GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libedit/readline.c Lines: 140 935 15.0 %
Date: 2017-11-13 Branches: 53 751 7.1 %

Line Branch Exec Source
1
/*	$OpenBSD: readline.c,v 1.27 2016/05/31 16:12:00 schwarze Exp $	*/
2
/*	$NetBSD: readline.c,v 1.91 2010/08/28 15:44:59 christos Exp $	*/
3
4
/*-
5
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
6
 * All rights reserved.
7
 *
8
 * This code is derived from software contributed to The NetBSD Foundation
9
 * by Jaromir Dolecek.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30
 * POSSIBILITY OF SUCH DAMAGE.
31
 */
32
33
#include "config.h"
34
35
#include <sys/types.h>
36
#include <sys/stat.h>
37
#include <ctype.h>
38
#include <dirent.h>
39
#include <errno.h>
40
#include <fcntl.h>
41
#include <limits.h>
42
#include <pwd.h>
43
#include <setjmp.h>
44
#include <stdint.h>
45
#include <stdio.h>
46
#include <stdlib.h>
47
#include <string.h>
48
#include <unistd.h>
49
#ifdef HAVE_VIS_H
50
#include <vis.h>
51
#else
52
#include "np/vis.h"
53
#endif
54
#include "readline/readline.h"
55
#include "el.h"
56
#include "fcns.h"
57
#include "filecomplete.h"
58
59
void rl_prep_terminal(int);
60
void rl_deprep_terminal(void);
61
62
/* for rl_complete() */
63
#define TAB		'\r'
64
65
/* see comment at the #ifdef for sense of this */
66
/* #define GDB_411_HACK */
67
68
/* readline compatibility stuff - look at readline sources/documentation */
69
/* to see what these variables mean */
70
const char *rl_library_version = "EditLine wrapper";
71
int rl_readline_version = RL_READLINE_VERSION;
72
static char empty[] = { '\0' };
73
static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
74
static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
75
    '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
76
char *rl_readline_name = empty;
77
FILE *rl_instream = NULL;
78
FILE *rl_outstream = NULL;
79
int rl_point = 0;
80
int rl_end = 0;
81
char *rl_line_buffer = NULL;
82
VCPFunction *rl_linefunc = NULL;
83
int rl_done = 0;
84
VFunction *rl_event_hook = NULL;
85
KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
86
    emacs_meta_keymap,
87
    emacs_ctlx_keymap;
88
89
int history_base = 1;		/* probably never subject to change */
90
int history_length = 0;
91
int max_input_history = 0;
92
char history_expansion_char = '!';
93
char history_subst_char = '^';
94
char *history_no_expand_chars = expand_chars;
95
Function *history_inhibit_expansion_function = NULL;
96
char *history_arg_extract(int start, int end, const char *str);
97
98
int rl_inhibit_completion = 0;
99
int rl_attempted_completion_over = 0;
100
char *rl_basic_word_break_characters = break_chars;
101
char *rl_completer_word_break_characters = NULL;
102
char *rl_completer_quote_characters = NULL;
103
Function *rl_completion_entry_function = NULL;
104
CPPFunction *rl_attempted_completion_function = NULL;
105
Function *rl_pre_input_hook = NULL;
106
Function *rl_startup1_hook = NULL;
107
int (*rl_getc_function)(FILE *) = NULL;
108
char *rl_terminal_name = NULL;
109
int rl_already_prompted = 0;
110
int rl_filename_completion_desired = 0;
111
int rl_ignore_completion_duplicates = 0;
112
int rl_catch_signals = 1;
113
int readline_echoing_p = 1;
114
int _rl_print_completions_horizontally = 0;
115
VFunction *rl_redisplay_function = NULL;
116
Function *rl_startup_hook = NULL;
117
VFunction *rl_completion_display_matches_hook = NULL;
118
VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
119
VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
120
KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
121
122
/*
123
 * The current prompt string.
124
 */
125
char *rl_prompt = NULL;
126
/*
127
 * This is set to character indicating type of completion being done by
128
 * rl_complete_internal(); this is available for application completion
129
 * functions.
130
 */
131
int rl_completion_type = 0;
132
133
/*
134
 * If more than this number of items results from query for possible
135
 * completions, we ask user if they are sure to really display the list.
136
 */
137
int rl_completion_query_items = 100;
138
139
/*
140
 * List of characters which are word break characters, but should be left
141
 * in the parsed text when it is passed to the completion function.
142
 * Shell uses this to help determine what kind of completing to do.
143
 */
144
char *rl_special_prefixes = NULL;
145
146
/*
147
 * This is the character appended to the completed words if at the end of
148
 * the line. Default is ' ' (a space).
149
 */
150
int rl_completion_append_character = ' ';
151
152
/*
153
 * When the history cursor is on the newest element and next_history()
154
 * is called, GNU readline moves the cursor beyond the newest element.
155
 * The editline library does not provide data structures to express
156
 * that state, so we need a local flag.
157
 */
158
static int current_history_valid = 1;
159
160
/* stuff below is used internally by libedit for readline emulation */
161
162
static History *h = NULL;
163
static EditLine *e = NULL;
164
static Function *map[256];
165
static jmp_buf topbuf;
166
167
/* internal functions */
168
static unsigned char	 _el_rl_complete(EditLine *, int);
169
static unsigned char	 _el_rl_tstp(EditLine *, int);
170
static char		*_get_prompt(EditLine *);
171
static int		 _getc_function(EditLine *, wchar_t *);
172
static HIST_ENTRY	*_move_history(int);
173
static int		 _history_expand_command(const char *, size_t, size_t,
174
    char **);
175
static char		*_rl_compat_sub(const char *, const char *,
176
    const char *, int);
177
static int		 _rl_event_read_char(EditLine *, wchar_t *);
178
static void		 _rl_update_pos(void);
179
180
181
/* ARGSUSED */
182
static char *
183
_get_prompt(EditLine *el __attribute__((__unused__)))
184
{
185
	rl_already_prompted = 1;
186
	return rl_prompt;
187
}
188
189
190
/*
191
 * generic function for moving around history
192
 */
193
static HIST_ENTRY *
194
_move_history(int op)
195
{
196
48
	HistEvent ev;
197
	static HIST_ENTRY rl_he;
198
199
24
	if (history(h, &ev, op) != 0)
200
6
		return NULL;
201
202
18
	rl_he.line = ev.str;
203
18
	rl_he.data = NULL;
204
205
18
	return &rl_he;
206
24
}
207
208
209
/*
210
 * read one key from user defined input function
211
 */
212
static int
213
/*ARGSUSED*/
214
_getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c)
215
{
216
	int i;
217
218
	i = (*rl_getc_function)(NULL);
219
	if (i == -1)
220
		return 0;
221
	*c = (wchar_t)i;
222
	return 1;
223
}
224
225
static void
226
_resize_fun(EditLine *el, void *a)
227
{
228
	const LineInfo *li;
229
6
	char **ap = a;
230
231
3
	li = el_line(el);
232
	/* a cheesy way to get rid of const cast. */
233
3
	*ap = memchr(li->buffer, *li->buffer, 1);
234
3
}
235
236
static const char _dothistory[] = "/.history";
237
238
static const char *
239
_default_history_file(void)
240
{
241
	struct passwd *p;
242
	static char path[PATH_MAX];
243
244
	if (*path)
245
		return path;
246
	if ((p = getpwuid(getuid())) == NULL)
247
		return NULL;
248
	strlcpy(path, p->pw_dir, PATH_MAX);
249
	strlcat(path, _dothistory, PATH_MAX);
250
	return path;
251
}
252
253
/*
254
 * READLINE compatibility stuff
255
 */
256
257
/*
258
 * Set the prompt
259
 */
260
int
261
rl_set_prompt(const char *prompt)
262
{
263
	char *p;
264
265
6
	if (!prompt)
266
		prompt = "";
267

3
	if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
268
		return 0;
269
3
	if (rl_prompt)
270
		free(rl_prompt);
271
3
	rl_prompt = strdup(prompt);
272
3
	if (rl_prompt == NULL)
273
		return -1;
274
275
6
	while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
276
		*p = RL_PROMPT_START_IGNORE;
277
278
3
	return 0;
279
3
}
280
281
/*
282
 * initialize rl compat stuff
283
 */
284
int
285
rl_initialize(void)
286
{
287
6
	HistEvent ev;
288
	int editmode = 1;
289
3
	struct termios t;
290
291
3
	current_history_valid = 1;
292
293
3
	if (e != NULL)
294
		el_end(e);
295
3
	if (h != NULL)
296
		history_end(h);
297
298
3
	if (!rl_instream)
299
3
		rl_instream = stdin;
300
3
	if (!rl_outstream)
301
3
		rl_outstream = stdout;
302
303
	/*
304
	 * See if we don't really want to run the editor
305
	 */
306

12
	if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
307
		editmode = 0;
308
309
3
	e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
310
311
3
	if (!editmode)
312
		el_set(e, EL_EDITMODE, 0);
313
314
3
	h = history_init();
315
3
	if (!e || !h)
316
		return -1;
317
318
3
	history(h, &ev, H_SETSIZE, INT_MAX);	/* unlimited */
319
3
	history_length = 0;
320
3
	max_input_history = INT_MAX;
321
3
	el_set(e, EL_HIST, history, h);
322
323
	/* Setup resize function */
324
3
	el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
325
326
	/* setup getc function if valid */
327
3
	if (rl_getc_function)
328
		el_set(e, EL_GETCFN, _getc_function);
329
330
	/* for proper prompt printing in readline() */
331
3
	if (rl_set_prompt("") == -1) {
332
		history_end(h);
333
		el_end(e);
334
		return -1;
335
	}
336
3
	el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
337
3
	el_set(e, EL_SIGNAL, rl_catch_signals);
338
339
	/* set default mode to "emacs"-style and read setting afterwards */
340
	/* so this can be overriden */
341
3
	el_set(e, EL_EDITOR, "emacs");
342
3
	if (rl_terminal_name != NULL)
343
		el_set(e, EL_TERMINAL, rl_terminal_name);
344
	else
345
3
		el_get(e, EL_TERMINAL, &rl_terminal_name);
346
347
	/*
348
	 * Word completion - this has to go AFTER rebinding keys
349
	 * to emacs-style.
350
	 */
351
3
	el_set(e, EL_ADDFN, "rl_complete",
352
	    "ReadLine compatible completion function",
353
	    _el_rl_complete);
354
3
	el_set(e, EL_BIND, "^I", "rl_complete", NULL);
355
356
	/*
357
	 * Send TSTP when ^Z is pressed.
358
	 */
359
3
	el_set(e, EL_ADDFN, "rl_tstp",
360
	    "ReadLine compatible suspend function",
361
	    _el_rl_tstp);
362
3
	el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
363
364
	/* read settings from configuration file */
365
3
	el_source(e, NULL);
366
367
	/*
368
	 * Unfortunately, some applications really do use rl_point
369
	 * and rl_line_buffer directly.
370
	 */
371
3
	_resize_fun(e, &rl_line_buffer);
372
3
	_rl_update_pos();
373
374
3
	if (rl_startup_hook)
375
		(*rl_startup_hook)(NULL, 0);
376
377
3
	return 0;
378
3
}
379
380
381
/*
382
 * read one line from input stream and return it, chomping
383
 * trailing newline (if there is any)
384
 */
385
char *
386
readline(const char *p)
387
{
388
	HistEvent ev;
389
	const char * volatile prompt = p;
390
	int count;
391
	const char *ret;
392
	char *buf;
393
	static int used_event_hook;
394
395
	if (e == NULL || h == NULL)
396
		rl_initialize();
397
398
	rl_done = 0;
399
400
	(void)setjmp(topbuf);
401
402
	/* update prompt accordingly to what has been passed */
403
	if (rl_set_prompt(prompt) == -1)
404
		return NULL;
405
406
	if (rl_pre_input_hook)
407
		(*rl_pre_input_hook)(NULL, 0);
408
409
	if (rl_event_hook && !(e->el_flags&NO_TTY)) {
410
		el_set(e, EL_GETCFN, _rl_event_read_char);
411
		used_event_hook = 1;
412
	}
413
414
	if (!rl_event_hook && used_event_hook) {
415
		el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
416
		used_event_hook = 0;
417
	}
418
419
	rl_already_prompted = 0;
420
421
	/* get one line from input stream */
422
	ret = el_gets(e, &count);
423
424
	if (ret && count > 0) {
425
		int lastidx;
426
427
		buf = strdup(ret);
428
		if (buf == NULL)
429
			return NULL;
430
		lastidx = count - 1;
431
		if (buf[lastidx] == '\n')
432
			buf[lastidx] = '\0';
433
	} else
434
		buf = NULL;
435
436
	history(h, &ev, H_GETSIZE);
437
	history_length = ev.num;
438
439
	return buf;
440
}
441
442
/*
443
 * history functions
444
 */
445
446
/*
447
 * is normally called before application starts to use
448
 * history expansion functions
449
 */
450
void
451
using_history(void)
452
{
453
48
	if (h == NULL || e == NULL)
454
3
		rl_initialize();
455
24
}
456
457
458
/*
459
 * substitute ``what'' with ``with'', returning resulting string; if
460
 * globally == 1, substitutes all occurrences of what, otherwise only the
461
 * first one
462
 */
463
static char *
464
_rl_compat_sub(const char *str, const char *what, const char *with,
465
    int globally)
466
{
467
	const	char	*s;
468
	char	*r, *result;
469
	size_t	len, with_len, what_len;
470
471
	len = strlen(str);
472
	with_len = strlen(with);
473
	what_len = strlen(what);
474
475
	/* calculate length we need for result */
476
	s = str;
477
	while (*s) {
478
		if (*s == *what && !strncmp(s, what, what_len)) {
479
			len += with_len - what_len;
480
			if (!globally)
481
				break;
482
			s += what_len;
483
		} else
484
			s++;
485
	}
486
	r = result = malloc(len + 1);
487
	if (result == NULL)
488
		return NULL;
489
	s = str;
490
	while (*s) {
491
		if (*s == *what && !strncmp(s, what, what_len)) {
492
			(void)strncpy(r, with, with_len);
493
			r += with_len;
494
			s += what_len;
495
			if (!globally) {
496
				(void)strlcpy(r, s, len);
497
				return result;
498
			}
499
		} else
500
			*r++ = *s++;
501
	}
502
	*r = '\0';
503
	return result;
504
}
505
506
static	char	*last_search_pat;	/* last !?pat[?] search pattern */
507
static	char	*last_search_match;	/* last !?pat[?] that matched */
508
509
const char *
510
get_history_event(const char *cmd, int *cindex, int qchar)
511
{
512
	int idx, sign, sub, num, begin, ret;
513
	size_t len;
514
	char	*pat;
515
	const char *rptr;
516
	HistEvent ev;
517
518
	idx = *cindex;
519
	if (cmd[idx++] != history_expansion_char)
520
		return NULL;
521
522
	/* find out which event to take */
523
	if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
524
		if (history(h, &ev, H_FIRST) != 0)
525
			return NULL;
526
		*cindex = cmd[idx]? (idx + 1):idx;
527
		return ev.str;
528
	}
529
	sign = 0;
530
	if (cmd[idx] == '-') {
531
		sign = 1;
532
		idx++;
533
	}
534
535
	if ('0' <= cmd[idx] && cmd[idx] <= '9') {
536
		HIST_ENTRY *rl_he;
537
538
		num = 0;
539
		while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
540
			num = num * 10 + cmd[idx] - '0';
541
			idx++;
542
		}
543
		if (sign)
544
			num = history_length - num + 1;
545
546
		if (!(rl_he = history_get(num)))
547
			return NULL;
548
549
		*cindex = idx;
550
		return rl_he->line;
551
	}
552
	sub = 0;
553
	if (cmd[idx] == '?') {
554
		sub = 1;
555
		idx++;
556
	}
557
	begin = idx;
558
	while (cmd[idx]) {
559
		if (cmd[idx] == '\n')
560
			break;
561
		if (sub && cmd[idx] == '?')
562
			break;
563
		if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
564
				    || cmd[idx] == '\t' || cmd[idx] == qchar))
565
			break;
566
		idx++;
567
	}
568
	len = idx - begin;
569
	if (sub && cmd[idx] == '?')
570
		idx++;
571
	if (sub && len == 0 && last_search_pat && *last_search_pat)
572
		pat = last_search_pat;
573
	else if (len == 0)
574
		return NULL;
575
	else {
576
		if ((pat = malloc(len + 1)) == NULL)
577
			return NULL;
578
		(void)strncpy(pat, cmd + begin, len);
579
		pat[len] = '\0';
580
	}
581
582
	if (history(h, &ev, H_CURR) != 0) {
583
		if (pat != last_search_pat)
584
			free(pat);
585
		return NULL;
586
	}
587
	num = ev.num;
588
589
	if (sub) {
590
		if (pat != last_search_pat) {
591
			if (last_search_pat)
592
				free(last_search_pat);
593
			last_search_pat = pat;
594
		}
595
		ret = history_search(pat, -1);
596
	} else
597
		ret = history_search_prefix(pat, -1);
598
599
	if (ret == -1) {
600
		/* restore to end of list on failed search */
601
		history(h, &ev, H_FIRST);
602
		(void)fprintf(rl_outstream, "%s: Event not found\n", pat);
603
		if (pat != last_search_pat)
604
			free(pat);
605
		return NULL;
606
	}
607
608
	if (sub && len) {
609
		if (last_search_match && last_search_match != pat)
610
			free(last_search_match);
611
		last_search_match = pat;
612
	}
613
614
	if (pat != last_search_pat)
615
		free(pat);
616
617
	if (history(h, &ev, H_CURR) != 0)
618
		return NULL;
619
	*cindex = idx;
620
	rptr = ev.str;
621
622
	/* roll back to original position */
623
	(void)history(h, &ev, H_SET, num);
624
625
	return rptr;
626
}
627
628
/*
629
 * the real function doing history expansion - takes as argument command
630
 * to do and data upon which the command should be executed
631
 * does expansion the way I've understood readline documentation
632
 *
633
 * returns 0 if data was not modified, 1 if it was and 2 if the string
634
 * should be only printed and not executed; in case of error,
635
 * returns -1 and *result points to NULL
636
 * it's the caller's responsibility to free() the string returned in *result
637
 */
638
static int
639
_history_expand_command(const char *command, size_t offs, size_t cmdlen,
640
    char **result)
641
{
642
	char *tmp, *search = NULL, *aptr;
643
	const char *ptr, *cmd;
644
	static char *from = NULL, *to = NULL;
645
	int start, end, idx, has_mods = 0;
646
	int p_on = 0, g_on = 0;
647
648
	*result = NULL;
649
	aptr = NULL;
650
	ptr = NULL;
651
652
	/* First get event specifier */
653
	idx = 0;
654
655
	if (strchr(":^*$", command[offs + 1])) {
656
		char str[4];
657
		/*
658
		* "!:" is shorthand for "!!:".
659
		* "!^", "!*" and "!$" are shorthand for
660
		* "!!:^", "!!:*" and "!!:$" respectively.
661
		*/
662
		str[0] = str[1] = '!';
663
		str[2] = '0';
664
		ptr = get_history_event(str, &idx, 0);
665
		idx = (command[offs + 1] == ':')? 1:0;
666
		has_mods = 1;
667
	} else {
668
		if (command[offs + 1] == '#') {
669
			/* use command so far */
670
			if ((aptr = malloc(offs + 1)) == NULL)
671
				return -1;
672
			(void)strncpy(aptr, command, offs);
673
			aptr[offs] = '\0';
674
			idx = 1;
675
		} else {
676
			int	qchar;
677
678
			qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
679
			ptr = get_history_event(command + offs, &idx, qchar);
680
		}
681
		has_mods = command[offs + idx] == ':';
682
	}
683
684
	if (ptr == NULL && aptr == NULL)
685
		return -1;
686
687
	if (!has_mods) {
688
		*result = strdup(aptr ? aptr : ptr);
689
		if (aptr)
690
			free(aptr);
691
		if (*result == NULL)
692
			return -1;
693
		return 1;
694
	}
695
696
	cmd = command + offs + idx + 1;
697
698
	/* Now parse any word designators */
699
700
	if (*cmd == '%')	/* last word matched by ?pat? */
701
		tmp = strdup(last_search_match? last_search_match:"");
702
	else if (strchr("^*$-0123456789", *cmd)) {
703
		start = end = -1;
704
		if (*cmd == '^')
705
			start = end = 1, cmd++;
706
		else if (*cmd == '$')
707
			start = -1, cmd++;
708
		else if (*cmd == '*')
709
			start = 1, cmd++;
710
	       else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
711
			start = 0;
712
			while (*cmd && '0' <= *cmd && *cmd <= '9')
713
				start = start * 10 + *cmd++ - '0';
714
715
			if (*cmd == '-') {
716
				if (isdigit((unsigned char) cmd[1])) {
717
					cmd++;
718
					end = 0;
719
					while (*cmd && '0' <= *cmd && *cmd <= '9')
720
						end = end * 10 + *cmd++ - '0';
721
				} else if (cmd[1] == '$') {
722
					cmd += 2;
723
					end = -1;
724
				} else {
725
					cmd++;
726
					end = -2;
727
				}
728
			} else if (*cmd == '*')
729
				end = -1, cmd++;
730
			else
731
				end = start;
732
		}
733
		tmp = history_arg_extract(start, end, aptr? aptr:ptr);
734
		if (tmp == NULL) {
735
			(void)fprintf(rl_outstream, "%s: Bad word specifier",
736
			    command + offs + idx);
737
			if (aptr)
738
				free(aptr);
739
			return -1;
740
		}
741
	} else
742
		tmp = strdup(aptr? aptr:ptr);
743
744
	if (aptr)
745
		free(aptr);
746
747
	if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
748
		*result = tmp;
749
		return 1;
750
	}
751
752
	for (; *cmd; cmd++) {
753
		if (*cmd == ':')
754
			continue;
755
		else if (*cmd == 'h') {		/* remove trailing path */
756
			if ((aptr = strrchr(tmp, '/')) != NULL)
757
				*aptr = '\0';
758
		} else if (*cmd == 't') {	/* remove leading path */
759
			if ((aptr = strrchr(tmp, '/')) != NULL) {
760
				aptr = strdup(aptr + 1);
761
				free(tmp);
762
				tmp = aptr;
763
			}
764
		} else if (*cmd == 'r') {	/* remove trailing suffix */
765
			if ((aptr = strrchr(tmp, '.')) != NULL)
766
				*aptr = '\0';
767
		} else if (*cmd == 'e') {	/* remove all but suffix */
768
			if ((aptr = strrchr(tmp, '.')) != NULL) {
769
				aptr = strdup(aptr);
770
				free(tmp);
771
				tmp = aptr;
772
			}
773
		} else if (*cmd == 'p')		/* print only */
774
			p_on = 1;
775
		else if (*cmd == 'g')
776
			g_on = 2;
777
		else if (*cmd == 's' || *cmd == '&') {
778
			char *what, *with, delim;
779
			size_t len, from_len;
780
			size_t size;
781
782
			if (*cmd == '&' && (from == NULL || to == NULL))
783
				continue;
784
			else if (*cmd == 's') {
785
				delim = *(++cmd), cmd++;
786
				size = 16;
787
				what = realloc(from, size);
788
				if (what == NULL) {
789
					free(from);
790
					free(tmp);
791
					return 0;
792
				}
793
				len = 0;
794
				for (; *cmd && *cmd != delim; cmd++) {
795
					if (*cmd == '\\' && cmd[1] == delim)
796
						cmd++;
797
					if (len >= size) {
798
						char *nwhat;
799
						nwhat = reallocarray(what,
800
						    size, 2);
801
						if (nwhat == NULL) {
802
							free(what);
803
							free(tmp);
804
							return 0;
805
						}
806
						size *= 2;
807
						what = nwhat;
808
					}
809
					what[len++] = *cmd;
810
				}
811
				what[len] = '\0';
812
				from = what;
813
				if (*what == '\0') {
814
					free(what);
815
					if (search) {
816
						from = strdup(search);
817
						if (from == NULL) {
818
							free(tmp);
819
							return 0;
820
						}
821
					} else {
822
						from = NULL;
823
						free(tmp);
824
						return -1;
825
					}
826
				}
827
				cmd++;	/* shift after delim */
828
				if (!*cmd)
829
					continue;
830
831
				size = 16;
832
				with = realloc(to, size);
833
				if (with == NULL) {
834
					free(to);
835
					free(tmp);
836
					return -1;
837
				}
838
				len = 0;
839
				from_len = strlen(from);
840
				for (; *cmd && *cmd != delim; cmd++) {
841
					if (len + from_len + 1 >= size) {
842
						char *nwith;
843
						size += from_len + 1;
844
						nwith = realloc(with, size);
845
						if (nwith == NULL) {
846
							free(with);
847
							free(tmp);
848
							return -1;
849
						}
850
						with = nwith;
851
					}
852
					if (*cmd == '&') {
853
						/* safe */
854
						(void)strlcpy(&with[len], from,
855
						    size - len);
856
						len += from_len;
857
						continue;
858
					}
859
					if (*cmd == '\\'
860
					    && (*(cmd + 1) == delim
861
						|| *(cmd + 1) == '&'))
862
						cmd++;
863
					with[len++] = *cmd;
864
				}
865
				with[len] = '\0';
866
				to = with;
867
			}
868
869
			aptr = _rl_compat_sub(tmp, from, to, g_on);
870
			if (aptr) {
871
				free(tmp);
872
				tmp = aptr;
873
			}
874
			g_on = 0;
875
		}
876
	}
877
	*result = tmp;
878
	return p_on? 2:1;
879
}
880
881
882
/*
883
 * csh-style history expansion
884
 */
885
int
886
history_expand(char *str, char **output)
887
{
888
	int ret = 0;
889
	size_t idx, i, size;
890
	char *tmp, *result;
891
892
	if (h == NULL || e == NULL)
893
		rl_initialize();
894
895
	if (history_expansion_char == 0) {
896
		*output = strdup(str);
897
		return 0;
898
	}
899
900
	*output = NULL;
901
	if (str[0] == history_subst_char) {
902
		/* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
903
		size_t sz = 4 + strlen(str) + 1;
904
		*output = malloc(sz);
905
		if (*output == NULL)
906
			return 0;
907
		(*output)[0] = (*output)[1] = history_expansion_char;
908
		(*output)[2] = ':';
909
		(*output)[3] = 's';
910
		(void)strlcpy((*output) + 4, str, sz - 4);
911
		str = *output;
912
	} else {
913
		*output = strdup(str);
914
		if (*output == NULL)
915
			return 0;
916
	}
917
918
#define ADD_STRING(what, len, fr)					\
919
	{								\
920
		if (idx + len + 1 > size) {				\
921
			char *nresult = realloc(result, (size += len + 1));\
922
			if (nresult == NULL) {				\
923
				free(*output);				\
924
				if (/*CONSTCOND*/fr)			\
925
					free(tmp);			\
926
				return 0;				\
927
			}						\
928
			result = nresult;				\
929
		}							\
930
		(void)strncpy(&result[idx], what, len);			\
931
		idx += len;						\
932
		result[idx] = '\0';					\
933
	}
934
935
	result = NULL;
936
	size = idx = 0;
937
	tmp = NULL;
938
	for (i = 0; str[i];) {
939
		int qchar, loop_again;
940
		size_t len, start, j;
941
942
		qchar = 0;
943
		loop_again = 1;
944
		start = j = i;
945
loop:
946
		for (; str[j]; j++) {
947
			if (str[j] == '\\' &&
948
			    str[j + 1] == history_expansion_char) {
949
				size_t sz = strlen(&str[j]) + 1;
950
				(void)strlcpy(&str[j], &str[j + 1], sz);
951
				continue;
952
			}
953
			if (!loop_again) {
954
				if (isspace((unsigned char) str[j])
955
				    || str[j] == qchar)
956
					break;
957
			}
958
			if (str[j] == history_expansion_char
959
			    && !strchr(history_no_expand_chars, str[j + 1])
960
			    && (!history_inhibit_expansion_function ||
961
			    (*history_inhibit_expansion_function)(str,
962
			    (int)j) == 0))
963
				break;
964
		}
965
966
		if (str[j] && loop_again) {
967
			i = j;
968
			qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
969
			j++;
970
			if (str[j] == history_expansion_char)
971
				j++;
972
			loop_again = 0;
973
			goto loop;
974
		}
975
		len = i - start;
976
		ADD_STRING(&str[start], len, 0);
977
978
		if (str[i] == '\0' || str[i] != history_expansion_char) {
979
			len = j - i;
980
			ADD_STRING(&str[i], len, 0);
981
			if (start == 0)
982
				ret = 0;
983
			else
984
				ret = 1;
985
			break;
986
		}
987
		ret = _history_expand_command (str, i, (j - i), &tmp);
988
		if (ret > 0 && tmp) {
989
			len = strlen(tmp);
990
			ADD_STRING(tmp, len, 1);
991
		}
992
		if (tmp) {
993
			free(tmp);
994
			tmp = NULL;
995
		}
996
		i = j;
997
	}
998
999
	/* ret is 2 for "print only" option */
1000
	if (ret == 2) {
1001
		add_history(result);
1002
#ifdef GDB_411_HACK
1003
		/* gdb 4.11 has been shipped with readline, where */
1004
		/* history_expand() returned -1 when the line	  */
1005
		/* should not be executed; in readline 2.1+	  */
1006
		/* it should return 2 in such a case		  */
1007
		ret = -1;
1008
#endif
1009
	}
1010
	free(*output);
1011
	*output = result;
1012
1013
	return ret;
1014
}
1015
1016
/*
1017
* Return a string consisting of arguments of "str" from "start" to "end".
1018
*/
1019
char *
1020
history_arg_extract(int start, int end, const char *str)
1021
{
1022
	size_t  i, len, max;
1023
	char	**arr, *result = NULL;
1024
1025
	arr = history_tokenize(str);
1026
	if (!arr)
1027
		return NULL;
1028
	if (arr && *arr == NULL)
1029
		goto out;
1030
1031
	for (max = 0; arr[max]; max++)
1032
		continue;
1033
	max--;
1034
1035
	if (start == '$')
1036
		start = (int)max;
1037
	if (end == '$')
1038
		end = (int)max;
1039
	if (end < 0)
1040
		end = (int)max + end + 1;
1041
	if (start < 0)
1042
		start = end;
1043
1044
	if (start < 0 || end < 0 || (size_t)start > max ||
1045
	    (size_t)end > max || start > end)
1046
		goto out;
1047
1048
	for (i = start, len = 0; i <= (size_t)end; i++)
1049
		len += strlen(arr[i]) + 1;
1050
	len++;
1051
	max = len;
1052
	result = malloc(len);
1053
	if (result == NULL)
1054
		goto out;
1055
1056
	for (i = start, len = 0; i <= (size_t)end; i++) {
1057
		(void)strlcpy(result + len, arr[i], max - len);
1058
		len += strlen(arr[i]);
1059
		if (i < (size_t)end)
1060
			result[len++] = ' ';
1061
	}
1062
	result[len] = '\0';
1063
1064
out:
1065
	for (i = 0; arr[i]; i++)
1066
		free(arr[i]);
1067
	free(arr);
1068
1069
	return result;
1070
}
1071
1072
/*
1073
 * Parse the string into individual tokens,
1074
 * similar to how shell would do it.
1075
 */
1076
char **
1077
history_tokenize(const char *str)
1078
{
1079
	int size = 1, idx = 0, i, start;
1080
	size_t len;
1081
	char **result = NULL, *temp, delim = '\0';
1082
1083
	for (i = 0; str[i];) {
1084
		while (isspace((unsigned char) str[i]))
1085
			i++;
1086
		start = i;
1087
		for (; str[i];) {
1088
			if (str[i] == '\\') {
1089
				if (str[i+1] != '\0')
1090
					i++;
1091
			} else if (str[i] == delim)
1092
				delim = '\0';
1093
			else if (!delim &&
1094
				    (isspace((unsigned char) str[i]) ||
1095
				strchr("()<>;&|$", str[i])))
1096
				break;
1097
			else if (!delim && strchr("'`\"", str[i]))
1098
				delim = str[i];
1099
			if (str[i])
1100
				i++;
1101
		}
1102
1103
		if (idx + 2 >= size) {
1104
			char **nresult;
1105
			nresult = reallocarray(result, size,
1106
			    2 * sizeof(char *));
1107
			if (nresult == NULL) {
1108
				free(result);
1109
				return NULL;
1110
			}
1111
			size *= 2;
1112
			result = nresult;
1113
		}
1114
		len = i - start;
1115
		temp = malloc(len + 1);
1116
		if (temp == NULL) {
1117
			for (i = 0; i < idx; i++)
1118
				free(result[i]);
1119
			free(result);
1120
			return NULL;
1121
		}
1122
		(void)strncpy(temp, &str[start], len);
1123
		temp[len] = '\0';
1124
		result[idx++] = temp;
1125
		result[idx] = NULL;
1126
		if (str[i])
1127
			i++;
1128
	}
1129
	return result;
1130
}
1131
1132
1133
/*
1134
 * limit size of history record to ``max'' events
1135
 */
1136
void
1137
stifle_history(int max)
1138
{
1139
12
	HistEvent ev;
1140
	HIST_ENTRY *he;
1141
	int i, len;
1142
1143
6
	if (h == NULL || e == NULL)
1144
		rl_initialize();
1145
1146
6
	len = history_length;
1147
6
	if (history(h, &ev, H_SETSIZE, max) == 0) {
1148
6
		max_input_history = max;
1149
6
		if (max < len)
1150
3
			history_base += len - max;
1151
18
		for (i = 0; i < len - max; i++) {
1152
3
			he = remove_history(0);
1153
3
			free(he->data);
1154
3
			free((void *)he->line);
1155
3
			free(he);
1156
		}
1157
	}
1158
6
}
1159
1160
1161
/*
1162
 * "unlimit" size of history - set the limit to maximum allowed int value
1163
 */
1164
int
1165
unstifle_history(void)
1166
{
1167
96
	HistEvent ev;
1168
	int omax;
1169
1170
48
	history(h, &ev, H_SETSIZE, INT_MAX);
1171
48
	omax = max_input_history;
1172
48
	max_input_history = INT_MAX;
1173
48
	return omax;		/* some value _must_ be returned */
1174
48
}
1175
1176
1177
int
1178
history_is_stifled(void)
1179
{
1180
1181
	/* cannot return true answer */
1182
	return max_input_history != INT_MAX;
1183
}
1184
1185
static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
1186
1187
int
1188
history_truncate_file (const char *filename, int nlines)
1189
{
1190
	int ret = 0;
1191
	FILE *fp, *tp;
1192
	char template[sizeof(_history_tmp_template)];
1193
	char buf[4096];
1194
	int fd;
1195
	char *cp;
1196
	off_t off;
1197
	int count = 0;
1198
	ssize_t left = 0;
1199
1200
	if (filename == NULL && (filename = _default_history_file()) == NULL)
1201
		return errno;
1202
	if ((fp = fopen(filename, "r+")) == NULL)
1203
		return errno;
1204
	strlcpy(template, _history_tmp_template, sizeof(template));
1205
	if ((fd = mkstemp(template)) == -1) {
1206
		ret = errno;
1207
		goto out1;
1208
	}
1209
1210
	if ((tp = fdopen(fd, "r+")) == NULL) {
1211
		close(fd);
1212
		ret = errno;
1213
		goto out2;
1214
	}
1215
1216
	for(;;) {
1217
		if (fread(buf, sizeof(buf), 1, fp) != 1) {
1218
			if (ferror(fp)) {
1219
				ret = errno;
1220
				break;
1221
			}
1222
			if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
1223
			    (off_t)-1) {
1224
				ret = errno;
1225
				break;
1226
			}
1227
			left = fread(buf, 1, sizeof(buf), fp);
1228
			if (ferror(fp)) {
1229
				ret = errno;
1230
				break;
1231
			}
1232
			if (left == 0) {
1233
				count--;
1234
				left = sizeof(buf);
1235
			} else if (fwrite(buf, (size_t)left, 1, tp) != 1) {
1236
				ret = errno;
1237
				break;
1238
			}
1239
			fflush(tp);
1240
			break;
1241
		}
1242
		if (fwrite(buf, sizeof(buf), 1, tp) != 1) {
1243
			ret = errno;
1244
			break;
1245
		}
1246
		count++;
1247
	}
1248
	if (ret)
1249
		goto out3;
1250
	cp = buf + left - 1;
1251
	if(*cp != '\n')
1252
		cp++;
1253
	for(;;) {
1254
		while (--cp >= buf) {
1255
			if (*cp == '\n') {
1256
				if (--nlines == 0) {
1257
					if (++cp >= buf + sizeof(buf)) {
1258
						count++;
1259
						cp = buf;
1260
					}
1261
					break;
1262
				}
1263
			}
1264
		}
1265
		if (nlines <= 0 || count == 0)
1266
			break;
1267
		count--;
1268
		if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
1269
			ret = errno;
1270
			break;
1271
		}
1272
		if (fread(buf, sizeof(buf), 1, tp) != 1) {
1273
			if (ferror(tp)) {
1274
				ret = errno;
1275
				break;
1276
			}
1277
			ret = EAGAIN;
1278
			break;
1279
		}
1280
		cp = buf + sizeof(buf);
1281
	}
1282
1283
	if (ret || nlines > 0)
1284
		goto out3;
1285
1286
	if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) {
1287
		ret = errno;
1288
		goto out3;
1289
	}
1290
1291
	if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
1292
	    (off_t)-1) {
1293
		ret = errno;
1294
		goto out3;
1295
	}
1296
1297
	for(;;) {
1298
		if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) {
1299
			if (ferror(fp))
1300
				ret = errno;
1301
			break;
1302
		}
1303
		if (fwrite(buf, (size_t)left, 1, fp) != 1) {
1304
			ret = errno;
1305
			break;
1306
		}
1307
	}
1308
	fflush(fp);
1309
	if((off = ftello(fp)) > 0)
1310
		(void)ftruncate(fileno(fp), off);
1311
out3:
1312
	fclose(tp);
1313
out2:
1314
	unlink(template);
1315
out1:
1316
	fclose(fp);
1317
1318
	return ret;
1319
}
1320
1321
1322
/*
1323
 * read history from a file given
1324
 */
1325
int
1326
read_history(const char *filename)
1327
{
1328
	HistEvent ev;
1329
1330
	if (h == NULL || e == NULL)
1331
		rl_initialize();
1332
	if (filename == NULL && (filename = _default_history_file()) == NULL)
1333
		return errno;
1334
	return history(h, &ev, H_LOAD, filename) == -1 ?
1335
	    (errno ? errno : EINVAL) : 0;
1336
}
1337
1338
1339
/*
1340
 * write history to a file given
1341
 */
1342
int
1343
write_history(const char *filename)
1344
{
1345
	HistEvent ev;
1346
1347
	if (h == NULL || e == NULL)
1348
		rl_initialize();
1349
	if (filename == NULL && (filename = _default_history_file()) == NULL)
1350
		return errno;
1351
	return history(h, &ev, H_SAVE, filename) == -1 ?
1352
	    (errno ? errno : EINVAL) : 0;
1353
}
1354
1355
1356
/*
1357
 * returns history ``num''th event
1358
 *
1359
 * returned pointer points to static variable
1360
 */
1361
HIST_ENTRY *
1362
history_get(int num)
1363
{
1364
	static HIST_ENTRY she;
1365
18
	HistEvent ev;
1366
	int curr_num;
1367
1368
9
	if (h == NULL || e == NULL)
1369
		rl_initialize();
1370
1371
9
	if (num < history_base)
1372
		return NULL;
1373
1374
	/* save current position */
1375
9
	if (history(h, &ev, H_CURR) != 0)
1376
		return NULL;
1377
9
	curr_num = ev.num;
1378
1379
	/*
1380
	 * use H_DELDATA to set to nth history (without delete) by passing
1381
	 * (void **)-1  -- as in history_set_pos
1382
	 */
1383
9
	if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0)
1384
		goto out;
1385
1386
	/* get current entry */
1387
9
	if (history(h, &ev, H_CURR) != 0)
1388
		goto out;
1389
9
	if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0)
1390
		goto out;
1391
9
	she.line = ev.str;
1392
1393
	/* restore pointer to where it was */
1394
9
	(void)history(h, &ev, H_SET, curr_num);
1395
1396
9
	return &she;
1397
1398
out:
1399
	/* restore pointer to where it was */
1400
	(void)history(h, &ev, H_SET, curr_num);
1401
	return NULL;
1402
9
}
1403
1404
1405
/*
1406
 * add the line to history table
1407
 */
1408
int
1409
add_history(const char *line)
1410
{
1411
144
	HistEvent ev;
1412
1413
72
	if (h == NULL || e == NULL)
1414
		rl_initialize();
1415
1416
72
	(void)history(h, &ev, H_ENTER, line);
1417
72
	if (history(h, &ev, H_GETSIZE) == 0)
1418
72
		history_length = ev.num;
1419
72
	current_history_valid = 1;
1420
1421
144
	return !(history_length > 0); /* return 0 if all is okay */
1422
72
}
1423
1424
1425
/*
1426
 * remove the specified entry from the history list and return it.
1427
 */
1428
HIST_ENTRY *
1429
remove_history(int num)
1430
{
1431
	HIST_ENTRY *he;
1432
18
	HistEvent ev;
1433
1434
9
	if (h == NULL || e == NULL)
1435
		rl_initialize();
1436
1437
9
	if ((he = malloc(sizeof(*he))) == NULL)
1438
		return NULL;
1439
1440
9
	if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1441
		free(he);
1442
		return NULL;
1443
	}
1444
1445
9
	he->line = ev.str;
1446
9
	if (history(h, &ev, H_GETSIZE) == 0)
1447
9
		history_length = ev.num;
1448
1449
9
	return he;
1450
9
}
1451
1452
1453
/*
1454
 * replace the line and data of the num-th entry
1455
 */
1456
HIST_ENTRY *
1457
replace_history_entry(int num, const char *line, histdata_t data)
1458
{
1459
	HIST_ENTRY *he;
1460
	HistEvent ev;
1461
	int curr_num;
1462
1463
	if (h == NULL || e == NULL)
1464
		rl_initialize();
1465
1466
	/* save current position */
1467
	if (history(h, &ev, H_CURR) != 0)
1468
		return NULL;
1469
	curr_num = ev.num;
1470
1471
	/* start from the oldest */
1472
	if (history(h, &ev, H_LAST) != 0)
1473
		return NULL;	/* error */
1474
1475
	if ((he = malloc(sizeof(*he))) == NULL)
1476
		return NULL;
1477
1478
	/* look forwards for event matching specified offset */
1479
	if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1480
		goto out;
1481
1482
	he->line = strdup(ev.str);
1483
	if (he->line == NULL)
1484
		goto out;
1485
1486
	if (history(h, &ev, H_REPLACE, line, data))
1487
		goto out;
1488
1489
	/* restore pointer to where it was */
1490
	if (history(h, &ev, H_SET, curr_num))
1491
		goto out;
1492
1493
	return he;
1494
out:
1495
	free(he);
1496
	return NULL;
1497
}
1498
1499
/*
1500
 * clear the history list - delete all entries
1501
 */
1502
void
1503
clear_history(void)
1504
{
1505
48
	HistEvent ev;
1506
1507
24
	(void)history(h, &ev, H_CLEAR);
1508
24
	history_length = 0;
1509
24
	current_history_valid = 1;
1510
24
}
1511
1512
1513
/*
1514
 * returns offset of the current history event
1515
 */
1516
int
1517
where_history(void)
1518
{
1519
6
	HistEvent ev;
1520
	int curr_num, off;
1521
1522
3
	if (history(h, &ev, H_CURR) != 0)
1523
		return 0;
1524
3
	curr_num = ev.num;
1525
1526
	/* start from the oldest */
1527
3
	(void)history(h, &ev, H_LAST);
1528
1529
	/* position is zero-based */
1530
	off = 0;
1531

21
	while (ev.num != curr_num && history(h, &ev, H_PREV) == 0)
1532
3
		off++;
1533
1534
3
	return off;
1535
3
}
1536
1537
1538
/*
1539
 * returns current history event or NULL if there is no such event
1540
 */
1541
HIST_ENTRY *
1542
current_history(void)
1543
{
1544
1545
57
	return current_history_valid ? _move_history(H_CURR) : NULL;
1546
}
1547
1548
1549
/*
1550
 * returns total number of bytes history events' data are using
1551
 */
1552
int
1553
history_total_bytes(void)
1554
{
1555
	HistEvent ev;
1556
	int curr_num;
1557
	size_t size;
1558
1559
	if (history(h, &ev, H_CURR) != 0)
1560
		return -1;
1561
	curr_num = ev.num;
1562
1563
	(void)history(h, &ev, H_FIRST);
1564
	size = 0;
1565
	do
1566
		size += strlen(ev.str) * sizeof(*ev.str);
1567
	while (history(h, &ev, H_NEXT) == 0);
1568
1569
	/* get to the same position as before */
1570
	history(h, &ev, H_PREV_EVENT, curr_num);
1571
1572
	return (int)size;
1573
}
1574
1575
1576
/*
1577
 * sets the position in the history list to ``pos''
1578
 */
1579
int
1580
history_set_pos(int pos)
1581
{
1582
36
	HistEvent ev;
1583
	int curr_num;
1584
1585
18
	if (pos >= history_length || pos < 0)
1586
3
		return 0;
1587
1588
15
	(void)history(h, &ev, H_CURR);
1589
15
	curr_num = ev.num;
1590
15
	current_history_valid = 1;
1591
1592
	/*
1593
	 * use H_DELDATA to set to nth history (without delete) by passing
1594
	 * (void **)-1
1595
	 */
1596
15
	if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
1597
		(void)history(h, &ev, H_SET, curr_num);
1598
		return 0;
1599
	}
1600
15
	return 1;
1601
18
}
1602
1603
1604
/*
1605
 * returns previous event in history and shifts pointer accordingly
1606
 * Note that readline and editline define directions in opposite ways.
1607
 */
1608
HIST_ENTRY *
1609
previous_history(void)
1610
{
1611
1612
12
	if (current_history_valid == 0) {
1613
		current_history_valid = 1;
1614
		return _move_history(H_CURR);
1615
	}
1616
6
	return _move_history(H_NEXT);
1617
6
}
1618
1619
1620
/*
1621
 * returns next event in history and shifts pointer accordingly
1622
 */
1623
HIST_ENTRY *
1624
next_history(void)
1625
{
1626
	HIST_ENTRY *he;
1627
1628
12
	he = _move_history(H_PREV);
1629
6
	if (he == NULL)
1630
3
		current_history_valid = 0;
1631
6
	return he;
1632
}
1633
1634
1635
/*
1636
 * searches for first history event containing the str
1637
 */
1638
int
1639
history_search(const char *str, int direction)
1640
{
1641
	HistEvent ev;
1642
	const char *strp;
1643
	int curr_num;
1644
1645
	if (history(h, &ev, H_CURR) != 0)
1646
		return -1;
1647
	curr_num = ev.num;
1648
1649
	for (;;) {
1650
		if ((strp = strstr(ev.str, str)) != NULL)
1651
			return (int)(strp - ev.str);
1652
		if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1653
			break;
1654
	}
1655
	(void)history(h, &ev, H_SET, curr_num);
1656
	return -1;
1657
}
1658
1659
1660
/*
1661
 * searches for first history event beginning with str
1662
 */
1663
int
1664
history_search_prefix(const char *str, int direction)
1665
{
1666
	HistEvent ev;
1667
1668
	return (history(h, &ev, direction < 0 ?
1669
	    H_PREV_STR : H_NEXT_STR, str));
1670
}
1671
1672
1673
/*
1674
 * search for event in history containing str, starting at offset
1675
 * abs(pos); continue backward, if pos<0, forward otherwise
1676
 */
1677
/* ARGSUSED */
1678
int
1679
history_search_pos(const char *str,
1680
		   int direction __attribute__((__unused__)), int pos)
1681
{
1682
	HistEvent ev;
1683
	int curr_num, off;
1684
1685
	off = (pos > 0) ? pos : -pos;
1686
	pos = (pos > 0) ? 1 : -1;
1687
1688
	if (history(h, &ev, H_CURR) != 0)
1689
		return -1;
1690
	curr_num = ev.num;
1691
1692
	if (!history_set_pos(off) || history(h, &ev, H_CURR) != 0)
1693
		return -1;
1694
1695
	for (;;) {
1696
		if (strstr(ev.str, str))
1697
			return off;
1698
		if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1699
			break;
1700
	}
1701
1702
	/* set "current" pointer back to previous state */
1703
	(void)history(h, &ev,
1704
	    pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1705
1706
	return -1;
1707
}
1708
1709
1710
/********************************/
1711
/* completion functions */
1712
1713
char *
1714
tilde_expand(char *name)
1715
{
1716
	return fn_tilde_expand(name);
1717
}
1718
1719
char *
1720
filename_completion_function(const char *name, int state)
1721
{
1722
	return fn_filename_completion_function(name, state);
1723
}
1724
1725
/*
1726
 * a completion generator for usernames; returns _first_ username
1727
 * which starts with supplied text
1728
 * text contains a partial username preceded by random character
1729
 * (usually '~'); state is ignored
1730
 * it's the caller's responsibility to free the returned value
1731
 */
1732
char *
1733
username_completion_function(const char *text, int state)
1734
{
1735
	struct passwd *pwd;
1736
1737
	if (text[0] == '\0')
1738
		return NULL;
1739
1740
	if (*text == '~')
1741
		text++;
1742
1743
	if (state == 0)
1744
		setpwent();
1745
1746
	while ((pwd = getpwent()) != NULL && text[0] == pwd->pw_name[0]
1747
	    && strcmp(text, pwd->pw_name) == 0);
1748
1749
	if (pwd == NULL) {
1750
		endpwent();
1751
		return NULL;
1752
	}
1753
	return strdup(pwd->pw_name);
1754
}
1755
1756
1757
/*
1758
 * el-compatible wrapper to send TSTP on ^Z
1759
 */
1760
/* ARGSUSED */
1761
static unsigned char
1762
_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
1763
{
1764
	(void)kill(0, SIGTSTP);
1765
	return CC_NORM;
1766
}
1767
1768
/*
1769
 * Display list of strings in columnar format on readline's output stream.
1770
 * 'matches' is list of strings, 'len' is number of strings in 'matches',
1771
 * 'max' is maximum length of string in 'matches'.
1772
 */
1773
void
1774
rl_display_match_list(char **matches, int len, int max)
1775
{
1776
1777
	fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1778
}
1779
1780
static const char *
1781
/*ARGSUSED*/
1782
_rl_completion_append_character_function(const char *dummy
1783
    __attribute__((__unused__)))
1784
{
1785
	static char buf[2];
1786
	buf[0] = rl_completion_append_character;
1787
	buf[1] = '\0';
1788
	return buf;
1789
}
1790
1791
1792
/*
1793
 * complete word at current point
1794
 */
1795
/* ARGSUSED */
1796
int
1797
rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1798
{
1799
	static ct_buffer_t wbreak_conv, sprefix_conv;
1800
1801
	if (h == NULL || e == NULL)
1802
		rl_initialize();
1803
1804
	if (rl_inhibit_completion) {
1805
		char arr[2];
1806
		arr[0] = (char)invoking_key;
1807
		arr[1] = '\0';
1808
		el_insertstr(e, arr);
1809
		return CC_REFRESH;
1810
	}
1811
1812
	/* Just look at how many global variables modify this operation! */
1813
	return fn_complete(e,
1814
	    (CPFunction *)rl_completion_entry_function,
1815
	    rl_attempted_completion_function,
1816
	    ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1817
	    ct_decode_string(rl_special_prefixes, &sprefix_conv),
1818
	    _rl_completion_append_character_function,
1819
	    (size_t)rl_completion_query_items,
1820
	    &rl_completion_type, &rl_attempted_completion_over,
1821
	    &rl_point, &rl_end);
1822
1823
1824
}
1825
1826
1827
/* ARGSUSED */
1828
static unsigned char
1829
_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
1830
{
1831
	return (unsigned char)rl_complete(0, ch);
1832
}
1833
1834
/*
1835
 * misc other functions
1836
 */
1837
1838
/*
1839
 * bind key c to readline-type function func
1840
 */
1841
int
1842
rl_bind_key(int c, rl_command_func_t *func)
1843
{
1844
	int retval = -1;
1845
1846
	if (h == NULL || e == NULL)
1847
		rl_initialize();
1848
1849
	if (func == rl_insert) {
1850
		/* XXX notice there is no range checking of ``c'' */
1851
		e->el_map.key[c] = ED_INSERT;
1852
		retval = 0;
1853
	}
1854
	return retval;
1855
}
1856
1857
1858
/*
1859
 * read one key from input - handles chars pushed back
1860
 * to input stream also
1861
 */
1862
int
1863
rl_read_key(void)
1864
{
1865
	char fooarr[2 * sizeof(int)];
1866
1867
	if (e == NULL || h == NULL)
1868
		rl_initialize();
1869
1870
	return el_getc(e, fooarr);
1871
}
1872
1873
1874
/*
1875
 * reset the terminal
1876
 */
1877
/* ARGSUSED */
1878
void
1879
rl_reset_terminal(const char *p __attribute__((__unused__)))
1880
{
1881
1882
	if (h == NULL || e == NULL)
1883
		rl_initialize();
1884
	el_reset(e);
1885
}
1886
1887
1888
/*
1889
 * insert character ``c'' back into input stream, ``count'' times
1890
 */
1891
int
1892
rl_insert(int count, int c)
1893
{
1894
	char arr[2];
1895
1896
	if (h == NULL || e == NULL)
1897
		rl_initialize();
1898
1899
	/* XXX - int -> char conversion can lose on multichars */
1900
	arr[0] = c;
1901
	arr[1] = '\0';
1902
1903
	for (; count > 0; count--)
1904
		el_push(e, arr);
1905
1906
	return 0;
1907
}
1908
1909
int
1910
rl_insert_text(const char *text)
1911
{
1912
	if (!text || *text == 0)
1913
		return 0;
1914
1915
	if (h == NULL || e == NULL)
1916
		rl_initialize();
1917
1918
	if (el_insertstr(e, text) < 0)
1919
		return 0;
1920
	return (int)strlen(text);
1921
}
1922
1923
/*ARGSUSED*/
1924
int
1925
rl_newline(int count, int c)
1926
{
1927
	/*
1928
	 * Readline-4.0 appears to ignore the args.
1929
	 */
1930
	return rl_insert(1, '\n');
1931
}
1932
1933
/*ARGSUSED*/
1934
static unsigned char
1935
rl_bind_wrapper(EditLine *el, unsigned char c)
1936
{
1937
	if (map[c] == NULL)
1938
	    return CC_ERROR;
1939
1940
	_rl_update_pos();
1941
1942
	(*map[c])(NULL, c);
1943
1944
	/* If rl_done was set by the above call, deal with it here */
1945
	if (rl_done)
1946
		return CC_EOF;
1947
1948
	return CC_NORM;
1949
}
1950
1951
int
1952
rl_add_defun(const char *name, Function *fun, int c)
1953
{
1954
	char dest[8];
1955
	if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1956
		return -1;
1957
	map[(unsigned char)c] = fun;
1958
	el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1959
	vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1960
	el_set(e, EL_BIND, dest, name, NULL);
1961
	return 0;
1962
}
1963
1964
void
1965
rl_callback_read_char()
1966
{
1967
	int count = 0, done = 0;
1968
	const char *buf = el_gets(e, &count);
1969
	char *wbuf;
1970
1971
	if (buf == NULL || count-- <= 0)
1972
		return;
1973
	if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1974
		done = 1;
1975
	if (buf[count] == '\n' || buf[count] == '\r')
1976
		done = 2;
1977
1978
	if (done && rl_linefunc != NULL) {
1979
		el_set(e, EL_UNBUFFERED, 0);
1980
		if (done == 2) {
1981
		    if ((wbuf = strdup(buf)) != NULL)
1982
			wbuf[count] = '\0';
1983
		} else
1984
			wbuf = NULL;
1985
		(*(void (*)(const char *))rl_linefunc)(wbuf);
1986
		//el_set(e, EL_UNBUFFERED, 1);
1987
	}
1988
}
1989
1990
void
1991
rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1992
{
1993
	if (e == NULL) {
1994
		rl_initialize();
1995
	}
1996
	(void)rl_set_prompt(prompt);
1997
	rl_linefunc = linefunc;
1998
	el_set(e, EL_UNBUFFERED, 1);
1999
}
2000
2001
void
2002
rl_callback_handler_remove(void)
2003
{
2004
	el_set(e, EL_UNBUFFERED, 0);
2005
	rl_linefunc = NULL;
2006
}
2007
2008
void
2009
rl_redisplay(void)
2010
{
2011
	char a[2];
2012
	a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
2013
	a[1] = '\0';
2014
	el_push(e, a);
2015
}
2016
2017
int
2018
rl_get_previous_history(int count, int key)
2019
{
2020
	char a[2];
2021
	a[0] = key;
2022
	a[1] = '\0';
2023
	while (count--)
2024
		el_push(e, a);
2025
	return 0;
2026
}
2027
2028
void
2029
/*ARGSUSED*/
2030
rl_prep_terminal(int meta_flag)
2031
{
2032
	el_set(e, EL_PREP_TERM, 1);
2033
}
2034
2035
void
2036
rl_deprep_terminal(void)
2037
{
2038
	el_set(e, EL_PREP_TERM, 0);
2039
}
2040
2041
int
2042
rl_read_init_file(const char *s)
2043
{
2044
	return el_source(e, s);
2045
}
2046
2047
int
2048
rl_parse_and_bind(const char *line)
2049
{
2050
	const char **argv;
2051
	int argc;
2052
	Tokenizer *tok;
2053
2054
	tok = tok_init(NULL);
2055
	tok_str(tok, line, &argc, &argv);
2056
	argc = el_parse(e, argc, argv);
2057
	tok_end(tok);
2058
	return argc ? 1 : 0;
2059
}
2060
2061
int
2062
rl_variable_bind(const char *var, const char *value)
2063
{
2064
	/*
2065
	 * The proper return value is undocument, but this is what the
2066
	 * readline source seems to do.
2067
	 */
2068
	return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
2069
}
2070
2071
void
2072
rl_stuff_char(int c)
2073
{
2074
	char buf[2];
2075
2076
	buf[0] = c;
2077
	buf[1] = '\0';
2078
	el_insertstr(e, buf);
2079
}
2080
2081
static int
2082
_rl_event_read_char(EditLine *el, wchar_t *wc)
2083
{
2084
	char	ch;
2085
	int	n;
2086
	ssize_t num_read = 0;
2087
2088
	ch = '\0';
2089
	*wc = L'\0';
2090
	while (rl_event_hook) {
2091
2092
		(*rl_event_hook)();
2093
2094
#if defined(FIONREAD)
2095
		if (ioctl(el->el_infd, FIONREAD, &n) < 0)
2096
			return -1;
2097
		if (n)
2098
			num_read = read(el->el_infd, &ch, 1);
2099
		else
2100
			num_read = 0;
2101
#elif defined(F_SETFL) && defined(O_NDELAY)
2102
		if ((n = fcntl(el->el_infd, F_GETFL)) < 0)
2103
			return -1;
2104
		if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
2105
			return -1;
2106
		num_read = read(el->el_infd, &ch, 1);
2107
		if (fcntl(el->el_infd, F_SETFL, n))
2108
			return -1;
2109
#else
2110
		/* not non-blocking, but what you gonna do? */
2111
		num_read = read(el->el_infd, &ch, 1);
2112
		return -1;
2113
#endif
2114
2115
		if (num_read < 0 && errno == EAGAIN)
2116
			continue;
2117
		if (num_read == 0)
2118
			continue;
2119
		break;
2120
	}
2121
	if (!rl_event_hook)
2122
		el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
2123
	*wc = (wchar_t)ch;
2124
	return (int)num_read;
2125
}
2126
2127
static void
2128
_rl_update_pos(void)
2129
{
2130
6
	const LineInfo *li = el_line(e);
2131
2132
3
	rl_point = (int)(li->cursor - li->buffer);
2133
3
	rl_end = (int)(li->lastchar - li->buffer);
2134
3
}
2135
2136
void
2137
rl_get_screen_size(int *rows, int *cols)
2138
{
2139
	if (rows)
2140
		el_get(e, EL_GETTC, "li", rows);
2141
	if (cols)
2142
		el_get(e, EL_GETTC, "co", cols);
2143
}
2144
2145
void
2146
rl_set_screen_size(int rows, int cols)
2147
{
2148
	char buf[64];
2149
	(void)snprintf(buf, sizeof(buf), "%d", rows);
2150
	el_set(e, EL_SETTC, "li", buf, NULL);
2151
	(void)snprintf(buf, sizeof(buf), "%d", cols);
2152
	el_set(e, EL_SETTC, "co", buf, NULL);
2153
}
2154
2155
char **
2156
rl_completion_matches(const char *str, rl_compentry_func_t *fun)
2157
{
2158
	size_t len, max, i, j, min;
2159
	char **list, *match, *a, *b;
2160
2161
	len = 1;
2162
	max = 10;
2163
	if ((list = reallocarray(NULL, max, sizeof(*list))) == NULL)
2164
		return NULL;
2165
2166
	while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
2167
		list[len++] = match;
2168
		if (len == max) {
2169
			char **nl;
2170
			max += 10;
2171
			if ((nl = reallocarray(list, max, sizeof(*nl))) == NULL)
2172
				goto out;
2173
			list = nl;
2174
		}
2175
	}
2176
	if (len == 1)
2177
		goto out;
2178
	list[len] = NULL;
2179
	if (len == 2) {
2180
		if ((list[0] = strdup(list[1])) == NULL)
2181
			goto out;
2182
		return list;
2183
	}
2184
	qsort(&list[1], len - 1, sizeof(*list),
2185
	    (int (*)(const void *, const void *)) strcmp);
2186
	min = SIZE_MAX;
2187
	for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
2188
		b = list[i + 1];
2189
		for (j = 0; a[j] && a[j] == b[j]; j++)
2190
			continue;
2191
		if (min > j)
2192
			min = j;
2193
	}
2194
	if (min == 0 && *str) {
2195
		if ((list[0] = strdup(str)) == NULL)
2196
			goto out;
2197
	} else {
2198
		if ((list[0] = malloc(min + 1)) == NULL)
2199
			goto out;
2200
		(void)memcpy(list[0], list[1], min);
2201
		list[0][min] = '\0';
2202
	}
2203
	return list;
2204
2205
out:
2206
	free(list);
2207
	return NULL;
2208
}
2209
2210
char *
2211
rl_filename_completion_function (const char *text, int state)
2212
{
2213
	return fn_filename_completion_function(text, state);
2214
}
2215
2216
void
2217
rl_forced_update_display(void)
2218
{
2219
	el_set(e, EL_REFRESH);
2220
}
2221
2222
int
2223
_rl_abort_internal(void)
2224
{
2225
	el_beep(e);
2226
	longjmp(topbuf, 1);
2227
	/*NOTREACHED*/
2228
}
2229
2230
int
2231
_rl_qsort_string_compare(char **s1, char **s2)
2232
{
2233
	return strcoll(*s1, *s2);
2234
}
2235
2236
HISTORY_STATE *
2237
history_get_history_state(void)
2238
{
2239
	HISTORY_STATE *hs;
2240
2241
	if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL)
2242
		return NULL;
2243
	hs->length = history_length;
2244
	return hs;
2245
}
2246
2247
int
2248
/*ARGSUSED*/
2249
rl_kill_text(int from, int to)
2250
{
2251
	return 0;
2252
}
2253
2254
Keymap
2255
rl_make_bare_keymap(void)
2256
{
2257
	return NULL;
2258
}
2259
2260
Keymap
2261
rl_get_keymap(void)
2262
{
2263
	return NULL;
2264
}
2265
2266
void
2267
/*ARGSUSED*/
2268
rl_set_keymap(Keymap k)
2269
{
2270
}
2271
2272
int
2273
/*ARGSUSED*/
2274
rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
2275
{
2276
	return 0;
2277
}
2278
2279
int
2280
/*ARGSUSED*/
2281
rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k)
2282
{
2283
	return 0;
2284
}
2285
2286
/* unsupported, but needed by python */
2287
void
2288
rl_cleanup_after_signal(void)
2289
{
2290
}
2291
2292
int
2293
rl_on_new_line(void)
2294
{
2295
	return 0;
2296
}
2297
2298
int
2299
/*ARGSUSED*/
2300
rl_set_keyboard_input_timeout(int u __attribute__((__unused__)))
2301
{
2302
	return 0;
2303
}