pbx.c

	if (!app || ast_strlen_zero(app))
		return -1;
	if (sync) {
		chan = ast_request_and_dial(type, format, data, timeout, reason, cid_num, cid_name);
		if (chan) {
			if (account)
				ast_cdr_setaccount(chan, account);
			
			if(chan->cdr) { /* check if the channel already has a cdr record, if not give it one */
				ast_log(LOG_WARNING, "%s already has a call record??\n", chan->name);
			} else {
				chan->cdr = ast_cdr_alloc();   /* allocate a cdr for the channel */
				if(!chan->cdr) {
					/* allocation of the cdr failed */
					ast_log(LOG_WARNING, "Unable to create Call Detail Record\n");
					free(chan->pbx);
					return -1;  /* return failure */
				}
				/* allocation of the cdr was successful */
				ast_cdr_init(chan->cdr, chan);  /* initilize our channel's cdr */
				ast_cdr_start(chan->cdr);
			}
			
			if (variable) {
				vartmp = ast_strdupa(variable);
				for (var = strtok_r(vartmp, "|", &vartmp); var; var = strtok_r(NULL, "|", &vartmp)) {
					pbx_builtin_setvar( chan, var );
				}
			}
			if (chan->_state == AST_STATE_UP) {
				res = 0;
				if (option_verbose > 3)
					ast_verbose(VERBOSE_PREFIX_4 "Channel %s was answered.\n", chan->name);
				tmp = malloc(sizeof(struct app_tmp));
				if (tmp) {
					memset(tmp, 0, sizeof(struct app_tmp));
					ast_copy_string(tmp->app, app, sizeof(tmp->app));
					if (appdata)
						ast_copy_string(tmp->data, appdata, sizeof(tmp->data));
					tmp->chan = chan;
					if (sync > 1) {
						if (locked_channel)
							ast_mutex_unlock(&chan->lock);
						ast_pbx_run_app(tmp);
					} else {
						pthread_attr_init(&attr);
						pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
						if (locked_channel) 
							ast_mutex_lock(&chan->lock);
						if (ast_pthread_create(&tmp->t, &attr, ast_pbx_run_app, tmp)) {
							ast_log(LOG_WARNING, "Unable to spawn execute thread on %s: %s\n", chan->name, strerror(errno));
							free(tmp);
							if (locked_channel) 
								ast_mutex_unlock(&chan->lock);
							ast_hangup(chan);
							res = -1;
						} else {
							if (locked_channel) 
								*locked_channel = chan;
						}
					}
				} else {
					ast_log(LOG_ERROR, "Out of memory :(\n");
					res = -1;
				}
			} else {
				if (option_verbose > 3)
					ast_verbose(VERBOSE_PREFIX_4 "Channel %s was never answered.\n", chan->name);
				if(chan->cdr) { /* update the cdr */
					/* here we update the status of the call, which sould be busy.
					 * if that fails then we set the status to failed */
					if(ast_cdr_disposition(chan->cdr, chan->hangupcause))
						ast_cdr_failed(chan->cdr);
				}
				ast_hangup(chan);
			}
		}
		
		if(res < 0) { /* the call failed for some reason */
			if(*reason == 0) { /* if the call failed (not busy or no answer)
				            * update the cdr with the failed message */
				cdr_res = ast_pbx_outgoing_cdr_failed();
				if(cdr_res != 0)
					return cdr_res;
			}
		}

	} else {
		as = malloc(sizeof(struct async_stat));
		if (!as)
			return -1;
		memset(as, 0, sizeof(struct async_stat));
		chan = ast_request_and_dial(type, format, data, timeout, reason, cid_num, cid_name);
		if (!chan) {
			free(as);
			return -1;
		}
		if (account)
			ast_cdr_setaccount(chan, account);
		as->chan = chan;
		ast_copy_string(as->app, app, sizeof(as->app));
		if (appdata)
			ast_copy_string(as->appdata,  appdata, sizeof(as->appdata));
		as->timeout = timeout;
		if (variable) {
			vartmp = ast_strdupa(variable);
			for (var = strtok_r(vartmp, "|", &vartmp); var; var = strtok_r(NULL, "|", &vartmp))
				pbx_builtin_setvar( chan, var );
		}
		/* Start a new thread, and get something handling this channel. */
		pthread_attr_init(&attr);
		pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
		if (locked_channel) 
			ast_mutex_lock(&chan->lock);
		if (ast_pthread_create(&as->p, &attr, async_wait, as)) {
			ast_log(LOG_WARNING, "Failed to start async wait\n");
			free(as);
			if (locked_channel) 
				ast_mutex_unlock(&chan->lock);
			ast_hangup(chan);
			return -1;
		} else {
			if (locked_channel)
				*locked_channel = chan;
		}
		res = 0;
	}
	return res;
}

static void destroy_exten(struct ast_exten *e)
{
	if (e->priority == PRIORITY_HINT)
		ast_remove_hint(e);

	if (e->datad)
		e->datad(e->data);
	free(e);
}

void __ast_context_destroy(struct ast_context *con, const char *registrar)
{
	struct ast_context *tmp, *tmpl=NULL;
	struct ast_include *tmpi, *tmpil= NULL;
	struct ast_sw *sw, *swl= NULL;
	struct ast_exten *e, *el, *en;
	struct ast_ignorepat *ipi, *ipl = NULL;

	ast_mutex_lock(&conlock);
	tmp = contexts;
	while(tmp) {
		if (((tmp->name && con && con->name && !strcasecmp(tmp->name, con->name)) || !con) &&
		    (!registrar || !strcasecmp(registrar, tmp->registrar))) {
			/* Okay, let's lock the structure to be sure nobody else
			   is searching through it. */
			if (ast_mutex_lock(&tmp->lock)) {
				ast_log(LOG_WARNING, "Unable to lock context lock\n");
				return;
			}
			if (tmpl)
				tmpl->next = tmp->next;
			else
				contexts = tmp->next;
			/* Okay, now we're safe to let it go -- in a sense, we were
			   ready to let it go as soon as we locked it. */
			ast_mutex_unlock(&tmp->lock);
			for (tmpi = tmp->includes; tmpi; ) {
				/* Free includes */
				tmpil = tmpi;
				tmpi = tmpi->next;
				free(tmpil);
			}
			for (ipi = tmp->ignorepats; ipi; ) {
				/* Free ignorepats */
				ipl = ipi;
				ipi = ipi->next;
				free(ipl);
			}
			for (sw = tmp->alts; sw; ) {
				/* Free switches */
				swl = sw;
				sw = sw->next;
				free(swl);
				swl = sw;
			}
			for (e = tmp->root; e;) {
				for (en = e->peer; en;) {
					el = en;
					en = en->peer;
					destroy_exten(el);
				}
				el = e;
				e = e->next;
				destroy_exten(el);
			}
			ast_mutex_destroy(&tmp->lock);
			free(tmp);
			if (!con) {
				/* Might need to get another one -- restart */
				tmp = contexts;
				tmpl = NULL;
				tmpil = NULL;
				continue;
			}
			ast_mutex_unlock(&conlock);
			return;
		}
		tmpl = tmp;
		tmp = tmp->next;
	}
	ast_mutex_unlock(&conlock);
}

void ast_context_destroy(struct ast_context *con, const char *registrar)
{
	__ast_context_destroy(con,registrar);
}

static void wait_for_hangup(struct ast_channel *chan, void *data)
{
	int res;
	struct ast_frame *f;
	int waittime;
	
	if (!data || !strlen(data) || (sscanf(data, "%d", &waittime) != 1) || (waittime < 0))
		waittime = -1;
	if (waittime > -1) {
		ast_safe_sleep(chan, waittime * 1000);
	} else do {
		res = ast_waitfor(chan, -1);
		if (res < 0)
			return;
		f = ast_read(chan);
		if (f)
			ast_frfree(f);
	} while(f);
}

static int pbx_builtin_progress(struct ast_channel *chan, void *data)
{
	ast_indicate(chan, AST_CONTROL_PROGRESS);
	return 0;
}

static int pbx_builtin_ringing(struct ast_channel *chan, void *data)
{
	ast_indicate(chan, AST_CONTROL_RINGING);
	return 0;
}

static int pbx_builtin_busy(struct ast_channel *chan, void *data)
{
	ast_indicate(chan, AST_CONTROL_BUSY);		
	wait_for_hangup(chan, data);
	return -1;
}

static int pbx_builtin_congestion(struct ast_channel *chan, void *data)
{
	ast_indicate(chan, AST_CONTROL_CONGESTION);
	wait_for_hangup(chan, data);
	return -1;
}

static int pbx_builtin_answer(struct ast_channel *chan, void *data)
{
	int delay = atoi(data);
	int res;
	if (chan->_state == AST_STATE_UP)
		delay = 0;
	res = ast_answer(chan);
	if (res)
		return res;
	if (delay)
		res = ast_safe_sleep(chan, delay);
	return res;
}

static int pbx_builtin_setlanguage(struct ast_channel *chan, void *data)
{
	static int deprecation_warning = 0;

	if (!deprecation_warning) {
		ast_log(LOG_WARNING, "SetLanguage is deprecated, please use Set(LANGUAGE()=language) instead.\n");
		deprecation_warning = 1;
	}

	/* Copy the language as specified */
	if (data)
		ast_copy_string(chan->language, (char *) data, sizeof(chan->language));

	return 0;
}

static int pbx_builtin_resetcdr(struct ast_channel *chan, void *data)
{
	int flags = 0;
	/* Reset the CDR as specified */
	if(data) {
		if(strchr((char *)data, 'w'))
			flags |= AST_CDR_FLAG_POSTED;
		if(strchr((char *)data, 'a'))
			flags |= AST_CDR_FLAG_LOCKED;
		if(strchr((char *)data, 'v'))
			flags |= AST_CDR_FLAG_KEEP_VARS;
	}

	ast_cdr_reset(chan->cdr, flags);
	return 0;
}

static int pbx_builtin_setaccount(struct ast_channel *chan, void *data)
{
	/* Copy the account code  as specified */
	if (data)
		ast_cdr_setaccount(chan, (char *)data);
	else
		ast_cdr_setaccount(chan, "");
	return 0;
}

static int pbx_builtin_setamaflags(struct ast_channel *chan, void *data)
{
	/* Copy the AMA Flags as specified */
	if (data)
		ast_cdr_setamaflags(chan, (char *)data);
	else
		ast_cdr_setamaflags(chan, "");
	return 0;
}

static int pbx_builtin_hangup(struct ast_channel *chan, void *data)
{
	/* Just return non-zero and it will hang up */
	return -1;
}

static int pbx_builtin_stripmsd(struct ast_channel *chan, void *data)
{
	char newexten[AST_MAX_EXTENSION] = "";

	if (!data || !atoi(data)) {
		ast_log(LOG_DEBUG, "Ignoring, since number of digits to strip is 0\n");
		return 0;
	}
	if (strlen(chan->exten) > atoi(data)) {
		ast_copy_string(newexten, chan->exten + atoi(data), sizeof(newexten));
	}
	ast_copy_string(chan->exten, newexten, sizeof(chan->exten));
	return 0;
}

static int pbx_builtin_prefix(struct ast_channel *chan, void *data)
{
	char newexten[AST_MAX_EXTENSION] = "";

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_DEBUG, "Ignoring, since there is no prefix to add\n");
		return 0;
	}
	snprintf(newexten, sizeof(newexten), "%s%s", (char *)data, chan->exten);
	ast_copy_string(chan->exten, newexten, sizeof(chan->exten));
	if (option_verbose > 2)
		ast_verbose(VERBOSE_PREFIX_3 "Prepended prefix, new extension is %s\n", chan->exten);
	return 0;
}

static int pbx_builtin_suffix(struct ast_channel *chan, void *data)
{
	char newexten[AST_MAX_EXTENSION] = "";

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_DEBUG, "Ignoring, since there is no suffix to add\n");
		return 0;
	}
	snprintf(newexten, sizeof(newexten), "%s%s", chan->exten, (char *)data);
	ast_copy_string(chan->exten, newexten, sizeof(chan->exten));
	if (option_verbose > 2)
		ast_verbose(VERBOSE_PREFIX_3 "Appended suffix, new extension is %s\n", chan->exten);
	return 0;
}

static int pbx_builtin_gotoiftime(struct ast_channel *chan, void *data)
{
	int res=0;
	char *s, *ts;
	struct ast_timing timing;

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "GotoIfTime requires an argument:\n  <time range>|<days of week>|<days of month>|<months>?[[context|]extension|]priority\n");
		return -1;
	}

	if ((s = ast_strdupa((char *) data))) {
		ts = s;

		/* Separate the Goto path */
		strsep(&ts,"?");

		/* struct ast_include include contained garbage here, fixed by zeroing it on get_timerange */
		if (ast_build_timing(&timing, s) && ast_check_timing(&timing))
			res = pbx_builtin_goto(chan, (void *)ts);
	} else {
		ast_log(LOG_ERROR, "Memory Error!\n");
	}
	return res;
}

static int pbx_builtin_execiftime(struct ast_channel *chan, void *data)
{
	int res = 0;
	char *ptr1, *ptr2;
	struct ast_timing timing;
	const char *usage = "ExecIfTime requires an argument:\n  <time range>|<days of week>|<days of month>|<months>?<appname>[|<appargs>]";

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "%s\n", usage);	
		return -1;
	}

	if ((ptr1 = ast_strdupa((char *) data))) {
		ptr2 = ptr1;
		/* Separate the Application data ptr1 is the time spec ptr2 is the app|data*/
		strsep(&ptr2,"?");
		if(!(res = ast_build_timing(&timing, ptr1))) {
			ast_log(LOG_WARNING, "Invalid Time Spec: %s\nCorrect usage: %s\n", ptr1, usage);
			res = -1;
		}
		
		if (!res && ast_check_timing(&timing)) {
			if (ptr2) {
				/* ptr2 is now the app name 
				   we're done with ptr1 now so recycle it and use it to point to the app args*/
				struct ast_app *app;
				if((ptr1 = strchr(ptr2, '|'))) {
					*ptr1 = '\0';
					ptr1++;
				}
				if ((app = pbx_findapp(ptr2))) {
					res = pbx_exec(chan, app, ptr1 ? ptr1 : "", 1);
				} else {
					ast_log(LOG_WARNING, "Cannot locate application %s\n", ptr2);
					res = -1;
				}
			} else {
				ast_log(LOG_WARNING, "%s\n", usage);
			}
		}
	} else {
		ast_log(LOG_ERROR, "Memory Error!\n");
		res = -1;
	}
	return res;
}

static int pbx_builtin_wait(struct ast_channel *chan, void *data)
{
	int ms;

	/* Wait for "n" seconds */
	if (data && atof((char *)data)) {
		ms = atof((char *)data) * 1000;
		return ast_safe_sleep(chan, ms);
	}
	return 0;
}

static int pbx_builtin_waitexten(struct ast_channel *chan, void *data)
{
	int ms, res, argc;
	char *args;
	char *argv[2];
	char *options = NULL; 
	char *mohclass = NULL;
	char *timeout = NULL;
	struct ast_flags flags = {0};

	args = ast_strdupa(data);

	if ((argc = ast_separate_app_args(args, '|', argv, sizeof(argv) / sizeof(argv[0])))) {
		if (argc > 0) {
			timeout = argv[0];
			if (argc > 1)
				options = argv[1];
		}
	}

	if (options) {
		char *opts[1];
		ast_parseoptions(waitexten_opts, &flags, opts, options);
		if (ast_test_flag(&flags, WAITEXTEN_MOH)) {
			mohclass = opts[0];
		}
	}
	
	if (ast_test_flag(&flags, WAITEXTEN_MOH))
		ast_moh_start(chan, mohclass);

	/* Wait for "n" seconds */
	if (timeout && atof((char *)timeout)) 
		ms = atof((char *)timeout) * 1000;
	else if (chan->pbx)
		ms = chan->pbx->rtimeout * 1000;
	else
		ms = 10000;
	res = ast_waitfordigit(chan, ms);
	if (!res) {
		if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 1, chan->cid.cid_num)) {
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Timeout on %s, continuing...\n", chan->name);
		} else if (ast_exists_extension(chan, chan->context, "t", 1, chan->cid.cid_num)) {
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Timeout on %s, going to 't'\n", chan->name);
			ast_copy_string(chan->exten, "t", sizeof(chan->exten));
			chan->priority = 0;
		} else {
			ast_log(LOG_WARNING, "Timeout but no rule 't' in context '%s'\n", chan->context);
			res = -1;
		}
	}

	if (ast_test_flag(&flags, WAITEXTEN_MOH))
		ast_moh_stop(chan);

	return res;
}

static int pbx_builtin_background(struct ast_channel *chan, void *data)
{
	int res = 0;
	int argc;
	char *args;
	char *argv[3];
	char *options = NULL; 
	char *filename = NULL;
	char *front = NULL, *back = NULL;
	char *lang = NULL;
	struct ast_flags flags = {0};

	args = ast_strdupa(data);

	if ((argc = ast_separate_app_args(args, '|', argv, sizeof(argv) / sizeof(argv[0])))) {
		if (argc > 0) {
			filename = argv[0];
			if (argc > 1)
				options = argv[1];
			if (argc > 2)
				lang = argv[2];
		} else {
			ast_log(LOG_WARNING, "Background requires an argument (filename)\n");
		}
	}

	if (!lang)
		lang = chan->language;

	if (options) {
		if (!strcasecmp(options, "skip"))
			flags.flags = BACKGROUND_SKIP;
		else if (!strcasecmp(options, "noanswer"))
			flags.flags = BACKGROUND_NOANSWER;
		else
			ast_parseoptions(background_opts, &flags, NULL, options);
	}

	/* Answer if need be */
	if (chan->_state != AST_STATE_UP) {
		if (ast_test_flag(&flags, BACKGROUND_SKIP)) {
			return 0;
		} else if (!ast_test_flag(&flags, BACKGROUND_NOANSWER)) {
			res = ast_answer(chan);
		}
	}

	if (!res) {
		/* Stop anything playing */
		ast_stopstream(chan);
		/* Stream a file */
		front = filename;
		while(!res && front) {
			if((back = strchr(front, '&'))) {
				*back = '\0';
				back++;
			}
			res = ast_streamfile(chan, front, lang);
			if (!res) {
				res = ast_waitstream(chan, AST_DIGIT_ANY);
				ast_stopstream(chan);
			} else {
				ast_log(LOG_WARNING, "ast_streamfile failed on %s for %s\n", chan->name, (char*)data);
				res = 0;
				break;
			}
			front = back;
		}
	}
	return res;
}

static int pbx_builtin_atimeout(struct ast_channel *chan, void *data)
{
	static int deprecation_warning = 0;
	int x = atoi((char *) data);

	if (!deprecation_warning) {
		ast_log(LOG_WARNING, "AbsoluteTimeout is deprecated, please use Set(TIMEOUT(absolute)=timeout) instead.\n");
		deprecation_warning = 1;
	}
			
	/* Set the absolute maximum time how long a call can be connected */
	ast_channel_setwhentohangup(chan,x);
	if (option_verbose > 2)
		ast_verbose( VERBOSE_PREFIX_3 "Set Absolute Timeout to %d\n", x);
	return 0;
}

static int pbx_builtin_rtimeout(struct ast_channel *chan, void *data)
{
	static int deprecation_warning = 0;

	if (!deprecation_warning) {
		ast_log(LOG_WARNING, "ResponseTimeout is deprecated, please use Set(TIMEOUT(response)=timeout) instead.\n");
		deprecation_warning = 1;
	}

	/* If the channel is not in a PBX, return now */
	if (!chan->pbx)
		return 0;

	/* Set the timeout for how long to wait between digits */
	chan->pbx->rtimeout = atoi((char *)data);
	if (option_verbose > 2)
		ast_verbose( VERBOSE_PREFIX_3 "Set Response Timeout to %d\n", chan->pbx->rtimeout);
	return 0;
}

static int pbx_builtin_dtimeout(struct ast_channel *chan, void *data)
{
	static int deprecation_warning = 0;

	if (!deprecation_warning) {
		ast_log(LOG_WARNING, "DigitTimeout is deprecated, please use Set(TIMEOUT(digit)=timeout) instead.\n");
		deprecation_warning = 1;
	}

	/* If the channel is not in a PBX, return now */
	if (!chan->pbx)
		return 0;

	/* Set the timeout for how long to wait between digits */
	chan->pbx->dtimeout = atoi((char *)data);
	if (option_verbose > 2)
		ast_verbose( VERBOSE_PREFIX_3 "Set Digit Timeout to %d\n", chan->pbx->dtimeout);
	return 0;
}

static int pbx_builtin_goto(struct ast_channel *chan, void *data)
{
	int res;
	res = ast_parseable_goto(chan, (const char *) data);
	if (!res && (option_verbose > 2))
		ast_verbose( VERBOSE_PREFIX_3 "Goto (%s,%s,%d)\n", chan->context,chan->exten, chan->priority+1);
	return res;
}


int pbx_builtin_serialize_variables(struct ast_channel *chan, char *buf, size_t size) 
{
	struct ast_var_t *variables;
	struct varshead *headp;
	char *var=NULL ,*val=NULL;
	int total = 0;

	memset(buf,0,size);
	if (chan) {
		headp=&chan->varshead;
		AST_LIST_TRAVERSE(headp,variables,entries) {
			if(chan && variables && (var=ast_var_name(variables)) && (val=ast_var_value(variables)) && !ast_strlen_zero(var) && !ast_strlen_zero(val)) {
				snprintf(buf + strlen(buf), size - strlen(buf), "%s=%s\n", var, val);
				if(strlen(buf) >= size) {
					ast_log(LOG_ERROR,"Data Buffer Size Exceeded!\n");
					break;
				}
				total++;
			} else 
				break;
		}
	}
	
	return total;
}

char *pbx_builtin_getvar_helper(struct ast_channel *chan, const char *name) 
{
	struct ast_var_t *variables;
	struct varshead *headp;

	if (chan)
		headp=&chan->varshead;
	else
		headp=&globals;

	if (name) {
		AST_LIST_TRAVERSE(headp,variables,entries) {
			if (!strcmp(name, ast_var_name(variables)))
				return ast_var_value(variables);
		}
		if (headp != &globals) {
			/* Check global variables if we haven't already */
			headp = &globals;
			AST_LIST_TRAVERSE(headp,variables,entries) {
				if (!strcmp(name, ast_var_name(variables)))
					return ast_var_value(variables);
			}
		}
	}
	return NULL;
}

void pbx_builtin_setvar_helper(struct ast_channel *chan, const char *name, const char *value)
{
	struct ast_var_t *newvariable;
	struct varshead *headp;


	if (name[strlen(name)-1] == ')')
		return ast_func_write(chan, name, value);

	headp = (chan) ? &chan->varshead : &globals;

	AST_LIST_TRAVERSE (headp, newvariable, entries) {
		if (strcasecmp(ast_var_name(newvariable), name) == 0) {
			/* there is already such a variable, delete it */
			AST_LIST_REMOVE(headp, newvariable, entries);
			ast_var_delete(newvariable);
			break;
		}
	} 

	if (value) {
		if ((option_verbose > 1) && (headp == &globals))
			ast_verbose(VERBOSE_PREFIX_2 "Setting global variable '%s' to '%s'\n", name, value);
		newvariable = ast_var_assign(name, value);	
		AST_LIST_INSERT_HEAD(headp, newvariable, entries);
	}
}

int pbx_builtin_setvar_old(struct ast_channel *chan, void *data)
{
	static int deprecation_warning = 0;

	if (!deprecation_warning) {
		ast_log(LOG_WARNING, "SetVar is deprecated, please use Set instead.\n");
		deprecation_warning = 1;
	}

	return pbx_builtin_setvar(chan, data);
}

int pbx_builtin_setvar(struct ast_channel *chan, void *data)
{
	char *name, *value, *mydata;
	int argc;
	char *argv[24];		/* this will only support a maximum of 24 variables being set in a single operation */
	int global = 0;
	int x;

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "Set requires at least one variable name/value pair.\n");
		return 0;
	}

	mydata = ast_strdupa(data);
	argc = ast_separate_app_args(mydata, '|', argv, sizeof(argv) / sizeof(argv[0]));

	/* check for a trailing flags argument */
	if ((argc > 1) && !strchr(argv[argc-1], '=')) {
		argc--;
		if (strchr(argv[argc], 'g'))
			global = 1;
	}

	for (x = 0; x < argc; x++) {
		name = argv[x];
		if ((value = strchr(name, '='))) {
			*value = '\0';
			value++;
			pbx_builtin_setvar_helper((global) ? NULL : chan, name, value);
		} else
			ast_log(LOG_WARNING, "Ignoring entry '%s' with no = (and not last 'options' entry)\n", name);
	}

	return(0);
}

int pbx_builtin_importvar(struct ast_channel *chan, void *data)
{
	char *name;
	char *value;
	char *stringp=NULL;
	char *channel;
	struct ast_channel *chan2;
	char tmp[4096]="";
	char *s;

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "Ignoring, since there is no variable to set\n");
		return 0;
	}

	stringp = ast_strdupa(data);
	name = strsep(&stringp,"=");
	channel = strsep(&stringp,"|"); 
	value = strsep(&stringp,"\0");
	if (channel && value && name) {
		chan2 = ast_get_channel_by_name_locked(channel);
		if (chan2) {
			s = alloca(strlen(value) + 4);
			if (s) {
				sprintf(s, "${%s}", value);
				pbx_substitute_variables_helper(chan2, s, tmp, sizeof(tmp) - 1);
			}
			ast_mutex_unlock(&chan2->lock);
		}
		pbx_builtin_setvar_helper(chan, name, tmp);
	}

	return(0);
}

static int pbx_builtin_setglobalvar(struct ast_channel *chan, void *data)
{
	char *name;
	char *value;
	char *stringp = NULL;

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "Ignoring, since there is no variable to set\n");
		return 0;
	}

	stringp = data;
	name = strsep(&stringp, "=");
	value = strsep(&stringp, "\0"); 

	pbx_builtin_setvar_helper(NULL, name, value);

	return(0);
}

static int pbx_builtin_noop(struct ast_channel *chan, void *data)
{
	return 0;
}


void pbx_builtin_clear_globals(void)
{
	struct ast_var_t *vardata;
	while (!AST_LIST_EMPTY(&globals)) {
		vardata = AST_LIST_REMOVE_HEAD(&globals, entries);
		ast_var_delete(vardata);
	}
}

static int pbx_checkcondition(char *condition) 
{
	return condition ? atoi(condition) : 0;
}

static int pbx_builtin_gotoif(struct ast_channel *chan, void *data)
{
	char *condition,*branch1,*branch2,*branch;
	char *s;
	int rc;
	char *stringp=NULL;

	if (!data || ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "Ignoring, since there is no variable to check\n");
		return 0;
	}
	
	s=ast_strdupa(data);
	stringp=s;
	condition=strsep(&stringp,"?");
	branch1=strsep(&stringp,":");
	branch2=strsep(&stringp,"");
	branch = pbx_checkcondition(condition) ? branch1 : branch2;
	
	if ((branch==NULL) || ast_strlen_zero(branch)) {
		ast_log(LOG_DEBUG, "Not taking any branch\n");
		return(0);
	}
	
	rc=pbx_builtin_goto(chan,branch);

	return(rc);
}           

static int pbx_builtin_saynumber(struct ast_channel *chan, void *data)
{
	int res = 0;
	char tmp[256];
	char *number = (char *) NULL;
	char *options = (char *) NULL;

	
	if (!data || ast_strlen_zero((char *)data)) {
		ast_log(LOG_WARNING, "SayNumber requires an argument (number)\n");
		return -1;
	}
	ast_copy_string(tmp, (char *) data, sizeof(tmp));
	number=tmp;
	strsep(&number, "|");
	options = strsep(&number, "|");
	if (options) { 
		if ( strcasecmp(options, "f") && strcasecmp(options,"m") && 
			strcasecmp(options, "c") && strcasecmp(options, "n") ) {
			ast_log(LOG_WARNING, "SayNumber gender option is either 'f', 'm', 'c' or 'n'\n");
			return -1;
		}
	}
	return res = ast_say_number(chan, atoi((char *) tmp), "", chan->language, options);
}

static int pbx_builtin_saydigits(struct ast_channel *chan, void *data)
{
	int res = 0;

	if (data)
		res = ast_say_digit_str(chan, (char *)data, "", chan->language);
	return res;
}
	
static int pbx_builtin_saycharacters(struct ast_channel *chan, void *data)
{
	int res = 0;

	if (data)
		res = ast_say_character_str(chan, (char *)data, "", chan->language);
	return res;
}
	
static int pbx_builtin_sayphonetic(struct ast_channel *chan, void *data)
{
	int res = 0;

	if (data)
		res = ast_say_phonetic_str(chan, (char *)data, "", chan->language);
	return res;
}
	
int load_pbx(void)
{
	int x;

	/* Initialize the PBX */
	if (option_verbose) {
		ast_verbose( "Asterisk PBX Core Initializing\n");
		ast_verbose( "Registering builtin applications:\n");
	}
	AST_LIST_HEAD_INIT(&globals);
	ast_cli_register_multiple(pbx_cli, sizeof(pbx_cli) / sizeof(pbx_cli[0]));

	/* Register builtin applications */
	for (x=0; x<sizeof(builtins) / sizeof(struct pbx_builtin); x++) {
		if (option_verbose)
			ast_verbose( VERBOSE_PREFIX_1 "[%s]\n", builtins[x].name);
		if (ast_register_application(builtins[x].name, builtins[x].execute, builtins[x].synopsis, builtins[x].description)) {
			ast_log(LOG_ERROR, "Unable to register builtin application '%s'\n", builtins[x].name);
			return -1;
		}
	}
	return 0;
}

/*
 * Lock context list functions ...
 */
int ast_lock_contexts()
{
	return ast_mutex_lock(&conlock);
}

int ast_unlock_contexts()
{
	return ast_mutex_unlock(&conlock);
}

/*
 * Lock context ...
 */
int ast_lock_context(struct ast_context *con)
{
	return ast_mutex_lock(&con->lock);
}

int ast_unlock_context(struct ast_context *con)
{
	return ast_mutex_unlock(&con->lock);