lib/libedit/src/readline.c

   1 /*      $NetBSD: readline.c,v 1.139 2016/10/28 18:32:26 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 1.139 2016/10/28 18:32:26 christos Exp $");
  35 #endif /* not lint && not SCCSID */
  36
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #include <ctype.h>
  40 #include <dirent.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <limits.h>
  44 #include <pwd.h>
  45 #include <setjmp.h>
  46 #include <stdint.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51 #include <vis.h>
  52
  53 #include "readline/readline.h"
  54 #include "el.h"
  55 #include "fcns.h"
  56 #include "filecomplete.h"
  57
  58 void rl_prep_terminal(int);
  59 void rl_deprep_terminal(void);
  60
  61 /* for rl_complete() */
  62 #define TAB             '\r'
  63
  64 /* see comment at the #ifdef for sense of this */
  65 /* #define GDB_411_HACK */
  66
  67 /* readline compatibility stuff - look at readline sources/documentation */
  68 /* to see what these variables mean */
  69 const char *rl_library_version = "EditLine wrapper";
  70 int rl_readline_version = RL_READLINE_VERSION;
  71 static char empty[] = { '\0' };
  72 static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
  73 static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
  74     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
  75 char *rl_readline_name = empty;
  76 FILE *rl_instream = NULL;
  77 FILE *rl_outstream = NULL;
  78 int rl_point = 0;
  79 int rl_end = 0;
  80 char *rl_line_buffer = NULL;
  81 rl_vcpfunc_t *rl_linefunc = NULL;
  82 int rl_done = 0;
  83 VFunction *rl_event_hook = NULL;
  84 KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
  85     emacs_meta_keymap,
  86     emacs_ctlx_keymap;
  87 /*
  88  * The following is not implemented; we always catch signals in the
  89  * libedit fashion: set handlers on entry to el_gets() and clear them
  90  * on the way out. This simplistic approach works for most cases; if
  91  * it does not work for your application, please let us know.
  92  */
  93 int rl_catch_signals = 1;
  94 int rl_catch_sigwinch = 1;
  95
  96 int history_base = 1;           /* probably never subject to change */
  97 int history_length = 0;
  98 int history_offset = 0;
  99 int max_input_history = 0;
 100 char history_expansion_char = '!';
 101 char history_subst_char = '^';
 102 char *history_no_expand_chars = expand_chars;
 103 Function *history_inhibit_expansion_function = NULL;
 104 char *history_arg_extract(int start, int end, const char *str);
 105
 106 int rl_inhibit_completion = 0;
 107 int rl_attempted_completion_over = 0;
 108 char *rl_basic_word_break_characters = break_chars;
 109 char *rl_completer_word_break_characters = NULL;
 110 char *rl_completer_quote_characters = NULL;
 111 rl_compentry_func_t *rl_completion_entry_function = NULL;
 112 char *(*rl_completion_word_break_hook)(void) = NULL;
 113 rl_completion_func_t *rl_attempted_completion_function = NULL;
 114 Function *rl_pre_input_hook = NULL;
 115 Function *rl_startup1_hook = NULL;
 116 int (*rl_getc_function)(FILE *) = NULL;
 117 char *rl_terminal_name = NULL;
 118 int rl_already_prompted = 0;
 119 int rl_filename_completion_desired = 0;
 120 int rl_ignore_completion_duplicates = 0;
 121 int readline_echoing_p = 1;
 122 int _rl_print_completions_horizontally = 0;
 123 VFunction *rl_redisplay_function = NULL;
 124 Function *rl_startup_hook = NULL;
 125 VFunction *rl_completion_display_matches_hook = NULL;
 126 VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
 127 VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
 128 KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
 129
 130 /*
 131  * The current prompt string.
 132  */
 133 char *rl_prompt = NULL;
 134 /*
 135  * This is set to character indicating type of completion being done by
 136  * rl_complete_internal(); this is available for application completion
 137  * functions.
 138  */
 139 int rl_completion_type = 0;
 140
 141 /*
 142  * If more than this number of items results from query for possible
 143  * completions, we ask user if they are sure to really display the list.
 144  */
 145 int rl_completion_query_items = 100;
 146
 147 /*
 148  * List of characters which are word break characters, but should be left
 149  * in the parsed text when it is passed to the completion function.
 150  * Shell uses this to help determine what kind of completing to do.
 151  */
 152 char *rl_special_prefixes = NULL;
 153
 154 /*
 155  * This is the character appended to the completed words if at the end of
 156  * the line. Default is ' ' (a space).
 157  */
 158 int rl_completion_append_character = ' ';
 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 rl_command_func_t *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 int               _history_expand_command(const char *, size_t, size_t,
 173     char **);
 174 static char             *_rl_compat_sub(const char *, const char *,
 175     const char *, int);
 176 static int               _rl_event_read_char(EditLine *, wchar_t *);
 177 static void              _rl_update_pos(void);
 178
 179 static HIST_ENTRY rl_he;
 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  * read one key from user defined input function
 192  */
 193 static int
 194 /*ARGSUSED*/
 195 _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c)
 196 {
 197         int i;
 198
 199         i = (*rl_getc_function)(rl_instream);
 200         if (i == -1)
 201                 return 0;
 202         *c = (wchar_t)i;
 203         return 1;
 204 }
 205
 206 static void
 207 _resize_fun(EditLine *el, void *a)
 208 {
 209         const LineInfo *li;
 210         char **ap = a;
 211
 212         li = el_line(el);
 213         /* a cheesy way to get rid of const cast. */
 214         *ap = memchr(li->buffer, *li->buffer, (size_t)1);
 215 }
 216
 217 static const char *
 218 _default_history_file(void)
 219 {
 220         struct passwd *p;
 221         static char *path;
 222         size_t len;
 223
 224         if (path)
 225                 return path;
 226
 227         if ((p = getpwuid(getuid())) == NULL)
 228                 return NULL;
 229
 230         len = strlen(p->pw_dir) + sizeof("/.history");
 231         if ((path = malloc(len)) == NULL)
 232                 return NULL;
 233
 234         (void)snprintf(path, len, "%s/.history", p->pw_dir);
 235         return path;
 236 }
 237
 238 /*
 239  * READLINE compatibility stuff
 240  */
 241
 242 /*
 243  * Set the prompt
 244  */
 245 int
 246 rl_set_prompt(const char *prompt)
 247 {
 248         char *p;
 249
 250         if (!prompt)
 251                 prompt = "";
 252         if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
 253                 return 0;
 254         if (rl_prompt)
 255                 el_free(rl_prompt);
 256         rl_prompt = strdup(prompt);
 257         if (rl_prompt == NULL)
 258                 return -1;
 259
 260         while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
 261                 *p = RL_PROMPT_START_IGNORE;
 262
 263         return 0;
 264 }
 265
 266 /*
 267  * initialize rl compat stuff
 268  */
 269 int
 270 rl_initialize(void)
 271 {
 272         HistEvent ev;
 273         int editmode = 1;
 274         struct termios t;
 275
 276         if (e != NULL)
 277                 el_end(e);
 278         if (h != NULL)
 279                 history_end(h);
 280
 281         if (!rl_instream)
 282                 rl_instream = stdin;
 283         if (!rl_outstream)
 284                 rl_outstream = stdout;
 285
 286         /*
 287          * See if we don't really want to run the editor
 288          */
 289         if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
 290                 editmode = 0;
 291
 292         e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
 293
 294         if (!editmode)
 295                 el_set(e, EL_EDITMODE, 0);
 296
 297         h = history_init();
 298         if (!e || !h)
 299                 return -1;
 300
 301         history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
 302         history_length = 0;
 303         max_input_history = INT_MAX;
 304         el_set(e, EL_HIST, history, h);
 305
 306         /* Setup resize function */
 307         el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
 308
 309         /* setup getc function if valid */
 310         if (rl_getc_function)
 311                 el_set(e, EL_GETCFN, _getc_function);
 312
 313         /* for proper prompt printing in readline() */
 314         if (rl_set_prompt("") == -1) {
 315                 history_end(h);
 316                 el_end(e);
 317                 return -1;
 318         }
 319         el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
 320         el_set(e, EL_SIGNAL, rl_catch_signals);
 321
 322         /* set default mode to "emacs"-style and read setting afterwards */
 323         /* so this can be overridden */
 324         el_set(e, EL_EDITOR, "emacs");
 325         if (rl_terminal_name != NULL)
 326                 el_set(e, EL_TERMINAL, rl_terminal_name);
 327         else
 328                 el_get(e, EL_TERMINAL, &rl_terminal_name);
 329
 330         /*
 331          * Word completion - this has to go AFTER rebinding keys
 332          * to emacs-style.
 333          */
 334         el_set(e, EL_ADDFN, "rl_complete",
 335             "ReadLine compatible completion function",
 336             _el_rl_complete);
 337         el_set(e, EL_BIND, "^I", "rl_complete", NULL);
 338
 339         /*
 340          * Send TSTP when ^Z is pressed.
 341          */
 342         el_set(e, EL_ADDFN, "rl_tstp",
 343             "ReadLine compatible suspend function",
 344             _el_rl_tstp);
 345         el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
 346
 347         /*
 348          * Set some readline compatible key-bindings.
 349          */
 350         el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL);
 351
 352         /*
 353          * Allow the use of Home/End keys.
 354          */
 355         el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL);
 356         el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL);
 357         el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL);
 358         el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL);
 359         el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL);
 360         el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL);
 361
 362         /*
 363          * Allow the use of the Delete/Insert keys.
 364          */
 365         el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL);
 366         el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL);
 367
 368         /*
 369          * Ctrl-left-arrow and Ctrl-right-arrow for word moving.
 370          */
 371         el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL);
 372         el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL);
 373         el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL);
 374         el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL);
 375         el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL);
 376         el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL);
 377
 378         /* read settings from configuration file */
 379         el_source(e, NULL);
 380
 381         /*
 382          * Unfortunately, some applications really do use rl_point
 383          * and rl_line_buffer directly.
 384          */
 385         _resize_fun(e, &rl_line_buffer);
 386         _rl_update_pos();
 387
 388         if (rl_startup_hook)
 389                 (*rl_startup_hook)(NULL, 0);
 390
 391         return 0;
 392 }
 393
 394
 395 /*
 396  * read one line from input stream and return it, chomping
 397  * trailing newline (if there is any)
 398  */
 399 char *
 400 readline(const char *p)
 401 {
 402         HistEvent ev;
 403         const char * volatile prompt = p;
 404         int count;
 405         const char *ret;
 406         char *buf;
 407         static int used_event_hook;
 408
 409         if (e == NULL || h == NULL)
 410                 rl_initialize();
 411
 412         rl_done = 0;
 413
 414         (void)setjmp(topbuf);
 415
 416         /* update prompt accordingly to what has been passed */
 417         if (rl_set_prompt(prompt) == -1)
 418                 return NULL;
 419
 420         if (rl_pre_input_hook)
 421                 (*rl_pre_input_hook)(NULL, 0);
 422
 423         if (rl_event_hook && !(e->el_flags&NO_TTY)) {
 424                 el_set(e, EL_GETCFN, _rl_event_read_char);
 425                 used_event_hook = 1;
 426         }
 427
 428         if (!rl_event_hook && used_event_hook) {
 429                 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
 430                 used_event_hook = 0;
 431         }
 432
 433         rl_already_prompted = 0;
 434
 435         /* get one line from input stream */
 436         ret = el_gets(e, &count);
 437
 438         if (ret && count > 0) {
 439                 int lastidx;
 440
 441                 buf = strdup(ret);
 442                 if (buf == NULL)
 443                         return NULL;
 444                 lastidx = count - 1;
 445                 if (buf[lastidx] == '\n')
 446                         buf[lastidx] = '\0';
 447         } else
 448                 buf = NULL;
 449
 450         history(h, &ev, H_GETSIZE);
 451         history_length = ev.num;
 452
 453         return buf;
 454 }
 455
 456 /*
 457  * history functions
 458  */
 459
 460 /*
 461  * is normally called before application starts to use
 462  * history expansion functions
 463  */
 464 void
 465 using_history(void)
 466 {
 467         if (h == NULL || e == NULL)
 468                 rl_initialize();
 469         history_offset = history_length;
 470 }
 471
 472
 473 /*
 474  * substitute ``what'' with ``with'', returning resulting string; if
 475  * globally == 1, substitutes all occurrences of what, otherwise only the
 476  * first one
 477  */
 478 static char *
 479 _rl_compat_sub(const char *str, const char *what, const char *with,
 480     int globally)
 481 {
 482         const   char    *s;
 483         char    *r, *result;
 484         size_t  len, with_len, what_len;
 485
 486         len = strlen(str);
 487         with_len = strlen(with);
 488         what_len = strlen(what);
 489
 490         /* calculate length we need for result */
 491         s = str;
 492         while (*s) {
 493                 if (*s == *what && !strncmp(s, what, what_len)) {
 494                         len += with_len - what_len;
 495                         if (!globally)
 496                                 break;
 497                         s += what_len;
 498                 } else
 499                         s++;
 500         }
 501         r = result = el_malloc((len + 1) * sizeof(*r));
 502         if (result == NULL)
 503                 return NULL;
 504         s = str;
 505         while (*s) {
 506                 if (*s == *what && !strncmp(s, what, what_len)) {
 507                         (void)strncpy(r, with, with_len);
 508                         r += with_len;
 509                         s += what_len;
 510                         if (!globally) {
 511                                 (void)strcpy(r, s);
 512                                 return result;
 513                         }
 514                 } else
 515                         *r++ = *s++;
 516         }
 517         *r = '\0';
 518         return result;
 519 }
 520
 521 static  char    *last_search_pat;       /* last !?pat[?] search pattern */
 522 static  char    *last_search_match;     /* last !?pat[?] that matched */
 523
 524 const char *
 525 get_history_event(const char *cmd, int *cindex, int qchar)
 526 {
 527         int idx, sign, sub, num, begin, ret;
 528         size_t len;
 529         char    *pat;
 530         const char *rptr;
 531         HistEvent ev;
 532
 533         idx = *cindex;
 534         if (cmd[idx++] != history_expansion_char)
 535                 return NULL;
 536
 537         /* find out which event to take */
 538         if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
 539                 if (history(h, &ev, H_FIRST) != 0)
 540                         return NULL;
 541                 *cindex = cmd[idx]? (idx + 1):idx;
 542                 return ev.str;
 543         }
 544         sign = 0;
 545         if (cmd[idx] == '-') {
 546                 sign = 1;
 547                 idx++;
 548         }
 549
 550         if ('0' <= cmd[idx] && cmd[idx] <= '9') {
 551                 HIST_ENTRY *he;
 552
 553                 num = 0;
 554                 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
 555                         num = num * 10 + cmd[idx] - '0';
 556                         idx++;
 557                 }
 558                 if (sign)
 559                         num = history_length - num + 1;
 560
 561                 if (!(he = history_get(num)))
 562                         return NULL;
 563
 564                 *cindex = idx;
 565                 return he->line;
 566         }
 567         sub = 0;
 568         if (cmd[idx] == '?') {
 569                 sub = 1;
 570                 idx++;
 571         }
 572         begin = idx;
 573         while (cmd[idx]) {
 574                 if (cmd[idx] == '\n')
 575                         break;
 576                 if (sub && cmd[idx] == '?')
 577                         break;
 578                 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
 579                                     || cmd[idx] == '\t' || cmd[idx] == qchar))
 580                         break;
 581                 idx++;
 582         }
 583         len = (size_t)idx - (size_t)begin;
 584         if (sub && cmd[idx] == '?')
 585                 idx++;
 586         if (sub && len == 0 && last_search_pat && *last_search_pat)
 587                 pat = last_search_pat;
 588         else if (len == 0)
 589                 return NULL;
 590         else {
 591                 if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL)
 592                         return NULL;
 593                 (void)strncpy(pat, cmd + begin, len);
 594                 pat[len] = '\0';
 595         }
 596
 597         if (history(h, &ev, H_CURR) != 0) {
 598                 if (pat != last_search_pat)
 599                         el_free(pat);
 600                 return NULL;
 601         }
 602         num = ev.num;
 603
 604         if (sub) {
 605                 if (pat != last_search_pat) {
 606                         if (last_search_pat)
 607                                 el_free(last_search_pat);
 608                         last_search_pat = pat;
 609                 }
 610                 ret = history_search(pat, -1);
 611         } else
 612                 ret = history_search_prefix(pat, -1);
 613
 614         if (ret == -1) {
 615                 /* restore to end of list on failed search */
 616                 history(h, &ev, H_FIRST);
 617                 (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
 618                 if (pat != last_search_pat)
 619                         el_free(pat);
 620                 return NULL;
 621         }
 622
 623         if (sub && len) {
 624                 if (last_search_match && last_search_match != pat)
 625                         el_free(last_search_match);
 626                 last_search_match = pat;
 627         }
 628
 629         if (pat != last_search_pat)
 630                 el_free(pat);
 631
 632         if (history(h, &ev, H_CURR) != 0)
 633                 return NULL;
 634         *cindex = idx;
 635         rptr = ev.str;
 636
 637         /* roll back to original position */
 638         (void)history(h, &ev, H_SET, num);
 639
 640         return rptr;
 641 }
 642
 643 /*
 644  * the real function doing history expansion - takes as argument command
 645  * to do and data upon which the command should be executed
 646  * does expansion the way I've understood readline documentation
 647  *
 648  * returns 0 if data was not modified, 1 if it was and 2 if the string
 649  * should be only printed and not executed; in case of error,
 650  * returns -1 and *result points to NULL
 651  * it's the caller's responsibility to free() the string returned in *result
 652  */
 653 static int
 654 _history_expand_command(const char *command, size_t offs, size_t cmdlen,
 655     char **result)
 656 {
 657         char *tmp, *search = NULL, *aptr;
 658         const char *ptr, *cmd;
 659         static char *from = NULL, *to = NULL;
 660         int start, end, idx, has_mods = 0;
 661         int p_on = 0, g_on = 0;
 662
 663         *result = NULL;
 664         aptr = NULL;
 665         ptr = NULL;
 666
 667         /* First get event specifier */
 668         idx = 0;
 669
 670         if (strchr(":^*$", command[offs + 1])) {
 671                 char str[4];
 672                 /*
 673                 * "!:" is shorthand for "!!:".
 674                 * "!^", "!*" and "!$" are shorthand for
 675                 * "!!:^", "!!:*" and "!!:$" respectively.
 676                 */
 677                 str[0] = str[1] = '!';
 678                 str[2] = '0';
 679                 ptr = get_history_event(str, &idx, 0);
 680                 idx = (command[offs + 1] == ':')? 1:0;
 681                 has_mods = 1;
 682         } else {
 683                 if (command[offs + 1] == '#') {
 684                         /* use command so far */
 685                         if ((aptr = el_malloc((offs + 1) * sizeof(*aptr)))
 686                             == NULL)
 687                                 return -1;
 688                         (void)strncpy(aptr, command, offs);
 689                         aptr[offs] = '\0';
 690                         idx = 1;
 691                 } else {
 692                         int     qchar;
 693
 694                         qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
 695                         ptr = get_history_event(command + offs, &idx, qchar);
 696                 }
 697                 has_mods = command[offs + (size_t)idx] == ':';
 698         }
 699
 700         if (ptr == NULL && aptr == NULL)
 701                 return -1;
 702
 703         if (!has_mods) {
 704                 *result = strdup(aptr ? aptr : ptr);
 705                 if (aptr)
 706                         el_free(aptr);
 707                 if (*result == NULL)
 708                         return -1;
 709                 return 1;
 710         }
 711
 712         cmd = command + offs + idx + 1;
 713
 714         /* Now parse any word designators */
 715
 716         if (*cmd == '%')        /* last word matched by ?pat? */
 717                 tmp = strdup(last_search_match? last_search_match:"");
 718         else if (strchr("^*$-0123456789", *cmd)) {
 719                 start = end = -1;
 720                 if (*cmd == '^')
 721                         start = end = 1, cmd++;
 722                 else if (*cmd == '$')
 723                         start = -1, cmd++;
 724                 else if (*cmd == '*')
 725                         start = 1, cmd++;
 726                else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
 727                         start = 0;
 728                         while (*cmd && '0' <= *cmd && *cmd <= '9')
 729                                 start = start * 10 + *cmd++ - '0';
 730
 731                         if (*cmd == '-') {
 732                                 if (isdigit((unsigned char) cmd[1])) {
 733                                         cmd++;
 734                                         end = 0;
 735                                         while (*cmd && '0' <= *cmd && *cmd <= '9')
 736                                                 end = end * 10 + *cmd++ - '0';
 737                                 } else if (cmd[1] == '$') {
 738                                         cmd += 2;
 739                                         end = -1;
 740                                 } else {
 741                                         cmd++;
 742                                         end = -2;
 743                                 }
 744                         } else if (*cmd == '*')
 745                                 end = -1, cmd++;
 746                         else
 747                                 end = start;
 748                 }
 749                 tmp = history_arg_extract(start, end, aptr? aptr:ptr);
 750                 if (tmp == NULL) {
 751                         (void)fprintf(rl_outstream, "%s: Bad word specifier",
 752                             command + offs + idx);
 753                         if (aptr)
 754                                 el_free(aptr);
 755                         return -1;
 756                 }
 757         } else
 758                 tmp = strdup(aptr? aptr:ptr);
 759
 760         if (aptr)
 761                 el_free(aptr);
 762
 763         if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
 764                 *result = tmp;
 765                 return 1;
 766         }
 767
 768         for (; *cmd; cmd++) {
 769                 if (*cmd == ':')
 770                         continue;
 771                 else if (*cmd == 'h') {         /* remove trailing path */
 772                         if ((aptr = strrchr(tmp, '/')) != NULL)
 773                                 *aptr = '\0';
 774                 } else if (*cmd == 't') {       /* remove leading path */
 775                         if ((aptr = strrchr(tmp, '/')) != NULL) {
 776                                 aptr = strdup(aptr + 1);
 777                                 el_free(tmp);
 778                                 tmp = aptr;
 779                         }
 780                 } else if (*cmd == 'r') {       /* remove trailing suffix */
 781                         if ((aptr = strrchr(tmp, '.')) != NULL)
 782                                 *aptr = '\0';
 783                 } else if (*cmd == 'e') {       /* remove all but suffix */
 784                         if ((aptr = strrchr(tmp, '.')) != NULL) {
 785                                 aptr = strdup(aptr);
 786                                 el_free(tmp);
 787                                 tmp = aptr;
 788                         }
 789                 } else if (*cmd == 'p')         /* print only */
 790                         p_on = 1;
 791                 else if (*cmd == 'g')
 792                         g_on = 2;
 793                 else if (*cmd == 's' || *cmd == '&') {
 794                         char *what, *with, delim;
 795                         size_t len, from_len;
 796                         size_t size;
 797
 798                         if (*cmd == '&' && (from == NULL || to == NULL))
 799                                 continue;
 800                         else if (*cmd == 's') {
 801                                 delim = *(++cmd), cmd++;
 802                                 size = 16;
 803                                 what = el_realloc(from, size * sizeof(*what));
 804                                 if (what == NULL) {
 805                                         el_free(from);
 806                                         el_free(tmp);
 807                                         return 0;
 808                                 }
 809                                 len = 0;
 810                                 for (; *cmd && *cmd != delim; cmd++) {
 811                                         if (*cmd == '\\' && cmd[1] == delim)
 812                                                 cmd++;
 813                                         if (len >= size) {
 814                                                 char *nwhat;
 815                                                 nwhat = el_realloc(what,
 816                                                     (size <<= 1) *
 817                                                     sizeof(*nwhat));
 818                                                 if (nwhat == NULL) {
 819                                                         el_free(what);
 820                                                         el_free(tmp);
 821                                                         return 0;
 822                                                 }
 823                                                 what = nwhat;
 824                                         }
 825                                         what[len++] = *cmd;
 826                                 }
 827                                 what[len] = '\0';
 828                                 from = what;
 829                                 if (*what == '\0') {
 830                                         el_free(what);
 831                                         if (search) {
 832                                                 from = strdup(search);
 833                                                 if (from == NULL) {
 834                                                         el_free(tmp);
 835                                                         return 0;
 836                                                 }
 837                                         } else {
 838                                                 from = NULL;
 839                                                 el_free(tmp);
 840                                                 return -1;
 841                                         }
 842                                 }
 843                                 cmd++;  /* shift after delim */
 844                                 if (!*cmd)
 845                                         continue;
 846
 847                                 size = 16;
 848                                 with = el_realloc(to, size * sizeof(*with));
 849                                 if (with == NULL) {
 850                                         el_free(to);
 851                                         el_free(tmp);
 852                                         return -1;
 853                                 }
 854                                 len = 0;
 855                                 from_len = strlen(from);
 856                                 for (; *cmd && *cmd != delim; cmd++) {
 857                                         if (len + from_len + 1 >= size) {
 858                                                 char *nwith;
 859                                                 size += from_len + 1;
 860                                                 nwith = el_realloc(with,
 861                                                     size * sizeof(*nwith));
 862                                                 if (nwith == NULL) {
 863                                                         el_free(with);
 864                                                         el_free(tmp);
 865                                                         return -1;
 866                                                 }
 867                                                 with = nwith;
 868                                         }
 869                                         if (*cmd == '&') {
 870                                                 /* safe */
 871                                                 (void)strcpy(&with[len], from);
 872                                                 len += from_len;
 873                                                 continue;
 874                                         }
 875                                         if (*cmd == '\\'
 876                                             && (*(cmd + 1) == delim
 877                                                 || *(cmd + 1) == '&'))
 878                                                 cmd++;
 879                                         with[len++] = *cmd;
 880                                 }
 881                                 with[len] = '\0';
 882                                 to = with;
 883                         }
 884
 885                         aptr = _rl_compat_sub(tmp, from, to, g_on);
 886                         if (aptr) {
 887                                 el_free(tmp);
 888                                 tmp = aptr;
 889                         }
 890                         g_on = 0;
 891                 }
 892         }
 893         *result = tmp;
 894         return p_on? 2:1;
 895 }
 896
 897
 898 /*
 899  * csh-style history expansion
 900  */
 901 int
 902 history_expand(char *str, char **output)
 903 {
 904         int ret = 0;
 905         size_t idx, i, size;
 906         char *tmp, *result;
 907
 908         if (h == NULL || e == NULL)
 909                 rl_initialize();
 910
 911         if (history_expansion_char == 0) {
 912                 *output = strdup(str);
 913                 return 0;
 914         }
 915
 916         *output = NULL;
 917         if (str[0] == history_subst_char) {
 918                 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
 919                 *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output));
 920                 if (*output == NULL)
 921                         return 0;
 922                 (*output)[0] = (*output)[1] = history_expansion_char;
 923                 (*output)[2] = ':';
 924                 (*output)[3] = 's';
 925                 (void)strcpy((*output) + 4, str);
 926                 str = *output;
 927         } else {
 928                 *output = strdup(str);
 929                 if (*output == NULL)
 930                         return 0;
 931         }
 932
 933 #define ADD_STRING(what, len, fr)                                       \
 934         {                                                               \
 935                 if (idx + len + 1 > size) {                             \
 936                         char *nresult = el_realloc(result,              \
 937                             (size += len + 1) * sizeof(*nresult));      \
 938                         if (nresult == NULL) {                          \
 939                                 el_free(*output);                       \
 940                                 if (/*CONSTCOND*/fr)                    \
 941                                         el_free(tmp);                   \
 942                                 return 0;                               \
 943                         }                                               \
 944                         result = nresult;                               \
 945                 }                                                       \
 946                 (void)strncpy(&result[idx], what, len);                 \
 947                 idx += len;                                             \
 948                 result[idx] = '\0';                                     \
 949         }
 950
 951         result = NULL;
 952         size = idx = 0;
 953         tmp = NULL;
 954         for (i = 0; str[i];) {
 955                 int qchar, loop_again;
 956                 size_t len, start, j;
 957
 958                 qchar = 0;
 959                 loop_again = 1;
 960                 start = j = i;
 961 loop:
 962                 for (; str[j]; j++) {
 963                         if (str[j] == '\\' &&
 964                             str[j + 1] == history_expansion_char) {
 965                                 len = strlen(&str[j + 1]) + 1;
 966                                 memmove(&str[j], &str[j + 1], len);
 967                                 continue;
 968                         }
 969                         if (!loop_again) {
 970                                 if (isspace((unsigned char) str[j])
 971                                     || str[j] == qchar)
 972                                         break;
 973                         }
 974                         if (str[j] == history_expansion_char
 975                             && !strchr(history_no_expand_chars, str[j + 1])
 976                             && (!history_inhibit_expansion_function ||
 977                             (*history_inhibit_expansion_function)(str,
 978                             (int)j) == 0))
 979                                 break;
 980                 }
 981
 982                 if (str[j] && loop_again) {
 983                         i = j;
 984                         qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
 985                         j++;
 986                         if (str[j] == history_expansion_char)
 987                                 j++;
 988                         loop_again = 0;
 989                         goto loop;
 990                 }
 991                 len = i - start;
 992                 ADD_STRING(&str[start], len, 0);
 993
 994                 if (str[i] == '\0' || str[i] != history_expansion_char) {
 995                         len = j - i;
 996                         ADD_STRING(&str[i], len, 0);
 997                         if (start == 0)
 998                                 ret = 0;
 999                         else
1000                                 ret = 1;
1001                         break;
1002                 }
1003                 ret = _history_expand_command (str, i, (j - i), &tmp);
1004                 if (ret > 0 && tmp) {
1005                         len = strlen(tmp);
1006                         ADD_STRING(tmp, len, 1);
1007                 }
1008                 if (tmp) {
1009                         el_free(tmp);
1010                         tmp = NULL;
1011                 }
1012                 i = j;
1013         }
1014
1015         /* ret is 2 for "print only" option */
1016         if (ret == 2) {
1017                 add_history(result);
1018 #ifdef GDB_411_HACK
1019                 /* gdb 4.11 has been shipped with readline, where */
1020                 /* history_expand() returned -1 when the line     */
1021                 /* should not be executed; in readline 2.1+       */
1022                 /* it should return 2 in such a case              */
1023                 ret = -1;
1024 #endif
1025         }
1026         el_free(*output);
1027         *output = result;
1028
1029         return ret;
1030 }
1031
1032 /*
1033 * Return a string consisting of arguments of "str" from "start" to "end".
1034 */
1035 char *
1036 history_arg_extract(int start, int end, const char *str)
1037 {
1038         size_t  i, len, max;
1039         char    **arr, *result = NULL;
1040
1041         arr = history_tokenize(str);
1042         if (!arr)
1043                 return NULL;
1044         if (arr && *arr == NULL)
1045                 goto out;
1046
1047         for (max = 0; arr[max]; max++)
1048                 continue;
1049         max--;
1050
1051         if (start == '$')
1052                 start = (int)max;
1053         if (end == '$')
1054                 end = (int)max;
1055         if (end < 0)
1056                 end = (int)max + end + 1;
1057         if (start < 0)
1058                 start = end;
1059
1060         if (start < 0 || end < 0 || (size_t)start > max ||
1061             (size_t)end > max || start > end)
1062                 goto out;
1063
1064         for (i = (size_t)start, len = 0; i <= (size_t)end; i++)
1065                 len += strlen(arr[i]) + 1;
1066         len++;
1067         result = el_malloc(len * sizeof(*result));
1068         if (result == NULL)
1069                 goto out;
1070
1071         for (i = (size_t)start, len = 0; i <= (size_t)end; i++) {
1072                 (void)strcpy(result + len, arr[i]);
1073                 len += strlen(arr[i]);
1074                 if (i < (size_t)end)
1075                         result[len++] = ' ';
1076         }
1077         result[len] = '\0';
1078
1079 out:
1080         for (i = 0; arr[i]; i++)
1081                 el_free(arr[i]);
1082         el_free(arr);
1083
1084         return result;
1085 }
1086
1087 /*
1088  * Parse the string into individual tokens,
1089  * similar to how shell would do it.
1090  */
1091 char **
1092 history_tokenize(const char *str)
1093 {
1094         int size = 1, idx = 0, i, start;
1095         size_t len;
1096         char **result = NULL, *temp, delim = '\0';
1097
1098         for (i = 0; str[i];) {
1099                 while (isspace((unsigned char) str[i]))
1100                         i++;
1101                 start = i;
1102                 for (; str[i];) {
1103                         if (str[i] == '\\') {
1104                                 if (str[i+1] != '\0')
1105                                         i++;
1106                         } else if (str[i] == delim)
1107                                 delim = '\0';
1108                         else if (!delim &&
1109                                     (isspace((unsigned char) str[i]) ||
1110                                 strchr("()<>;&|$", str[i])))
1111                                 break;
1112                         else if (!delim && strchr("'`\"", str[i]))
1113                                 delim = str[i];
1114                         if (str[i])
1115                                 i++;
1116                 }
1117
1118                 if (idx + 2 >= size) {
1119                         char **nresult;
1120                         size <<= 1;
1121                         nresult = el_realloc(result, (size_t)size * sizeof(*nresult));
1122                         if (nresult == NULL) {
1123                                 el_free(result);
1124                                 return NULL;
1125                         }
1126                         result = nresult;
1127                 }
1128                 len = (size_t)i - (size_t)start;
1129                 temp = el_malloc((size_t)(len + 1) * sizeof(*temp));
1130                 if (temp == NULL) {
1131                         for (i = 0; i < idx; i++)
1132                                 el_free(result[i]);
1133                         el_free(result);
1134                         return NULL;
1135                 }
1136                 (void)strncpy(temp, &str[start], len);
1137                 temp[len] = '\0';
1138                 result[idx++] = temp;
1139                 result[idx] = NULL;
1140                 if (str[i])
1141                         i++;
1142         }
1143         return result;
1144 }
1145
1146
1147 /*
1148  * limit size of history record to ``max'' events
1149  */
1150 void
1151 stifle_history(int max)
1152 {
1153         HistEvent ev;
1154         HIST_ENTRY *he;
1155
1156         if (h == NULL || e == NULL)
1157                 rl_initialize();
1158
1159         if (history(h, &ev, H_SETSIZE, max) == 0) {
1160                 max_input_history = max;
1161                 if (history_length > max)
1162                         history_base = history_length - max;
1163                 while (history_length > max) {
1164                         he = remove_history(0);
1165                         el_free(he->data);
1166                         el_free((void *)(unsigned long)he->line);
1167                         el_free(he);
1168                 }
1169         }
1170 }
1171
1172
1173 /*
1174  * "unlimit" size of history - set the limit to maximum allowed int value
1175  */
1176 int
1177 unstifle_history(void)
1178 {
1179         HistEvent ev;
1180         int omax;
1181
1182         history(h, &ev, H_SETSIZE, INT_MAX);
1183         omax = max_input_history;
1184         max_input_history = INT_MAX;
1185         return omax;            /* some value _must_ be returned */
1186 }
1187
1188
1189 int
1190 history_is_stifled(void)
1191 {
1192
1193         /* cannot return true answer */
1194         return max_input_history != INT_MAX;
1195 }
1196
1197 static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
1198
1199 int
1200 history_truncate_file (const char *filename, int nlines)
1201 {
1202         int ret = 0;
1203         FILE *fp, *tp;
1204         char template[sizeof(_history_tmp_template)];
1205         char buf[4096];
1206         int fd;
1207         char *cp;
1208         off_t off;
1209         int count = 0;
1210         ssize_t left = 0;
1211
1212         if (filename == NULL && (filename = _default_history_file()) == NULL)
1213                 return errno;
1214         if ((fp = fopen(filename, "r+")) == NULL)
1215                 return errno;
1216         strcpy(template, _history_tmp_template);
1217         if ((fd = mkstemp(template)) == -1) {
1218                 ret = errno;
1219                 goto out1;
1220         }
1221
1222         if ((tp = fdopen(fd, "r+")) == NULL) {
1223                 close(fd);
1224                 ret = errno;
1225                 goto out2;
1226         }
1227
1228         for(;;) {
1229                 if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) {
1230                         if (ferror(fp)) {
1231                                 ret = errno;
1232                                 break;
1233                         }
1234                         if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
1235                             (off_t)-1) {
1236                                 ret = errno;
1237                                 break;
1238                         }
1239                         left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp);
1240                         if (ferror(fp)) {
1241                                 ret = errno;
1242                                 break;
1243                         }
1244                         if (left == 0) {
1245                                 count--;
1246                                 left = sizeof(buf);
1247                         } else if (fwrite(buf, (size_t)left, (size_t)1, tp)
1248                             != 1) {
1249                                 ret = errno;
1250                                 break;
1251                         }
1252                         fflush(tp);
1253                         break;
1254                 }
1255                 if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) {
1256                         ret = errno;
1257                         break;
1258                 }
1259                 count++;
1260         }
1261         if (ret)
1262                 goto out3;
1263         cp = buf + left - 1;
1264         if(*cp != '\n')
1265                 cp++;
1266         for(;;) {
1267                 while (--cp >= buf) {
1268                         if (*cp == '\n') {
1269                                 if (--nlines == 0) {
1270                                         if (++cp >= buf + sizeof(buf)) {
1271                                                 count++;
1272                                                 cp = buf;
1273                                         }
1274                                         break;
1275                                 }
1276                         }
1277                 }
1278                 if (nlines <= 0 || count == 0)
1279                         break;
1280                 count--;
1281                 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
1282                         ret = errno;
1283                         break;
1284                 }
1285                 if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) {
1286                         if (ferror(tp)) {
1287                                 ret = errno;
1288                                 break;
1289                         }
1290                         ret = EAGAIN;
1291                         break;
1292                 }
1293                 cp = buf + sizeof(buf);
1294         }
1295
1296         if (ret || nlines > 0)
1297                 goto out3;
1298
1299         if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) {
1300                 ret = errno;
1301                 goto out3;
1302         }
1303
1304         if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
1305             (off_t)-1) {
1306                 ret = errno;
1307                 goto out3;
1308         }
1309
1310         for(;;) {
1311                 if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) {
1312                         if (ferror(fp))
1313                                 ret = errno;
1314                         break;
1315                 }
1316                 if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) {
1317                         ret = errno;
1318                         break;
1319                 }
1320         }
1321         fflush(fp);
1322         if((off = ftello(fp)) > 0)
1323                 (void)ftruncate(fileno(fp), off);
1324 out3:
1325         fclose(tp);
1326 out2:
1327         unlink(template);
1328 out1:
1329         fclose(fp);
1330
1331         return ret;
1332 }
1333
1334
1335 /*
1336  * read history from a file given
1337  */
1338 int
1339 read_history(const char *filename)
1340 {
1341         HistEvent ev;
1342
1343         if (h == NULL || e == NULL)
1344                 rl_initialize();
1345         if (filename == NULL && (filename = _default_history_file()) == NULL)
1346                 return errno;
1347         return history(h, &ev, H_LOAD, filename) == -1 ?
1348             (errno ? errno : EINVAL) : 0;
1349 }
1350
1351
1352 /*
1353  * write history to a file given
1354  */
1355 int
1356 write_history(const char *filename)
1357 {
1358         HistEvent ev;
1359
1360         if (h == NULL || e == NULL)
1361                 rl_initialize();
1362         if (filename == NULL && (filename = _default_history_file()) == NULL)
1363                 return errno;
1364         return history(h, &ev, H_SAVE, filename) == -1 ?
1365             (errno ? errno : EINVAL) : 0;
1366 }
1367
1368
1369 /*
1370  * returns history ``num''th event
1371  *
1372  * returned pointer points to static variable
1373  */
1374 HIST_ENTRY *
1375 history_get(int num)
1376 {
1377         static HIST_ENTRY she;
1378         HistEvent ev;
1379         int curr_num;
1380
1381         if (h == NULL || e == NULL)
1382                 rl_initialize();
1383
1384         if (num < history_base)
1385                 return NULL;
1386
1387         /* save current position */
1388         if (history(h, &ev, H_CURR) != 0)
1389                 return NULL;
1390         curr_num = ev.num;
1391
1392         /*
1393          * use H_DELDATA to set to nth history (without delete) by passing
1394          * (void **)-1  -- as in history_set_pos
1395          */
1396         if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0)
1397                 goto out;
1398
1399         /* get current entry */
1400         if (history(h, &ev, H_CURR) != 0)
1401                 goto out;
1402         if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0)
1403                 goto out;
1404         she.line = ev.str;
1405
1406         /* restore pointer to where it was */
1407         (void)history(h, &ev, H_SET, curr_num);
1408
1409         return &she;
1410
1411 out:
1412         /* restore pointer to where it was */
1413         (void)history(h, &ev, H_SET, curr_num);
1414         return NULL;
1415 }
1416
1417
1418 /*
1419  * add the line to history table
1420  */
1421 int
1422 add_history(const char *line)
1423 {
1424         HistEvent ev;
1425
1426         if (h == NULL || e == NULL)
1427                 rl_initialize();
1428
1429         if (history(h, &ev, H_ENTER, line) == -1)
1430                 return 0;
1431
1432         (void)history(h, &ev, H_GETSIZE);
1433         if (ev.num == history_length)
1434                 history_base++;
1435         else
1436                 history_length = ev.num;
1437         return 0;
1438 }
1439
1440
1441 /*
1442  * remove the specified entry from the history list and return it.
1443  */
1444 HIST_ENTRY *
1445 remove_history(int num)
1446 {
1447         HIST_ENTRY *he;
1448         HistEvent ev;
1449
1450         if (h == NULL || e == NULL)
1451                 rl_initialize();
1452
1453         if ((he = el_malloc(sizeof(*he))) == NULL)
1454                 return NULL;
1455
1456         if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1457                 el_free(he);
1458                 return NULL;
1459         }
1460
1461         he->line = ev.str;
1462         if (history(h, &ev, H_GETSIZE) == 0)
1463                 history_length = ev.num;
1464
1465         return he;
1466 }
1467
1468
1469 /*
1470  * replace the line and data of the num-th entry
1471  */
1472 HIST_ENTRY *
1473 replace_history_entry(int num, const char *line, histdata_t data)
1474 {
1475         HIST_ENTRY *he;
1476         HistEvent ev;
1477         int curr_num;
1478
1479         if (h == NULL || e == NULL)
1480                 rl_initialize();
1481
1482         /* save current position */
1483         if (history(h, &ev, H_CURR) != 0)
1484                 return NULL;
1485         curr_num = ev.num;
1486
1487         /* start from the oldest */
1488         if (history(h, &ev, H_LAST) != 0)
1489                 return NULL;    /* error */
1490
1491         if ((he = el_malloc(sizeof(*he))) == NULL)
1492                 return NULL;
1493
1494         /* look forwards for event matching specified offset */
1495         if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1496                 goto out;
1497
1498         he->line = strdup(ev.str);
1499         if (he->line == NULL)
1500                 goto out;
1501
1502         if (history(h, &ev, H_REPLACE, line, data))
1503                 goto out;
1504
1505         /* restore pointer to where it was */
1506         if (history(h, &ev, H_SET, curr_num))
1507                 goto out;
1508
1509         return he;
1510 out:
1511         el_free(he);
1512         return NULL;
1513 }
1514
1515 /*
1516  * clear the history list - delete all entries
1517  */
1518 void
1519 clear_history(void)
1520 {
1521         HistEvent ev;
1522
1523         if (h == NULL || e == NULL)
1524                 rl_initialize();
1525
1526         (void)history(h, &ev, H_CLEAR);
1527         history_offset = history_length = 0;
1528 }
1529
1530
1531 /*
1532  * returns offset of the current history event
1533  */
1534 int
1535 where_history(void)
1536 {
1537         return history_offset;
1538 }
1539
1540 static HIST_ENTRY **_history_listp;
1541 static HIST_ENTRY *_history_list;
1542
1543 HIST_ENTRY **
1544 history_list(void)
1545 {
1546         HistEvent ev;
1547         HIST_ENTRY **nlp, *nl;
1548         int i;
1549
1550         if (history(h, &ev, H_LAST) != 0)
1551                 return NULL;
1552
1553         if ((nlp = el_realloc(_history_listp,
1554             (size_t)history_length * sizeof(*nlp))) == NULL)
1555                 return NULL;
1556         _history_listp = nlp;
1557
1558         if ((nl = el_realloc(_history_list,
1559             (size_t)history_length * sizeof(*nl))) == NULL)
1560                 return NULL;
1561         _history_list = nl;
1562
1563         i = 0;
1564         do {
1565                 _history_listp[i] = &_history_list[i];
1566                 _history_list[i].line = ev.str;
1567                 _history_list[i].data = NULL;
1568                 if (i++ == history_length)
1569                         abort();
1570         } while (history(h, &ev, H_PREV) == 0);
1571         return _history_listp;
1572 }
1573
1574 /*
1575  * returns current history event or NULL if there is no such event
1576  */
1577 HIST_ENTRY *
1578 current_history(void)
1579 {
1580         HistEvent ev;
1581
1582         if (history(h, &ev, H_PREV_EVENT, history_offset + 1) != 0)
1583                 return NULL;
1584
1585         rl_he.line = ev.str;
1586         rl_he.data = NULL;
1587         return &rl_he;
1588 }
1589
1590
1591 /*
1592  * returns total number of bytes history events' data are using
1593  */
1594 int
1595 history_total_bytes(void)
1596 {
1597         HistEvent ev;
1598         int curr_num;
1599         size_t size;
1600
1601         if (history(h, &ev, H_CURR) != 0)
1602                 return -1;
1603         curr_num = ev.num;
1604
1605         (void)history(h, &ev, H_FIRST);
1606         size = 0;
1607         do
1608                 size += strlen(ev.str) * sizeof(*ev.str);
1609         while (history(h, &ev, H_NEXT) == 0);
1610
1611         /* get to the same position as before */
1612         history(h, &ev, H_PREV_EVENT, curr_num);
1613
1614         return (int)size;
1615 }
1616
1617
1618 /*
1619  * sets the position in the history list to ``pos''
1620  */
1621 int
1622 history_set_pos(int pos)
1623 {
1624         if (pos >= history_length || pos < 0)
1625                 return 0;
1626
1627         history_offset = pos;
1628         return 1;
1629 }
1630
1631
1632 /*
1633  * returns previous event in history and shifts pointer accordingly
1634  * Note that readline and editline define directions in opposite ways.
1635  */
1636 HIST_ENTRY *
1637 previous_history(void)
1638 {
1639         HistEvent ev;
1640
1641         if (history_offset == 0)
1642                 return NULL;
1643
1644         if (history(h, &ev, H_LAST) != 0)
1645                 return NULL;
1646
1647         history_offset--;
1648         return current_history();
1649 }
1650
1651
1652 /*
1653  * returns next event in history and shifts pointer accordingly
1654  */
1655 HIST_ENTRY *
1656 next_history(void)
1657 {
1658         HistEvent ev;
1659
1660         if (history_offset >= history_length)
1661                 return NULL;
1662
1663         if (history(h, &ev, H_LAST) != 0)
1664                 return NULL;
1665
1666         history_offset++;
1667         return current_history();
1668 }
1669
1670
1671 /*
1672  * searches for first history event containing the str
1673  */
1674 int
1675 history_search(const char *str, int direction)
1676 {
1677         HistEvent ev;
1678         const char *strp;
1679         int curr_num;
1680
1681         if (history(h, &ev, H_CURR) != 0)
1682                 return -1;
1683         curr_num = ev.num;
1684
1685         for (;;) {
1686                 if ((strp = strstr(ev.str, str)) != NULL)
1687                         return (int)(strp - ev.str);
1688                 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1689                         break;
1690         }
1691         (void)history(h, &ev, H_SET, curr_num);
1692         return -1;
1693 }
1694
1695
1696 /*
1697  * searches for first history event beginning with str
1698  */
1699 int
1700 history_search_prefix(const char *str, int direction)
1701 {
1702         HistEvent ev;
1703
1704         return (history(h, &ev, direction < 0 ?
1705             H_PREV_STR : H_NEXT_STR, str));
1706 }
1707
1708
1709 /*
1710  * search for event in history containing str, starting at offset
1711  * abs(pos); continue backward, if pos<0, forward otherwise
1712  */
1713 /* ARGSUSED */
1714 int
1715 history_search_pos(const char *str,
1716                    int direction __attribute__((__unused__)), int pos)
1717 {
1718         HistEvent ev;
1719         int curr_num, off;
1720
1721         off = (pos > 0) ? pos : -pos;
1722         pos = (pos > 0) ? 1 : -1;
1723
1724         if (history(h, &ev, H_CURR) != 0)
1725                 return -1;
1726         curr_num = ev.num;
1727
1728         if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0)
1729                 return -1;
1730
1731         for (;;) {
1732                 if (strstr(ev.str, str))
1733                         return off;
1734                 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1735                         break;
1736         }
1737
1738         /* set "current" pointer back to previous state */
1739         (void)history(h, &ev,
1740             pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1741
1742         return -1;
1743 }
1744
1745
1746 /********************************/
1747 /* completion functions */
1748
1749 char *
1750 tilde_expand(char *name)
1751 {
1752         return fn_tilde_expand(name);
1753 }
1754
1755 char *
1756 filename_completion_function(const char *name, int state)
1757 {
1758         return fn_filename_completion_function(name, state);
1759 }
1760
1761 /*
1762  * a completion generator for usernames; returns _first_ username
1763  * which starts with supplied text
1764  * text contains a partial username preceded by random character
1765  * (usually '~'); state resets search from start (??? should we do that anyway)
1766  * it's the caller's responsibility to free the returned value
1767  */
1768 char *
1769 username_completion_function(const char *text, int state)
1770 {
1771 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
1772         struct passwd pwres;
1773         char pwbuf[1024];
1774 #endif
1775         struct passwd *pass = NULL;
1776
1777         if (text[0] == '\0')
1778                 return NULL;
1779
1780         if (*text == '~')
1781                 text++;
1782
1783         if (state == 0)
1784                 setpwent();
1785
1786         while (
1787             (pass = getpwent()) != NULL
1788             && text[0] == pass->pw_name[0]
1789             && strcmp(text, pass->pw_name) == 0)
1790                 continue;
1791
1792         if (pass == NULL) {
1793                 endpwent();
1794                 return NULL;
1795         }
1796         return strdup(pass->pw_name);
1797 }
1798
1799
1800 /*
1801  * el-compatible wrapper to send TSTP on ^Z
1802  */
1803 /* ARGSUSED */
1804 static unsigned char
1805 _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
1806 {
1807         (void)kill(0, SIGTSTP);
1808         return CC_NORM;
1809 }
1810
1811 /*
1812  * Display list of strings in columnar format on readline's output stream.
1813  * 'matches' is list of strings, 'len' is number of strings in 'matches',
1814  * 'max' is maximum length of string in 'matches'.
1815  */
1816 void
1817 rl_display_match_list(char **matches, int len, int max)
1818 {
1819
1820         fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1821 }
1822
1823 static const char *
1824 /*ARGSUSED*/
1825 _rl_completion_append_character_function(const char *dummy
1826     __attribute__((__unused__)))
1827 {
1828         static char buf[2];
1829         buf[0] = (char)rl_completion_append_character;
1830         buf[1] = '\0';
1831         return buf;
1832 }
1833
1834
1835 /*
1836  * complete word at current point
1837  */
1838 /* ARGSUSED */
1839 int
1840 rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1841 {
1842         static ct_buffer_t wbreak_conv, sprefix_conv;
1843         char *breakchars;
1844
1845         if (h == NULL || e == NULL)
1846                 rl_initialize();
1847
1848         if (rl_inhibit_completion) {
1849                 char arr[2];
1850                 arr[0] = (char)invoking_key;
1851                 arr[1] = '\0';
1852                 el_insertstr(e, arr);
1853                 return CC_REFRESH;
1854         }
1855
1856         if (rl_completion_word_break_hook != NULL)
1857                 breakchars = (*rl_completion_word_break_hook)();
1858         else
1859                 breakchars = rl_basic_word_break_characters;
1860
1861         _rl_update_pos();
1862
1863         /* Just look at how many global variables modify this operation! */
1864         return fn_complete(e,
1865             (rl_compentry_func_t *)rl_completion_entry_function,
1866             rl_attempted_completion_function,
1867             ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1868             ct_decode_string(breakchars, &sprefix_conv),
1869             _rl_completion_append_character_function,
1870             (size_t)rl_completion_query_items,
1871             &rl_completion_type, &rl_attempted_completion_over,
1872             &rl_point, &rl_end);
1873
1874
1875 }
1876
1877
1878 /* ARGSUSED */
1879 static unsigned char
1880 _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
1881 {
1882         return (unsigned char)rl_complete(0, ch);
1883 }
1884
1885 /*
1886  * misc other functions
1887  */
1888
1889 /*
1890  * bind key c to readline-type function func
1891  */
1892 int
1893 rl_bind_key(int c, rl_command_func_t *func)
1894 {
1895         int retval = -1;
1896
1897         if (h == NULL || e == NULL)
1898                 rl_initialize();
1899
1900         if (func == rl_insert) {
1901                 /* XXX notice there is no range checking of ``c'' */
1902                 e->el_map.key[c] = ED_INSERT;
1903                 retval = 0;
1904         }
1905         return retval;
1906 }
1907
1908
1909 /*
1910  * read one key from input - handles chars pushed back
1911  * to input stream also
1912  */
1913 int
1914 rl_read_key(void)
1915 {
1916         char fooarr[2 * sizeof(int)];
1917
1918         if (e == NULL || h == NULL)
1919                 rl_initialize();
1920
1921         return el_getc(e, fooarr);
1922 }
1923
1924
1925 /*
1926  * reset the terminal
1927  */
1928 /* ARGSUSED */
1929 void
1930 rl_reset_terminal(const char *p __attribute__((__unused__)))
1931 {
1932
1933         if (h == NULL || e == NULL)
1934                 rl_initialize();
1935         el_reset(e);
1936 }
1937
1938
1939 /*
1940  * insert character ``c'' back into input stream, ``count'' times
1941  */
1942 int
1943 rl_insert(int count, int c)
1944 {
1945         char arr[2];
1946
1947         if (h == NULL || e == NULL)
1948                 rl_initialize();
1949
1950         /* XXX - int -> char conversion can lose on multichars */
1951         arr[0] = (char)c;
1952         arr[1] = '\0';
1953
1954         for (; count > 0; count--)
1955                 el_push(e, arr);
1956
1957         return 0;
1958 }
1959
1960 int
1961 rl_insert_text(const char *text)
1962 {
1963         if (!text || *text == 0)
1964                 return 0;
1965
1966         if (h == NULL || e == NULL)
1967                 rl_initialize();
1968
1969         if (el_insertstr(e, text) < 0)
1970                 return 0;
1971         return (int)strlen(text);
1972 }
1973
1974 /*ARGSUSED*/
1975 int
1976 rl_newline(int count __attribute__((__unused__)),
1977     int c __attribute__((__unused__)))
1978 {
1979         /*
1980          * Readline-4.0 appears to ignore the args.
1981          */
1982         return rl_insert(1, '\n');
1983 }
1984
1985 /*ARGSUSED*/
1986 static unsigned char
1987 rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c)
1988 {
1989         if (map[c] == NULL)
1990             return CC_ERROR;
1991
1992         _rl_update_pos();
1993
1994         (*map[c])(1, c);
1995
1996         /* If rl_done was set by the above call, deal with it here */
1997         if (rl_done)
1998                 return CC_EOF;
1999
2000         return CC_NORM;
2001 }
2002
2003 int
2004 rl_add_defun(const char *name, rl_command_func_t *fun, int c)
2005 {
2006         char dest[8];
2007         if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
2008                 return -1;
2009         map[(unsigned char)c] = fun;
2010         el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
2011         vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
2012         el_set(e, EL_BIND, dest, name, NULL);
2013         return 0;
2014 }
2015
2016 void
2017 rl_callback_read_char(void)
2018 {
2019         int count = 0, done = 0;
2020         const char *buf = el_gets(e, &count);
2021         char *wbuf;
2022
2023         if (buf == NULL || count-- <= 0)
2024                 return;
2025         if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
2026                 done = 1;
2027         if (buf[count] == '\n' || buf[count] == '\r')
2028                 done = 2;
2029
2030         if (done && rl_linefunc != NULL) {
2031                 el_set(e, EL_UNBUFFERED, 0);
2032                 if (done == 2) {
2033                     if ((wbuf = strdup(buf)) != NULL)
2034                         wbuf[count] = '\0';
2035                 } else
2036                         wbuf = NULL;
2037                 (*(void (*)(const char *))rl_linefunc)(wbuf);
2038                 el_set(e, EL_UNBUFFERED, 1);
2039         }
2040 }
2041
2042 void
2043 rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc)
2044 {
2045         if (e == NULL) {
2046                 rl_initialize();
2047         }
2048         (void)rl_set_prompt(prompt);
2049         rl_linefunc = linefunc;
2050         el_set(e, EL_UNBUFFERED, 1);
2051 }
2052
2053 void
2054 rl_callback_handler_remove(void)
2055 {
2056         el_set(e, EL_UNBUFFERED, 0);
2057         rl_linefunc = NULL;
2058 }
2059
2060 void
2061 rl_redisplay(void)
2062 {
2063         char a[2];
2064         a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT];
2065         a[1] = '\0';
2066         el_push(e, a);
2067 }
2068
2069 int
2070 rl_get_previous_history(int count, int key)
2071 {
2072         char a[2];
2073         a[0] = (char)key;
2074         a[1] = '\0';
2075         while (count--)
2076                 el_push(e, a);
2077         return 0;
2078 }
2079
2080 void
2081 /*ARGSUSED*/
2082 rl_prep_terminal(int meta_flag __attribute__((__unused__)))
2083 {
2084         el_set(e, EL_PREP_TERM, 1);
2085 }
2086
2087 void
2088 rl_deprep_terminal(void)
2089 {
2090         el_set(e, EL_PREP_TERM, 0);
2091 }
2092
2093 int
2094 rl_read_init_file(const char *s)
2095 {
2096         return el_source(e, s);
2097 }
2098
2099 int
2100 rl_parse_and_bind(const char *line)
2101 {
2102         const char **argv;
2103         int argc;
2104         Tokenizer *tok;
2105
2106         tok = tok_init(NULL);
2107         tok_str(tok, line, &argc, &argv);
2108         argc = el_parse(e, argc, argv);
2109         tok_end(tok);
2110         return argc ? 1 : 0;
2111 }
2112
2113 int
2114 rl_variable_bind(const char *var, const char *value)
2115 {
2116         /*
2117          * The proper return value is undocument, but this is what the
2118          * readline source seems to do.
2119          */
2120         return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
2121 }
2122
2123 void
2124 rl_stuff_char(int c)
2125 {
2126         char buf[2];
2127
2128         buf[0] = (char)c;
2129         buf[1] = '\0';
2130         el_insertstr(e, buf);
2131 }
2132
2133 static int
2134 _rl_event_read_char(EditLine *el, wchar_t *wc)
2135 {
2136         char    ch;
2137         int     n;
2138         ssize_t num_read = 0;
2139
2140         ch = '\0';
2141         *wc = L'\0';
2142         while (rl_event_hook) {
2143
2144                 (*rl_event_hook)();
2145
2146 #if defined(FIONREAD)
2147                 if (ioctl(el->el_infd, FIONREAD, &n) < 0)
2148                         return -1;
2149                 if (n)
2150                         num_read = read(el->el_infd, &ch, (size_t)1);
2151                 else
2152                         num_read = 0;
2153 #elif defined(F_SETFL) && defined(O_NDELAY)
2154                 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
2155                         return -1;
2156                 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
2157                         return -1;
2158                 num_read = read(el->el_infd, &ch, 1);
2159                 if (fcntl(el->el_infd, F_SETFL, n))
2160                         return -1;
2161 #else
2162                 /* not non-blocking, but what you gonna do? */
2163                 num_read = read(el->el_infd, &ch, 1);
2164                 return -1;
2165 #endif
2166
2167                 if (num_read < 0 && errno == EAGAIN)
2168                         continue;
2169                 if (num_read == 0)
2170                         continue;
2171                 break;
2172         }
2173         if (!rl_event_hook)
2174                 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
2175         *wc = (wchar_t)ch;
2176         return (int)num_read;
2177 }
2178
2179 static void
2180 _rl_update_pos(void)
2181 {
2182         const LineInfo *li = el_line(e);
2183
2184         rl_point = (int)(li->cursor - li->buffer);
2185         rl_end = (int)(li->lastchar - li->buffer);
2186 }
2187
2188 void
2189 rl_get_screen_size(int *rows, int *cols)
2190 {
2191         if (rows)
2192                 el_get(e, EL_GETTC, "li", rows, (void *)0);
2193         if (cols)
2194                 el_get(e, EL_GETTC, "co", cols, (void *)0);
2195 }
2196
2197 void
2198 rl_set_screen_size(int rows, int cols)
2199 {
2200         char buf[64];
2201         (void)snprintf(buf, sizeof(buf), "%d", rows);
2202         el_set(e, EL_SETTC, "li", buf, NULL);
2203         (void)snprintf(buf, sizeof(buf), "%d", cols);
2204         el_set(e, EL_SETTC, "co", buf, NULL);
2205 }
2206
2207 char **
2208 rl_completion_matches(const char *str, rl_compentry_func_t *fun)
2209 {
2210         size_t len, max, i, j, min;
2211         char **list, *match, *a, *b;
2212
2213         len = 1;
2214         max = 10;
2215         if ((list = el_malloc(max * sizeof(*list))) == NULL)
2216                 return NULL;
2217
2218         while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
2219                 list[len++] = match;
2220                 if (len == max) {
2221                         char **nl;
2222                         max += 10;
2223                         if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL)
2224                                 goto out;
2225                         list = nl;
2226                 }
2227         }
2228         if (len == 1)
2229                 goto out;
2230         list[len] = NULL;
2231         if (len == 2) {
2232                 if ((list[0] = strdup(list[1])) == NULL)
2233                         goto out;
2234                 return list;
2235         }
2236         qsort(&list[1], len - 1, sizeof(*list),
2237             (int (*)(const void *, const void *)) strcmp);
2238         min = SIZE_MAX;
2239         for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
2240                 b = list[i + 1];
2241                 for (j = 0; a[j] && a[j] == b[j]; j++)
2242                         continue;
2243                 if (min > j)
2244                         min = j;
2245         }
2246         if (min == 0 && *str) {
2247                 if ((list[0] = strdup(str)) == NULL)
2248                         goto out;
2249         } else {
2250                 if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL)
2251                         goto out;
2252                 (void)memcpy(list[0], list[1], min);
2253                 list[0][min] = '\0';
2254         }
2255         return list;
2256
2257 out:
2258         el_free(list);
2259         return NULL;
2260 }
2261
2262 char *
2263 rl_filename_completion_function (const char *text, int state)
2264 {
2265         return fn_filename_completion_function(text, state);
2266 }
2267
2268 void
2269 rl_forced_update_display(void)
2270 {
2271         el_set(e, EL_REFRESH);
2272 }
2273
2274 int
2275 _rl_abort_internal(void)
2276 {
2277         el_beep(e);
2278         longjmp(topbuf, 1);
2279         /*NOTREACHED*/
2280 }
2281
2282 int
2283 _rl_qsort_string_compare(char **s1, char **s2)
2284 {
2285         return strcoll(*s1, *s2);
2286 }
2287
2288 HISTORY_STATE *
2289 history_get_history_state(void)
2290 {
2291         HISTORY_STATE *hs;
2292
2293         if ((hs = el_malloc(sizeof(*hs))) == NULL)
2294                 return NULL;
2295         hs->length = history_length;
2296         return hs;
2297 }
2298
2299 int
2300 /*ARGSUSED*/
2301 rl_kill_text(int from __attribute__((__unused__)),
2302     int to __attribute__((__unused__)))
2303 {
2304         return 0;
2305 }
2306
2307 Keymap
2308 rl_make_bare_keymap(void)
2309 {
2310         return NULL;
2311 }
2312
2313 Keymap
2314 rl_get_keymap(void)
2315 {
2316         return NULL;
2317 }
2318
2319 void
2320 /*ARGSUSED*/
2321 rl_set_keymap(Keymap k __attribute__((__unused__)))
2322 {
2323 }
2324
2325 int
2326 /*ARGSUSED*/
2327 rl_generic_bind(int type __attribute__((__unused__)),
2328     const char * keyseq __attribute__((__unused__)),
2329     const char * data __attribute__((__unused__)),
2330     Keymap k __attribute__((__unused__)))
2331 {
2332         return 0;
2333 }
2334
2335 int
2336 /*ARGSUSED*/
2337 rl_bind_key_in_map(int key __attribute__((__unused__)),
2338     rl_command_func_t *fun __attribute__((__unused__)),
2339     Keymap k __attribute__((__unused__)))
2340 {
2341         return 0;
2342 }
2343
2344 /* unsupported, but needed by python */
2345 void
2346 rl_cleanup_after_signal(void)
2347 {
2348 }
2349
2350 int
2351 rl_on_new_line(void)
2352 {
2353         return 0;
2354 }
2355
2356 void
2357 rl_free_line_state(void)
2358 {
2359 }
2360
2361 int
2362 /*ARGSUSED*/
2363 rl_set_keyboard_input_timeout(int u __attribute__((__unused__)))
2364 {
2365         return 0;
2366 }