Source

asterisk / cli.c

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Standard Command Line Interface
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */

#include <unistd.h>
#include <stdlib.h>
#include <asterisk/logger.h>
#include <asterisk/options.h>
#include <asterisk/cli.h>
#include <asterisk/module.h>
#include <asterisk/channel.h>
#include <asterisk/channel_pvt.h>
#include <sys/signal.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <pthread.h>
/* For rl_filename_completion */
#include "editline/readline/readline.h"
/* For module directory */
#include "asterisk.h"
#include "build.h"
#include "astconf.h"

#define VERSION_INFO "Asterisk " ASTERISK_VERSION " built by " BUILD_USER "@" BUILD_HOSTNAME \
	" on a " BUILD_MACHINE " running " BUILD_OS
	
void ast_cli(int fd, char *fmt, ...)
{
	char stuff[4096];
	va_list ap;
	va_start(ap, fmt);
	vsnprintf(stuff, sizeof(stuff), fmt, ap);
	va_end(ap);
	write(fd, stuff, strlen(stuff));
}

pthread_mutex_t clilock = AST_MUTEX_INITIALIZER;


struct ast_cli_entry *helpers = NULL;

static char load_help[] = 
"Usage: load <module name>\n"
"       Loads the specified module into Asterisk.\n";

static char unload_help[] = 
"Usage: unload [-f|-h] <module name>\n"
"       Unloads the specified module from Asterisk.  The -f\n"
"       option causes the module to be unloaded even if it is\n"
"       in use (may cause a crash) and the -h module causes the\n"
"       module to be unloaded even if the module says it cannot, \n"
"       which almost always will cause a crash.\n";

static char help_help[] =
"Usage: help [topic]\n"
"       When called with a topic as an argument, displays usage\n"
"       information on the given command.  If called without a\n"
"       topic, it provides a list of commands.\n";

static char chanlist_help[] = 
"Usage: show channels\n"
"       Lists currently defined channels and some information about\n"
"       them.\n";

static char reload_help[] = 
"Usage: reload\n"
"       Reloads configuration files for all modules which support\n"
"       reloading.\n";

static char set_verbose_help[] = 
"Usage: set verbose <level>\n"
"       Sets level of verbose messages to be displayed.  0 means\n"
"       no messages should be displayed.\n";

static char softhangup_help[] =
"Usage: soft hangup <channel>\n"
"       Request that a channel be hung up.  The hangup takes effect\n"
"       the next time the driver reads or writes from the channel\n";

static int handle_load(int fd, int argc, char *argv[])
{
	if (argc != 2)
		return RESULT_SHOWUSAGE;
	if (ast_load_resource(argv[1])) {
		ast_cli(fd, "Unable to load module %s\n", argv[1]);
		return RESULT_FAILURE;
	}
	return RESULT_SUCCESS;
}

static int handle_reload(int fd, int argc, char *argv[])
{
	if (argc != 1)
		return RESULT_SHOWUSAGE;
	ast_module_reload();
	return RESULT_SUCCESS;
}

static int handle_set_verbose(int fd, int argc, char *argv[])
{
	int val;
	/* Has a hidden 'at least' argument */
	if ((argc != 3) && (argc != 4))
		return RESULT_SHOWUSAGE;
	if ((argc == 4) && strcasecmp(argv[2], "atleast"))
		return RESULT_SHOWUSAGE;
	if (argc == 3)
		option_verbose = atoi(argv[2]);
	else {
		val = atoi(argv[3]);
		if (val > option_verbose)
			option_verbose = val;
	}
	return RESULT_SUCCESS;
}

static int handle_unload(int fd, int argc, char *argv[])
{
	int x;
	int force=AST_FORCE_SOFT;
	if (argc < 2)
		return RESULT_SHOWUSAGE;
	for (x=1;x<argc;x++) {
		if (argv[x][0] == '-') {
			switch(argv[x][1]) {
			case 'f':
				force = AST_FORCE_FIRM;
				break;
			case 'h':
				force = AST_FORCE_HARD;
				break;
			default:
				return RESULT_SHOWUSAGE;
			}
		} else if (x !=  argc - 1) 
			return RESULT_SHOWUSAGE;
		else if (ast_unload_resource(argv[x], force)) {
			ast_cli(fd, "Unable to unload resource %s\n", argv[x]);
			return RESULT_FAILURE;
		}
	}
	return RESULT_SUCCESS;
}

#define MODLIST_FORMAT  "%-20s %-40.40s %-10d\n"
#define MODLIST_FORMAT2 "%-20s %-40.40s %-10s\n"

static pthread_mutex_t climodentrylock = AST_MUTEX_INITIALIZER;
static int climodentryfd = -1;

static int modlist_modentry(char *module, char *description, int usecnt)
{
	ast_cli(climodentryfd, MODLIST_FORMAT, module, description, usecnt);
	return 0;
}

static char modlist_help[] =
"Usage: show modules\n"
"       Shows Asterisk modules currently in use, and usage "
"statistics.\n";

static char version_help[] =
"Usage: show version\n"
"       Shows Asterisk version information.\n ";

static int handle_modlist(int fd, int argc, char *argv[])
{
	if (argc != 2)
		return RESULT_SHOWUSAGE;
	ast_pthread_mutex_lock(&climodentrylock);
	climodentryfd = fd;
	ast_cli(fd, MODLIST_FORMAT2, "Module", "Description", "Use Count");
	ast_update_module_list(modlist_modentry);
	climodentryfd = -1;
	ast_pthread_mutex_unlock(&climodentrylock);
	return RESULT_SUCCESS;
}

static int handle_version(int fd, int argc, char *argv[])
{
	if (argc != 2)
		return RESULT_SHOWUSAGE;
	ast_cli(fd, "%s\n", VERSION_INFO);
	return RESULT_SUCCESS;
}
static int handle_chanlist(int fd, int argc, char *argv[])
{
#define FORMAT_STRING  "%15s  (%-10s %-12s %-4d) %7s %-12s  %-15s\n"
#define FORMAT_STRING2 "%15s  (%-10s %-12s %-4s) %7s %-12s  %-15s\n"
	struct ast_channel *c=NULL;
	if (argc != 2)
		return RESULT_SHOWUSAGE;
	c = ast_channel_walk(NULL);
	ast_cli(fd, FORMAT_STRING2, "Channel", "Context", "Extension", "Pri", "State", "Appl.", "Data");
	while(c) {
		ast_cli(fd, FORMAT_STRING, c->name, c->context, c->exten, c->priority, ast_state2str(c->_state),
		c->appl ? c->appl : "(None)", c->data ? ( strlen(c->data) ? c->data : "(Empty)" ): "(None)");
		c = ast_channel_walk(c);
	}
	return RESULT_SUCCESS;
}

static char showchan_help[] = 
"Usage: show channel <channel>\n"
"       Shows lots of information about the specified channel.\n";

static char commandcomplete_help[] = 
"Usage: _command complete \"<line>\" text state\n"
"       This function is used internally to help with command completion and should.\n"
"       never be called by the user directly.\n";

static char commandnummatches_help[] = 
"Usage: _command nummatches \"<line>\" text \n"
"       This function is used internally to help with command completion and should.\n"
"       never be called by the user directly.\n";

static char commandmatchesarray_help[] = 
"Usage: _command matchesarray \"<line>\" text \n"
"       This function is used internally to help with command completion and should.\n"
"       never be called by the user directly.\n";

static int handle_softhangup(int fd, int argc, char *argv[])
{
	struct ast_channel *c=NULL;
	if (argc != 3)
		return RESULT_SHOWUSAGE;
	c = ast_channel_walk(NULL);
	while(c) {
		if (!strcasecmp(c->name, argv[2])) {
			ast_cli(fd, "Requested Hangup on channel '%s'\n", c->name);
			ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
			break;
		}
		c = ast_channel_walk(c);
	}
	if (!c) 
		ast_cli(fd, "%s is not a known channel\n", argv[2]);
	return RESULT_SUCCESS;
}

static char *__ast_cli_generator(char *text, char *word, int state, int lock);

static int handle_commandmatchesarray(int fd, int argc, char *argv[])
{
	char buf[2048];
	int len = 0;
	char **matches;
	int x;

	if (argc != 4)
		return RESULT_SHOWUSAGE;
	buf[len] = '\0';
	matches = ast_cli_completion_matches(argv[2], argv[3]);
	if (matches) {
		for (x=0; matches[x]; x++) {
#if 0
			printf("command matchesarray for '%s' %s got '%s'\n", argv[2], argv[3], matches[x]);
#endif
			len += sprintf( buf + len, "%s ", matches[x]);
		}
	}
#if 0
	printf("array for '%s' %s got '%s'\n", argv[2], argv[3], buf);
#endif
	
	if (buf) {
		ast_cli(fd, buf);
	} else
		ast_cli(fd, "NULL\n");

	return RESULT_SUCCESS;
}



static int handle_commandnummatches(int fd, int argc, char *argv[])
{
	int matches = 0;

	if (argc != 4)
		return RESULT_SHOWUSAGE;

	matches = ast_cli_generatornummatches(argv[2], argv[3]);

#if 0
	printf("Search for '%s' %s got '%d'\n", argv[2], argv[3], matches);
#endif
	ast_cli(fd, "%d", matches);

	return RESULT_SUCCESS;
}

static int handle_commandcomplete(int fd, int argc, char *argv[])
{
	char *buf;
#if 0
	printf("Search for %d args: '%s', '%s', '%s', '%s'\n", argc, argv[0], argv[1], argv[2], argv[3]);
#endif	
	if (argc != 5)
		return RESULT_SHOWUSAGE;
	buf = __ast_cli_generator(argv[2], argv[3], atoi(argv[4]), 0);
#if 0
	printf("Search for '%s' %s %d got '%s'\n", argv[2], argv[3], atoi(argv[4]), buf);
#endif	
	if (buf) {
		ast_cli(fd, buf);
		free(buf);
	} else
		ast_cli(fd, "NULL\n");
	return RESULT_SUCCESS;
}

static int handle_showchan(int fd, int argc, char *argv[])
{
	struct ast_channel *c=NULL;
	if (argc != 3)
		return RESULT_SHOWUSAGE;
	c = ast_channel_walk(NULL);
	while(c) {
		if (!strcasecmp(c->name, argv[2])) {
			ast_cli(fd, 
	" -- General --\n"
	"           Name: %s\n"
	"           Type: %s\n"
	"      Caller ID: %s\n"
	"    DNID Digits: %s\n"
	"          State: %s (%d)\n"
	"          Rings: %d\n"
	"   NativeFormat: %d\n"
	"    WriteFormat: %d\n"
	"     ReadFormat: %d\n"
	"1st File Descriptor: %d\n"
	"      Frames in: %d\n"
	"     Frames out: %d\n"
	" --   PBX   --\n"
	"        Context: %s\n"
	"      Extension: %s\n"
	"       Priority: %d\n"
	"    Application: %s\n"
	"           Data: %s\n"
	"          Stack: %d\n"
	"    Blocking in: %s\n",
	c->name, c->type, 
	(c->callerid ? c->callerid : "(N/A)"),
	(c->dnid ? c->dnid : "(N/A)" ), ast_state2str(c->_state), c->_state, c->rings, c->nativeformats, c->writeformat, c->readformat,
	c->fds[0], c->fin, c->fout, c->context, c->exten, c->priority, ( c->appl ? c->appl : "(N/A)" ),
	( c-> data ? (strlen(c->data) ? c->data : "(Empty)") : "(None)"),
	c->stack, (c->blocking ? c->blockproc : "(Not Blocking)"));
	
		break;
		}
		c = ast_channel_walk(c);
	}
	if (!c) 
		ast_cli(fd, "%s is not a known channel\n", argv[2]);
	return RESULT_SUCCESS;
}

static char *complete_ch(char *line, char *word, int pos, int state)
{
	struct ast_channel *c;
	int which=0;
	c = ast_channel_walk(NULL);
	while(c) {
		if (!strncasecmp(word, c->name, strlen(word))) {
			if (++which > state)
				break;
		}
		c = ast_channel_walk(c);
	}
	return c ? strdup(c->name) : NULL;
}

static char *complete_fn(char *line, char *word, int pos, int state)
{
	char *c;
	char filename[256];
	if (pos != 1)
		return NULL;
	if (word[0] == '/')
		strncpy(filename, word, sizeof(filename)-1);
	else
		snprintf(filename, sizeof(filename), "%s/%s", (char *)ast_config_AST_MODULE_DIR, word);
	c = (char*)filename_completion_function(filename, state);
	if (c && word[0] != '/')
		c += (strlen((char*)ast_config_AST_MODULE_DIR) + 1);
	return c ? strdup(c) : c;
}

static int handle_help(int fd, int argc, char *argv[]);

static struct ast_cli_entry builtins[] = {
	/* Keep alphabetized */
	{ { "help", NULL }, handle_help, "Display help list, or specific help on a command", help_help },
	{ { "_command", "complete", NULL }, handle_commandcomplete, "Command complete", commandcomplete_help },
	{ { "_command", "nummatches", NULL }, handle_commandnummatches, "Returns number of command matches", commandnummatches_help },
	{ { "_command", "matchesarray", NULL }, handle_commandmatchesarray, "Returns command matches array", commandmatchesarray_help },
	{ { "load", NULL }, handle_load, "Load a dynamic module by name", load_help, complete_fn },
	{ { "reload", NULL }, handle_reload, "Reload configuration", reload_help },
	{ { "set", "verbose", NULL }, handle_set_verbose, "Set level of verboseness", set_verbose_help },
	{ { "show", "channel", NULL }, handle_showchan, "Display information on a specific channel", showchan_help, complete_ch },
	{ { "show", "channels", NULL }, handle_chanlist, "Display information on channels", chanlist_help },
	{ { "show", "modules", NULL }, handle_modlist, "List modules and info", modlist_help },
	{ { "show", "version", NULL }, handle_version, "Display version info", version_help },
	{ { "soft", "hangup", NULL }, handle_softhangup, "Request a hangup on a given channel", softhangup_help, complete_ch },
	{ { "unload", NULL }, handle_unload, "Unload a dynamic module by name", unload_help, complete_fn },
	{ { NULL }, NULL, NULL, NULL }
};

static struct ast_cli_entry *find_cli(char *cmds[], int exact)
{
	int x;
	int y;
	int match;
	struct ast_cli_entry *e=NULL;
	for (x=0;builtins[x].cmda[0];x++) {
		/* start optimistic */
		match = 1;
		for (y=0;match && cmds[y]; y++) {
			/* If there are no more words in the candidate command, then we're
			   there.  */
			if (!builtins[x].cmda[y] && !exact)
				break;
			/* If there are no more words in the command (and we're looking for
			   an exact match) or there is a difference between the two words,
			   then this is not a match */
			if (!builtins[x].cmda[y] || strcasecmp(builtins[x].cmda[y], cmds[y]))
				match = 0;
		}
		/* If more words are needed to complete the command then this is not
		   a candidate (unless we're looking for a really inexact answer  */
		if ((exact > -1) && builtins[x].cmda[y])
			match = 0;
		if (match)
			return &builtins[x];
	}
	for (e=helpers;e;e=e->next) {
		match = 1;
		for (y=0;match && cmds[y]; y++) {
			if (!e->cmda[y] && !exact)
				break;
			if (!e->cmda[y] || strcasecmp(e->cmda[y], cmds[y]))
				match = 0;
		}
		if ((exact > -1) && e->cmda[y])
			match = 0;
		if (match)
			break;
	}
	return e;
}

static void join(char *s, int len, char *w[])
{
	int x;
	/* Join words into a string */
	strcpy(s, "");
	for (x=0;w[x];x++) {
		if (x)
			strncat(s, " ", len - strlen(s));
		strncat(s, w[x], len - strlen(s));
	}
}

static void join2(char *s, int len, char *w[])
{
	int x;
	/* Join words into a string */
	strcpy(s, "");
	for (x=0;w[x];x++) {
		strncat(s, w[x], len - strlen(s));
	}
}

static char *find_best(char *argv[])
{
	static char cmdline[80];
	int x;
	/* See how close we get, then print the  */
	char *myargv[AST_MAX_CMD_LEN];
	for (x=0;x<AST_MAX_CMD_LEN;x++)
		myargv[x]=NULL;
	for (x=0;argv[x];x++) {
		myargv[x] = argv[x];
		if (!find_cli(myargv, -1))
			break;
	}
	join(cmdline, sizeof(cmdline), myargv);
	return cmdline;
}

int ast_cli_unregister(struct ast_cli_entry *e)
{
	struct ast_cli_entry *cur, *l=NULL;
	ast_pthread_mutex_lock(&clilock);
	cur = helpers;
	while(cur) {
		if (e == cur) {
			if (e->inuse) {
				ast_log(LOG_WARNING, "Can't remove command that is in use\n");
			} else {
				/* Rewrite */
				if (l)
					l->next = e->next;
				else
					helpers = e->next;
				e->next = NULL;
				break;
			}
		}
		l = cur;
		cur = cur->next;
	}
	ast_pthread_mutex_unlock(&clilock);
	return 0;
}

int ast_cli_register(struct ast_cli_entry *e)
{
	struct ast_cli_entry *cur, *l=NULL;
	char fulle[80] ="", fulltst[80] ="";
	static int len;
	ast_pthread_mutex_lock(&clilock);
	join2(fulle, sizeof(fulle), e->cmda);
	if (find_cli(e->cmda, -1)) {
		ast_pthread_mutex_unlock(&clilock);
		ast_log(LOG_WARNING, "Command '%s' already registered (or something close enough)\n", fulle);
		return -1;
	}
	cur = helpers;
	while(cur) {
		join2(fulltst, sizeof(fulltst), cur->cmda);
		len = strlen(fulltst);
		if (strlen(fulle) < len)
			len = strlen(fulle);
		if (strncasecmp(fulle, fulltst, len) < 0) {
			if (l) {
				e->next = l->next;
				l->next = e;
			} else {
				e->next = helpers;
				helpers = e;
			}
			break;
		}
		l = cur;
		cur = cur->next;
	}
	if (!cur) {
		if (l)
			l->next = e;
		else
			helpers = e;
		e->next = NULL;
	}
	ast_pthread_mutex_unlock(&clilock);
	return 0;
}

static int help_workhorse(int fd, char *match[])
{
	char fullcmd1[80];
	char fullcmd2[80];
	char matchstr[80];
	char *fullcmd;
	struct ast_cli_entry *e, *e1, *e2;
	e1 = builtins;
	e2 = helpers;
	if (match)
		join(matchstr, sizeof(matchstr), match);
	while(e1->cmda[0] || e2) {
		if (e2)
			join(fullcmd2, sizeof(fullcmd2), e2->cmda);
		if (e1->cmda[0])
			join(fullcmd1, sizeof(fullcmd1), e1->cmda);
		if (!e1->cmda[0] || 
				(e2 && (strcmp(fullcmd2, fullcmd1) < 0))) {
			/* Use e2 */
			e = e2;
			fullcmd = fullcmd2;
			/* Increment by going to next */
			e2 = e2->next;
		} else {
			/* Use e1 */
			e = e1;
			fullcmd = fullcmd1;
			e1++;
		}
		/* Hide commands that start with '_' */
		if (fullcmd[0] == '_')
			continue;
		if (match) {
			if (strncasecmp(matchstr, fullcmd, strlen(matchstr))) {
				continue;
			}
		}
		ast_cli(fd, "%20.20s   %s\n", fullcmd, e->summary);
	}
	return 0;
}

static int handle_help(int fd, int argc, char *argv[]) {
	struct ast_cli_entry *e;
	char fullcmd[80];
	if ((argc < 1))
		return RESULT_SHOWUSAGE;
	if (argc > 1) {
		e = find_cli(argv + 1, 1);
		if (e) 
			ast_cli(fd, e->usage);
		else {
			if (find_cli(argv + 1, -1)) {
				return help_workhorse(fd, argv + 1);
			} else {
				join(fullcmd, sizeof(fullcmd), argv+1);
				ast_cli(fd, "No such command '%s'.\n", fullcmd);
			}
		}
	} else {
		return help_workhorse(fd, NULL);
	}
	return RESULT_SUCCESS;
}

static char *parse_args(char *s, int *max, char *argv[])
{
	char *dup, *cur;
	int x=0;
	int quoted=0;
	int escaped=0;
	int whitespace=1;

	dup = strdup(s);
	if (dup) {
		cur = dup;
		while(*s) {
			switch(*s) {
			case '"':
				/* If it's escaped, put a literal quote */
				if (escaped) 
					goto normal;
				else 
					quoted = !quoted;
				if (quoted && whitespace) {
					/* If we're starting a quote, coming off white space start a new word, too */
					argv[x++] = cur;
					whitespace=0;
				}
				escaped = 0;
				break;
			case ' ':
			case '\t':
				if (!quoted && !escaped) {
					/* If we're not quoted, mark this as whitespace, and
					   end the previous argument */
					whitespace = 1;
					*(cur++) = '\0';
				} else
					/* Otherwise, just treat it as anything else */ 
					goto normal;
				break;
			case '\\':
				/* If we're escaped, print a literal, otherwise enable escaping */
				if (escaped) {
					goto normal;
				} else {
					escaped=1;
				}
				break;
			default:
normal:
				if (whitespace) {
					if (x >= AST_MAX_ARGS -1) {
						ast_log(LOG_WARNING, "Too many arguments, truncating\n");
						break;
					}
					/* Coming off of whitespace, start the next argument */
					argv[x++] = cur;
					whitespace=0;
				}
				*(cur++) = *s;
				escaped=0;
			}
			s++;
		}
		/* Null terminate */
		*(cur++) = '\0';
		argv[x] = NULL;
		*max = x;
	}
	return dup;
}

/* This returns the number of unique matches for the generator */
int ast_cli_generatornummatches(char *text, char *word)
{
	int matches = 0, i = 0;
	char *buf, *oldbuf;


	while ( (buf = ast_cli_generator(text, word, i)) ) {
		if (++i > 1 && strcmp(buf,oldbuf) == 0)  
				continue;
		oldbuf = buf;
		matches++;
	}

	return matches;
}

char **ast_cli_completion_matches(char *text, char *word)
{
	char **match_list = NULL, *retstr, *prevstr;
	size_t match_list_len, max_equal, which, i;
	int matches = 0;

	match_list_len = 1;
	while ((retstr = ast_cli_generator(text, word, matches)) != NULL) {
		if (matches + 1 >= match_list_len) {
			match_list_len <<= 1;
			match_list = realloc(match_list, match_list_len * sizeof(char *));
		}
		match_list[++matches] = retstr;
	}

	if (!match_list)
		return (char **) NULL;

	which = 2;
	prevstr = match_list[1];
	max_equal = strlen(prevstr);
	for (; which <= matches; which++) {
		for (i = 0; i < max_equal && prevstr[i] == match_list[which][i]; i++)
			continue;
		max_equal = i;
	}

	retstr = malloc(max_equal + 1);
	(void) strncpy(retstr, match_list[1], max_equal);
	retstr[max_equal] = '\0';
	match_list[0] = retstr;

	if (matches + 1 >= match_list_len)
		match_list = realloc(match_list, (match_list_len + 1) * sizeof(char *));
	match_list[matches + 1] = (char *) NULL;

	return (match_list);
}

static char *__ast_cli_generator(char *text, char *word, int state, int lock)
{
	char *argv[AST_MAX_ARGS];
	struct ast_cli_entry *e, *e1, *e2;
	int x;
	int matchnum=0;
	char *dup, *res;
	char fullcmd1[80];
	char fullcmd2[80];
	char matchstr[80];
	char *fullcmd;

	if ((dup = parse_args(text, &x, argv))) {
		join(matchstr, sizeof(matchstr), argv);
		if (lock)
			ast_pthread_mutex_lock(&clilock);
		e1 = builtins;
		e2 = helpers;
		while(e1->cmda[0] || e2) {
			if (e2)
				join(fullcmd2, sizeof(fullcmd2), e2->cmda);
			if (e1->cmda[0])
				join(fullcmd1, sizeof(fullcmd1), e1->cmda);
			if (!e1->cmda[0] || 
					(e2 && (strcmp(fullcmd2, fullcmd1) < 0))) {
				/* Use e2 */
				e = e2;
				fullcmd = fullcmd2;
				/* Increment by going to next */
				e2 = e2->next;
			} else {
				/* Use e1 */
				e = e1;
				fullcmd = fullcmd1;
				e1++;
			}
			if ((fullcmd[0] != '_') && !strncasecmp(matchstr, fullcmd, strlen(matchstr))) {
				/* We contain the first part of one or more commands */
				matchnum++;
				if (matchnum > state) {
					/* Now, what we're supposed to return is the next word... */
					if (strlen(word)) {
						res = e->cmda[x-1];
					} else {
						res = e->cmda[x];
					}
					if (res) {
						if (lock)
							ast_pthread_mutex_unlock(&clilock);
						return res ? strdup(res) : NULL;
					}
				}
			}
			if (e->generator && !strncasecmp(matchstr, fullcmd, strlen(fullcmd))) {
				/* We have a command in its entirity within us -- theoretically only one
				   command can have this occur */
				fullcmd = e->generator(text, word, (strlen(word) ? (x - 1) : (x)), state);
				if (lock)
					ast_pthread_mutex_unlock(&clilock);
				return fullcmd;
			}
			
		}
		if (lock)
			ast_pthread_mutex_unlock(&clilock);
		free(dup);
	}
	return NULL;
}

char *ast_cli_generator(char *text, char *word, int state)
{
	return __ast_cli_generator(text, word, state, 1);
}

int ast_cli_command(int fd, char *s)
{
	char *argv[AST_MAX_ARGS];
	struct ast_cli_entry *e;
	int x;
	char *dup;
	x = AST_MAX_ARGS;
	if ((dup = parse_args(s, &x, argv))) {
		/* We need at least one entry, or ignore */
		if (x > 0) {
			ast_pthread_mutex_lock(&clilock);
			e = find_cli(argv, 0);
			if (e)
				e->inuse++;
			ast_pthread_mutex_unlock(&clilock);
			if (e) {
				switch(e->handler(fd, x, argv)) {
				case RESULT_SHOWUSAGE:
					ast_cli(fd, e->usage);
					break;
				default:
				}
			} else 
				ast_cli(fd, "No such command '%s' (type 'help' for help)\n", find_best(argv));
			if (e) {
				ast_pthread_mutex_lock(&clilock);
				e->inuse--;
				ast_pthread_mutex_unlock(&clilock);
			}
		}
		free(dup);
	} else {
		ast_log(LOG_WARNING, "Out of memory\n");	
		return -1;
	}
	return 0;
}