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 $"); 35 #endif /* not lint && not SCCSID */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <dirent.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <setjmp.h> 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <vis.h> 52 53 #include "editline/readline.h" 54 #include "el.h" 55 #include "fcns.h" 56 #include "filecomplete.h" 57 58 #if !defined(SIZE_T_MAX) 59 # define SIZE_T_MAX (size_t)(-1) 60 #endif 61 62 void rl_prep_terminal(int); 63 void rl_deprep_terminal(void); 64 65 /* for rl_complete() */ 66 #define TAB '\r' 67 68 /* see comment at the #ifdef for sense of this */ 69 /* #define GDB_411_HACK */ 70 71 /* readline compatibility stuff - look at readline sources/documentation */ 72 /* to see what these variables mean */ 73 const char *rl_library_version = "EditLine wrapper"; 74 int rl_readline_version = RL_READLINE_VERSION; 75 static char empty[] = { '\0' }; 76 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 77 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 78 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 79 const char *rl_readline_name = empty; 80 FILE *rl_instream = NULL; 81 FILE *rl_outstream = NULL; 82 int rl_point = 0; 83 int rl_end = 0; 84 char *rl_line_buffer = NULL; 85 rl_vcpfunc_t *rl_linefunc = NULL; 86 int rl_done = 0; 87 rl_hook_func_t *rl_event_hook = NULL; 88 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 89 emacs_meta_keymap, 90 emacs_ctlx_keymap; 91 /* 92 * The following is not implemented; we always catch signals in the 93 * libedit fashion: set handlers on entry to el_gets() and clear them 94 * on the way out. This simplistic approach works for most cases; if 95 * it does not work for your application, please let us know. 96 */ 97 int rl_catch_signals = 1; 98 int rl_catch_sigwinch = 1; 99 100 int history_base = 1; /* probably never subject to change */ 101 int history_length = 0; 102 int history_offset = 0; 103 int max_input_history = 0; 104 char history_expansion_char = '!'; 105 char history_subst_char = '^'; 106 char *history_no_expand_chars = expand_chars; 107 Function *history_inhibit_expansion_function = NULL; 108 char *history_arg_extract(int start, int end, const char *str); 109 110 int rl_inhibit_completion = 0; 111 int rl_attempted_completion_over = 0; 112 const char *rl_basic_word_break_characters = break_chars; 113 char *rl_completer_word_break_characters = NULL; 114 const char *rl_completer_quote_characters = NULL; 115 rl_compentry_func_t *rl_completion_entry_function = NULL; 116 char *(*rl_completion_word_break_hook)(void) = NULL; 117 rl_completion_func_t *rl_attempted_completion_function = NULL; 118 Function *rl_pre_input_hook = NULL; 119 Function *rl_startup1_hook = NULL; 120 int (*rl_getc_function)(FILE *) = NULL; 121 char *rl_terminal_name = NULL; 122 int rl_already_prompted = 0; 123 int rl_filename_completion_desired = 0; 124 int rl_ignore_completion_duplicates = 0; 125 int readline_echoing_p = 1; 126 int _rl_print_completions_horizontally = 0; 127 VFunction *rl_redisplay_function = NULL; 128 Function *rl_startup_hook = NULL; 129 int rl_did_startup_hook = 0; 130 VFunction *rl_completion_display_matches_hook = NULL; 131 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 132 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 133 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 134 135 /* 136 * The current prompt string. 137 */ 138 char *rl_prompt = NULL; 139 /* 140 * This is set to character indicating type of completion being done by 141 * rl_complete_internal(); this is available for application completion 142 * functions. 143 */ 144 int rl_completion_type = 0; 145 146 /* 147 * If more than this number of items results from query for possible 148 * completions, we ask user if they are sure to really display the list. 149 */ 150 int rl_completion_query_items = 100; 151 152 /* 153 * List of characters which are word break characters, but should be left 154 * in the parsed text when it is passed to the completion function. 155 * Shell uses this to help determine what kind of completing to do. 156 */ 157 const char *rl_special_prefixes = NULL; 158 159 /* 160 * This is the character appended to the completed words if at the end of 161 * the line. Default is ' ' (a space). 162 */ 163 int rl_completion_append_character = ' '; 164 165 /* stuff below is used internally by libedit for readline emulation */ 166 167 static History *h = NULL; 168 static EditLine *e = NULL; 169 static rl_command_func_t *map[256]; 170 static jmp_buf topbuf; 171 172 /* internal functions */ 173 static unsigned char _el_rl_complete(EditLine *, int); 174 static unsigned char _el_rl_tstp(EditLine *, int); 175 static char *_get_prompt(EditLine *); 176 static int _getc_function(EditLine *, wchar_t *); 177 static int _history_expand_command(const char *, size_t, size_t, 178 char **); 179 static char *_rl_compat_sub(const char *, const char *, 180 const char *, int); 181 static int _rl_event_read_char(EditLine *, wchar_t *); 182 static void _rl_update_pos(void); 183 184 static HIST_ENTRY rl_he; 185 186 /* ARGSUSED */ 187 static char * 188 _get_prompt(EditLine *el __attribute__((__unused__))) 189 { 190 rl_already_prompted = 1; 191 return rl_prompt; 192 } 193 194 195 /* 196 * read one key from user defined input function 197 */ 198 static int 199 /*ARGSUSED*/ 200 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 201 { 202 int i; 203 204 i = (*rl_getc_function)(rl_instream); 205 if (i == -1) 206 return 0; 207 *c = (wchar_t)i; 208 return 1; 209 } 210 211 static void 212 _resize_fun(EditLine *el, void *a) 213 { 214 const LineInfo *li; 215 char **ap = a; 216 217 li = el_line(el); 218 /* a cheesy way to get rid of const cast. */ 219 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 220 } 221 222 static const char * 223 _default_history_file(void) 224 { 225 struct passwd *p; 226 static char *path; 227 size_t len; 228 229 if (path) 230 return path; 231 232 if ((p = getpwuid(getuid())) == NULL) 233 return NULL; 234 235 len = strlen(p->pw_dir) + sizeof("/.history"); 236 if ((path = malloc(len)) == NULL) 237 return NULL; 238 239 (void)snprintf(path, len, "%s/.history", p->pw_dir); 240 return path; 241 } 242 243 /* 244 * READLINE compatibility stuff 245 */ 246 247 /* 248 * Set the prompt 249 */ 250 int 251 rl_set_prompt(const char *prompt) 252 { 253 char *p; 254 255 if (!prompt) 256 prompt = ""; 257 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 258 return 0; 259 if (rl_prompt) 260 el_free(rl_prompt); 261 rl_prompt = strdup(prompt); 262 if (rl_prompt == NULL) 263 return -1; 264 265 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) { 266 /* Remove adjacent end/start markers to avoid double-escapes. */ 267 if (p[1] == RL_PROMPT_START_IGNORE) { 268 memmove(p, p + 2, 1 + strlen(p + 2)); 269 } else { 270 *p = RL_PROMPT_START_IGNORE; 271 } 272 } 273 274 return 0; 275 } 276 277 /* 278 * initialize rl compat stuff 279 */ 280 int 281 rl_initialize(void) 282 { 283 HistEvent ev; 284 int editmode = 1; 285 struct termios t; 286 287 if (e != NULL) 288 el_end(e); 289 if (h != NULL) 290 history_end(h); 291 292 if (!rl_instream) 293 rl_instream = stdin; 294 if (!rl_outstream) 295 rl_outstream = stdout; 296 297 /* 298 * See if we don't really want to run the editor 299 */ 300 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 301 editmode = 0; 302 303 e = el_init_internal(rl_readline_name, rl_instream, rl_outstream, 304 stderr, fileno(rl_instream), fileno(rl_outstream), fileno(stderr), 305 NO_RESET); 306 307 if (!editmode) 308 el_set(e, EL_EDITMODE, 0); 309 310 h = history_init(); 311 if (!e || !h) 312 return -1; 313 314 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 315 history_length = 0; 316 max_input_history = INT_MAX; 317 el_set(e, EL_HIST, history, h); 318 319 /* Setup resize function */ 320 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 321 322 /* setup getc function if valid */ 323 if (rl_getc_function) 324 el_set(e, EL_GETCFN, _getc_function); 325 326 /* for proper prompt printing in readline() */ 327 if (rl_set_prompt("") == -1) { 328 history_end(h); 329 el_end(e); 330 return -1; 331 } 332 el_set(e, EL_PROMPT_ESC, _get_prompt, RL_PROMPT_START_IGNORE); 333 el_set(e, EL_SIGNAL, rl_catch_signals); 334 335 /* set default mode to "emacs"-style and read setting afterwards */ 336 /* so this can be overridden */ 337 el_set(e, EL_EDITOR, "emacs"); 338 if (rl_terminal_name != NULL) 339 el_set(e, EL_TERMINAL, rl_terminal_name); 340 else 341 el_get(e, EL_TERMINAL, &rl_terminal_name); 342 343 /* 344 * Word completion - this has to go AFTER rebinding keys 345 * to emacs-style. 346 */ 347 el_set(e, EL_ADDFN, "rl_complete", 348 "ReadLine compatible completion function", 349 _el_rl_complete); 350 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 351 352 /* 353 * Send TSTP when ^Z is pressed. 354 */ 355 el_set(e, EL_ADDFN, "rl_tstp", 356 "ReadLine compatible suspend function", 357 _el_rl_tstp); 358 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 359 360 /* 361 * Set some readline compatible key-bindings. 362 */ 363 el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL); 364 365 /* 366 * Allow the use of Home/End keys. 367 */ 368 el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL); 369 el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL); 370 el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL); 371 el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL); 372 el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL); 373 el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL); 374 375 /* 376 * Allow the use of the Delete/Insert keys. 377 */ 378 el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL); 379 el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL); 380 381 /* 382 * Ctrl-left-arrow and Ctrl-right-arrow for word moving. 383 */ 384 el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL); 385 el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); 386 el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL); 387 el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL); 388 el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL); 389 el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); 390 391 /* read settings from configuration file */ 392 el_source(e, NULL); 393 394 /* 395 * Unfortunately, some applications really do use rl_point 396 * and rl_line_buffer directly. 397 */ 398 _resize_fun(e, &rl_line_buffer); 399 _rl_update_pos(); 400 401 tty_end(e, TCSADRAIN); 402 403 return 0; 404 } 405 406 407 /* 408 * read one line from input stream and return it, chomping 409 * trailing newline (if there is any) 410 */ 411 char * 412 readline(const char *p) 413 { 414 HistEvent ev; 415 const char * volatile prompt = p; 416 int count; 417 const char *ret; 418 char *buf; 419 static int used_event_hook; 420 421 if (e == NULL || h == NULL) 422 rl_initialize(); 423 if (rl_did_startup_hook == 0 && rl_startup_hook) { 424 rl_did_startup_hook = 1; 425 (*rl_startup_hook)(NULL, 0); 426 } 427 tty_init(e); 428 429 430 rl_done = 0; 431 432 (void)setjmp(topbuf); 433 buf = NULL; 434 435 /* update prompt accordingly to what has been passed */ 436 if (rl_set_prompt(prompt) == -1) 437 goto out; 438 439 if (rl_pre_input_hook) 440 (*rl_pre_input_hook)(NULL, 0); 441 442 if (rl_event_hook && !(e->el_flags & NO_TTY)) { 443 el_set(e, EL_GETCFN, _rl_event_read_char); 444 used_event_hook = 1; 445 } 446 447 if (!rl_event_hook && used_event_hook) { 448 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 449 used_event_hook = 0; 450 } 451 452 rl_already_prompted = 0; 453 454 /* get one line from input stream */ 455 ret = el_gets(e, &count); 456 457 if (ret && count > 0) { 458 int lastidx; 459 460 buf = strdup(ret); 461 if (buf == NULL) 462 goto out; 463 lastidx = count - 1; 464 if (buf[lastidx] == '\n') 465 buf[lastidx] = '\0'; 466 } else 467 buf = NULL; 468 469 history(h, &ev, H_GETSIZE); 470 history_length = ev.num; 471 472 out: 473 tty_end(e, TCSADRAIN); 474 return buf; 475 } 476 477 /* 478 * history functions 479 */ 480 481 /* 482 * is normally called before application starts to use 483 * history expansion functions 484 */ 485 void 486 using_history(void) 487 { 488 if (h == NULL || e == NULL) 489 rl_initialize(); 490 history_offset = history_length; 491 } 492 493 494 /* 495 * substitute ``what'' with ``with'', returning resulting string; if 496 * globally == 1, substitutes all occurrences of what, otherwise only the 497 * first one 498 */ 499 static char * 500 _rl_compat_sub(const char *str, const char *what, const char *with, 501 int globally) 502 { 503 const char *s; 504 char *r, *result; 505 size_t len, with_len, what_len; 506 507 len = strlen(str); 508 with_len = strlen(with); 509 what_len = strlen(what); 510 511 /* calculate length we need for result */ 512 s = str; 513 while (*s) { 514 if (*s == *what && !strncmp(s, what, what_len)) { 515 len += with_len - what_len; 516 if (!globally) 517 break; 518 s += what_len; 519 } else 520 s++; 521 } 522 r = result = el_calloc(len + 1, sizeof(*r)); 523 if (result == NULL) 524 return NULL; 525 s = str; 526 while (*s) { 527 if (*s == *what && !strncmp(s, what, what_len)) { 528 memcpy(r, with, with_len); 529 r += with_len; 530 s += what_len; 531 if (!globally) { 532 (void)strcpy(r, s); 533 return result; 534 } 535 } else 536 *r++ = *s++; 537 } 538 *r = '\0'; 539 return result; 540 } 541 542 static char *last_search_pat; /* last !?pat[?] search pattern */ 543 static char *last_search_match; /* last !?pat[?] that matched */ 544 545 const char * 546 get_history_event(const char *cmd, int *cindex, int qchar) 547 { 548 int idx, sign, sub, num, begin, ret; 549 size_t len; 550 char *pat; 551 const char *rptr; 552 HistEvent ev; 553 554 idx = *cindex; 555 if (cmd[idx++] != history_expansion_char) 556 return NULL; 557 558 /* find out which event to take */ 559 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 560 if (history(h, &ev, H_FIRST) != 0) 561 return NULL; 562 *cindex = cmd[idx]? (idx + 1):idx; 563 return ev.str; 564 } 565 sign = 0; 566 if (cmd[idx] == '-') { 567 sign = 1; 568 idx++; 569 } 570 571 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 572 HIST_ENTRY *he; 573 574 num = 0; 575 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 576 num = num * 10 + cmd[idx] - '0'; 577 idx++; 578 } 579 if (sign) 580 num = history_length - num + history_base; 581 582 if (!(he = history_get(num))) 583 return NULL; 584 585 *cindex = idx; 586 return he->line; 587 } 588 sub = 0; 589 if (cmd[idx] == '?') { 590 sub = 1; 591 idx++; 592 } 593 begin = idx; 594 while (cmd[idx]) { 595 if (cmd[idx] == '\n') 596 break; 597 if (sub && cmd[idx] == '?') 598 break; 599 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 600 || cmd[idx] == '\t' || cmd[idx] == qchar)) 601 break; 602 idx++; 603 } 604 len = (size_t)idx - (size_t)begin; 605 if (sub && cmd[idx] == '?') 606 idx++; 607 if (sub && len == 0 && last_search_pat && *last_search_pat) 608 pat = last_search_pat; 609 else if (len == 0) 610 return NULL; 611 else { 612 if ((pat = el_calloc(len + 1, sizeof(*pat))) == NULL) 613 return NULL; 614 (void)strlcpy(pat, cmd + begin, len + 1); 615 } 616 617 if (history(h, &ev, H_CURR) != 0) { 618 if (pat != last_search_pat) 619 el_free(pat); 620 return NULL; 621 } 622 num = ev.num; 623 624 if (sub) { 625 if (pat != last_search_pat) { 626 if (last_search_pat) 627 el_free(last_search_pat); 628 last_search_pat = pat; 629 } 630 ret = history_search(pat, -1); 631 } else 632 ret = history_search_prefix(pat, -1); 633 634 if (ret == -1) { 635 /* restore to end of list on failed search */ 636 history(h, &ev, H_FIRST); 637 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 638 if (pat != last_search_pat) 639 el_free(pat); 640 return NULL; 641 } 642 643 if (sub && len) { 644 if (last_search_match && last_search_match != pat) 645 el_free(last_search_match); 646 last_search_match = pat; 647 } 648 649 if (pat != last_search_pat) 650 el_free(pat); 651 652 if (history(h, &ev, H_CURR) != 0) 653 return NULL; 654 *cindex = idx; 655 rptr = ev.str; 656 657 /* roll back to original position */ 658 (void)history(h, &ev, H_SET, num); 659 660 return rptr; 661 } 662 663 /* 664 * the real function doing history expansion - takes as argument command 665 * to do and data upon which the command should be executed 666 * does expansion the way I've understood readline documentation 667 * 668 * returns 0 if data was not modified, 1 if it was and 2 if the string 669 * should be only printed and not executed; in case of error, 670 * returns -1 and *result points to NULL 671 * it's the caller's responsibility to free() the string returned in *result 672 */ 673 static int 674 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 675 char **result) 676 { 677 char *tmp, *search = NULL, *aptr; 678 const char *ptr, *cmd; 679 static char *from = NULL, *to = NULL; 680 int start, end, idx, has_mods = 0; 681 int p_on = 0, g_on = 0; 682 683 *result = NULL; 684 aptr = NULL; 685 ptr = NULL; 686 687 /* First get event specifier */ 688 idx = 0; 689 690 if (strchr(":^*$", command[offs + 1])) { 691 char str[4]; 692 /* 693 * "!:" is shorthand for "!!:". 694 * "!^", "!*" and "!$" are shorthand for 695 * "!!:^", "!!:*" and "!!:$" respectively. 696 */ 697 str[0] = str[1] = '!'; 698 str[2] = '0'; 699 ptr = get_history_event(str, &idx, 0); 700 idx = (command[offs + 1] == ':')? 1:0; 701 has_mods = 1; 702 } else { 703 if (command[offs + 1] == '#') { 704 /* use command so far */ 705 if ((aptr = el_calloc(offs + 1, sizeof(*aptr))) 706 == NULL) 707 return -1; 708 (void)strlcpy(aptr, command, offs + 1); 709 idx = 1; 710 } else { 711 int qchar; 712 713 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 714 ptr = get_history_event(command + offs, &idx, qchar); 715 } 716 has_mods = command[offs + (size_t)idx] == ':'; 717 } 718 719 if (ptr == NULL && aptr == NULL) 720 return -1; 721 722 if (!has_mods) { 723 *result = strdup(aptr ? aptr : ptr); 724 if (aptr) 725 el_free(aptr); 726 if (*result == NULL) 727 return -1; 728 return 1; 729 } 730 731 cmd = command + offs + idx + 1; 732 733 /* Now parse any word designators */ 734 735 if (*cmd == '%') /* last word matched by ?pat? */ 736 tmp = strdup(last_search_match? last_search_match:""); 737 else if (strchr("^*$-0123456789", *cmd)) { 738 start = end = -1; 739 if (*cmd == '^') 740 start = end = 1, cmd++; 741 else if (*cmd == '$') 742 start = -1, cmd++; 743 else if (*cmd == '*') 744 start = 1, cmd++; 745 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 746 start = 0; 747 while (*cmd && '0' <= *cmd && *cmd <= '9') 748 start = start * 10 + *cmd++ - '0'; 749 750 if (*cmd == '-') { 751 if (isdigit((unsigned char) cmd[1])) { 752 cmd++; 753 end = 0; 754 while (*cmd && '0' <= *cmd && *cmd <= '9') 755 end = end * 10 + *cmd++ - '0'; 756 } else if (cmd[1] == '$') { 757 cmd += 2; 758 end = -1; 759 } else { 760 cmd++; 761 end = -2; 762 } 763 } else if (*cmd == '*') 764 end = -1, cmd++; 765 else 766 end = start; 767 } 768 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 769 if (tmp == NULL) { 770 (void)fprintf(rl_outstream, "%s: Bad word specifier", 771 command + offs + idx); 772 if (aptr) 773 el_free(aptr); 774 return -1; 775 } 776 } else 777 tmp = strdup(aptr? aptr:ptr); 778 779 if (aptr) 780 el_free(aptr); 781 782 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 783 *result = tmp; 784 return 1; 785 } 786 787 for (; *cmd; cmd++) { 788 if (*cmd == ':') 789 continue; 790 else if (*cmd == 'h') { /* remove trailing path */ 791 if ((aptr = strrchr(tmp, '/')) != NULL) 792 *aptr = '\0'; 793 } else if (*cmd == 't') { /* remove leading path */ 794 if ((aptr = strrchr(tmp, '/')) != NULL) { 795 aptr = strdup(aptr + 1); 796 el_free(tmp); 797 tmp = aptr; 798 } 799 } else if (*cmd == 'r') { /* remove trailing suffix */ 800 if ((aptr = strrchr(tmp, '.')) != NULL) 801 *aptr = '\0'; 802 } else if (*cmd == 'e') { /* remove all but suffix */ 803 if ((aptr = strrchr(tmp, '.')) != NULL) { 804 aptr = strdup(aptr); 805 el_free(tmp); 806 tmp = aptr; 807 } 808 } else if (*cmd == 'p') /* print only */ 809 p_on = 1; 810 else if (*cmd == 'g') 811 g_on = 2; 812 else if (*cmd == 's' || *cmd == '&') { 813 char *what, *with, delim; 814 size_t len, from_len; 815 size_t size; 816 817 if (*cmd == '&' && (from == NULL || to == NULL)) 818 continue; 819 else if (*cmd == 's') { 820 delim = *(++cmd), cmd++; 821 size = 16; 822 what = el_realloc(from, size * sizeof(*what)); 823 if (what == NULL) { 824 el_free(from); 825 el_free(tmp); 826 return 0; 827 } 828 len = 0; 829 for (; *cmd && *cmd != delim; cmd++) { 830 if (*cmd == '\\' && cmd[1] == delim) 831 cmd++; 832 if (len >= size) { 833 char *nwhat; 834 nwhat = el_realloc(what, 835 (size <<= 1) * 836 sizeof(*nwhat)); 837 if (nwhat == NULL) { 838 el_free(what); 839 el_free(tmp); 840 return 0; 841 } 842 what = nwhat; 843 } 844 what[len++] = *cmd; 845 } 846 what[len] = '\0'; 847 from = what; 848 if (*what == '\0') { 849 el_free(what); 850 if (search) { 851 from = strdup(search); 852 if (from == NULL) { 853 el_free(tmp); 854 return 0; 855 } 856 } else { 857 from = NULL; 858 el_free(tmp); 859 return -1; 860 } 861 } 862 cmd++; /* shift after delim */ 863 if (!*cmd) 864 continue; 865 866 size = 16; 867 with = el_realloc(to, size * sizeof(*with)); 868 if (with == NULL) { 869 el_free(to); 870 el_free(tmp); 871 return -1; 872 } 873 len = 0; 874 from_len = strlen(from); 875 for (; *cmd && *cmd != delim; cmd++) { 876 if (len + from_len + 1 >= size) { 877 char *nwith; 878 size += from_len + 1; 879 nwith = el_realloc(with, 880 size * sizeof(*nwith)); 881 if (nwith == NULL) { 882 el_free(with); 883 el_free(tmp); 884 return -1; 885 } 886 with = nwith; 887 } 888 if (*cmd == '&') { 889 /* safe */ 890 (void)strcpy(&with[len], from); 891 len += from_len; 892 continue; 893 } 894 if (*cmd == '\\' 895 && (*(cmd + 1) == delim 896 || *(cmd + 1) == '&')) 897 cmd++; 898 with[len++] = *cmd; 899 } 900 with[len] = '\0'; 901 to = with; 902 } 903 904 aptr = _rl_compat_sub(tmp, from, to, g_on); 905 if (aptr) { 906 el_free(tmp); 907 tmp = aptr; 908 } 909 g_on = 0; 910 } 911 } 912 *result = tmp; 913 return p_on? 2:1; 914 } 915 916 917 /* 918 * csh-style history expansion 919 */ 920 int 921 history_expand(char *str, char **output) 922 { 923 int ret = 0; 924 size_t idx, i, size; 925 char *tmp, *result; 926 927 if (h == NULL || e == NULL) 928 rl_initialize(); 929 930 if (history_expansion_char == 0) { 931 *output = strdup(str); 932 return 0; 933 } 934 935 *output = NULL; 936 if (str[0] == history_subst_char) { 937 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 938 *output = el_calloc(strlen(str) + 4 + 1, sizeof(**output)); 939 if (*output == NULL) 940 return 0; 941 (*output)[0] = (*output)[1] = history_expansion_char; 942 (*output)[2] = ':'; 943 (*output)[3] = 's'; 944 (void)strcpy((*output) + 4, str); 945 str = *output; 946 } else { 947 *output = strdup(str); 948 if (*output == NULL) 949 return 0; 950 } 951 952 #define ADD_STRING(what, len, fr) \ 953 { \ 954 if (idx + len + 1 > size) { \ 955 char *nresult = el_realloc(result, \ 956 (size += len + 1) * sizeof(*nresult)); \ 957 if (nresult == NULL) { \ 958 el_free(*output); \ 959 if (/*CONSTCOND*/fr) \ 960 el_free(tmp); \ 961 return 0; \ 962 } \ 963 result = nresult; \ 964 } \ 965 (void)strlcpy(&result[idx], what, len + 1); \ 966 idx += len; \ 967 } 968 969 result = NULL; 970 size = idx = 0; 971 tmp = NULL; 972 for (i = 0; str[i];) { 973 int qchar, loop_again; 974 size_t len, start, j; 975 976 qchar = 0; 977 loop_again = 1; 978 start = j = i; 979 loop: 980 for (; str[j]; j++) { 981 if (str[j] == '\\' && 982 str[j + 1] == history_expansion_char) { 983 len = strlen(&str[j + 1]) + 1; 984 memmove(&str[j], &str[j + 1], len); 985 continue; 986 } 987 if (!loop_again) { 988 if (isspace((unsigned char) str[j]) 989 || str[j] == qchar) 990 break; 991 } 992 if (str[j] == history_expansion_char 993 && !strchr(history_no_expand_chars, str[j + 1]) 994 && (!history_inhibit_expansion_function || 995 (*history_inhibit_expansion_function)(str, 996 (int)j) == 0)) 997 break; 998 } 999 1000 if (str[j] && loop_again) { 1001 i = j; 1002 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 1003 j++; 1004 if (str[j] == history_expansion_char) 1005 j++; 1006 loop_again = 0; 1007 goto loop; 1008 } 1009 len = i - start; 1010 ADD_STRING(&str[start], len, 0); 1011 1012 if (str[i] == '\0' || str[i] != history_expansion_char) { 1013 len = j - i; 1014 ADD_STRING(&str[i], len, 0); 1015 if (start == 0) 1016 ret = 0; 1017 else 1018 ret = 1; 1019 break; 1020 } 1021 ret = _history_expand_command (str, i, (j - i), &tmp); 1022 if (ret > 0 && tmp) { 1023 len = strlen(tmp); 1024 ADD_STRING(tmp, len, 1); 1025 } 1026 if (tmp) { 1027 el_free(tmp); 1028 tmp = NULL; 1029 } 1030 i = j; 1031 } 1032 1033 /* ret is 2 for "print only" option */ 1034 if (ret == 2) { 1035 add_history(result); 1036 #ifdef GDB_411_HACK 1037 /* gdb 4.11 has been shipped with readline, where */ 1038 /* history_expand() returned -1 when the line */ 1039 /* should not be executed; in readline 2.1+ */ 1040 /* it should return 2 in such a case */ 1041 ret = -1; 1042 #endif 1043 } 1044 el_free(*output); 1045 *output = result; 1046 1047 return ret; 1048 } 1049 1050 /* 1051 * Return a string consisting of arguments of "str" from "start" to "end". 1052 */ 1053 char * 1054 history_arg_extract(int start, int end, const char *str) 1055 { 1056 size_t i, len, max; 1057 char **arr, *result = NULL; 1058 1059 arr = history_tokenize(str); 1060 if (!arr) 1061 return NULL; 1062 if (arr && *arr == NULL) 1063 goto out; 1064 1065 for (max = 0; arr[max]; max++) 1066 continue; 1067 max--; 1068 1069 if (start == '$') 1070 start = (int)max; 1071 if (end == '$') 1072 end = (int)max; 1073 if (end < 0) 1074 end = (int)max + end + 1; 1075 if (start < 0) 1076 start = end; 1077 1078 if (start < 0 || end < 0 || (size_t)start > max || 1079 (size_t)end > max || start > end) 1080 goto out; 1081 1082 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1083 len += strlen(arr[i]) + 1; 1084 len++; 1085 result = el_calloc(len, sizeof(*result)); 1086 if (result == NULL) 1087 goto out; 1088 1089 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1090 (void)strcpy(result + len, arr[i]); 1091 len += strlen(arr[i]); 1092 if (i < (size_t)end) 1093 result[len++] = ' '; 1094 } 1095 result[len] = '\0'; 1096 1097 out: 1098 for (i = 0; arr[i]; i++) 1099 el_free(arr[i]); 1100 el_free(arr); 1101 1102 return result; 1103 } 1104 1105 /* 1106 * Parse the string into individual tokens, 1107 * similar to how shell would do it. 1108 */ 1109 char ** 1110 history_tokenize(const char *str) 1111 { 1112 int size = 1, idx = 0, i, start; 1113 size_t len; 1114 char **result = NULL, *temp, delim = '\0'; 1115 1116 for (i = 0; str[i];) { 1117 while (isspace((unsigned char) str[i])) 1118 i++; 1119 start = i; 1120 for (; str[i];) { 1121 if (str[i] == '\\') { 1122 if (str[i+1] != '\0') 1123 i++; 1124 } else if (str[i] == delim) 1125 delim = '\0'; 1126 else if (!delim && 1127 (isspace((unsigned char) str[i]) || 1128 strchr("()<>;&|$", str[i]))) 1129 break; 1130 else if (!delim && strchr("'`\"", str[i])) 1131 delim = str[i]; 1132 if (str[i]) 1133 i++; 1134 } 1135 1136 if (idx + 2 >= size) { 1137 char **nresult; 1138 size <<= 1; 1139 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1140 if (nresult == NULL) { 1141 el_free(result); 1142 return NULL; 1143 } 1144 result = nresult; 1145 } 1146 len = (size_t)i - (size_t)start; 1147 temp = el_calloc(len + 1, sizeof(*temp)); 1148 if (temp == NULL) { 1149 for (i = 0; i < idx; i++) 1150 el_free(result[i]); 1151 el_free(result); 1152 return NULL; 1153 } 1154 (void)strlcpy(temp, &str[start], len + 1); 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 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 (pass = getpwent()) != NULL 1832 && text[0] == pass->pw_name[0] 1833 && strcmp(text, pass->pw_name) == 0) 1834 continue; 1835 1836 if (pass == NULL) { 1837 endpwent(); 1838 return NULL; 1839 } 1840 return strdup(pass->pw_name); 1841 } 1842 1843 1844 /* 1845 * el-compatible wrapper to send TSTP on ^Z 1846 */ 1847 /* ARGSUSED */ 1848 static unsigned char 1849 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1850 { 1851 (void)kill(0, SIGTSTP); 1852 return CC_NORM; 1853 } 1854 1855 static const char * 1856 /*ARGSUSED*/ 1857 _rl_completion_append_character_function(const char *dummy 1858 __attribute__((__unused__))) 1859 { 1860 static char buf[2]; 1861 buf[0] = (char)rl_completion_append_character; 1862 buf[1] = '\0'; 1863 return buf; 1864 } 1865 1866 1867 /* 1868 * Display list of strings in columnar format on readline's output stream. 1869 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1870 * 'max' is maximum length of string in 'matches'. 1871 */ 1872 void 1873 rl_display_match_list(char **matches, int len, int max) 1874 { 1875 1876 fn_display_match_list(e, matches, (size_t)len, (size_t)max, 1877 _rl_completion_append_character_function); 1878 } 1879 1880 /* 1881 * complete word at current point 1882 */ 1883 /* ARGSUSED */ 1884 int 1885 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1886 { 1887 static ct_buffer_t wbreak_conv, sprefix_conv; 1888 const char *breakchars; 1889 1890 if (h == NULL || e == NULL) 1891 rl_initialize(); 1892 1893 if (rl_inhibit_completion) { 1894 char arr[2]; 1895 arr[0] = (char)invoking_key; 1896 arr[1] = '\0'; 1897 el_insertstr(e, arr); 1898 return CC_REFRESH; 1899 } 1900 1901 if (rl_completion_word_break_hook != NULL) 1902 breakchars = (*rl_completion_word_break_hook)(); 1903 else 1904 breakchars = rl_basic_word_break_characters; 1905 1906 _rl_update_pos(); 1907 1908 /* Just look at how many global variables modify this operation! */ 1909 return fn_complete(e, 1910 (rl_compentry_func_t *)rl_completion_entry_function, 1911 rl_attempted_completion_function, 1912 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1913 ct_decode_string(breakchars, &sprefix_conv), 1914 _rl_completion_append_character_function, 1915 (size_t)rl_completion_query_items, 1916 &rl_completion_type, &rl_attempted_completion_over, 1917 &rl_point, &rl_end); 1918 1919 1920 } 1921 1922 1923 /* ARGSUSED */ 1924 static unsigned char 1925 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1926 { 1927 return (unsigned char)rl_complete(0, ch); 1928 } 1929 1930 /* 1931 * misc other functions 1932 */ 1933 1934 /* 1935 * bind key c to readline-type function func 1936 */ 1937 int 1938 rl_bind_key(int c, rl_command_func_t *func) 1939 { 1940 int retval = -1; 1941 1942 if (h == NULL || e == NULL) 1943 rl_initialize(); 1944 1945 if (func == rl_insert) { 1946 /* XXX notice there is no range checking of ``c'' */ 1947 e->el_map.key[c] = ED_INSERT; 1948 retval = 0; 1949 } 1950 return retval; 1951 } 1952 1953 1954 /* 1955 * read one key from input - handles chars pushed back 1956 * to input stream also 1957 */ 1958 int 1959 rl_read_key(void) 1960 { 1961 char fooarr[2 * sizeof(int)]; 1962 1963 if (e == NULL || h == NULL) 1964 rl_initialize(); 1965 1966 return el_getc(e, fooarr); 1967 } 1968 1969 1970 /* 1971 * reset the terminal 1972 */ 1973 /* ARGSUSED */ 1974 int 1975 rl_reset_terminal(const char *p __attribute__((__unused__))) 1976 { 1977 1978 if (h == NULL || e == NULL) 1979 rl_initialize(); 1980 el_reset(e); 1981 return 0; 1982 } 1983 1984 1985 /* 1986 * insert character ``c'' back into input stream, ``count'' times 1987 */ 1988 int 1989 rl_insert(int count, int c) 1990 { 1991 char arr[2]; 1992 1993 if (h == NULL || e == NULL) 1994 rl_initialize(); 1995 1996 /* XXX - int -> char conversion can lose on multichars */ 1997 arr[0] = (char)c; 1998 arr[1] = '\0'; 1999 2000 for (; count > 0; count--) 2001 el_push(e, arr); 2002 2003 return 0; 2004 } 2005 2006 int 2007 rl_insert_text(const char *text) 2008 { 2009 if (!text || *text == 0) 2010 return 0; 2011 2012 if (h == NULL || e == NULL) 2013 rl_initialize(); 2014 2015 if (el_insertstr(e, text) < 0) 2016 return 0; 2017 return (int)strlen(text); 2018 } 2019 2020 /*ARGSUSED*/ 2021 int 2022 rl_newline(int count __attribute__((__unused__)), 2023 int c __attribute__((__unused__))) 2024 { 2025 /* 2026 * Readline-4.0 appears to ignore the args. 2027 */ 2028 return rl_insert(1, '\n'); 2029 } 2030 2031 /*ARGSUSED*/ 2032 static unsigned char 2033 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 2034 { 2035 if (map[c] == NULL) 2036 return CC_ERROR; 2037 2038 _rl_update_pos(); 2039 2040 (*map[c])(1, c); 2041 2042 /* If rl_done was set by the above call, deal with it here */ 2043 if (rl_done) 2044 return CC_EOF; 2045 2046 return CC_NORM; 2047 } 2048 2049 int 2050 rl_add_defun(const char *name, rl_command_func_t *fun, int c) 2051 { 2052 char dest[8]; 2053 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 2054 return -1; 2055 map[(unsigned char)c] = fun; 2056 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 2057 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 2058 el_set(e, EL_BIND, dest, name, NULL); 2059 return 0; 2060 } 2061 2062 void 2063 rl_callback_read_char(void) 2064 { 2065 int count = 0, done = 0; 2066 const char *buf = el_gets(e, &count); 2067 char *wbuf; 2068 2069 if (buf == NULL || count-- <= 0) 2070 return; 2071 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 2072 done = 1; 2073 if (buf[count] == '\n' || buf[count] == '\r') 2074 done = 2; 2075 2076 if (done && rl_linefunc != NULL) { 2077 el_set(e, EL_UNBUFFERED, 0); 2078 if (done == 2) { 2079 if ((wbuf = strdup(buf)) != NULL) 2080 wbuf[count] = '\0'; 2081 } else 2082 wbuf = NULL; 2083 (*(void (*)(const char *))rl_linefunc)(wbuf); 2084 el_set(e, EL_UNBUFFERED, 1); 2085 } 2086 } 2087 2088 void 2089 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc) 2090 { 2091 if (e == NULL) { 2092 rl_initialize(); 2093 } 2094 (void)rl_set_prompt(prompt); 2095 rl_linefunc = linefunc; 2096 el_set(e, EL_UNBUFFERED, 1); 2097 } 2098 2099 void 2100 rl_callback_handler_remove(void) 2101 { 2102 rl_linefunc = NULL; 2103 el_end(e); 2104 e = NULL; 2105 } 2106 2107 void 2108 rl_redisplay(void) 2109 { 2110 char a[2]; 2111 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2112 a[1] = '\0'; 2113 el_push(e, a); 2114 } 2115 2116 int 2117 rl_get_previous_history(int count, int key) 2118 { 2119 char a[2]; 2120 a[0] = (char)key; 2121 a[1] = '\0'; 2122 while (count--) 2123 el_push(e, a); 2124 return 0; 2125 } 2126 2127 void 2128 /*ARGSUSED*/ 2129 rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2130 { 2131 el_set(e, EL_PREP_TERM, 1); 2132 } 2133 2134 void 2135 rl_deprep_terminal(void) 2136 { 2137 el_set(e, EL_PREP_TERM, 0); 2138 } 2139 2140 int 2141 rl_read_init_file(const char *s) 2142 { 2143 return el_source(e, s); 2144 } 2145 2146 int 2147 rl_parse_and_bind(const char *line) 2148 { 2149 const char **argv; 2150 int argc; 2151 Tokenizer *tok; 2152 2153 tok = tok_init(NULL); 2154 tok_str(tok, line, &argc, &argv); 2155 argc = el_parse(e, argc, argv); 2156 tok_end(tok); 2157 return argc ? 1 : 0; 2158 } 2159 2160 int 2161 rl_variable_bind(const char *var, const char *value) 2162 { 2163 /* 2164 * The proper return value is undocument, but this is what the 2165 * readline source seems to do. 2166 */ 2167 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2168 } 2169 2170 int 2171 rl_stuff_char(int c) 2172 { 2173 char buf[2]; 2174 2175 buf[0] = (char)c; 2176 buf[1] = '\0'; 2177 el_insertstr(e, buf); 2178 return 1; 2179 } 2180 2181 static int 2182 _rl_event_read_char(EditLine *el, wchar_t *wc) 2183 { 2184 char ch; 2185 int n; 2186 ssize_t num_read = 0; 2187 2188 ch = '\0'; 2189 *wc = L'\0'; 2190 while (rl_event_hook) { 2191 2192 (*rl_event_hook)(); 2193 2194 #if defined(FIONREAD) 2195 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2196 return -1; 2197 if (n) 2198 num_read = read(el->el_infd, &ch, (size_t)1); 2199 else 2200 num_read = 0; 2201 #elif defined(F_SETFL) && defined(O_NDELAY) 2202 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2203 return -1; 2204 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2205 return -1; 2206 num_read = read(el->el_infd, &ch, 1); 2207 if (fcntl(el->el_infd, F_SETFL, n)) 2208 return -1; 2209 #else 2210 /* not non-blocking, but what you gonna do? */ 2211 num_read = read(el->el_infd, &ch, 1); 2212 return -1; 2213 #endif 2214 2215 if (num_read < 0 && errno == EAGAIN) 2216 continue; 2217 if (num_read == 0) 2218 continue; 2219 break; 2220 } 2221 if (!rl_event_hook) 2222 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2223 *wc = (wchar_t)ch; 2224 return (int)num_read; 2225 } 2226 2227 static void 2228 _rl_update_pos(void) 2229 { 2230 const LineInfo *li = el_line(e); 2231 2232 rl_point = (int)(li->cursor - li->buffer); 2233 rl_end = (int)(li->lastchar - li->buffer); 2234 rl_line_buffer[rl_end] = '\0'; 2235 } 2236 2237 void 2238 rl_get_screen_size(int *rows, int *cols) 2239 { 2240 if (rows) 2241 el_get(e, EL_GETTC, "li", rows); 2242 if (cols) 2243 el_get(e, EL_GETTC, "co", cols); 2244 } 2245 2246 void 2247 rl_set_screen_size(int rows, int cols) 2248 { 2249 char buf[64]; 2250 (void)snprintf(buf, sizeof(buf), "%d", rows); 2251 el_set(e, EL_SETTC, "li", buf, NULL); 2252 (void)snprintf(buf, sizeof(buf), "%d", cols); 2253 el_set(e, EL_SETTC, "co", buf, NULL); 2254 } 2255 2256 char ** 2257 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2258 { 2259 size_t len, max, i, j, min; 2260 char **list, *match, *a, *b; 2261 2262 len = 1; 2263 max = 10; 2264 if ((list = el_calloc(max, sizeof(*list))) == NULL) 2265 return NULL; 2266 2267 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2268 list[len++] = match; 2269 if (len == max) { 2270 char **nl; 2271 max += 10; 2272 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2273 goto out; 2274 list = nl; 2275 } 2276 } 2277 if (len == 1) 2278 goto out; 2279 list[len] = NULL; 2280 if (len == 2) { 2281 if ((list[0] = strdup(list[1])) == NULL) 2282 goto out; 2283 return list; 2284 } 2285 qsort(&list[1], len - 1, sizeof(*list), 2286 (int (*)(const void *, const void *)) strcmp); 2287 min = SIZE_MAX; 2288 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2289 b = list[i + 1]; 2290 for (j = 0; a[j] && a[j] == b[j]; j++) 2291 continue; 2292 if (min > j) 2293 min = j; 2294 } 2295 if (min == 0 && *str) { 2296 if ((list[0] = strdup(str)) == NULL) 2297 goto out; 2298 } else { 2299 if ((list[0] = el_calloc(min + 1, sizeof(*list[0]))) == NULL) 2300 goto out; 2301 (void)memcpy(list[0], list[1], min); 2302 list[0][min] = '\0'; 2303 } 2304 return list; 2305 2306 out: 2307 el_free(list); 2308 return NULL; 2309 } 2310 2311 char * 2312 rl_filename_completion_function (const char *text, int state) 2313 { 2314 return fn_filename_completion_function(text, state); 2315 } 2316 2317 void 2318 rl_forced_update_display(void) 2319 { 2320 el_set(e, EL_REFRESH); 2321 } 2322 2323 int 2324 _rl_abort_internal(void) 2325 { 2326 el_beep(e); 2327 longjmp(topbuf, 1); 2328 /*NOTREACHED*/ 2329 } 2330 2331 int 2332 _rl_qsort_string_compare(char **s1, char **s2) 2333 { 2334 return strcoll(*s1, *s2); 2335 } 2336 2337 HISTORY_STATE * 2338 history_get_history_state(void) 2339 { 2340 HISTORY_STATE *hs; 2341 2342 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2343 return NULL; 2344 hs->length = history_length; 2345 return hs; 2346 } 2347 2348 int 2349 /*ARGSUSED*/ 2350 rl_kill_text(int from __attribute__((__unused__)), 2351 int to __attribute__((__unused__))) 2352 { 2353 return 0; 2354 } 2355 2356 Keymap 2357 rl_make_bare_keymap(void) 2358 { 2359 return NULL; 2360 } 2361 2362 Keymap 2363 rl_get_keymap(void) 2364 { 2365 return NULL; 2366 } 2367 2368 void 2369 /*ARGSUSED*/ 2370 rl_set_keymap(Keymap k __attribute__((__unused__))) 2371 { 2372 } 2373 2374 int 2375 /*ARGSUSED*/ 2376 rl_generic_bind(int type __attribute__((__unused__)), 2377 const char * keyseq __attribute__((__unused__)), 2378 const char * data __attribute__((__unused__)), 2379 Keymap k __attribute__((__unused__))) 2380 { 2381 return 0; 2382 } 2383 2384 int 2385 /*ARGSUSED*/ 2386 rl_bind_key_in_map(int key __attribute__((__unused__)), 2387 rl_command_func_t *fun __attribute__((__unused__)), 2388 Keymap k __attribute__((__unused__))) 2389 { 2390 return 0; 2391 } 2392 2393 /* unsupported, but needed by python */ 2394 void 2395 rl_cleanup_after_signal(void) 2396 { 2397 } 2398 2399 int 2400 rl_on_new_line(void) 2401 { 2402 return 0; 2403 } 2404 2405 void 2406 rl_free_line_state(void) 2407 { 2408 } 2409 2410 int 2411 /*ARGSUSED*/ 2412 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2413 { 2414 return 0; 2415 } 2416 2417 void 2418 rl_resize_terminal(void) 2419 { 2420 el_resize(e); 2421 } 2422 2423 void 2424 rl_reset_after_signal(void) 2425 { 2426 if (rl_prep_term_function) 2427 (*rl_prep_term_function)(); 2428 } 2429 2430 void 2431 rl_echo_signal_char(int sig) 2432 { 2433 int c = tty_get_signal_character(e, sig); 2434 if (c == -1) 2435 return; 2436 re_putc(e, c, 0); 2437 } 2438