1 /* $NetBSD: readline.c,v 1.114 2015/03/24 21:29:52 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 1.114 2015/03/24 21:29:52 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <stdio.h> 40 #include <dirent.h> 41 #include <string.h> 42 #include <pwd.h> 43 #include <ctype.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <setjmp.h> 50 #include <vis.h> 51 52 #include "editline/readline.h" 53 #include "el.h" 54 #include "fcns.h" /* for EL_NUM_FCNS */ 55 #include "histedit.h" 56 #include "filecomplete.h" 57 58 #if !defined(SIZE_T_MAX) 59 # define SIZE_T_MAX (size_t)(-1) 60 #endif 61 62 void rl_prep_terminal(int); 63 void rl_deprep_terminal(void); 64 65 /* for rl_complete() */ 66 #define TAB '\r' 67 68 /* see comment at the #ifdef for sense of this */ 69 /* #define GDB_411_HACK */ 70 71 /* readline compatibility stuff - look at readline sources/documentation */ 72 /* to see what these variables mean */ 73 const char *rl_library_version = "EditLine wrapper"; 74 int rl_readline_version = RL_READLINE_VERSION; 75 static char empty[] = { '\0' }; 76 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 77 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 78 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 79 char *rl_readline_name = empty; 80 FILE *rl_instream = NULL; 81 FILE *rl_outstream = NULL; 82 int rl_point = 0; 83 int rl_end = 0; 84 char *rl_line_buffer = NULL; 85 VCPFunction *rl_linefunc = NULL; 86 int rl_done = 0; 87 VFunction *rl_event_hook = NULL; 88 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 89 emacs_meta_keymap, 90 emacs_ctlx_keymap; 91 /* 92 * The following is not implemented; we always catch signals in the 93 * libedit fashion: set handlers on entry to el_gets() and clear them 94 * on the way out. This simplistic approach works for most cases; if 95 * it does not work for your application, please let us know. 96 */ 97 int rl_catch_signals = 1; 98 int rl_catch_sigwinch = 1; 99 100 int history_base = 1; /* probably never subject to change */ 101 int history_length = 0; 102 int max_input_history = 0; 103 char history_expansion_char = '!'; 104 char history_subst_char = '^'; 105 char *history_no_expand_chars = expand_chars; 106 Function *history_inhibit_expansion_function = NULL; 107 char *history_arg_extract(int start, int end, const char *str); 108 109 int rl_inhibit_completion = 0; 110 int rl_attempted_completion_over = 0; 111 char *rl_basic_word_break_characters = break_chars; 112 char *rl_completer_word_break_characters = NULL; 113 char *rl_completer_quote_characters = NULL; 114 Function *rl_completion_entry_function = NULL; 115 char *(*rl_completion_word_break_hook)(void) = NULL; 116 CPPFunction *rl_attempted_completion_function = NULL; 117 Function *rl_pre_input_hook = NULL; 118 Function *rl_startup1_hook = NULL; 119 int (*rl_getc_function)(FILE *) = NULL; 120 char *rl_terminal_name = NULL; 121 int rl_already_prompted = 0; 122 int rl_filename_completion_desired = 0; 123 int rl_ignore_completion_duplicates = 0; 124 int readline_echoing_p = 1; 125 int _rl_print_completions_horizontally = 0; 126 VFunction *rl_redisplay_function = NULL; 127 Function *rl_startup_hook = NULL; 128 VFunction *rl_completion_display_matches_hook = NULL; 129 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 130 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 131 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 132 133 /* 134 * The current prompt string. 135 */ 136 char *rl_prompt = NULL; 137 /* 138 * This is set to character indicating type of completion being done by 139 * rl_complete_internal(); this is available for application completion 140 * functions. 141 */ 142 int rl_completion_type = 0; 143 144 /* 145 * If more than this number of items results from query for possible 146 * completions, we ask user if they are sure to really display the list. 147 */ 148 int rl_completion_query_items = 100; 149 150 /* 151 * List of characters which are word break characters, but should be left 152 * in the parsed text when it is passed to the completion function. 153 * Shell uses this to help determine what kind of completing to do. 154 */ 155 char *rl_special_prefixes = NULL; 156 157 /* 158 * This is the character appended to the completed words if at the end of 159 * the line. Default is ' ' (a space). 160 */ 161 int rl_completion_append_character = ' '; 162 163 /* stuff below is used internally by libedit for readline emulation */ 164 165 static History *h = NULL; 166 static EditLine *e = NULL; 167 static Function *map[256]; 168 static jmp_buf topbuf; 169 170 /* internal functions */ 171 static unsigned char _el_rl_complete(EditLine *, int); 172 static unsigned char _el_rl_tstp(EditLine *, int); 173 static char *_get_prompt(EditLine *); 174 static int _getc_function(EditLine *, char *); 175 static HIST_ENTRY *_move_history(int); 176 static int _history_expand_command(const char *, size_t, size_t, 177 char **); 178 static char *_rl_compat_sub(const char *, const char *, 179 const char *, int); 180 static int _rl_event_read_char(EditLine *, char *); 181 static void _rl_update_pos(void); 182 183 184 /* ARGSUSED */ 185 static char * 186 _get_prompt(EditLine *el __attribute__((__unused__))) 187 { 188 rl_already_prompted = 1; 189 return rl_prompt; 190 } 191 192 193 /* 194 * generic function for moving around history 195 */ 196 static HIST_ENTRY * 197 _move_history(int op) 198 { 199 HistEvent ev; 200 static HIST_ENTRY rl_he; 201 202 if (history(h, &ev, op) != 0) 203 return NULL; 204 205 rl_he.line = ev.str; 206 rl_he.data = NULL; 207 208 return &rl_he; 209 } 210 211 212 /* 213 * read one key from user defined input function 214 */ 215 static int 216 /*ARGSUSED*/ 217 _getc_function(EditLine *el __attribute__((__unused__)), char *c) 218 { 219 int i; 220 221 i = (*rl_getc_function)(NULL); 222 if (i == -1) 223 return 0; 224 *c = (char)i; 225 return 1; 226 } 227 228 static void 229 _resize_fun(EditLine *el, void *a) 230 { 231 const LineInfo *li; 232 char **ap = a; 233 234 li = el_line(el); 235 /* a cheesy way to get rid of const cast. */ 236 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 237 } 238 239 static const char * 240 _default_history_file(void) 241 { 242 struct passwd *p; 243 static char *path; 244 size_t len; 245 246 if (path) 247 return path; 248 249 if ((p = getpwuid(getuid())) == NULL) 250 return NULL; 251 252 len = strlen(p->pw_dir) + sizeof("/.history"); 253 if ((path = malloc(len)) == NULL) 254 return NULL; 255 256 (void)snprintf(path, len, "%s/.history", p->pw_dir); 257 return path; 258 } 259 260 /* 261 * READLINE compatibility stuff 262 */ 263 264 /* 265 * Set the prompt 266 */ 267 int 268 rl_set_prompt(const char *prompt) 269 { 270 char *p; 271 272 if (!prompt) 273 prompt = ""; 274 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 275 return 0; 276 if (rl_prompt) 277 el_free(rl_prompt); 278 rl_prompt = strdup(prompt); 279 if (rl_prompt == NULL) 280 return -1; 281 282 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 283 *p = RL_PROMPT_START_IGNORE; 284 285 return 0; 286 } 287 288 /* 289 * initialize rl compat stuff 290 */ 291 int 292 rl_initialize(void) 293 { 294 HistEvent ev; 295 int editmode = 1; 296 struct termios t; 297 298 if (e != NULL) 299 el_end(e); 300 if (h != NULL) 301 history_end(h); 302 303 if (!rl_instream) 304 rl_instream = stdin; 305 if (!rl_outstream) 306 rl_outstream = stdout; 307 308 /* 309 * See if we don't really want to run the editor 310 */ 311 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 312 editmode = 0; 313 314 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 315 316 if (!editmode) 317 el_set(e, EL_EDITMODE, 0); 318 319 h = history_init(); 320 if (!e || !h) 321 return -1; 322 323 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 324 history_length = 0; 325 max_input_history = INT_MAX; 326 el_set(e, EL_HIST, history, h); 327 328 /* Setup resize function */ 329 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 330 331 /* setup getc function if valid */ 332 if (rl_getc_function) 333 el_set(e, EL_GETCFN, _getc_function); 334 335 /* for proper prompt printing in readline() */ 336 if (rl_set_prompt("") == -1) { 337 history_end(h); 338 el_end(e); 339 return -1; 340 } 341 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 342 el_set(e, EL_SIGNAL, rl_catch_signals); 343 344 /* set default mode to "emacs"-style and read setting afterwards */ 345 /* so this can be overridden */ 346 el_set(e, EL_EDITOR, "emacs"); 347 if (rl_terminal_name != NULL) 348 el_set(e, EL_TERMINAL, rl_terminal_name); 349 else 350 el_get(e, EL_TERMINAL, &rl_terminal_name); 351 352 /* 353 * Word completion - this has to go AFTER rebinding keys 354 * to emacs-style. 355 */ 356 el_set(e, EL_ADDFN, "rl_complete", 357 "ReadLine compatible completion function", 358 _el_rl_complete); 359 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 360 361 /* 362 * Send TSTP when ^Z is pressed. 363 */ 364 el_set(e, EL_ADDFN, "rl_tstp", 365 "ReadLine compatible suspend function", 366 _el_rl_tstp); 367 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 368 369 /* 370 * Set some readline compatible key-bindings. 371 */ 372 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 373 374 /* 375 * Allow the use of Home/End keys. 376 */ 377 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 378 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 379 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 380 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 381 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 382 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 383 384 /* 385 * Allow the use of the Delete/Insert keys. 386 */ 387 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 388 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 389 390 /* 391 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 392 */ 393 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 394 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 395 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 396 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 397 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 398 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 399 400 /* read settings from configuration file */ 401 el_source(e, NULL); 402 403 /* 404 * Unfortunately, some applications really do use rl_point 405 * and rl_line_buffer directly. 406 */ 407 _resize_fun(e, &rl_line_buffer); 408 _rl_update_pos(); 409 410 if (rl_startup_hook) 411 (*rl_startup_hook)(NULL, 0); 412 413 return 0; 414 } 415 416 417 /* 418 * read one line from input stream and return it, chomping 419 * trailing newline (if there is any) 420 */ 421 char * 422 readline(const char *p) 423 { 424 HistEvent ev; 425 const char * volatile prompt = p; 426 int count; 427 const char *ret; 428 char *buf; 429 static int used_event_hook; 430 431 if (e == NULL || h == NULL) 432 rl_initialize(); 433 434 rl_done = 0; 435 436 (void)setjmp(topbuf); 437 438 /* update prompt accordingly to what has been passed */ 439 if (rl_set_prompt(prompt) == -1) 440 return NULL; 441 442 if (rl_pre_input_hook) 443 (*rl_pre_input_hook)(NULL, 0); 444 445 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 446 el_set(e, EL_GETCFN, _rl_event_read_char); 447 used_event_hook = 1; 448 } 449 450 if (!rl_event_hook && used_event_hook) { 451 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 452 used_event_hook = 0; 453 } 454 455 rl_already_prompted = 0; 456 457 /* get one line from input stream */ 458 ret = el_gets(e, &count); 459 460 if (ret && count > 0) { 461 int lastidx; 462 463 buf = strdup(ret); 464 if (buf == NULL) 465 return NULL; 466 lastidx = count - 1; 467 if (buf[lastidx] == '\n') 468 buf[lastidx] = '\0'; 469 } else 470 buf = NULL; 471 472 history(h, &ev, H_GETSIZE); 473 history_length = ev.num; 474 475 return buf; 476 } 477 478 /* 479 * history functions 480 */ 481 482 /* 483 * is normally called before application starts to use 484 * history expansion functions 485 */ 486 void 487 using_history(void) 488 { 489 if (h == NULL || e == NULL) 490 rl_initialize(); 491 } 492 493 494 /* 495 * substitute ``what'' with ``with'', returning resulting string; if 496 * globally == 1, substitutes all occurrences of what, otherwise only the 497 * first one 498 */ 499 static char * 500 _rl_compat_sub(const char *str, const char *what, const char *with, 501 int globally) 502 { 503 const char *s; 504 char *r, *result; 505 size_t len, with_len, what_len; 506 507 len = strlen(str); 508 with_len = strlen(with); 509 what_len = strlen(what); 510 511 /* calculate length we need for result */ 512 s = str; 513 while (*s) { 514 if (*s == *what && !strncmp(s, what, what_len)) { 515 len += with_len - what_len; 516 if (!globally) 517 break; 518 s += what_len; 519 } else 520 s++; 521 } 522 r = result = el_malloc((len + 1) * sizeof(*r)); 523 if (result == NULL) 524 return NULL; 525 s = str; 526 while (*s) { 527 if (*s == *what && !strncmp(s, what, what_len)) { 528 (void)strncpy(r, with, with_len); 529 r += with_len; 530 s += what_len; 531 if (!globally) { 532 (void)strcpy(r, s); 533 return result; 534 } 535 } else 536 *r++ = *s++; 537 } 538 *r = '\0'; 539 return result; 540 } 541 542 static char *last_search_pat; /* last !?pat[?] search pattern */ 543 static char *last_search_match; /* last !?pat[?] that matched */ 544 545 const char * 546 get_history_event(const char *cmd, int *cindex, int qchar) 547 { 548 int idx, sign, sub, num, begin, ret; 549 size_t len; 550 char *pat; 551 const char *rptr; 552 HistEvent ev; 553 554 idx = *cindex; 555 if (cmd[idx++] != history_expansion_char) 556 return NULL; 557 558 /* find out which event to take */ 559 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 560 if (history(h, &ev, H_FIRST) != 0) 561 return NULL; 562 *cindex = cmd[idx]? (idx + 1):idx; 563 return ev.str; 564 } 565 sign = 0; 566 if (cmd[idx] == '-') { 567 sign = 1; 568 idx++; 569 } 570 571 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 572 HIST_ENTRY *rl_he; 573 574 num = 0; 575 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 576 num = num * 10 + cmd[idx] - '0'; 577 idx++; 578 } 579 if (sign) 580 num = history_length - num + 1; 581 582 if (!(rl_he = history_get(num))) 583 return NULL; 584 585 *cindex = idx; 586 return rl_he->line; 587 } 588 sub = 0; 589 if (cmd[idx] == '?') { 590 sub = 1; 591 idx++; 592 } 593 begin = idx; 594 while (cmd[idx]) { 595 if (cmd[idx] == '\n') 596 break; 597 if (sub && cmd[idx] == '?') 598 break; 599 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 600 || cmd[idx] == '\t' || cmd[idx] == qchar)) 601 break; 602 idx++; 603 } 604 len = (size_t)idx - (size_t)begin; 605 if (sub && cmd[idx] == '?') 606 idx++; 607 if (sub && len == 0 && last_search_pat && *last_search_pat) 608 pat = last_search_pat; 609 else if (len == 0) 610 return NULL; 611 else { 612 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 613 return NULL; 614 (void)strncpy(pat, cmd + begin, len); 615 pat[len] = '\0'; 616 } 617 618 if (history(h, &ev, H_CURR) != 0) { 619 if (pat != last_search_pat) 620 el_free(pat); 621 return NULL; 622 } 623 num = ev.num; 624 625 if (sub) { 626 if (pat != last_search_pat) { 627 if (last_search_pat) 628 el_free(last_search_pat); 629 last_search_pat = pat; 630 } 631 ret = history_search(pat, -1); 632 } else 633 ret = history_search_prefix(pat, -1); 634 635 if (ret == -1) { 636 /* restore to end of list on failed search */ 637 history(h, &ev, H_FIRST); 638 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 639 if (pat != last_search_pat) 640 el_free(pat); 641 return NULL; 642 } 643 644 if (sub && len) { 645 if (last_search_match && last_search_match != pat) 646 el_free(last_search_match); 647 last_search_match = pat; 648 } 649 650 if (pat != last_search_pat) 651 el_free(pat); 652 653 if (history(h, &ev, H_CURR) != 0) 654 return NULL; 655 *cindex = idx; 656 rptr = ev.str; 657 658 /* roll back to original position */ 659 (void)history(h, &ev, H_SET, num); 660 661 return rptr; 662 } 663 664 /* 665 * the real function doing history expansion - takes as argument command 666 * to do and data upon which the command should be executed 667 * does expansion the way I've understood readline documentation 668 * 669 * returns 0 if data was not modified, 1 if it was and 2 if the string 670 * should be only printed and not executed; in case of error, 671 * returns -1 and *result points to NULL 672 * it's the caller's responsibility to free() the string returned in *result 673 */ 674 static int 675 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 676 char **result) 677 { 678 char *tmp, *search = NULL, *aptr; 679 const char *ptr, *cmd; 680 static char *from = NULL, *to = NULL; 681 int start, end, idx, has_mods = 0; 682 int p_on = 0, g_on = 0; 683 684 *result = NULL; 685 aptr = NULL; 686 ptr = NULL; 687 688 /* First get event specifier */ 689 idx = 0; 690 691 if (strchr(":^*$", command[offs + 1])) { 692 char str[4]; 693 /* 694 * "!:" is shorthand for "!!:". 695 * "!^", "!*" and "!$" are shorthand for 696 * "!!:^", "!!:*" and "!!:$" respectively. 697 */ 698 str[0] = str[1] = '!'; 699 str[2] = '0'; 700 ptr = get_history_event(str, &idx, 0); 701 idx = (command[offs + 1] == ':')? 1:0; 702 has_mods = 1; 703 } else { 704 if (command[offs + 1] == '#') { 705 /* use command so far */ 706 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 707 == NULL) 708 return -1; 709 (void)strncpy(aptr, command, offs); 710 aptr[offs] = '\0'; 711 idx = 1; 712 } else { 713 int qchar; 714 715 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 716 ptr = get_history_event(command + offs, &idx, qchar); 717 } 718 has_mods = command[offs + (size_t)idx] == ':'; 719 } 720 721 if (ptr == NULL && aptr == NULL) 722 return -1; 723 724 if (!has_mods) { 725 *result = strdup(aptr ? aptr : ptr); 726 if (aptr) 727 el_free(aptr); 728 if (*result == NULL) 729 return -1; 730 return 1; 731 } 732 733 cmd = command + offs + idx + 1; 734 735 /* Now parse any word designators */ 736 737 if (*cmd == '%') /* last word matched by ?pat? */ 738 tmp = strdup(last_search_match? last_search_match:""); 739 else if (strchr("^*$-0123456789", *cmd)) { 740 start = end = -1; 741 if (*cmd == '^') 742 start = end = 1, cmd++; 743 else if (*cmd == '$') 744 start = -1, cmd++; 745 else if (*cmd == '*') 746 start = 1, cmd++; 747 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 748 start = 0; 749 while (*cmd && '0' <= *cmd && *cmd <= '9') 750 start = start * 10 + *cmd++ - '0'; 751 752 if (*cmd == '-') { 753 if (isdigit((unsigned char) cmd[1])) { 754 cmd++; 755 end = 0; 756 while (*cmd && '0' <= *cmd && *cmd <= '9') 757 end = end * 10 + *cmd++ - '0'; 758 } else if (cmd[1] == '$') { 759 cmd += 2; 760 end = -1; 761 } else { 762 cmd++; 763 end = -2; 764 } 765 } else if (*cmd == '*') 766 end = -1, cmd++; 767 else 768 end = start; 769 } 770 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 771 if (tmp == NULL) { 772 (void)fprintf(rl_outstream, "%s: Bad word specifier", 773 command + offs + idx); 774 if (aptr) 775 el_free(aptr); 776 return -1; 777 } 778 } else 779 tmp = strdup(aptr? aptr:ptr); 780 781 if (aptr) 782 el_free(aptr); 783 784 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 785 *result = tmp; 786 return 1; 787 } 788 789 for (; *cmd; cmd++) { 790 if (*cmd == ':') 791 continue; 792 else if (*cmd == 'h') { /* remove trailing path */ 793 if ((aptr = strrchr(tmp, '/')) != NULL) 794 *aptr = '\0'; 795 } else if (*cmd == 't') { /* remove leading path */ 796 if ((aptr = strrchr(tmp, '/')) != NULL) { 797 aptr = strdup(aptr + 1); 798 el_free(tmp); 799 tmp = aptr; 800 } 801 } else if (*cmd == 'r') { /* remove trailing suffix */ 802 if ((aptr = strrchr(tmp, '.')) != NULL) 803 *aptr = '\0'; 804 } else if (*cmd == 'e') { /* remove all but suffix */ 805 if ((aptr = strrchr(tmp, '.')) != NULL) { 806 aptr = strdup(aptr); 807 el_free(tmp); 808 tmp = aptr; 809 } 810 } else if (*cmd == 'p') /* print only */ 811 p_on = 1; 812 else if (*cmd == 'g') 813 g_on = 2; 814 else if (*cmd == 's' || *cmd == '&') { 815 char *what, *with, delim; 816 size_t len, from_len; 817 size_t size; 818 819 if (*cmd == '&' && (from == NULL || to == NULL)) 820 continue; 821 else if (*cmd == 's') { 822 delim = *(++cmd), cmd++; 823 size = 16; 824 what = el_realloc(from, size * sizeof(*what)); 825 if (what == NULL) { 826 el_free(from); 827 el_free(tmp); 828 return 0; 829 } 830 len = 0; 831 for (; *cmd && *cmd != delim; cmd++) { 832 if (*cmd == '\\' && cmd[1] == delim) 833 cmd++; 834 if (len >= size) { 835 char *nwhat; 836 nwhat = el_realloc(what, 837 (size <<= 1) * 838 sizeof(*nwhat)); 839 if (nwhat == NULL) { 840 el_free(what); 841 el_free(tmp); 842 return 0; 843 } 844 what = nwhat; 845 } 846 what[len++] = *cmd; 847 } 848 what[len] = '\0'; 849 from = what; 850 if (*what == '\0') { 851 el_free(what); 852 if (search) { 853 from = strdup(search); 854 if (from == NULL) { 855 el_free(tmp); 856 return 0; 857 } 858 } else { 859 from = NULL; 860 el_free(tmp); 861 return -1; 862 } 863 } 864 cmd++; /* shift after delim */ 865 if (!*cmd) 866 continue; 867 868 size = 16; 869 with = el_realloc(to, size * sizeof(*with)); 870 if (with == NULL) { 871 el_free(to); 872 el_free(tmp); 873 return -1; 874 } 875 len = 0; 876 from_len = strlen(from); 877 for (; *cmd && *cmd != delim; cmd++) { 878 if (len + from_len + 1 >= size) { 879 char *nwith; 880 size += from_len + 1; 881 nwith = el_realloc(with, 882 size * sizeof(*nwith)); 883 if (nwith == NULL) { 884 el_free(with); 885 el_free(tmp); 886 return -1; 887 } 888 with = nwith; 889 } 890 if (*cmd == '&') { 891 /* safe */ 892 (void)strcpy(&with[len], from); 893 len += from_len; 894 continue; 895 } 896 if (*cmd == '\\' 897 && (*(cmd + 1) == delim 898 || *(cmd + 1) == '&')) 899 cmd++; 900 with[len++] = *cmd; 901 } 902 with[len] = '\0'; 903 to = with; 904 } 905 906 aptr = _rl_compat_sub(tmp, from, to, g_on); 907 if (aptr) { 908 el_free(tmp); 909 tmp = aptr; 910 } 911 g_on = 0; 912 } 913 } 914 *result = tmp; 915 return p_on? 2:1; 916 } 917 918 919 /* 920 * csh-style history expansion 921 */ 922 int 923 history_expand(char *str, char **output) 924 { 925 int ret = 0; 926 size_t idx, i, size; 927 char *tmp, *result; 928 929 if (h == NULL || e == NULL) 930 rl_initialize(); 931 932 if (history_expansion_char == 0) { 933 *output = strdup(str); 934 return 0; 935 } 936 937 *output = NULL; 938 if (str[0] == history_subst_char) { 939 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 940 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 941 if (*output == NULL) 942 return 0; 943 (*output)[0] = (*output)[1] = history_expansion_char; 944 (*output)[2] = ':'; 945 (*output)[3] = 's'; 946 (void)strcpy((*output) + 4, str); 947 str = *output; 948 } else { 949 *output = strdup(str); 950 if (*output == NULL) 951 return 0; 952 } 953 954 #define ADD_STRING(what, len, fr) \ 955 { \ 956 if (idx + len + 1 > size) { \ 957 char *nresult = el_realloc(result, \ 958 (size += len + 1) * sizeof(*nresult)); \ 959 if (nresult == NULL) { \ 960 el_free(*output); \ 961 if (/*CONSTCOND*/fr) \ 962 el_free(tmp); \ 963 return 0; \ 964 } \ 965 result = nresult; \ 966 } \ 967 (void)strncpy(&result[idx], what, len); \ 968 idx += len; \ 969 result[idx] = '\0'; \ 970 } 971 972 result = NULL; 973 size = idx = 0; 974 tmp = NULL; 975 for (i = 0; str[i];) { 976 int qchar, loop_again; 977 size_t len, start, j; 978 979 qchar = 0; 980 loop_again = 1; 981 start = j = i; 982 loop: 983 for (; str[j]; j++) { 984 if (str[j] == '\\' && 985 str[j + 1] == history_expansion_char) { 986 (void)strcpy(&str[j], &str[j + 1]); 987 continue; 988 } 989 if (!loop_again) { 990 if (isspace((unsigned char) str[j]) 991 || str[j] == qchar) 992 break; 993 } 994 if (str[j] == history_expansion_char 995 && !strchr(history_no_expand_chars, str[j + 1]) 996 && (!history_inhibit_expansion_function || 997 (*history_inhibit_expansion_function)(str, 998 (int)j) == 0)) 999 break; 1000 } 1001 1002 if (str[j] && loop_again) { 1003 i = j; 1004 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1005 j++; 1006 if (str[j] == history_expansion_char) 1007 j++; 1008 loop_again = 0; 1009 goto loop; 1010 } 1011 len = i - start; 1012 ADD_STRING(&str[start], len, 0); 1013 1014 if (str[i] == '\0' || str[i] != history_expansion_char) { 1015 len = j - i; 1016 ADD_STRING(&str[i], len, 0); 1017 if (start == 0) 1018 ret = 0; 1019 else 1020 ret = 1; 1021 break; 1022 } 1023 ret = _history_expand_command (str, i, (j - i), &tmp); 1024 if (ret > 0 && tmp) { 1025 len = strlen(tmp); 1026 ADD_STRING(tmp, len, 1); 1027 } 1028 if (tmp) { 1029 el_free(tmp); 1030 tmp = NULL; 1031 } 1032 i = j; 1033 } 1034 1035 /* ret is 2 for "print only" option */ 1036 if (ret == 2) { 1037 add_history(result); 1038 #ifdef GDB_411_HACK 1039 /* gdb 4.11 has been shipped with readline, where */ 1040 /* history_expand() returned -1 when the line */ 1041 /* should not be executed; in readline 2.1+ */ 1042 /* it should return 2 in such a case */ 1043 ret = -1; 1044 #endif 1045 } 1046 el_free(*output); 1047 *output = result; 1048 1049 return ret; 1050 } 1051 1052 /* 1053 * Return a string consisting of arguments of "str" from "start" to "end". 1054 */ 1055 char * 1056 history_arg_extract(int start, int end, const char *str) 1057 { 1058 size_t i, len, max; 1059 char **arr, *result = NULL; 1060 1061 arr = history_tokenize(str); 1062 if (!arr) 1063 return NULL; 1064 if (arr && *arr == NULL) 1065 goto out; 1066 1067 for (max = 0; arr[max]; max++) 1068 continue; 1069 max--; 1070 1071 if (start == '$') 1072 start = (int)max; 1073 if (end == '$') 1074 end = (int)max; 1075 if (end < 0) 1076 end = (int)max + end + 1; 1077 if (start < 0) 1078 start = end; 1079 1080 if (start < 0 || end < 0 || (size_t)start > max || 1081 (size_t)end > max || start > end) 1082 goto out; 1083 1084 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1085 len += strlen(arr[i]) + 1; 1086 len++; 1087 result = el_malloc(len * sizeof(*result)); 1088 if (result == NULL) 1089 goto out; 1090 1091 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1092 (void)strcpy(result + len, arr[i]); 1093 len += strlen(arr[i]); 1094 if (i < (size_t)end) 1095 result[len++] = ' '; 1096 } 1097 result[len] = '\0'; 1098 1099 out: 1100 for (i = 0; arr[i]; i++) 1101 el_free(arr[i]); 1102 el_free(arr); 1103 1104 return result; 1105 } 1106 1107 /* 1108 * Parse the string into individual tokens, 1109 * similar to how shell would do it. 1110 */ 1111 char ** 1112 history_tokenize(const char *str) 1113 { 1114 int size = 1, idx = 0, i, start; 1115 size_t len; 1116 char **result = NULL, *temp, delim = '\0'; 1117 1118 for (i = 0; str[i];) { 1119 while (isspace((unsigned char) str[i])) 1120 i++; 1121 start = i; 1122 for (; str[i];) { 1123 if (str[i] == '\\') { 1124 if (str[i+1] != '\0') 1125 i++; 1126 } else if (str[i] == delim) 1127 delim = '\0'; 1128 else if (!delim && 1129 (isspace((unsigned char) str[i]) || 1130 strchr("()<>;&|$", str[i]))) 1131 break; 1132 else if (!delim && strchr("'`\"", str[i])) 1133 delim = str[i]; 1134 if (str[i]) 1135 i++; 1136 } 1137 1138 if (idx + 2 >= size) { 1139 char **nresult; 1140 size <<= 1; 1141 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1142 if (nresult == NULL) { 1143 el_free(result); 1144 return NULL; 1145 } 1146 result = nresult; 1147 } 1148 len = (size_t)i - (size_t)start; 1149 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1150 if (temp == NULL) { 1151 for (i = 0; i < idx; i++) 1152 el_free(result[i]); 1153 el_free(result); 1154 return NULL; 1155 } 1156 (void)strncpy(temp, &str[start], len); 1157 temp[len] = '\0'; 1158 result[idx++] = temp; 1159 result[idx] = NULL; 1160 if (str[i]) 1161 i++; 1162 } 1163 return result; 1164 } 1165 1166 1167 /* 1168 * limit size of history record to ``max'' events 1169 */ 1170 void 1171 stifle_history(int max) 1172 { 1173 HistEvent ev; 1174 1175 if (h == NULL || e == NULL) 1176 rl_initialize(); 1177 1178 if (history(h, &ev, H_SETSIZE, max) == 0) 1179 max_input_history = max; 1180 } 1181 1182 1183 /* 1184 * "unlimit" size of history - set the limit to maximum allowed int value 1185 */ 1186 int 1187 unstifle_history(void) 1188 { 1189 HistEvent ev; 1190 int omax; 1191 1192 history(h, &ev, H_SETSIZE, INT_MAX); 1193 omax = max_input_history; 1194 max_input_history = INT_MAX; 1195 return omax; /* some value _must_ be returned */ 1196 } 1197 1198 1199 int 1200 history_is_stifled(void) 1201 { 1202 1203 /* cannot return true answer */ 1204 return max_input_history != INT_MAX; 1205 } 1206 1207 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1208 1209 int 1210 history_truncate_file (const char *filename, int nlines) 1211 { 1212 int ret = 0; 1213 FILE *fp, *tp; 1214 char template[sizeof(_history_tmp_template)]; 1215 char buf[4096]; 1216 int fd; 1217 char *cp; 1218 off_t off; 1219 int count = 0; 1220 ssize_t left = 0; 1221 1222 if (filename == NULL && (filename = _default_history_file()) == NULL) 1223 return errno; 1224 if ((fp = fopen(filename, "r+")) == NULL) 1225 return errno; 1226 strcpy(template, _history_tmp_template); 1227 if ((fd = mkstemp(template)) == -1) { 1228 ret = errno; 1229 goto out1; 1230 } 1231 1232 if ((tp = fdopen(fd, "r+")) == NULL) { 1233 close(fd); 1234 ret = errno; 1235 goto out2; 1236 } 1237 1238 for(;;) { 1239 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1240 if (ferror(fp)) { 1241 ret = errno; 1242 break; 1243 } 1244 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1245 (off_t)-1) { 1246 ret = errno; 1247 break; 1248 } 1249 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1250 if (ferror(fp)) { 1251 ret = errno; 1252 break; 1253 } 1254 if (left == 0) { 1255 count--; 1256 left = sizeof(buf); 1257 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1258 != 1) { 1259 ret = errno; 1260 break; 1261 } 1262 fflush(tp); 1263 break; 1264 } 1265 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1266 ret = errno; 1267 break; 1268 } 1269 count++; 1270 } 1271 if (ret) 1272 goto out3; 1273 cp = buf + left - 1; 1274 if(*cp != '\n') 1275 cp++; 1276 for(;;) { 1277 while (--cp >= buf) { 1278 if (*cp == '\n') { 1279 if (--nlines == 0) { 1280 if (++cp >= buf + sizeof(buf)) { 1281 count++; 1282 cp = buf; 1283 } 1284 break; 1285 } 1286 } 1287 } 1288 if (nlines <= 0 || count == 0) 1289 break; 1290 count--; 1291 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1292 ret = errno; 1293 break; 1294 } 1295 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1296 if (ferror(tp)) { 1297 ret = errno; 1298 break; 1299 } 1300 ret = EAGAIN; 1301 break; 1302 } 1303 cp = buf + sizeof(buf); 1304 } 1305 1306 if (ret || nlines > 0) 1307 goto out3; 1308 1309 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1310 ret = errno; 1311 goto out3; 1312 } 1313 1314 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1315 (off_t)-1) { 1316 ret = errno; 1317 goto out3; 1318 } 1319 1320 for(;;) { 1321 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1322 if (ferror(fp)) 1323 ret = errno; 1324 break; 1325 } 1326 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1327 ret = errno; 1328 break; 1329 } 1330 } 1331 fflush(fp); 1332 if((off = ftello(fp)) > 0) 1333 (void)ftruncate(fileno(fp), off); 1334 out3: 1335 fclose(tp); 1336 out2: 1337 unlink(template); 1338 out1: 1339 fclose(fp); 1340 1341 return ret; 1342 } 1343 1344 1345 /* 1346 * read history from a file given 1347 */ 1348 int 1349 read_history(const char *filename) 1350 { 1351 HistEvent ev; 1352 1353 if (h == NULL || e == NULL) 1354 rl_initialize(); 1355 if (filename == NULL && (filename = _default_history_file()) == NULL) 1356 return errno; 1357 return history(h, &ev, H_LOAD, filename) == -1 ? 1358 (errno ? errno : EINVAL) : 0; 1359 } 1360 1361 1362 /* 1363 * write history to a file given 1364 */ 1365 int 1366 write_history(const char *filename) 1367 { 1368 HistEvent ev; 1369 1370 if (h == NULL || e == NULL) 1371 rl_initialize(); 1372 if (filename == NULL && (filename = _default_history_file()) == NULL) 1373 return errno; 1374 return history(h, &ev, H_SAVE, filename) == -1 ? 1375 (errno ? errno : EINVAL) : 0; 1376 } 1377 1378 1379 /* 1380 * returns history ``num''th event 1381 * 1382 * returned pointer points to static variable 1383 */ 1384 HIST_ENTRY * 1385 history_get(int num) 1386 { 1387 static HIST_ENTRY she; 1388 HistEvent ev; 1389 int curr_num; 1390 1391 if (h == NULL || e == NULL) 1392 rl_initialize(); 1393 1394 /* save current position */ 1395 if (history(h, &ev, H_CURR) != 0) 1396 return NULL; 1397 curr_num = ev.num; 1398 1399 /* start from the oldest */ 1400 if (history(h, &ev, H_LAST) != 0) 1401 return NULL; /* error */ 1402 1403 /* look forwards for event matching specified offset */ 1404 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data)) 1405 return NULL; 1406 1407 she.line = ev.str; 1408 1409 /* restore pointer to where it was */ 1410 (void)history(h, &ev, H_SET, curr_num); 1411 1412 return &she; 1413 } 1414 1415 1416 /* 1417 * add the line to history table 1418 */ 1419 int 1420 add_history(const char *line) 1421 { 1422 HistEvent ev; 1423 1424 if (line == NULL) 1425 return 0; 1426 1427 if (h == NULL || e == NULL) 1428 rl_initialize(); 1429 1430 (void)history(h, &ev, H_ENTER, line); 1431 if (history(h, &ev, H_GETSIZE) == 0) 1432 history_length = ev.num; 1433 1434 return !(history_length > 0); /* return 0 if all is okay */ 1435 } 1436 1437 1438 /* 1439 * remove the specified entry from the history list and return it. 1440 */ 1441 HIST_ENTRY * 1442 remove_history(int num) 1443 { 1444 HIST_ENTRY *he; 1445 HistEvent ev; 1446 1447 if (h == NULL || e == NULL) 1448 rl_initialize(); 1449 1450 if ((he = el_malloc(sizeof(*he))) == NULL) 1451 return NULL; 1452 1453 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1454 el_free(he); 1455 return NULL; 1456 } 1457 1458 he->line = ev.str; 1459 if (history(h, &ev, H_GETSIZE) == 0) 1460 history_length = ev.num; 1461 1462 return he; 1463 } 1464 1465 1466 /* 1467 * replace the line and data of the num-th entry 1468 */ 1469 HIST_ENTRY * 1470 replace_history_entry(int num, const char *line, histdata_t data) 1471 { 1472 HIST_ENTRY *he; 1473 HistEvent ev; 1474 int curr_num; 1475 1476 if (h == NULL || e == NULL) 1477 rl_initialize(); 1478 1479 /* save current position */ 1480 if (history(h, &ev, H_CURR) != 0) 1481 return NULL; 1482 curr_num = ev.num; 1483 1484 /* start from the oldest */ 1485 if (history(h, &ev, H_LAST) != 0) 1486 return NULL; /* error */ 1487 1488 if ((he = el_malloc(sizeof(*he))) == NULL) 1489 return NULL; 1490 1491 /* look forwards for event matching specified offset */ 1492 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1493 goto out; 1494 1495 he->line = strdup(ev.str); 1496 if (he->line == NULL) 1497 goto out; 1498 1499 if (history(h, &ev, H_REPLACE, line, data)) 1500 goto out; 1501 1502 /* restore pointer to where it was */ 1503 if (history(h, &ev, H_SET, curr_num)) 1504 goto out; 1505 1506 return he; 1507 out: 1508 el_free(he); 1509 return NULL; 1510 } 1511 1512 /* 1513 * clear the history list - delete all entries 1514 */ 1515 void 1516 clear_history(void) 1517 { 1518 HistEvent ev; 1519 1520 if (h == NULL || e == NULL) 1521 rl_initialize(); 1522 1523 (void)history(h, &ev, H_CLEAR); 1524 history_length = 0; 1525 } 1526 1527 1528 /* 1529 * returns offset of the current history event 1530 */ 1531 int 1532 where_history(void) 1533 { 1534 HistEvent ev; 1535 int curr_num, off; 1536 1537 if (history(h, &ev, H_CURR) != 0) 1538 return 0; 1539 curr_num = ev.num; 1540 1541 (void)history(h, &ev, H_FIRST); 1542 off = 1; 1543 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1544 off++; 1545 1546 return off; 1547 } 1548 1549 1550 /* 1551 * returns current history event or NULL if there is no such event 1552 */ 1553 HIST_ENTRY * 1554 current_history(void) 1555 { 1556 1557 return _move_history(H_CURR); 1558 } 1559 1560 1561 /* 1562 * returns total number of bytes history events' data are using 1563 */ 1564 int 1565 history_total_bytes(void) 1566 { 1567 HistEvent ev; 1568 int curr_num; 1569 size_t size; 1570 1571 if (history(h, &ev, H_CURR) != 0) 1572 return -1; 1573 curr_num = ev.num; 1574 1575 (void)history(h, &ev, H_FIRST); 1576 size = 0; 1577 do 1578 size += strlen(ev.str) * sizeof(*ev.str); 1579 while (history(h, &ev, H_NEXT) == 0); 1580 1581 /* get to the same position as before */ 1582 history(h, &ev, H_PREV_EVENT, curr_num); 1583 1584 return (int)size; 1585 } 1586 1587 1588 /* 1589 * sets the position in the history list to ``pos'' 1590 */ 1591 int 1592 history_set_pos(int pos) 1593 { 1594 HistEvent ev; 1595 int curr_num; 1596 1597 if (pos >= history_length || pos < 0) 1598 return -1; 1599 1600 (void)history(h, &ev, H_CURR); 1601 curr_num = ev.num; 1602 1603 /* 1604 * use H_DELDATA to set to nth history (without delete) by passing 1605 * (void **)-1 1606 */ 1607 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1608 (void)history(h, &ev, H_SET, curr_num); 1609 return -1; 1610 } 1611 return 0; 1612 } 1613 1614 1615 /* 1616 * returns previous event in history and shifts pointer accordingly 1617 */ 1618 HIST_ENTRY * 1619 previous_history(void) 1620 { 1621 1622 return _move_history(H_PREV); 1623 } 1624 1625 1626 /* 1627 * returns next event in history and shifts pointer accordingly 1628 */ 1629 HIST_ENTRY * 1630 next_history(void) 1631 { 1632 1633 return _move_history(H_NEXT); 1634 } 1635 1636 1637 /* 1638 * searches for first history event containing the str 1639 */ 1640 int 1641 history_search(const char *str, int direction) 1642 { 1643 HistEvent ev; 1644 const char *strp; 1645 int curr_num; 1646 1647 if (history(h, &ev, H_CURR) != 0) 1648 return -1; 1649 curr_num = ev.num; 1650 1651 for (;;) { 1652 if ((strp = strstr(ev.str, str)) != NULL) 1653 return (int)(strp - ev.str); 1654 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1655 break; 1656 } 1657 (void)history(h, &ev, H_SET, curr_num); 1658 return -1; 1659 } 1660 1661 1662 /* 1663 * searches for first history event beginning with str 1664 */ 1665 int 1666 history_search_prefix(const char *str, int direction) 1667 { 1668 HistEvent ev; 1669 1670 return (history(h, &ev, direction < 0 ? 1671 H_PREV_STR : H_NEXT_STR, str)); 1672 } 1673 1674 1675 /* 1676 * search for event in history containing str, starting at offset 1677 * abs(pos); continue backward, if pos<0, forward otherwise 1678 */ 1679 /* ARGSUSED */ 1680 int 1681 history_search_pos(const char *str, 1682 int direction __attribute__((__unused__)), int pos) 1683 { 1684 HistEvent ev; 1685 int curr_num, off; 1686 1687 off = (pos > 0) ? pos : -pos; 1688 pos = (pos > 0) ? 1 : -1; 1689 1690 if (history(h, &ev, H_CURR) != 0) 1691 return -1; 1692 curr_num = ev.num; 1693 1694 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1695 return -1; 1696 1697 for (;;) { 1698 if (strstr(ev.str, str)) 1699 return off; 1700 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1701 break; 1702 } 1703 1704 /* set "current" pointer back to previous state */ 1705 (void)history(h, &ev, 1706 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1707 1708 return -1; 1709 } 1710 1711 1712 /********************************/ 1713 /* completion functions */ 1714 1715 char * 1716 tilde_expand(char *name) 1717 { 1718 return fn_tilde_expand(name); 1719 } 1720 1721 char * 1722 filename_completion_function(const char *name, int state) 1723 { 1724 return fn_filename_completion_function(name, state); 1725 } 1726 1727 /* 1728 * a completion generator for usernames; returns _first_ username 1729 * which starts with supplied text 1730 * text contains a partial username preceded by random character 1731 * (usually '~'); state resets search from start (??? should we do that anyway) 1732 * it's the caller's responsibility to free the returned value 1733 */ 1734 char * 1735 username_completion_function(const char *text, int state) 1736 { 1737 struct passwd *pass = NULL; 1738 1739 if (text[0] == '\0') 1740 return NULL; 1741 1742 if (*text == '~') 1743 text++; 1744 1745 if (state == 0) 1746 setpwent(); 1747 1748 while ( 1749 (pass = getpwent()) != NULL 1750 && text[0] == pass->pw_name[0] 1751 && strcmp(text, pass->pw_name) == 0) 1752 continue; 1753 1754 if (pass == NULL) { 1755 endpwent(); 1756 return NULL; 1757 } 1758 return strdup(pass->pw_name); 1759 } 1760 1761 1762 /* 1763 * el-compatible wrapper to send TSTP on ^Z 1764 */ 1765 /* ARGSUSED */ 1766 static unsigned char 1767 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1768 { 1769 (void)kill(0, SIGTSTP); 1770 return CC_NORM; 1771 } 1772 1773 /* 1774 * Display list of strings in columnar format on readline's output stream. 1775 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1776 * 'max' is maximum length of string in 'matches'. 1777 */ 1778 void 1779 rl_display_match_list(char **matches, int len, int max) 1780 { 1781 1782 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1783 } 1784 1785 static const char * 1786 /*ARGSUSED*/ 1787 _rl_completion_append_character_function(const char *dummy 1788 __attribute__((__unused__))) 1789 { 1790 static char buf[2]; 1791 buf[0] = (char)rl_completion_append_character; 1792 buf[1] = '\0'; 1793 return buf; 1794 } 1795 1796 1797 /* 1798 * complete word at current point 1799 */ 1800 /* ARGSUSED */ 1801 int 1802 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1803 { 1804 #ifdef WIDECHAR 1805 static ct_buffer_t wbreak_conv, sprefix_conv; 1806 #endif 1807 char *breakchars; 1808 1809 if (h == NULL || e == NULL) 1810 rl_initialize(); 1811 1812 if (rl_inhibit_completion) { 1813 char arr[2]; 1814 arr[0] = (char)invoking_key; 1815 arr[1] = '\0'; 1816 el_insertstr(e, arr); 1817 return CC_REFRESH; 1818 } 1819 1820 if (rl_completion_word_break_hook != NULL) 1821 breakchars = (*rl_completion_word_break_hook)(); 1822 else 1823 breakchars = rl_basic_word_break_characters; 1824 1825 /* Just look at how many global variables modify this operation! */ 1826 return fn_complete(e, 1827 (CPFunction *)rl_completion_entry_function, 1828 rl_attempted_completion_function, 1829 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1830 ct_decode_string(breakchars, &sprefix_conv), 1831 _rl_completion_append_character_function, 1832 (size_t)rl_completion_query_items, 1833 &rl_completion_type, &rl_attempted_completion_over, 1834 &rl_point, &rl_end); 1835 1836 1837 } 1838 1839 1840 /* ARGSUSED */ 1841 static unsigned char 1842 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1843 { 1844 return (unsigned char)rl_complete(0, ch); 1845 } 1846 1847 /* 1848 * misc other functions 1849 */ 1850 1851 /* 1852 * bind key c to readline-type function func 1853 */ 1854 int 1855 rl_bind_key(int c, rl_command_func_t *func) 1856 { 1857 int retval = -1; 1858 1859 if (h == NULL || e == NULL) 1860 rl_initialize(); 1861 1862 if (func == rl_insert) { 1863 /* XXX notice there is no range checking of ``c'' */ 1864 e->el_map.key[c] = ED_INSERT; 1865 retval = 0; 1866 } 1867 return retval; 1868 } 1869 1870 1871 /* 1872 * read one key from input - handles chars pushed back 1873 * to input stream also 1874 */ 1875 int 1876 rl_read_key(void) 1877 { 1878 char fooarr[2 * sizeof(int)]; 1879 1880 if (e == NULL || h == NULL) 1881 rl_initialize(); 1882 1883 return el_getc(e, fooarr); 1884 } 1885 1886 1887 /* 1888 * reset the terminal 1889 */ 1890 /* ARGSUSED */ 1891 void 1892 rl_reset_terminal(const char *p __attribute__((__unused__))) 1893 { 1894 1895 if (h == NULL || e == NULL) 1896 rl_initialize(); 1897 el_reset(e); 1898 } 1899 1900 1901 /* 1902 * insert character ``c'' back into input stream, ``count'' times 1903 */ 1904 int 1905 rl_insert(int count, int c) 1906 { 1907 char arr[2]; 1908 1909 if (h == NULL || e == NULL) 1910 rl_initialize(); 1911 1912 /* XXX - int -> char conversion can lose on multichars */ 1913 arr[0] = (char)c; 1914 arr[1] = '\0'; 1915 1916 for (; count > 0; count--) 1917 el_push(e, arr); 1918 1919 return 0; 1920 } 1921 1922 int 1923 rl_insert_text(const char *text) 1924 { 1925 if (!text || *text == 0) 1926 return 0; 1927 1928 if (h == NULL || e == NULL) 1929 rl_initialize(); 1930 1931 if (el_insertstr(e, text) < 0) 1932 return 0; 1933 return (int)strlen(text); 1934 } 1935 1936 /*ARGSUSED*/ 1937 int 1938 rl_newline(int count __attribute__((__unused__)), 1939 int c __attribute__((__unused__))) 1940 { 1941 /* 1942 * Readline-4.0 appears to ignore the args. 1943 */ 1944 return rl_insert(1, '\n'); 1945 } 1946 1947 /*ARGSUSED*/ 1948 static unsigned char 1949 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1950 { 1951 if (map[c] == NULL) 1952 return CC_ERROR; 1953 1954 _rl_update_pos(); 1955 1956 (*map[c])(NULL, c); 1957 1958 /* If rl_done was set by the above call, deal with it here */ 1959 if (rl_done) 1960 return CC_EOF; 1961 1962 return CC_NORM; 1963 } 1964 1965 int 1966 rl_add_defun(const char *name, Function *fun, int c) 1967 { 1968 char dest[8]; 1969 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1970 return -1; 1971 map[(unsigned char)c] = fun; 1972 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1973 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1974 el_set(e, EL_BIND, dest, name, NULL); 1975 return 0; 1976 } 1977 1978 void 1979 rl_callback_read_char(void) 1980 { 1981 int count = 0, done = 0; 1982 const char *buf = el_gets(e, &count); 1983 char *wbuf; 1984 1985 if (buf == NULL || count-- <= 0) 1986 return; 1987 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1988 done = 1; 1989 if (buf[count] == '\n' || buf[count] == '\r') 1990 done = 2; 1991 1992 if (done && rl_linefunc != NULL) { 1993 el_set(e, EL_UNBUFFERED, 0); 1994 if (done == 2) { 1995 if ((wbuf = strdup(buf)) != NULL) 1996 wbuf[count] = '\0'; 1997 } else 1998 wbuf = NULL; 1999 (*(void (*)(const char *))rl_linefunc)(wbuf); 2000 el_set(e, EL_UNBUFFERED, 1); 2001 } 2002 } 2003 2004 void 2005 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 2006 { 2007 if (e == NULL) { 2008 rl_initialize(); 2009 } 2010 (void)rl_set_prompt(prompt); 2011 rl_linefunc = linefunc; 2012 el_set(e, EL_UNBUFFERED, 1); 2013 } 2014 2015 void 2016 rl_callback_handler_remove(void) 2017 { 2018 el_set(e, EL_UNBUFFERED, 0); 2019 rl_linefunc = NULL; 2020 } 2021 2022 void 2023 rl_redisplay(void) 2024 { 2025 char a[2]; 2026 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2027 a[1] = '\0'; 2028 el_push(e, a); 2029 } 2030 2031 int 2032 rl_get_previous_history(int count, int key) 2033 { 2034 char a[2]; 2035 a[0] = (char)key; 2036 a[1] = '\0'; 2037 while (count--) 2038 el_push(e, a); 2039 return 0; 2040 } 2041 2042 void 2043 /*ARGSUSED*/ 2044 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2045 { 2046 el_set(e, EL_PREP_TERM, 1); 2047 } 2048 2049 void 2050 rl_deprep_terminal(void) 2051 { 2052 el_set(e, EL_PREP_TERM, 0); 2053 } 2054 2055 int 2056 rl_read_init_file(const char *s) 2057 { 2058 return el_source(e, s); 2059 } 2060 2061 int 2062 rl_parse_and_bind(const char *line) 2063 { 2064 const char **argv; 2065 int argc; 2066 Tokenizer *tok; 2067 2068 tok = tok_init(NULL); 2069 tok_str(tok, line, &argc, &argv); 2070 argc = el_parse(e, argc, argv); 2071 tok_end(tok); 2072 return argc ? 1 : 0; 2073 } 2074 2075 int 2076 rl_variable_bind(const char *var, const char *value) 2077 { 2078 /* 2079 * The proper return value is undocument, but this is what the 2080 * readline source seems to do. 2081 */ 2082 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2083 } 2084 2085 void 2086 rl_stuff_char(int c) 2087 { 2088 char buf[2]; 2089 2090 buf[0] = (char)c; 2091 buf[1] = '\0'; 2092 el_insertstr(e, buf); 2093 } 2094 2095 static int 2096 _rl_event_read_char(EditLine *el, char *cp) 2097 { 2098 int n; 2099 ssize_t num_read = 0; 2100 2101 *cp = '\0'; 2102 while (rl_event_hook) { 2103 2104 (*rl_event_hook)(); 2105 2106 #if defined(FIONREAD) 2107 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2108 return -1; 2109 if (n) 2110 num_read = read(el->el_infd, cp, (size_t)1); 2111 else 2112 num_read = 0; 2113 #elif defined(F_SETFL) && defined(O_NDELAY) 2114 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2115 return -1; 2116 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2117 return -1; 2118 num_read = read(el->el_infd, cp, 1); 2119 if (fcntl(el->el_infd, F_SETFL, n)) 2120 return -1; 2121 #else 2122 /* not non-blocking, but what you gonna do? */ 2123 num_read = read(el->el_infd, cp, 1); 2124 return -1; 2125 #endif 2126 2127 if (num_read < 0 && errno == EAGAIN) 2128 continue; 2129 if (num_read == 0) 2130 continue; 2131 break; 2132 } 2133 if (!rl_event_hook) 2134 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2135 return (int)num_read; 2136 } 2137 2138 static void 2139 _rl_update_pos(void) 2140 { 2141 const LineInfo *li = el_line(e); 2142 2143 rl_point = (int)(li->cursor - li->buffer); 2144 rl_end = (int)(li->lastchar - li->buffer); 2145 } 2146 2147 void 2148 rl_get_screen_size(int *rows, int *cols) 2149 { 2150 if (rows) 2151 el_get(e, EL_GETTC, "li", rows, (void *)0); 2152 if (cols) 2153 el_get(e, EL_GETTC, "co", cols, (void *)0); 2154 } 2155 2156 void 2157 rl_set_screen_size(int rows, int cols) 2158 { 2159 char buf[64]; 2160 (void)snprintf(buf, sizeof(buf), "%d", rows); 2161 el_set(e, EL_SETTC, "li", buf, NULL); 2162 (void)snprintf(buf, sizeof(buf), "%d", cols); 2163 el_set(e, EL_SETTC, "co", buf, NULL); 2164 } 2165 2166 char ** 2167 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2168 { 2169 size_t len, max, i, j, min; 2170 char **list, *match, *a, *b; 2171 2172 len = 1; 2173 max = 10; 2174 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2175 return NULL; 2176 2177 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2178 list[len++] = match; 2179 if (len == max) { 2180 char **nl; 2181 max += 10; 2182 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2183 goto out; 2184 list = nl; 2185 } 2186 } 2187 if (len == 1) 2188 goto out; 2189 list[len] = NULL; 2190 if (len == 2) { 2191 if ((list[0] = strdup(list[1])) == NULL) 2192 goto out; 2193 return list; 2194 } 2195 qsort(&list[1], len - 1, sizeof(*list), 2196 (int (*)(const void *, const void *)) strcmp); 2197 min = SIZE_T_MAX; 2198 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2199 b = list[i + 1]; 2200 for (j = 0; a[j] && a[j] == b[j]; j++) 2201 continue; 2202 if (min > j) 2203 min = j; 2204 } 2205 if (min == 0 && *str) { 2206 if ((list[0] = strdup(str)) == NULL) 2207 goto out; 2208 } else { 2209 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2210 goto out; 2211 (void)memcpy(list[0], list[1], min); 2212 list[0][min] = '\0'; 2213 } 2214 return list; 2215 2216 out: 2217 el_free(list); 2218 return NULL; 2219 } 2220 2221 char * 2222 rl_filename_completion_function (const char *text, int state) 2223 { 2224 return fn_filename_completion_function(text, state); 2225 } 2226 2227 void 2228 rl_forced_update_display(void) 2229 { 2230 el_set(e, EL_REFRESH); 2231 } 2232 2233 int 2234 _rl_abort_internal(void) 2235 { 2236 el_beep(e); 2237 longjmp(topbuf, 1); 2238 /*NOTREACHED*/ 2239 } 2240 2241 int 2242 _rl_qsort_string_compare(char **s1, char **s2) 2243 { 2244 return strcoll(*s1, *s2); 2245 } 2246 2247 HISTORY_STATE * 2248 history_get_history_state(void) 2249 { 2250 HISTORY_STATE *hs; 2251 2252 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2253 return NULL; 2254 hs->length = history_length; 2255 return hs; 2256 } 2257 2258 int 2259 /*ARGSUSED*/ 2260 rl_kill_text(int from __attribute__((__unused__)), 2261 int to __attribute__((__unused__))) 2262 { 2263 return 0; 2264 } 2265 2266 Keymap 2267 rl_make_bare_keymap(void) 2268 { 2269 return NULL; 2270 } 2271 2272 Keymap 2273 rl_get_keymap(void) 2274 { 2275 return NULL; 2276 } 2277 2278 void 2279 /*ARGSUSED*/ 2280 rl_set_keymap(Keymap k __attribute__((__unused__))) 2281 { 2282 } 2283 2284 int 2285 /*ARGSUSED*/ 2286 rl_generic_bind(int type __attribute__((__unused__)), 2287 const char * keyseq __attribute__((__unused__)), 2288 const char * data __attribute__((__unused__)), 2289 Keymap k __attribute__((__unused__))) 2290 { 2291 return 0; 2292 } 2293 2294 int 2295 /*ARGSUSED*/ 2296 rl_bind_key_in_map(int key __attribute__((__unused__)), 2297 rl_command_func_t *fun __attribute__((__unused__)), 2298 Keymap k __attribute__((__unused__))) 2299 { 2300 return 0; 2301 } 2302 2303 /* unsupported, but needed by python */ 2304 void 2305 rl_cleanup_after_signal(void) 2306 { 2307 } 2308 2309 int 2310 rl_on_new_line(void) 2311 { 2312 return 0; 2313 } 2314 2315 void 2316 rl_free_line_state(void) 2317 { 2318 } 2319