1 /* $NetBSD: readline.c,v 1.159 2019/10/09 14:31:07 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 1.159 2019/10/09 14:31:07 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 memcpy(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)strlcpy(pat, cmd + begin, len + 1); 611 } 612 613 if (history(h, &ev, H_CURR) != 0) { 614 if (pat != last_search_pat) 615 el_free(pat); 616 return NULL; 617 } 618 num = ev.num; 619 620 if (sub) { 621 if (pat != last_search_pat) { 622 if (last_search_pat) 623 el_free(last_search_pat); 624 last_search_pat = pat; 625 } 626 ret = history_search(pat, -1); 627 } else 628 ret = history_search_prefix(pat, -1); 629 630 if (ret == -1) { 631 /* restore to end of list on failed search */ 632 history(h, &ev, H_FIRST); 633 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 634 if (pat != last_search_pat) 635 el_free(pat); 636 return NULL; 637 } 638 639 if (sub && len) { 640 if (last_search_match && last_search_match != pat) 641 el_free(last_search_match); 642 last_search_match = pat; 643 } 644 645 if (pat != last_search_pat) 646 el_free(pat); 647 648 if (history(h, &ev, H_CURR) != 0) 649 return NULL; 650 *cindex = idx; 651 rptr = ev.str; 652 653 /* roll back to original position */ 654 (void)history(h, &ev, H_SET, num); 655 656 return rptr; 657 } 658 659 /* 660 * the real function doing history expansion - takes as argument command 661 * to do and data upon which the command should be executed 662 * does expansion the way I've understood readline documentation 663 * 664 * returns 0 if data was not modified, 1 if it was and 2 if the string 665 * should be only printed and not executed; in case of error, 666 * returns -1 and *result points to NULL 667 * it's the caller's responsibility to free() the string returned in *result 668 */ 669 static int 670 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 671 char **result) 672 { 673 char *tmp, *search = NULL, *aptr; 674 const char *ptr, *cmd; 675 static char *from = NULL, *to = NULL; 676 int start, end, idx, has_mods = 0; 677 int p_on = 0, g_on = 0; 678 679 *result = NULL; 680 aptr = NULL; 681 ptr = NULL; 682 683 /* First get event specifier */ 684 idx = 0; 685 686 if (strchr(":^*$", command[offs + 1])) { 687 char str[4]; 688 /* 689 * "!:" is shorthand for "!!:". 690 * "!^", "!*" and "!$" are shorthand for 691 * "!!:^", "!!:*" and "!!:$" respectively. 692 */ 693 str[0] = str[1] = '!'; 694 str[2] = '0'; 695 ptr = get_history_event(str, &idx, 0); 696 idx = (command[offs + 1] == ':')? 1:0; 697 has_mods = 1; 698 } else { 699 if (command[offs + 1] == '#') { 700 /* use command so far */ 701 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 702 == NULL) 703 return -1; 704 (void)strlcpy(aptr, command, offs + 1); 705 idx = 1; 706 } else { 707 int qchar; 708 709 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 710 ptr = get_history_event(command + offs, &idx, qchar); 711 } 712 has_mods = command[offs + (size_t)idx] == ':'; 713 } 714 715 if (ptr == NULL && aptr == NULL) 716 return -1; 717 718 if (!has_mods) { 719 *result = strdup(aptr ? aptr : ptr); 720 if (aptr) 721 el_free(aptr); 722 if (*result == NULL) 723 return -1; 724 return 1; 725 } 726 727 cmd = command + offs + idx + 1; 728 729 /* Now parse any word designators */ 730 731 if (*cmd == '%') /* last word matched by ?pat? */ 732 tmp = strdup(last_search_match? last_search_match:""); 733 else if (strchr("^*$-0123456789", *cmd)) { 734 start = end = -1; 735 if (*cmd == '^') 736 start = end = 1, cmd++; 737 else if (*cmd == '$') 738 start = -1, cmd++; 739 else if (*cmd == '*') 740 start = 1, cmd++; 741 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 742 start = 0; 743 while (*cmd && '0' <= *cmd && *cmd <= '9') 744 start = start * 10 + *cmd++ - '0'; 745 746 if (*cmd == '-') { 747 if (isdigit((unsigned char) cmd[1])) { 748 cmd++; 749 end = 0; 750 while (*cmd && '0' <= *cmd && *cmd <= '9') 751 end = end * 10 + *cmd++ - '0'; 752 } else if (cmd[1] == '$') { 753 cmd += 2; 754 end = -1; 755 } else { 756 cmd++; 757 end = -2; 758 } 759 } else if (*cmd == '*') 760 end = -1, cmd++; 761 else 762 end = start; 763 } 764 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 765 if (tmp == NULL) { 766 (void)fprintf(rl_outstream, "%s: Bad word specifier", 767 command + offs + idx); 768 if (aptr) 769 el_free(aptr); 770 return -1; 771 } 772 } else 773 tmp = strdup(aptr? aptr:ptr); 774 775 if (aptr) 776 el_free(aptr); 777 778 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 779 *result = tmp; 780 return 1; 781 } 782 783 for (; *cmd; cmd++) { 784 if (*cmd == ':') 785 continue; 786 else if (*cmd == 'h') { /* remove trailing path */ 787 if ((aptr = strrchr(tmp, '/')) != NULL) 788 *aptr = '\0'; 789 } else if (*cmd == 't') { /* remove leading path */ 790 if ((aptr = strrchr(tmp, '/')) != NULL) { 791 aptr = strdup(aptr + 1); 792 el_free(tmp); 793 tmp = aptr; 794 } 795 } else if (*cmd == 'r') { /* remove trailing suffix */ 796 if ((aptr = strrchr(tmp, '.')) != NULL) 797 *aptr = '\0'; 798 } else if (*cmd == 'e') { /* remove all but suffix */ 799 if ((aptr = strrchr(tmp, '.')) != NULL) { 800 aptr = strdup(aptr); 801 el_free(tmp); 802 tmp = aptr; 803 } 804 } else if (*cmd == 'p') /* print only */ 805 p_on = 1; 806 else if (*cmd == 'g') 807 g_on = 2; 808 else if (*cmd == 's' || *cmd == '&') { 809 char *what, *with, delim; 810 size_t len, from_len; 811 size_t size; 812 813 if (*cmd == '&' && (from == NULL || to == NULL)) 814 continue; 815 else if (*cmd == 's') { 816 delim = *(++cmd), cmd++; 817 size = 16; 818 what = el_realloc(from, size * sizeof(*what)); 819 if (what == NULL) { 820 el_free(from); 821 el_free(tmp); 822 return 0; 823 } 824 len = 0; 825 for (; *cmd && *cmd != delim; cmd++) { 826 if (*cmd == '\\' && cmd[1] == delim) 827 cmd++; 828 if (len >= size) { 829 char *nwhat; 830 nwhat = el_realloc(what, 831 (size <<= 1) * 832 sizeof(*nwhat)); 833 if (nwhat == NULL) { 834 el_free(what); 835 el_free(tmp); 836 return 0; 837 } 838 what = nwhat; 839 } 840 what[len++] = *cmd; 841 } 842 what[len] = '\0'; 843 from = what; 844 if (*what == '\0') { 845 el_free(what); 846 if (search) { 847 from = strdup(search); 848 if (from == NULL) { 849 el_free(tmp); 850 return 0; 851 } 852 } else { 853 from = NULL; 854 el_free(tmp); 855 return -1; 856 } 857 } 858 cmd++; /* shift after delim */ 859 if (!*cmd) 860 continue; 861 862 size = 16; 863 with = el_realloc(to, size * sizeof(*with)); 864 if (with == NULL) { 865 el_free(to); 866 el_free(tmp); 867 return -1; 868 } 869 len = 0; 870 from_len = strlen(from); 871 for (; *cmd && *cmd != delim; cmd++) { 872 if (len + from_len + 1 >= size) { 873 char *nwith; 874 size += from_len + 1; 875 nwith = el_realloc(with, 876 size * sizeof(*nwith)); 877 if (nwith == NULL) { 878 el_free(with); 879 el_free(tmp); 880 return -1; 881 } 882 with = nwith; 883 } 884 if (*cmd == '&') { 885 /* safe */ 886 (void)strcpy(&with[len], from); 887 len += from_len; 888 continue; 889 } 890 if (*cmd == '\\' 891 && (*(cmd + 1) == delim 892 || *(cmd + 1) == '&')) 893 cmd++; 894 with[len++] = *cmd; 895 } 896 with[len] = '\0'; 897 to = with; 898 } 899 900 aptr = _rl_compat_sub(tmp, from, to, g_on); 901 if (aptr) { 902 el_free(tmp); 903 tmp = aptr; 904 } 905 g_on = 0; 906 } 907 } 908 *result = tmp; 909 return p_on? 2:1; 910 } 911 912 913 /* 914 * csh-style history expansion 915 */ 916 int 917 history_expand(char *str, char **output) 918 { 919 int ret = 0; 920 size_t idx, i, size; 921 char *tmp, *result; 922 923 if (h == NULL || e == NULL) 924 rl_initialize(); 925 926 if (history_expansion_char == 0) { 927 *output = strdup(str); 928 return 0; 929 } 930 931 *output = NULL; 932 if (str[0] == history_subst_char) { 933 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 934 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 935 if (*output == NULL) 936 return 0; 937 (*output)[0] = (*output)[1] = history_expansion_char; 938 (*output)[2] = ':'; 939 (*output)[3] = 's'; 940 (void)strcpy((*output) + 4, str); 941 str = *output; 942 } else { 943 *output = strdup(str); 944 if (*output == NULL) 945 return 0; 946 } 947 948 #define ADD_STRING(what, len, fr) \ 949 { \ 950 if (idx + len + 1 > size) { \ 951 char *nresult = el_realloc(result, \ 952 (size += len + 1) * sizeof(*nresult)); \ 953 if (nresult == NULL) { \ 954 el_free(*output); \ 955 if (/*CONSTCOND*/fr) \ 956 el_free(tmp); \ 957 return 0; \ 958 } \ 959 result = nresult; \ 960 } \ 961 (void)strlcpy(&result[idx], what, len + 1); \ 962 idx += len; \ 963 } 964 965 result = NULL; 966 size = idx = 0; 967 tmp = NULL; 968 for (i = 0; str[i];) { 969 int qchar, loop_again; 970 size_t len, start, j; 971 972 qchar = 0; 973 loop_again = 1; 974 start = j = i; 975 loop: 976 for (; str[j]; j++) { 977 if (str[j] == '\\' && 978 str[j + 1] == history_expansion_char) { 979 len = strlen(&str[j + 1]) + 1; 980 memmove(&str[j], &str[j + 1], len); 981 continue; 982 } 983 if (!loop_again) { 984 if (isspace((unsigned char) str[j]) 985 || str[j] == qchar) 986 break; 987 } 988 if (str[j] == history_expansion_char 989 && !strchr(history_no_expand_chars, str[j + 1]) 990 && (!history_inhibit_expansion_function || 991 (*history_inhibit_expansion_function)(str, 992 (int)j) == 0)) 993 break; 994 } 995 996 if (str[j] && loop_again) { 997 i = j; 998 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 999 j++; 1000 if (str[j] == history_expansion_char) 1001 j++; 1002 loop_again = 0; 1003 goto loop; 1004 } 1005 len = i - start; 1006 ADD_STRING(&str[start], len, 0); 1007 1008 if (str[i] == '\0' || str[i] != history_expansion_char) { 1009 len = j - i; 1010 ADD_STRING(&str[i], len, 0); 1011 if (start == 0) 1012 ret = 0; 1013 else 1014 ret = 1; 1015 break; 1016 } 1017 ret = _history_expand_command (str, i, (j - i), &tmp); 1018 if (ret > 0 && tmp) { 1019 len = strlen(tmp); 1020 ADD_STRING(tmp, len, 1); 1021 } 1022 if (tmp) { 1023 el_free(tmp); 1024 tmp = NULL; 1025 } 1026 i = j; 1027 } 1028 1029 /* ret is 2 for "print only" option */ 1030 if (ret == 2) { 1031 add_history(result); 1032 #ifdef GDB_411_HACK 1033 /* gdb 4.11 has been shipped with readline, where */ 1034 /* history_expand() returned -1 when the line */ 1035 /* should not be executed; in readline 2.1+ */ 1036 /* it should return 2 in such a case */ 1037 ret = -1; 1038 #endif 1039 } 1040 el_free(*output); 1041 *output = result; 1042 1043 return ret; 1044 } 1045 1046 /* 1047 * Return a string consisting of arguments of "str" from "start" to "end". 1048 */ 1049 char * 1050 history_arg_extract(int start, int end, const char *str) 1051 { 1052 size_t i, len, max; 1053 char **arr, *result = NULL; 1054 1055 arr = history_tokenize(str); 1056 if (!arr) 1057 return NULL; 1058 if (arr && *arr == NULL) 1059 goto out; 1060 1061 for (max = 0; arr[max]; max++) 1062 continue; 1063 max--; 1064 1065 if (start == '$') 1066 start = (int)max; 1067 if (end == '$') 1068 end = (int)max; 1069 if (end < 0) 1070 end = (int)max + end + 1; 1071 if (start < 0) 1072 start = end; 1073 1074 if (start < 0 || end < 0 || (size_t)start > max || 1075 (size_t)end > max || start > end) 1076 goto out; 1077 1078 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1079 len += strlen(arr[i]) + 1; 1080 len++; 1081 result = el_calloc(len, sizeof(*result)); 1082 if (result == NULL) 1083 goto out; 1084 1085 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1086 (void)strcpy(result + len, arr[i]); 1087 len += strlen(arr[i]); 1088 if (i < (size_t)end) 1089 result[len++] = ' '; 1090 } 1091 result[len] = '\0'; 1092 1093 out: 1094 for (i = 0; arr[i]; i++) 1095 el_free(arr[i]); 1096 el_free(arr); 1097 1098 return result; 1099 } 1100 1101 /* 1102 * Parse the string into individual tokens, 1103 * similar to how shell would do it. 1104 */ 1105 char ** 1106 history_tokenize(const char *str) 1107 { 1108 int size = 1, idx = 0, i, start; 1109 size_t len; 1110 char **result = NULL, *temp, delim = '\0'; 1111 1112 for (i = 0; str[i];) { 1113 while (isspace((unsigned char) str[i])) 1114 i++; 1115 start = i; 1116 for (; str[i];) { 1117 if (str[i] == '\\') { 1118 if (str[i+1] != '\0') 1119 i++; 1120 } else if (str[i] == delim) 1121 delim = '\0'; 1122 else if (!delim && 1123 (isspace((unsigned char) str[i]) || 1124 strchr("()<>;&|$", str[i]))) 1125 break; 1126 else if (!delim && strchr("'`\"", str[i])) 1127 delim = str[i]; 1128 if (str[i]) 1129 i++; 1130 } 1131 1132 if (idx + 2 >= size) { 1133 char **nresult; 1134 size <<= 1; 1135 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1136 if (nresult == NULL) { 1137 el_free(result); 1138 return NULL; 1139 } 1140 result = nresult; 1141 } 1142 len = (size_t)i - (size_t)start; 1143 temp = el_calloc(len + 1, sizeof(*temp)); 1144 if (temp == NULL) { 1145 for (i = 0; i < idx; i++) 1146 el_free(result[i]); 1147 el_free(result); 1148 return NULL; 1149 } 1150 (void)strlcpy(temp, &str[start], len + 1); 1151 result[idx++] = temp; 1152 result[idx] = NULL; 1153 if (str[i]) 1154 i++; 1155 } 1156 return result; 1157 } 1158 1159 1160 /* 1161 * limit size of history record to ``max'' events 1162 */ 1163 void 1164 stifle_history(int max) 1165 { 1166 HistEvent ev; 1167 HIST_ENTRY *he; 1168 1169 if (h == NULL || e == NULL) 1170 rl_initialize(); 1171 1172 if (history(h, &ev, H_SETSIZE, max) == 0) { 1173 max_input_history = max; 1174 if (history_length > max) 1175 history_base = history_length - max; 1176 while (history_length > max) { 1177 he = remove_history(0); 1178 el_free(he->data); 1179 el_free((void *)(unsigned long)he->line); 1180 el_free(he); 1181 } 1182 } 1183 } 1184 1185 1186 /* 1187 * "unlimit" size of history - set the limit to maximum allowed int value 1188 */ 1189 int 1190 unstifle_history(void) 1191 { 1192 HistEvent ev; 1193 int omax; 1194 1195 history(h, &ev, H_SETSIZE, INT_MAX); 1196 omax = max_input_history; 1197 max_input_history = INT_MAX; 1198 return omax; /* some value _must_ be returned */ 1199 } 1200 1201 1202 int 1203 history_is_stifled(void) 1204 { 1205 1206 /* cannot return true answer */ 1207 return max_input_history != INT_MAX; 1208 } 1209 1210 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1211 1212 int 1213 history_truncate_file (const char *filename, int nlines) 1214 { 1215 int ret = 0; 1216 FILE *fp, *tp; 1217 char template[sizeof(_history_tmp_template)]; 1218 char buf[4096]; 1219 int fd; 1220 char *cp; 1221 off_t off; 1222 int count = 0; 1223 ssize_t left = 0; 1224 1225 if (filename == NULL && (filename = _default_history_file()) == NULL) 1226 return errno; 1227 if ((fp = fopen(filename, "r+")) == NULL) 1228 return errno; 1229 strcpy(template, _history_tmp_template); 1230 if ((fd = mkstemp(template)) == -1) { 1231 ret = errno; 1232 goto out1; 1233 } 1234 1235 if ((tp = fdopen(fd, "r+")) == NULL) { 1236 close(fd); 1237 ret = errno; 1238 goto out2; 1239 } 1240 1241 for(;;) { 1242 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1243 if (ferror(fp)) { 1244 ret = errno; 1245 break; 1246 } 1247 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1248 (off_t)-1) { 1249 ret = errno; 1250 break; 1251 } 1252 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1253 if (ferror(fp)) { 1254 ret = errno; 1255 break; 1256 } 1257 if (left == 0) { 1258 count--; 1259 left = sizeof(buf); 1260 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1261 != 1) { 1262 ret = errno; 1263 break; 1264 } 1265 fflush(tp); 1266 break; 1267 } 1268 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1269 ret = errno; 1270 break; 1271 } 1272 count++; 1273 } 1274 if (ret) 1275 goto out3; 1276 cp = buf + left - 1; 1277 if(*cp != '\n') 1278 cp++; 1279 for(;;) { 1280 while (--cp >= buf) { 1281 if (*cp == '\n') { 1282 if (--nlines == 0) { 1283 if (++cp >= buf + sizeof(buf)) { 1284 count++; 1285 cp = buf; 1286 } 1287 break; 1288 } 1289 } 1290 } 1291 if (nlines <= 0 || count == 0) 1292 break; 1293 count--; 1294 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1295 ret = errno; 1296 break; 1297 } 1298 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1299 if (ferror(tp)) { 1300 ret = errno; 1301 break; 1302 } 1303 ret = EAGAIN; 1304 break; 1305 } 1306 cp = buf + sizeof(buf); 1307 } 1308 1309 if (ret || nlines > 0) 1310 goto out3; 1311 1312 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1313 ret = errno; 1314 goto out3; 1315 } 1316 1317 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1318 (off_t)-1) { 1319 ret = errno; 1320 goto out3; 1321 } 1322 1323 for(;;) { 1324 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1325 if (ferror(fp)) 1326 ret = errno; 1327 break; 1328 } 1329 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1330 ret = errno; 1331 break; 1332 } 1333 } 1334 fflush(fp); 1335 if((off = ftello(fp)) > 0) 1336 (void)ftruncate(fileno(fp), off); 1337 out3: 1338 fclose(tp); 1339 out2: 1340 unlink(template); 1341 out1: 1342 fclose(fp); 1343 1344 return ret; 1345 } 1346 1347 1348 /* 1349 * read history from a file given 1350 */ 1351 int 1352 read_history(const char *filename) 1353 { 1354 HistEvent ev; 1355 1356 if (h == NULL || e == NULL) 1357 rl_initialize(); 1358 if (filename == NULL && (filename = _default_history_file()) == NULL) 1359 return errno; 1360 errno = 0; 1361 if (history(h, &ev, H_LOAD, filename) == -1) 1362 return errno ? errno : EINVAL; 1363 if (history(h, &ev, H_GETSIZE) == 0) 1364 history_length = ev.num; 1365 if (history_length < 0) 1366 return EINVAL; 1367 return 0; 1368 } 1369 1370 1371 /* 1372 * write history to a file given 1373 */ 1374 int 1375 write_history(const char *filename) 1376 { 1377 HistEvent ev; 1378 1379 if (h == NULL || e == NULL) 1380 rl_initialize(); 1381 if (filename == NULL && (filename = _default_history_file()) == NULL) 1382 return errno; 1383 return history(h, &ev, H_SAVE, filename) == -1 ? 1384 (errno ? errno : EINVAL) : 0; 1385 } 1386 1387 int 1388 append_history(int n, const char *filename) 1389 { 1390 HistEvent ev; 1391 FILE *fp; 1392 1393 if (h == NULL || e == NULL) 1394 rl_initialize(); 1395 if (filename == NULL && (filename = _default_history_file()) == NULL) 1396 return errno; 1397 1398 if ((fp = fopen(filename, "a")) == NULL) 1399 return errno; 1400 1401 if (history(h, &ev, H_NSAVE_FP, (size_t)n, fp) == -1) { 1402 int serrno = errno ? errno : EINVAL; 1403 fclose(fp); 1404 return serrno; 1405 } 1406 fclose(fp); 1407 return 0; 1408 } 1409 1410 /* 1411 * returns history ``num''th event 1412 * 1413 * returned pointer points to static variable 1414 */ 1415 HIST_ENTRY * 1416 history_get(int num) 1417 { 1418 static HIST_ENTRY she; 1419 HistEvent ev; 1420 int curr_num; 1421 1422 if (h == NULL || e == NULL) 1423 rl_initialize(); 1424 1425 if (num < history_base) 1426 return NULL; 1427 1428 /* save current position */ 1429 if (history(h, &ev, H_CURR) != 0) 1430 return NULL; 1431 curr_num = ev.num; 1432 1433 /* 1434 * use H_DELDATA to set to nth history (without delete) by passing 1435 * (void **)-1 -- as in history_set_pos 1436 */ 1437 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1438 goto out; 1439 1440 /* get current entry */ 1441 if (history(h, &ev, H_CURR) != 0) 1442 goto out; 1443 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1444 goto out; 1445 she.line = ev.str; 1446 1447 /* restore pointer to where it was */ 1448 (void)history(h, &ev, H_SET, curr_num); 1449 1450 return &she; 1451 1452 out: 1453 /* restore pointer to where it was */ 1454 (void)history(h, &ev, H_SET, curr_num); 1455 return NULL; 1456 } 1457 1458 1459 /* 1460 * add the line to history table 1461 */ 1462 int 1463 add_history(const char *line) 1464 { 1465 HistEvent ev; 1466 1467 if (h == NULL || e == NULL) 1468 rl_initialize(); 1469 1470 if (history(h, &ev, H_ENTER, line) == -1) 1471 return 0; 1472 1473 (void)history(h, &ev, H_GETSIZE); 1474 if (ev.num == history_length) 1475 history_base++; 1476 else { 1477 history_offset++; 1478 history_length = ev.num; 1479 } 1480 return 0; 1481 } 1482 1483 1484 /* 1485 * remove the specified entry from the history list and return it. 1486 */ 1487 HIST_ENTRY * 1488 remove_history(int num) 1489 { 1490 HIST_ENTRY *he; 1491 HistEvent ev; 1492 1493 if (h == NULL || e == NULL) 1494 rl_initialize(); 1495 1496 if ((he = el_malloc(sizeof(*he))) == NULL) 1497 return NULL; 1498 1499 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1500 el_free(he); 1501 return NULL; 1502 } 1503 1504 he->line = ev.str; 1505 if (history(h, &ev, H_GETSIZE) == 0) 1506 history_length = ev.num; 1507 1508 return he; 1509 } 1510 1511 1512 /* 1513 * replace the line and data of the num-th entry 1514 */ 1515 HIST_ENTRY * 1516 replace_history_entry(int num, const char *line, histdata_t data) 1517 { 1518 HIST_ENTRY *he; 1519 HistEvent ev; 1520 int curr_num; 1521 1522 if (h == NULL || e == NULL) 1523 rl_initialize(); 1524 1525 /* save current position */ 1526 if (history(h, &ev, H_CURR) != 0) 1527 return NULL; 1528 curr_num = ev.num; 1529 1530 /* start from the oldest */ 1531 if (history(h, &ev, H_LAST) != 0) 1532 return NULL; /* error */ 1533 1534 if ((he = el_malloc(sizeof(*he))) == NULL) 1535 return NULL; 1536 1537 /* look forwards for event matching specified offset */ 1538 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1539 goto out; 1540 1541 he->line = strdup(ev.str); 1542 if (he->line == NULL) 1543 goto out; 1544 1545 if (history(h, &ev, H_REPLACE, line, data)) 1546 goto out; 1547 1548 /* restore pointer to where it was */ 1549 if (history(h, &ev, H_SET, curr_num)) 1550 goto out; 1551 1552 return he; 1553 out: 1554 el_free(he); 1555 return NULL; 1556 } 1557 1558 /* 1559 * clear the history list - delete all entries 1560 */ 1561 void 1562 clear_history(void) 1563 { 1564 HistEvent ev; 1565 1566 if (h == NULL || e == NULL) 1567 rl_initialize(); 1568 1569 (void)history(h, &ev, H_CLEAR); 1570 history_offset = history_length = 0; 1571 } 1572 1573 1574 /* 1575 * returns offset of the current history event 1576 */ 1577 int 1578 where_history(void) 1579 { 1580 return history_offset; 1581 } 1582 1583 static HIST_ENTRY **_history_listp; 1584 static HIST_ENTRY *_history_list; 1585 1586 HIST_ENTRY ** 1587 history_list(void) 1588 { 1589 HistEvent ev; 1590 HIST_ENTRY **nlp, *nl; 1591 int i; 1592 1593 if (history(h, &ev, H_LAST) != 0) 1594 return NULL; 1595 1596 if ((nlp = el_realloc(_history_listp, 1597 ((size_t)history_length + 1) * sizeof(*nlp))) == NULL) 1598 return NULL; 1599 _history_listp = nlp; 1600 1601 if ((nl = el_realloc(_history_list, 1602 (size_t)history_length * sizeof(*nl))) == NULL) 1603 return NULL; 1604 _history_list = nl; 1605 1606 i = 0; 1607 do { 1608 _history_listp[i] = &_history_list[i]; 1609 _history_list[i].line = ev.str; 1610 _history_list[i].data = NULL; 1611 if (i++ == history_length) 1612 abort(); 1613 } while (history(h, &ev, H_PREV) == 0); 1614 _history_listp[i] = NULL; 1615 return _history_listp; 1616 } 1617 1618 /* 1619 * returns current history event or NULL if there is no such event 1620 */ 1621 HIST_ENTRY * 1622 current_history(void) 1623 { 1624 HistEvent ev; 1625 1626 if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0) 1627 return NULL; 1628 1629 rl_he.line = ev.str; 1630 rl_he.data = NULL; 1631 return &rl_he; 1632 } 1633 1634 1635 /* 1636 * returns total number of bytes history events' data are using 1637 */ 1638 int 1639 history_total_bytes(void) 1640 { 1641 HistEvent ev; 1642 int curr_num; 1643 size_t size; 1644 1645 if (history(h, &ev, H_CURR) != 0) 1646 return -1; 1647 curr_num = ev.num; 1648 1649 (void)history(h, &ev, H_FIRST); 1650 size = 0; 1651 do 1652 size += strlen(ev.str) * sizeof(*ev.str); 1653 while (history(h, &ev, H_NEXT) == 0); 1654 1655 /* get to the same position as before */ 1656 history(h, &ev, H_PREV_EVENT, curr_num); 1657 1658 return (int)size; 1659 } 1660 1661 1662 /* 1663 * sets the position in the history list to ``pos'' 1664 */ 1665 int 1666 history_set_pos(int pos) 1667 { 1668 if (pos >= history_length || pos < 0) 1669 return 0; 1670 1671 history_offset = pos; 1672 return 1; 1673 } 1674 1675 1676 /* 1677 * returns previous event in history and shifts pointer accordingly 1678 * Note that readline and editline define directions in opposite ways. 1679 */ 1680 HIST_ENTRY * 1681 previous_history(void) 1682 { 1683 HistEvent ev; 1684 1685 if (history_offset == 0) 1686 return NULL; 1687 1688 if (history(h, &ev, H_LAST) != 0) 1689 return NULL; 1690 1691 history_offset--; 1692 return current_history(); 1693 } 1694 1695 1696 /* 1697 * returns next event in history and shifts pointer accordingly 1698 */ 1699 HIST_ENTRY * 1700 next_history(void) 1701 { 1702 HistEvent ev; 1703 1704 if (history_offset >= history_length) 1705 return NULL; 1706 1707 if (history(h, &ev, H_LAST) != 0) 1708 return NULL; 1709 1710 history_offset++; 1711 return current_history(); 1712 } 1713 1714 1715 /* 1716 * searches for first history event containing the str 1717 */ 1718 int 1719 history_search(const char *str, int direction) 1720 { 1721 HistEvent ev; 1722 const char *strp; 1723 int curr_num; 1724 1725 if (history(h, &ev, H_CURR) != 0) 1726 return -1; 1727 curr_num = ev.num; 1728 1729 for (;;) { 1730 if ((strp = strstr(ev.str, str)) != NULL) 1731 return (int)(strp - ev.str); 1732 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1733 break; 1734 } 1735 (void)history(h, &ev, H_SET, curr_num); 1736 return -1; 1737 } 1738 1739 1740 /* 1741 * searches for first history event beginning with str 1742 */ 1743 int 1744 history_search_prefix(const char *str, int direction) 1745 { 1746 HistEvent ev; 1747 1748 return (history(h, &ev, direction < 0 ? 1749 H_PREV_STR : H_NEXT_STR, str)); 1750 } 1751 1752 1753 /* 1754 * search for event in history containing str, starting at offset 1755 * abs(pos); continue backward, if pos<0, forward otherwise 1756 */ 1757 /* ARGSUSED */ 1758 int 1759 history_search_pos(const char *str, 1760 int direction __attribute__((__unused__)), int pos) 1761 { 1762 HistEvent ev; 1763 int curr_num, off; 1764 1765 off = (pos > 0) ? pos : -pos; 1766 pos = (pos > 0) ? 1 : -1; 1767 1768 if (history(h, &ev, H_CURR) != 0) 1769 return -1; 1770 curr_num = ev.num; 1771 1772 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1773 return -1; 1774 1775 for (;;) { 1776 if (strstr(ev.str, str)) 1777 return off; 1778 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1779 break; 1780 } 1781 1782 /* set "current" pointer back to previous state */ 1783 (void)history(h, &ev, 1784 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1785 1786 return -1; 1787 } 1788 1789 1790 /********************************/ 1791 /* completion functions */ 1792 1793 char * 1794 tilde_expand(char *name) 1795 { 1796 return fn_tilde_expand(name); 1797 } 1798 1799 char * 1800 filename_completion_function(const char *name, int state) 1801 { 1802 return fn_filename_completion_function(name, state); 1803 } 1804 1805 /* 1806 * a completion generator for usernames; returns _first_ username 1807 * which starts with supplied text 1808 * text contains a partial username preceded by random character 1809 * (usually '~'); state resets search from start (??? should we do that anyway) 1810 * it's the caller's responsibility to free the returned value 1811 */ 1812 char * 1813 username_completion_function(const char *text, int state) 1814 { 1815 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1816 struct passwd pwres; 1817 char pwbuf[1024]; 1818 #endif 1819 struct passwd *pass = NULL; 1820 1821 if (text[0] == '\0') 1822 return NULL; 1823 1824 if (*text == '~') 1825 text++; 1826 1827 if (state == 0) 1828 setpwent(); 1829 1830 while ( 1831 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT) 1832 getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL 1833 #else 1834 (pass = getpwent()) != NULL 1835 #endif 1836 && text[0] == pass->pw_name[0] 1837 && strcmp(text, pass->pw_name) == 0) 1838 continue; 1839 1840 if (pass == NULL) { 1841 endpwent(); 1842 return NULL; 1843 } 1844 return strdup(pass->pw_name); 1845 } 1846 1847 1848 /* 1849 * el-compatible wrapper to send TSTP on ^Z 1850 */ 1851 /* ARGSUSED */ 1852 static unsigned char 1853 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1854 { 1855 (void)kill(0, SIGTSTP); 1856 return CC_NORM; 1857 } 1858 1859 static const char * 1860 /*ARGSUSED*/ 1861 _rl_completion_append_character_function(const char *dummy 1862 __attribute__((__unused__))) 1863 { 1864 static char buf[2]; 1865 buf[0] = (char)rl_completion_append_character; 1866 buf[1] = '\0'; 1867 return buf; 1868 } 1869 1870 1871 /* 1872 * Display list of strings in columnar format on readline's output stream. 1873 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1874 * 'max' is maximum length of string in 'matches'. 1875 */ 1876 void 1877 rl_display_match_list(char **matches, int len, int max) 1878 { 1879 1880 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1881 _rl_completion_append_character_function); 1882 } 1883 1884 /* 1885 * complete word at current point 1886 */ 1887 /* ARGSUSED */ 1888 int 1889 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1890 { 1891 static ct_buffer_t wbreak_conv, sprefix_conv; 1892 const char *breakchars; 1893 1894 if (h == NULL || e == NULL) 1895 rl_initialize(); 1896 1897 if (rl_inhibit_completion) { 1898 char arr[2]; 1899 arr[0] = (char)invoking_key; 1900 arr[1] = '\0'; 1901 el_insertstr(e, arr); 1902 return CC_REFRESH; 1903 } 1904 1905 if (rl_completion_word_break_hook != NULL) 1906 breakchars = (*rl_completion_word_break_hook)(); 1907 else 1908 breakchars = rl_basic_word_break_characters; 1909 1910 _rl_update_pos(); 1911 1912 /* Just look at how many global variables modify this operation! */ 1913 return fn_complete(e, 1914 (rl_compentry_func_t *)rl_completion_entry_function, 1915 rl_attempted_completion_function, 1916 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1917 ct_decode_string(breakchars, &sprefix_conv), 1918 _rl_completion_append_character_function, 1919 (size_t)rl_completion_query_items, 1920 &rl_completion_type, &rl_attempted_completion_over, 1921 &rl_point, &rl_end); 1922 1923 1924 } 1925 1926 1927 /* ARGSUSED */ 1928 static unsigned char 1929 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1930 { 1931 return (unsigned char)rl_complete(0, ch); 1932 } 1933 1934 /* 1935 * misc other functions 1936 */ 1937 1938 /* 1939 * bind key c to readline-type function func 1940 */ 1941 int 1942 rl_bind_key(int c, rl_command_func_t *func) 1943 { 1944 int retval = -1; 1945 1946 if (h == NULL || e == NULL) 1947 rl_initialize(); 1948 1949 if (func == rl_insert) { 1950 /* XXX notice there is no range checking of ``c'' */ 1951 e->el_map.key[c] = ED_INSERT; 1952 retval = 0; 1953 } 1954 return retval; 1955 } 1956 1957 1958 /* 1959 * read one key from input - handles chars pushed back 1960 * to input stream also 1961 */ 1962 int 1963 rl_read_key(void) 1964 { 1965 char fooarr[2 * sizeof(int)]; 1966 1967 if (e == NULL || h == NULL) 1968 rl_initialize(); 1969 1970 return el_getc(e, fooarr); 1971 } 1972 1973 1974 /* 1975 * reset the terminal 1976 */ 1977 /* ARGSUSED */ 1978 int 1979 rl_reset_terminal(const char *p __attribute__((__unused__))) 1980 { 1981 1982 if (h == NULL || e == NULL) 1983 rl_initialize(); 1984 el_reset(e); 1985 return 0; 1986 } 1987 1988 1989 /* 1990 * insert character ``c'' back into input stream, ``count'' times 1991 */ 1992 int 1993 rl_insert(int count, int c) 1994 { 1995 char arr[2]; 1996 1997 if (h == NULL || e == NULL) 1998 rl_initialize(); 1999 2000 /* XXX - int -> char conversion can lose on multichars */ 2001 arr[0] = (char)c; 2002 arr[1] = '\0'; 2003 2004 for (; count > 0; count--) 2005 el_push(e, arr); 2006 2007 return 0; 2008 } 2009 2010 int 2011 rl_insert_text(const char *text) 2012 { 2013 if (!text || *text == 0) 2014 return 0; 2015 2016 if (h == NULL || e == NULL) 2017 rl_initialize(); 2018 2019 if (el_insertstr(e, text) < 0) 2020 return 0; 2021 return (int)strlen(text); 2022 } 2023 2024 /*ARGSUSED*/ 2025 int 2026 rl_newline(int count __attribute__((__unused__)), 2027 int c __attribute__((__unused__))) 2028 { 2029 /* 2030 * Readline-4.0 appears to ignore the args. 2031 */ 2032 return rl_insert(1, '\n'); 2033 } 2034 2035 /*ARGSUSED*/ 2036 static unsigned char 2037 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2038 { 2039 if (map[c] == NULL) 2040 return CC_ERROR; 2041 2042 _rl_update_pos(); 2043 2044 (*map[c])(1, c); 2045 2046 /* If rl_done was set by the above call, deal with it here */ 2047 if (rl_done) 2048 return CC_EOF; 2049 2050 return CC_NORM; 2051 } 2052 2053 int 2054 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2055 { 2056 char dest[8]; 2057 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2058 return -1; 2059 map[(unsigned char)c] = fun; 2060 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2061 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2062 el_set(e, EL_BIND, dest, name, NULL); 2063 return 0; 2064 } 2065 2066 void 2067 rl_callback_read_char(void) 2068 { 2069 int count = 0, done = 0; 2070 const char *buf = el_gets(e, &count); 2071 char *wbuf; 2072 2073 if (buf == NULL || count-- <= 0) 2074 return; 2075 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2076 done = 1; 2077 if (buf[count] == '\n' || buf[count] == '\r') 2078 done = 2; 2079 2080 if (done && rl_linefunc != NULL) { 2081 el_set(e, EL_UNBUFFERED, 0); 2082 if (done == 2) { 2083 if ((wbuf = strdup(buf)) != NULL) 2084 wbuf[count] = '\0'; 2085 } else 2086 wbuf = NULL; 2087 (*(void (*)(const char *))rl_linefunc)(wbuf); 2088 el_set(e, EL_UNBUFFERED, 1); 2089 } 2090 } 2091 2092 void 2093 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2094 { 2095 if (e == NULL) { 2096 rl_initialize(); 2097 } 2098 (void)rl_set_prompt(prompt); 2099 rl_linefunc = linefunc; 2100 el_set(e, EL_UNBUFFERED, 1); 2101 } 2102 2103 void 2104 rl_callback_handler_remove(void) 2105 { 2106 rl_linefunc = NULL; 2107 el_end(e); 2108 e = NULL; 2109 } 2110 2111 void 2112 rl_redisplay(void) 2113 { 2114 char a[2]; 2115 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2116 a[1] = '\0'; 2117 el_push(e, a); 2118 } 2119 2120 int 2121 rl_get_previous_history(int count, int key) 2122 { 2123 char a[2]; 2124 a[0] = (char)key; 2125 a[1] = '\0'; 2126 while (count--) 2127 el_push(e, a); 2128 return 0; 2129 } 2130 2131 void 2132 /*ARGSUSED*/ 2133 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2134 { 2135 el_set(e, EL_PREP_TERM, 1); 2136 } 2137 2138 void 2139 rl_deprep_terminal(void) 2140 { 2141 el_set(e, EL_PREP_TERM, 0); 2142 } 2143 2144 int 2145 rl_read_init_file(const char *s) 2146 { 2147 return el_source(e, s); 2148 } 2149 2150 int 2151 rl_parse_and_bind(const char *line) 2152 { 2153 const char **argv; 2154 int argc; 2155 Tokenizer *tok; 2156 2157 tok = tok_init(NULL); 2158 tok_str(tok, line, &argc, &argv); 2159 argc = el_parse(e, argc, argv); 2160 tok_end(tok); 2161 return argc ? 1 : 0; 2162 } 2163 2164 int 2165 rl_variable_bind(const char *var, const char *value) 2166 { 2167 /* 2168 * The proper return value is undocument, but this is what the 2169 * readline source seems to do. 2170 */ 2171 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2172 } 2173 2174 int 2175 rl_stuff_char(int c) 2176 { 2177 char buf[2]; 2178 2179 buf[0] = (char)c; 2180 buf[1] = '\0'; 2181 el_insertstr(e, buf); 2182 return 1; 2183 } 2184 2185 static int 2186 _rl_event_read_char(EditLine *el, wchar_t *wc) 2187 { 2188 char ch; 2189 int n; 2190 ssize_t num_read = 0; 2191 2192 ch = '\0'; 2193 *wc = L'\0'; 2194 while (rl_event_hook) { 2195 2196 (*rl_event_hook)(); 2197 2198 #if defined(FIONREAD) 2199 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2200 return -1; 2201 if (n) 2202 num_read = read(el->el_infd, &ch, (size_t)1); 2203 else 2204 num_read = 0; 2205 #elif defined(F_SETFL) && defined(O_NDELAY) 2206 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2207 return -1; 2208 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2209 return -1; 2210 num_read = read(el->el_infd, &ch, 1); 2211 if (fcntl(el->el_infd, F_SETFL, n)) 2212 return -1; 2213 #else 2214 /* not non-blocking, but what you gonna do? */ 2215 num_read = read(el->el_infd, &ch, 1); 2216 return -1; 2217 #endif 2218 2219 if (num_read < 0 && errno == EAGAIN) 2220 continue; 2221 if (num_read == 0) 2222 continue; 2223 break; 2224 } 2225 if (!rl_event_hook) 2226 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2227 *wc = (wchar_t)ch; 2228 return (int)num_read; 2229 } 2230 2231 static void 2232 _rl_update_pos(void) 2233 { 2234 const LineInfo *li = el_line(e); 2235 2236 rl_point = (int)(li->cursor - li->buffer); 2237 rl_end = (int)(li->lastchar - li->buffer); 2238 rl_line_buffer[rl_end] = '\0'; 2239 } 2240 2241 void 2242 rl_get_screen_size(int *rows, int *cols) 2243 { 2244 if (rows) 2245 el_get(e, EL_GETTC, "li", rows); 2246 if (cols) 2247 el_get(e, EL_GETTC, "co", cols); 2248 } 2249 2250 void 2251 rl_set_screen_size(int rows, int cols) 2252 { 2253 char buf[64]; 2254 (void)snprintf(buf, sizeof(buf), "%d", rows); 2255 el_set(e, EL_SETTC, "li", buf, NULL); 2256 (void)snprintf(buf, sizeof(buf), "%d", cols); 2257 el_set(e, EL_SETTC, "co", buf, NULL); 2258 } 2259 2260 char ** 2261 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2262 { 2263 size_t len, max, i, j, min; 2264 char **list, *match, *a, *b; 2265 2266 len = 1; 2267 max = 10; 2268 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2269 return NULL; 2270 2271 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2272 list[len++] = match; 2273 if (len == max) { 2274 char **nl; 2275 max += 10; 2276 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2277 goto out; 2278 list = nl; 2279 } 2280 } 2281 if (len == 1) 2282 goto out; 2283 list[len] = NULL; 2284 if (len == 2) { 2285 if ((list[0] = strdup(list[1])) == NULL) 2286 goto out; 2287 return list; 2288 } 2289 qsort(&list[1], len - 1, sizeof(*list), 2290 (int (*)(const void *, const void *)) strcmp); 2291 min = SIZE_MAX; 2292 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2293 b = list[i + 1]; 2294 for (j = 0; a[j] && a[j] == b[j]; j++) 2295 continue; 2296 if (min > j) 2297 min = j; 2298 } 2299 if (min == 0 && *str) { 2300 if ((list[0] = strdup(str)) == NULL) 2301 goto out; 2302 } else { 2303 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2304 goto out; 2305 (void)memcpy(list[0], list[1], min); 2306 list[0][min] = '\0'; 2307 } 2308 return list; 2309 2310 out: 2311 el_free(list); 2312 return NULL; 2313 } 2314 2315 char * 2316 rl_filename_completion_function (const char *text, int state) 2317 { 2318 return fn_filename_completion_function(text, state); 2319 } 2320 2321 void 2322 rl_forced_update_display(void) 2323 { 2324 el_set(e, EL_REFRESH); 2325 } 2326 2327 int 2328 _rl_abort_internal(void) 2329 { 2330 el_beep(e); 2331 longjmp(topbuf, 1); 2332 /*NOTREACHED*/ 2333 } 2334 2335 int 2336 _rl_qsort_string_compare(char **s1, char **s2) 2337 { 2338 return strcoll(*s1, *s2); 2339 } 2340 2341 HISTORY_STATE * 2342 history_get_history_state(void) 2343 { 2344 HISTORY_STATE *hs; 2345 2346 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2347 return NULL; 2348 hs->length = history_length; 2349 return hs; 2350 } 2351 2352 int 2353 /*ARGSUSED*/ 2354 rl_kill_text(int from __attribute__((__unused__)), 2355 int to __attribute__((__unused__))) 2356 { 2357 return 0; 2358 } 2359 2360 Keymap 2361 rl_make_bare_keymap(void) 2362 { 2363 return NULL; 2364 } 2365 2366 Keymap 2367 rl_get_keymap(void) 2368 { 2369 return NULL; 2370 } 2371 2372 void 2373 /*ARGSUSED*/ 2374 rl_set_keymap(Keymap k __attribute__((__unused__))) 2375 { 2376 } 2377 2378 int 2379 /*ARGSUSED*/ 2380 rl_generic_bind(int type __attribute__((__unused__)), 2381 const char * keyseq __attribute__((__unused__)), 2382 const char * data __attribute__((__unused__)), 2383 Keymap k __attribute__((__unused__))) 2384 { 2385 return 0; 2386 } 2387 2388 int 2389 /*ARGSUSED*/ 2390 rl_bind_key_in_map(int key __attribute__((__unused__)), 2391 rl_command_func_t *fun __attribute__((__unused__)), 2392 Keymap k __attribute__((__unused__))) 2393 { 2394 return 0; 2395 } 2396 2397 /* unsupported, but needed by python */ 2398 void 2399 rl_cleanup_after_signal(void) 2400 { 2401 } 2402 2403 int 2404 rl_on_new_line(void) 2405 { 2406 return 0; 2407 } 2408 2409 void 2410 rl_free_line_state(void) 2411 { 2412 } 2413 2414 int 2415 /*ARGSUSED*/ 2416 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2417 { 2418 return 0; 2419 } 2420 2421 void 2422 rl_resize_terminal(void) 2423 { 2424 el_resize(e); 2425 } 2426 2427 void 2428 rl_reset_after_signal(void) 2429 { 2430 if (rl_prep_term_function) 2431 (*rl_prep_term_function)(); 2432 } 2433 2434 void 2435 rl_echo_signal_char(int sig) 2436 { 2437 int c = tty_get_signal_character(e, sig); 2438 if (c == -1) 2439 return; 2440 re_putc(e, c, 0); 2441 } 2442