cli.c

/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2006, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Standard Command Line Interface
 *
 * \author Mark Spencer <markster@digium.com> 
 */

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include <unistd.h>
#include <stdlib.h>
#include <sys/signal.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <ctype.h>
#include <regex.h>

#include "asterisk/logger.h"
#include "asterisk/options.h"
#include "asterisk/cli.h"
#include "asterisk/linkedlists.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/channel.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/lock.h"
#include "editline/readline/readline.h"
#include "asterisk/threadstorage.h"

AST_THREADSTORAGE(ast_cli_buf);

/*! \brief Initial buffer size for resulting strings in ast_cli() */
#define AST_CLI_INITLEN   256

void ast_cli(int fd, const char *fmt, ...)
{
	int res;
	struct ast_str *buf;
	va_list ap;

	if (!(buf = ast_str_thread_get(&ast_cli_buf, AST_CLI_INITLEN)))
		return;

	va_start(ap, fmt);
	res = ast_str_set_va(&buf, 0, fmt, ap);
	va_end(ap);

	if (res != AST_DYNSTR_BUILD_FAILED)
		ast_carefulwrite(fd, buf->str, strlen(buf->str), 100);
}

static AST_LIST_HEAD_STATIC(helpers, ast_cli_entry);

static const char logger_mute_help[] = 
"Usage: logger mute\n"
"       Disables logging output to the current console, making it possible to\n"
"       gather information without being disturbed by scrolling lines.\n";

static const 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 const char group_show_channels_help[] = 
"Usage: group show channels [pattern]\n"
"       Lists all currently active channels with channel group(s) specified.\n"
"       Optional regular expression pattern is matched to group names for each\n"
"       channel.\n";

static char *complete_fn(const char *word, int state)
{
	char *c;
	char filename[256];

	if (word[0] == '/')
		ast_copy_string(filename, word, sizeof(filename));
	else
		snprintf(filename, sizeof(filename), "%s/%s", ast_config_AST_MODULE_DIR, word);

	/* XXX the following function is not reentrant, so we better not use it */
	c = filename_completion_function(filename, state);
	
	if (c && word[0] != '/')
		c += (strlen(ast_config_AST_MODULE_DIR) + 1);
	
	return c ? ast_strdup(c) : c;
}

static char *handle_load(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	/* "module load <mod>" */
	switch (cmd) {
	case CLI_INIT:
		e->command = "module load";
		e->usage =
			"Usage: module load <module name>\n"
			"       Loads the specified module into Asterisk.\n";
		return NULL;

	case CLI_GENERATE:
		if (a->pos != e->args)
			return NULL;
		return complete_fn(a->word, a->n);
	}
	if (a->argc != e->args + 1)
		return CLI_SHOWUSAGE;
	if (ast_load_resource(a->argv[e->args])) {
		ast_cli(a->fd, "Unable to load module %s\n", a->argv[e->args]);
		return CLI_FAILURE;
	}
	return CLI_SUCCESS;
}

static char *handle_load_deprecated(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *res = handle_load(e, cmd, a);
	if (cmd == CLI_INIT)
		e->command = "load";
	return res;
}

static char *handle_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	int x;

	switch (cmd) {
	case CLI_INIT:
		e->command = "module reload";
		e->usage =
			"Usage: module reload [module ...]\n"
			"       Reloads configuration files for all listed modules which support\n"
			"       reloading, or for all supported modules if none are listed.\n";
		return NULL;

	case CLI_GENERATE:
		return ast_module_helper(a->line, a->word, a->pos, a->n, a->pos, 1);
	}
	if (a->argc == e->args) {
		ast_module_reload(NULL);
		return CLI_SUCCESS;
	}
	for (x = e->args; x < a->argc; x++) {
		int res = ast_module_reload(a->argv[x]);
		/* XXX reload has multiple error returns, including -1 on error and 2 on success */
		switch (res) {
		case 0:
			ast_cli(a->fd, "No such module '%s'\n", a->argv[x]);
			break;
		case 1:
			ast_cli(a->fd, "Module '%s' does not support reload\n", a->argv[x]);
			break;
		}
	}
	return CLI_SUCCESS;
}

static char *handle_reload_deprecated(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *s = handle_reload(e, cmd, a);
	if (cmd == CLI_INIT)		/* override command name */
		e->command = "reload";
	return s;
}

static char *handle_verbose(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	int oldval;
	int newlevel;
	int atleast = 0;
	int fd = a->fd;
	int argc = a->argc;
	char **argv = a->argv;
	int *dst;
	char *what;

	switch (cmd) {
	case CLI_INIT:
		e->command = "core set {debug|verbose} [off|atleast]";
		e->usage =
			"Usage: core set {debug|verbose} [atleast] <level>\n"
			"       core set {debug|verbose} off\n"
			"       Sets level of debug or verbose messages to be displayed.\n"
			"	0 or off means no messages should be displayed.\n"
			"	Equivalent to -d[d[...]] or -v[v[v...]] on startup\n";
		return NULL;

	case CLI_GENERATE:
		return NULL;
	}
	/* all the above return, so we proceed with the handler.
	 * we are guaranteed to be called with argc >= e->args;
	 */

	if (argc < e->args)
		return CLI_SHOWUSAGE;
	if (!strcasecmp(argv[e->args - 2], "debug")) {
		dst = &option_debug;
		oldval = option_debug;
		what = "Core debug";
	} else {
		dst = &option_verbose;
		oldval = option_verbose;
		what = "Verbosity";
	}
	if (argc == e->args && !strcasecmp(argv[e->args - 1], "off")) {
		newlevel = 0;
		goto done;
	}
	if (!strcasecmp(argv[e->args-1], "atleast"))
		atleast = 1;
	if (argc != e->args + atleast)
		return CLI_SHOWUSAGE;
	if (sscanf(argv[e->args + atleast - 1], "%d", &newlevel) != 1)
		return CLI_SHOWUSAGE;

done:
	if (!atleast || newlevel > *dst)
		*dst = newlevel;
	if (oldval > 0 && *dst == 0)
		ast_cli(fd, "%s is now OFF\n", what);
	else if (*dst > 0) {
		if (oldval == *dst)
			ast_cli(fd, "%s is at least %d\n", what, *dst);
		else
			ast_cli(fd, "%s was %d and is now %d\n", what, oldval, *dst);
	}

	return CLI_SUCCESS;
}

static int handle_logger_mute(int fd, int argc, char *argv[])
{
	if (argc != 2)
		return RESULT_SHOWUSAGE;
	ast_console_toggle_mute(fd);
	return RESULT_SUCCESS;
}

static char *handle_unload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	/* "module unload mod_1 [mod_2 .. mod_N]" */
	int x;
	int force = AST_FORCE_SOFT;
	char *s;

	switch (cmd) {
	case CLI_INIT:
		e->command = "module unload";
		e->usage =
			"Usage: module unload [-f|-h] <module_1> [<module_2> ... ]\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";
		return NULL;

	case CLI_GENERATE:
		return ast_module_helper(a->line, a->word, a->pos, a->n, a->pos, 0);
	}
	if (a->argc < e->args + 1)
		return CLI_SHOWUSAGE;
	x = e->args;	/* first argument */
	s = a->argv[x];
	if (s[0] == '-') {
		if (s[1] == 'f')
			force = AST_FORCE_FIRM;
		else if (s[1] == 'h')
			force = AST_FORCE_HARD;
		else
			return CLI_SHOWUSAGE;
		if (a->argc < e->args + 2)	/* need at least one module name */
			return CLI_SHOWUSAGE;
		x++;	/* skip this argument */
	}

	for (; x < a->argc; x++) {
		if (ast_unload_resource(a->argv[x], force)) {
			ast_cli(a->fd, "Unable to unload resource %s\n", a->argv[x]);
			return CLI_FAILURE;
		}
	}
	return CLI_SUCCESS;
}

static char *handle_unload_deprecated(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *res = handle_unload(e, cmd, a);
	if (cmd == CLI_INIT)
		e->command = "unload";	/* XXX override */
	return res;
}

#define MODLIST_FORMAT  "%-30s %-40.40s %-10d\n"
#define MODLIST_FORMAT2 "%-30s %-40.40s %-10s\n"

AST_MUTEX_DEFINE_STATIC(climodentrylock);
static int climodentryfd = -1;

static int modlist_modentry(const char *module, const char *description, int usecnt, const char *like)
{
	/* Comparing the like with the module */
	if (strcasestr(module, like) ) {
		ast_cli(climodentryfd, MODLIST_FORMAT, module, description, usecnt);
		return 1;
	} 
	return 0;
}

static void print_uptimestr(int fd, time_t timeval, const char *prefix, int printsec)
{
	int x; /* the main part - years, weeks, etc. */
	struct ast_str *out;

#define SECOND (1)
#define MINUTE (SECOND*60)
#define HOUR (MINUTE*60)
#define DAY (HOUR*24)
#define WEEK (DAY*7)
#define YEAR (DAY*365)
#define NEEDCOMMA(x) ((x)? ",": "")	/* define if we need a comma */
	if (timeval < 0)	/* invalid, nothing to show */
		return;

	if (printsec)  {	/* plain seconds output */
		ast_cli(fd, "%s: %lu\n", prefix, (u_long)timeval);
		return;
	}
	out = ast_str_alloca(256);
	if (timeval > YEAR) {
		x = (timeval / YEAR);
		timeval -= (x * YEAR);
		ast_str_append(&out, 0, "%d year%s%s ", x, ESS(x),NEEDCOMMA(timeval));
	}
	if (timeval > WEEK) {
		x = (timeval / WEEK);
		timeval -= (x * WEEK);
		ast_str_append(&out, 0, "%d week%s%s ", x, ESS(x),NEEDCOMMA(timeval));
	}
	if (timeval > DAY) {
		x = (timeval / DAY);
		timeval -= (x * DAY);
		ast_str_append(&out, 0, "%d day%s%s ", x, ESS(x),NEEDCOMMA(timeval));
	}
	if (timeval > HOUR) {
		x = (timeval / HOUR);
		timeval -= (x * HOUR);
		ast_str_append(&out, 0, "%d hour%s%s ", x, ESS(x),NEEDCOMMA(timeval));
	}
	if (timeval > MINUTE) {
		x = (timeval / MINUTE);
		timeval -= (x * MINUTE);
		ast_str_append(&out, 0, "%d minute%s%s ", x, ESS(x),NEEDCOMMA(timeval));
	}
	x = timeval;
	if (x > 0 || out->used == 0)	/* if there is nothing, print 0 seconds */
		ast_str_append(&out, 0, "%d second%s ", x, ESS(x));
	ast_cli(fd, "%s: %s\n", prefix, out->str);
}

static char * handle_showuptime(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	time_t curtime;
	int printsec;

	switch (cmd) {
        case CLI_INIT:
		e->command = "core show uptime [seconds]";
		e->usage =
			"Usage: core show uptime [seconds]\n"
			"       Shows Asterisk uptime information.\n"
			"       The seconds word returns the uptime in seconds only.\n";
		return NULL;

	case CLI_GENERATE:
		return NULL;
	}
	/* regular handler */
	if (a->argc == e->args && !strcasecmp(a->argv[e->args-1],"seconds"))
		printsec = 1;
	else if (a->argc == e->args-1)
		printsec = 0;
	else
		return CLI_SHOWUSAGE;
	curtime = time(NULL);
	if (ast_startuptime)
		print_uptimestr(a->fd, curtime - ast_startuptime, "System uptime", printsec);
	if (ast_lastreloadtime)
		print_uptimestr(a->fd, curtime - ast_lastreloadtime, "Last reload", printsec);
	return CLI_SUCCESS;
}

static char *handle_modlist(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *like;

	switch (cmd) {
	case CLI_INIT:
		e->command = "module show [like]";
		e->usage =
			"Usage: module show [like keyword]\n"
			"       Shows Asterisk modules currently in use, and usage statistics.\n";
		return NULL;

	case CLI_GENERATE:
		if (a->pos == e->args)
			return ast_module_helper(a->line, a->word, a->pos, a->n, a->pos, 0);
		else
			return NULL;
	}
	/* all the above return, so we proceed with the handler.
	 * we are guaranteed to have argc >= e->args
	 */
	if (a->argc == e->args - 1)
		like = "";
	else if (a->argc == e->args + 1 && !strcasecmp(a->argv[e->args-1], "like") )
		like = a->argv[e->args];
	else
		return CLI_SHOWUSAGE;
		
	ast_mutex_lock(&climodentrylock);
	climodentryfd = a->fd; /* global, protected by climodentrylock */
	ast_cli(a->fd, MODLIST_FORMAT2, "Module", "Description", "Use Count");
	ast_cli(a->fd,"%d modules loaded\n", ast_update_module_list(modlist_modentry, like));
	climodentryfd = -1;
	ast_mutex_unlock(&climodentrylock);
	return RESULT_SUCCESS;
}
#undef MODLIST_FORMAT
#undef MODLIST_FORMAT2

static char *handle_chanlist(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
#define FORMAT_STRING  "%-20.20s %-20.20s %-7.7s %-30.30s\n"
#define FORMAT_STRING2 "%-20.20s %-20.20s %-7.7s %-30.30s\n"
#define CONCISE_FORMAT_STRING  "%s!%s!%s!%d!%s!%s!%s!%s!%s!%d!%s!%s\n"
#define VERBOSE_FORMAT_STRING  "%-20.20s %-20.20s %-16.16s %4d %-7.7s %-12.12s %-25.25s %-15.15s %8.8s %-11.11s %-20.20s\n"
#define VERBOSE_FORMAT_STRING2 "%-20.20s %-20.20s %-16.16s %-4.4s %-7.7s %-12.12s %-25.25s %-15.15s %8.8s %-11.11s %-20.20s\n"

	struct ast_channel *c = NULL;
	int numchans = 0, concise = 0, verbose = 0, count = 0;
	int fd, argc;
	char **argv;

	switch (cmd) {
	case CLI_INIT:
		e->command = "core show channels [concise|verbose|count]";
		e->usage =
			"Usage: core show channels [concise|verbose|count]\n"
			"       Lists currently defined channels and some information about them. If\n"
			"       'concise' is specified, the format is abridged and in a more easily\n"
			"       machine parsable format. If 'verbose' is specified, the output includes\n"
			"       more and longer fields. If 'count' is specified only the channel and call\n"
			"       count is output.\n";
		return NULL;

	case CLI_GENERATE:
		return NULL;
	}
	fd = a->fd;
	argc = a->argc;
	argv = a->argv;

	if (a->argc == e->args) {
		if (!strcasecmp(argv[e->args-1],"concise"))
			concise = 1;
		else if (!strcasecmp(argv[e->args-1],"verbose"))
			verbose = 1;
		else if (!strcasecmp(argv[e->args-1],"count"))
			count = 1;
		else
			return CLI_SHOWUSAGE;
	} else if (a->argc != e->args - 1)
		return CLI_SHOWUSAGE;

	if (!count) {
		if (!concise && !verbose)
			ast_cli(fd, FORMAT_STRING2, "Channel", "Location", "State", "Application(Data)");
		else if (verbose)
			ast_cli(fd, VERBOSE_FORMAT_STRING2, "Channel", "Context", "Extension", "Priority", "State", "Application", "Data", 
				"CallerID", "Duration", "Accountcode", "BridgedTo");
	}

	while ((c = ast_channel_walk_locked(c)) != NULL) {
		struct ast_channel *bc = ast_bridged_channel(c);
		char durbuf[10] = "-";

		if (!count) {
			if ((concise || verbose)  && c->cdr && !ast_tvzero(c->cdr->start)) {
				int duration = (int)(ast_tvdiff_ms(ast_tvnow(), c->cdr->start) / 1000);
				if (verbose) {
					int durh = duration / 3600;
					int durm = (duration % 3600) / 60;
					int durs = duration % 60;
					snprintf(durbuf, sizeof(durbuf), "%02d:%02d:%02d", durh, durm, durs);
				} else {
					snprintf(durbuf, sizeof(durbuf), "%d", duration);
				}				
			}
			if (concise) {
				ast_cli(fd, CONCISE_FORMAT_STRING, c->name, c->context, c->exten, c->priority, ast_state2str(c->_state),
					c->appl ? c->appl : "(None)",
					S_OR(c->data, ""),	/* XXX different from verbose ? */
					S_OR(c->cid.cid_num, ""),
					S_OR(c->accountcode, ""),
					c->amaflags, 
					durbuf,
					bc ? bc->name : "(None)");
			} else if (verbose) {
				ast_cli(fd, VERBOSE_FORMAT_STRING, c->name, c->context, c->exten, c->priority, ast_state2str(c->_state),
					c->appl ? c->appl : "(None)",
					c->data ? S_OR(c->data, "(Empty)" ): "(None)",
					S_OR(c->cid.cid_num, ""),
					durbuf,
					S_OR(c->accountcode, ""),
					bc ? bc->name : "(None)");
			} else {
				char locbuf[40] = "(None)";
				char appdata[40] = "(None)";
				
				if (!ast_strlen_zero(c->context) && !ast_strlen_zero(c->exten)) 
					snprintf(locbuf, sizeof(locbuf), "%s@%s:%d", c->exten, c->context, c->priority);
				if (c->appl)
					snprintf(appdata, sizeof(appdata), "%s(%s)", c->appl, S_OR(c->data, ""));
				ast_cli(fd, FORMAT_STRING, c->name, locbuf, ast_state2str(c->_state), appdata);
			}
		}
		numchans++;
		ast_channel_unlock(c);
	}
	if (!concise) {
		ast_cli(fd, "%d active channel%s\n", numchans, ESS(numchans));
		if (option_maxcalls)
			ast_cli(fd, "%d of %d max active call%s (%5.2f%% of capacity)\n",
				ast_active_calls(), option_maxcalls, ESS(ast_active_calls()),
				((double)ast_active_calls() / (double)option_maxcalls) * 100.0);
		else
			ast_cli(fd, "%d active call%s\n", ast_active_calls(), ESS(ast_active_calls()));
	}
	return CLI_SUCCESS;
	
#undef FORMAT_STRING
#undef FORMAT_STRING2
#undef CONCISE_FORMAT_STRING
#undef VERBOSE_FORMAT_STRING
#undef VERBOSE_FORMAT_STRING2
}

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

static const 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 const 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 const 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_get_channel_by_name_locked(argv[2]);
	if (c) {
		ast_cli(fd, "Requested Hangup on channel '%s'\n", c->name);
		ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
		ast_channel_unlock(c);
	} else
		ast_cli(fd, "%s is not a known channel\n", argv[2]);
	return RESULT_SUCCESS;
}

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

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

	if (argc != 4)
		return RESULT_SHOWUSAGE;
	if (!(buf = ast_malloc(buflen)))
		return RESULT_FAILURE;
	buf[len] = '\0';
	matches = ast_cli_completion_matches(argv[2], argv[3]);
	if (matches) {
		for (x=0; matches[x]; x++) {
			matchlen = strlen(matches[x]) + 1;
			if (len + matchlen >= buflen) {
				buflen += matchlen * 3;
				obuf = buf;
				if (!(buf = ast_realloc(obuf, buflen))) 
					/* Memory allocation failure...  Just free old buffer and be done */
					ast_free(obuf);
			}
			if (buf)
				len += sprintf( buf + len, "%s ", matches[x]);
			ast_free(matches[x]);
			matches[x] = NULL;
		}
		ast_free(matches);
	}

	if (buf) {
		ast_cli(fd, "%s%s",buf, AST_CLI_COMPLETE_EOF);
		ast_free(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]);

	ast_cli(fd, "%d", matches);

	return RESULT_SUCCESS;
}

static int handle_commandcomplete(int fd, int argc, char *argv[])
{
	char *buf;

	if (argc != 5)
		return RESULT_SHOWUSAGE;
	buf = __ast_cli_generator(argv[2], argv[3], atoi(argv[4]), 0);
	if (buf) {
		ast_cli(fd, buf);
		ast_free(buf);
	} else
		ast_cli(fd, "NULL\n");
	return RESULT_SUCCESS;
}

static char *handle_core_set_debug_channel(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	struct ast_channel *c = NULL;
	int is_all, is_off = 0;

	switch (cmd) {
	case CLI_INIT:
		e->command = "core set debug channel";
		e->usage =
			"Usage: core set debug channel <all|channel> [off]\n"
			"       Enables/disables debugging on all or on a specific channel.\n";
		return NULL;

	case CLI_GENERATE:
		/* XXX remember to handle the optional "off" */
		if (a->pos != e->args)
			return NULL;
		return a->n == 0 ? ast_strdup("all") : ast_complete_channels(a->line, a->word, a->pos, a->n - 1, e->args);
	}
	/* 'core set debug channel {all|chan_id}' */
	if (a->argc == e->args + 2) {
		if (!strcasecmp(a->argv[e->args + 1], "off"))
			is_off = 1;
		else
			return CLI_SHOWUSAGE;
	} else if (a->argc != e->args + 1)
		return CLI_SHOWUSAGE;

	is_all = !strcasecmp("all", a->argv[e->args]);
	if (is_all) {
		if (is_off) {
			global_fin &= ~DEBUGCHAN_FLAG;
			global_fout &= ~DEBUGCHAN_FLAG;
		} else {
			global_fin |= DEBUGCHAN_FLAG;
			global_fout |= DEBUGCHAN_FLAG;
		}
		c = ast_channel_walk_locked(NULL);
	} else {
		c = ast_get_channel_by_name_locked(a->argv[e->args]);
		if (c == NULL)
			ast_cli(a->fd, "No such channel %s\n", a->argv[e->args]);
	}
	while (c) {
		if (!(c->fin & DEBUGCHAN_FLAG) || !(c->fout & DEBUGCHAN_FLAG)) {
			if (is_off) {
				c->fin &= ~DEBUGCHAN_FLAG;
				c->fout &= ~DEBUGCHAN_FLAG;
			} else {
				c->fin |= DEBUGCHAN_FLAG;
				c->fout |= DEBUGCHAN_FLAG;
			}
			ast_cli(a->fd, "Debugging %s on channel %s\n", is_off ? "disabled" : "enabled", c->name);
		}
		ast_channel_unlock(c);
		if (!is_all)
			break;
		c = ast_channel_walk_locked(c);
	}
	ast_cli(a->fd, "Debugging on new channels is %s\n", is_off ? "disabled" : "enabled");
	return RESULT_SUCCESS;
}

static char *handle_debugchan_deprecated(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *res;

	if (cmd == CLI_HANDLER && a->argc != e->args + 1)
		return CLI_SHOWUSAGE;
	res = handle_core_set_debug_channel(e, cmd, a);
	if (cmd == CLI_INIT)
		e->command = "debug channel";
	return res;
}

static char *handle_nodebugchan_deprecated(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
	char *res;
	if (cmd == CLI_HANDLER) {
		if (a->argc != e->args + 1)
			return CLI_SHOWUSAGE;
		/* pretend we have an extra "off" at the end. We can do this as the array
		 * is NULL terminated so we overwrite that entry.
		 */
		a->argv[e->args+1] = "off";
		a->argc++;
	}
	res = handle_core_set_debug_channel(e, cmd, a);
	if (cmd == CLI_INIT)
		e->command = "no debug channel";
	return res;
}
		
static int handle_showchan(int fd, int argc, char *argv[])
{
	struct ast_channel *c=NULL;
	struct timeval now;
	struct ast_str *out = ast_str_alloca(2048);
	char cdrtime[256];
	char nf[256], wf[256], rf[256];
	long elapsed_seconds=0;
	int hour=0, min=0, sec=0;
	
	if (argc != 4)
		return RESULT_SHOWUSAGE;
	now = ast_tvnow();
	c = ast_get_channel_by_name_locked(argv[3]);
	if (!c) {
		ast_cli(fd, "%s is not a known channel\n", argv[3]);
		return RESULT_SUCCESS;
	}
	if (c->cdr) {
		elapsed_seconds = now.tv_sec - c->cdr->start.tv_sec;
		hour = elapsed_seconds / 3600;
		min = (elapsed_seconds % 3600) / 60;
		sec = elapsed_seconds % 60;
		snprintf(cdrtime, sizeof(cdrtime), "%dh%dm%ds", hour, min, sec);
	} else
		strcpy(cdrtime, "N/A");
	ast_cli(fd, 
		" -- General --\n"
		"           Name: %s\n"
		"           Type: %s\n"
		"       UniqueID: %s\n"
		"      Caller ID: %s\n"
		" Caller ID Name: %s\n"
		"    DNID Digits: %s\n"
		"       Language: %s\n"
		"          State: %s (%d)\n"
		"          Rings: %d\n"
		"  NativeFormats: %s\n"
		"    WriteFormat: %s\n"
		"     ReadFormat: %s\n"
		" WriteTranscode: %s\n"
		"  ReadTranscode: %s\n"
		"1st File Descriptor: %d\n"
		"      Frames in: %d%s\n"
		"     Frames out: %d%s\n"
		" Time to Hangup: %ld\n"
		"   Elapsed Time: %s\n"
		"  Direct Bridge: %s\n"
		"Indirect Bridge: %s\n"
		" --   PBX   --\n"
		"        Context: %s\n"
		"      Extension: %s\n"
		"       Priority: %d\n"
		"     Call Group: %llu\n"
		"   Pickup Group: %llu\n"
		"    Application: %s\n"
		"           Data: %s\n"
		"    Blocking in: %s\n",
		c->name, c->tech->type, c->uniqueid,
		S_OR(c->cid.cid_num, "(N/A)"),
		S_OR(c->cid.cid_name, "(N/A)"),
		S_OR(c->cid.cid_dnid, "(N/A)"), 
		c->language,	
		ast_state2str(c->_state), c->_state, c->rings, 
		ast_getformatname_multiple(nf, sizeof(nf), c->nativeformats), 
		ast_getformatname_multiple(wf, sizeof(wf), c->writeformat), 
		ast_getformatname_multiple(rf, sizeof(rf), c->readformat),
		c->writetrans ? "Yes" : "No",
		c->readtrans ? "Yes" : "No",
		c->fds[0],
		c->fin & ~DEBUGCHAN_FLAG, (c->fin & DEBUGCHAN_FLAG) ? " (DEBUGGED)" : "",
		c->fout & ~DEBUGCHAN_FLAG, (c->fout & DEBUGCHAN_FLAG) ? " (DEBUGGED)" : "",
		(long)c->whentohangup,
		cdrtime, c->_bridge ? c->_bridge->name : "<none>", ast_bridged_channel(c) ? ast_bridged_channel(c)->name : "<none>", 
		c->context, c->exten, c->priority, c->callgroup, c->pickupgroup, ( c->appl ? c->appl : "(N/A)" ),
		( c-> data ? S_OR(c->data, "(Empty)") : "(None)"),
		(ast_test_flag(c, AST_FLAG_BLOCKING) ? c->blockproc : "(Not Blocking)"));
	
	if (pbx_builtin_serialize_variables(c, &out))
		ast_cli(fd,"      Variables:\n%s\n", out->str);
	if (c->cdr && ast_cdr_serialize_variables(c->cdr, &out, '=', '\n', 1))
		ast_cli(fd,"  CDR Variables:\n%s\n", out->str);
	
	ast_channel_unlock(c);
	return RESULT_SUCCESS;
}

/*
 * helper function to generate CLI matches from a fixed set of values.
 * A NULL word is acceptable.
 */
char *ast_cli_complete(const char *word, char *const choices[], int state)
{
	int i, which = 0, len;
	len = ast_strlen_zero(word) ? 0 : strlen(word);

	for (i = 0; choices[i]; i++) {
		if ((!len || !strncasecmp(word, choices[i], len)) && ++which > state)
			return ast_strdup(choices[i]);
	}
	return NULL;
}

char *ast_complete_channels(const char *line, const char *word, int pos, int state, int rpos)
{
	struct ast_channel *c = NULL;
	int which = 0;
	int wordlen;
	char notfound = '\0';
	char *ret = &notfound; /* so NULL can break the loop */

	if (pos != rpos)
		return NULL;

	wordlen = strlen(word);	

	while (ret == &notfound && (c = ast_channel_walk_locked(c))) {
		if (!strncasecmp(word, c->name, wordlen) && ++which > state)
			ret = ast_strdup(c->name);
		ast_channel_unlock(c);
	}
	return ret == &notfound ? NULL : ret;
}

static char *complete_ch_3(const char *line, const char *word, int pos, int state)
{
	return ast_complete_channels(line, word, pos, state, 2);
}

static char *complete_ch_4(const char *line, const char *word, int pos, int state)
{
	return ast_complete_channels(line, word, pos, state, 3);
}

static int group_show_channels(int fd, int argc, char *argv[])
{
#define FORMAT_STRING  "%-25s  %-20s  %-20s\n"

	struct ast_group_info *gi = NULL;
	int numchans = 0;
	regex_t regexbuf;
	int havepattern = 0;

	if (argc < 3 || argc > 4)
		return RESULT_SHOWUSAGE;
	
	if (argc == 4) {
		if (regcomp(&regexbuf, argv[3], REG_EXTENDED | REG_NOSUB))
			return RESULT_SHOWUSAGE;
		havepattern = 1;
	}

	ast_cli(fd, FORMAT_STRING, "Channel", "Group", "Category");

	ast_app_group_list_rdlock();
	
	gi = ast_app_group_list_head();
	while (gi) {
		if (!havepattern || !regexec(&regexbuf, gi->group, 0, NULL, 0)) {
			ast_cli(fd, FORMAT_STRING, gi->chan->name, gi->group, (ast_strlen_zero(gi->category) ? "(default)" : gi->category));
			numchans++;
		}
		gi = AST_LIST_NEXT(gi, list);
	}
	
	ast_app_group_list_unlock();
	
	if (havepattern)
		regfree(&regexbuf);

	ast_cli(fd, "%d active channel%s\n", numchans, ESS(numchans));
	return RESULT_SUCCESS;
#undef FORMAT_STRING
}

/* XXX Nothing in this array can currently be deprecated...
   You have to change the way find_cli works in order to remove this array
   I recommend doing this eventually...
 */
static struct ast_cli_entry builtins[] = {
	/* Keep alphabetized, with longer matches first (example: abcd before abc) */
	{ { "_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 },

	{ { NULL }, NULL, NULL, NULL }
};

static struct ast_cli_entry cli_debug_channel_deprecated = NEW_CLI(handle_debugchan_deprecated, "Enable debugging on channel");
static struct ast_cli_entry cli_module_load_deprecated = NEW_CLI(handle_load_deprecated, "Load a module");
static struct ast_cli_entry cli_module_reload_deprecated = NEW_CLI(handle_reload_deprecated, "reload modules by name");
static struct ast_cli_entry cli_module_unload_deprecated = NEW_CLI(handle_unload_deprecated, "unload modules by name");

static char *handle_help(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);

static struct ast_cli_entry cli_cli[] = {
	/* Deprecated, but preferred command is now consolidated (and already has a deprecated command for it). */
	NEW_CLI(handle_nodebugchan_deprecated, "Disable debugging on channel(s)"),

	NEW_CLI(handle_chanlist, "Display information on channels"),

	{ { "core", "show", "channel", NULL },
	handle_showchan, "Display information on a specific channel",
	showchan_help, complete_ch_4 },

	NEW_CLI(handle_core_set_debug_channel, "Enable/disable debugging on a channel",
		.deprecate_cmd = &cli_debug_channel_deprecated),

	NEW_CLI(handle_verbose, "Set level of debug/verbose chattiness"),

	{ { "group", "show", "channels", NULL },
	group_show_channels, "Display active channels with group(s)",
	group_show_channels_help },

	NEW_CLI(handle_help, "Display help list, or specific help on a command"),

	{ { "logger", "mute", NULL },
	handle_logger_mute, "Toggle logging output to a console",
	logger_mute_help },

	NEW_CLI(handle_modlist, "List modules and info"),