readline.c revision 1.136
1 /* $NetBSD: readline.c,v 1.136 2016/06/02 21:40:51 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 1.136 2016/06/02 21:40:51 christos Exp $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <vis.h> 52 53 #include "readline/readline.h" 54 #include "el.h" 55 #include "fcns.h" 56 #include "filecomplete.h" 57 58 void rl_prep_terminal(int); 59 void rl_deprep_terminal(void); 60 61 /* for rl_complete() */ 62 #define TAB '\r' 63 64 /* see comment at the #ifdef for sense of this */ 65 /* #define GDB_411_HACK */ 66 67 /* readline compatibility stuff - look at readline sources/documentation */ 68 /* to see what these variables mean */ 69 const char *rl_library_version = "EditLine wrapper"; 70 int rl_readline_version = RL_READLINE_VERSION; 71 static char empty[] = { '\0' }; 72 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 73 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 74 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 75 char *rl_readline_name = empty; 76 FILE *rl_instream = NULL; 77 FILE *rl_outstream = NULL; 78 int rl_point = 0; 79 int rl_end = 0; 80 char *rl_line_buffer = NULL; 81 rl_vcpfunc_t *rl_linefunc = NULL; 82 int rl_done = 0; 83 VFunction *rl_event_hook = NULL; 84 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 85 emacs_meta_keymap, 86 emacs_ctlx_keymap; 87 /* 88 * The following is not implemented; we always catch signals in the 89 * libedit fashion: set handlers on entry to el_gets() and clear them 90 * on the way out. This simplistic approach works for most cases; if 91 * it does not work for your application, please let us know. 92 */ 93 int rl_catch_signals = 1; 94 int rl_catch_sigwinch = 1; 95 96 int history_base = 1; /* probably never subject to change */ 97 int history_length = 0; 98 int 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 /* 160 * When the history cursor is on the newest element and next_history() 161 * is called, GNU readline moves the cursor beyond the newest element. 162 * The editline library does not provide data structures to express 163 * that state, so we need a local flag. 164 */ 165 static int current_history_valid = 1; 166 167 /* stuff below is used internally by libedit for readline emulation */ 168 169 static History *h = NULL; 170 static EditLine *e = NULL; 171 static rl_command_func_t *map[256]; 172 static jmp_buf topbuf; 173 174 /* internal functions */ 175 static unsigned char _el_rl_complete(EditLine *, int); 176 static unsigned char _el_rl_tstp(EditLine *, int); 177 static char *_get_prompt(EditLine *); 178 static int _getc_function(EditLine *, wchar_t *); 179 static HIST_ENTRY *_move_history(int); 180 static int _history_expand_command(const char *, size_t, size_t, 181 char **); 182 static char *_rl_compat_sub(const char *, const char *, 183 const char *, int); 184 static int _rl_event_read_char(EditLine *, wchar_t *); 185 static void _rl_update_pos(void); 186 187 188 /* ARGSUSED */ 189 static char * 190 _get_prompt(EditLine *el __attribute__((__unused__))) 191 { 192 rl_already_prompted = 1; 193 return rl_prompt; 194 } 195 196 197 /* 198 * generic function for moving around history 199 */ 200 static HIST_ENTRY * 201 _move_history(int op) 202 { 203 HistEvent ev; 204 static HIST_ENTRY rl_he; 205 206 if (history(h, &ev, op) != 0) 207 return NULL; 208 209 rl_he.line = ev.str; 210 rl_he.data = NULL; 211 212 return &rl_he; 213 } 214 215 216 /* 217 * read one key from user defined input function 218 */ 219 static int 220 /*ARGSUSED*/ 221 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 222 { 223 int i; 224 225 i = (*rl_getc_function)(NULL); 226 if (i == -1) 227 return 0; 228 *c = (wchar_t)i; 229 return 1; 230 } 231 232 static void 233 _resize_fun(EditLine *el, void *a) 234 { 235 const LineInfo *li; 236 char **ap = a; 237 238 li = el_line(el); 239 /* a cheesy way to get rid of const cast. */ 240 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 241 } 242 243 static const char * 244 _default_history_file(void) 245 { 246 struct passwd *p; 247 static char *path; 248 size_t len; 249 250 if (path) 251 return path; 252 253 if ((p = getpwuid(getuid())) == NULL) 254 return NULL; 255 256 len = strlen(p->pw_dir) + sizeof("/.history"); 257 if ((path = malloc(len)) == NULL) 258 return NULL; 259 260 (void)snprintf(path, len, "%s/.history", p->pw_dir); 261 return path; 262 } 263 264 /* 265 * READLINE compatibility stuff 266 */ 267 268 /* 269 * Set the prompt 270 */ 271 int 272 rl_set_prompt(const char *prompt) 273 { 274 char *p; 275 276 if (!prompt) 277 prompt = ""; 278 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 279 return 0; 280 if (rl_prompt) 281 el_free(rl_prompt); 282 rl_prompt = strdup(prompt); 283 if (rl_prompt == NULL) 284 return -1; 285 286 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 287 *p = RL_PROMPT_START_IGNORE; 288 289 return 0; 290 } 291 292 /* 293 * initialize rl compat stuff 294 */ 295 int 296 rl_initialize(void) 297 { 298 HistEvent ev; 299 int editmode = 1; 300 struct termios t; 301 302 current_history_valid = 1; 303 304 if (e != NULL) 305 el_end(e); 306 if (h != NULL) 307 history_end(h); 308 309 if (!rl_instream) 310 rl_instream = stdin; 311 if (!rl_outstream) 312 rl_outstream = stdout; 313 314 /* 315 * See if we don't really want to run the editor 316 */ 317 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 318 editmode = 0; 319 320 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 321 322 if (!editmode) 323 el_set(e, EL_EDITMODE, 0); 324 325 h = history_init(); 326 if (!e || !h) 327 return -1; 328 329 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 330 history_length = 0; 331 max_input_history = INT_MAX; 332 el_set(e, EL_HIST, history, h); 333 334 /* Setup resize function */ 335 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 336 337 /* setup getc function if valid */ 338 if (rl_getc_function) 339 el_set(e, EL_GETCFN, _getc_function); 340 341 /* for proper prompt printing in readline() */ 342 if (rl_set_prompt("") == -1) { 343 history_end(h); 344 el_end(e); 345 return -1; 346 } 347 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 348 el_set(e, EL_SIGNAL, rl_catch_signals); 349 350 /* set default mode to "emacs"-style and read setting afterwards */ 351 /* so this can be overridden */ 352 el_set(e, EL_EDITOR, "emacs"); 353 if (rl_terminal_name != NULL) 354 el_set(e, EL_TERMINAL, rl_terminal_name); 355 else 356 el_get(e, EL_TERMINAL, &rl_terminal_name); 357 358 /* 359 * Word completion - this has to go AFTER rebinding keys 360 * to emacs-style. 361 */ 362 el_set(e, EL_ADDFN, "rl_complete", 363 "ReadLine compatible completion function", 364 _el_rl_complete); 365 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 366 367 /* 368 * Send TSTP when ^Z is pressed. 369 */ 370 el_set(e, EL_ADDFN, "rl_tstp", 371 "ReadLine compatible suspend function", 372 _el_rl_tstp); 373 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 374 375 /* 376 * Set some readline compatible key-bindings. 377 */ 378 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 379 380 /* 381 * Allow the use of Home/End keys. 382 */ 383 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 384 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 385 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 386 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 387 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 388 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 389 390 /* 391 * Allow the use of the Delete/Insert keys. 392 */ 393 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 394 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 395 396 /* 397 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 398 */ 399 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 400 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 401 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 402 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 403 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 404 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 405 406 /* read settings from configuration file */ 407 el_source(e, NULL); 408 409 /* 410 * Unfortunately, some applications really do use rl_point 411 * and rl_line_buffer directly. 412 */ 413 _resize_fun(e, &rl_line_buffer); 414 _rl_update_pos(); 415 416 if (rl_startup_hook) 417 (*rl_startup_hook)(NULL, 0); 418 419 return 0; 420 } 421 422 423 /* 424 * read one line from input stream and return it, chomping 425 * trailing newline (if there is any) 426 */ 427 char * 428 readline(const char *p) 429 { 430 HistEvent ev; 431 const char * volatile prompt = p; 432 int count; 433 const char *ret; 434 char *buf; 435 static int used_event_hook; 436 437 if (e == NULL || h == NULL) 438 rl_initialize(); 439 440 rl_done = 0; 441 442 (void)setjmp(topbuf); 443 444 /* update prompt accordingly to what has been passed */ 445 if (rl_set_prompt(prompt) == -1) 446 return NULL; 447 448 if (rl_pre_input_hook) 449 (*rl_pre_input_hook)(NULL, 0); 450 451 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 452 el_set(e, EL_GETCFN, _rl_event_read_char); 453 used_event_hook = 1; 454 } 455 456 if (!rl_event_hook && used_event_hook) { 457 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 458 used_event_hook = 0; 459 } 460 461 rl_already_prompted = 0; 462 463 /* get one line from input stream */ 464 ret = el_gets(e, &count); 465 466 if (ret && count > 0) { 467 int lastidx; 468 469 buf = strdup(ret); 470 if (buf == NULL) 471 return NULL; 472 lastidx = count - 1; 473 if (buf[lastidx] == '\n') 474 buf[lastidx] = '\0'; 475 } else 476 buf = NULL; 477 478 history(h, &ev, H_GETSIZE); 479 history_length = ev.num; 480 481 return buf; 482 } 483 484 /* 485 * history functions 486 */ 487 488 /* 489 * is normally called before application starts to use 490 * history expansion functions 491 */ 492 void 493 using_history(void) 494 { 495 if (h == NULL || e == NULL) 496 rl_initialize(); 497 } 498 499 500 /* 501 * substitute ``what'' with ``with'', returning resulting string; if 502 * globally == 1, substitutes all occurrences of what, otherwise only the 503 * first one 504 */ 505 static char * 506 _rl_compat_sub(const char *str, const char *what, const char *with, 507 int globally) 508 { 509 const char *s; 510 char *r, *result; 511 size_t len, with_len, what_len; 512 513 len = strlen(str); 514 with_len = strlen(with); 515 what_len = strlen(what); 516 517 /* calculate length we need for result */ 518 s = str; 519 while (*s) { 520 if (*s == *what && !strncmp(s, what, what_len)) { 521 len += with_len - what_len; 522 if (!globally) 523 break; 524 s += what_len; 525 } else 526 s++; 527 } 528 r = result = el_malloc((len + 1) * sizeof(*r)); 529 if (result == NULL) 530 return NULL; 531 s = str; 532 while (*s) { 533 if (*s == *what && !strncmp(s, what, what_len)) { 534 (void)strncpy(r, with, with_len); 535 r += with_len; 536 s += what_len; 537 if (!globally) { 538 (void)strcpy(r, s); 539 return result; 540 } 541 } else 542 *r++ = *s++; 543 } 544 *r = '\0'; 545 return result; 546 } 547 548 static char *last_search_pat; /* last !?pat[?] search pattern */ 549 static char *last_search_match; /* last !?pat[?] that matched */ 550 551 const char * 552 get_history_event(const char *cmd, int *cindex, int qchar) 553 { 554 int idx, sign, sub, num, begin, ret; 555 size_t len; 556 char *pat; 557 const char *rptr; 558 HistEvent ev; 559 560 idx = *cindex; 561 if (cmd[idx++] != history_expansion_char) 562 return NULL; 563 564 /* find out which event to take */ 565 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 566 if (history(h, &ev, H_FIRST) != 0) 567 return NULL; 568 *cindex = cmd[idx]? (idx + 1):idx; 569 return ev.str; 570 } 571 sign = 0; 572 if (cmd[idx] == '-') { 573 sign = 1; 574 idx++; 575 } 576 577 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 578 HIST_ENTRY *rl_he; 579 580 num = 0; 581 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 582 num = num * 10 + cmd[idx] - '0'; 583 idx++; 584 } 585 if (sign) 586 num = history_length - num + 1; 587 588 if (!(rl_he = history_get(num))) 589 return NULL; 590 591 *cindex = idx; 592 return rl_he->line; 593 } 594 sub = 0; 595 if (cmd[idx] == '?') { 596 sub = 1; 597 idx++; 598 } 599 begin = idx; 600 while (cmd[idx]) { 601 if (cmd[idx] == '\n') 602 break; 603 if (sub && cmd[idx] == '?') 604 break; 605 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 606 || cmd[idx] == '\t' || cmd[idx] == qchar)) 607 break; 608 idx++; 609 } 610 len = (size_t)idx - (size_t)begin; 611 if (sub && cmd[idx] == '?') 612 idx++; 613 if (sub && len == 0 && last_search_pat && *last_search_pat) 614 pat = last_search_pat; 615 else if (len == 0) 616 return NULL; 617 else { 618 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 619 return NULL; 620 (void)strncpy(pat, cmd + begin, len); 621 pat[len] = '\0'; 622 } 623 624 if (history(h, &ev, H_CURR) != 0) { 625 if (pat != last_search_pat) 626 el_free(pat); 627 return NULL; 628 } 629 num = ev.num; 630 631 if (sub) { 632 if (pat != last_search_pat) { 633 if (last_search_pat) 634 el_free(last_search_pat); 635 last_search_pat = pat; 636 } 637 ret = history_search(pat, -1); 638 } else 639 ret = history_search_prefix(pat, -1); 640 641 if (ret == -1) { 642 /* restore to end of list on failed search */ 643 history(h, &ev, H_FIRST); 644 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 645 if (pat != last_search_pat) 646 el_free(pat); 647 return NULL; 648 } 649 650 if (sub && len) { 651 if (last_search_match && last_search_match != pat) 652 el_free(last_search_match); 653 last_search_match = pat; 654 } 655 656 if (pat != last_search_pat) 657 el_free(pat); 658 659 if (history(h, &ev, H_CURR) != 0) 660 return NULL; 661 *cindex = idx; 662 rptr = ev.str; 663 664 /* roll back to original position */ 665 (void)history(h, &ev, H_SET, num); 666 667 return rptr; 668 } 669 670 /* 671 * the real function doing history expansion - takes as argument command 672 * to do and data upon which the command should be executed 673 * does expansion the way I've understood readline documentation 674 * 675 * returns 0 if data was not modified, 1 if it was and 2 if the string 676 * should be only printed and not executed; in case of error, 677 * returns -1 and *result points to NULL 678 * it's the caller's responsibility to free() the string returned in *result 679 */ 680 static int 681 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 682 char **result) 683 { 684 char *tmp, *search = NULL, *aptr; 685 const char *ptr, *cmd; 686 static char *from = NULL, *to = NULL; 687 int start, end, idx, has_mods = 0; 688 int p_on = 0, g_on = 0; 689 690 *result = NULL; 691 aptr = NULL; 692 ptr = NULL; 693 694 /* First get event specifier */ 695 idx = 0; 696 697 if (strchr(":^*$", command[offs + 1])) { 698 char str[4]; 699 /* 700 * "!:" is shorthand for "!!:". 701 * "!^", "!*" and "!$" are shorthand for 702 * "!!:^", "!!:*" and "!!:$" respectively. 703 */ 704 str[0] = str[1] = '!'; 705 str[2] = '0'; 706 ptr = get_history_event(str, &idx, 0); 707 idx = (command[offs + 1] == ':')? 1:0; 708 has_mods = 1; 709 } else { 710 if (command[offs + 1] == '#') { 711 /* use command so far */ 712 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 713 == NULL) 714 return -1; 715 (void)strncpy(aptr, command, offs); 716 aptr[offs] = '\0'; 717 idx = 1; 718 } else { 719 int qchar; 720 721 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 722 ptr = get_history_event(command + offs, &idx, qchar); 723 } 724 has_mods = command[offs + (size_t)idx] == ':'; 725 } 726 727 if (ptr == NULL && aptr == NULL) 728 return -1; 729 730 if (!has_mods) { 731 *result = strdup(aptr ? aptr : ptr); 732 if (aptr) 733 el_free(aptr); 734 if (*result == NULL) 735 return -1; 736 return 1; 737 } 738 739 cmd = command + offs + idx + 1; 740 741 /* Now parse any word designators */ 742 743 if (*cmd == '%') /* last word matched by ?pat? */ 744 tmp = strdup(last_search_match? last_search_match:""); 745 else if (strchr("^*$-0123456789", *cmd)) { 746 start = end = -1; 747 if (*cmd == '^') 748 start = end = 1, cmd++; 749 else if (*cmd == '$') 750 start = -1, cmd++; 751 else if (*cmd == '*') 752 start = 1, cmd++; 753 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 754 start = 0; 755 while (*cmd && '0' <= *cmd && *cmd <= '9') 756 start = start * 10 + *cmd++ - '0'; 757 758 if (*cmd == '-') { 759 if (isdigit((unsigned char) cmd[1])) { 760 cmd++; 761 end = 0; 762 while (*cmd && '0' <= *cmd && *cmd <= '9') 763 end = end * 10 + *cmd++ - '0'; 764 } else if (cmd[1] == '$') { 765 cmd += 2; 766 end = -1; 767 } else { 768 cmd++; 769 end = -2; 770 } 771 } else if (*cmd == '*') 772 end = -1, cmd++; 773 else 774 end = start; 775 } 776 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 777 if (tmp == NULL) { 778 (void)fprintf(rl_outstream, "%s: Bad word specifier", 779 command + offs + idx); 780 if (aptr) 781 el_free(aptr); 782 return -1; 783 } 784 } else 785 tmp = strdup(aptr? aptr:ptr); 786 787 if (aptr) 788 el_free(aptr); 789 790 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 791 *result = tmp; 792 return 1; 793 } 794 795 for (; *cmd; cmd++) { 796 if (*cmd == ':') 797 continue; 798 else if (*cmd == 'h') { /* remove trailing path */ 799 if ((aptr = strrchr(tmp, '/')) != NULL) 800 *aptr = '\0'; 801 } else if (*cmd == 't') { /* remove leading path */ 802 if ((aptr = strrchr(tmp, '/')) != NULL) { 803 aptr = strdup(aptr + 1); 804 el_free(tmp); 805 tmp = aptr; 806 } 807 } else if (*cmd == 'r') { /* remove trailing suffix */ 808 if ((aptr = strrchr(tmp, '.')) != NULL) 809 *aptr = '\0'; 810 } else if (*cmd == 'e') { /* remove all but suffix */ 811 if ((aptr = strrchr(tmp, '.')) != NULL) { 812 aptr = strdup(aptr); 813 el_free(tmp); 814 tmp = aptr; 815 } 816 } else if (*cmd == 'p') /* print only */ 817 p_on = 1; 818 else if (*cmd == 'g') 819 g_on = 2; 820 else if (*cmd == 's' || *cmd == '&') { 821 char *what, *with, delim; 822 size_t len, from_len; 823 size_t size; 824 825 if (*cmd == '&' && (from == NULL || to == NULL)) 826 continue; 827 else if (*cmd == 's') { 828 delim = *(++cmd), cmd++; 829 size = 16; 830 what = el_realloc(from, size * sizeof(*what)); 831 if (what == NULL) { 832 el_free(from); 833 el_free(tmp); 834 return 0; 835 } 836 len = 0; 837 for (; *cmd && *cmd != delim; cmd++) { 838 if (*cmd == '\\' && cmd[1] == delim) 839 cmd++; 840 if (len >= size) { 841 char *nwhat; 842 nwhat = el_realloc(what, 843 (size <<= 1) * 844 sizeof(*nwhat)); 845 if (nwhat == NULL) { 846 el_free(what); 847 el_free(tmp); 848 return 0; 849 } 850 what = nwhat; 851 } 852 what[len++] = *cmd; 853 } 854 what[len] = '\0'; 855 from = what; 856 if (*what == '\0') { 857 el_free(what); 858 if (search) { 859 from = strdup(search); 860 if (from == NULL) { 861 el_free(tmp); 862 return 0; 863 } 864 } else { 865 from = NULL; 866 el_free(tmp); 867 return -1; 868 } 869 } 870 cmd++; /* shift after delim */ 871 if (!*cmd) 872 continue; 873 874 size = 16; 875 with = el_realloc(to, size * sizeof(*with)); 876 if (with == NULL) { 877 el_free(to); 878 el_free(tmp); 879 return -1; 880 } 881 len = 0; 882 from_len = strlen(from); 883 for (; *cmd && *cmd != delim; cmd++) { 884 if (len + from_len + 1 >= size) { 885 char *nwith; 886 size += from_len + 1; 887 nwith = el_realloc(with, 888 size * sizeof(*nwith)); 889 if (nwith == NULL) { 890 el_free(with); 891 el_free(tmp); 892 return -1; 893 } 894 with = nwith; 895 } 896 if (*cmd == '&') { 897 /* safe */ 898 (void)strcpy(&with[len], from); 899 len += from_len; 900 continue; 901 } 902 if (*cmd == '\\' 903 && (*(cmd + 1) == delim 904 || *(cmd + 1) == '&')) 905 cmd++; 906 with[len++] = *cmd; 907 } 908 with[len] = '\0'; 909 to = with; 910 } 911 912 aptr = _rl_compat_sub(tmp, from, to, g_on); 913 if (aptr) { 914 el_free(tmp); 915 tmp = aptr; 916 } 917 g_on = 0; 918 } 919 } 920 *result = tmp; 921 return p_on? 2:1; 922 } 923 924 925 /* 926 * csh-style history expansion 927 */ 928 int 929 history_expand(char *str, char **output) 930 { 931 int ret = 0; 932 size_t idx, i, size; 933 char *tmp, *result; 934 935 if (h == NULL || e == NULL) 936 rl_initialize(); 937 938 if (history_expansion_char == 0) { 939 *output = strdup(str); 940 return 0; 941 } 942 943 *output = NULL; 944 if (str[0] == history_subst_char) { 945 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 946 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 947 if (*output == NULL) 948 return 0; 949 (*output)[0] = (*output)[1] = history_expansion_char; 950 (*output)[2] = ':'; 951 (*output)[3] = 's'; 952 (void)strcpy((*output) + 4, str); 953 str = *output; 954 } else { 955 *output = strdup(str); 956 if (*output == NULL) 957 return 0; 958 } 959 960 #define ADD_STRING(what, len, fr) \ 961 { \ 962 if (idx + len + 1 > size) { \ 963 char *nresult = el_realloc(result, \ 964 (size += len + 1) * sizeof(*nresult)); \ 965 if (nresult == NULL) { \ 966 el_free(*output); \ 967 if (/*CONSTCOND*/fr) \ 968 el_free(tmp); \ 969 return 0; \ 970 } \ 971 result = nresult; \ 972 } \ 973 (void)strncpy(&result[idx], what, len); \ 974 idx += len; \ 975 result[idx] = '\0'; \ 976 } 977 978 result = NULL; 979 size = idx = 0; 980 tmp = NULL; 981 for (i = 0; str[i];) { 982 int qchar, loop_again; 983 size_t len, start, j; 984 985 qchar = 0; 986 loop_again = 1; 987 start = j = i; 988 loop: 989 for (; str[j]; j++) { 990 if (str[j] == '\\' && 991 str[j + 1] == history_expansion_char) { 992 len = strlen(&str[j + 1]) + 1; 993 memmove(&str[j], &str[j + 1], len); 994 continue; 995 } 996 if (!loop_again) { 997 if (isspace((unsigned char) str[j]) 998 || str[j] == qchar) 999 break; 1000 } 1001 if (str[j] == history_expansion_char 1002 && !strchr(history_no_expand_chars, str[j + 1]) 1003 && (!history_inhibit_expansion_function || 1004 (*history_inhibit_expansion_function)(str, 1005 (int)j) == 0)) 1006 break; 1007 } 1008 1009 if (str[j] && loop_again) { 1010 i = j; 1011 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1012 j++; 1013 if (str[j] == history_expansion_char) 1014 j++; 1015 loop_again = 0; 1016 goto loop; 1017 } 1018 len = i - start; 1019 ADD_STRING(&str[start], len, 0); 1020 1021 if (str[i] == '\0' || str[i] != history_expansion_char) { 1022 len = j - i; 1023 ADD_STRING(&str[i], len, 0); 1024 if (start == 0) 1025 ret = 0; 1026 else 1027 ret = 1; 1028 break; 1029 } 1030 ret = _history_expand_command (str, i, (j - i), &tmp); 1031 if (ret > 0 && tmp) { 1032 len = strlen(tmp); 1033 ADD_STRING(tmp, len, 1); 1034 } 1035 if (tmp) { 1036 el_free(tmp); 1037 tmp = NULL; 1038 } 1039 i = j; 1040 } 1041 1042 /* ret is 2 for "print only" option */ 1043 if (ret == 2) { 1044 add_history(result); 1045 #ifdef GDB_411_HACK 1046 /* gdb 4.11 has been shipped with readline, where */ 1047 /* history_expand() returned -1 when the line */ 1048 /* should not be executed; in readline 2.1+ */ 1049 /* it should return 2 in such a case */ 1050 ret = -1; 1051 #endif 1052 } 1053 el_free(*output); 1054 *output = result; 1055 1056 return ret; 1057 } 1058 1059 /* 1060 * Return a string consisting of arguments of "str" from "start" to "end". 1061 */ 1062 char * 1063 history_arg_extract(int start, int end, const char *str) 1064 { 1065 size_t i, len, max; 1066 char **arr, *result = NULL; 1067 1068 arr = history_tokenize(str); 1069 if (!arr) 1070 return NULL; 1071 if (arr && *arr == NULL) 1072 goto out; 1073 1074 for (max = 0; arr[max]; max++) 1075 continue; 1076 max--; 1077 1078 if (start == '$') 1079 start = (int)max; 1080 if (end == '$') 1081 end = (int)max; 1082 if (end < 0) 1083 end = (int)max + end + 1; 1084 if (start < 0) 1085 start = end; 1086 1087 if (start < 0 || end < 0 || (size_t)start > max || 1088 (size_t)end > max || start > end) 1089 goto out; 1090 1091 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1092 len += strlen(arr[i]) + 1; 1093 len++; 1094 result = el_malloc(len * sizeof(*result)); 1095 if (result == NULL) 1096 goto out; 1097 1098 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1099 (void)strcpy(result + len, arr[i]); 1100 len += strlen(arr[i]); 1101 if (i < (size_t)end) 1102 result[len++] = ' '; 1103 } 1104 result[len] = '\0'; 1105 1106 out: 1107 for (i = 0; arr[i]; i++) 1108 el_free(arr[i]); 1109 el_free(arr); 1110 1111 return result; 1112 } 1113 1114 /* 1115 * Parse the string into individual tokens, 1116 * similar to how shell would do it. 1117 */ 1118 char ** 1119 history_tokenize(const char *str) 1120 { 1121 int size = 1, idx = 0, i, start; 1122 size_t len; 1123 char **result = NULL, *temp, delim = '\0'; 1124 1125 for (i = 0; str[i];) { 1126 while (isspace((unsigned char) str[i])) 1127 i++; 1128 start = i; 1129 for (; str[i];) { 1130 if (str[i] == '\\') { 1131 if (str[i+1] != '\0') 1132 i++; 1133 } else if (str[i] == delim) 1134 delim = '\0'; 1135 else if (!delim && 1136 (isspace((unsigned char) str[i]) || 1137 strchr("()<>;&|$", str[i]))) 1138 break; 1139 else if (!delim && strchr("'`\"", str[i])) 1140 delim = str[i]; 1141 if (str[i]) 1142 i++; 1143 } 1144 1145 if (idx + 2 >= size) { 1146 char **nresult; 1147 size <<= 1; 1148 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1149 if (nresult == NULL) { 1150 el_free(result); 1151 return NULL; 1152 } 1153 result = nresult; 1154 } 1155 len = (size_t)i - (size_t)start; 1156 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1157 if (temp == NULL) { 1158 for (i = 0; i < idx; i++) 1159 el_free(result[i]); 1160 el_free(result); 1161 return NULL; 1162 } 1163 (void)strncpy(temp, &str[start], len); 1164 temp[len] = '\0'; 1165 result[idx++] = temp; 1166 result[idx] = NULL; 1167 if (str[i]) 1168 i++; 1169 } 1170 return result; 1171 } 1172 1173 1174 /* 1175 * limit size of history record to ``max'' events 1176 */ 1177 void 1178 stifle_history(int max) 1179 { 1180 HistEvent ev; 1181 HIST_ENTRY *he; 1182 1183 if (h == NULL || e == NULL) 1184 rl_initialize(); 1185 1186 if (history(h, &ev, H_SETSIZE, max) == 0) { 1187 max_input_history = max; 1188 if (history_length > max) 1189 history_base = history_length - max; 1190 while (history_length > max) { 1191 he = remove_history(0); 1192 el_free(he->data); 1193 el_free((void *)(unsigned long)he->line); 1194 el_free(he); 1195 } 1196 } 1197 } 1198 1199 1200 /* 1201 * "unlimit" size of history - set the limit to maximum allowed int value 1202 */ 1203 int 1204 unstifle_history(void) 1205 { 1206 HistEvent ev; 1207 int omax; 1208 1209 history(h, &ev, H_SETSIZE, INT_MAX); 1210 omax = max_input_history; 1211 max_input_history = INT_MAX; 1212 return omax; /* some value _must_ be returned */ 1213 } 1214 1215 1216 int 1217 history_is_stifled(void) 1218 { 1219 1220 /* cannot return true answer */ 1221 return max_input_history != INT_MAX; 1222 } 1223 1224 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1225 1226 int 1227 history_truncate_file (const char *filename, int nlines) 1228 { 1229 int ret = 0; 1230 FILE *fp, *tp; 1231 char template[sizeof(_history_tmp_template)]; 1232 char buf[4096]; 1233 int fd; 1234 char *cp; 1235 off_t off; 1236 int count = 0; 1237 ssize_t left = 0; 1238 1239 if (filename == NULL && (filename = _default_history_file()) == NULL) 1240 return errno; 1241 if ((fp = fopen(filename, "r+")) == NULL) 1242 return errno; 1243 strcpy(template, _history_tmp_template); 1244 if ((fd = mkstemp(template)) == -1) { 1245 ret = errno; 1246 goto out1; 1247 } 1248 1249 if ((tp = fdopen(fd, "r+")) == NULL) { 1250 close(fd); 1251 ret = errno; 1252 goto out2; 1253 } 1254 1255 for(;;) { 1256 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1257 if (ferror(fp)) { 1258 ret = errno; 1259 break; 1260 } 1261 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1262 (off_t)-1) { 1263 ret = errno; 1264 break; 1265 } 1266 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1267 if (ferror(fp)) { 1268 ret = errno; 1269 break; 1270 } 1271 if (left == 0) { 1272 count--; 1273 left = sizeof(buf); 1274 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1275 != 1) { 1276 ret = errno; 1277 break; 1278 } 1279 fflush(tp); 1280 break; 1281 } 1282 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1283 ret = errno; 1284 break; 1285 } 1286 count++; 1287 } 1288 if (ret) 1289 goto out3; 1290 cp = buf + left - 1; 1291 if(*cp != '\n') 1292 cp++; 1293 for(;;) { 1294 while (--cp >= buf) { 1295 if (*cp == '\n') { 1296 if (--nlines == 0) { 1297 if (++cp >= buf + sizeof(buf)) { 1298 count++; 1299 cp = buf; 1300 } 1301 break; 1302 } 1303 } 1304 } 1305 if (nlines <= 0 || count == 0) 1306 break; 1307 count--; 1308 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1309 ret = errno; 1310 break; 1311 } 1312 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1313 if (ferror(tp)) { 1314 ret = errno; 1315 break; 1316 } 1317 ret = EAGAIN; 1318 break; 1319 } 1320 cp = buf + sizeof(buf); 1321 } 1322 1323 if (ret || nlines > 0) 1324 goto out3; 1325 1326 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1327 ret = errno; 1328 goto out3; 1329 } 1330 1331 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1332 (off_t)-1) { 1333 ret = errno; 1334 goto out3; 1335 } 1336 1337 for(;;) { 1338 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1339 if (ferror(fp)) 1340 ret = errno; 1341 break; 1342 } 1343 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1344 ret = errno; 1345 break; 1346 } 1347 } 1348 fflush(fp); 1349 if((off = ftello(fp)) > 0) 1350 (void)ftruncate(fileno(fp), off); 1351 out3: 1352 fclose(tp); 1353 out2: 1354 unlink(template); 1355 out1: 1356 fclose(fp); 1357 1358 return ret; 1359 } 1360 1361 1362 /* 1363 * read history from a file given 1364 */ 1365 int 1366 read_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_LOAD, filename) == -1 ? 1375 (errno ? errno : EINVAL) : 0; 1376 } 1377 1378 1379 /* 1380 * write history to a file given 1381 */ 1382 int 1383 write_history(const char *filename) 1384 { 1385 HistEvent ev; 1386 1387 if (h == NULL || e == NULL) 1388 rl_initialize(); 1389 if (filename == NULL && (filename = _default_history_file()) == NULL) 1390 return errno; 1391 return history(h, &ev, H_SAVE, filename) == -1 ? 1392 (errno ? errno : EINVAL) : 0; 1393 } 1394 1395 1396 /* 1397 * returns history ``num''th event 1398 * 1399 * returned pointer points to static variable 1400 */ 1401 HIST_ENTRY * 1402 history_get(int num) 1403 { 1404 static HIST_ENTRY she; 1405 HistEvent ev; 1406 int curr_num; 1407 1408 if (h == NULL || e == NULL) 1409 rl_initialize(); 1410 1411 if (num < history_base) 1412 return NULL; 1413 1414 /* save current position */ 1415 if (history(h, &ev, H_CURR) != 0) 1416 return NULL; 1417 curr_num = ev.num; 1418 1419 /* 1420 * use H_DELDATA to set to nth history (without delete) by passing 1421 * (void **)-1 -- as in history_set_pos 1422 */ 1423 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1424 goto out; 1425 1426 /* get current entry */ 1427 if (history(h, &ev, H_CURR) != 0) 1428 goto out; 1429 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1430 goto out; 1431 she.line = ev.str; 1432 1433 /* restore pointer to where it was */ 1434 (void)history(h, &ev, H_SET, curr_num); 1435 1436 return &she; 1437 1438 out: 1439 /* restore pointer to where it was */ 1440 (void)history(h, &ev, H_SET, curr_num); 1441 return NULL; 1442 } 1443 1444 1445 /* 1446 * add the line to history table 1447 */ 1448 int 1449 add_history(const char *line) 1450 { 1451 HistEvent ev; 1452 1453 if (h == NULL || e == NULL) 1454 rl_initialize(); 1455 1456 if (history(h, &ev, H_ENTER, line) == -1) 1457 return 0; 1458 1459 (void)history(h, &ev, H_GETSIZE); 1460 if (ev.num == history_length) 1461 history_base++; 1462 else 1463 history_length = ev.num; 1464 current_history_valid = 1; 1465 return 0; 1466 } 1467 1468 1469 /* 1470 * remove the specified entry from the history list and return it. 1471 */ 1472 HIST_ENTRY * 1473 remove_history(int num) 1474 { 1475 HIST_ENTRY *he; 1476 HistEvent ev; 1477 1478 if (h == NULL || e == NULL) 1479 rl_initialize(); 1480 1481 if ((he = el_malloc(sizeof(*he))) == NULL) 1482 return NULL; 1483 1484 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1485 el_free(he); 1486 return NULL; 1487 } 1488 1489 he->line = ev.str; 1490 if (history(h, &ev, H_GETSIZE) == 0) 1491 history_length = ev.num; 1492 1493 return he; 1494 } 1495 1496 1497 /* 1498 * replace the line and data of the num-th entry 1499 */ 1500 HIST_ENTRY * 1501 replace_history_entry(int num, const char *line, histdata_t data) 1502 { 1503 HIST_ENTRY *he; 1504 HistEvent ev; 1505 int curr_num; 1506 1507 if (h == NULL || e == NULL) 1508 rl_initialize(); 1509 1510 /* save current position */ 1511 if (history(h, &ev, H_CURR) != 0) 1512 return NULL; 1513 curr_num = ev.num; 1514 1515 /* start from the oldest */ 1516 if (history(h, &ev, H_LAST) != 0) 1517 return NULL; /* error */ 1518 1519 if ((he = el_malloc(sizeof(*he))) == NULL) 1520 return NULL; 1521 1522 /* look forwards for event matching specified offset */ 1523 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1524 goto out; 1525 1526 he->line = strdup(ev.str); 1527 if (he->line == NULL) 1528 goto out; 1529 1530 if (history(h, &ev, H_REPLACE, line, data)) 1531 goto out; 1532 1533 /* restore pointer to where it was */ 1534 if (history(h, &ev, H_SET, curr_num)) 1535 goto out; 1536 1537 return he; 1538 out: 1539 el_free(he); 1540 return NULL; 1541 } 1542 1543 /* 1544 * clear the history list - delete all entries 1545 */ 1546 void 1547 clear_history(void) 1548 { 1549 HistEvent ev; 1550 1551 if (h == NULL || e == NULL) 1552 rl_initialize(); 1553 1554 (void)history(h, &ev, H_CLEAR); 1555 history_length = 0; 1556 current_history_valid = 1; 1557 } 1558 1559 1560 /* 1561 * returns offset of the current history event 1562 */ 1563 int 1564 where_history(void) 1565 { 1566 HistEvent ev; 1567 int curr_num, off; 1568 1569 if (history(h, &ev, H_CURR) != 0) 1570 return 0; 1571 curr_num = ev.num; 1572 1573 /* start from the oldest */ 1574 (void)history(h, &ev, H_LAST); 1575 1576 /* position is zero-based */ 1577 off = 0; 1578 while (ev.num != curr_num && history(h, &ev, H_PREV) == 0) 1579 off++; 1580 1581 return off; 1582 } 1583 1584 1585 /* 1586 * returns current history event or NULL if there is no such event 1587 */ 1588 HIST_ENTRY * 1589 current_history(void) 1590 { 1591 1592 return current_history_valid ? _move_history(H_CURR) : NULL; 1593 } 1594 1595 1596 /* 1597 * returns total number of bytes history events' data are using 1598 */ 1599 int 1600 history_total_bytes(void) 1601 { 1602 HistEvent ev; 1603 int curr_num; 1604 size_t size; 1605 1606 if (history(h, &ev, H_CURR) != 0) 1607 return -1; 1608 curr_num = ev.num; 1609 1610 (void)history(h, &ev, H_FIRST); 1611 size = 0; 1612 do 1613 size += strlen(ev.str) * sizeof(*ev.str); 1614 while (history(h, &ev, H_NEXT) == 0); 1615 1616 /* get to the same position as before */ 1617 history(h, &ev, H_PREV_EVENT, curr_num); 1618 1619 return (int)size; 1620 } 1621 1622 1623 /* 1624 * sets the position in the history list to ``pos'' 1625 */ 1626 int 1627 history_set_pos(int pos) 1628 { 1629 HistEvent ev; 1630 int curr_num; 1631 1632 if (pos >= history_length || pos < 0) 1633 return 0; 1634 1635 (void)history(h, &ev, H_CURR); 1636 curr_num = ev.num; 1637 current_history_valid = 1; 1638 1639 /* 1640 * use H_DELDATA to set to nth history (without delete) by passing 1641 * (void **)-1 1642 */ 1643 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1644 (void)history(h, &ev, H_SET, curr_num); 1645 return 0; 1646 } 1647 return 1; 1648 } 1649 1650 1651 /* 1652 * returns previous event in history and shifts pointer accordingly 1653 * Note that readline and editline define directions in opposite ways. 1654 */ 1655 HIST_ENTRY * 1656 previous_history(void) 1657 { 1658 1659 if (current_history_valid == 0) { 1660 current_history_valid = 1; 1661 return _move_history(H_CURR); 1662 } 1663 return _move_history(H_NEXT); 1664 } 1665 1666 1667 /* 1668 * returns next event in history and shifts pointer accordingly 1669 */ 1670 HIST_ENTRY * 1671 next_history(void) 1672 { 1673 HIST_ENTRY *he; 1674 1675 he = _move_history(H_PREV); 1676 if (he == NULL) 1677 current_history_valid = 0; 1678 return he; 1679 } 1680 1681 1682 /* 1683 * searches for first history event containing the str 1684 */ 1685 int 1686 history_search(const char *str, int direction) 1687 { 1688 HistEvent ev; 1689 const char *strp; 1690 int curr_num; 1691 1692 if (history(h, &ev, H_CURR) != 0) 1693 return -1; 1694 curr_num = ev.num; 1695 1696 for (;;) { 1697 if ((strp = strstr(ev.str, str)) != NULL) 1698 return (int)(strp - ev.str); 1699 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1700 break; 1701 } 1702 (void)history(h, &ev, H_SET, curr_num); 1703 return -1; 1704 } 1705 1706 1707 /* 1708 * searches for first history event beginning with str 1709 */ 1710 int 1711 history_search_prefix(const char *str, int direction) 1712 { 1713 HistEvent ev; 1714 1715 return (history(h, &ev, direction < 0 ? 1716 H_PREV_STR : H_NEXT_STR, str)); 1717 } 1718 1719 1720 /* 1721 * search for event in history containing str, starting at offset 1722 * abs(pos); continue backward, if pos<0, forward otherwise 1723 */ 1724 /* ARGSUSED */ 1725 int 1726 history_search_pos(const char *str, 1727 int direction __attribute__((__unused__)), int pos) 1728 { 1729 HistEvent ev; 1730 int curr_num, off; 1731 1732 off = (pos > 0) ? pos : -pos; 1733 pos = (pos > 0) ? 1 : -1; 1734 1735 if (history(h, &ev, H_CURR) != 0) 1736 return -1; 1737 curr_num = ev.num; 1738 1739 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1740 return -1; 1741 1742 for (;;) { 1743 if (strstr(ev.str, str)) 1744 return off; 1745 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1746 break; 1747 } 1748 1749 /* set "current" pointer back to previous state */ 1750 (void)history(h, &ev, 1751 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1752 1753 return -1; 1754 } 1755 1756 1757 /********************************/ 1758 /* completion functions */ 1759 1760 char * 1761 tilde_expand(char *name) 1762 { 1763 return fn_tilde_expand(name); 1764 } 1765 1766 char * 1767 filename_completion_function(const char *name, int state) 1768 { 1769 return fn_filename_completion_function(name, state); 1770 } 1771 1772 /* 1773 * a completion generator for usernames; returns _first_ username 1774 * which starts with supplied text 1775 * text contains a partial username preceded by random character 1776 * (usually '~'); state resets search from start (??? should we do that anyway) 1777 * it's the caller's responsibility to free the returned value 1778 */ 1779 char * 1780 username_completion_function(const char *text, int state) 1781 { 1782 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1783 struct passwd pwres; 1784 char pwbuf[1024]; 1785 #endif 1786 struct passwd *pass = NULL; 1787 1788 if (text[0] == '\0') 1789 return NULL; 1790 1791 if (*text == '~') 1792 text++; 1793 1794 if (state == 0) 1795 setpwent(); 1796 1797 while ( 1798 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1799 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1800 #else 1801 (pass = getpwent()) != NULL 1802 #endif 1803 && text[0] == pass->pw_name[0] 1804 && strcmp(text, pass->pw_name) == 0) 1805 continue; 1806 1807 if (pass == NULL) { 1808 endpwent(); 1809 return NULL; 1810 } 1811 return strdup(pass->pw_name); 1812 } 1813 1814 1815 /* 1816 * el-compatible wrapper to send TSTP on ^Z 1817 */ 1818 /* ARGSUSED */ 1819 static unsigned char 1820 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1821 { 1822 (void)kill(0, SIGTSTP); 1823 return CC_NORM; 1824 } 1825 1826 /* 1827 * Display list of strings in columnar format on readline's output stream. 1828 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1829 * 'max' is maximum length of string in 'matches'. 1830 */ 1831 void 1832 rl_display_match_list(char **matches, int len, int max) 1833 { 1834 1835 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1836 } 1837 1838 static const char * 1839 /*ARGSUSED*/ 1840 _rl_completion_append_character_function(const char *dummy 1841 __attribute__((__unused__))) 1842 { 1843 static char buf[2]; 1844 buf[0] = (char)rl_completion_append_character; 1845 buf[1] = '\0'; 1846 return buf; 1847 } 1848 1849 1850 /* 1851 * complete word at current point 1852 */ 1853 /* ARGSUSED */ 1854 int 1855 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1856 { 1857 static ct_buffer_t wbreak_conv, sprefix_conv; 1858 char *breakchars; 1859 1860 if (h == NULL || e == NULL) 1861 rl_initialize(); 1862 1863 if (rl_inhibit_completion) { 1864 char arr[2]; 1865 arr[0] = (char)invoking_key; 1866 arr[1] = '\0'; 1867 el_insertstr(e, arr); 1868 return CC_REFRESH; 1869 } 1870 1871 if (rl_completion_word_break_hook != NULL) 1872 breakchars = (*rl_completion_word_break_hook)(); 1873 else 1874 breakchars = rl_basic_word_break_characters; 1875 1876 _rl_update_pos(); 1877 1878 /* Just look at how many global variables modify this operation! */ 1879 return fn_complete(e, 1880 (rl_compentry_func_t *)rl_completion_entry_function, 1881 rl_attempted_completion_function, 1882 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1883 ct_decode_string(breakchars, &sprefix_conv), 1884 _rl_completion_append_character_function, 1885 (size_t)rl_completion_query_items, 1886 &rl_completion_type, &rl_attempted_completion_over, 1887 &rl_point, &rl_end); 1888 1889 1890 } 1891 1892 1893 /* ARGSUSED */ 1894 static unsigned char 1895 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1896 { 1897 return (unsigned char)rl_complete(0, ch); 1898 } 1899 1900 /* 1901 * misc other functions 1902 */ 1903 1904 /* 1905 * bind key c to readline-type function func 1906 */ 1907 int 1908 rl_bind_key(int c, rl_command_func_t *func) 1909 { 1910 int retval = -1; 1911 1912 if (h == NULL || e == NULL) 1913 rl_initialize(); 1914 1915 if (func == rl_insert) { 1916 /* XXX notice there is no range checking of ``c'' */ 1917 e->el_map.key[c] = ED_INSERT; 1918 retval = 0; 1919 } 1920 return retval; 1921 } 1922 1923 1924 /* 1925 * read one key from input - handles chars pushed back 1926 * to input stream also 1927 */ 1928 int 1929 rl_read_key(void) 1930 { 1931 char fooarr[2 * sizeof(int)]; 1932 1933 if (e == NULL || h == NULL) 1934 rl_initialize(); 1935 1936 return el_getc(e, fooarr); 1937 } 1938 1939 1940 /* 1941 * reset the terminal 1942 */ 1943 /* ARGSUSED */ 1944 void 1945 rl_reset_terminal(const char *p __attribute__((__unused__))) 1946 { 1947 1948 if (h == NULL || e == NULL) 1949 rl_initialize(); 1950 el_reset(e); 1951 } 1952 1953 1954 /* 1955 * insert character ``c'' back into input stream, ``count'' times 1956 */ 1957 int 1958 rl_insert(int count, int c) 1959 { 1960 char arr[2]; 1961 1962 if (h == NULL || e == NULL) 1963 rl_initialize(); 1964 1965 /* XXX - int -> char conversion can lose on multichars */ 1966 arr[0] = (char)c; 1967 arr[1] = '\0'; 1968 1969 for (; count > 0; count--) 1970 el_push(e, arr); 1971 1972 return 0; 1973 } 1974 1975 int 1976 rl_insert_text(const char *text) 1977 { 1978 if (!text || *text == 0) 1979 return 0; 1980 1981 if (h == NULL || e == NULL) 1982 rl_initialize(); 1983 1984 if (el_insertstr(e, text) < 0) 1985 return 0; 1986 return (int)strlen(text); 1987 } 1988 1989 /*ARGSUSED*/ 1990 int 1991 rl_newline(int count __attribute__((__unused__)), 1992 int c __attribute__((__unused__))) 1993 { 1994 /* 1995 * Readline-4.0 appears to ignore the args. 1996 */ 1997 return rl_insert(1, '\n'); 1998 } 1999 2000 /*ARGSUSED*/ 2001 static unsigned char 2002 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2003 { 2004 if (map[c] == NULL) 2005 return CC_ERROR; 2006 2007 _rl_update_pos(); 2008 2009 (*map[c])(1, c); 2010 2011 /* If rl_done was set by the above call, deal with it here */ 2012 if (rl_done) 2013 return CC_EOF; 2014 2015 return CC_NORM; 2016 } 2017 2018 int 2019 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2020 { 2021 char dest[8]; 2022 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2023 return -1; 2024 map[(unsigned char)c] = fun; 2025 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2026 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2027 el_set(e, EL_BIND, dest, name, NULL); 2028 return 0; 2029 } 2030 2031 void 2032 rl_callback_read_char(void) 2033 { 2034 int count = 0, done = 0; 2035 const char *buf = el_gets(e, &count); 2036 char *wbuf; 2037 2038 if (buf == NULL || count-- <= 0) 2039 return; 2040 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2041 done = 1; 2042 if (buf[count] == '\n' || buf[count] == '\r') 2043 done = 2; 2044 2045 if (done && rl_linefunc != NULL) { 2046 el_set(e, EL_UNBUFFERED, 0); 2047 if (done == 2) { 2048 if ((wbuf = strdup(buf)) != NULL) 2049 wbuf[count] = '\0'; 2050 } else 2051 wbuf = NULL; 2052 (*(void (*)(const char *))rl_linefunc)(wbuf); 2053 el_set(e, EL_UNBUFFERED, 1); 2054 } 2055 } 2056 2057 void 2058 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2059 { 2060 if (e == NULL) { 2061 rl_initialize(); 2062 } 2063 (void)rl_set_prompt(prompt); 2064 rl_linefunc = linefunc; 2065 el_set(e, EL_UNBUFFERED, 1); 2066 } 2067 2068 void 2069 rl_callback_handler_remove(void) 2070 { 2071 el_set(e, EL_UNBUFFERED, 0); 2072 rl_linefunc = NULL; 2073 } 2074 2075 void 2076 rl_redisplay(void) 2077 { 2078 char a[2]; 2079 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2080 a[1] = '\0'; 2081 el_push(e, a); 2082 } 2083 2084 int 2085 rl_get_previous_history(int count, int key) 2086 { 2087 char a[2]; 2088 a[0] = (char)key; 2089 a[1] = '\0'; 2090 while (count--) 2091 el_push(e, a); 2092 return 0; 2093 } 2094 2095 void 2096 /*ARGSUSED*/ 2097 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2098 { 2099 el_set(e, EL_PREP_TERM, 1); 2100 } 2101 2102 void 2103 rl_deprep_terminal(void) 2104 { 2105 el_set(e, EL_PREP_TERM, 0); 2106 } 2107 2108 int 2109 rl_read_init_file(const char *s) 2110 { 2111 return el_source(e, s); 2112 } 2113 2114 int 2115 rl_parse_and_bind(const char *line) 2116 { 2117 const char **argv; 2118 int argc; 2119 Tokenizer *tok; 2120 2121 tok = tok_init(NULL); 2122 tok_str(tok, line, &argc, &argv); 2123 argc = el_parse(e, argc, argv); 2124 tok_end(tok); 2125 return argc ? 1 : 0; 2126 } 2127 2128 int 2129 rl_variable_bind(const char *var, const char *value) 2130 { 2131 /* 2132 * The proper return value is undocument, but this is what the 2133 * readline source seems to do. 2134 */ 2135 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2136 } 2137 2138 void 2139 rl_stuff_char(int c) 2140 { 2141 char buf[2]; 2142 2143 buf[0] = (char)c; 2144 buf[1] = '\0'; 2145 el_insertstr(e, buf); 2146 } 2147 2148 static int 2149 _rl_event_read_char(EditLine *el, wchar_t *wc) 2150 { 2151 char ch; 2152 int n; 2153 ssize_t num_read = 0; 2154 2155 ch = '\0'; 2156 *wc = L'\0'; 2157 while (rl_event_hook) { 2158 2159 (*rl_event_hook)(); 2160 2161 #if defined(FIONREAD) 2162 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2163 return -1; 2164 if (n) 2165 num_read = read(el->el_infd, &ch, (size_t)1); 2166 else 2167 num_read = 0; 2168 #elif defined(F_SETFL) && defined(O_NDELAY) 2169 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2170 return -1; 2171 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2172 return -1; 2173 num_read = read(el->el_infd, &ch, 1); 2174 if (fcntl(el->el_infd, F_SETFL, n)) 2175 return -1; 2176 #else 2177 /* not non-blocking, but what you gonna do? */ 2178 num_read = read(el->el_infd, &ch, 1); 2179 return -1; 2180 #endif 2181 2182 if (num_read < 0 && errno == EAGAIN) 2183 continue; 2184 if (num_read == 0) 2185 continue; 2186 break; 2187 } 2188 if (!rl_event_hook) 2189 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2190 *wc = (wchar_t)ch; 2191 return (int)num_read; 2192 } 2193 2194 static void 2195 _rl_update_pos(void) 2196 { 2197 const LineInfo *li = el_line(e); 2198 2199 rl_point = (int)(li->cursor - li->buffer); 2200 rl_end = (int)(li->lastchar - li->buffer); 2201 } 2202 2203 void 2204 rl_get_screen_size(int *rows, int *cols) 2205 { 2206 if (rows) 2207 el_get(e, EL_GETTC, "li", rows, (void *)0); 2208 if (cols) 2209 el_get(e, EL_GETTC, "co", cols, (void *)0); 2210 } 2211 2212 void 2213 rl_set_screen_size(int rows, int cols) 2214 { 2215 char buf[64]; 2216 (void)snprintf(buf, sizeof(buf), "%d", rows); 2217 el_set(e, EL_SETTC, "li", buf, NULL); 2218 (void)snprintf(buf, sizeof(buf), "%d", cols); 2219 el_set(e, EL_SETTC, "co", buf, NULL); 2220 } 2221 2222 char ** 2223 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2224 { 2225 size_t len, max, i, j, min; 2226 char **list, *match, *a, *b; 2227 2228 len = 1; 2229 max = 10; 2230 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2231 return NULL; 2232 2233 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2234 list[len++] = match; 2235 if (len == max) { 2236 char **nl; 2237 max += 10; 2238 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2239 goto out; 2240 list = nl; 2241 } 2242 } 2243 if (len == 1) 2244 goto out; 2245 list[len] = NULL; 2246 if (len == 2) { 2247 if ((list[0] = strdup(list[1])) == NULL) 2248 goto out; 2249 return list; 2250 } 2251 qsort(&list[1], len - 1, sizeof(*list), 2252 (int (*)(const void *, const void *)) strcmp); 2253 min = SIZE_MAX; 2254 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2255 b = list[i + 1]; 2256 for (j = 0; a[j] && a[j] == b[j]; j++) 2257 continue; 2258 if (min > j) 2259 min = j; 2260 } 2261 if (min == 0 && *str) { 2262 if ((list[0] = strdup(str)) == NULL) 2263 goto out; 2264 } else { 2265 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2266 goto out; 2267 (void)memcpy(list[0], list[1], min); 2268 list[0][min] = '\0'; 2269 } 2270 return list; 2271 2272 out: 2273 el_free(list); 2274 return NULL; 2275 } 2276 2277 char * 2278 rl_filename_completion_function (const char *text, int state) 2279 { 2280 return fn_filename_completion_function(text, state); 2281 } 2282 2283 void 2284 rl_forced_update_display(void) 2285 { 2286 el_set(e, EL_REFRESH); 2287 } 2288 2289 int 2290 _rl_abort_internal(void) 2291 { 2292 el_beep(e); 2293 longjmp(topbuf, 1); 2294 /*NOTREACHED*/ 2295 } 2296 2297 int 2298 _rl_qsort_string_compare(char **s1, char **s2) 2299 { 2300 return strcoll(*s1, *s2); 2301 } 2302 2303 HISTORY_STATE * 2304 history_get_history_state(void) 2305 { 2306 HISTORY_STATE *hs; 2307 2308 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2309 return NULL; 2310 hs->length = history_length; 2311 return hs; 2312 } 2313 2314 int 2315 /*ARGSUSED*/ 2316 rl_kill_text(int from __attribute__((__unused__)), 2317 int to __attribute__((__unused__))) 2318 { 2319 return 0; 2320 } 2321 2322 Keymap 2323 rl_make_bare_keymap(void) 2324 { 2325 return NULL; 2326 } 2327 2328 Keymap 2329 rl_get_keymap(void) 2330 { 2331 return NULL; 2332 } 2333 2334 void 2335 /*ARGSUSED*/ 2336 rl_set_keymap(Keymap k __attribute__((__unused__))) 2337 { 2338 } 2339 2340 int 2341 /*ARGSUSED*/ 2342 rl_generic_bind(int type __attribute__((__unused__)), 2343 const char * keyseq __attribute__((__unused__)), 2344 const char * data __attribute__((__unused__)), 2345 Keymap k __attribute__((__unused__))) 2346 { 2347 return 0; 2348 } 2349 2350 int 2351 /*ARGSUSED*/ 2352 rl_bind_key_in_map(int key __attribute__((__unused__)), 2353 rl_command_func_t *fun __attribute__((__unused__)), 2354 Keymap k __attribute__((__unused__))) 2355 { 2356 return 0; 2357 } 2358 2359 /* unsupported, but needed by python */ 2360 void 2361 rl_cleanup_after_signal(void) 2362 { 2363 } 2364 2365 int 2366 rl_on_new_line(void) 2367 { 2368 return 0; 2369 } 2370 2371 void 2372 rl_free_line_state(void) 2373 { 2374 } 2375 2376 int 2377 /*ARGSUSED*/ 2378 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2379 { 2380 return 0; 2381 } 2382
Indexes created Fri Oct 03 02:09:57 GMT 2025