source: heimdal/trunk/lib/libedit/src/readline.c

Last change on this file was 1, checked in by Paul Smedley, 10 years ago

Initial commit of Heimdal 1.5.3
File size: 43.4 KB
Line 
1/* $NetBSD: readline.c,v 1.92 2010/09/16 20:08:51 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 1.92 2010/09/16 20:08:51 christos Exp $");
35#endif /* not lint && not SCCSID */
36
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <stdio.h>
40#include <dirent.h>
41#include <string.h>
42#include <pwd.h>
43#include <ctype.h>
44#include <stdlib.h>
45#include <unistd.h>
46#include <limits.h>
47#include <errno.h>
48#include <fcntl.h>
49#include <setjmp.h>
50#include <vis.h>
51#include "editline/readline.h"
52#include "el.h"
53#include "fcns.h" /* for EL_NUM_FCNS */
54#include "histedit.h"
55#include "filecomplete.h"
56
57#if !defined(SIZE_T_MAX)
58# define SIZE_T_MAX (size_t)(-1)
59#endif
60
61void rl_prep_terminal(int);
62void rl_deprep_terminal(void);
63
64/* for rl_complete() */
65#define TAB '\r'
66
67/* see comment at the #ifdef for sense of this */
68/* #define GDB_411_HACK */
69
70/* readline compatibility stuff - look at readline sources/documentation */
71/* to see what these variables mean */
72const char *rl_library_version = "EditLine wrapper";
73int rl_readline_version = RL_READLINE_VERSION;
74static char empty[] = { '\0' };
75static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
76static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
77 '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
78char *rl_readline_name = empty;
79FILE *rl_instream = NULL;
80FILE *rl_outstream = NULL;
81int rl_point = 0;
82int rl_end = 0;
83char *rl_line_buffer = NULL;
84VCPFunction *rl_linefunc = NULL;
85int rl_done = 0;
86VFunction *rl_event_hook = NULL;
87KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
88 emacs_meta_keymap,
89 emacs_ctlx_keymap;
90
91int history_base = 1; /* probably never subject to change */
92int history_length = 0;
93int max_input_history = 0;
94char history_expansion_char = '!';
95char history_subst_char = '^';
96char *history_no_expand_chars = expand_chars;
97Function *history_inhibit_expansion_function = NULL;
98char *history_arg_extract(int start, int end, const char *str);
99
100int rl_inhibit_completion = 0;
101int rl_attempted_completion_over = 0;
102char *rl_basic_word_break_characters = break_chars;
103char *rl_completer_word_break_characters = NULL;
104char *rl_completer_quote_characters = NULL;
105Function *rl_completion_entry_function = NULL;
106CPPFunction *rl_attempted_completion_function = NULL;
107Function *rl_pre_input_hook = NULL;
108Function *rl_startup1_hook = NULL;
109int (*rl_getc_function)(FILE *) = NULL;
110char *rl_terminal_name = NULL;
111int rl_already_prompted = 0;
112int rl_filename_completion_desired = 0;
113int rl_ignore_completion_duplicates = 0;
114int rl_catch_signals = 1;
115int readline_echoing_p = 1;
116int _rl_print_completions_horizontally = 0;
117VFunction *rl_redisplay_function = NULL;
118Function *rl_startup_hook = NULL;
119VFunction *rl_completion_display_matches_hook = NULL;
120VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
121VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
122KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
123
124/*
125 * The current prompt string.
126 */
127char *rl_prompt = NULL;
128/*
129 * This is set to character indicating type of completion being done by
130 * rl_complete_internal(); this is available for application completion
131 * functions.
132 */
133int rl_completion_type = 0;
134
135/*
136 * If more than this number of items results from query for possible
137 * completions, we ask user if they are sure to really display the list.
138 */
139int rl_completion_query_items = 100;
140
141/*
142 * List of characters which are word break characters, but should be left
143 * in the parsed text when it is passed to the completion function.
144 * Shell uses this to help determine what kind of completing to do.
145 */
146char *rl_special_prefixes = NULL;
147
148/*
149 * This is the character appended to the completed words if at the end of
150 * the line. Default is ' ' (a space).
151 */
152int rl_completion_append_character = ' ';
153
154/* stuff below is used internally by libedit for readline emulation */
155
156static History *h = NULL;
157static EditLine *e = NULL;
158static Function *map[256];
159static jmp_buf topbuf;
160
161/* internal functions */
162static unsigned char _el_rl_complete(EditLine *, int);
163static unsigned char _el_rl_tstp(EditLine *, int);
164static char *_get_prompt(EditLine *);
165static int _getc_function(EditLine *, char *);
166static HIST_ENTRY *_move_history(int);
167static int _history_expand_command(const char *, size_t, size_t,
168 char **);
169static char *_rl_compat_sub(const char *, const char *,
170 const char *, int);
171static int _rl_event_read_char(EditLine *, char *);
172static void _rl_update_pos(void);
173
174
175/* ARGSUSED */
176static char *
177_get_prompt(EditLine *el __attribute__((__unused__)))
178{
179 rl_already_prompted = 1;
180 return (rl_prompt);
181}
182
183
184/*
185 * generic function for moving around history
186 */
187static HIST_ENTRY *
188_move_history(int op)
189{
190 HistEvent ev;
191 static HIST_ENTRY rl_he;
192
193 if (history(h, &ev, op) != 0)
194 return (HIST_ENTRY *) NULL;
195
196 rl_he.line = ev.str;
197 rl_he.data = NULL;
198
199 return (&rl_he);
200}
201
202
203/*
204 * read one key from user defined input function
205 */
206static int
207/*ARGSUSED*/
208_getc_function(EditLine *el, char *c)
209{
210 int i;
211
212 i = (*rl_getc_function)(NULL);
213 if (i == -1)
214 return 0;
215 *c = i;
216 return 1;
217}
218
219static void
220_resize_fun(EditLine *el, void *a)
221{
222 const LineInfo *li;
223 char **ap = a;
224
225 li = el_line(el);
226 /* a cheesy way to get rid of const cast. */
227 *ap = memchr(li->buffer, *li->buffer, 1);
228}
229
230static const char _dothistory[] = "/.history";
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 strlcpy(path, p->pw_dir, PATH_MAX);
243 strlcat(path, _dothistory, PATH_MAX);
244 return path;
245}
246
247/*
248 * READLINE compatibility stuff
249 */
250
251/*
252 * Set the prompt
253 */
254int
255rl_set_prompt(const char *prompt)
256{
257 char *p;
258
259 if (!prompt)
260 prompt = "";
261 if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
262 return 0;
263 if (rl_prompt)
264 free(rl_prompt);
265 rl_prompt = strdup(prompt);
266 if (rl_prompt == NULL)
267 return -1;
268
269 while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
270 *p = RL_PROMPT_START_IGNORE;
271
272 return 0;
273}
274
275/*
276 * initialize rl compat stuff
277 */
278int
279rl_initialize(void)
280{
281 HistEvent ev;
282 int editmode = 1;
283 struct termios t;
284
285 if (e != NULL)
286 el_end(e);
287 if (h != NULL)
288 history_end(h);
289
290 if (!rl_instream)
291 rl_instream = stdin;
292 if (!rl_outstream)
293 rl_outstream = stdout;
294
295 /*
296 * See if we don't really want to run the editor
297 */
298 if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
299 editmode = 0;
300
301 e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
302
303 if (!editmode)
304 el_set(e, EL_EDITMODE, 0);
305
306 h = history_init();
307 if (!e || !h)
308 return (-1);
309
310 history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */
311 history_length = 0;
312 max_input_history = INT_MAX;
313 el_set(e, EL_HIST, history, h);
314
315 /* Setup resize function */
316 el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
317
318 /* setup getc function if valid */
319 if (rl_getc_function)
320 el_set(e, EL_GETCFN, _getc_function);
321
322 /* for proper prompt printing in readline() */
323 if (rl_set_prompt("") == -1) {
324 history_end(h);
325 el_end(e);
326 return -1;
327 }
328 el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
329 el_set(e, EL_SIGNAL, rl_catch_signals);
330
331 /* set default mode to "emacs"-style and read setting afterwards */
332 /* so this can be overriden */
333 el_set(e, EL_EDITOR, "emacs");
334 if (rl_terminal_name != NULL)
335 el_set(e, EL_TERMINAL, rl_terminal_name);
336 else
337 el_get(e, EL_TERMINAL, &rl_terminal_name);
338
339 /*
340 * Word completion - this has to go AFTER rebinding keys
341 * to emacs-style.
342 */
343 el_set(e, EL_ADDFN, "rl_complete",
344 "ReadLine compatible completion function",
345 _el_rl_complete);
346 el_set(e, EL_BIND, "^I", "rl_complete", NULL);
347
348 /*
349 * Send TSTP when ^Z is pressed.
350 */
351 el_set(e, EL_ADDFN, "rl_tstp",
352 "ReadLine compatible suspend function",
353 _el_rl_tstp);
354 el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
355
356 /* read settings from configuration file */
357 el_source(e, NULL);
358
359 /*
360 * Unfortunately, some applications really do use rl_point
361 * and rl_line_buffer directly.
362 */
363 _resize_fun(e, &rl_line_buffer);
364 _rl_update_pos();
365
366 if (rl_startup_hook)
367 (*rl_startup_hook)(NULL, 0);
368
369 return (0);
370}
371
372
373/*
374 * read one line from input stream and return it, chomping
375 * trailing newline (if there is any)
376 */
377char *
378readline(const char *p)
379{
380 HistEvent ev;
381 const char * volatile prompt = p;
382 int count;
383 const char *ret;
384 char *buf;
385 static int used_event_hook;
386
387 if (e == NULL || h == NULL)
388 rl_initialize();
389
390 rl_done = 0;
391
392 (void)setjmp(topbuf);
393
394 /* update prompt accordingly to what has been passed */
395 if (rl_set_prompt(prompt) == -1)
396 return NULL;
397
398 if (rl_pre_input_hook)
399 (*rl_pre_input_hook)(NULL, 0);
400
401 if (rl_event_hook && !(e->el_flags&NO_TTY)) {
402 el_set(e, EL_GETCFN, _rl_event_read_char);
403 used_event_hook = 1;
404 }
405
406 if (!rl_event_hook && used_event_hook) {
407 el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
408 used_event_hook = 0;
409 }
410
411 rl_already_prompted = 0;
412
413 /* get one line from input stream */
414 ret = el_gets(e, &count);
415
416 if (ret && count > 0) {
417 int lastidx;
418
419 buf = strdup(ret);
420 if (buf == NULL)
421 return NULL;
422 lastidx = count - 1;
423 if (buf[lastidx] == '\n')
424 buf[lastidx] = '\0';
425 } else
426 buf = NULL;
427
428 history(h, &ev, H_GETSIZE);
429 history_length = ev.num;
430
431 return buf;
432}
433
434/*
435 * history functions
436 */
437
438/*
439 * is normally called before application starts to use
440 * history expansion functions
441 */
442void
443using_history(void)
444{
445 if (h == NULL || e == NULL)
446 rl_initialize();
447}
448
449
450/*
451 * substitute ``what'' with ``with'', returning resulting string; if
452 * globally == 1, substitutes all occurrences of what, otherwise only the
453 * first one
454 */
455static char *
456_rl_compat_sub(const char *str, const char *what, const char *with,
457 int globally)
458{
459 const char *s;
460 char *r, *result;
461 size_t len, with_len, what_len;
462
463 len = strlen(str);
464 with_len = strlen(with);
465 what_len = strlen(what);
466
467 /* calculate length we need for result */
468 s = str;
469 while (*s) {
470 if (*s == *what && !strncmp(s, what, what_len)) {
471 len += with_len - what_len;
472 if (!globally)
473 break;
474 s += what_len;
475 } else
476 s++;
477 }
478 r = result = malloc(len + 1);
479 if (result == NULL)
480 return NULL;
481 s = str;
482 while (*s) {
483 if (*s == *what && !strncmp(s, what, what_len)) {
484 (void)strncpy(r, with, with_len);
485 r += with_len;
486 s += what_len;
487 if (!globally) {
488 (void)strcpy(r, s);
489 return(result);
490 }
491 } else
492 *r++ = *s++;
493 }
494 *r = '\0';
495 return(result);
496}
497
498static char *last_search_pat; /* last !?pat[?] search pattern */
499static char *last_search_match; /* last !?pat[?] that matched */
500
501const char *
502get_history_event(const char *cmd, int *cindex, int qchar)
503{
504 int idx, sign, sub, num, begin, ret;
505 size_t len;
506 char *pat;
507 const char *rptr;
508 HistEvent ev;
509
510 idx = *cindex;
511 if (cmd[idx++] != history_expansion_char)
512 return(NULL);
513
514 /* find out which event to take */
515 if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
516 if (history(h, &ev, H_FIRST) != 0)
517 return(NULL);
518 *cindex = cmd[idx]? (idx + 1):idx;
519 return ev.str;
520 }
521 sign = 0;
522 if (cmd[idx] == '-') {
523 sign = 1;
524 idx++;
525 }
526
527 if ('0' <= cmd[idx] && cmd[idx] <= '9') {
528 HIST_ENTRY *rl_he;
529
530 num = 0;
531 while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
532 num = num * 10 + cmd[idx] - '0';
533 idx++;
534 }
535 if (sign)
536 num = history_length - num + 1;
537
538 if (!(rl_he = history_get(num)))
539 return(NULL);
540
541 *cindex = idx;
542 return(rl_he->line);
543 }
544 sub = 0;
545 if (cmd[idx] == '?') {
546 sub = 1;
547 idx++;
548 }
549 begin = idx;
550 while (cmd[idx]) {
551 if (cmd[idx] == '\n')
552 break;
553 if (sub && cmd[idx] == '?')
554 break;
555 if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
556 || cmd[idx] == '\t' || cmd[idx] == qchar))
557 break;
558 idx++;
559 }
560 len = idx - begin;
561 if (sub && cmd[idx] == '?')
562 idx++;
563 if (sub && len == 0 && last_search_pat && *last_search_pat)
564 pat = last_search_pat;
565 else if (len == 0)
566 return(NULL);
567 else {
568 if ((pat = malloc(len + 1)) == NULL)
569 return NULL;
570 (void)strncpy(pat, cmd + begin, len);
571 pat[len] = '\0';
572 }
573
574 if (history(h, &ev, H_CURR) != 0) {
575 if (pat != last_search_pat)
576 free(pat);
577 return (NULL);
578 }
579 num = ev.num;
580
581 if (sub) {
582 if (pat != last_search_pat) {
583 if (last_search_pat)
584 free(last_search_pat);
585 last_search_pat = pat;
586 }
587 ret = history_search(pat, -1);
588 } else
589 ret = history_search_prefix(pat, -1);
590
591 if (ret == -1) {
592 /* restore to end of list on failed search */
593 history(h, &ev, H_FIRST);
594 (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
595 if (pat != last_search_pat)
596 free(pat);
597 return(NULL);
598 }
599
600 if (sub && len) {
601 if (last_search_match && last_search_match != pat)
602 free(last_search_match);
603 last_search_match = pat;
604 }
605
606 if (pat != last_search_pat)
607 free(pat);
608
609 if (history(h, &ev, H_CURR) != 0)
610 return(NULL);
611 *cindex = idx;
612 rptr = ev.str;
613
614 /* roll back to original position */
615 (void)history(h, &ev, H_SET, num);
616
617 return rptr;
618}
619
620/*
621 * the real function doing history expansion - takes as argument command
622 * to do and data upon which the command should be executed
623 * does expansion the way I've understood readline documentation
624 *
625 * returns 0 if data was not modified, 1 if it was and 2 if the string
626 * should be only printed and not executed; in case of error,
627 * returns -1 and *result points to NULL
628 * it's callers responsibility to free() string returned in *result
629 */
630static int
631_history_expand_command(const char *command, size_t offs, size_t cmdlen,
632 char **result)
633{
634 char *tmp, *search = NULL, *aptr;
635 const char *ptr, *cmd;
636 static char *from = NULL, *to = NULL;
637 int start, end, idx, has_mods = 0;
638 int p_on = 0, g_on = 0;
639
640 *result = NULL;
641 aptr = NULL;
642 ptr = NULL;
643
644 /* First get event specifier */
645 idx = 0;
646
647 if (strchr(":^*$", command[offs + 1])) {
648 char str[4];
649 /*
650 * "!:" is shorthand for "!!:".
651 * "!^", "!*" and "!$" are shorthand for
652 * "!!:^", "!!:*" and "!!:$" respectively.
653 */
654 str[0] = str[1] = '!';
655 str[2] = '0';
656 ptr = get_history_event(str, &idx, 0);
657 idx = (command[offs + 1] == ':')? 1:0;
658 has_mods = 1;
659 } else {
660 if (command[offs + 1] == '#') {
661 /* use command so far */
662 if ((aptr = malloc(offs + 1)) == NULL)
663 return -1;
664 (void)strncpy(aptr, command, offs);
665 aptr[offs] = '\0';
666 idx = 1;
667 } else {
668 int qchar;
669
670 qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
671 ptr = get_history_event(command + offs, &idx, qchar);
672 }
673 has_mods = command[offs + idx] == ':';
674 }
675
676 if (ptr == NULL && aptr == NULL)
677 return(-1);
678
679 if (!has_mods) {
680 *result = strdup(aptr ? aptr : ptr);
681 if (aptr)
682 free(aptr);
683 if (*result == NULL)
684 return -1;
685 return(1);
686 }
687
688 cmd = command + offs + idx + 1;
689
690 /* Now parse any word designators */
691
692 if (*cmd == '%') /* last word matched by ?pat? */
693 tmp = strdup(last_search_match? last_search_match:"");
694 else if (strchr("^*$-0123456789", *cmd)) {
695 start = end = -1;
696 if (*cmd == '^')
697 start = end = 1, cmd++;
698 else if (*cmd == '$')
699 start = -1, cmd++;
700 else if (*cmd == '*')
701 start = 1, cmd++;
702 else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
703 start = 0;
704 while (*cmd && '0' <= *cmd && *cmd <= '9')
705 start = start * 10 + *cmd++ - '0';
706
707 if (*cmd == '-') {
708 if (isdigit((unsigned char) cmd[1])) {
709 cmd++;
710 end = 0;
711 while (*cmd && '0' <= *cmd && *cmd <= '9')
712 end = end * 10 + *cmd++ - '0';
713 } else if (cmd[1] == '$') {
714 cmd += 2;
715 end = -1;
716 } else {
717 cmd++;
718 end = -2;
719 }
720 } else if (*cmd == '*')
721 end = -1, cmd++;
722 else
723 end = start;
724 }
725 tmp = history_arg_extract(start, end, aptr? aptr:ptr);
726 if (tmp == NULL) {
727 (void)fprintf(rl_outstream, "%s: Bad word specifier",
728 command + offs + idx);
729 if (aptr)
730 free(aptr);
731 return(-1);
732 }
733 } else
734 tmp = strdup(aptr? aptr:ptr);
735
736 if (aptr)
737 free(aptr);
738
739 if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
740 *result = tmp;
741 return(1);
742 }
743
744 for (; *cmd; cmd++) {
745 if (*cmd == ':')
746 continue;
747 else if (*cmd == 'h') { /* remove trailing path */
748 if ((aptr = strrchr(tmp, '/')) != NULL)
749 *aptr = '\0';
750 } else if (*cmd == 't') { /* remove leading path */
751 if ((aptr = strrchr(tmp, '/')) != NULL) {
752 aptr = strdup(aptr + 1);
753 free(tmp);
754 tmp = aptr;
755 }
756 } else if (*cmd == 'r') { /* remove trailing suffix */
757 if ((aptr = strrchr(tmp, '.')) != NULL)
758 *aptr = '\0';
759 } else if (*cmd == 'e') { /* remove all but suffix */
760 if ((aptr = strrchr(tmp, '.')) != NULL) {
761 aptr = strdup(aptr);
762 free(tmp);
763 tmp = aptr;
764 }
765 } else if (*cmd == 'p') /* print only */
766 p_on = 1;
767 else if (*cmd == 'g')
768 g_on = 2;
769 else if (*cmd == 's' || *cmd == '&') {
770 char *what, *with, delim;
771 size_t len, from_len;
772 size_t size;
773
774 if (*cmd == '&' && (from == NULL || to == NULL))
775 continue;
776 else if (*cmd == 's') {
777 delim = *(++cmd), cmd++;
778 size = 16;
779 what = realloc(from, size);
780 if (what == NULL) {
781 free(from);
782 free(tmp);
783 return 0;
784 }
785 len = 0;
786 for (; *cmd && *cmd != delim; cmd++) {
787 if (*cmd == '\\' && cmd[1] == delim)
788 cmd++;
789 if (len >= size) {
790 char *nwhat;
791 nwhat = realloc(what,
792 (size <<= 1));
793 if (nwhat == NULL) {
794 free(what);
795 free(tmp);
796 return 0;
797 }
798 what = nwhat;
799 }
800 what[len++] = *cmd;
801 }
802 what[len] = '\0';
803 from = what;
804 if (*what == '\0') {
805 free(what);
806 if (search) {
807 from = strdup(search);
808 if (from == NULL) {
809 free(tmp);
810 return 0;
811 }
812 } else {
813 from = NULL;
814 free(tmp);
815 return (-1);
816 }
817 }
818 cmd++; /* shift after delim */
819 if (!*cmd)
820 continue;
821
822 size = 16;
823 with = realloc(to, size);
824 if (with == NULL) {
825 free(to);
826 free(tmp);
827 return -1;
828 }
829 len = 0;
830 from_len = strlen(from);
831 for (; *cmd && *cmd != delim; cmd++) {
832 if (len + from_len + 1 >= size) {
833 char *nwith;
834 size += from_len + 1;
835 nwith = realloc(with, size);
836 if (nwith == NULL) {
837 free(with);
838 free(tmp);
839 return -1;
840 }
841 with = nwith;
842 }
843 if (*cmd == '&') {
844 /* safe */
845 (void)strcpy(&with[len], from);
846 len += from_len;
847 continue;
848 }
849 if (*cmd == '\\'
850 && (*(cmd + 1) == delim
851 || *(cmd + 1) == '&'))
852 cmd++;
853 with[len++] = *cmd;
854 }
855 with[len] = '\0';
856 to = with;
857 }
858
859 aptr = _rl_compat_sub(tmp, from, to, g_on);
860 if (aptr) {
861 free(tmp);
862 tmp = aptr;
863 }
864 g_on = 0;
865 }
866 }
867 *result = tmp;
868 return (p_on? 2:1);
869}
870
871
872/*
873 * csh-style history expansion
874 */
875int
876history_expand(char *str, char **output)
877{
878 int ret = 0;
879 size_t idx, i, size;
880 char *tmp, *result;
881
882 if (h == NULL || e == NULL)
883 rl_initialize();
884
885 if (history_expansion_char == 0) {
886 *output = strdup(str);
887 return(0);
888 }
889
890 *output = NULL;
891 if (str[0] == history_subst_char) {
892 /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
893 *output = malloc(strlen(str) + 4 + 1);
894 if (*output == NULL)
895 return 0;
896 (*output)[0] = (*output)[1] = history_expansion_char;
897 (*output)[2] = ':';
898 (*output)[3] = 's';
899 (void)strcpy((*output) + 4, str);
900 str = *output;
901 } else {
902 *output = strdup(str);
903 if (*output == NULL)
904 return 0;
905 }
906
907#define ADD_STRING(what, len, fr) \
908 { \
909 if (idx + len + 1 > size) { \
910 char *nresult = realloc(result, (size += len + 1));\
911 if (nresult == NULL) { \
912 free(*output); \
913 if (/*CONSTCOND*/fr) \
914 free(tmp); \
915 return 0; \
916 } \
917 result = nresult; \
918 } \
919 (void)strncpy(&result[idx], what, len); \
920 idx += len; \
921 result[idx] = '\0'; \
922 }
923
924 result = NULL;
925 size = idx = 0;
926 tmp = NULL;
927 for (i = 0; str[i];) {
928 int qchar, loop_again;
929 size_t len, start, j;
930
931 qchar = 0;
932 loop_again = 1;
933 start = j = i;
934loop:
935 for (; str[j]; j++) {
936 if (str[j] == '\\' &&
937 str[j + 1] == history_expansion_char) {
938 (void)strcpy(&str[j], &str[j + 1]);
939 continue;
940 }
941 if (!loop_again) {
942 if (isspace((unsigned char) str[j])
943 || str[j] == qchar)
944 break;
945 }
946 if (str[j] == history_expansion_char
947 && !strchr(history_no_expand_chars, str[j + 1])
948 && (!history_inhibit_expansion_function ||
949 (*history_inhibit_expansion_function)(str,
950 (int)j) == 0))
951 break;
952 }
953
954 if (str[j] && loop_again) {
955 i = j;
956 qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
957 j++;
958 if (str[j] == history_expansion_char)
959 j++;
960 loop_again = 0;
961 goto loop;
962 }
963 len = i - start;
964 ADD_STRING(&str[start], len, 0);
965
966 if (str[i] == '\0' || str[i] != history_expansion_char) {
967 len = j - i;
968 ADD_STRING(&str[i], len, 0);
969 if (start == 0)
970 ret = 0;
971 else
972 ret = 1;
973 break;
974 }
975 ret = _history_expand_command (str, i, (j - i), &tmp);
976 if (ret > 0 && tmp) {
977 len = strlen(tmp);
978 ADD_STRING(tmp, len, 1);
979 }
980 if (tmp) {
981 free(tmp);
982 tmp = NULL;
983 }
984 i = j;
985 }
986
987 /* ret is 2 for "print only" option */
988 if (ret == 2) {
989 add_history(result);
990#ifdef GDB_411_HACK
991 /* gdb 4.11 has been shipped with readline, where */
992 /* history_expand() returned -1 when the line */
993 /* should not be executed; in readline 2.1+ */
994 /* it should return 2 in such a case */
995 ret = -1;
996#endif
997 }
998 free(*output);
999 *output = result;
1000
1001 return (ret);
1002}
1003
1004/*
1005* Return a string consisting of arguments of "str" from "start" to "end".
1006*/
1007char *
1008history_arg_extract(int start, int end, const char *str)
1009{
1010 size_t i, len, max;
1011 char **arr, *result = NULL;
1012
1013 arr = history_tokenize(str);
1014 if (!arr)
1015 return NULL;
1016 if (arr && *arr == NULL)
1017 goto out;
1018
1019 for (max = 0; arr[max]; max++)
1020 continue;
1021 max--;
1022
1023 if (start == '$')
1024 start = (int)max;
1025 if (end == '$')
1026 end = (int)max;
1027 if (end < 0)
1028 end = (int)max + end + 1;
1029 if (start < 0)
1030 start = end;
1031
1032 if (start < 0 || end < 0 || (size_t)start > max ||
1033 (size_t)end > max || start > end)
1034 goto out;
1035
1036 for (i = start, len = 0; i <= (size_t)end; i++)
1037 len += strlen(arr[i]) + 1;
1038 len++;
1039 result = malloc(len);
1040 if (result == NULL)
1041 goto out;
1042
1043 for (i = start, len = 0; i <= (size_t)end; i++) {
1044 (void)strcpy(result + len, arr[i]);
1045 len += strlen(arr[i]);
1046 if (i < (size_t)end)
1047 result[len++] = ' ';
1048 }
1049 result[len] = '\0';
1050
1051out:
1052 for (i = 0; arr[i]; i++)
1053 free(arr[i]);
1054 free(arr);
1055
1056 return result;
1057}
1058
1059/*
1060 * Parse the string into individual tokens,
1061 * similar to how shell would do it.
1062 */
1063char **
1064history_tokenize(const char *str)
1065{
1066 int size = 1, idx = 0, i, start;
1067 size_t len;
1068 char **result = NULL, *temp, delim = '\0';
1069
1070 for (i = 0; str[i];) {
1071 while (isspace((unsigned char) str[i]))
1072 i++;
1073 start = i;
1074 for (; str[i];) {
1075 if (str[i] == '\\') {
1076 if (str[i+1] != '\0')
1077 i++;
1078 } else if (str[i] == delim)
1079 delim = '\0';
1080 else if (!delim &&
1081 (isspace((unsigned char) str[i]) ||
1082 strchr("()<>;&|$", str[i])))
1083 break;
1084 else if (!delim && strchr("'`\"", str[i]))
1085 delim = str[i];
1086 if (str[i])
1087 i++;
1088 }
1089
1090 if (idx + 2 >= size) {
1091 char **nresult;
1092 size <<= 1;
1093 nresult = realloc(result, size * sizeof(char *));
1094 if (nresult == NULL) {
1095 free(result);
1096 return NULL;
1097 }
1098 result = nresult;
1099 }
1100 len = i - start;
1101 temp = malloc(len + 1);
1102 if (temp == NULL) {
1103 for (i = 0; i < idx; i++)
1104 free(result[i]);
1105 free(result);
1106 return NULL;
1107 }
1108 (void)strncpy(temp, &str[start], len);
1109 temp[len] = '\0';
1110 result[idx++] = temp;
1111 result[idx] = NULL;
1112 if (str[i])
1113 i++;
1114 }
1115 return (result);
1116}
1117
1118
1119/*
1120 * limit size of history record to ``max'' events
1121 */
1122void
1123stifle_history(int max)
1124{
1125 HistEvent ev;
1126
1127 if (h == NULL || e == NULL)
1128 rl_initialize();
1129
1130 if (history(h, &ev, H_SETSIZE, max) == 0)
1131 max_input_history = max;
1132}
1133
1134
1135/*
1136 * "unlimit" size of history - set the limit to maximum allowed int value
1137 */
1138int
1139unstifle_history(void)
1140{
1141 HistEvent ev;
1142 int omax;
1143
1144 history(h, &ev, H_SETSIZE, INT_MAX);
1145 omax = max_input_history;
1146 max_input_history = INT_MAX;
1147 return (omax); /* some value _must_ be returned */
1148}
1149
1150
1151int
1152history_is_stifled(void)
1153{
1154
1155 /* cannot return true answer */
1156 return (max_input_history != INT_MAX);
1157}
1158
1159static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
1160
1161int
1162history_truncate_file (const char *filename, int nlines)
1163{
1164 int ret = 0;
1165 FILE *fp, *tp;
1166 char template[sizeof(_history_tmp_template)];
1167 char buf[4096];
1168 int fd;
1169 char *cp;
1170 off_t off;
1171 int count = 0;
1172 ssize_t left = 0;
1173
1174 if (filename == NULL && (filename = _default_history_file()) == NULL)
1175 return errno;
1176 if ((fp = fopen(filename, "r+")) == NULL)
1177 return errno;
1178 strcpy(template, _history_tmp_template);
1179 if ((fd = mkstemp(template)) == -1) {
1180 ret = errno;
1181 goto out1;
1182 }
1183
1184 if ((tp = fdopen(fd, "r+")) == NULL) {
1185 close(fd);
1186 ret = errno;
1187 goto out2;
1188 }
1189
1190 for(;;) {
1191 if (fread(buf, sizeof(buf), 1, fp) != 1) {
1192 if (ferror(fp)) {
1193 ret = errno;
1194 break;
1195 }
1196 if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
1197 (off_t)-1) {
1198 ret = errno;
1199 break;
1200 }
1201 left = fread(buf, 1, sizeof(buf), fp);
1202 if (ferror(fp)) {
1203 ret = errno;
1204 break;
1205 }
1206 if (left == 0) {
1207 count--;
1208 left = sizeof(buf);
1209 } else if (fwrite(buf, (size_t)left, 1, tp) != 1) {
1210 ret = errno;
1211 break;
1212 }
1213 fflush(tp);
1214 break;
1215 }
1216 if (fwrite(buf, sizeof(buf), 1, tp) != 1) {
1217 ret = errno;
1218 break;
1219 }
1220 count++;
1221 }
1222 if (ret)
1223 goto out3;
1224 cp = buf + left - 1;
1225 if(*cp != '\n')
1226 cp++;
1227 for(;;) {
1228 while (--cp >= buf) {
1229 if (*cp == '\n') {
1230 if (--nlines == 0) {
1231 if (++cp >= buf + sizeof(buf)) {
1232 count++;
1233 cp = buf;
1234 }
1235 break;
1236 }
1237 }
1238 }
1239 if (nlines <= 0 || count == 0)
1240 break;
1241 count--;
1242 if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
1243 ret = errno;
1244 break;
1245 }
1246 if (fread(buf, sizeof(buf), 1, tp) != 1) {
1247 if (ferror(tp)) {
1248 ret = errno;
1249 break;
1250 }
1251 ret = EAGAIN;
1252 break;
1253 }
1254 cp = buf + sizeof(buf);
1255 }
1256
1257 if (ret || nlines > 0)
1258 goto out3;
1259
1260 if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) {
1261 ret = errno;
1262 goto out3;
1263 }
1264
1265 if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
1266 (off_t)-1) {
1267 ret = errno;
1268 goto out3;
1269 }
1270
1271 for(;;) {
1272 if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) {
1273 if (ferror(fp))
1274 ret = errno;
1275 break;
1276 }
1277 if (fwrite(buf, (size_t)left, 1, fp) != 1) {
1278 ret = errno;
1279 break;
1280 }
1281 }
1282 fflush(fp);
1283 if((off = ftello(fp)) > 0)
1284 (void)ftruncate(fileno(fp), off);
1285out3:
1286 fclose(tp);
1287out2:
1288 unlink(template);
1289out1:
1290 fclose(fp);
1291
1292 return ret;
1293}
1294
1295
1296/*
1297 * read history from a file given
1298 */
1299int
1300read_history(const char *filename)
1301{
1302 HistEvent ev;
1303
1304 if (h == NULL || e == NULL)
1305 rl_initialize();
1306 if (filename == NULL && (filename = _default_history_file()) == NULL)
1307 return errno;
1308 return (history(h, &ev, H_LOAD, filename) == -1 ?
1309 (errno ? errno : EINVAL) : 0);
1310}
1311
1312
1313/*
1314 * write history to a file given
1315 */
1316int
1317write_history(const char *filename)
1318{
1319 HistEvent ev;
1320
1321 if (h == NULL || e == NULL)
1322 rl_initialize();
1323 if (filename == NULL && (filename = _default_history_file()) == NULL)
1324 return errno;
1325 return (history(h, &ev, H_SAVE, filename) == -1 ?
1326 (errno ? errno : EINVAL) : 0);
1327}
1328
1329
1330/*
1331 * returns history ``num''th event
1332 *
1333 * returned pointer points to static variable
1334 */
1335HIST_ENTRY *
1336history_get(int num)
1337{
1338 static HIST_ENTRY she;
1339 HistEvent ev;
1340 int curr_num;
1341
1342 if (h == NULL || e == NULL)
1343 rl_initialize();
1344
1345 /* save current position */
1346 if (history(h, &ev, H_CURR) != 0)
1347 return (NULL);
1348 curr_num = ev.num;
1349
1350 /* start from the oldest */
1351 if (history(h, &ev, H_LAST) != 0)
1352 return (NULL); /* error */
1353
1354 /* look forwards for event matching specified offset */
1355 if (history(h, &ev, H_NEXT_EVDATA, num, &she.data))
1356 return (NULL);
1357
1358 she.line = ev.str;
1359
1360 /* restore pointer to where it was */
1361 (void)history(h, &ev, H_SET, curr_num);
1362
1363 return (&she);
1364}
1365
1366
1367/*
1368 * add the line to history table
1369 */
1370int
1371add_history(const char *line)
1372{
1373 HistEvent ev;
1374
1375 if (h == NULL || e == NULL)
1376 rl_initialize();
1377
1378 (void)history(h, &ev, H_ENTER, line);
1379 if (history(h, &ev, H_GETSIZE) == 0)
1380 history_length = ev.num;
1381
1382 return (!(history_length > 0)); /* return 0 if all is okay */
1383}
1384
1385
1386/*
1387 * remove the specified entry from the history list and return it.
1388 */
1389HIST_ENTRY *
1390remove_history(int num)
1391{
1392 HIST_ENTRY *he;
1393 HistEvent ev;
1394
1395 if (h == NULL || e == NULL)
1396 rl_initialize();
1397
1398 if ((he = malloc(sizeof(*he))) == NULL)
1399 return NULL;
1400
1401 if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1402 free(he);
1403 return NULL;
1404 }
1405
1406 he->line = ev.str;
1407 if (history(h, &ev, H_GETSIZE) == 0)
1408 history_length = ev.num;
1409
1410 return he;
1411}
1412
1413
1414/*
1415 * replace the line and data of the num-th entry
1416 */
1417HIST_ENTRY *
1418replace_history_entry(int num, const char *line, histdata_t data)
1419{
1420 HIST_ENTRY *he;
1421 HistEvent ev;
1422 int curr_num;
1423
1424 if (h == NULL || e == NULL)
1425 rl_initialize();
1426
1427 /* save current position */
1428 if (history(h, &ev, H_CURR) != 0)
1429 return NULL;
1430 curr_num = ev.num;
1431
1432 /* start from the oldest */
1433 if (history(h, &ev, H_LAST) != 0)
1434 return NULL; /* error */
1435
1436 if ((he = malloc(sizeof(*he))) == NULL)
1437 return NULL;
1438
1439 /* look forwards for event matching specified offset */
1440 if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1441 goto out;
1442
1443 he->line = strdup(ev.str);
1444 if (he->line == NULL)
1445 goto out;
1446
1447 if (history(h, &ev, H_REPLACE, line, data))
1448 goto out;
1449
1450 /* restore pointer to where it was */
1451 if (history(h, &ev, H_SET, curr_num))
1452 goto out;
1453
1454 return he;
1455out:
1456 free(he);
1457 return NULL;
1458}
1459
1460/*
1461 * clear the history list - delete all entries
1462 */
1463void
1464clear_history(void)
1465{
1466 HistEvent ev;
1467
1468 (void)history(h, &ev, H_CLEAR);
1469 history_length = 0;
1470}
1471
1472
1473/*
1474 * returns offset of the current history event
1475 */
1476int
1477where_history(void)
1478{
1479 HistEvent ev;
1480 int curr_num, off;
1481
1482 if (history(h, &ev, H_CURR) != 0)
1483 return (0);
1484 curr_num = ev.num;
1485
1486 (void)history(h, &ev, H_FIRST);
1487 off = 1;
1488 while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1489 off++;
1490
1491 return (off);
1492}
1493
1494
1495/*
1496 * returns current history event or NULL if there is no such event
1497 */
1498HIST_ENTRY *
1499current_history(void)
1500{
1501
1502 return (_move_history(H_CURR));
1503}
1504
1505
1506/*
1507 * returns total number of bytes history events' data are using
1508 */
1509int
1510history_total_bytes(void)
1511{
1512 HistEvent ev;
1513 int curr_num;
1514 size_t size;
1515
1516 if (history(h, &ev, H_CURR) != 0)
1517 return (-1);
1518 curr_num = ev.num;
1519
1520 (void)history(h, &ev, H_FIRST);
1521 size = 0;
1522 do
1523 size += strlen(ev.str) * sizeof(*ev.str);
1524 while (history(h, &ev, H_NEXT) == 0);
1525
1526 /* get to the same position as before */
1527 history(h, &ev, H_PREV_EVENT, curr_num);
1528
1529 return (int)(size);
1530}
1531
1532
1533/*
1534 * sets the position in the history list to ``pos''
1535 */
1536int
1537history_set_pos(int pos)
1538{
1539 HistEvent ev;
1540 int curr_num;
1541
1542 if (pos >= history_length || pos < 0)
1543 return (-1);
1544
1545 (void)history(h, &ev, H_CURR);
1546 curr_num = ev.num;
1547
1548 /*
1549 * use H_DELDATA to set to nth history (without delete) by passing
1550 * (void **)-1
1551 */
1552 if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
1553 (void)history(h, &ev, H_SET, curr_num);
1554 return(-1);
1555 }
1556 return (0);
1557}
1558
1559
1560/*
1561 * returns previous event in history and shifts pointer accordingly
1562 */
1563HIST_ENTRY *
1564previous_history(void)
1565{
1566
1567 return (_move_history(H_PREV));
1568}
1569
1570
1571/*
1572 * returns next event in history and shifts pointer accordingly
1573 */
1574HIST_ENTRY *
1575next_history(void)
1576{
1577
1578 return (_move_history(H_NEXT));
1579}
1580
1581
1582/*
1583 * searches for first history event containing the str
1584 */
1585int
1586history_search(const char *str, int direction)
1587{
1588 HistEvent ev;
1589 const char *strp;
1590 int curr_num;
1591
1592 if (history(h, &ev, H_CURR) != 0)
1593 return (-1);
1594 curr_num = ev.num;
1595
1596 for (;;) {
1597 if ((strp = strstr(ev.str, str)) != NULL)
1598 return (int) (strp - ev.str);
1599 if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1600 break;
1601 }
1602 (void)history(h, &ev, H_SET, curr_num);
1603 return (-1);
1604}
1605
1606
1607/*
1608 * searches for first history event beginning with str
1609 */
1610int
1611history_search_prefix(const char *str, int direction)
1612{
1613 HistEvent ev;
1614
1615 return (history(h, &ev, direction < 0 ?
1616 H_PREV_STR : H_NEXT_STR, str));
1617}
1618
1619
1620/*
1621 * search for event in history containing str, starting at offset
1622 * abs(pos); continue backward, if pos<0, forward otherwise
1623 */
1624/* ARGSUSED */
1625int
1626history_search_pos(const char *str,
1627 int direction __attribute__((__unused__)), int pos)
1628{
1629 HistEvent ev;
1630 int curr_num, off;
1631
1632 off = (pos > 0) ? pos : -pos;
1633 pos = (pos > 0) ? 1 : -1;
1634
1635 if (history(h, &ev, H_CURR) != 0)
1636 return (-1);
1637 curr_num = ev.num;
1638
1639 if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1640 return (-1);
1641
1642 for (;;) {
1643 if (strstr(ev.str, str))
1644 return (off);
1645 if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1646 break;
1647 }
1648
1649 /* set "current" pointer back to previous state */
1650 (void)history(h, &ev,
1651 pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1652
1653 return (-1);
1654}
1655
1656
1657/********************************/
1658/* completion functions */
1659
1660char *
1661tilde_expand(char *name)
1662{
1663 return fn_tilde_expand(name);
1664}
1665
1666char *
1667filename_completion_function(const char *name, int state)
1668{
1669 return fn_filename_completion_function(name, state);
1670}
1671
1672/*
1673 * a completion generator for usernames; returns _first_ username
1674 * which starts with supplied text
1675 * text contains a partial username preceded by random character
1676 * (usually '~'); state is ignored
1677 * it's callers responsibility to free returned value
1678 */
1679char *
1680username_completion_function(const char *text, int state)
1681{
1682 struct passwd *pwd;
1683
1684 if (text[0] == '\0')
1685 return (NULL);
1686
1687 if (*text == '~')
1688 text++;
1689
1690 if (state == 0)
1691 setpwent();
1692
1693 while ((pwd = getpwent())
1694 && pwd != NULL && text[0] == pwd->pw_name[0]
1695 && strcmp(text, pwd->pw_name) == 0);
1696
1697 if (pwd == NULL) {
1698 endpwent();
1699 return NULL;
1700 }
1701 return strdup(pwd->pw_name);
1702}
1703
1704
1705/*
1706 * el-compatible wrapper to send TSTP on ^Z
1707 */
1708/* ARGSUSED */
1709static unsigned char
1710_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
1711{
1712 (void)kill(0, SIGTSTP);
1713 return CC_NORM;
1714}
1715
1716/*
1717 * Display list of strings in columnar format on readline's output stream.
1718 * 'matches' is list of strings, 'len' is number of strings in 'matches',
1719 * 'max' is maximum length of string in 'matches'.
1720 */
1721void
1722rl_display_match_list(char **matches, int len, int max)
1723{
1724
1725 fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1726}
1727
1728static const char *
1729/*ARGSUSED*/
1730_rl_completion_append_character_function(const char *dummy
1731 __attribute__((__unused__)))
1732{
1733 static char buf[2];
1734 buf[0] = rl_completion_append_character;
1735 buf[1] = '\0';
1736 return buf;
1737}
1738
1739
1740/*
1741 * complete word at current point
1742 */
1743/* ARGSUSED */
1744int
1745rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1746{
1747#ifdef WIDECHAR
1748 static ct_buffer_t wbreak_conv, sprefix_conv;
1749#endif
1750
1751 if (h == NULL || e == NULL)
1752 rl_initialize();
1753
1754 if (rl_inhibit_completion) {
1755 char arr[2];
1756 arr[0] = (char)invoking_key;
1757 arr[1] = '\0';
1758 el_insertstr(e, arr);
1759 return (CC_REFRESH);
1760 }
1761
1762 /* Just look at how many global variables modify this operation! */
1763 return fn_complete(e,
1764 (CPFunction *)rl_completion_entry_function,
1765 rl_attempted_completion_function,
1766 ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1767 ct_decode_string(rl_special_prefixes, &sprefix_conv),
1768 _rl_completion_append_character_function,
1769 (size_t)rl_completion_query_items,
1770 &rl_completion_type, &rl_attempted_completion_over,
1771 &rl_point, &rl_end);
1772
1773
1774}
1775
1776
1777/* ARGSUSED */
1778static unsigned char
1779_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
1780{
1781 return (unsigned char)rl_complete(0, ch);
1782}
1783
1784/*
1785 * misc other functions
1786 */
1787
1788/*
1789 * bind key c to readline-type function func
1790 */
1791int
1792rl_bind_key(int c, rl_command_func_t *func)
1793{
1794 int retval = -1;
1795
1796 if (h == NULL || e == NULL)
1797 rl_initialize();
1798
1799 if (func == rl_insert) {
1800 /* XXX notice there is no range checking of ``c'' */
1801 e->el_map.key[c] = ED_INSERT;
1802 retval = 0;
1803 }
1804 return (retval);
1805}
1806
1807
1808/*
1809 * read one key from input - handles chars pushed back
1810 * to input stream also
1811 */
1812int
1813rl_read_key(void)
1814{
1815 char fooarr[2 * sizeof(int)];
1816
1817 if (e == NULL || h == NULL)
1818 rl_initialize();
1819
1820 return (el_getc(e, fooarr));
1821}
1822
1823
1824/*
1825 * reset the terminal
1826 */
1827/* ARGSUSED */
1828void
1829rl_reset_terminal(const char *p __attribute__((__unused__)))
1830{
1831
1832 if (h == NULL || e == NULL)
1833 rl_initialize();
1834 el_reset(e);
1835}
1836
1837
1838/*
1839 * insert character ``c'' back into input stream, ``count'' times
1840 */
1841int
1842rl_insert(int count, int c)
1843{
1844 char arr[2];
1845
1846 if (h == NULL || e == NULL)
1847 rl_initialize();
1848
1849 /* XXX - int -> char conversion can lose on multichars */
1850 arr[0] = c;
1851 arr[1] = '\0';
1852
1853 for (; count > 0; count--)
1854 el_push(e, arr);
1855
1856 return (0);
1857}
1858
1859int
1860rl_insert_text(const char *text)
1861{
1862 if (!text || *text == 0)
1863 return (0);
1864
1865 if (h == NULL || e == NULL)
1866 rl_initialize();
1867
1868 if (el_insertstr(e, text) < 0)
1869 return (0);
1870 return (int)strlen(text);
1871}
1872
1873/*ARGSUSED*/
1874int
1875rl_newline(int count, int c)
1876{
1877 /*
1878 * Readline-4.0 appears to ignore the args.
1879 */
1880 return rl_insert(1, '\n');
1881}
1882
1883/*ARGSUSED*/
1884static unsigned char
1885rl_bind_wrapper(EditLine *el, unsigned char c)
1886{
1887 if (map[c] == NULL)
1888 return CC_ERROR;
1889
1890 _rl_update_pos();
1891
1892 (*map[c])(NULL, c);
1893
1894 /* If rl_done was set by the above call, deal with it here */
1895 if (rl_done)
1896 return CC_EOF;
1897
1898 return CC_NORM;
1899}
1900
1901int
1902rl_add_defun(const char *name, Function *fun, int c)
1903{
1904 char dest[8];
1905 if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1906 return -1;
1907 map[(unsigned char)c] = fun;
1908 el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1909 vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1910 el_set(e, EL_BIND, dest, name);
1911 return 0;
1912}
1913
1914void
1915rl_callback_read_char()
1916{
1917 int count = 0, done = 0;
1918 const char *buf = el_gets(e, &count);
1919 char *wbuf;
1920
1921 if (buf == NULL || count-- <= 0)
1922 return;
1923 if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1924 done = 1;
1925 if (buf[count] == '\n' || buf[count] == '\r')
1926 done = 2;
1927
1928 if (done && rl_linefunc != NULL) {
1929 el_set(e, EL_UNBUFFERED, 0);
1930 if (done == 2) {
1931 if ((wbuf = strdup(buf)) != NULL)
1932 wbuf[count] = '\0';
1933 } else
1934 wbuf = NULL;
1935 (*(void (*)(const char *))rl_linefunc)(wbuf);
1936 //el_set(e, EL_UNBUFFERED, 1);
1937 }
1938}
1939
1940void
1941rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1942{
1943 if (e == NULL) {
1944 rl_initialize();
1945 }
1946 (void)rl_set_prompt(prompt);
1947 rl_linefunc = linefunc;
1948 el_set(e, EL_UNBUFFERED, 1);
1949}
1950
1951void
1952rl_callback_handler_remove(void)
1953{
1954 el_set(e, EL_UNBUFFERED, 0);
1955 rl_linefunc = NULL;
1956}
1957
1958void
1959rl_redisplay(void)
1960{
1961 char a[2];
1962 a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
1963 a[1] = '\0';
1964 el_push(e, a);
1965}
1966
1967int
1968rl_get_previous_history(int count, int key)
1969{
1970 char a[2];
1971 a[0] = key;
1972 a[1] = '\0';
1973 while (count--)
1974 el_push(e, a);
1975 return 0;
1976}
1977
1978void
1979/*ARGSUSED*/
1980rl_prep_terminal(int meta_flag)
1981{
1982 el_set(e, EL_PREP_TERM, 1);
1983}
1984
1985void
1986rl_deprep_terminal(void)
1987{
1988 el_set(e, EL_PREP_TERM, 0);
1989}
1990
1991int
1992rl_read_init_file(const char *s)
1993{
1994 return(el_source(e, s));
1995}
1996
1997int
1998rl_parse_and_bind(const char *line)
1999{
2000 const char **argv;
2001 int argc;
2002 Tokenizer *tok;
2003
2004 tok = tok_init(NULL);
2005 tok_str(tok, line, &argc, &argv);
2006 argc = el_parse(e, argc, argv);
2007 tok_end(tok);
2008 return (argc ? 1 : 0);
2009}
2010
2011int
2012rl_variable_bind(const char *var, const char *value)
2013{
2014 /*
2015 * The proper return value is undocument, but this is what the
2016 * readline source seems to do.
2017 */
2018 return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
2019}
2020
2021void
2022rl_stuff_char(int c)
2023{
2024 char buf[2];
2025
2026 buf[0] = c;
2027 buf[1] = '\0';
2028 el_insertstr(e, buf);
2029}
2030
2031static int
2032_rl_event_read_char(EditLine *el, char *cp)
2033{
2034 int n;
2035 ssize_t num_read = 0;
2036
2037 *cp = '\0';
2038 while (rl_event_hook) {
2039
2040 (*rl_event_hook)();
2041
2042#if defined(FIONREAD)
2043 if (ioctl(el->el_infd, FIONREAD, &n) < 0)
2044 return(-1);
2045 if (n)
2046 num_read = read(el->el_infd, cp, 1);
2047 else
2048 num_read = 0;
2049#elif defined(F_SETFL) && defined(O_NDELAY)
2050 if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
2051 return(-1);
2052 if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
2053 return(-1);
2054 num_read = read(el->el_infd, cp, 1);
2055 if (fcntl(el->el_infd, F_SETFL, n))
2056 return(-1);
2057#else
2058 /* not non-blocking, but what you gonna do? */
2059 num_read = read(el->el_infd, cp, 1);
2060 return(-1);
2061#endif
2062
2063 if (num_read < 0 && errno == EAGAIN)
2064 continue;
2065 if (num_read == 0)
2066 continue;
2067 break;
2068 }
2069 if (!rl_event_hook)
2070 el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
2071 return (int)num_read;
2072}
2073
2074static void
2075_rl_update_pos(void)
2076{
2077 const LineInfo *li = el_line(e);
2078
2079 rl_point = (int)(li->cursor - li->buffer);
2080 rl_end = (int)(li->lastchar - li->buffer);
2081}
2082
2083void
2084rl_get_screen_size(int *rows, int *cols)
2085{
2086 if (rows)
2087 el_get(e, EL_GETTC, "li", rows);
2088 if (cols)
2089 el_get(e, EL_GETTC, "co", cols);
2090}
2091
2092void
2093rl_set_screen_size(int rows, int cols)
2094{
2095 char buf[64];
2096 (void)snprintf(buf, sizeof(buf), "%d", rows);
2097 el_set(e, EL_SETTC, "li", buf);
2098 (void)snprintf(buf, sizeof(buf), "%d", cols);
2099 el_set(e, EL_SETTC, "co", buf);
2100}
2101
2102char **
2103rl_completion_matches(const char *str, rl_compentry_func_t *fun)
2104{
2105 size_t len, max, i, j, min;
2106 char **list, *match, *a, *b;
2107
2108 len = 1;
2109 max = 10;
2110 if ((list = malloc(max * sizeof(*list))) == NULL)
2111 return NULL;
2112
2113 while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
2114 list[len++] = match;
2115 if (len == max) {
2116 char **nl;
2117 max += 10;
2118 if ((nl = realloc(list, max * sizeof(*nl))) == NULL)
2119 goto out;
2120 list = nl;
2121 }
2122 }
2123 if (len == 1)
2124 goto out;
2125 list[len] = NULL;
2126 if (len == 2) {
2127 if ((list[0] = strdup(list[1])) == NULL)
2128 goto out;
2129 return list;
2130 }
2131 qsort(&list[1], len - 1, sizeof(*list),
2132 (int (*)(const void *, const void *)) strcmp);
2133 min = SIZE_T_MAX;
2134 for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
2135 b = list[i + 1];
2136 for (j = 0; a[j] && a[j] == b[j]; j++)
2137 continue;
2138 if (min > j)
2139 min = j;
2140 }
2141 if (min == 0 && *str) {
2142 if ((list[0] = strdup(str)) == NULL)
2143 goto out;
2144 } else {
2145 if ((list[0] = malloc(min + 1)) == NULL)
2146 goto out;
2147 (void)memcpy(list[0], list[1], min);
2148 list[0][min] = '\0';
2149 }
2150 return list;
2151
2152out:
2153 free(list);
2154 return NULL;
2155}
2156
2157char *
2158rl_filename_completion_function (const char *text, int state)
2159{
2160 return fn_filename_completion_function(text, state);
2161}
2162
2163void
2164rl_forced_update_display(void)
2165{
2166 el_set(e, EL_REFRESH);
2167}
2168
2169int
2170_rl_abort_internal(void)
2171{
2172 el_beep(e);
2173 longjmp(topbuf, 1);
2174 /*NOTREACHED*/
2175}
2176
2177int
2178_rl_qsort_string_compare(char **s1, char **s2)
2179{
2180 return strcoll(*s1, *s2);
2181}
2182
2183HISTORY_STATE *
2184history_get_history_state(void)
2185{
2186 HISTORY_STATE *hs;
2187
2188 if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL)
2189 return (NULL);
2190 hs->length = history_length;
2191 return (hs);
2192}
2193
2194int
2195/*ARGSUSED*/
2196rl_kill_text(int from, int to)
2197{
2198 return 0;
2199}
2200
2201Keymap
2202rl_make_bare_keymap(void)
2203{
2204 return NULL;
2205}
2206
2207Keymap
2208rl_get_keymap(void)
2209{
2210 return NULL;
2211}
2212
2213void
2214/*ARGSUSED*/
2215rl_set_keymap(Keymap k)
2216{
2217}
2218
2219int
2220/*ARGSUSED*/
2221rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
2222{
2223 return 0;
2224}
2225
2226int
2227/*ARGSUSED*/
2228rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k)
2229{
2230 return 0;
2231}
2232
2233/* unsupported, but needed by python */
2234void
2235rl_cleanup_after_signal(void)
2236{
2237}
2238
2239int
2240rl_on_new_line(void)
2241{
2242 return 0;
2243}
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