1 /* $NetBSD: readline.c,v 1.157 2019/08/21 11:11:48 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 1.157 2019/08/21 11:11:48 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 const 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 rl_hook_func_t *rl_event_hook = NULL; 84 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 85 emacs_meta_keymap, 86 emacs_ctlx_keymap; 87 /* 88 * The following is not implemented; we always catch signals in the 89 * libedit fashion: set handlers on entry to el_gets() and clear them 90 * on the way out. This simplistic approach works for most cases; if 91 * it does not work for your application, please let us know. 92 */ 93 int rl_catch_signals = 1; 94 int rl_catch_sigwinch = 1; 95 96 int history_base = 1; /* probably never subject to change */ 97 int history_length = 0; 98 int history_offset = 0; 99 int max_input_history = 0; 100 char history_expansion_char = '!'; 101 char history_subst_char = '^'; 102 char *history_no_expand_chars = expand_chars; 103 Function *history_inhibit_expansion_function = NULL; 104 char *history_arg_extract(int start, int end, const char *str); 105 106 int rl_inhibit_completion = 0; 107 int rl_attempted_completion_over = 0; 108 const char *rl_basic_word_break_characters = break_chars; 109 char *rl_completer_word_break_characters = NULL; 110 const char *rl_completer_quote_characters = NULL; 111 rl_compentry_func_t *rl_completion_entry_function = NULL; 112 char *(*rl_completion_word_break_hook)(void) = NULL; 113 rl_completion_func_t *rl_attempted_completion_function = NULL; 114 Function *rl_pre_input_hook = NULL; 115 Function *rl_startup1_hook = NULL; 116 int (*rl_getc_function)(FILE *) = NULL; 117 char *rl_terminal_name = NULL; 118 int rl_already_prompted = 0; 119 int rl_filename_completion_desired = 0; 120 int rl_ignore_completion_duplicates = 0; 121 int readline_echoing_p = 1; 122 int _rl_print_completions_horizontally = 0; 123 VFunction *rl_redisplay_function = NULL; 124 Function *rl_startup_hook = NULL; 125 int rl_did_startup_hook = 0; 126 VFunction *rl_completion_display_matches_hook = NULL; 127 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 128 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 129 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 130 131 /* 132 * The current prompt string. 133 */ 134 char *rl_prompt = NULL; 135 /* 136 * This is set to character indicating type of completion being done by 137 * rl_complete_internal(); this is available for application completion 138 * functions. 139 */ 140 int rl_completion_type = 0; 141 142 /* 143 * If more than this number of items results from query for possible 144 * completions, we ask user if they are sure to really display the list. 145 */ 146 int rl_completion_query_items = 100; 147 148 /* 149 * List of characters which are word break characters, but should be left 150 * in the parsed text when it is passed to the completion function. 151 * Shell uses this to help determine what kind of completing to do. 152 */ 153 const char *rl_special_prefixes = NULL; 154 155 /* 156 * This is the character appended to the completed words if at the end of 157 * the line. Default is ' ' (a space). 158 */ 159 int rl_completion_append_character = ' '; 160 161 /* stuff below is used internally by libedit for readline emulation */ 162 163 static History *h = NULL; 164 static EditLine *e = NULL; 165 static rl_command_func_t *map[256]; 166 static jmp_buf topbuf; 167 168 /* internal functions */ 169 static unsigned char _el_rl_complete(EditLine *, int); 170 static unsigned char _el_rl_tstp(EditLine *, int); 171 static char *_get_prompt(EditLine *); 172 static int _getc_function(EditLine *, wchar_t *); 173 static int _history_expand_command(const char *, size_t, size_t, 174 char **); 175 static char *_rl_compat_sub(const char *, const char *, 176 const char *, int); 177 static int _rl_event_read_char(EditLine *, wchar_t *); 178 static void _rl_update_pos(void); 179 180 static HIST_ENTRY rl_he; 181 182 /* ARGSUSED */ 183 static char * 184 _get_prompt(EditLine *el __attribute__((__unused__))) 185 { 186 rl_already_prompted = 1; 187 return rl_prompt; 188 } 189 190 191 /* 192 * read one key from user defined input function 193 */ 194 static int 195 /*ARGSUSED*/ 196 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 197 { 198 int i; 199 200 i = (*rl_getc_function)(rl_instream); 201 if (i == -1) 202 return 0; 203 *c = (wchar_t)i; 204 return 1; 205 } 206 207 static void 208 _resize_fun(EditLine *el, void *a) 209 { 210 const LineInfo *li; 211 char **ap = a; 212 213 li = el_line(el); 214 /* a cheesy way to get rid of const cast. */ 215 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 216 } 217 218 static const char * 219 _default_history_file(void) 220 { 221 struct passwd *p; 222 static char *path; 223 size_t len; 224 225 if (path) 226 return path; 227 228 if ((p = getpwuid(getuid())) == NULL) 229 return NULL; 230 231 len = strlen(p->pw_dir) + sizeof("/.history"); 232 if ((path = malloc(len)) == NULL) 233 return NULL; 234 235 (void)snprintf(path, len, "%s/.history", p->pw_dir); 236 return path; 237 } 238 239 /* 240 * READLINE compatibility stuff 241 */ 242 243 /* 244 * Set the prompt 245 */ 246 int 247 rl_set_prompt(const char *prompt) 248 { 249 char *p; 250 251 if (!prompt) 252 prompt = ""; 253 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 254 return 0; 255 if (rl_prompt) 256 el_free(rl_prompt); 257 rl_prompt = strdup(prompt); 258 if (rl_prompt == NULL) 259 return -1; 260 261 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) { 262 /* Remove adjacent end/start markers to avoid double-escapes. */ 263 if (p[1] == RL_PROMPT_START_IGNORE) { 264 memmove(p, p + 2, 1 + strlen(p + 2)); 265 } else { 266 *p = RL_PROMPT_START_IGNORE; 267 } 268 } 269 270 return 0; 271 } 272 273 /* 274 * initialize rl compat stuff 275 */ 276 int 277 rl_initialize(void) 278 { 279 HistEvent ev; 280 int editmode = 1; 281 struct termios t; 282 283 if (e != NULL) 284 el_end(e); 285 if (h != NULL) 286 history_end(h); 287 288 if (!rl_instream) 289 rl_instream = stdin; 290 if (!rl_outstream) 291 rl_outstream = stdout; 292 293 /* 294 * See if we don't really want to run the editor 295 */ 296 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 297 editmode = 0; 298 299 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 300 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 301 NO_RESET); 302 303 if (!editmode) 304 el_set(e, EL_EDITMODE, 0); 305 306 h = history_init(); 307 if (!e || !h) 308 return -1; 309 310 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 311 history_length = 0; 312 max_input_history = INT_MAX; 313 el_set(e, EL_HIST, history, h); 314 315 /* Setup resize function */ 316 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 317 318 /* setup getc function if valid */ 319 if (rl_getc_function) 320 el_set(e, EL_GETCFN, _getc_function); 321 322 /* for proper prompt printing in readline() */ 323 if (rl_set_prompt("") == -1) { 324 history_end(h); 325 el_end(e); 326 return -1; 327 } 328 el_set(e, EL_PROMPT_ESC, _get_prompt, RL_PROMPT_START_IGNORE); 329 el_set(e, EL_SIGNAL, rl_catch_signals); 330 331 /* set default mode to "emacs"-style and read setting afterwards */ 332 /* so this can be overridden */ 333 el_set(e, EL_EDITOR, "emacs"); 334 if (rl_terminal_name != NULL) 335 el_set(e, EL_TERMINAL, rl_terminal_name); 336 else 337 el_get(e, EL_TERMINAL, &rl_terminal_name); 338 339 /* 340 * Word completion - this has to go AFTER rebinding keys 341 * to emacs-style. 342 */ 343 el_set(e, EL_ADDFN, "rl_complete", 344 "ReadLine compatible completion function", 345 _el_rl_complete); 346 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 347 348 /* 349 * Send TSTP when ^Z is pressed. 350 */ 351 el_set(e, EL_ADDFN, "rl_tstp", 352 "ReadLine compatible suspend function", 353 _el_rl_tstp); 354 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 355 356 /* 357 * Set some readline compatible key-bindings. 358 */ 359 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 360 361 /* 362 * Allow the use of Home/End keys. 363 */ 364 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 365 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 366 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 367 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 368 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 369 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 370 371 /* 372 * Allow the use of the Delete/Insert keys. 373 */ 374 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 375 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 376 377 /* 378 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 379 */ 380 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 381 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 382 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 383 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 384 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 385 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 386 387 /* read settings from configuration file */ 388 el_source(e, NULL); 389 390 /* 391 * Unfortunately, some applications really do use rl_point 392 * and rl_line_buffer directly. 393 */ 394 _resize_fun(e, &rl_line_buffer); 395 _rl_update_pos(); 396 397 tty_end(e, TCSADRAIN); 398 399 return 0; 400 } 401 402 403 /* 404 * read one line from input stream and return it, chomping 405 * trailing newline (if there is any) 406 */ 407 char * 408 readline(const char *p) 409 { 410 HistEvent ev; 411 const char * volatile prompt = p; 412 int count; 413 const char *ret; 414 char *buf; 415 static int used_event_hook; 416 417 if (e == NULL || h == NULL) 418 rl_initialize(); 419 if (rl_did_startup_hook == 0 && rl_startup_hook) { 420 rl_did_startup_hook = 1; 421 (*rl_startup_hook)(NULL, 0); 422 } 423 tty_init(e); 424 425 426 rl_done = 0; 427 428 (void)setjmp(topbuf); 429 buf = NULL; 430 431 /* update prompt accordingly to what has been passed */ 432 if (rl_set_prompt(prompt) == -1) 433 goto out; 434 435 if (rl_pre_input_hook) 436 (*rl_pre_input_hook)(NULL, 0); 437 438 if (rl_event_hook && !(e->el_flags & NO_TTY)) { 439 el_set(e, EL_GETCFN, _rl_event_read_char); 440 used_event_hook = 1; 441 } 442 443 if (!rl_event_hook && used_event_hook) { 444 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 445 used_event_hook = 0; 446 } 447 448 rl_already_prompted = 0; 449 450 /* get one line from input stream */ 451 ret = el_gets(e, &count); 452 453 if (ret && count > 0) { 454 int lastidx; 455 456 buf = strdup(ret); 457 if (buf == NULL) 458 goto out; 459 lastidx = count - 1; 460 if (buf[lastidx] == '\n') 461 buf[lastidx] = '\0'; 462 } else 463 buf = NULL; 464 465 history(h, &ev, H_GETSIZE); 466 history_length = ev.num; 467 468 out: 469 tty_end(e, TCSADRAIN); 470 return buf; 471 } 472 473 /* 474 * history functions 475 */ 476 477 /* 478 * is normally called before application starts to use 479 * history expansion functions 480 */ 481 void 482 using_history(void) 483 { 484 if (h == NULL || e == NULL) 485 rl_initialize(); 486 history_offset = history_length; 487 } 488 489 490 /* 491 * substitute ``what'' with ``with'', returning resulting string; if 492 * globally == 1, substitutes all occurrences of what, otherwise only the 493 * first one 494 */ 495 static char * 496 _rl_compat_sub(const char *str, const char *what, const char *with, 497 int globally) 498 { 499 const char *s; 500 char *r, *result; 501 size_t len, with_len, what_len; 502 503 len = strlen(str); 504 with_len = strlen(with); 505 what_len = strlen(what); 506 507 /* calculate length we need for result */ 508 s = str; 509 while (*s) { 510 if (*s == *what && !strncmp(s, what, what_len)) { 511 len += with_len - what_len; 512 if (!globally) 513 break; 514 s += what_len; 515 } else 516 s++; 517 } 518 r = result = el_calloc(len + 1, sizeof(*r)); 519 if (result == NULL) 520 return NULL; 521 s = str; 522 while (*s) { 523 if (*s == *what && !strncmp(s, what, what_len)) { 524 (void)strncpy(r, with, with_len); 525 r += with_len; 526 s += what_len; 527 if (!globally) { 528 (void)strcpy(r, s); 529 return result; 530 } 531 } else 532 *r++ = *s++; 533 } 534 *r = '\0'; 535 return result; 536 } 537 538 static char *last_search_pat; /* last !?pat[?] search pattern */ 539 static char *last_search_match; /* last !?pat[?] that matched */ 540 541 const char * 542 get_history_event(const char *cmd, int *cindex, int qchar) 543 { 544 int idx, sign, sub, num, begin, ret; 545 size_t len; 546 char *pat; 547 const char *rptr; 548 HistEvent ev; 549 550 idx = *cindex; 551 if (cmd[idx++] != history_expansion_char) 552 return NULL; 553 554 /* find out which event to take */ 555 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 556 if (history(h, &ev, H_FIRST) != 0) 557 return NULL; 558 *cindex = cmd[idx]? (idx + 1):idx; 559 return ev.str; 560 } 561 sign = 0; 562 if (cmd[idx] == '-') { 563 sign = 1; 564 idx++; 565 } 566 567 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 568 HIST_ENTRY *he; 569 570 num = 0; 571 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 572 num = num * 10 + cmd[idx] - '0'; 573 idx++; 574 } 575 if (sign) 576 num = history_length - num + history_base; 577 578 if (!(he = history_get(num))) 579 return NULL; 580 581 *cindex = idx; 582 return he->line; 583 } 584 sub = 0; 585 if (cmd[idx] == '?') { 586 sub = 1; 587 idx++; 588 } 589 begin = idx; 590 while (cmd[idx]) { 591 if (cmd[idx] == '\n') 592 break; 593 if (sub && cmd[idx] == '?') 594 break; 595 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 596 || cmd[idx] == '\t' || cmd[idx] == qchar)) 597 break; 598 idx++; 599 } 600 len = (size_t)idx - (size_t)begin; 601 if (sub && cmd[idx] == '?') 602 idx++; 603 if (sub && len == 0 && last_search_pat && *last_search_pat) 604 pat = last_search_pat; 605 else if (len == 0) 606 return NULL; 607 else { 608 if ((pat = el_calloc(len + 1, sizeof(*pat))) == NULL) 609 return NULL; 610 (void)strncpy(pat, cmd + begin, len); 611 pat[len] = '\0'; 612 } 613 614 if (history(h, &ev, H_CURR) != 0) { 615 if (pat != last_search_pat) 616 el_free(pat); 617 return NULL; 618 } 619 num = ev.num; 620 621 if (sub) { 622 if (pat != last_search_pat) { 623 if (last_search_pat) 624 el_free(last_search_pat); 625 last_search_pat = pat; 626 } 627 ret = history_search(pat, -1); 628 } else 629 ret = history_search_prefix(pat, -1); 630 631 if (ret == -1) { 632 /* restore to end of list on failed search */ 633 history(h, &ev, H_FIRST); 634 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 635 if (pat != last_search_pat) 636 el_free(pat); 637 return NULL; 638 } 639 640 if (sub && len) { 641 if (last_search_match && last_search_match != pat) 642 el_free(last_search_match); 643 last_search_match = pat; 644 } 645 646 if (pat != last_search_pat) 647 el_free(pat); 648 649 if (history(h, &ev, H_CURR) != 0) 650 return NULL; 651 *cindex = idx; 652 rptr = ev.str; 653 654 /* roll back to original position */ 655 (void)history(h, &ev, H_SET, num); 656 657 return rptr; 658 } 659 660 /* 661 * the real function doing history expansion - takes as argument command 662 * to do and data upon which the command should be executed 663 * does expansion the way I've understood readline documentation 664 * 665 * returns 0 if data was not modified, 1 if it was and 2 if the string 666 * should be only printed and not executed; in case of error, 667 * returns -1 and *result points to NULL 668 * it's the caller's responsibility to free() the string returned in *result 669 */ 670 static int 671 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 672 char **result) 673 { 674 char *tmp, *search = NULL, *aptr; 675 const char *ptr, *cmd; 676 static char *from = NULL, *to = NULL; 677 int start, end, idx, has_mods = 0; 678 int p_on = 0, g_on = 0; 679 680 *result = NULL; 681 aptr = NULL; 682 ptr = NULL; 683 684 /* First get event specifier */ 685 idx = 0; 686 687 if (strchr(":^*$", command[offs + 1])) { 688 char str[4]; 689 /* 690 * "!:" is shorthand for "!!:". 691 * "!^", "!*" and "!$" are shorthand for 692 * "!!:^", "!!:*" and "!!:$" respectively. 693 */ 694 str[0] = str[1] = '!'; 695 str[2] = '0'; 696 ptr = get_history_event(str, &idx, 0); 697 idx = (command[offs + 1] == ':')? 1:0; 698 has_mods = 1; 699 } else { 700 if (command[offs + 1] == '#') { 701 /* use command so far */ 702 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 703 == NULL) 704 return -1; 705 (void)strncpy(aptr, command, offs); 706 aptr[offs] = '\0'; 707 idx = 1; 708 } else { 709 int qchar; 710 711 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 712 ptr = get_history_event(command + offs, &idx, qchar); 713 } 714 has_mods = command[offs + (size_t)idx] == ':'; 715 } 716 717 if (ptr == NULL && aptr == NULL) 718 return -1; 719 720 if (!has_mods) { 721 *result = strdup(aptr ? aptr : ptr); 722 if (aptr) 723 el_free(aptr); 724 if (*result == NULL) 725 return -1; 726 return 1; 727 } 728 729 cmd = command + offs + idx + 1; 730 731 /* Now parse any word designators */ 732 733 if (*cmd == '%') /* last word matched by ?pat? */ 734 tmp = strdup(last_search_match? last_search_match:""); 735 else if (strchr("^*$-0123456789", *cmd)) { 736 start = end = -1; 737 if (*cmd == '^') 738 start = end = 1, cmd++; 739 else if (*cmd == '$') 740 start = -1, cmd++; 741 else if (*cmd == '*') 742 start = 1, cmd++; 743 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 744 start = 0; 745 while (*cmd && '0' <= *cmd && *cmd <= '9') 746 start = start * 10 + *cmd++ - '0'; 747 748 if (*cmd == '-') { 749 if (isdigit((unsigned char) cmd[1])) { 750 cmd++; 751 end = 0; 752 while (*cmd && '0' <= *cmd && *cmd <= '9') 753 end = end * 10 + *cmd++ - '0'; 754 } else if (cmd[1] == '$') { 755 cmd += 2; 756 end = -1; 757 } else { 758 cmd++; 759 end = -2; 760 } 761 } else if (*cmd == '*') 762 end = -1, cmd++; 763 else 764 end = start; 765 } 766 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 767 if (tmp == NULL) { 768 (void)fprintf(rl_outstream, "%s: Bad word specifier", 769 command + offs + idx); 770 if (aptr) 771 el_free(aptr); 772 return -1; 773 } 774 } else 775 tmp = strdup(aptr? aptr:ptr); 776 777 if (aptr) 778 el_free(aptr); 779 780 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 781 *result = tmp; 782 return 1; 783 } 784 785 for (; *cmd; cmd++) { 786 if (*cmd == ':') 787 continue; 788 else if (*cmd == 'h') { /* remove trailing path */ 789 if ((aptr = strrchr(tmp, '/')) != NULL) 790 *aptr = '\0'; 791 } else if (*cmd == 't') { /* remove leading path */ 792 if ((aptr = strrchr(tmp, '/')) != NULL) { 793 aptr = strdup(aptr + 1); 794 el_free(tmp); 795 tmp = aptr; 796 } 797 } else if (*cmd == 'r') { /* remove trailing suffix */ 798 if ((aptr = strrchr(tmp, '.')) != NULL) 799 *aptr = '\0'; 800 } else if (*cmd == 'e') { /* remove all but suffix */ 801 if ((aptr = strrchr(tmp, '.')) != NULL) { 802 aptr = strdup(aptr); 803 el_free(tmp); 804 tmp = aptr; 805 } 806 } else if (*cmd == 'p') /* print only */ 807 p_on = 1; 808 else if (*cmd == 'g') 809 g_on = 2; 810 else if (*cmd == 's' || *cmd == '&') { 811 char *what, *with, delim; 812 size_t len, from_len; 813 size_t size; 814 815 if (*cmd == '&' && (from == NULL || to == NULL)) 816 continue; 817 else if (*cmd == 's') { 818 delim = *(++cmd), cmd++; 819 size = 16; 820 what = el_realloc(from, size * sizeof(*what)); 821 if (what == NULL) { 822 el_free(from); 823 el_free(tmp); 824 return 0; 825 } 826 len = 0; 827 for (; *cmd && *cmd != delim; cmd++) { 828 if (*cmd == '\\' && cmd[1] == delim) 829 cmd++; 830 if (len >= size) { 831 char *nwhat; 832 nwhat = el_realloc(what, 833 (size <<= 1) * 834 sizeof(*nwhat)); 835 if (nwhat == NULL) { 836 el_free(what); 837 el_free(tmp); 838 return 0; 839 } 840 what = nwhat; 841 } 842 what[len++] = *cmd; 843 } 844 what[len] = '\0'; 845 from = what; 846 if (*what == '\0') { 847 el_free(what); 848 if (search) { 849 from = strdup(search); 850 if (from == NULL) { 851 el_free(tmp); 852 return 0; 853 } 854 } else { 855 from = NULL; 856 el_free(tmp); 857 return -1; 858 } 859 } 860 cmd++; /* shift after delim */ 861 if (!*cmd) 862 continue; 863 864 size = 16; 865 with = el_realloc(to, size * sizeof(*with)); 866 if (with == NULL) { 867 el_free(to); 868 el_free(tmp); 869 return -1; 870 } 871 len = 0; 872 from_len = strlen(from); 873 for (; *cmd && *cmd != delim; cmd++) { 874 if (len + from_len + 1 >= size) { 875 char *nwith; 876 size += from_len + 1; 877 nwith = el_realloc(with, 878 size * sizeof(*nwith)); 879 if (nwith == NULL) { 880 el_free(with); 881 el_free(tmp); 882 return -1; 883 } 884 with = nwith; 885 } 886 if (*cmd == '&') { 887 /* safe */ 888 (void)strcpy(&with[len], from); 889 len += from_len; 890 continue; 891 } 892 if (*cmd == '\\' 893 && (*(cmd + 1) == delim 894 || *(cmd + 1) == '&')) 895 cmd++; 896 with[len++] = *cmd; 897 } 898 with[len] = '\0'; 899 to = with; 900 } 901 902 aptr = _rl_compat_sub(tmp, from, to, g_on); 903 if (aptr) { 904 el_free(tmp); 905 tmp = aptr; 906 } 907 g_on = 0; 908 } 909 } 910 *result = tmp; 911 return p_on? 2:1; 912 } 913 914 915 /* 916 * csh-style history expansion 917 */ 918 int 919 history_expand(char *str, char **output) 920 { 921 int ret = 0; 922 size_t idx, i, size; 923 char *tmp, *result; 924 925 if (h == NULL || e == NULL) 926 rl_initialize(); 927 928 if (history_expansion_char == 0) { 929 *output = strdup(str); 930 return 0; 931 } 932 933 *output = NULL; 934 if (str[0] == history_subst_char) { 935 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 936 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 937 if (*output == NULL) 938 return 0; 939 (*output)[0] = (*output)[1] = history_expansion_char; 940 (*output)[2] = ':'; 941 (*output)[3] = 's'; 942 (void)strcpy((*output) + 4, str); 943 str = *output; 944 } else { 945 *output = strdup(str); 946 if (*output == NULL) 947 return 0; 948 } 949 950 #define ADD_STRING(what, len, fr) \ 951 { \ 952 if (idx + len + 1 > size) { \ 953 char *nresult = el_realloc(result, \ 954 (size += len + 1) * sizeof(*nresult)); \ 955 if (nresult == NULL) { \ 956 el_free(*output); \ 957 if (/*CONSTCOND*/fr) \ 958 el_free(tmp); \ 959 return 0; \ 960 } \ 961 result = nresult; \ 962 } \ 963 (void)strncpy(&result[idx], what, len); \ 964 idx += len; \ 965 result[idx] = '\0'; \ 966 } 967 968 result = NULL; 969 size = idx = 0; 970 tmp = NULL; 971 for (i = 0; str[i];) { 972 int qchar, loop_again; 973 size_t len, start, j; 974 975 qchar = 0; 976 loop_again = 1; 977 start = j = i; 978 loop: 979 for (; str[j]; j++) { 980 if (str[j] == '\\' && 981 str[j + 1] == history_expansion_char) { 982 len = strlen(&str[j + 1]) + 1; 983 memmove(&str[j], &str[j + 1], len); 984 continue; 985 } 986 if (!loop_again) { 987 if (isspace((unsigned char) str[j]) 988 || str[j] == qchar) 989 break; 990 } 991 if (str[j] == history_expansion_char 992 && !strchr(history_no_expand_chars, str[j + 1]) 993 && (!history_inhibit_expansion_function || 994 (*history_inhibit_expansion_function)(str, 995 (int)j) == 0)) 996 break; 997 } 998 999 if (str[j] && loop_again) { 1000 i = j; 1001 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1002 j++; 1003 if (str[j] == history_expansion_char) 1004 j++; 1005 loop_again = 0; 1006 goto loop; 1007 } 1008 len = i - start; 1009 ADD_STRING(&str[start], len, 0); 1010 1011 if (str[i] == '\0' || str[i] != history_expansion_char) { 1012 len = j - i; 1013 ADD_STRING(&str[i], len, 0); 1014 if (start == 0) 1015 ret = 0; 1016 else 1017 ret = 1; 1018 break; 1019 } 1020 ret = _history_expand_command (str, i, (j - i), &tmp); 1021 if (ret > 0 && tmp) { 1022 len = strlen(tmp); 1023 ADD_STRING(tmp, len, 1); 1024 } 1025 if (tmp) { 1026 el_free(tmp); 1027 tmp = NULL; 1028 } 1029 i = j; 1030 } 1031 1032 /* ret is 2 for "print only" option */ 1033 if (ret == 2) { 1034 add_history(result); 1035 #ifdef GDB_411_HACK 1036 /* gdb 4.11 has been shipped with readline, where */ 1037 /* history_expand() returned -1 when the line */ 1038 /* should not be executed; in readline 2.1+ */ 1039 /* it should return 2 in such a case */ 1040 ret = -1; 1041 #endif 1042 } 1043 el_free(*output); 1044 *output = result; 1045 1046 return ret; 1047 } 1048 1049 /* 1050 * Return a string consisting of arguments of "str" from "start" to "end". 1051 */ 1052 char * 1053 history_arg_extract(int start, int end, const char *str) 1054 { 1055 size_t i, len, max; 1056 char **arr, *result = NULL; 1057 1058 arr = history_tokenize(str); 1059 if (!arr) 1060 return NULL; 1061 if (arr && *arr == NULL) 1062 goto out; 1063 1064 for (max = 0; arr[max]; max++) 1065 continue; 1066 max--; 1067 1068 if (start == '$') 1069 start = (int)max; 1070 if (end == '$') 1071 end = (int)max; 1072 if (end < 0) 1073 end = (int)max + end + 1; 1074 if (start < 0) 1075 start = end; 1076 1077 if (start < 0 || end < 0 || (size_t)start > max || 1078 (size_t)end > max || start > end) 1079 goto out; 1080 1081 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1082 len += strlen(arr[i]) + 1; 1083 len++; 1084 result = el_calloc(len, sizeof(*result)); 1085 if (result == NULL) 1086 goto out; 1087 1088 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1089 (void)strcpy(result + len, arr[i]); 1090 len += strlen(arr[i]); 1091 if (i < (size_t)end) 1092 result[len++] = ' '; 1093 } 1094 result[len] = '\0'; 1095 1096 out: 1097 for (i = 0; arr[i]; i++) 1098 el_free(arr[i]); 1099 el_free(arr); 1100 1101 return result; 1102 } 1103 1104 /* 1105 * Parse the string into individual tokens, 1106 * similar to how shell would do it. 1107 */ 1108 char ** 1109 history_tokenize(const char *str) 1110 { 1111 int size = 1, idx = 0, i, start; 1112 size_t len; 1113 char **result = NULL, *temp, delim = '\0'; 1114 1115 for (i = 0; str[i];) { 1116 while (isspace((unsigned char) str[i])) 1117 i++; 1118 start = i; 1119 for (; str[i];) { 1120 if (str[i] == '\\') { 1121 if (str[i+1] != '\0') 1122 i++; 1123 } else if (str[i] == delim) 1124 delim = '\0'; 1125 else if (!delim && 1126 (isspace((unsigned char) str[i]) || 1127 strchr("()<>;&|$", str[i]))) 1128 break; 1129 else if (!delim && strchr("'`\"", str[i])) 1130 delim = str[i]; 1131 if (str[i]) 1132 i++; 1133 } 1134 1135 if (idx + 2 >= size) { 1136 char **nresult; 1137 size <<= 1; 1138 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1139 if (nresult == NULL) { 1140 el_free(result); 1141 return NULL; 1142 } 1143 result = nresult; 1144 } 1145 len = (size_t)i - (size_t)start; 1146 temp = el_calloc(len + 1, sizeof(*temp)); 1147 if (temp == NULL) { 1148 for (i = 0; i < idx; i++) 1149 el_free(result[i]); 1150 el_free(result); 1151 return NULL; 1152 } 1153 (void)strncpy(temp, &str[start], len); 1154 temp[len] = '\0'; 1155 result[idx++] = temp; 1156 result[idx] = NULL; 1157 if (str[i]) 1158 i++; 1159 } 1160 return result; 1161 } 1162 1163 1164 /* 1165 * limit size of history record to ``max'' events 1166 */ 1167 void 1168 stifle_history(int max) 1169 { 1170 HistEvent ev; 1171 HIST_ENTRY *he; 1172 1173 if (h == NULL || e == NULL) 1174 rl_initialize(); 1175 1176 if (history(h, &ev, H_SETSIZE, max) == 0) { 1177 max_input_history = max; 1178 if (history_length > max) 1179 history_base = history_length - max; 1180 while (history_length > max) { 1181 he = remove_history(0); 1182 el_free(he->data); 1183 el_free((void *)(unsigned long)he->line); 1184 el_free(he); 1185 } 1186 } 1187 } 1188 1189 1190 /* 1191 * "unlimit" size of history - set the limit to maximum allowed int value 1192 */ 1193 int 1194 unstifle_history(void) 1195 { 1196 HistEvent ev; 1197 int omax; 1198 1199 history(h, &ev, H_SETSIZE, INT_MAX); 1200 omax = max_input_history; 1201 max_input_history = INT_MAX; 1202 return omax; /* some value _must_ be returned */ 1203 } 1204 1205 1206 int 1207 history_is_stifled(void) 1208 { 1209 1210 /* cannot return true answer */ 1211 return max_input_history != INT_MAX; 1212 } 1213 1214 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1215 1216 int 1217 history_truncate_file (const char *filename, int nlines) 1218 { 1219 int ret = 0; 1220 FILE *fp, *tp; 1221 char template[sizeof(_history_tmp_template)]; 1222 char buf[4096]; 1223 int fd; 1224 char *cp; 1225 off_t off; 1226 int count = 0; 1227 ssize_t left = 0; 1228 1229 if (filename == NULL && (filename = _default_history_file()) == NULL) 1230 return errno; 1231 if ((fp = fopen(filename, "r+")) == NULL) 1232 return errno; 1233 strcpy(template, _history_tmp_template); 1234 if ((fd = mkstemp(template)) == -1) { 1235 ret = errno; 1236 goto out1; 1237 } 1238 1239 if ((tp = fdopen(fd, "r+")) == NULL) { 1240 close(fd); 1241 ret = errno; 1242 goto out2; 1243 } 1244 1245 for(;;) { 1246 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1247 if (ferror(fp)) { 1248 ret = errno; 1249 break; 1250 } 1251 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1252 (off_t)-1) { 1253 ret = errno; 1254 break; 1255 } 1256 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1257 if (ferror(fp)) { 1258 ret = errno; 1259 break; 1260 } 1261 if (left == 0) { 1262 count--; 1263 left = sizeof(buf); 1264 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1265 != 1) { 1266 ret = errno; 1267 break; 1268 } 1269 fflush(tp); 1270 break; 1271 } 1272 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1273 ret = errno; 1274 break; 1275 } 1276 count++; 1277 } 1278 if (ret) 1279 goto out3; 1280 cp = buf + left - 1; 1281 if(*cp != '\n') 1282 cp++; 1283 for(;;) { 1284 while (--cp >= buf) { 1285 if (*cp == '\n') { 1286 if (--nlines == 0) { 1287 if (++cp >= buf + sizeof(buf)) { 1288 count++; 1289 cp = buf; 1290 } 1291 break; 1292 } 1293 } 1294 } 1295 if (nlines <= 0 || count == 0) 1296 break; 1297 count--; 1298 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1299 ret = errno; 1300 break; 1301 } 1302 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1303 if (ferror(tp)) { 1304 ret = errno; 1305 break; 1306 } 1307 ret = EAGAIN; 1308 break; 1309 } 1310 cp = buf + sizeof(buf); 1311 } 1312 1313 if (ret || nlines > 0) 1314 goto out3; 1315 1316 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1317 ret = errno; 1318 goto out3; 1319 } 1320 1321 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1322 (off_t)-1) { 1323 ret = errno; 1324 goto out3; 1325 } 1326 1327 for(;;) { 1328 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1329 if (ferror(fp)) 1330 ret = errno; 1331 break; 1332 } 1333 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1334 ret = errno; 1335 break; 1336 } 1337 } 1338 fflush(fp); 1339 if((off = ftello(fp)) > 0) 1340 (void)ftruncate(fileno(fp), off); 1341 out3: 1342 fclose(tp); 1343 out2: 1344 unlink(template); 1345 out1: 1346 fclose(fp); 1347 1348 return ret; 1349 } 1350 1351 1352 /* 1353 * read history from a file given 1354 */ 1355 int 1356 read_history(const char *filename) 1357 { 1358 HistEvent ev; 1359 1360 if (h == NULL || e == NULL) 1361 rl_initialize(); 1362 if (filename == NULL && (filename = _default_history_file()) == NULL) 1363 return errno; 1364 errno = 0; 1365 if (history(h, &ev, H_LOAD, filename) == -1) 1366 return errno ? errno : EINVAL; 1367 if (history(h, &ev, H_GETSIZE) == 0) 1368 history_length = ev.num; 1369 if (history_length < 0) 1370 return EINVAL; 1371 return 0; 1372 } 1373 1374 1375 /* 1376 * write history to a file given 1377 */ 1378 int 1379 write_history(const char *filename) 1380 { 1381 HistEvent ev; 1382 1383 if (h == NULL || e == NULL) 1384 rl_initialize(); 1385 if (filename == NULL && (filename = _default_history_file()) == NULL) 1386 return errno; 1387 return history(h, &ev, H_SAVE, filename) == -1 ? 1388 (errno ? errno : EINVAL) : 0; 1389 } 1390 1391 int 1392 append_history(int n, const char *filename) 1393 { 1394 HistEvent ev; 1395 FILE *fp; 1396 1397 if (h == NULL || e == NULL) 1398 rl_initialize(); 1399 if (filename == NULL && (filename = _default_history_file()) == NULL) 1400 return errno; 1401 1402 if ((fp = fopen(filename, "a")) == NULL) 1403 return errno; 1404 1405 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1406 int serrno = errno ? errno : EINVAL; 1407 fclose(fp); 1408 return serrno; 1409 } 1410 fclose(fp); 1411 return 0; 1412 } 1413 1414 /* 1415 * returns history ``num''th event 1416 * 1417 * returned pointer points to static variable 1418 */ 1419 HIST_ENTRY * 1420 history_get(int num) 1421 { 1422 static HIST_ENTRY she; 1423 HistEvent ev; 1424 int curr_num; 1425 1426 if (h == NULL || e == NULL) 1427 rl_initialize(); 1428 1429 if (num < history_base) 1430 return NULL; 1431 1432 /* save current position */ 1433 if (history(h, &ev, H_CURR) != 0) 1434 return NULL; 1435 curr_num = ev.num; 1436 1437 /* 1438 * use H_DELDATA to set to nth history (without delete) by passing 1439 * (void **)-1 -- as in history_set_pos 1440 */ 1441 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1442 goto out; 1443 1444 /* get current entry */ 1445 if (history(h, &ev, H_CURR) != 0) 1446 goto out; 1447 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1448 goto out; 1449 she.line = ev.str; 1450 1451 /* restore pointer to where it was */ 1452 (void)history(h, &ev, H_SET, curr_num); 1453 1454 return &she; 1455 1456 out: 1457 /* restore pointer to where it was */ 1458 (void)history(h, &ev, H_SET, curr_num); 1459 return NULL; 1460 } 1461 1462 1463 /* 1464 * add the line to history table 1465 */ 1466 int 1467 add_history(const char *line) 1468 { 1469 HistEvent ev; 1470 1471 if (h == NULL || e == NULL) 1472 rl_initialize(); 1473 1474 if (history(h, &ev, H_ENTER, line) == -1) 1475 return 0; 1476 1477 (void)history(h, &ev, H_GETSIZE); 1478 if (ev.num == history_length) 1479 history_base++; 1480 else { 1481 history_offset++; 1482 history_length = ev.num; 1483 } 1484 return 0; 1485 } 1486 1487 1488 /* 1489 * remove the specified entry from the history list and return it. 1490 */ 1491 HIST_ENTRY * 1492 remove_history(int num) 1493 { 1494 HIST_ENTRY *he; 1495 HistEvent ev; 1496 1497 if (h == NULL || e == NULL) 1498 rl_initialize(); 1499 1500 if ((he = el_malloc(sizeof(*he))) == NULL) 1501 return NULL; 1502 1503 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1504 el_free(he); 1505 return NULL; 1506 } 1507 1508 he->line = ev.str; 1509 if (history(h, &ev, H_GETSIZE) == 0) 1510 history_length = ev.num; 1511 1512 return he; 1513 } 1514 1515 1516 /* 1517 * replace the line and data of the num-th entry 1518 */ 1519 HIST_ENTRY * 1520 replace_history_entry(int num, const char *line, histdata_t data) 1521 { 1522 HIST_ENTRY *he; 1523 HistEvent ev; 1524 int curr_num; 1525 1526 if (h == NULL || e == NULL) 1527 rl_initialize(); 1528 1529 /* save current position */ 1530 if (history(h, &ev, H_CURR) != 0) 1531 return NULL; 1532 curr_num = ev.num; 1533 1534 /* start from the oldest */ 1535 if (history(h, &ev, H_LAST) != 0) 1536 return NULL; /* error */ 1537 1538 if ((he = el_malloc(sizeof(*he))) == NULL) 1539 return NULL; 1540 1541 /* look forwards for event matching specified offset */ 1542 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1543 goto out; 1544 1545 he->line = strdup(ev.str); 1546 if (he->line == NULL) 1547 goto out; 1548 1549 if (history(h, &ev, H_REPLACE, line, data)) 1550 goto out; 1551 1552 /* restore pointer to where it was */ 1553 if (history(h, &ev, H_SET, curr_num)) 1554 goto out; 1555 1556 return he; 1557 out: 1558 el_free(he); 1559 return NULL; 1560 } 1561 1562 /* 1563 * clear the history list - delete all entries 1564 */ 1565 void 1566 clear_history(void) 1567 { 1568 HistEvent ev; 1569 1570 if (h == NULL || e == NULL) 1571 rl_initialize(); 1572 1573 (void)history(h, &ev, H_CLEAR); 1574 history_offset = history_length = 0; 1575 } 1576 1577 1578 /* 1579 * returns offset of the current history event 1580 */ 1581 int 1582 where_history(void) 1583 { 1584 return history_offset; 1585 } 1586 1587 static HIST_ENTRY **_history_listp; 1588 static HIST_ENTRY *_history_list; 1589 1590 HIST_ENTRY ** 1591 history_list(void) 1592 { 1593 HistEvent ev; 1594 HIST_ENTRY **nlp, *nl; 1595 int i; 1596 1597 if (history(h, &ev, H_LAST) != 0) 1598 return NULL; 1599 1600 if ((nlp = el_realloc(_history_listp, 1601 ((size_t)history_length + 1) * sizeof(*nlp))) == NULL) 1602 return NULL; 1603 _history_listp = nlp; 1604 1605 if ((nl = el_realloc(_history_list, 1606 (size_t)history_length * sizeof(*nl))) == NULL) 1607 return NULL; 1608 _history_list = nl; 1609 1610 i = 0; 1611 do { 1612 _history_listp[i] = &_history_list[i]; 1613 _history_list[i].line = ev.str; 1614 _history_list[i].data = NULL; 1615 if (i++ == history_length) 1616 abort(); 1617 } while (history(h, &ev, H_PREV) == 0); 1618 _history_listp[i] = NULL; 1619 return _history_listp; 1620 } 1621 1622 /* 1623 * returns current history event or NULL if there is no such event 1624 */ 1625 HIST_ENTRY * 1626 current_history(void) 1627 { 1628 HistEvent ev; 1629 1630 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1631 return NULL; 1632 1633 rl_he.line = ev.str; 1634 rl_he.data = NULL; 1635 return &rl_he; 1636 } 1637 1638 1639 /* 1640 * returns total number of bytes history events' data are using 1641 */ 1642 int 1643 history_total_bytes(void) 1644 { 1645 HistEvent ev; 1646 int curr_num; 1647 size_t size; 1648 1649 if (history(h, &ev, H_CURR) != 0) 1650 return -1; 1651 curr_num = ev.num; 1652 1653 (void)history(h, &ev, H_FIRST); 1654 size = 0; 1655 do 1656 size += strlen(ev.str) * sizeof(*ev.str); 1657 while (history(h, &ev, H_NEXT) == 0); 1658 1659 /* get to the same position as before */ 1660 history(h, &ev, H_PREV_EVENT, curr_num); 1661 1662 return (int)size; 1663 } 1664 1665 1666 /* 1667 * sets the position in the history list to ``pos'' 1668 */ 1669 int 1670 history_set_pos(int pos) 1671 { 1672 if (pos >= history_length || pos < 0) 1673 return 0; 1674 1675 history_offset = pos; 1676 return 1; 1677 } 1678 1679 1680 /* 1681 * returns previous event in history and shifts pointer accordingly 1682 * Note that readline and editline define directions in opposite ways. 1683 */ 1684 HIST_ENTRY * 1685 previous_history(void) 1686 { 1687 HistEvent ev; 1688 1689 if (history_offset == 0) 1690 return NULL; 1691 1692 if (history(h, &ev, H_LAST) != 0) 1693 return NULL; 1694 1695 history_offset--; 1696 return current_history(); 1697 } 1698 1699 1700 /* 1701 * returns next event in history and shifts pointer accordingly 1702 */ 1703 HIST_ENTRY * 1704 next_history(void) 1705 { 1706 HistEvent ev; 1707 1708 if (history_offset >= history_length) 1709 return NULL; 1710 1711 if (history(h, &ev, H_LAST) != 0) 1712 return NULL; 1713 1714 history_offset++; 1715 return current_history(); 1716 } 1717 1718 1719 /* 1720 * searches for first history event containing the str 1721 */ 1722 int 1723 history_search(const char *str, int direction) 1724 { 1725 HistEvent ev; 1726 const char *strp; 1727 int curr_num; 1728 1729 if (history(h, &ev, H_CURR) != 0) 1730 return -1; 1731 curr_num = ev.num; 1732 1733 for (;;) { 1734 if ((strp = strstr(ev.str, str)) != NULL) 1735 return (int)(strp - ev.str); 1736 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1737 break; 1738 } 1739 (void)history(h, &ev, H_SET, curr_num); 1740 return -1; 1741 } 1742 1743 1744 /* 1745 * searches for first history event beginning with str 1746 */ 1747 int 1748 history_search_prefix(const char *str, int direction) 1749 { 1750 HistEvent ev; 1751 1752 return (history(h, &ev, direction < 0 ? 1753 H_PREV_STR : H_NEXT_STR, str)); 1754 } 1755 1756 1757 /* 1758 * search for event in history containing str, starting at offset 1759 * abs(pos); continue backward, if pos<0, forward otherwise 1760 */ 1761 /* ARGSUSED */ 1762 int 1763 history_search_pos(const char *str, 1764 int direction __attribute__((__unused__)), int pos) 1765 { 1766 HistEvent ev; 1767 int curr_num, off; 1768 1769 off = (pos > 0) ? pos : -pos; 1770 pos = (pos > 0) ? 1 : -1; 1771 1772 if (history(h, &ev, H_CURR) != 0) 1773 return -1; 1774 curr_num = ev.num; 1775 1776 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1777 return -1; 1778 1779 for (;;) { 1780 if (strstr(ev.str, str)) 1781 return off; 1782 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1783 break; 1784 } 1785 1786 /* set "current" pointer back to previous state */ 1787 (void)history(h, &ev, 1788 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1789 1790 return -1; 1791 } 1792 1793 1794 /********************************/ 1795 /* completion functions */ 1796 1797 char * 1798 tilde_expand(char *name) 1799 { 1800 return fn_tilde_expand(name); 1801 } 1802 1803 char * 1804 filename_completion_function(const char *name, int state) 1805 { 1806 return fn_filename_completion_function(name, state); 1807 } 1808 1809 /* 1810 * a completion generator for usernames; returns _first_ username 1811 * which starts with supplied text 1812 * text contains a partial username preceded by random character 1813 * (usually '~'); state resets search from start (??? should we do that anyway) 1814 * it's the caller's responsibility to free the returned value 1815 */ 1816 char * 1817 username_completion_function(const char *text, int state) 1818 { 1819 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1820 struct passwd pwres; 1821 char pwbuf[1024]; 1822 #endif 1823 struct passwd *pass = NULL; 1824 1825 if (text[0] == '\0') 1826 return NULL; 1827 1828 if (*text == '~') 1829 text++; 1830 1831 if (state == 0) 1832 setpwent(); 1833 1834 while ( 1835 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1836 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1837 #else 1838 (pass = getpwent()) != NULL 1839 #endif 1840 && text[0] == pass->pw_name[0] 1841 && strcmp(text, pass->pw_name) == 0) 1842 continue; 1843 1844 if (pass == NULL) { 1845 endpwent(); 1846 return NULL; 1847 } 1848 return strdup(pass->pw_name); 1849 } 1850 1851 1852 /* 1853 * el-compatible wrapper to send TSTP on ^Z 1854 */ 1855 /* ARGSUSED */ 1856 static unsigned char 1857 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1858 { 1859 (void)kill(0, SIGTSTP); 1860 return CC_NORM; 1861 } 1862 1863 static const char * 1864 /*ARGSUSED*/ 1865 _rl_completion_append_character_function(const char *dummy 1866 __attribute__((__unused__))) 1867 { 1868 static char buf[2]; 1869 buf[0] = (char)rl_completion_append_character; 1870 buf[1] = '\0'; 1871 return buf; 1872 } 1873 1874 1875 /* 1876 * Display list of strings in columnar format on readline's output stream. 1877 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1878 * 'max' is maximum length of string in 'matches'. 1879 */ 1880 void 1881 rl_display_match_list(char **matches, int len, int max) 1882 { 1883 1884 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1885 _rl_completion_append_character_function); 1886 } 1887 1888 /* 1889 * complete word at current point 1890 */ 1891 /* ARGSUSED */ 1892 int 1893 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1894 { 1895 static ct_buffer_t wbreak_conv, sprefix_conv; 1896 const char *breakchars; 1897 1898 if (h == NULL || e == NULL) 1899 rl_initialize(); 1900 1901 if (rl_inhibit_completion) { 1902 char arr[2]; 1903 arr[0] = (char)invoking_key; 1904 arr[1] = '\0'; 1905 el_insertstr(e, arr); 1906 return CC_REFRESH; 1907 } 1908 1909 if (rl_completion_word_break_hook != NULL) 1910 breakchars = (*rl_completion_word_break_hook)(); 1911 else 1912 breakchars = rl_basic_word_break_characters; 1913 1914 _rl_update_pos(); 1915 1916 /* Just look at how many global variables modify this operation! */ 1917 return fn_complete(e, 1918 (rl_compentry_func_t *)rl_completion_entry_function, 1919 rl_attempted_completion_function, 1920 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1921 ct_decode_string(breakchars, &sprefix_conv), 1922 _rl_completion_append_character_function, 1923 (size_t)rl_completion_query_items, 1924 &rl_completion_type, &rl_attempted_completion_over, 1925 &rl_point, &rl_end); 1926 1927 1928 } 1929 1930 1931 /* ARGSUSED */ 1932 static unsigned char 1933 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1934 { 1935 return (unsigned char)rl_complete(0, ch); 1936 } 1937 1938 /* 1939 * misc other functions 1940 */ 1941 1942 /* 1943 * bind key c to readline-type function func 1944 */ 1945 int 1946 rl_bind_key(int c, rl_command_func_t *func) 1947 { 1948 int retval = -1; 1949 1950 if (h == NULL || e == NULL) 1951 rl_initialize(); 1952 1953 if (func == rl_insert) { 1954 /* XXX notice there is no range checking of ``c'' */ 1955 e->el_map.key[c] = ED_INSERT; 1956 retval = 0; 1957 } 1958 return retval; 1959 } 1960 1961 1962 /* 1963 * read one key from input - handles chars pushed back 1964 * to input stream also 1965 */ 1966 int 1967 rl_read_key(void) 1968 { 1969 char fooarr[2 * sizeof(int)]; 1970 1971 if (e == NULL || h == NULL) 1972 rl_initialize(); 1973 1974 return el_getc(e, fooarr); 1975 } 1976 1977 1978 /* 1979 * reset the terminal 1980 */ 1981 /* ARGSUSED */ 1982 int 1983 rl_reset_terminal(const char *p __attribute__((__unused__))) 1984 { 1985 1986 if (h == NULL || e == NULL) 1987 rl_initialize(); 1988 el_reset(e); 1989 return 0; 1990 } 1991 1992 1993 /* 1994 * insert character ``c'' back into input stream, ``count'' times 1995 */ 1996 int 1997 rl_insert(int count, int c) 1998 { 1999 char arr[2]; 2000 2001 if (h == NULL || e == NULL) 2002 rl_initialize(); 2003 2004 /* XXX - int -> char conversion can lose on multichars */ 2005 arr[0] = (char)c; 2006 arr[1] = '\0'; 2007 2008 for (; count > 0; count--) 2009 el_push(e, arr); 2010 2011 return 0; 2012 } 2013 2014 int 2015 rl_insert_text(const char *text) 2016 { 2017 if (!text || *text == 0) 2018 return 0; 2019 2020 if (h == NULL || e == NULL) 2021 rl_initialize(); 2022 2023 if (el_insertstr(e, text) < 0) 2024 return 0; 2025 return (int)strlen(text); 2026 } 2027 2028 /*ARGSUSED*/ 2029 int 2030 rl_newline(int count __attribute__((__unused__)), 2031 int c __attribute__((__unused__))) 2032 { 2033 /* 2034 * Readline-4.0 appears to ignore the args. 2035 */ 2036 return rl_insert(1, '\n'); 2037 } 2038 2039 /*ARGSUSED*/ 2040 static unsigned char 2041 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2042 { 2043 if (map[c] == NULL) 2044 return CC_ERROR; 2045 2046 _rl_update_pos(); 2047 2048 (*map[c])(1, c); 2049 2050 /* If rl_done was set by the above call, deal with it here */ 2051 if (rl_done) 2052 return CC_EOF; 2053 2054 return CC_NORM; 2055 } 2056 2057 int 2058 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2059 { 2060 char dest[8]; 2061 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2062 return -1; 2063 map[(unsigned char)c] = fun; 2064 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2065 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2066 el_set(e, EL_BIND, dest, name, NULL); 2067 return 0; 2068 } 2069 2070 void 2071 rl_callback_read_char(void) 2072 { 2073 int count = 0, done = 0; 2074 const char *buf = el_gets(e, &count); 2075 char *wbuf; 2076 2077 if (buf == NULL || count-- <= 0) 2078 return; 2079 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2080 done = 1; 2081 if (buf[count] == '\n' || buf[count] == '\r') 2082 done = 2; 2083 2084 if (done && rl_linefunc != NULL) { 2085 el_set(e, EL_UNBUFFERED, 0); 2086 if (done == 2) { 2087 if ((wbuf = strdup(buf)) != NULL) 2088 wbuf[count] = '\0'; 2089 } else 2090 wbuf = NULL; 2091 (*(void (*)(const char *))rl_linefunc)(wbuf); 2092 el_set(e, EL_UNBUFFERED, 1); 2093 } 2094 } 2095 2096 void 2097 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2098 { 2099 if (e == NULL) { 2100 rl_initialize(); 2101 } 2102 (void)rl_set_prompt(prompt); 2103 rl_linefunc = linefunc; 2104 el_set(e, EL_UNBUFFERED, 1); 2105 } 2106 2107 void 2108 rl_callback_handler_remove(void) 2109 { 2110 rl_linefunc = NULL; 2111 el_end(e); 2112 e = NULL; 2113 } 2114 2115 void 2116 rl_redisplay(void) 2117 { 2118 char a[2]; 2119 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2120 a[1] = '\0'; 2121 el_push(e, a); 2122 } 2123 2124 int 2125 rl_get_previous_history(int count, int key) 2126 { 2127 char a[2]; 2128 a[0] = (char)key; 2129 a[1] = '\0'; 2130 while (count--) 2131 el_push(e, a); 2132 return 0; 2133 } 2134 2135 void 2136 /*ARGSUSED*/ 2137 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2138 { 2139 el_set(e, EL_PREP_TERM, 1); 2140 } 2141 2142 void 2143 rl_deprep_terminal(void) 2144 { 2145 el_set(e, EL_PREP_TERM, 0); 2146 } 2147 2148 int 2149 rl_read_init_file(const char *s) 2150 { 2151 return el_source(e, s); 2152 } 2153 2154 int 2155 rl_parse_and_bind(const char *line) 2156 { 2157 const char **argv; 2158 int argc; 2159 Tokenizer *tok; 2160 2161 tok = tok_init(NULL); 2162 tok_str(tok, line, &argc, &argv); 2163 argc = el_parse(e, argc, argv); 2164 tok_end(tok); 2165 return argc ? 1 : 0; 2166 } 2167 2168 int 2169 rl_variable_bind(const char *var, const char *value) 2170 { 2171 /* 2172 * The proper return value is undocument, but this is what the 2173 * readline source seems to do. 2174 */ 2175 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2176 } 2177 2178 int 2179 rl_stuff_char(int c) 2180 { 2181 char buf[2]; 2182 2183 buf[0] = (char)c; 2184 buf[1] = '\0'; 2185 el_insertstr(e, buf); 2186 return 1; 2187 } 2188 2189 static int 2190 _rl_event_read_char(EditLine *el, wchar_t *wc) 2191 { 2192 char ch; 2193 int n; 2194 ssize_t num_read = 0; 2195 2196 ch = '\0'; 2197 *wc = L'\0'; 2198 while (rl_event_hook) { 2199 2200 (*rl_event_hook)(); 2201 2202 #if defined(FIONREAD) 2203 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2204 return -1; 2205 if (n) 2206 num_read = read(el->el_infd, &ch, (size_t)1); 2207 else 2208 num_read = 0; 2209 #elif defined(F_SETFL) && defined(O_NDELAY) 2210 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2211 return -1; 2212 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2213 return -1; 2214 num_read = read(el->el_infd, &ch, 1); 2215 if (fcntl(el->el_infd, F_SETFL, n)) 2216 return -1; 2217 #else 2218 /* not non-blocking, but what you gonna do? */ 2219 num_read = read(el->el_infd, &ch, 1); 2220 return -1; 2221 #endif 2222 2223 if (num_read < 0 && errno == EAGAIN) 2224 continue; 2225 if (num_read == 0) 2226 continue; 2227 break; 2228 } 2229 if (!rl_event_hook) 2230 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2231 *wc = (wchar_t)ch; 2232 return (int)num_read; 2233 } 2234 2235 static void 2236 _rl_update_pos(void) 2237 { 2238 const LineInfo *li = el_line(e); 2239 2240 rl_point = (int)(li->cursor - li->buffer); 2241 rl_end = (int)(li->lastchar - li->buffer); 2242 rl_line_buffer[rl_end] = '\0'; 2243 } 2244 2245 void 2246 rl_get_screen_size(int *rows, int *cols) 2247 { 2248 if (rows) 2249 el_get(e, EL_GETTC, "li", rows); 2250 if (cols) 2251 el_get(e, EL_GETTC, "co", cols); 2252 } 2253 2254 void 2255 rl_set_screen_size(int rows, int cols) 2256 { 2257 char buf[64]; 2258 (void)snprintf(buf, sizeof(buf), "%d", rows); 2259 el_set(e, EL_SETTC, "li", buf, NULL); 2260 (void)snprintf(buf, sizeof(buf), "%d", cols); 2261 el_set(e, EL_SETTC, "co", buf, NULL); 2262 } 2263 2264 char ** 2265 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2266 { 2267 size_t len, max, i, j, min; 2268 char **list, *match, *a, *b; 2269 2270 len = 1; 2271 max = 10; 2272 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2273 return NULL; 2274 2275 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2276 list[len++] = match; 2277 if (len == max) { 2278 char **nl; 2279 max += 10; 2280 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2281 goto out; 2282 list = nl; 2283 } 2284 } 2285 if (len == 1) 2286 goto out; 2287 list[len] = NULL; 2288 if (len == 2) { 2289 if ((list[0] = strdup(list[1])) == NULL) 2290 goto out; 2291 return list; 2292 } 2293 qsort(&list[1], len - 1, sizeof(*list), 2294 (int (*)(const void *, const void *)) strcmp); 2295 min = SIZE_MAX; 2296 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2297 b = list[i + 1]; 2298 for (j = 0; a[j] && a[j] == b[j]; j++) 2299 continue; 2300 if (min > j) 2301 min = j; 2302 } 2303 if (min == 0 && *str) { 2304 if ((list[0] = strdup(str)) == NULL) 2305 goto out; 2306 } else { 2307 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2308 goto out; 2309 (void)memcpy(list[0], list[1], min); 2310 list[0][min] = '\0'; 2311 } 2312 return list; 2313 2314 out: 2315 el_free(list); 2316 return NULL; 2317 } 2318 2319 char * 2320 rl_filename_completion_function (const char *text, int state) 2321 { 2322 return fn_filename_completion_function(text, state); 2323 } 2324 2325 void 2326 rl_forced_update_display(void) 2327 { 2328 el_set(e, EL_REFRESH); 2329 } 2330 2331 int 2332 _rl_abort_internal(void) 2333 { 2334 el_beep(e); 2335 longjmp(topbuf, 1); 2336 /*NOTREACHED*/ 2337 } 2338 2339 int 2340 _rl_qsort_string_compare(char **s1, char **s2) 2341 { 2342 return strcoll(*s1, *s2); 2343 } 2344 2345 HISTORY_STATE * 2346 history_get_history_state(void) 2347 { 2348 HISTORY_STATE *hs; 2349 2350 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2351 return NULL; 2352 hs->length = history_length; 2353 return hs; 2354 } 2355 2356 int 2357 /*ARGSUSED*/ 2358 rl_kill_text(int from __attribute__((__unused__)), 2359 int to __attribute__((__unused__))) 2360 { 2361 return 0; 2362 } 2363 2364 Keymap 2365 rl_make_bare_keymap(void) 2366 { 2367 return NULL; 2368 } 2369 2370 Keymap 2371 rl_get_keymap(void) 2372 { 2373 return NULL; 2374 } 2375 2376 void 2377 /*ARGSUSED*/ 2378 rl_set_keymap(Keymap k __attribute__((__unused__))) 2379 { 2380 } 2381 2382 int 2383 /*ARGSUSED*/ 2384 rl_generic_bind(int type __attribute__((__unused__)), 2385 const char * keyseq __attribute__((__unused__)), 2386 const char * data __attribute__((__unused__)), 2387 Keymap k __attribute__((__unused__))) 2388 { 2389 return 0; 2390 } 2391 2392 int 2393 /*ARGSUSED*/ 2394 rl_bind_key_in_map(int key __attribute__((__unused__)), 2395 rl_command_func_t *fun __attribute__((__unused__)), 2396 Keymap k __attribute__((__unused__))) 2397 { 2398 return 0; 2399 } 2400 2401 /* unsupported, but needed by python */ 2402 void 2403 rl_cleanup_after_signal(void) 2404 { 2405 } 2406 2407 int 2408 rl_on_new_line(void) 2409 { 2410 return 0; 2411 } 2412 2413 void 2414 rl_free_line_state(void) 2415 { 2416 } 2417 2418 int 2419 /*ARGSUSED*/ 2420 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2421 { 2422 return 0; 2423 } 2424 2425 void 2426 rl_resize_terminal(void) 2427 { 2428 el_resize(e); 2429 } 2430 2431 void 2432 rl_reset_after_signal(void) 2433 { 2434 if (rl_prep_term_function) 2435 (*rl_prep_term_function)(); 2436 } 2437 2438 void 2439 rl_echo_signal_char(int sig) 2440 { 2441 int c = tty_get_signal_character(e, sig); 2442 if (c == -1) 2443 return; 2444 re_putc(e, c, 0); 2445 } 2446