1 /* $OpenBSD: readline.c,v 1.29 2019/08/14 08:31:00 asou Exp $ */ 2 /* $NetBSD: readline.c,v 1.91 2010/08/28 15:44:59 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jaromir Dolecek. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include "config.h" 34 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <ctype.h> 38 #include <dirent.h> 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <limits.h> 42 #include <pwd.h> 43 #include <setjmp.h> 44 #include <stdint.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #ifdef HAVE_VIS_H 50 #include <vis.h> 51 #else 52 #include "np/vis.h" 53 #endif 54 #include "readline/readline.h" 55 #include "el.h" 56 #include "fcns.h" 57 #include "filecomplete.h" 58 59 void rl_prep_terminal(int); 60 void rl_deprep_terminal(void); 61 62 /* for rl_complete() */ 63 #define TAB '\r' 64 65 /* see comment at the #ifdef for sense of this */ 66 /* #define GDB_411_HACK */ 67 68 /* readline compatibility stuff - look at readline sources/documentation */ 69 /* to see what these variables mean */ 70 const char *rl_library_version = "EditLine wrapper"; 71 int rl_readline_version = RL_READLINE_VERSION; 72 static char empty[] = { '\0' }; 73 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 74 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 75 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 76 char *rl_readline_name = empty; 77 FILE *rl_instream = NULL; 78 FILE *rl_outstream = NULL; 79 int rl_point = 0; 80 int rl_end = 0; 81 char *rl_line_buffer = NULL; 82 VCPFunction *rl_linefunc = NULL; 83 int rl_done = 0; 84 VFunction *rl_event_hook = NULL; 85 KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 86 emacs_meta_keymap, 87 emacs_ctlx_keymap; 88 89 int history_base = 1; /* probably never subject to change */ 90 int history_length = 0; 91 int max_input_history = 0; 92 char history_expansion_char = '!'; 93 char history_subst_char = '^'; 94 char *history_no_expand_chars = expand_chars; 95 Function *history_inhibit_expansion_function = NULL; 96 char *history_arg_extract(int start, int end, const char *str); 97 98 int rl_inhibit_completion = 0; 99 int rl_attempted_completion_over = 0; 100 char *rl_basic_word_break_characters = break_chars; 101 char *rl_completer_word_break_characters = NULL; 102 char *rl_completer_quote_characters = NULL; 103 Function *rl_completion_entry_function = NULL; 104 CPPFunction *rl_attempted_completion_function = NULL; 105 Function *rl_pre_input_hook = NULL; 106 Function *rl_startup1_hook = NULL; 107 int (*rl_getc_function)(FILE *) = NULL; 108 char *rl_terminal_name = NULL; 109 int rl_already_prompted = 0; 110 int rl_filename_completion_desired = 0; 111 int rl_ignore_completion_duplicates = 0; 112 int rl_catch_signals = 1; 113 int readline_echoing_p = 1; 114 int _rl_print_completions_horizontally = 0; 115 VFunction *rl_redisplay_function = NULL; 116 Function *rl_startup_hook = NULL; 117 VFunction *rl_completion_display_matches_hook = NULL; 118 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 119 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 120 KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 121 122 /* 123 * The current prompt string. 124 */ 125 char *rl_prompt = NULL; 126 /* 127 * This is set to character indicating type of completion being done by 128 * rl_complete_internal(); this is available for application completion 129 * functions. 130 */ 131 int rl_completion_type = 0; 132 133 /* 134 * If more than this number of items results from query for possible 135 * completions, we ask user if they are sure to really display the list. 136 */ 137 int rl_completion_query_items = 100; 138 139 /* 140 * List of characters which are word break characters, but should be left 141 * in the parsed text when it is passed to the completion function. 142 * Shell uses this to help determine what kind of completing to do. 143 */ 144 char *rl_special_prefixes = NULL; 145 146 /* 147 * This is the character appended to the completed words if at the end of 148 * the line. Default is ' ' (a space). 149 */ 150 int rl_completion_append_character = ' '; 151 152 /* 153 * When the history cursor is on the newest element and next_history() 154 * is called, GNU readline moves the cursor beyond the newest element. 155 * The editline library does not provide data structures to express 156 * that state, so we need a local flag. 157 */ 158 static int current_history_valid = 1; 159 160 /* stuff below is used internally by libedit for readline emulation */ 161 162 static History *h = NULL; 163 static EditLine *e = NULL; 164 static Function *map[256]; 165 static jmp_buf topbuf; 166 167 /* internal functions */ 168 static unsigned char _el_rl_complete(EditLine *, int); 169 static unsigned char _el_rl_tstp(EditLine *, int); 170 static char *_get_prompt(EditLine *); 171 static int _getc_function(EditLine *, wchar_t *); 172 static HIST_ENTRY *_move_history(int); 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); 179 180 181 /* ARGSUSED */ 182 static char * 183 _get_prompt(EditLine *el __attribute__((__unused__))) 184 { 185 rl_already_prompted = 1; 186 return rl_prompt; 187 } 188 189 190 /* 191 * generic function for moving around history 192 */ 193 static HIST_ENTRY * 194 _move_history(int op) 195 { 196 HistEvent ev; 197 static HIST_ENTRY rl_he; 198 199 if (history(h, &ev, op) != 0) 200 return NULL; 201 202 rl_he.line = ev.str; 203 rl_he.data = NULL; 204 205 return &rl_he; 206 } 207 208 209 /* 210 * read one key from user defined input function 211 */ 212 static int 213 /*ARGSUSED*/ 214 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) 215 { 216 int i; 217 218 i = (*rl_getc_function)(NULL); 219 if (i == -1) 220 return 0; 221 *c = (wchar_t)i; 222 return 1; 223 } 224 225 static void 226 _resize_fun(EditLine *el, void *a) 227 { 228 const LineInfo *li; 229 char **ap = a; 230 231 li = el_line(el); 232 /* a cheesy way to get rid of const cast. */ 233 *ap = memchr(li->buffer, *li->buffer, 1); 234 } 235 236 static const char _dothistory[] = "/.history"; 237 238 static const char * 239 _default_history_file(void) 240 { 241 struct passwd *p; 242 static char path[PATH_MAX]; 243 244 if (*path) 245 return path; 246 if ((p = getpwuid(getuid())) == NULL) 247 return NULL; 248 strlcpy(path, p->pw_dir, PATH_MAX); 249 strlcat(path, _dothistory, PATH_MAX); 250 return path; 251 } 252 253 /* 254 * READLINE compatibility stuff 255 */ 256 257 /* 258 * Set the prompt 259 */ 260 int 261 rl_set_prompt(const char *prompt) 262 { 263 char *p; 264 265 if (!prompt) 266 prompt = ""; 267 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 268 return 0; 269 if (rl_prompt) 270 free(rl_prompt); 271 rl_prompt = strdup(prompt); 272 if (rl_prompt == NULL) 273 return -1; 274 275 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 276 *p = RL_PROMPT_START_IGNORE; 277 278 return 0; 279 } 280 281 /* 282 * initialize rl compat stuff 283 */ 284 int 285 rl_initialize(void) 286 { 287 HistEvent ev; 288 int editmode = 1; 289 struct termios t; 290 291 current_history_valid = 1; 292 293 if (e != NULL) 294 el_end(e); 295 if (h != NULL) 296 history_end(h); 297 298 if (!rl_instream) 299 rl_instream = stdin; 300 if (!rl_outstream) 301 rl_outstream = stdout; 302 303 /* 304 * See if we don't really want to run the editor 305 */ 306 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 307 editmode = 0; 308 309 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 310 311 if (!editmode) 312 el_set(e, EL_EDITMODE, 0); 313 314 h = history_init(); 315 if (!e || !h) 316 return -1; 317 318 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 319 history_length = 0; 320 max_input_history = INT_MAX; 321 el_set(e, EL_HIST, history, h); 322 323 /* Setup resize function */ 324 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 325 326 /* setup getc function if valid */ 327 if (rl_getc_function) 328 el_set(e, EL_GETCFN, _getc_function); 329 330 /* for proper prompt printing in readline() */ 331 if (rl_set_prompt("") == -1) { 332 history_end(h); 333 el_end(e); 334 return -1; 335 } 336 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 337 el_set(e, EL_SIGNAL, rl_catch_signals); 338 339 /* set default mode to "emacs"-style and read setting afterwards */ 340 /* so this can be overriden */ 341 el_set(e, EL_EDITOR, "emacs"); 342 if (rl_terminal_name != NULL) 343 el_set(e, EL_TERMINAL, rl_terminal_name); 344 else 345 el_get(e, EL_TERMINAL, &rl_terminal_name); 346 347 /* 348 * Word completion - this has to go AFTER rebinding keys 349 * to emacs-style. 350 */ 351 el_set(e, EL_ADDFN, "rl_complete", 352 "ReadLine compatible completion function", 353 _el_rl_complete); 354 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 355 356 /* 357 * Send TSTP when ^Z is pressed. 358 */ 359 el_set(e, EL_ADDFN, "rl_tstp", 360 "ReadLine compatible suspend function", 361 _el_rl_tstp); 362 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 363 364 /* read settings from configuration file */ 365 el_source(e, NULL); 366 367 /* 368 * Unfortunately, some applications really do use rl_point 369 * and rl_line_buffer directly. 370 */ 371 _resize_fun(e, &rl_line_buffer); 372 _rl_update_pos(); 373 374 if (rl_startup_hook) 375 (*rl_startup_hook)(NULL, 0); 376 377 return 0; 378 } 379 380 381 /* 382 * read one line from input stream and return it, chomping 383 * trailing newline (if there is any) 384 */ 385 char * 386 readline(const char *p) 387 { 388 HistEvent ev; 389 const char * volatile prompt = p; 390 int count; 391 const char *ret; 392 char *buf; 393 static int used_event_hook; 394 395 if (e == NULL || h == NULL) 396 rl_initialize(); 397 398 rl_done = 0; 399 400 (void)setjmp(topbuf); 401 402 /* update prompt accordingly to what has been passed */ 403 if (rl_set_prompt(prompt) == -1) 404 return NULL; 405 406 if (rl_pre_input_hook) 407 (*rl_pre_input_hook)(NULL, 0); 408 409 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 410 el_set(e, EL_GETCFN, _rl_event_read_char); 411 used_event_hook = 1; 412 } 413 414 if (!rl_event_hook && used_event_hook) { 415 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 416 used_event_hook = 0; 417 } 418 419 rl_already_prompted = 0; 420 421 /* get one line from input stream */ 422 ret = el_gets(e, &count); 423 424 if (ret && count > 0) { 425 int lastidx; 426 427 buf = strdup(ret); 428 if (buf == NULL) 429 return NULL; 430 lastidx = count - 1; 431 if (buf[lastidx] == '\n') 432 buf[lastidx] = '\0'; 433 } else 434 buf = NULL; 435 436 history(h, &ev, H_GETSIZE); 437 history_length = ev.num; 438 439 return buf; 440 } 441 442 /* 443 * history functions 444 */ 445 446 /* 447 * is normally called before application starts to use 448 * history expansion functions 449 */ 450 void 451 using_history(void) 452 { 453 if (h == NULL || e == NULL) 454 rl_initialize(); 455 } 456 457 458 /* 459 * substitute ``what'' with ``with'', returning resulting string; if 460 * globally == 1, substitutes all occurrences of what, otherwise only the 461 * first one 462 */ 463 static char * 464 _rl_compat_sub(const char *str, const char *what, const char *with, 465 int globally) 466 { 467 const char *s; 468 char *r, *result; 469 size_t len, with_len, what_len; 470 471 len = strlen(str); 472 with_len = strlen(with); 473 what_len = strlen(what); 474 475 /* calculate length we need for result */ 476 s = str; 477 while (*s) { 478 if (*s == *what && !strncmp(s, what, what_len)) { 479 len += with_len - what_len; 480 if (!globally) 481 break; 482 s += what_len; 483 } else 484 s++; 485 } 486 r = result = malloc(len + 1); 487 if (result == NULL) 488 return NULL; 489 s = str; 490 while (*s) { 491 if (*s == *what && !strncmp(s, what, what_len)) { 492 (void)strncpy(r, with, with_len); 493 r += with_len; 494 s += what_len; 495 if (!globally) { 496 (void)strlcpy(r, s, len); 497 return result; 498 } 499 } else 500 *r++ = *s++; 501 } 502 *r = '\0'; 503 return result; 504 } 505 506 static char *last_search_pat; /* last !?pat[?] search pattern */ 507 static char *last_search_match; /* last !?pat[?] that matched */ 508 509 const char * 510 get_history_event(const char *cmd, int *cindex, int qchar) 511 { 512 int idx, sign, sub, num, begin, ret; 513 size_t len; 514 char *pat; 515 const char *rptr; 516 HistEvent ev; 517 518 idx = *cindex; 519 if (cmd[idx++] != history_expansion_char) 520 return NULL; 521 522 /* find out which event to take */ 523 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 524 if (history(h, &ev, H_FIRST) != 0) 525 return NULL; 526 *cindex = cmd[idx]? (idx + 1):idx; 527 return ev.str; 528 } 529 sign = 0; 530 if (cmd[idx] == '-') { 531 sign = 1; 532 idx++; 533 } 534 535 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 536 HIST_ENTRY *rl_he; 537 538 num = 0; 539 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 540 num = num * 10 + cmd[idx] - '0'; 541 idx++; 542 } 543 if (sign) 544 num = history_length - num + 1; 545 546 if (!(rl_he = history_get(num))) 547 return NULL; 548 549 *cindex = idx; 550 return rl_he->line; 551 } 552 sub = 0; 553 if (cmd[idx] == '?') { 554 sub = 1; 555 idx++; 556 } 557 begin = idx; 558 while (cmd[idx]) { 559 if (cmd[idx] == '\n') 560 break; 561 if (sub && cmd[idx] == '?') 562 break; 563 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 564 || cmd[idx] == '\t' || cmd[idx] == qchar)) 565 break; 566 idx++; 567 } 568 len = idx - begin; 569 if (sub && cmd[idx] == '?') 570 idx++; 571 if (sub && len == 0 && last_search_pat && *last_search_pat) 572 pat = last_search_pat; 573 else if (len == 0) 574 return NULL; 575 else { 576 if ((pat = malloc(len + 1)) == NULL) 577 return NULL; 578 (void)strncpy(pat, cmd + begin, len); 579 pat[len] = '\0'; 580 } 581 582 if (history(h, &ev, H_CURR) != 0) { 583 if (pat != last_search_pat) 584 free(pat); 585 return NULL; 586 } 587 num = ev.num; 588 589 if (sub) { 590 if (pat != last_search_pat) { 591 if (last_search_pat) 592 free(last_search_pat); 593 last_search_pat = pat; 594 } 595 ret = history_search(pat, -1); 596 } else 597 ret = history_search_prefix(pat, -1); 598 599 if (ret == -1) { 600 /* restore to end of list on failed search */ 601 history(h, &ev, H_FIRST); 602 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 603 if (pat != last_search_pat) 604 free(pat); 605 return NULL; 606 } 607 608 if (sub && len) { 609 if (last_search_match && last_search_match != pat) 610 free(last_search_match); 611 last_search_match = pat; 612 } 613 614 if (pat != last_search_pat) 615 free(pat); 616 617 if (history(h, &ev, H_CURR) != 0) 618 return NULL; 619 *cindex = idx; 620 rptr = ev.str; 621 622 /* roll back to original position */ 623 (void)history(h, &ev, H_SET, num); 624 625 return rptr; 626 } 627 628 /* 629 * the real function doing history expansion - takes as argument command 630 * to do and data upon which the command should be executed 631 * does expansion the way I've understood readline documentation 632 * 633 * returns 0 if data was not modified, 1 if it was and 2 if the string 634 * should be only printed and not executed; in case of error, 635 * returns -1 and *result points to NULL 636 * it's the caller's responsibility to free() the string returned in *result 637 */ 638 static int 639 _history_expand_command(const char *command, size_t offs, size_t cmdlen, 640 char **result) 641 { 642 char *tmp, *search = NULL, *aptr; 643 const char *ptr, *cmd; 644 static char *from = NULL, *to = NULL; 645 int start, end, idx, has_mods = 0; 646 int p_on = 0, g_on = 0; 647 648 *result = NULL; 649 aptr = NULL; 650 ptr = NULL; 651 652 /* First get event specifier */ 653 idx = 0; 654 655 if (strchr(":^*$", command[offs + 1])) { 656 char str[4]; 657 /* 658 * "!:" is shorthand for "!!:". 659 * "!^", "!*" and "!$" are shorthand for 660 * "!!:^", "!!:*" and "!!:$" respectively. 661 */ 662 str[0] = str[1] = '!'; 663 str[2] = '0'; 664 ptr = get_history_event(str, &idx, 0); 665 idx = (command[offs + 1] == ':')? 1:0; 666 has_mods = 1; 667 } else { 668 if (command[offs + 1] == '#') { 669 /* use command so far */ 670 if ((aptr = malloc(offs + 1)) == NULL) 671 return -1; 672 (void)strncpy(aptr, command, offs); 673 aptr[offs] = '\0'; 674 idx = 1; 675 } else { 676 int qchar; 677 678 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 679 ptr = get_history_event(command + offs, &idx, qchar); 680 } 681 has_mods = command[offs + idx] == ':'; 682 } 683 684 if (ptr == NULL && aptr == NULL) 685 return -1; 686 687 if (!has_mods) { 688 *result = strdup(aptr ? aptr : ptr); 689 if (aptr) 690 free(aptr); 691 if (*result == NULL) 692 return -1; 693 return 1; 694 } 695 696 cmd = command + offs + idx + 1; 697 698 /* Now parse any word designators */ 699 700 if (*cmd == '%') /* last word matched by ?pat? */ 701 tmp = strdup(last_search_match? last_search_match:""); 702 else if (strchr("^*$-0123456789", *cmd)) { 703 start = end = -1; 704 if (*cmd == '^') 705 start = end = 1, cmd++; 706 else if (*cmd == '$') 707 start = -1, cmd++; 708 else if (*cmd == '*') 709 start = 1, cmd++; 710 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 711 start = 0; 712 while (*cmd && '0' <= *cmd && *cmd <= '9') 713 start = start * 10 + *cmd++ - '0'; 714 715 if (*cmd == '-') { 716 if (isdigit((unsigned char) cmd[1])) { 717 cmd++; 718 end = 0; 719 while (*cmd && '0' <= *cmd && *cmd <= '9') 720 end = end * 10 + *cmd++ - '0'; 721 } else if (cmd[1] == '$') { 722 cmd += 2; 723 end = -1; 724 } else { 725 cmd++; 726 end = -2; 727 } 728 } else if (*cmd == '*') 729 end = -1, cmd++; 730 else 731 end = start; 732 } 733 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 734 if (tmp == NULL) { 735 (void)fprintf(rl_outstream, "%s: Bad word specifier", 736 command + offs + idx); 737 if (aptr) 738 free(aptr); 739 return -1; 740 } 741 } else 742 tmp = strdup(aptr? aptr:ptr); 743 744 if (aptr) 745 free(aptr); 746 747 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 748 *result = tmp; 749 return 1; 750 } 751 752 for (; *cmd; cmd++) { 753 if (*cmd == ':') 754 continue; 755 else if (*cmd == 'h') { /* remove trailing path */ 756 if ((aptr = strrchr(tmp, '/')) != NULL) 757 *aptr = '\0'; 758 } else if (*cmd == 't') { /* remove leading path */ 759 if ((aptr = strrchr(tmp, '/')) != NULL) { 760 aptr = strdup(aptr + 1); 761 free(tmp); 762 tmp = aptr; 763 } 764 } else if (*cmd == 'r') { /* remove trailing suffix */ 765 if ((aptr = strrchr(tmp, '.')) != NULL) 766 *aptr = '\0'; 767 } else if (*cmd == 'e') { /* remove all but suffix */ 768 if ((aptr = strrchr(tmp, '.')) != NULL) { 769 aptr = strdup(aptr); 770 free(tmp); 771 tmp = aptr; 772 } 773 } else if (*cmd == 'p') /* print only */ 774 p_on = 1; 775 else if (*cmd == 'g') 776 g_on = 2; 777 else if (*cmd == 's' || *cmd == '&') { 778 char *what, *with, delim; 779 size_t len, from_len; 780 size_t size; 781 782 if (*cmd == '&' && (from == NULL || to == NULL)) 783 continue; 784 else if (*cmd == 's') { 785 delim = *(++cmd), cmd++; 786 size = 16; 787 what = realloc(from, size); 788 if (what == NULL) { 789 free(from); 790 free(tmp); 791 return 0; 792 } 793 len = 0; 794 for (; *cmd && *cmd != delim; cmd++) { 795 if (*cmd == '\\' && cmd[1] == delim) 796 cmd++; 797 if (len >= size) { 798 char *nwhat; 799 nwhat = reallocarray(what, 800 size, 2); 801 if (nwhat == NULL) { 802 free(what); 803 free(tmp); 804 return 0; 805 } 806 size *= 2; 807 what = nwhat; 808 } 809 what[len++] = *cmd; 810 } 811 what[len] = '\0'; 812 from = what; 813 if (*what == '\0') { 814 free(what); 815 if (search) { 816 from = strdup(search); 817 if (from == NULL) { 818 free(tmp); 819 return 0; 820 } 821 } else { 822 from = NULL; 823 free(tmp); 824 return -1; 825 } 826 } 827 cmd++; /* shift after delim */ 828 if (!*cmd) 829 continue; 830 831 size = 16; 832 with = realloc(to, size); 833 if (with == NULL) { 834 free(to); 835 free(tmp); 836 return -1; 837 } 838 len = 0; 839 from_len = strlen(from); 840 for (; *cmd && *cmd != delim; cmd++) { 841 if (len + from_len + 1 >= size) { 842 char *nwith; 843 size += from_len + 1; 844 nwith = realloc(with, size); 845 if (nwith == NULL) { 846 free(with); 847 free(tmp); 848 return -1; 849 } 850 with = nwith; 851 } 852 if (*cmd == '&') { 853 /* safe */ 854 (void)strlcpy(&with[len], from, 855 size - len); 856 len += from_len; 857 continue; 858 } 859 if (*cmd == '\\' 860 && (*(cmd + 1) == delim 861 || *(cmd + 1) == '&')) 862 cmd++; 863 with[len++] = *cmd; 864 } 865 with[len] = '\0'; 866 to = with; 867 } 868 869 aptr = _rl_compat_sub(tmp, from, to, g_on); 870 if (aptr) { 871 free(tmp); 872 tmp = aptr; 873 } 874 g_on = 0; 875 } 876 } 877 *result = tmp; 878 return p_on? 2:1; 879 } 880 881 882 /* 883 * csh-style history expansion 884 */ 885 int 886 history_expand(char *str, char **output) 887 { 888 int ret = 0; 889 size_t idx, i, size; 890 char *tmp, *result; 891 892 if (h == NULL || e == NULL) 893 rl_initialize(); 894 895 if (history_expansion_char == 0) { 896 *output = strdup(str); 897 return 0; 898 } 899 900 *output = NULL; 901 if (str[0] == history_subst_char) { 902 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 903 size_t sz = 4 + strlen(str) + 1; 904 *output = malloc(sz); 905 if (*output == NULL) 906 return 0; 907 (*output)[0] = (*output)[1] = history_expansion_char; 908 (*output)[2] = ':'; 909 (*output)[3] = 's'; 910 (void)strlcpy((*output) + 4, str, sz - 4); 911 str = *output; 912 } else { 913 *output = strdup(str); 914 if (*output == NULL) 915 return 0; 916 } 917 918 #define ADD_STRING(what, len, fr) \ 919 { \ 920 if (idx + len + 1 > size) { \ 921 char *nresult = realloc(result, (size += len + 1));\ 922 if (nresult == NULL) { \ 923 free(*output); \ 924 if (/*CONSTCOND*/fr) \ 925 free(tmp); \ 926 return 0; \ 927 } \ 928 result = nresult; \ 929 } \ 930 (void)strncpy(&result[idx], what, len); \ 931 idx += len; \ 932 result[idx] = '\0'; \ 933 } 934 935 result = NULL; 936 size = idx = 0; 937 tmp = NULL; 938 for (i = 0; str[i];) { 939 int qchar, loop_again; 940 size_t len, start, j; 941 942 qchar = 0; 943 loop_again = 1; 944 start = j = i; 945 loop: 946 for (; str[j]; j++) { 947 if (str[j] == '\\' && 948 str[j + 1] == history_expansion_char) { 949 size_t sz = strlen(&str[j]) + 1; 950 (void)strlcpy(&str[j], &str[j + 1], sz); 951 continue; 952 } 953 if (!loop_again) { 954 if (isspace((unsigned char) str[j]) 955 || str[j] == qchar) 956 break; 957 } 958 if (str[j] == history_expansion_char 959 && !strchr(history_no_expand_chars, str[j + 1]) 960 && (!history_inhibit_expansion_function || 961 (*history_inhibit_expansion_function)(str, 962 (int)j) == 0)) 963 break; 964 } 965 966 if (str[j] && loop_again) { 967 i = j; 968 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 969 j++; 970 if (str[j] == history_expansion_char) 971 j++; 972 loop_again = 0; 973 goto loop; 974 } 975 len = i - start; 976 ADD_STRING(&str[start], len, 0); 977 978 if (str[i] == '\0' || str[i] != history_expansion_char) { 979 len = j - i; 980 ADD_STRING(&str[i], len, 0); 981 if (start == 0) 982 ret = 0; 983 else 984 ret = 1; 985 break; 986 } 987 ret = _history_expand_command (str, i, (j - i), &tmp); 988 if (ret > 0 && tmp) { 989 len = strlen(tmp); 990 ADD_STRING(tmp, len, 1); 991 } 992 if (tmp) { 993 free(tmp); 994 tmp = NULL; 995 } 996 i = j; 997 } 998 999 /* ret is 2 for "print only" option */ 1000 if (ret == 2) { 1001 add_history(result); 1002 #ifdef GDB_411_HACK 1003 /* gdb 4.11 has been shipped with readline, where */ 1004 /* history_expand() returned -1 when the line */ 1005 /* should not be executed; in readline 2.1+ */ 1006 /* it should return 2 in such a case */ 1007 ret = -1; 1008 #endif 1009 } 1010 free(*output); 1011 *output = result; 1012 1013 return ret; 1014 } 1015 1016 /* 1017 * Return a string consisting of arguments of "str" from "start" to "end". 1018 */ 1019 char * 1020 history_arg_extract(int start, int end, const char *str) 1021 { 1022 size_t i, len, max; 1023 char **arr, *result = NULL; 1024 1025 arr = history_tokenize(str); 1026 if (!arr) 1027 return NULL; 1028 if (arr && *arr == NULL) 1029 goto out; 1030 1031 for (max = 0; arr[max]; max++) 1032 continue; 1033 max--; 1034 1035 if (start == '$') 1036 start = (int)max; 1037 if (end == '$') 1038 end = (int)max; 1039 if (end < 0) 1040 end = (int)max + end + 1; 1041 if (start < 0) 1042 start = end; 1043 1044 if (start < 0 || end < 0 || (size_t)start > max || 1045 (size_t)end > max || start > end) 1046 goto out; 1047 1048 for (i = start, len = 0; i <= (size_t)end; i++) 1049 len += strlen(arr[i]) + 1; 1050 len++; 1051 max = len; 1052 result = malloc(len); 1053 if (result == NULL) 1054 goto out; 1055 1056 for (i = start, len = 0; i <= (size_t)end; i++) { 1057 (void)strlcpy(result + len, arr[i], max - len); 1058 len += strlen(arr[i]); 1059 if (i < (size_t)end) 1060 result[len++] = ' '; 1061 } 1062 result[len] = '\0'; 1063 1064 out: 1065 for (i = 0; arr[i]; i++) 1066 free(arr[i]); 1067 free(arr); 1068 1069 return result; 1070 } 1071 1072 /* 1073 * Parse the string into individual tokens, 1074 * similar to how shell would do it. 1075 */ 1076 char ** 1077 history_tokenize(const char *str) 1078 { 1079 int size = 1, idx = 0, i, start; 1080 size_t len; 1081 char **result = NULL, *temp, delim = '\0'; 1082 1083 for (i = 0; str[i];) { 1084 while (isspace((unsigned char) str[i])) 1085 i++; 1086 start = i; 1087 for (; str[i];) { 1088 if (str[i] == '\\') { 1089 if (str[i+1] != '\0') 1090 i++; 1091 } else if (str[i] == delim) 1092 delim = '\0'; 1093 else if (!delim && 1094 (isspace((unsigned char) str[i]) || 1095 strchr("()<>;&|$", str[i]))) 1096 break; 1097 else if (!delim && strchr("'`\"", str[i])) 1098 delim = str[i]; 1099 if (str[i]) 1100 i++; 1101 } 1102 1103 if (idx + 2 >= size) { 1104 char **nresult; 1105 nresult = reallocarray(result, size, 1106 2 * sizeof(char *)); 1107 if (nresult == NULL) { 1108 free(result); 1109 return NULL; 1110 } 1111 size *= 2; 1112 result = nresult; 1113 } 1114 len = i - start; 1115 temp = malloc(len + 1); 1116 if (temp == NULL) { 1117 for (i = 0; i < idx; i++) 1118 free(result[i]); 1119 free(result); 1120 return NULL; 1121 } 1122 (void)strncpy(temp, &str[start], len); 1123 temp[len] = '\0'; 1124 result[idx++] = temp; 1125 result[idx] = NULL; 1126 if (str[i]) 1127 i++; 1128 } 1129 return result; 1130 } 1131 1132 1133 /* 1134 * limit size of history record to ``max'' events 1135 */ 1136 void 1137 stifle_history(int max) 1138 { 1139 HistEvent ev; 1140 HIST_ENTRY *he; 1141 int i, len; 1142 1143 if (h == NULL || e == NULL) 1144 rl_initialize(); 1145 1146 len = history_length; 1147 if (history(h, &ev, H_SETSIZE, max) == 0) { 1148 max_input_history = max; 1149 if (max < len) 1150 history_base += len - max; 1151 for (i = 0; i < len - max; i++) { 1152 he = remove_history(0); 1153 free(he->data); 1154 free((void *)he->line); 1155 free(he); 1156 } 1157 } 1158 } 1159 1160 1161 /* 1162 * "unlimit" size of history - set the limit to maximum allowed int value 1163 */ 1164 int 1165 unstifle_history(void) 1166 { 1167 HistEvent ev; 1168 int omax; 1169 1170 history(h, &ev, H_SETSIZE, INT_MAX); 1171 omax = max_input_history; 1172 max_input_history = INT_MAX; 1173 return omax; /* some value _must_ be returned */ 1174 } 1175 1176 1177 int 1178 history_is_stifled(void) 1179 { 1180 1181 /* cannot return true answer */ 1182 return max_input_history != INT_MAX; 1183 } 1184 1185 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1186 1187 int 1188 history_truncate_file (const char *filename, int nlines) 1189 { 1190 int ret = 0; 1191 FILE *fp, *tp; 1192 char template[sizeof(_history_tmp_template)]; 1193 char buf[4096]; 1194 int fd; 1195 char *cp; 1196 off_t off; 1197 int count = 0; 1198 ssize_t left = 0; 1199 1200 if (filename == NULL && (filename = _default_history_file()) == NULL) 1201 return errno; 1202 if ((fp = fopen(filename, "r+")) == NULL) 1203 return errno; 1204 strlcpy(template, _history_tmp_template, sizeof(template)); 1205 if ((fd = mkstemp(template)) == -1) { 1206 ret = errno; 1207 goto out1; 1208 } 1209 1210 if ((tp = fdopen(fd, "r+")) == NULL) { 1211 close(fd); 1212 ret = errno; 1213 goto out2; 1214 } 1215 1216 for(;;) { 1217 if (fread(buf, sizeof(buf), 1, fp) != 1) { 1218 if (ferror(fp)) { 1219 ret = errno; 1220 break; 1221 } 1222 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1223 (off_t)-1) { 1224 ret = errno; 1225 break; 1226 } 1227 left = fread(buf, 1, sizeof(buf), fp); 1228 if (ferror(fp)) { 1229 ret = errno; 1230 break; 1231 } 1232 if (left == 0) { 1233 count--; 1234 left = sizeof(buf); 1235 } else if (fwrite(buf, (size_t)left, 1, tp) != 1) { 1236 ret = errno; 1237 break; 1238 } 1239 fflush(tp); 1240 break; 1241 } 1242 if (fwrite(buf, sizeof(buf), 1, tp) != 1) { 1243 ret = errno; 1244 break; 1245 } 1246 count++; 1247 } 1248 if (ret) 1249 goto out3; 1250 cp = buf + left - 1; 1251 if(*cp != '\n') 1252 cp++; 1253 for(;;) { 1254 while (--cp >= buf) { 1255 if (*cp == '\n') { 1256 if (--nlines == 0) { 1257 if (++cp >= buf + sizeof(buf)) { 1258 count++; 1259 cp = buf; 1260 } 1261 break; 1262 } 1263 } 1264 } 1265 if (nlines <= 0 || count == 0) 1266 break; 1267 count--; 1268 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) == -1) { 1269 ret = errno; 1270 break; 1271 } 1272 if (fread(buf, sizeof(buf), 1, tp) != 1) { 1273 if (ferror(tp)) { 1274 ret = errno; 1275 break; 1276 } 1277 ret = EAGAIN; 1278 break; 1279 } 1280 cp = buf + sizeof(buf); 1281 } 1282 1283 if (ret || nlines > 0) 1284 goto out3; 1285 1286 if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) { 1287 ret = errno; 1288 goto out3; 1289 } 1290 1291 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1292 (off_t)-1) { 1293 ret = errno; 1294 goto out3; 1295 } 1296 1297 for(;;) { 1298 if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) { 1299 if (ferror(fp)) 1300 ret = errno; 1301 break; 1302 } 1303 if (fwrite(buf, (size_t)left, 1, fp) != 1) { 1304 ret = errno; 1305 break; 1306 } 1307 } 1308 fflush(fp); 1309 if((off = ftello(fp)) > 0) 1310 (void)ftruncate(fileno(fp), off); 1311 out3: 1312 fclose(tp); 1313 out2: 1314 unlink(template); 1315 out1: 1316 fclose(fp); 1317 1318 return ret; 1319 } 1320 1321 1322 /* 1323 * read history from a file given 1324 */ 1325 int 1326 read_history(const char *filename) 1327 { 1328 HistEvent ev; 1329 1330 if (h == NULL || e == NULL) 1331 rl_initialize(); 1332 if (filename == NULL && (filename = _default_history_file()) == NULL) 1333 return errno; 1334 return history(h, &ev, H_LOAD, filename) == -1 ? 1335 (errno ? errno : EINVAL) : 0; 1336 } 1337 1338 1339 /* 1340 * write history to a file given 1341 */ 1342 int 1343 write_history(const char *filename) 1344 { 1345 HistEvent ev; 1346 1347 if (h == NULL || e == NULL) 1348 rl_initialize(); 1349 if (filename == NULL && (filename = _default_history_file()) == NULL) 1350 return errno; 1351 return history(h, &ev, H_SAVE, filename) == -1 ? 1352 (errno ? errno : EINVAL) : 0; 1353 } 1354 1355 1356 /* 1357 * returns history ``num''th event 1358 * 1359 * returned pointer points to static variable 1360 */ 1361 HIST_ENTRY * 1362 history_get(int num) 1363 { 1364 static HIST_ENTRY she; 1365 HistEvent ev; 1366 int curr_num; 1367 1368 if (h == NULL || e == NULL) 1369 rl_initialize(); 1370 1371 if (num < history_base) 1372 return NULL; 1373 1374 /* save current position */ 1375 if (history(h, &ev, H_CURR) != 0) 1376 return NULL; 1377 curr_num = ev.num; 1378 1379 /* 1380 * use H_DELDATA to set to nth history (without delete) by passing 1381 * (void **)-1 -- as in history_set_pos 1382 */ 1383 if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) 1384 goto out; 1385 1386 /* get current entry */ 1387 if (history(h, &ev, H_CURR) != 0) 1388 goto out; 1389 if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) 1390 goto out; 1391 she.line = ev.str; 1392 1393 /* restore pointer to where it was */ 1394 (void)history(h, &ev, H_SET, curr_num); 1395 1396 return &she; 1397 1398 out: 1399 /* restore pointer to where it was */ 1400 (void)history(h, &ev, H_SET, curr_num); 1401 return NULL; 1402 } 1403 1404 1405 /* 1406 * add the line to history table 1407 */ 1408 int 1409 add_history(const char *line) 1410 { 1411 HistEvent ev; 1412 1413 if (h == NULL || e == NULL) 1414 rl_initialize(); 1415 1416 (void)history(h, &ev, H_ENTER, line); 1417 if (history(h, &ev, H_GETSIZE) == 0) 1418 history_length = ev.num; 1419 current_history_valid = 1; 1420 1421 return !(history_length > 0); /* return 0 if all is okay */ 1422 } 1423 1424 1425 /* 1426 * remove the specified entry from the history list and return it. 1427 */ 1428 HIST_ENTRY * 1429 remove_history(int num) 1430 { 1431 HIST_ENTRY *he; 1432 HistEvent ev; 1433 1434 if (h == NULL || e == NULL) 1435 rl_initialize(); 1436 1437 if ((he = malloc(sizeof(*he))) == NULL) 1438 return NULL; 1439 1440 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1441 free(he); 1442 return NULL; 1443 } 1444 1445 he->line = ev.str; 1446 if (history(h, &ev, H_GETSIZE) == 0) 1447 history_length = ev.num; 1448 1449 return he; 1450 } 1451 1452 1453 /* 1454 * replace the line and data of the num-th entry 1455 */ 1456 HIST_ENTRY * 1457 replace_history_entry(int num, const char *line, histdata_t data) 1458 { 1459 HIST_ENTRY *he; 1460 HistEvent ev; 1461 int curr_num; 1462 1463 if (h == NULL || e == NULL) 1464 rl_initialize(); 1465 1466 /* save current position */ 1467 if (history(h, &ev, H_CURR) != 0) 1468 return NULL; 1469 curr_num = ev.num; 1470 1471 /* start from the oldest */ 1472 if (history(h, &ev, H_LAST) != 0) 1473 return NULL; /* error */ 1474 1475 if ((he = malloc(sizeof(*he))) == NULL) 1476 return NULL; 1477 1478 /* look forwards for event matching specified offset */ 1479 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1480 goto out; 1481 1482 he->line = strdup(ev.str); 1483 if (he->line == NULL) 1484 goto out; 1485 1486 if (history(h, &ev, H_REPLACE, line, data)) 1487 goto out; 1488 1489 /* restore pointer to where it was */ 1490 if (history(h, &ev, H_SET, curr_num)) 1491 goto out; 1492 1493 return he; 1494 out: 1495 free(he); 1496 return NULL; 1497 } 1498 1499 /* 1500 * clear the history list - delete all entries 1501 */ 1502 void 1503 clear_history(void) 1504 { 1505 HistEvent ev; 1506 1507 (void)history(h, &ev, H_CLEAR); 1508 history_length = 0; 1509 current_history_valid = 1; 1510 } 1511 1512 1513 /* 1514 * returns offset of the current history event 1515 */ 1516 int 1517 where_history(void) 1518 { 1519 HistEvent ev; 1520 int curr_num, off; 1521 1522 if (history(h, &ev, H_CURR) != 0) 1523 return 0; 1524 curr_num = ev.num; 1525 1526 /* start from the oldest */ 1527 (void)history(h, &ev, H_LAST); 1528 1529 /* position is zero-based */ 1530 off = 0; 1531 while (ev.num != curr_num && history(h, &ev, H_PREV) == 0) 1532 off++; 1533 1534 return off; 1535 } 1536 1537 1538 /* 1539 * returns current history event or NULL if there is no such event 1540 */ 1541 HIST_ENTRY * 1542 current_history(void) 1543 { 1544 1545 return current_history_valid ? _move_history(H_CURR) : NULL; 1546 } 1547 1548 1549 /* 1550 * returns total number of bytes history events' data are using 1551 */ 1552 int 1553 history_total_bytes(void) 1554 { 1555 HistEvent ev; 1556 int curr_num; 1557 size_t size; 1558 1559 if (history(h, &ev, H_CURR) != 0) 1560 return -1; 1561 curr_num = ev.num; 1562 1563 (void)history(h, &ev, H_FIRST); 1564 size = 0; 1565 do 1566 size += strlen(ev.str) * sizeof(*ev.str); 1567 while (history(h, &ev, H_NEXT) == 0); 1568 1569 /* get to the same position as before */ 1570 history(h, &ev, H_PREV_EVENT, curr_num); 1571 1572 return (int)size; 1573 } 1574 1575 1576 /* 1577 * sets the position in the history list to ``pos'' 1578 */ 1579 int 1580 history_set_pos(int pos) 1581 { 1582 HistEvent ev; 1583 int curr_num; 1584 1585 if (pos >= history_length || pos < 0) 1586 return 0; 1587 1588 (void)history(h, &ev, H_CURR); 1589 curr_num = ev.num; 1590 current_history_valid = 1; 1591 1592 /* 1593 * use H_DELDATA to set to nth history (without delete) by passing 1594 * (void **)-1 1595 */ 1596 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1597 (void)history(h, &ev, H_SET, curr_num); 1598 return 0; 1599 } 1600 return 1; 1601 } 1602 1603 1604 /* 1605 * returns previous event in history and shifts pointer accordingly 1606 * Note that readline and editline define directions in opposite ways. 1607 */ 1608 HIST_ENTRY * 1609 previous_history(void) 1610 { 1611 1612 if (current_history_valid == 0) { 1613 current_history_valid = 1; 1614 return _move_history(H_CURR); 1615 } 1616 return _move_history(H_NEXT); 1617 } 1618 1619 1620 /* 1621 * returns next event in history and shifts pointer accordingly 1622 */ 1623 HIST_ENTRY * 1624 next_history(void) 1625 { 1626 HIST_ENTRY *he; 1627 1628 he = _move_history(H_PREV); 1629 if (he == NULL) 1630 current_history_valid = 0; 1631 return he; 1632 } 1633 1634 1635 /* 1636 * searches for first history event containing the str 1637 */ 1638 int 1639 history_search(const char *str, int direction) 1640 { 1641 HistEvent ev; 1642 const char *strp; 1643 int curr_num; 1644 1645 if (history(h, &ev, H_CURR) != 0) 1646 return -1; 1647 curr_num = ev.num; 1648 1649 for (;;) { 1650 if ((strp = strstr(ev.str, str)) != NULL) 1651 return (int)(strp - ev.str); 1652 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1653 break; 1654 } 1655 (void)history(h, &ev, H_SET, curr_num); 1656 return -1; 1657 } 1658 1659 1660 /* 1661 * searches for first history event beginning with str 1662 */ 1663 int 1664 history_search_prefix(const char *str, int direction) 1665 { 1666 HistEvent ev; 1667 1668 return (history(h, &ev, direction < 0 ? 1669 H_PREV_STR : H_NEXT_STR, str)); 1670 } 1671 1672 1673 /* 1674 * search for event in history containing str, starting at offset 1675 * abs(pos); continue backward, if pos<0, forward otherwise 1676 */ 1677 /* ARGSUSED */ 1678 int 1679 history_search_pos(const char *str, 1680 int direction __attribute__((__unused__)), int pos) 1681 { 1682 HistEvent ev; 1683 int curr_num, off; 1684 1685 off = (pos > 0) ? pos : -pos; 1686 pos = (pos > 0) ? 1 : -1; 1687 1688 if (history(h, &ev, H_CURR) != 0) 1689 return -1; 1690 curr_num = ev.num; 1691 1692 if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0) 1693 return -1; 1694 1695 for (;;) { 1696 if (strstr(ev.str, str)) 1697 return off; 1698 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1699 break; 1700 } 1701 1702 /* set "current" pointer back to previous state */ 1703 (void)history(h, &ev, 1704 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1705 1706 return -1; 1707 } 1708 1709 1710 /********************************/ 1711 /* completion functions */ 1712 1713 char * 1714 tilde_expand(char *name) 1715 { 1716 return fn_tilde_expand(name); 1717 } 1718 1719 char * 1720 filename_completion_function(const char *name, int state) 1721 { 1722 return fn_filename_completion_function(name, state); 1723 } 1724 1725 /* 1726 * a completion generator for usernames; returns _first_ username 1727 * which starts with supplied text 1728 * text contains a partial username preceded by random character 1729 * (usually '~'); state is ignored 1730 * it's the caller's responsibility to free the returned value 1731 */ 1732 char * 1733 username_completion_function(const char *text, int state) 1734 { 1735 struct passwd *pwd; 1736 1737 if (text[0] == '\0') 1738 return NULL; 1739 1740 if (*text == '~') 1741 text++; 1742 1743 if (state == 0) 1744 setpwent(); 1745 1746 while ((pwd = getpwent()) != NULL && text[0] == pwd->pw_name[0] 1747 && strcmp(text, pwd->pw_name) == 0); 1748 1749 if (pwd == NULL) { 1750 endpwent(); 1751 return NULL; 1752 } 1753 return strdup(pwd->pw_name); 1754 } 1755 1756 1757 /* 1758 * el-compatible wrapper to send TSTP on ^Z 1759 */ 1760 /* ARGSUSED */ 1761 static unsigned char 1762 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1763 { 1764 (void)kill(0, SIGTSTP); 1765 return CC_NORM; 1766 } 1767 1768 /* 1769 * Display list of strings in columnar format on readline's output stream. 1770 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1771 * 'max' is maximum length of string in 'matches'. 1772 */ 1773 void 1774 rl_display_match_list(char **matches, int len, int max) 1775 { 1776 1777 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1778 } 1779 1780 static const char * 1781 /*ARGSUSED*/ 1782 _rl_completion_append_character_function(const char *dummy 1783 __attribute__((__unused__))) 1784 { 1785 static char buf[2]; 1786 buf[0] = rl_completion_append_character; 1787 buf[1] = '\0'; 1788 return buf; 1789 } 1790 1791 1792 /* 1793 * complete word at current point 1794 */ 1795 /* ARGSUSED */ 1796 int 1797 rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1798 { 1799 static ct_buffer_t wbreak_conv, sprefix_conv; 1800 1801 if (h == NULL || e == NULL) 1802 rl_initialize(); 1803 1804 if (rl_inhibit_completion) { 1805 char arr[2]; 1806 arr[0] = (char)invoking_key; 1807 arr[1] = '\0'; 1808 el_insertstr(e, arr); 1809 return CC_REFRESH; 1810 } 1811 1812 /* Just look at how many global variables modify this operation! */ 1813 return fn_complete(e, 1814 (CPFunction *)rl_completion_entry_function, 1815 rl_attempted_completion_function, 1816 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1817 ct_decode_string(rl_special_prefixes, &sprefix_conv), 1818 _rl_completion_append_character_function, 1819 (size_t)rl_completion_query_items, 1820 &rl_completion_type, &rl_attempted_completion_over, 1821 &rl_point, &rl_end); 1822 1823 1824 } 1825 1826 1827 /* ARGSUSED */ 1828 static unsigned char 1829 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1830 { 1831 return (unsigned char)rl_complete(0, ch); 1832 } 1833 1834 /* 1835 * misc other functions 1836 */ 1837 1838 /* 1839 * bind key c to readline-type function func 1840 */ 1841 int 1842 rl_bind_key(int c, rl_command_func_t *func) 1843 { 1844 int retval = -1; 1845 1846 if (h == NULL || e == NULL) 1847 rl_initialize(); 1848 1849 if (func == rl_insert) { 1850 /* XXX notice there is no range checking of ``c'' */ 1851 e->el_map.key[c] = ED_INSERT; 1852 retval = 0; 1853 } 1854 return retval; 1855 } 1856 1857 1858 /* 1859 * read one key from input - handles chars pushed back 1860 * to input stream also 1861 */ 1862 int 1863 rl_read_key(void) 1864 { 1865 char fooarr[2 * sizeof(int)]; 1866 1867 if (e == NULL || h == NULL) 1868 rl_initialize(); 1869 1870 return el_getc(e, fooarr); 1871 } 1872 1873 1874 /* 1875 * reset the terminal 1876 */ 1877 /* ARGSUSED */ 1878 void 1879 rl_reset_terminal(const char *p __attribute__((__unused__))) 1880 { 1881 1882 if (h == NULL || e == NULL) 1883 rl_initialize(); 1884 el_reset(e); 1885 } 1886 1887 1888 /* 1889 * insert character ``c'' back into input stream, ``count'' times 1890 */ 1891 int 1892 rl_insert(int count, int c) 1893 { 1894 char arr[2]; 1895 1896 if (h == NULL || e == NULL) 1897 rl_initialize(); 1898 1899 /* XXX - int -> char conversion can lose on multichars */ 1900 arr[0] = c; 1901 arr[1] = '\0'; 1902 1903 for (; count > 0; count--) 1904 el_push(e, arr); 1905 1906 return 0; 1907 } 1908 1909 int 1910 rl_insert_text(const char *text) 1911 { 1912 if (!text || *text == 0) 1913 return 0; 1914 1915 if (h == NULL || e == NULL) 1916 rl_initialize(); 1917 1918 if (el_insertstr(e, text) < 0) 1919 return 0; 1920 return (int)strlen(text); 1921 } 1922 1923 /*ARGSUSED*/ 1924 int 1925 rl_newline(int count, int c) 1926 { 1927 /* 1928 * Readline-4.0 appears to ignore the args. 1929 */ 1930 return rl_insert(1, '\n'); 1931 } 1932 1933 /*ARGSUSED*/ 1934 static unsigned char 1935 rl_bind_wrapper(EditLine *el, unsigned char c) 1936 { 1937 if (map[c] == NULL) 1938 return CC_ERROR; 1939 1940 _rl_update_pos(); 1941 1942 (*map[c])(NULL, c); 1943 1944 /* If rl_done was set by the above call, deal with it here */ 1945 if (rl_done) 1946 return CC_EOF; 1947 1948 return CC_NORM; 1949 } 1950 1951 int 1952 rl_add_defun(const char *name, Function *fun, int c) 1953 { 1954 char dest[8]; 1955 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1956 return -1; 1957 map[(unsigned char)c] = fun; 1958 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1959 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1960 el_set(e, EL_BIND, dest, name, NULL); 1961 return 0; 1962 } 1963 1964 void 1965 rl_callback_read_char() 1966 { 1967 int count = 0, done = 0; 1968 const char *buf = el_gets(e, &count); 1969 char *wbuf; 1970 1971 if (buf == NULL || count-- <= 0) 1972 return; 1973 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1974 done = 1; 1975 if (buf[count] == '\n' || buf[count] == '\r') 1976 done = 2; 1977 1978 if (done && rl_linefunc != NULL) { 1979 el_set(e, EL_UNBUFFERED, 0); 1980 if (done == 2) { 1981 if ((wbuf = strdup(buf)) != NULL) 1982 wbuf[count] = '\0'; 1983 } else 1984 wbuf = NULL; 1985 (*(void (*)(const char *))rl_linefunc)(wbuf); 1986 //el_set(e, EL_UNBUFFERED, 1); 1987 } 1988 } 1989 1990 void 1991 rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1992 { 1993 if (e == NULL) { 1994 rl_initialize(); 1995 } 1996 (void)rl_set_prompt(prompt); 1997 rl_linefunc = linefunc; 1998 el_set(e, EL_UNBUFFERED, 1); 1999 } 2000 2001 void 2002 rl_callback_handler_remove(void) 2003 { 2004 el_set(e, EL_UNBUFFERED, 0); 2005 rl_linefunc = NULL; 2006 } 2007 2008 void 2009 rl_redisplay(void) 2010 { 2011 char a[2]; 2012 a[0] = e->el_tty.t_c[TS_IO][C_REPRINT]; 2013 a[1] = '\0'; 2014 el_push(e, a); 2015 } 2016 2017 int 2018 rl_get_previous_history(int count, int key) 2019 { 2020 char a[2]; 2021 a[0] = key; 2022 a[1] = '\0'; 2023 while (count--) 2024 el_push(e, a); 2025 return 0; 2026 } 2027 2028 void 2029 /*ARGSUSED*/ 2030 rl_prep_terminal(int meta_flag) 2031 { 2032 el_set(e, EL_PREP_TERM, 1); 2033 } 2034 2035 void 2036 rl_deprep_terminal(void) 2037 { 2038 el_set(e, EL_PREP_TERM, 0); 2039 } 2040 2041 int 2042 rl_read_init_file(const char *s) 2043 { 2044 return el_source(e, s); 2045 } 2046 2047 int 2048 rl_parse_and_bind(const char *line) 2049 { 2050 const char **argv; 2051 int argc; 2052 Tokenizer *tok; 2053 2054 tok = tok_init(NULL); 2055 tok_str(tok, line, &argc, &argv); 2056 argc = el_parse(e, argc, argv); 2057 tok_end(tok); 2058 return argc ? 1 : 0; 2059 } 2060 2061 int 2062 rl_variable_bind(const char *var, const char *value) 2063 { 2064 /* 2065 * The proper return value is undocument, but this is what the 2066 * readline source seems to do. 2067 */ 2068 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2069 } 2070 2071 void 2072 rl_stuff_char(int c) 2073 { 2074 char buf[2]; 2075 2076 buf[0] = c; 2077 buf[1] = '\0'; 2078 el_insertstr(e, buf); 2079 } 2080 2081 static int 2082 _rl_event_read_char(EditLine *el, wchar_t *wc) 2083 { 2084 char ch; 2085 int n; 2086 ssize_t num_read = 0; 2087 2088 ch = '\0'; 2089 *wc = L'\0'; 2090 while (rl_event_hook) { 2091 2092 (*rl_event_hook)(); 2093 2094 #if defined(FIONREAD) 2095 if (ioctl(el->el_infd, FIONREAD, &n) == -1) 2096 return -1; 2097 if (n) 2098 num_read = read(el->el_infd, &ch, 1); 2099 else 2100 num_read = 0; 2101 #elif defined(F_SETFL) && defined(O_NDELAY) 2102 if ((n = fcntl(el->el_infd, F_GETFL)) == -1) 2103 return -1; 2104 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) == -1) 2105 return -1; 2106 num_read = read(el->el_infd, &ch, 1); 2107 if (fcntl(el->el_infd, F_SETFL, n)) 2108 return -1; 2109 #else 2110 /* not non-blocking, but what you gonna do? */ 2111 num_read = read(el->el_infd, &ch, 1); 2112 return -1; 2113 #endif 2114 2115 if (num_read == -1 && errno == EAGAIN) 2116 continue; 2117 if (num_read == 0) 2118 continue; 2119 break; 2120 } 2121 if (!rl_event_hook) 2122 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2123 *wc = (wchar_t)ch; 2124 return (int)num_read; 2125 } 2126 2127 static void 2128 _rl_update_pos(void) 2129 { 2130 const LineInfo *li = el_line(e); 2131 2132 rl_point = (int)(li->cursor - li->buffer); 2133 rl_end = (int)(li->lastchar - li->buffer); 2134 } 2135 2136 void 2137 rl_get_screen_size(int *rows, int *cols) 2138 { 2139 if (rows) 2140 el_get(e, EL_GETTC, "li", rows); 2141 if (cols) 2142 el_get(e, EL_GETTC, "co", cols); 2143 } 2144 2145 void 2146 rl_set_screen_size(int rows, int cols) 2147 { 2148 char buf[64]; 2149 (void)snprintf(buf, sizeof(buf), "%d", rows); 2150 el_set(e, EL_SETTC, "li", buf, NULL); 2151 (void)snprintf(buf, sizeof(buf), "%d", cols); 2152 el_set(e, EL_SETTC, "co", buf, NULL); 2153 } 2154 2155 char ** 2156 rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2157 { 2158 size_t len, max, i, j, min; 2159 char **list, *match, *a, *b; 2160 2161 len = 1; 2162 max = 10; 2163 if ((list = reallocarray(NULL, max, sizeof(*list))) == NULL) 2164 return NULL; 2165 2166 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2167 list[len++] = match; 2168 if (len == max) { 2169 char **nl; 2170 max += 10; 2171 if ((nl = reallocarray(list, max, sizeof(*nl))) == NULL) 2172 goto out; 2173 list = nl; 2174 } 2175 } 2176 if (len == 1) 2177 goto out; 2178 list[len] = NULL; 2179 if (len == 2) { 2180 if ((list[0] = strdup(list[1])) == NULL) 2181 goto out; 2182 return list; 2183 } 2184 qsort(&list[1], len - 1, sizeof(*list), 2185 (int (*)(const void *, const void *)) strcmp); 2186 min = SIZE_MAX; 2187 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2188 b = list[i + 1]; 2189 for (j = 0; a[j] && a[j] == b[j]; j++) 2190 continue; 2191 if (min > j) 2192 min = j; 2193 } 2194 if (min == 0 && *str) { 2195 if ((list[0] = strdup(str)) == NULL) 2196 goto out; 2197 } else { 2198 if ((list[0] = malloc(min + 1)) == NULL) 2199 goto out; 2200 (void)memcpy(list[0], list[1], min); 2201 list[0][min] = '\0'; 2202 } 2203 return list; 2204 2205 out: 2206 free(list); 2207 return NULL; 2208 } 2209 2210 char * 2211 rl_filename_completion_function (const char *text, int state) 2212 { 2213 return fn_filename_completion_function(text, state); 2214 } 2215 2216 void 2217 rl_forced_update_display(void) 2218 { 2219 el_set(e, EL_REFRESH); 2220 } 2221 2222 int 2223 _rl_abort_internal(void) 2224 { 2225 el_beep(e); 2226 longjmp(topbuf, 1); 2227 /*NOTREACHED*/ 2228 } 2229 2230 int 2231 _rl_qsort_string_compare(char **s1, char **s2) 2232 { 2233 return strcoll(*s1, *s2); 2234 } 2235 2236 HISTORY_STATE * 2237 history_get_history_state(void) 2238 { 2239 HISTORY_STATE *hs; 2240 2241 if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL) 2242 return NULL; 2243 hs->length = history_length; 2244 return hs; 2245 } 2246 2247 int 2248 /*ARGSUSED*/ 2249 rl_kill_text(int from, int to) 2250 { 2251 return 0; 2252 } 2253 2254 Keymap 2255 rl_make_bare_keymap(void) 2256 { 2257 return NULL; 2258 } 2259 2260 Keymap 2261 rl_get_keymap(void) 2262 { 2263 return NULL; 2264 } 2265 2266 void 2267 /*ARGSUSED*/ 2268 rl_set_keymap(Keymap k) 2269 { 2270 } 2271 2272 int 2273 /*ARGSUSED*/ 2274 rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k) 2275 { 2276 return 0; 2277 } 2278 2279 int 2280 /*ARGSUSED*/ 2281 rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k) 2282 { 2283 return 0; 2284 } 2285 2286 /* unsupported, but needed by python */ 2287 void 2288 rl_cleanup_after_signal(void) 2289 { 2290 } 2291 2292 int 2293 rl_on_new_line(void) 2294 { 2295 return 0; 2296 } 2297 2298 int 2299 /*ARGSUSED*/ 2300 rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) 2301 { 2302 return 0; 2303 } 2304