1/* $NetBSD: readline.c,v 1.106 2012/10/12 23:35:02 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 1.106 2012/10/12 23:35:02 christos Exp $"); 35#endif /* not lint && not SCCSID */ 36 37#include <sys/types.h> 38#include <sys/stat.h> 39#include <stdio.h> 40#include <dirent.h> 41#include <string.h> 42#include <pwd.h> 43#include <ctype.h> 44#include <stdlib.h> 45#include <unistd.h> 46#include <limits.h> 47#include <errno.h> 48#include <fcntl.h> 49#include <setjmp.h> 50#include <vis.h> 51 52#include "editline/readline.h" 53#include "el.h" 54#include "fcns.h" /* for EL_NUM_FCNS */ 55#include "histedit.h" 56#include "filecomplete.h" 57 58#if !defined(SIZE_T_MAX) 59# define SIZE_T_MAX (size_t)(-1) 60#endif 61 62void rl_prep_terminal(int); 63void rl_deprep_terminal(void); 64 65/* for rl_complete() */ 66#define TAB '\r' 67 68/* see comment at the #ifdef for sense of this */ 69/* #define GDB_411_HACK */ 70 71/* readline compatibility stuff - look at readline sources/documentation */ 72/* to see what these variables mean */ 73const char *rl_library_version = "EditLine wrapper"; 74int rl_readline_version = RL_READLINE_VERSION; 75static char empty[] = { '\0' }; 76static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' }; 77static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$', 78 '>', '<', '=', ';', '|', '&', '{', '(', '\0' }; 79char *rl_readline_name = empty; 80FILE *rl_instream = NULL; 81FILE *rl_outstream = NULL; 82int rl_point = 0; 83int rl_end = 0; 84char *rl_line_buffer = NULL; 85VCPFunction *rl_linefunc = NULL; 86int rl_done = 0; 87VFunction *rl_event_hook = NULL; 88KEYMAP_ENTRY_ARRAY emacs_standard_keymap, 89 emacs_meta_keymap, 90 emacs_ctlx_keymap; 91 92int history_base = 1; /* probably never subject to change */ 93int history_length = 0; 94int max_input_history = 0; 95char history_expansion_char = '!'; 96char history_subst_char = '^'; 97char *history_no_expand_chars = expand_chars; 98Function *history_inhibit_expansion_function = NULL; 99char *history_arg_extract(int start, int end, const char *str); 100 101int rl_inhibit_completion = 0; 102int rl_attempted_completion_over = 0; 103char *rl_basic_word_break_characters = break_chars; 104char *rl_completer_word_break_characters = NULL; 105char *rl_completer_quote_characters = NULL; 106Function *rl_completion_entry_function = NULL; 107char *(*rl_completion_word_break_hook)(void) = NULL; 108CPPFunction *rl_attempted_completion_function = NULL; 109Function *rl_pre_input_hook = NULL; 110Function *rl_startup1_hook = NULL; 111int (*rl_getc_function)(FILE *) = NULL; 112char *rl_terminal_name = NULL; 113int rl_already_prompted = 0; 114int rl_filename_completion_desired = 0; 115int rl_ignore_completion_duplicates = 0; 116int rl_catch_signals = 1; 117int readline_echoing_p = 1; 118int _rl_print_completions_horizontally = 0; 119VFunction *rl_redisplay_function = NULL; 120Function *rl_startup_hook = NULL; 121VFunction *rl_completion_display_matches_hook = NULL; 122VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; 123VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; 124KEYMAP_ENTRY_ARRAY emacs_meta_keymap; 125 126/* 127 * The current prompt string. 128 */ 129char *rl_prompt = NULL; 130/* 131 * This is set to character indicating type of completion being done by 132 * rl_complete_internal(); this is available for application completion 133 * functions. 134 */ 135int rl_completion_type = 0; 136 137/* 138 * If more than this number of items results from query for possible 139 * completions, we ask user if they are sure to really display the list. 140 */ 141int rl_completion_query_items = 100; 142 143/* 144 * List of characters which are word break characters, but should be left 145 * in the parsed text when it is passed to the completion function. 146 * Shell uses this to help determine what kind of completing to do. 147 */ 148char *rl_special_prefixes = NULL; 149 150/* 151 * This is the character appended to the completed words if at the end of 152 * the line. Default is ' ' (a space). 153 */ 154int rl_completion_append_character = ' '; 155 156/* stuff below is used internally by libedit for readline emulation */ 157 158static History *h = NULL; 159static EditLine *e = NULL; 160static Function *map[256]; 161static jmp_buf topbuf; 162 163/* internal functions */ 164static unsigned char _el_rl_complete(EditLine *, int); 165static unsigned char _el_rl_tstp(EditLine *, int); 166static char *_get_prompt(EditLine *); 167static int _getc_function(EditLine *, char *); 168static HIST_ENTRY *_move_history(int); 169static int _history_expand_command(const char *, size_t, size_t, 170 char **); 171static char *_rl_compat_sub(const char *, const char *, 172 const char *, int); 173static int _rl_event_read_char(EditLine *, char *); 174static void _rl_update_pos(void); 175 176 177/* ARGSUSED */ 178static char * 179_get_prompt(EditLine *el __attribute__((__unused__))) 180{ 181 rl_already_prompted = 1; 182 return rl_prompt; 183} 184 185 186/* 187 * generic function for moving around history 188 */ 189static HIST_ENTRY * 190_move_history(int op) 191{ 192 HistEvent ev; 193 static HIST_ENTRY rl_he; 194 195 if (history(h, &ev, op) != 0) 196 return NULL; 197 198 rl_he.line = ev.str; 199 rl_he.data = NULL; 200 201 return &rl_he; 202} 203 204 205/* 206 * read one key from user defined input function 207 */ 208static int 209/*ARGSUSED*/ 210_getc_function(EditLine *el __attribute__((__unused__)), char *c) 211{ 212 int i; 213 214 i = (*rl_getc_function)(NULL); 215 if (i == -1) 216 return 0; 217 *c = (char)i; 218 return 1; 219} 220 221static void 222_resize_fun(EditLine *el, void *a) 223{ 224 const LineInfo *li; 225 char **ap = a; 226 227 li = el_line(el); 228 /* a cheesy way to get rid of const cast. */ 229 *ap = memchr(li->buffer, *li->buffer, (size_t)1); 230} 231 232static const char * 233_default_history_file(void) 234{ 235 struct passwd *p; 236 static char path[PATH_MAX]; 237 238 if (*path) 239 return path; 240 if ((p = getpwuid(getuid())) == NULL) 241 return NULL; 242 (void)snprintf(path, sizeof(path), "%s/.history", p->pw_dir); 243 return path; 244} 245 246/* 247 * READLINE compatibility stuff 248 */ 249 250/* 251 * Set the prompt 252 */ 253int 254rl_set_prompt(const char *prompt) 255{ 256 char *p; 257 258 if (!prompt) 259 prompt = ""; 260 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 261 return 0; 262 if (rl_prompt) 263 el_free(rl_prompt); 264 rl_prompt = strdup(prompt); 265 if (rl_prompt == NULL) 266 return -1; 267 268 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) 269 *p = RL_PROMPT_START_IGNORE; 270 271 return 0; 272} 273 274/* 275 * initialize rl compat stuff 276 */ 277int 278rl_initialize(void) 279{ 280 HistEvent ev; 281 int editmode = 1; 282 struct termios t; 283 284 if (e != NULL) 285 el_end(e); 286 if (h != NULL) 287 history_end(h); 288 289 if (!rl_instream) 290 rl_instream = stdin; 291 if (!rl_outstream) 292 rl_outstream = stdout; 293 294 /* 295 * See if we don't really want to run the editor 296 */ 297 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0) 298 editmode = 0; 299 300 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr); 301 302 if (!editmode) 303 el_set(e, EL_EDITMODE, 0); 304 305 h = history_init(); 306 if (!e || !h) 307 return -1; 308 309 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */ 310 history_length = 0; 311 max_input_history = INT_MAX; 312 el_set(e, EL_HIST, history, h); 313 314 /* Setup resize function */ 315 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); 316 317 /* setup getc function if valid */ 318 if (rl_getc_function) 319 el_set(e, EL_GETCFN, _getc_function); 320 321 /* for proper prompt printing in readline() */ 322 if (rl_set_prompt("") == -1) { 323 history_end(h); 324 el_end(e); 325 return -1; 326 } 327 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 328 el_set(e, EL_SIGNAL, rl_catch_signals); 329 330 /* set default mode to "emacs"-style and read setting afterwards */ 331 /* so this can be overriden */ 332 el_set(e, EL_EDITOR, "emacs"); 333 if (rl_terminal_name != NULL) 334 el_set(e, EL_TERMINAL, rl_terminal_name); 335 else 336 el_get(e, EL_TERMINAL, &rl_terminal_name); 337 338 /* 339 * Word completion - this has to go AFTER rebinding keys 340 * to emacs-style. 341 */ 342 el_set(e, EL_ADDFN, "rl_complete", 343 "ReadLine compatible completion function", 344 _el_rl_complete); 345 el_set(e, EL_BIND, "^I", "rl_complete", NULL); 346 347 /* 348 * Send TSTP when ^Z is pressed. 349 */ 350 el_set(e, EL_ADDFN, "rl_tstp", 351 "ReadLine compatible suspend function", 352 _el_rl_tstp); 353 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL); 354 355 /* 356 * Word delete when ^W is pressed. 357 */ 358 el_set(e, EL_BIND, "^W", "ed-delete-prev-word", NULL); 359 360 /* read settings from configuration file */ 361 el_source(e, NULL); 362 363 /* 364 * Unfortunately, some applications really do use rl_point 365 * and rl_line_buffer directly. 366 */ 367 _resize_fun(e, &rl_line_buffer); 368 _rl_update_pos(); 369 370 if (rl_startup_hook) 371 (*rl_startup_hook)(NULL, 0); 372 373 return 0; 374} 375 376 377/* 378 * read one line from input stream and return it, chomping 379 * trailing newline (if there is any) 380 */ 381char * 382readline(const char *p) 383{ 384 HistEvent ev; 385 const char * volatile prompt = p; 386 int count; 387 const char *ret; 388 char *buf; 389 static int used_event_hook; 390 391 if (e == NULL || h == NULL) 392 rl_initialize(); 393 394 rl_done = 0; 395 396 (void)setjmp(topbuf); 397 398 /* update prompt accordingly to what has been passed */ 399 if (rl_set_prompt(prompt) == -1) 400 return NULL; 401 402 if (rl_pre_input_hook) 403 (*rl_pre_input_hook)(NULL, 0); 404 405 if (rl_event_hook && !(e->el_flags&NO_TTY)) { 406 el_set(e, EL_GETCFN, _rl_event_read_char); 407 used_event_hook = 1; 408 } 409 410 if (!rl_event_hook && used_event_hook) { 411 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN); 412 used_event_hook = 0; 413 } 414 415 rl_already_prompted = 0; 416 417 /* get one line from input stream */ 418 ret = el_gets(e, &count); 419 420 if (ret && count > 0) { 421 int lastidx; 422 423 buf = strdup(ret); 424 if (buf == NULL) 425 return NULL; 426 lastidx = count - 1; 427 if (buf[lastidx] == '\n') 428 buf[lastidx] = '\0'; 429 } else 430 buf = NULL; 431 432 history(h, &ev, H_GETSIZE); 433 history_length = ev.num; 434 435 return buf; 436} 437 438/* 439 * history functions 440 */ 441 442/* 443 * is normally called before application starts to use 444 * history expansion functions 445 */ 446void 447using_history(void) 448{ 449 if (h == NULL || e == NULL) 450 rl_initialize(); 451} 452 453 454/* 455 * substitute ``what'' with ``with'', returning resulting string; if 456 * globally == 1, substitutes all occurrences of what, otherwise only the 457 * first one 458 */ 459static char * 460_rl_compat_sub(const char *str, const char *what, const char *with, 461 int globally) 462{ 463 const char *s; 464 char *r, *result; 465 size_t len, with_len, what_len; 466 467 len = strlen(str); 468 with_len = strlen(with); 469 what_len = strlen(what); 470 471 /* calculate length we need for result */ 472 s = str; 473 while (*s) { 474 if (*s == *what && !strncmp(s, what, what_len)) { 475 len += with_len - what_len; 476 if (!globally) 477 break; 478 s += what_len; 479 } else 480 s++; 481 } 482 r = result = el_malloc((len + 1) * sizeof(*r)); 483 if (result == NULL) 484 return NULL; 485 s = str; 486 while (*s) { 487 if (*s == *what && !strncmp(s, what, what_len)) { 488 (void)strncpy(r, with, with_len); 489 r += with_len; 490 s += what_len; 491 if (!globally) { 492 (void)strcpy(r, s); 493 return result; 494 } 495 } else 496 *r++ = *s++; 497 } 498 *r = '\0'; 499 return result; 500} 501 502static char *last_search_pat; /* last !?pat[?] search pattern */ 503static char *last_search_match; /* last !?pat[?] that matched */ 504 505const char * 506get_history_event(const char *cmd, int *cindex, int qchar) 507{ 508 int idx, sign, sub, num, begin, ret; 509 size_t len; 510 char *pat; 511 const char *rptr; 512 HistEvent ev; 513 514 idx = *cindex; 515 if (cmd[idx++] != history_expansion_char) 516 return NULL; 517 518 /* find out which event to take */ 519 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') { 520 if (history(h, &ev, H_FIRST) != 0) 521 return NULL; 522 *cindex = cmd[idx]? (idx + 1):idx; 523 return ev.str; 524 } 525 sign = 0; 526 if (cmd[idx] == '-') { 527 sign = 1; 528 idx++; 529 } 530 531 if ('0' <= cmd[idx] && cmd[idx] <= '9') { 532 HIST_ENTRY *rl_he; 533 534 num = 0; 535 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') { 536 num = num * 10 + cmd[idx] - '0'; 537 idx++; 538 } 539 if (sign) 540 num = history_length - num + 1; 541 542 if (!(rl_he = history_get(num))) 543 return NULL; 544 545 *cindex = idx; 546 return rl_he->line; 547 } 548 sub = 0; 549 if (cmd[idx] == '?') { 550 sub = 1; 551 idx++; 552 } 553 begin = idx; 554 while (cmd[idx]) { 555 if (cmd[idx] == '\n') 556 break; 557 if (sub && cmd[idx] == '?') 558 break; 559 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' ' 560 || cmd[idx] == '\t' || cmd[idx] == qchar)) 561 break; 562 idx++; 563 } 564 len = (size_t)idx - (size_t)begin; 565 if (sub && cmd[idx] == '?') 566 idx++; 567 if (sub && len == 0 && last_search_pat && *last_search_pat) 568 pat = last_search_pat; 569 else if (len == 0) 570 return NULL; 571 else { 572 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL) 573 return NULL; 574 (void)strncpy(pat, cmd + begin, len); 575 pat[len] = '\0'; 576 } 577 578 if (history(h, &ev, H_CURR) != 0) { 579 if (pat != last_search_pat) 580 el_free(pat); 581 return NULL; 582 } 583 num = ev.num; 584 585 if (sub) { 586 if (pat != last_search_pat) { 587 if (last_search_pat) 588 el_free(last_search_pat); 589 last_search_pat = pat; 590 } 591 ret = history_search(pat, -1); 592 } else 593 ret = history_search_prefix(pat, -1); 594 595 if (ret == -1) { 596 /* restore to end of list on failed search */ 597 history(h, &ev, H_FIRST); 598 (void)fprintf(rl_outstream, "%s: Event not found\n", pat); 599 if (pat != last_search_pat) 600 el_free(pat); 601 return NULL; 602 } 603 604 if (sub && len) { 605 if (last_search_match && last_search_match != pat) 606 el_free(last_search_match); 607 last_search_match = pat; 608 } 609 610 if (pat != last_search_pat) 611 el_free(pat); 612 613 if (history(h, &ev, H_CURR) != 0) 614 return NULL; 615 *cindex = idx; 616 rptr = ev.str; 617 618 /* roll back to original position */ 619 (void)history(h, &ev, H_SET, num); 620 621 return rptr; 622} 623 624/* 625 * the real function doing history expansion - takes as argument command 626 * to do and data upon which the command should be executed 627 * does expansion the way I've understood readline documentation 628 * 629 * returns 0 if data was not modified, 1 if it was and 2 if the string 630 * should be only printed and not executed; in case of error, 631 * returns -1 and *result points to NULL 632 * it's callers responsibility to free() string returned in *result 633 */ 634static int 635_history_expand_command(const char *command, size_t offs, size_t cmdlen, 636 char **result) 637{ 638 char *tmp, *search = NULL, *aptr; 639 const char *ptr, *cmd; 640 static char *from = NULL, *to = NULL; 641 int start, end, idx, has_mods = 0; 642 int p_on = 0, g_on = 0; 643 644 *result = NULL; 645 aptr = NULL; 646 ptr = NULL; 647 648 /* First get event specifier */ 649 idx = 0; 650 651 if (strchr(":^*$", command[offs + 1])) { 652 char str[4]; 653 /* 654 * "!:" is shorthand for "!!:". 655 * "!^", "!*" and "!$" are shorthand for 656 * "!!:^", "!!:*" and "!!:$" respectively. 657 */ 658 str[0] = str[1] = '!'; 659 str[2] = '0'; 660 ptr = get_history_event(str, &idx, 0); 661 idx = (command[offs + 1] == ':')? 1:0; 662 has_mods = 1; 663 } else { 664 if (command[offs + 1] == '#') { 665 /* use command so far */ 666 if ((aptr = el_malloc((offs + 1) * sizeof(*aptr))) 667 == NULL) 668 return -1; 669 (void)strncpy(aptr, command, offs); 670 aptr[offs] = '\0'; 671 idx = 1; 672 } else { 673 int qchar; 674 675 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0; 676 ptr = get_history_event(command + offs, &idx, qchar); 677 } 678 has_mods = command[offs + (size_t)idx] == ':'; 679 } 680 681 if (ptr == NULL && aptr == NULL) 682 return -1; 683 684 if (!has_mods) { 685 *result = strdup(aptr ? aptr : ptr); 686 if (aptr) 687 el_free(aptr); 688 if (*result == NULL) 689 return -1; 690 return 1; 691 } 692 693 cmd = command + offs + idx + 1; 694 695 /* Now parse any word designators */ 696 697 if (*cmd == '%') /* last word matched by ?pat? */ 698 tmp = strdup(last_search_match? last_search_match:""); 699 else if (strchr("^*$-0123456789", *cmd)) { 700 start = end = -1; 701 if (*cmd == '^') 702 start = end = 1, cmd++; 703 else if (*cmd == '$') 704 start = -1, cmd++; 705 else if (*cmd == '*') 706 start = 1, cmd++; 707 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) { 708 start = 0; 709 while (*cmd && '0' <= *cmd && *cmd <= '9') 710 start = start * 10 + *cmd++ - '0'; 711 712 if (*cmd == '-') { 713 if (isdigit((unsigned char) cmd[1])) { 714 cmd++; 715 end = 0; 716 while (*cmd && '0' <= *cmd && *cmd <= '9') 717 end = end * 10 + *cmd++ - '0'; 718 } else if (cmd[1] == '$') { 719 cmd += 2; 720 end = -1; 721 } else { 722 cmd++; 723 end = -2; 724 } 725 } else if (*cmd == '*') 726 end = -1, cmd++; 727 else 728 end = start; 729 } 730 tmp = history_arg_extract(start, end, aptr? aptr:ptr); 731 if (tmp == NULL) { 732 (void)fprintf(rl_outstream, "%s: Bad word specifier", 733 command + offs + idx); 734 if (aptr) 735 el_free(aptr); 736 return -1; 737 } 738 } else 739 tmp = strdup(aptr? aptr:ptr); 740 741 if (aptr) 742 el_free(aptr); 743 744 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) { 745 *result = tmp; 746 return 1; 747 } 748 749 for (; *cmd; cmd++) { 750 if (*cmd == ':') 751 continue; 752 else if (*cmd == 'h') { /* remove trailing path */ 753 if ((aptr = strrchr(tmp, '/')) != NULL) 754 *aptr = '\0'; 755 } else if (*cmd == 't') { /* remove leading path */ 756 if ((aptr = strrchr(tmp, '/')) != NULL) { 757 aptr = strdup(aptr + 1); 758 el_free(tmp); 759 tmp = aptr; 760 } 761 } else if (*cmd == 'r') { /* remove trailing suffix */ 762 if ((aptr = strrchr(tmp, '.')) != NULL) 763 *aptr = '\0'; 764 } else if (*cmd == 'e') { /* remove all but suffix */ 765 if ((aptr = strrchr(tmp, '.')) != NULL) { 766 aptr = strdup(aptr); 767 el_free(tmp); 768 tmp = aptr; 769 } 770 } else if (*cmd == 'p') /* print only */ 771 p_on = 1; 772 else if (*cmd == 'g') 773 g_on = 2; 774 else if (*cmd == 's' || *cmd == '&') { 775 char *what, *with, delim; 776 size_t len, from_len; 777 size_t size; 778 779 if (*cmd == '&' && (from == NULL || to == NULL)) 780 continue; 781 else if (*cmd == 's') { 782 delim = *(++cmd), cmd++; 783 size = 16; 784 what = el_realloc(from, size * sizeof(*what)); 785 if (what == NULL) { 786 el_free(from); 787 el_free(tmp); 788 return 0; 789 } 790 len = 0; 791 for (; *cmd && *cmd != delim; cmd++) { 792 if (*cmd == '\\' && cmd[1] == delim) 793 cmd++; 794 what[len++] = *cmd; 795 if (len >= size) { 796 char *nwhat; 797 nwhat = el_realloc(what, 798 (size <<= 1) * 799 sizeof(*nwhat)); 800 if (nwhat == NULL) { 801 el_free(what); 802 el_free(tmp); 803 return 0; 804 } 805 what = nwhat; 806 } 807 } 808 what[len] = '\0'; 809 from = what; 810 if (*what == '\0') { 811 el_free(what); 812 if (search) { 813 from = strdup(search); 814 if (from == NULL) { 815 el_free(tmp); 816 return 0; 817 } 818 } else { 819 from = NULL; 820 el_free(tmp); 821 return -1; 822 } 823 } 824 cmd++; /* shift after delim */ 825 if (!*cmd) 826 continue; 827 828 size = 16; 829 with = el_realloc(to, (size+1) * sizeof(*with)); // +1 for trailing nil 830 if (with == NULL) { 831 el_free(to); 832 el_free(tmp); 833 return -1; 834 } 835 len = 0; 836 from_len = strlen(from); 837 for (; *cmd && *cmd != delim; cmd++) { 838 if (len + from_len + 1 >= size) { 839 char *nwith; 840 size += from_len + 1; 841 nwith = el_realloc(with, 842 (size+1) * sizeof(*nwith)); // +1 for trailing nil 843 if (nwith == NULL) { 844 el_free(with); 845 el_free(tmp); 846 return -1; 847 } 848 with = nwith; 849 } 850 if (*cmd == '&') { 851 /* safe */ 852 (void)strcpy(&with[len], from); 853 len += from_len; 854 continue; 855 } 856 if (*cmd == '\\' 857 && (*(cmd + 1) == delim 858 || *(cmd + 1) == '&')) 859 cmd++; 860 with[len++] = *cmd; 861 } 862 with[len] = '\0'; 863 to = with; 864 } 865 866 aptr = _rl_compat_sub(tmp, from, to, g_on); 867 if (aptr) { 868 el_free(tmp); 869 tmp = aptr; 870 } 871 g_on = 0; 872 } 873 } 874 *result = tmp; 875 return p_on? 2:1; 876} 877 878 879/* 880 * csh-style history expansion 881 */ 882int 883history_expand(char *str, char **output) 884{ 885 int ret = 0; 886 size_t idx, i, size; 887 char *tmp, *result; 888 889 if (h == NULL || e == NULL) 890 rl_initialize(); 891 892 if (history_expansion_char == 0) { 893 *output = strdup(str); 894 return 0; 895 } 896 897 *output = NULL; 898 if (str[0] == history_subst_char) { 899 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */ 900 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output)); 901 if (*output == NULL) 902 return 0; 903 (*output)[0] = (*output)[1] = history_expansion_char; 904 (*output)[2] = ':'; 905 (*output)[3] = 's'; 906 (void)strcpy((*output) + 4, str); 907 str = *output; 908 } else { 909 *output = strdup(str); 910 if (*output == NULL) 911 return 0; 912 } 913 914#define ADD_STRING(what, len, fr) \ 915 { \ 916 if (idx + len + 1 > size) { \ 917 char *nresult = el_realloc(result, \ 918 (size += len + 1) * sizeof(*nresult)); \ 919 if (nresult == NULL) { \ 920 el_free(*output); \ 921 if (/*CONSTCOND*/fr) \ 922 el_free(tmp); \ 923 return 0; \ 924 } \ 925 result = nresult; \ 926 } \ 927 (void)strncpy(&result[idx], what, len); \ 928 idx += len; \ 929 result[idx] = '\0'; \ 930 } 931 932 result = NULL; 933 size = idx = 0; 934 tmp = NULL; 935 for (i = 0; str[i];) { 936 int qchar, loop_again; 937 size_t len, start, j; 938 939 qchar = 0; 940 loop_again = 1; 941 start = j = i; 942loop: 943 for (; str[j]; j++) { 944 if (str[j] == '\\' && 945 str[j + 1] == history_expansion_char) { 946 (void)strcpy(&str[j], &str[j + 1]); 947 continue; 948 } 949 if (!loop_again) { 950 if (isspace((unsigned char) str[j]) 951 || str[j] == qchar) 952 break; 953 } 954 if (str[j] == history_expansion_char 955 && !strchr(history_no_expand_chars, str[j + 1]) 956 && (!history_inhibit_expansion_function || 957 (*history_inhibit_expansion_function)(str, 958 (int)j) == 0)) 959 break; 960 } 961 962 if (str[j] && loop_again) { 963 i = j; 964 qchar = (j > 0 && str[j - 1] == '"' )? '"':0; 965 j++; 966 if (str[j] == history_expansion_char) 967 j++; 968 loop_again = 0; 969 goto loop; 970 } 971 len = i - start; 972 ADD_STRING(&str[start], len, 0); 973 974 if (str[i] == '\0' || str[i] != history_expansion_char) { 975 len = j - i; 976 ADD_STRING(&str[i], len, 0); 977 if (start == 0) 978 ret = 0; 979 else 980 ret = 1; 981 break; 982 } 983 ret = _history_expand_command (str, i, (j - i), &tmp); 984 if (ret > 0 && tmp) { 985 len = strlen(tmp); 986 ADD_STRING(tmp, len, 1); 987 } 988 if (tmp) { 989 el_free(tmp); 990 tmp = NULL; 991 } 992 i = j; 993 } 994 995 /* ret is 2 for "print only" option */ 996 if (ret == 2) { 997 add_history(result); 998#ifdef GDB_411_HACK 999 /* gdb 4.11 has been shipped with readline, where */ 1000 /* history_expand() returned -1 when the line */ 1001 /* should not be executed; in readline 2.1+ */ 1002 /* it should return 2 in such a case */ 1003 ret = -1; 1004#endif 1005 } 1006 el_free(*output); 1007 *output = result; 1008 1009 return ret; 1010} 1011 1012/* 1013* Return a string consisting of arguments of "str" from "start" to "end". 1014*/ 1015char * 1016history_arg_extract(int start, int end, const char *str) 1017{ 1018 size_t i, len, max; 1019 char **arr, *result = NULL; 1020 1021 arr = history_tokenize(str); 1022 if (!arr) 1023 return NULL; 1024 if (arr && *arr == NULL) 1025 goto out; 1026 1027 for (max = 0; arr[max]; max++) 1028 continue; 1029 max--; 1030 1031 if (start == '$') 1032 start = (int)max; 1033 if (end == '$') 1034 end = (int)max; 1035 if (end < 0) 1036 end = (int)max + end + 1; 1037 if (start < 0) 1038 start = end; 1039 1040 if (start < 0 || end < 0 || (size_t)start > max || 1041 (size_t)end > max || start > end) 1042 goto out; 1043 1044 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) 1045 len += strlen(arr[i]) + 1; 1046 len++; 1047 result = el_malloc(len * sizeof(*result)); 1048 if (result == NULL) 1049 goto out; 1050 1051 for (i = (size_t)start, len = 0; i <= (size_t)end; i++) { 1052 (void)strcpy(result + len, arr[i]); 1053 len += strlen(arr[i]); 1054 if (i < (size_t)end) 1055 result[len++] = ' '; 1056 } 1057 result[len] = '\0'; 1058 1059out: 1060 for (i = 0; arr[i]; i++) 1061 el_free(arr[i]); 1062 el_free(arr); 1063 1064 return result; 1065} 1066 1067/* 1068 * Parse the string into individual tokens, 1069 * similar to how shell would do it. 1070 */ 1071char ** 1072history_tokenize(const char *str) 1073{ 1074 int size = 1, idx = 0, i, start; 1075 size_t len; 1076 char **result = NULL, *temp, delim = '\0'; 1077 1078 for (i = 0; str[i];) { 1079 while (isspace((unsigned char) str[i])) 1080 i++; 1081 start = i; 1082 for (; str[i];) { 1083 if (str[i] == '\\') { 1084 if (str[i+1] != '\0') 1085 i++; 1086 } else if (str[i] == delim) 1087 delim = '\0'; 1088 else if (!delim && 1089 (isspace((unsigned char) str[i]) || 1090 strchr("()<>;&|$", str[i]))) 1091 break; 1092 else if (!delim && strchr("'`\"", str[i])) 1093 delim = str[i]; 1094 if (str[i]) 1095 i++; 1096 } 1097 1098 if (idx + 2 >= size) { 1099 char **nresult; 1100 size <<= 1; 1101 nresult = el_realloc(result, (size_t)size * sizeof(*nresult)); 1102 if (nresult == NULL) { 1103 el_free(result); 1104 return NULL; 1105 } 1106 result = nresult; 1107 } 1108 len = (size_t)i - (size_t)start; 1109 temp = el_malloc((size_t)(len + 1) * sizeof(*temp)); 1110 if (temp == NULL) { 1111 for (i = 0; i < idx; i++) 1112 el_free(result[i]); 1113 el_free(result); 1114 return NULL; 1115 } 1116 (void)strncpy(temp, &str[start], len); 1117 temp[len] = '\0'; 1118 result[idx++] = temp; 1119 result[idx] = NULL; 1120 if (str[i]) 1121 i++; 1122 } 1123 return result; 1124} 1125 1126 1127/* 1128 * limit size of history record to ``max'' events 1129 */ 1130void 1131stifle_history(int max) 1132{ 1133 HistEvent ev; 1134 1135 if (h == NULL || e == NULL) 1136 rl_initialize(); 1137 1138 if (history(h, &ev, H_SETSIZE, max) == 0) 1139 max_input_history = max; 1140} 1141 1142 1143/* 1144 * "unlimit" size of history - set the limit to maximum allowed int value 1145 */ 1146int 1147unstifle_history(void) 1148{ 1149 HistEvent ev; 1150 int omax; 1151 1152 history(h, &ev, H_SETSIZE, INT_MAX); 1153 omax = max_input_history; 1154 max_input_history = INT_MAX; 1155 return omax; /* some value _must_ be returned */ 1156} 1157 1158 1159int 1160history_is_stifled(void) 1161{ 1162 1163 /* cannot return true answer */ 1164 return max_input_history != INT_MAX; 1165} 1166 1167static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; 1168 1169int 1170history_truncate_file (const char *filename, int nlines) 1171{ 1172 int ret = 0; 1173 FILE *fp, *tp; 1174 char template[sizeof(_history_tmp_template)]; 1175 char buf[4096]; 1176 int fd; 1177 char *cp; 1178 off_t off; 1179 int count = 0; 1180 ssize_t left = 0; 1181 1182 if (filename == NULL && (filename = _default_history_file()) == NULL) 1183 return errno; 1184 if ((fp = fopen(filename, "r+")) == NULL) 1185 return errno; 1186 strcpy(template, _history_tmp_template); 1187 if ((fd = mkstemp(template)) == -1) { 1188 ret = errno; 1189 goto out1; 1190 } 1191 1192 if ((tp = fdopen(fd, "r+")) == NULL) { 1193 close(fd); 1194 ret = errno; 1195 goto out2; 1196 } 1197 1198 for(;;) { 1199 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) { 1200 if (ferror(fp)) { 1201 ret = errno; 1202 break; 1203 } 1204 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == 1205 (off_t)-1) { 1206 ret = errno; 1207 break; 1208 } 1209 left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp); 1210 if (ferror(fp)) { 1211 ret = errno; 1212 break; 1213 } 1214 if (left == 0) { 1215 count--; 1216 left = sizeof(buf); 1217 } else if (fwrite(buf, (size_t)left, (size_t)1, tp) 1218 != 1) { 1219 ret = errno; 1220 break; 1221 } 1222 fflush(tp); 1223 break; 1224 } 1225 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) { 1226 ret = errno; 1227 break; 1228 } 1229 count++; 1230 } 1231 if (ret) 1232 goto out3; 1233 cp = buf + left - 1; 1234 if(*cp != '\n') 1235 cp++; 1236 for(;;) { 1237 while (--cp >= buf) { 1238 if (*cp == '\n') { 1239 if (--nlines == 0) { 1240 if (++cp >= buf + sizeof(buf)) { 1241 count++; 1242 cp = buf; 1243 } 1244 break; 1245 } 1246 } 1247 } 1248 if (nlines <= 0 || count == 0) 1249 break; 1250 count--; 1251 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) { 1252 ret = errno; 1253 break; 1254 } 1255 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) { 1256 if (ferror(tp)) { 1257 ret = errno; 1258 break; 1259 } 1260 ret = EAGAIN; 1261 break; 1262 } 1263 cp = buf + sizeof(buf); 1264 } 1265 1266 if (ret || nlines > 0) 1267 goto out3; 1268 1269 if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) { 1270 ret = errno; 1271 goto out3; 1272 } 1273 1274 /* copy the magic cookie line */ 1275 if (fseeko(tp, 0, SEEK_SET) == (off_t)-1) { 1276 ret = errno; 1277 goto out3; 1278 } 1279 if (fgets(buf, sizeof(buf), tp) == NULL) { 1280 ret = errno; 1281 goto out3; 1282 } 1283 if (fputs(buf, fp) == EOF) { 1284 ret = errno; 1285 goto out3; 1286 } 1287 1288 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == 1289 (off_t)-1) { 1290 ret = errno; 1291 goto out3; 1292 } 1293 1294 for(;;) { 1295 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) { 1296 if (ferror(fp)) 1297 ret = errno; 1298 break; 1299 } 1300 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) { 1301 ret = errno; 1302 break; 1303 } 1304 } 1305 fflush(fp); 1306 if((off = ftello(fp)) > 0) 1307 (void)ftruncate(fileno(fp), off); 1308out3: 1309 fclose(tp); 1310out2: 1311 unlink(template); 1312out1: 1313 fclose(fp); 1314 1315 return ret; 1316} 1317 1318 1319/* 1320 * read history from a file given 1321 */ 1322int 1323read_history(const char *filename) 1324{ 1325 HistEvent ev; 1326 1327 if (h == NULL || e == NULL) 1328 rl_initialize(); 1329 if (filename == NULL && (filename = _default_history_file()) == NULL) 1330 return errno; 1331 if (history(h, &ev, H_LOAD, filename) == -1) 1332 return (errno ? errno : EINVAL); 1333 if (history(h, &ev, H_GETSIZE) == 0) 1334 history_length = ev.num; 1335 1336 return (!(history_length > 0)); /* return 0 if all is okay */ 1337} 1338 1339 1340/* 1341 * write history to a file given 1342 */ 1343int 1344write_history(const char *filename) 1345{ 1346 HistEvent ev; 1347 1348 if (h == NULL || e == NULL) 1349 rl_initialize(); 1350 if (filename == NULL && (filename = _default_history_file()) == NULL) 1351 return errno; 1352 return history(h, &ev, H_SAVE, filename) == -1 ? 1353 (errno ? errno : EINVAL) : 0; 1354} 1355 1356 1357/* 1358 * returns history ``num''th event 1359 * 1360 * returned pointer points to static variable 1361 */ 1362HIST_ENTRY * 1363history_get(int num) 1364{ 1365 static HIST_ENTRY she; 1366 HistEvent ev; 1367 int curr_num; 1368 1369 if (h == NULL || e == NULL) 1370 rl_initialize(); 1371 1372 if (num < history_base) 1373 return NULL; 1374 1375 /* save current position */ 1376 if (history(h, &ev, H_CURR) != 0) 1377 return NULL; 1378 curr_num = ev.num; 1379 1380 /* start from the oldest */ 1381 if (history(h, &ev, H_LAST) != 0) 1382 return NULL; /* error */ 1383 1384 /* look forwards for event matching specified offset */ 1385 if (history(h, &ev, H_NEXT_EVDATA, num - history_base, &she.data)) 1386 return NULL; 1387 1388 she.line = ev.str; 1389 1390 /* restore pointer to where it was */ 1391 (void)history(h, &ev, H_SET, curr_num); 1392 1393 return &she; 1394} 1395 1396 1397/* 1398 * add the line to history table 1399 */ 1400int 1401add_history(const char *line) 1402{ 1403 HistEvent ev; 1404 1405 if (line == NULL) 1406 return 0; 1407 1408 if (h == NULL || e == NULL) 1409 rl_initialize(); 1410 1411 (void)history(h, &ev, H_ENTER, line); 1412 if (history(h, &ev, H_GETSIZE) == 0) 1413 history_length = ev.num; 1414 1415 return !(history_length > 0); /* return 0 if all is okay */ 1416} 1417 1418 1419/* 1420 * remove the specified entry from the history list and return it. 1421 */ 1422HIST_ENTRY * 1423remove_history(int num) 1424{ 1425 HIST_ENTRY *he; 1426 HistEvent ev; 1427 1428 if (h == NULL || e == NULL) 1429 rl_initialize(); 1430 1431 if ((he = el_malloc(sizeof(*he))) == NULL) 1432 return NULL; 1433 1434 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { 1435 el_free(he); 1436 return NULL; 1437 } 1438 1439 he->line = ev.str; 1440 if (history(h, &ev, H_GETSIZE) == 0) 1441 history_length = ev.num; 1442 1443 return he; 1444} 1445 1446 1447/* 1448 * replace the line and data of the num-th entry 1449 */ 1450HIST_ENTRY * 1451replace_history_entry(int num, const char *line, histdata_t data) 1452{ 1453 HIST_ENTRY *he; 1454 HistEvent ev; 1455 int curr_num; 1456 1457 if (h == NULL || e == NULL) 1458 rl_initialize(); 1459 1460 /* save current position */ 1461 if (history(h, &ev, H_CURR) != 0) 1462 return NULL; 1463 curr_num = ev.num; 1464 1465 /* start from the oldest */ 1466 if (history(h, &ev, H_LAST) != 0) 1467 return NULL; /* error */ 1468 1469 if ((he = el_malloc(sizeof(*he))) == NULL) 1470 return NULL; 1471 1472 /* look forwards for event matching specified offset */ 1473 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) 1474 goto out; 1475 1476 he->line = strdup(ev.str); 1477 if (he->line == NULL) 1478 goto out; 1479 1480 if (history(h, &ev, H_REPLACE, line, data)) 1481 goto out; 1482 1483 /* restore pointer to where it was */ 1484 if (history(h, &ev, H_SET, curr_num)) 1485 goto out; 1486 1487 return he; 1488out: 1489 el_free(he); 1490 return NULL; 1491} 1492 1493/* 1494 * clear the history list - delete all entries 1495 */ 1496void 1497clear_history(void) 1498{ 1499 HistEvent ev; 1500 1501 (void)history(h, &ev, H_CLEAR); 1502 history_length = 0; 1503} 1504 1505 1506/* 1507 * returns offset of the current history event 1508 */ 1509int 1510where_history(void) 1511{ 1512 HistEvent ev; 1513 int curr_num, off; 1514 1515 if (history(h, &ev, H_CURR) != 0) 1516 return 0; 1517 curr_num = ev.num; 1518 1519 (void)history(h, &ev, H_FIRST); 1520 off = 1; 1521 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0) 1522 off++; 1523 1524 return off; 1525} 1526 1527 1528/* 1529 * returns current history event or NULL if there is no such event 1530 */ 1531HIST_ENTRY * 1532current_history(void) 1533{ 1534 1535 return _move_history(H_CURR); 1536} 1537 1538 1539/* 1540 * returns total number of bytes history events' data are using 1541 */ 1542int 1543history_total_bytes(void) 1544{ 1545 HistEvent ev; 1546 int curr_num; 1547 size_t size; 1548 1549 if (history(h, &ev, H_CURR) != 0) 1550 return -1; 1551 curr_num = ev.num; 1552 1553 (void)history(h, &ev, H_FIRST); 1554 size = 0; 1555 do 1556 size += strlen(ev.str) * sizeof(*ev.str); 1557 while (history(h, &ev, H_NEXT) == 0); 1558 1559 /* get to the same position as before */ 1560 history(h, &ev, H_PREV_EVENT, curr_num); 1561 1562 return (int)size; 1563} 1564 1565 1566/* 1567 * sets the position in the history list to ``pos'' 1568 */ 1569int 1570history_set_pos(int pos) 1571{ 1572 HistEvent ev; 1573 int curr_num; 1574 1575 if (pos >= history_length || pos < 0) 1576 return -1; 1577 1578 (void)history(h, &ev, H_CURR); 1579 curr_num = ev.num; 1580 1581 /* 1582 * use H_DELDATA to set to nth history (without delete) by passing 1583 * (void **)-1 1584 */ 1585 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { 1586 (void)history(h, &ev, H_SET, curr_num); 1587 return -1; 1588 } 1589 return 0; 1590} 1591 1592 1593/* 1594 * returns previous event in history and shifts pointer accordingly 1595 */ 1596HIST_ENTRY * 1597previous_history(void) 1598{ 1599 1600 return _move_history(H_PREV); 1601} 1602 1603 1604/* 1605 * returns next event in history and shifts pointer accordingly 1606 */ 1607HIST_ENTRY * 1608next_history(void) 1609{ 1610 1611 return _move_history(H_NEXT); 1612} 1613 1614 1615/* 1616 * searches for first history event containing the str 1617 */ 1618int 1619history_search(const char *str, int direction) 1620{ 1621 HistEvent ev; 1622 const char *strp; 1623 int curr_num; 1624 1625 if (history(h, &ev, H_CURR) != 0) 1626 return -1; 1627 curr_num = ev.num; 1628 1629 for (;;) { 1630 if ((strp = strstr(ev.str, str)) != NULL) 1631 return (int)(strp - ev.str); 1632 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0) 1633 break; 1634 } 1635 (void)history(h, &ev, H_SET, curr_num); 1636 return -1; 1637} 1638 1639 1640/* 1641 * searches for first history event beginning with str 1642 */ 1643int 1644history_search_prefix(const char *str, int direction) 1645{ 1646 HistEvent ev; 1647 1648 return (history(h, &ev, direction < 0 ? 1649 H_PREV_STR : H_NEXT_STR, str)); 1650} 1651 1652 1653/* 1654 * search for event in history containing str, starting at offset 1655 * abs(pos); continue backward, if pos<0, forward otherwise 1656 */ 1657/* ARGSUSED */ 1658int 1659history_search_pos(const char *str, 1660 int direction __attribute__((__unused__)), int pos) 1661{ 1662 HistEvent ev; 1663 int curr_num, off; 1664 1665 off = (pos > 0) ? pos : -pos; 1666 pos = (pos > 0) ? 1 : -1; 1667 1668 if (history(h, &ev, H_CURR) != 0) 1669 return -1; 1670 curr_num = ev.num; 1671 1672 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0) 1673 return -1; 1674 1675 for (;;) { 1676 if (strstr(ev.str, str)) 1677 return off; 1678 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0) 1679 break; 1680 } 1681 1682 /* set "current" pointer back to previous state */ 1683 (void)history(h, &ev, 1684 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num); 1685 1686 return -1; 1687} 1688 1689 1690/********************************/ 1691/* completion functions */ 1692 1693char * 1694tilde_expand(char *name) 1695{ 1696 return fn_tilde_expand(name); 1697} 1698 1699char * 1700filename_completion_function(const char *name, int state) 1701{ 1702 return fn_filename_completion_function(name, state); 1703} 1704 1705/* 1706 * a completion generator for usernames; returns _first_ username 1707 * which starts with supplied text 1708 * text contains a partial username preceded by random character 1709 * (usually '~'); state resets search from start (??? should we do that anyway) 1710 * it's callers responsibility to free returned value 1711 */ 1712char * 1713username_completion_function(const char *text, int state) 1714{ 1715 struct passwd *pass = NULL; 1716 1717 if (text[0] == '\0') 1718 return NULL; 1719 1720 if (*text == '~') 1721 text++; 1722 1723 if (state == 0) 1724 setpwent(); 1725 1726 while ( 1727 (pass = getpwent()) != NULL 1728 && text[0] == pass->pw_name[0] 1729 && strcmp(text, pass->pw_name) == 0) 1730 continue; 1731 1732 if (pass == NULL) { 1733 endpwent(); 1734 return NULL; 1735 } 1736 return strdup(pass->pw_name); 1737} 1738 1739 1740/* 1741 * el-compatible wrapper to send TSTP on ^Z 1742 */ 1743/* ARGSUSED */ 1744static unsigned char 1745_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__))) 1746{ 1747 (void)kill(0, SIGTSTP); 1748 return CC_NORM; 1749} 1750 1751/* 1752 * Display list of strings in columnar format on readline's output stream. 1753 * 'matches' is list of strings, 'len' is number of strings in 'matches', 1754 * 'max' is maximum length of string in 'matches'. 1755 */ 1756void 1757rl_display_match_list(char **matches, int len, int max) 1758{ 1759 1760 fn_display_match_list(e, matches, (size_t)len, (size_t)max); 1761} 1762 1763static const char * 1764/*ARGSUSED*/ 1765_rl_completion_append_character_function(const char *dummy 1766 __attribute__((__unused__))) 1767{ 1768 static char buf[2]; 1769 buf[0] = (char)rl_completion_append_character; 1770 buf[1] = '\0'; 1771 return buf; 1772} 1773 1774 1775/* 1776 * complete word at current point 1777 */ 1778/* ARGSUSED */ 1779int 1780rl_complete(int ignore __attribute__((__unused__)), int invoking_key) 1781{ 1782#ifdef WIDECHAR 1783 static ct_buffer_t wbreak_conv, sprefix_conv; 1784#endif 1785 char *breakchars; 1786 1787 if (h == NULL || e == NULL) 1788 rl_initialize(); 1789 1790 if (rl_inhibit_completion) { 1791 char arr[2]; 1792 arr[0] = (char)invoking_key; 1793 arr[1] = '\0'; 1794 el_insertstr(e, arr); 1795 return CC_REFRESH; 1796 } 1797 1798 if (rl_completion_word_break_hook != NULL) 1799 breakchars = (*rl_completion_word_break_hook)(); 1800 else 1801 breakchars = rl_basic_word_break_characters; 1802 1803 /* Just look at how many global variables modify this operation! */ 1804 return fn_complete(e, 1805 (CPFunction *)rl_completion_entry_function, 1806 rl_attempted_completion_function, 1807 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), 1808 ct_decode_string(breakchars, &sprefix_conv), 1809 _rl_completion_append_character_function, 1810 (size_t)rl_completion_query_items, 1811 &rl_completion_type, &rl_attempted_completion_over, 1812 &rl_point, &rl_end); 1813 1814 1815} 1816 1817 1818/* ARGSUSED */ 1819static unsigned char 1820_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch) 1821{ 1822 return (unsigned char)rl_complete(0, ch); 1823} 1824 1825/* 1826 * misc other functions 1827 */ 1828 1829/* 1830 * bind key c to readline-type function func 1831 */ 1832int 1833rl_bind_key(int c, rl_command_func_t *func) 1834{ 1835 int retval = -1; 1836 1837 if (h == NULL || e == NULL) 1838 rl_initialize(); 1839 1840 if (func == rl_insert) { 1841 /* XXX notice there is no range checking of ``c'' */ 1842 e->el_map.key[c] = ED_INSERT; 1843 retval = 0; 1844 } 1845 return retval; 1846} 1847 1848 1849/* 1850 * read one key from input - handles chars pushed back 1851 * to input stream also 1852 */ 1853int 1854rl_read_key(void) 1855{ 1856 char fooarr[2 * sizeof(int)]; 1857 1858 if (e == NULL || h == NULL) 1859 rl_initialize(); 1860 1861 return el_getc(e, fooarr); 1862} 1863 1864 1865/* 1866 * reset the terminal 1867 */ 1868/* ARGSUSED */ 1869void 1870rl_reset_terminal(const char *p __attribute__((__unused__))) 1871{ 1872 1873 if (h == NULL || e == NULL) 1874 rl_initialize(); 1875 el_reset(e); 1876} 1877 1878 1879/* 1880 * insert character ``c'' back into input stream, ``count'' times 1881 */ 1882int 1883rl_insert(int count, int c) 1884{ 1885 char arr[2]; 1886 1887 if (h == NULL || e == NULL) 1888 rl_initialize(); 1889 1890 /* XXX - int -> char conversion can lose on multichars */ 1891 arr[0] = (char)c; 1892 arr[1] = '\0'; 1893 1894 for (; count > 0; count--) 1895 el_push(e, arr); 1896 1897 return 0; 1898} 1899 1900int 1901rl_insert_text(const char *text) 1902{ 1903 if (!text || *text == 0) 1904 return 0; 1905 1906 if (h == NULL || e == NULL) 1907 rl_initialize(); 1908 1909 if (el_insertstr(e, text) < 0) 1910 return 0; 1911 return (int)strlen(text); 1912} 1913 1914/*ARGSUSED*/ 1915int 1916rl_newline(int count __attribute__((__unused__)), 1917 int c __attribute__((__unused__))) 1918{ 1919 /* 1920 * Readline-4.0 appears to ignore the args. 1921 */ 1922 return rl_insert(1, '\n'); 1923} 1924 1925/*ARGSUSED*/ 1926static unsigned char 1927rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c) 1928{ 1929 if (map[c] == NULL) 1930 return CC_ERROR; 1931 1932 _rl_update_pos(); 1933 1934 (*map[c])(NULL, c); 1935 1936 /* If rl_done was set by the above call, deal with it here */ 1937 if (rl_done) 1938 return CC_EOF; 1939 1940 return CC_NORM; 1941} 1942 1943int 1944rl_add_defun(const char *name, Function *fun, int c) 1945{ 1946 char dest[8]; 1947 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0) 1948 return -1; 1949 map[(unsigned char)c] = fun; 1950 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper); 1951 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0); 1952 el_set(e, EL_BIND, dest, name, NULL); 1953 return 0; 1954} 1955 1956void 1957rl_callback_read_char(void) 1958{ 1959 int count = 0, done = 0; 1960 const char *buf = el_gets(e, &count); 1961 char *wbuf; 1962 1963 if (buf == NULL || count-- <= 0) { 1964 if (rl_linefunc != NULL && e->el_state.thiscmd == EL_EOF) 1965 (*(void (*)(const char *))rl_linefunc)(NULL); 1966 return; 1967 } 1968 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 1969 done = 1; 1970 if (buf[count] == '\n' || buf[count] == '\r') 1971 done = 2; 1972 1973 if (done && rl_linefunc != NULL) { 1974 el_set(e, EL_UNBUFFERED, 0); 1975 if (done == 2) { 1976 if ((wbuf = strdup(buf)) != NULL) 1977 wbuf[count] = '\0'; 1978 } else 1979 wbuf = NULL; 1980 (*(void (*)(const char *))rl_linefunc)(wbuf); 1981 //el_set(e, EL_UNBUFFERED, 1); 1982 } 1983} 1984 1985void 1986rl_callback_handler_install(const char *prompt, VCPFunction *linefunc) 1987{ 1988 if (e == NULL) { 1989 rl_initialize(); 1990 } 1991 (void)rl_set_prompt(prompt); 1992 rl_linefunc = linefunc; 1993 el_set(e, EL_UNBUFFERED, 1); 1994} 1995 1996void 1997rl_callback_handler_remove(void) 1998{ 1999 el_set(e, EL_UNBUFFERED, 0); 2000 rl_linefunc = NULL; 2001} 2002 2003void 2004rl_redisplay(void) 2005{ 2006 char a[2]; 2007 a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT]; 2008 a[1] = '\0'; 2009 el_push(e, a); 2010} 2011 2012int 2013rl_get_previous_history(int count, int key) 2014{ 2015 char a[2]; 2016 a[0] = (char)key; 2017 a[1] = '\0'; 2018 while (count--) 2019 el_push(e, a); 2020 return 0; 2021} 2022 2023void 2024/*ARGSUSED*/ 2025rl_prep_terminal(int meta_flag __attribute__((__unused__))) 2026{ 2027 el_set(e, EL_PREP_TERM, 1); 2028} 2029 2030void 2031rl_deprep_terminal(void) 2032{ 2033 el_set(e, EL_PREP_TERM, 0); 2034} 2035 2036int 2037rl_read_init_file(const char *s) 2038{ 2039 return el_source(e, s); 2040} 2041 2042int 2043rl_parse_and_bind(const char *line) 2044{ 2045 const char **argv; 2046 int argc; 2047 Tokenizer *tok; 2048 2049 tok = tok_init(NULL); 2050 tok_str(tok, line, &argc, &argv); 2051 argc = el_parse(e, argc, argv); 2052 tok_end(tok); 2053 return argc ? 1 : 0; 2054} 2055 2056int 2057rl_variable_bind(const char *var, const char *value) 2058{ 2059 /* 2060 * The proper return value is undocument, but this is what the 2061 * readline source seems to do. 2062 */ 2063 return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0; 2064} 2065 2066void 2067rl_stuff_char(int c) 2068{ 2069 char buf[2]; 2070 2071 buf[0] = (char)c; 2072 buf[1] = '\0'; 2073 el_insertstr(e, buf); 2074} 2075 2076static int 2077_rl_event_read_char(EditLine *el, char *cp) 2078{ 2079 int n; 2080 ssize_t num_read = 0; 2081 2082 *cp = '\0'; 2083 while (rl_event_hook) { 2084 2085 (*rl_event_hook)(); 2086 2087#if defined(FIONREAD) 2088 if (ioctl(el->el_infd, FIONREAD, &n) < 0) 2089 return -1; 2090 if (n) 2091 num_read = read(el->el_infd, cp, (size_t)1); 2092 else 2093 num_read = 0; 2094#elif defined(F_SETFL) && defined(O_NDELAY) 2095 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0) 2096 return -1; 2097 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0) 2098 return -1; 2099 num_read = read(el->el_infd, cp, 1); 2100 if (fcntl(el->el_infd, F_SETFL, n)) 2101 return -1; 2102#else 2103 /* not non-blocking, but what you gonna do? */ 2104 num_read = read(el->el_infd, cp, 1); 2105 return -1; 2106#endif 2107 2108 if (num_read < 0 && errno == EAGAIN) 2109 continue; 2110 if (num_read == 0) 2111 continue; 2112 break; 2113 } 2114 if (!rl_event_hook) 2115 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); 2116 return (int)num_read; 2117} 2118 2119static void 2120_rl_update_pos(void) 2121{ 2122 const LineInfo *li = el_line(e); 2123 2124 rl_point = (int)(li->cursor - li->buffer); 2125 rl_end = (int)(li->lastchar - li->buffer); 2126} 2127 2128void 2129rl_get_screen_size(int *rows, int *cols) 2130{ 2131 if (rows) 2132 el_get(e, EL_GETTC, "li", rows, NULL); 2133 if (cols) 2134 el_get(e, EL_GETTC, "co", cols, NULL); 2135} 2136 2137void 2138rl_set_screen_size(int rows, int cols) 2139{ 2140 char buf[64]; 2141 (void)snprintf(buf, sizeof(buf), "%d", rows); 2142 el_set(e, EL_SETTC, "li", buf, NULL); 2143 (void)snprintf(buf, sizeof(buf), "%d", cols); 2144 el_set(e, EL_SETTC, "co", buf, NULL); 2145} 2146 2147static int 2148_completion_cmp(const void *a, const void *b) 2149{ 2150 return strcmp(*(const char **)a, *(const char **)b); 2151} 2152 2153char ** 2154rl_completion_matches(const char *str, rl_compentry_func_t *fun) 2155{ 2156 size_t len, max, i, j, min; 2157 char **list, *match, *a, *b; 2158 2159 len = 1; 2160 max = 10; 2161 if ((list = el_malloc(max * sizeof(*list))) == NULL) 2162 return NULL; 2163 2164 while ((match = (*fun)(str, (int)(len - 1))) != NULL) { 2165 list[len++] = match; 2166 if (len == max) { 2167 char **nl; 2168 max += 10; 2169 if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL) 2170 goto out; 2171 list = nl; 2172 } 2173 } 2174 if (len == 1) 2175 goto out; 2176 list[len] = NULL; 2177 if (len == 2) { 2178 if ((list[0] = strdup(list[1])) == NULL) 2179 goto out; 2180 return list; 2181 } 2182 qsort(&list[1], len - 1, sizeof(*list), 2183 _completion_cmp); 2184 min = SIZE_T_MAX; 2185 for (i = 1, a = list[i]; i < len - 1; i++, a = b) { 2186 b = list[i + 1]; 2187 for (j = 0; a[j] && a[j] == b[j]; j++) 2188 continue; 2189 if (min > j) 2190 min = j; 2191 } 2192 if (min == 0 && *str) { 2193 if ((list[0] = strdup(str)) == NULL) 2194 goto out; 2195 } else { 2196 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL) 2197 goto out; 2198 (void)memcpy(list[0], list[1], min); 2199 list[0][min] = '\0'; 2200 } 2201 return list; 2202 2203out: 2204 el_free(list); 2205 return NULL; 2206} 2207 2208char * 2209rl_filename_completion_function (const char *text, int state) 2210{ 2211 return fn_filename_completion_function(text, state); 2212} 2213 2214void 2215rl_forced_update_display(void) 2216{ 2217 el_set(e, EL_REFRESH); 2218} 2219 2220int 2221_rl_abort_internal(void) 2222{ 2223 el_beep(e); 2224 longjmp(topbuf, 1); 2225 /*NOTREACHED*/ 2226} 2227 2228int 2229_rl_qsort_string_compare(char **s1, char **s2) 2230{ 2231 return strcoll(*s1, *s2); 2232} 2233 2234HISTORY_STATE * 2235history_get_history_state(void) 2236{ 2237 HISTORY_STATE *hs; 2238 2239 if ((hs = el_malloc(sizeof(*hs))) == NULL) 2240 return NULL; 2241 hs->length = history_length; 2242 return hs; 2243} 2244 2245int 2246/*ARGSUSED*/ 2247rl_kill_text(int from __attribute__((__unused__)), 2248 int to __attribute__((__unused__))) 2249{ 2250 return 0; 2251} 2252 2253Keymap 2254rl_make_bare_keymap(void) 2255{ 2256 return NULL; 2257} 2258 2259Keymap 2260rl_get_keymap(void) 2261{ 2262 return NULL; 2263} 2264 2265void 2266/*ARGSUSED*/ 2267rl_set_keymap(Keymap k __attribute__((__unused__))) 2268{ 2269} 2270 2271int 2272/*ARGSUSED*/ 2273rl_generic_bind(int type __attribute__((__unused__)), 2274 const char * keyseq __attribute__((__unused__)), 2275 const char * data __attribute__((__unused__)), 2276 Keymap k __attribute__((__unused__))) 2277{ 2278 return 0; 2279} 2280 2281int 2282/*ARGSUSED*/ 2283rl_bind_key_in_map(int key __attribute__((__unused__)), 2284 rl_command_func_t *fun __attribute__((__unused__)), 2285 Keymap k __attribute__((__unused__))) 2286{ 2287 return 0; 2288} 2289 2290/* unsupported, but needed by python */ 2291void 2292rl_cleanup_after_signal(void) 2293{ 2294} 2295 2296int 2297rl_on_new_line(void) 2298{ 2299 return 0; 2300} 2301 2302void 2303rl_free_line_state(void) 2304{ 2305} 2306