079 goto out; 1080 1081 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1082 len += strlen(arr[i]) + 1; 1083 len++; 1084 result = el_malloc(len * sizeof(*result)); 1085 if (result == NULL) 1086 goto out; 1087 1088 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1089 (void)strcpy(result + len, arr[i]); 1090 len += strlen(arr[i]); 1091 if (i < (size_t)end) 1092 result[len++] = ' '; 1093 } 1094 result[len] = '\0'; 1095 1096 out: 1097 for (i = 0; arr[i]; i++) 1098 el_free(arr[i]); 1099 el_free(arr); 1100 1101 return result; 1102 } 1103 1104 /* 1105 * Parse the string into individual tokens, 1106 * similar to how shell would do it. 1107 */ 1108 char ** 1109 history_tokenize(const char *str) 1110 { 1111 int size = 1, idx = 0, i, start; 1112 size_t len; 1113 char **result = NULL, *temp, delim = '\0'; 1114 1115 for (i = 0; str[i];) { 1116 while (isspace((unsigned char) str[i])) 1117 i++; 1118 start = i; 1119 for (; str[i];) { 1120 if (str[i] == '\\') { 1121 if (str[i+1] != '\0') 1122 i++; 1123 } else if (str[i] == delim) 1124 delim = '\0'; 1125 else if (!delim && 1126 (isspace((unsigned char) str[i]) || 1127 strchr("()<>;&|$", str[i]))) 1128 break; 1129 else if (!delim && strchr("'`\"", str[i])) 1130 delim = str[i]; 1131 if (str[i]) 1132 i++; 1133 } 1134 1135 if (idx + 2 >= size) { 1136 char **nresult; 1137 size <<= 1; 1138 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1139 if (nresult == NULL) { 1140 el_free(result); 1141 return NULL; 1142 } 1143 result = nresult; 1144 } 1145 len = (size_t)i - (size_t)start; 1146 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1147 if (temp == NULL) { 1148 for (i = 0; i < idx; i++) 1149 el_free(result[i]); 1150 el_free(result); 1151 return NULL; 1152 } 1153 (void)strncpy(temp, &str[start], len); 1154 temp[len] = '\0'; 1155 result[idx++] = temp; 1156 result[idx] = NULL; 1157 if (str[i]) 1158 i++; 1159 } 1160 return result; 1161 } 1162 1163 1164 /* 1165 * limit size of history record to ``max'' events 1166 */ 1167 void 1168 stifle_history(int max) 1169 { 1170 HistEvent ev; 1171 1172 if (h == NULL || e == NULL) 1173 rl_initialize(); 1174 1175 if (history(h, &ev, H_SETSIZE, max) == 0) 1176 max_input_history = max; 1177 } 1178 1179 1180 /* 1181 * "unlimit" size of history - set the limit to maximum allowed int value 1182 */ 1183 int 1184 unstifle_history(void) 1185 { 1186 HistEvent ev; 1187 int omax; 1188 1189 history(h, &ev, H_SETSIZE, INT_MAX); 1190 omax = max_input_history; 1191 max_input_history = INT_MAX; 1192 return omax; /* some value _must_ be returned */ 1193 } 1194 1195 1196 int 1197 history_is_stifled(void) 1198 { 1199 1200 /* cannot return true answer */ 1201 return max_input_history != INT_MAX; 1202 } 1203 1204 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1205 1206 int 1207 history_truncate_file (const char *filename, int nlines) 1208 { 1209 int ret = 0; 1210 FILE *fp, *tp; 1211 char template[sizeof(_history_tmp_template)]; 1212 char buf[4096]; 1213 int fd; 1214 char *cp; 1215 off_t off; 1216 int count = 0; 1217 ssize_t left = 0; 1218 1219 if (filename == NULL && (filename = _default_history_file()) == NULL) 1220 return errno; 1221 if ((fp = fopen(filename, "r+")) == NULL) 1222 return errno; 1223 strcpy(template, _history_tmp_template); 1224 if ((fd = mkstemp(template)) == -1) { 1225 ret = errno; 1226 goto out1; 1227 } 1228 1229 if ((tp = fdopen(fd, "r+")) == NULL) { 1230 close(fd); 1231 ret = errno; 1232 goto out2; 1233 } 1234 1235 for(;;) { 1236 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1237 if (ferror(fp)) { 1238 ret = errno; 1239 break; 1240 } 1241 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1242 (off_t)-1) { 1243 ret = errno; 1244 break; 1245 } 1246 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1247 if (ferror(fp)) { 1248 ret = errno; 1249 break; 1250 } 1251 if (left == 0) { 1252 count--; 1253 left = sizeof(buf); 1254 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1255 != 1) { 1256 ret = errno; 1257 break; 1258 } 1259 fflush(tp); 1260 break; 1261 } 1262 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1263 ret = errno; 1264 break; 1265 } 1266 count++; 1267 } 1268 if (ret) 1269 goto out3; 1270 cp = buf + left - 1; 1271 if(*cp != '\n') 1272 cp++; 1273 for(;;) { 1274 while (--cp >= buf) { 1275 if (*cp == '\n') { 1276 if (--nlines == 0) { 1277 if (++cp >= buf + sizeof(buf)) { 1278 count++; 1279 cp = buf; 1280 } 1281 break; 1282 } 1283 } 1284 } 1285 if (nlines <= 0 || count == 0) 1286 break; 1287 count--; 1288 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1289 ret = errno; 1290 break; 1291 } 1292 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1293 if (ferror(tp)) { 1294 ret = errno; 1295 break; 1296 } 1297 ret = EAGAIN; 1298 break; 1299 } 1300 cp = buf + sizeof(buf); 1301 } 1302 1303 if (ret || nlines > 0) 1304 goto out3; 1305 1306 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1307 ret = errno; 1308 goto out3; 1309 } 1310 1311 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1312 (off_t)-1) { 1313 ret = errno; 1314 goto out3; 1315 } 1316 1317 for(;;) { 1318 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1319 if (ferror(fp)) 1320 ret = errno; 1321 break; 1322 } 1323 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1324 ret = errno; 1325 break; 1326 } 1327 } 1328 fflush(fp); 1329 if((off = ftello(fp)) > 0) 1330 (void)ftruncate(fileno(fp), off); 1331 out3: 1332 fclose(tp); 1333 out2: 1334 unlink(template); 1335 out1: 1336 fclose(fp); 1337 1338 return ret; 1339 } 1340 1341 1342 /* 1343 * read history from a file given 1344 */ 1345 int 1346 read_history(const char *filename) 1347 { 1348 HistEvent ev; 1349 1350 if (h == NULL || e == NULL) 1351 rl_initialize(); 1352 if (filename == NULL && (filename = _default_history_file()) == NULL) 1353 return errno; 1354 return history(h, &ev, H_LOAD, filename) == -1 ? 1355 (errno ? errno : EINVAL) : 0; 1356 } 1357 1358 1359 /* 1360 * write history to a file given 1361 */ 1362 int 1363 write_history(const char *filename) 1364 { 1365 HistEvent ev; 1366 1367 if (h == NULL || e == NULL) 1368 rl_initialize(); 1369 if (filename == NULL && (filename = _default_history_file()) == NULL) 1370 return errno; 1371 return history(h, &ev, H_SAVE, filename) == -1 ? 1372 (errno ? errno : EINVAL) : 0; 1373 } 1374 1375 1376 /* 1377 * returns history ``num''th event 1378 * 1379 * returned pointer points to static variable 1380 */ 1381 HIST_ENTRY * 1382 history_get(int num) 1383 { 1384 static HIST_ENTRY she; 1385 HistEvent ev; 1386 int curr_num; 1387 1388 if (h == NULL || e == NULL) 1389 rl_initialize(); 1390 1391 /* save current position */ 1392 if (history(h, &ev, H_CURR) != 0) 1393 return NULL; 1394 curr_num = ev.num; 1395 1396 /* start from the oldest */ 1397 if (history(h, &ev, H_LAST) != 0) 1398 return NULL; /* error */ 1399 1400 /* look forwards for event matching specified offset */ 1401 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1402 return NULL; 1403 1404 she.line = ev.str; 1405 1406 /* restore pointer to where it was */ 1407 (void)history(h, &ev, H_SET, curr_num); 1408 1409 return &she; 1410 } 1411 1412 1413 /* 1414 * add the line to history table 1415 */ 1416 int 1417 add_history(const char *line) 1418 { 1419 HistEvent ev; 1420 1421 if (line == NULL) 1422 return 0; 1423 1424 if (h == NULL || e == NULL) 1425 rl_initialize(); 1426 1427 (void)history(h, &ev, H_ENTER, line); 1428 if (history(h, &ev, H_GETSIZE) == 0) 1429 history_length = ev.num; 1430 1431 return !(history_length > 0); /* return 0 if all is okay */ 1432 } 1433 1434 1435 /* 1436 * remove the specified entry from the history list and return it. 1437 */ 1438 HIST_ENTRY * 1439 remove_history(int num) 1440 { 1441 HIST_ENTRY *he; 1442 HistEvent ev; 1443 1444 if (h == NULL || e == NULL) 1445 rl_initialize(); 1446 1447 if ((he = el_malloc(sizeof(*he))) == NULL) 1448 return NULL; 1449 1450 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1451 el_free(he); 1452 return NULL; 1453 } 1454 1455 he->line = ev.str; 1456 if (history(h, &ev, H_GETSIZE) == 0) 1457 history_length = ev.num; 1458 1459 return he; 1460 } 1461 1462 1463 /* 1464 * replace the line and data of the num-th entry 1465 */ 1466 HIST_ENTRY * 1467 replace_history_entry(int num, const char *line, histdata_t data) 1468 { 1469 HIST_ENTRY *he; 1470 HistEvent ev; 1471 int curr_num; 1472 1473 if (h == NULL || e == NULL) 1474 rl_initialize(); 1475 1476 /* save current position */ 1477 if (history(h, &ev, H_CURR) != 0) 1478 return NULL; 1479 curr_num = ev.num; 1480 1481 /* start from the oldest */ 1482 if (history(h, &ev, H_LAST) != 0) 1483 return NULL; /* error */ 1484 1485 if ((he = el_malloc(sizeof(*he))) == NULL) 1486 return NULL; 1487 1488 /* look forwards for event matching specified offset */ 1489 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1490 goto out; 1491 1492 he->line = strdup(ev.str); 1493 if (he->line == NULL) 1494 goto out; 1495 1496 if (history(h, &ev, H_REPLACE, line, data)) 1497 goto out; 1498 1499 /* restore pointer to where it was */ 1500 if (history(h, &ev, H_SET, curr_num)) 1501 goto out; 1502 1503 return he; 1504 out: 1505 el_free(he); 1506 return NULL; 1507 } 1508 1509 /* 1510 * clear the history list - delete all entries 1511 */ 1512 void 1513 clear_history(void) 1514 { 1515 HistEvent ev; 1516 1517 if (h == NULL || e == NULL) 1518 rl_initialize(); 1519 1520 (void)history(h, &ev, H_CLEAR); 1521 history_length = 0; 1522 } 1523 1524 1525 /* 1526 * returns offset of the current history event 1527 */ 1528 int 1529 where_history(void) 1530 { 1531 HistEvent ev; 1532 int curr_num, off; 1533 1534 if (history(h, &ev, H_CURR) != 0) 1535 return 0; 1536 curr_num = ev.num; 1537 1538 (void)history(h, &ev, H_FIRST); 1539 off = 1; 1540 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1541 off++; 1542 1543 return off; 1544 } 1545 1546 1547 /* 1548 * returns current history event or NULL if there is no such event 1549 */ 1550 HIST_ENTRY * 1551 current_history(void) 1552 { 1553 1554 return _move_history(H_CURR); 1555 } 1556 1557 1558 /* 1559 * returns total number of bytes history events' data are using 1560 */ 1561 int 1562 history_total_bytes(void) 1563 { 1564 HistEvent ev; 1565 int curr_num; 1566 size_t size; 1567 1568 if (history(h, &ev, H_CURR) != 0) 1569 return -1; 1570 curr_num = ev.num; 1571 1572 (void)history(h, &ev, H_FIRST); 1573 size = 0; 1574 do 1575 size += strlen(ev.str) * sizeof(*ev.str); 1576 while (history(h, &ev, H_NEXT) == 0); 1577 1578 /* get to the same position as before */ 1579 history(h, &ev, H_PREV_EVENT, curr_num); 1580 1581 return (int)size; 1582 } 1583 1584 1585 /* 1586 * sets the position in the history list to ``pos'' 1587 */ 1588 int 1589 history_set_pos(int pos) 1590 { 1591 HistEvent ev; 1592 int curr_num; 1593 1594 if (pos >= history_length || pos < 0) 1595 return -1; 1596 1597 (void)history(h, &ev, H_CURR); 1598 curr_num = ev.num; 1599 1600 /* 1601 * use H_DELDATA to set to nth history (without delete) by passing 1602 * (void **)-1 1603 */ 1604 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1605 (void)history(h, &ev, H_SET, curr_num); 1606 return -1; 1607 } 1608 return 0; 1609 } 1610 1611 1612 /* 1613 * returns previous event in history and shifts pointer accordingly 1614 */ 1615 HIST_ENTRY * 1616 previous_history(void) 1617 { 1618 1619 return _move_history(H_PREV); 1620 } 1621 1622 1623 /* 1624 * returns next event in history and shifts pointer accordingly 1625 */ 1626 HIST_ENTRY * 1627 next_history(void) 1628 { 1629 1630 return _move_history(H_NEXT); 1631 } 1632 1633 1634 /* 1635 * searches for first history event containing the str 1636 */ 1637 int 1638 history_search(const char *str, int direction) 1639 { 1640 HistEvent ev; 1641 const char *strp; 1642 int curr_num; 1643 1644 if (history(h, &ev, H_CURR) != 0) 1645 return -1; 1646 curr_num = ev.num; 1647 1648 for (;;) { 1649 if ((strp = strstr(ev.str, str)) != NULL) 1650 return (int)(strp - ev.str); 1651 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1652 break; 1653 } 1654 (void)history(h, &ev, H_SET, curr_num); 1655 return -1; 1656 } 1657 1658 1659 /* 1660 * searches for first history event beginning with str 1661 */ 1662 int 1663 history_search_prefix(const char *str, int direction) 1664 { 1665 HistEvent ev; 1666 1667 return (history(h, &ev, direction < 0 ? 1668 H_PREV_STR : H_NEXT_STR, str)); 1669 } 1670 1671 1672 /* 1673 * search for event in history containing str, starting at offset 1674 * abs(pos); continue backward, if pos<0, forward otherwise 1675 */ 1676 /* ARGSUSED */ 1677 int 1678 history_search_pos(const char *str, 1679 int direction __attribute__((__unused__)), int pos) 1680 { 1681 HistEvent ev; 1682 int curr_num, off; 1683 1684 off = (pos > 0) ? pos : -pos; 1685 pos = (pos > 0) ? 1 : -1; 1686 1687 if (history(h, &ev, H_CURR) != 0) 1688 return -1; 1689 curr_num = ev.num; 1690 1691 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1692 return -1; 1693 1694 for (;;) { 1695 if (strstr(ev.str, str)) 1696 return off; 1697 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1698 break; 1699 } 1700 1701 /* set "current" pointer back to previous state */ 1702 (void)history(h, &ev, 1703 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1704 1705 return -1; 1706 } 1707 1708 1709 /********************************/ 1710 /* completion functions */ 1711 1712 char * 1713 tilde_expand(char *name) 1714 { 1715 return fn_tilde_expand(name); 1716 } 1717 1718 char * 1719 filename_completion_function(const char *name, int state) 1720 { 1721 return fn_filename_completion_function(name, state); 1722 } 1723 1724 /* 1725 * a completion generator for usernames; returns _first_ username 1726 * which starts with supplied text 1727 * text contains a partial username preceded by random character 1728 * (usually '~'); state resets search from start (??? should we do that anyway) 1729 * it's the caller's responsibility to free the returned value 1730 */ 1731 char * 1732 username_completion_function(const char *text, int state) 1733 { 1734 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1735 struct passwd pwres; 1736 char pwbuf[1024]; 1737 #endif 1738 struct passwd *pass = NULL; 1739 1740 if (text[0] == '\0') 1741 return NULL; 1742 1743 if (*text == '~') 1744 text++; 1745 1746 if (state == 0) 1747 setpwent(); 1748 1749 while ( 1750 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1751 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1752 #else 1753 (pass = getpwent()) != NULL 1754 #endif 1755 && text[0] == pass->pw_name[0] 1756 && strcmp(text, pass->pw_name) == 0) 1757 continue; 1758 1759 if (pass == NULL) { 1760 endpwent(); 1761 return NULL; 1762 } 1763 return strdup(pass->pw_name); 1764 } 1765 1766 1767 /* 1768 * el-compatible wrapper to send TSTP on ^Z 1769 */ 1770 /* ARGSUSED */ 1771 static unsigned char 1772 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1773 { 1774 (void)kill(0, SIGTSTP); 1775 return CC_NORM; 1776 } 1777 1778 /* 1779 * Display list of strings in columnar format on readline's output stream. 1780 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1781 * 'max' is maximum length of string in 'matches'. 1782 */ 1783 void 1784 rl_display_match_list(char **matches, int len, int max) 1785 { 1786 1787 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1788 } 1789 1790 static const char * 1791 /*ARGSUSED*/ 1792 _rl_completion_append_character_function(const char *dummy 1793 __attribute__((__unused__))) 1794 { 1795 static char buf[2]; 1796 buf[0] = (char)rl_completion_append_character; 1797 buf[1] = '\0'; 1798 return buf; 1799 } 1800 1801 1802 /* 1803 * complete word at current point 1804 */ 1805 /* ARGSUSED */ 1806 int 1807 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1808 { 1809 #ifdef WIDECHAR 1810 static ct_buffer_t wbreak_conv, sprefix_conv; 1811 #endif 1812 char *breakchars; 1813 1814 if (h == NULL || e == NULL) 1815 rl_initialize(); 1816 1817 if (rl_inhibit_completion) { 1818 char arr[2]; 1819 arr[0] = (char)invoking_key; 1820 arr[1] = '\0'; 1821 el_insertstr(e, arr); 1822 return CC_REFRESH; 1823 } 1824 1825 if (rl_completion_word_break_hook != NULL) 1826 breakchars = (*rl_completion_word_break_hook)(); 1827 else 1828 breakchars = rl_basic_word_break_characters; 1829 1830 _rl_update_pos(); 1831 1832 /* Just look at how many global variables modify this operation! */ 1833 return fn_complete(e, 1834 (rl_compentry_func_t *)rl_completion_entry_function, 1835 rl_attempted_completion_function, 1836 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1837 ct_decode_string(breakchars, &sprefix_conv), 1838 _rl_completion_append_character_function, 1839 (size_t)rl_completion_query_items, 1840 &rl_completion_type, &rl_attempted_completion_over, 1841 &rl_point, &rl_end); 1842 1843 1844 } 1845 1846 1847 /* ARGSUSED */ 1848 static unsigned char 1849 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1850 { 1851 return (unsigned char)rl_complete(0, ch); 1852 } 1853 1854 /* 1855 * misc other functions 1856 */ 1857 1858 /* 1859 * bind key c to readline-type function func 1860 */ 1861 int 1862 rl_bind_key(int c, rl_command_func_t *func) 1863 { 1864 int retval = -1; 1865 1866 if (h == NULL || e == NULL) 1867 rl_initialize(); 1868 1869 if (func == rl_insert) { 1870 /* XXX notice there is no range checking of ``c'' */ 1871 e->el_map.key[c] = ED_INSERT; 1872 retval = 0; 1873 } 1874 return retval; 1875 } 1876 1877 1878 /* 1879 * read one key from input - handles chars pushed back 1880 * to input stream also 1881 */ 1882 int 1883 rl_read_key(void) 1884 { 1885 char fooarr[2 * sizeof(int)]; 1886 1887 if (e == NULL || h == NULL) 1888 rl_initialize(); 1889 1890 return el_getc(e, fooarr); 1891 } 1892 1893 1894 /* 1895 * reset the terminal 1896 */ 1897 /* ARGSUSED */ 1898 void 1899 rl_reset_terminal(const char *p __attribute__((__unused__))) 1900 { 1901 1902 if (h == NULL || e == NULL) 1903 rl_initialize(); 1904 el_reset(e); 1905 } 1906 1907 1908 /* 1909 * insert character ``c'' back into input stream, ``count'' times 1910 */ 1911 int 1912 rl_insert(int count, int c) 1913 { 1914 char arr[2]; 1915 1916 if (h == NULL || e == NULL) 1917 rl_initialize(); 1918 1919 /* XXX - int -> char conversion can lose on multichars */ 1920 arr[0] = (char)c; 1921 arr[1] = '\0'; 1922 1923 for (; count > 0; count--) 1924 el_push(e, arr); 1925 1926 return 0; 1927 } 1928 1929 int 1930 rl_insert_text(const char *text) 1931 { 1932 if (!text || *text == 0) 1933 return 0; 1934 1935 if (h == NULL || e == NULL) 1936 rl_initialize(); 1937 1938 if (el_insertstr(e, text) < 0) 1939 return 0; 1940 return (int)strlen(text); 1941 } 1942 1943 /*ARGSUSED*/ 1944 int 1945 rl_newline(int count __attribute__((__unused__)), 1946 int c __attribute__((__unused__))) 1947 { 1948 /* 1949 * Readline-4.0 appears to ignore the args. 1950 */ 1951 return rl_insert(1, '\n'); 1952 } 1953 1954 /*ARGSUSED*/ 1955 static unsigned char 1956 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1957 { 1958 if (map[c] == NULL) 1959 return CC_ERROR; 1960 1961 _rl_update_pos(); 1962 1963 (*map[c])(1, c); 1964 1965 /* If rl_done was set by the above call, deal with it here */ 1966 if (rl_done) 1967 return CC_EOF; 1968 1969 return CC_NORM; 1970 } 1971 1972 int 1973 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 1974 { 1975 char dest[8]; 1976 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1977 return -1; 1978 map[(unsigned char)c] = fun; 1979 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1980 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1981 el_set(e, EL_BIND, dest, name, NULL); 1982 return 0; 1983 } 1984 1985 void 1986 rl_callback_read_char(void) 1987 { 1988 int count = 0, done = 0; 1989 const char *buf = el_gets(e, &count); 1990 char *wbuf; 1991 1992 if (buf == NULL || count-- <= 0) 1993 return; 1994 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1995 done = 1; 1996 if (buf[count] == '\n' || buf[count] == '\r') 1997 done = 2; 1998 1999 if (done && rl_linefunc != NULL) { 2000 el_set(e, EL_UNBUFFERED, 0); 2001 if (done == 2) { 2002 if ((wbuf = strdup(buf)) != NULL) 2003 wbuf[count] = '\0'; 2004 } else 2005 wbuf = NULL; 2006 (*(void (*)(const char *))rl_linefunc)(wbuf); 2007 el_set(e, EL_UNBUFFERED, 1); 2008 } 2009 } 2010 2011 void 2012 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2013 { 2014 if (e == NULL) { 2015 rl_initialize(); 2016 } 2017 (void)rl_set_prompt(prompt); 2018 rl_linefunc = linefunc; 2019 el_set(e, EL_UNBUFFERED, 1); 2020 } 2021 2022 void 2023 rl_callback_handler_remove(void) 2024 { 2025 el_set(e, EL_UNBUFFERED, 0); 2026 rl_linefunc = NULL; 2027 } 2028 2029 void 2030 rl_redisplay(void) 2031 { 2032 char a[2]; 2033 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2034 a[1] = '\0'; 2035 el_push(e, a); 2036 } 2037 2038 int 2039 rl_get_previous_history(int count, int key) 2040 { 2041 char a[2]; 2042 a[0] = (char)key; 2043 a[1] = '\0'; 2044 while (count--) 2045 el_push(e, a); 2046 return 0; 2047 } 2048 2049 void 2050 /*ARGSUSED*/ 2051 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2052 { 2053 el_set(e, EL_PREP_TERM, 1); 2054 } 2055 2056 void 2057 rl_deprep_terminal(void) 2058 { 2059 el_set(e, EL_PREP_TERM, 0); 2060 } 2061 2062 int 2063 rl_read_init_file(const char *s) 2064 { 2065 return el_source(e, s); 2066 } 2067 2068 int 2069 rl_parse_and_bind(const char *line) 2070 { 2071 const char **argv; 2072 int argc; 2073 Tokenizer *tok; 2074 2075 tok = tok_init(NULL); 2076 tok_str(tok, line, &argc, &argv); 2077 argc = el_parse(e, argc, argv); 2078 tok_end(tok); 2079 return argc ? 1 : 0; 2080 } 2081 2082 int 2083 rl_variable_bind(const char *var, const char *value) 2084 { 2085 /* 2086 * The proper return value is undocument, but this is what the 2087 * readline source seems to do. 2088 */ 2089 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2090 } 2091 2092 void 2093 rl_stuff_char(int c) 2094 { 2095 char buf[2]; 2096 2097 buf[0] = (char)c; 2098 buf[1] = '\0'; 2099 el_insertstr(e, buf); 2100 } 2101 2102 static int 2103 _rl_event_read_char(EditLine *el, char *cp) 2104 { 2105 int n; 2106 ssize_t num_read = 0; 2107 2108 *cp = '\0'; 2109 while (rl_event_hook) { 2110 2111 (*rl_event_hook)(); 2112 2113 #if defined(FIONREAD) 2114 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2115 return -1; 2116 if (n) 2117 num_read = read(el->el_infd, cp, (size_t)1); 2118 else 2119 num_read = 0; 2120 #elif defined(F_SETFL) && defined(O_NDELAY) 2121 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2122 return -1; 2123 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2124 return -1; 2125 num_read = read(el->el_infd, cp, 1); 2126 if (fcntl(el->el_infd, F_SETFL, n)) 2127 return -1; 2128 #else 2129 /* not non-blocking, but what you gonna do? */ 2130 num_read = read(el->el_infd, cp, 1); 2131 return -1; 2132 #endif 2133 2134 if (num_read < 0 && errno == EAGAIN) 2135 continue; 2136 if (num_read == 0) 2137 continue; 2138 break; 2139 } 2140 if (!rl_event_hook) 2141 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2142 return (int)num_read; 2143 } 2144 2145 static void 2146 _rl_update_pos(void) 2147 { 2148 const LineInfo *li = el_line(e); 2149 2150 rl_point = (int)(li->cursor - li->buffer); 2151 rl_end = (int)(li->lastchar - li->buffer); 2152 } 2153 2154 void 2155 rl_get_screen_size(int *rows, int *cols) 2156 { 2157 if (rows) 2158 el_get(e, EL_GETTC, "li", rows, (void *)0); 2159 if (cols) 2160 el_get(e, EL_GETTC, "co", cols, (void *)0); 2161 } 2162 2163 void 2164 rl_set_screen_size(int rows, int cols) 2165 { 2166 char buf[64]; 2167 (void)snprintf(buf, sizeof(buf), "%d", rows); 2168 el_set(e, EL_SETTC, "li", buf, NULL); 2169 (void)snprintf(buf, sizeof(buf), "%d", cols); 2170 el_set(e, EL_SETTC, "co", buf, NULL); 2171 } 2172 2173 char ** 2174 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2175 { 2176 size_t len, max, i, j, min; 2177 char **list, *match, *a, *b; 2178 2179 len = 1; 2180 max = 10; 2181 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2182 return NULL; 2183 2184 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2185 list[len++] = match; 2186 if (len == max) { 2187 char **nl; 2188 max += 10; 2189 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2190 goto out; 2191 list = nl; 2192 } 2193 } 2194 if (len == 1) 2195 goto out; 2196 list[len] = NULL; 2197 if (len == 2) { 2198 if ((list[0] = strdup(list[1])) == NULL) 2199 goto out; 2200 return list; 2201 } 2202 qsort(&list[1], len - 1, sizeof(*list), 2203 (int (*)(const void *, const void *)) strcmp); 2204 min = SIZE_T_MAX; 2205 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2206 b = list[i + 1]; 2207 for (j = 0; a[j] && a[j] == b[j]; j++) 2208 continue; 2209 if (min > j) 2210 min = j; 2211 } 2212 if (min == 0 && *str) { 2213 if ((list[0] = strdup(str)) == NULL) 2214 goto out; 2215 } else { 2216 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2217 goto out; 2218 (void)memcpy(list[0], list[1], min); 2219 list[0][min] = '\0'; 2220 } 2221 return list; 2222 2223 out: 2224 el_free(list); 2225 return NULL; 2226 } 2227 2228 char * 2229 rl_filename_completion_function (const char *text, int state) 2230 { 2231 return fn_filename_completion_function(text, state); 2232 } 2233 2234 void 2235 rl_forced_update_display(void) 2236 { 2237 el_set(e, EL_REFRESH); 2238 } 2239 2240 int 2241 _rl_abort_internal(void) 2242 { 2243 el_beep(e); 2244 longjmp(topbuf, 1); 2245 /*NOTREACHED*/ 2246 } 2247 2248 int 2249 _rl_qsort_string_compare(char **s1, char **s2) 2250 { 2251 return strcoll(*s1, *s2); 2252 } 2253 2254 HISTORY_STATE * 2255 history_get_history_state(void) 2256 { 2257 HISTORY_STATE *hs; 2258 2259 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2260 return NULL; 2261 hs->length = history_length; 2262 return hs; 2263 } 2264 2265 int 2266 /*ARGSUSED*/ 2267 rl_kill_text(int from __attribute__((__unused__)), 2268 int to __attribute__((__unused__))) 2269 { 2270 return 0; 2271 } 2272 2273 Keymap 2274 rl_make_bare_keymap(void) 2275 { 2276 return NULL; 2277 } 2278 2279 Keymap 2280 rl_get_keymap(void) 2281 { 2282 return NULL; 2283 } 2284 2285 void 2286 /*ARGSUSED*/ 2287 rl_set_keymap(Keymap k __attribute__((__unused__))) 2288 { 2289 } 2290 2291 int 2292 /*ARGSUSED*/ 2293 rl_generic_bind(int type __attribute__((__unused__)), 2294 const char * keyseq __attribute__((__unused__)), 2295 const char * data __attribute__((__unused__)), 2296 Keymap k __attribute__((__unused__))) 2297 { 2298 return 0; 2299 } 2300 2301 int 2302 /*ARGSUSED*/ 2303 rl_bind_key_in_map(int key __attribute__((__unused__)), 2304 rl_command_func_t *fun __attribute__((__unused__)), 2305 Keymap k __attribute__((__unused__))) 2306 { 2307 return 0; 2308 } 2309 2310 /* unsupported, but needed by python */ 2311 void 2312 rl_cleanup_after_signal(void) 2313 { 2314 } 2315 2316 int 2317 rl_on_new_line(void) 2318 { 2319 return 0; 2320 } 2321 2322 void 2323 rl_free_line_state(void) 2324 { 2325 } 2326