Add contributed WaitUntil app.

Original code by pprindeville, updated for trunk by tilghman.
(Closes issue #11487)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@94052 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_waituntil.c

+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2007, Redfish Solutions
+ *
+ * Philip Prindeville <philipp@redfish-solutions.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 Sleep until the given epoch
+ *
+ * \author Philip Prindeville <philipp@redfish-solutions.com>
+ *
+ * \ingroup applications
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/logger.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/module.h"
+
+static char *app = "WaitUntil";
+static char *synopsis = "Wait (sleep) until the current time is the given epoch";
+static char *descrip =
+"  WaitUntil(<epoch>): Waits until the given time.  Sets WAITUNTILSTATUS to\n"
+"one of the following values:\n"
+"  OK       Wait succeeded\n"
+"  FAILURE  Invalid argument\n"
+"  HANGUP   Channel hung up before time elapsed\n"
+"  PAST     The time specified was already past\n";
+
+static int waituntil_exec(struct ast_channel *chan, void *data)
+{
+	int res;
+	double fraction;
+	struct timeval future = { 0, };
+	struct timeval tv = ast_tvnow();
+	int msec;
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "WaitUntil requires an argument(epoch)\n");
+		pbx_builtin_setvar_helper(chan, "WAITUNTILSTATUS", "FAILURE");
+		return 0;
+	}
+
+	if (sscanf(data, "%ld%lf", (long *)&future.tv_sec, &fraction) == 0) {
+		ast_log(LOG_WARNING, "WaitUntil called with non-numeric argument\n");
+		pbx_builtin_setvar_helper(chan, "WAITUNTILSTATUS", "FAILURE");
+		return 0;
+	}
+
+	future.tv_usec = fraction * 1000000;
+
+	if ((msec = ast_tvdiff_ms(future, tv)) < 0) {
+		ast_log(LOG_NOTICE, "WaitUntil called in the past (now %ld, arg %ld)\n", (long)tv.tv_sec, (long)future.tv_sec);
+		pbx_builtin_setvar_helper(chan, "WAITUNTILSTATUS", "PAST");
+		return 0;
+	}
+
+	if ((res = ast_safe_sleep(chan, msec)))
+		pbx_builtin_setvar_helper(chan, "WAITUNTILSTATUS", "HANGUP");
+	else
+		pbx_builtin_setvar_helper(chan, "WAITUNTILSTATUS", "OK");
+
+	return res;
+}
+
+static int unload_module(void)
+{
+	return ast_unregister_application(app);
+}
+
+static int load_module(void)
+{
+	return ast_register_application(app, waituntil_exec, synopsis, descrip);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Wait until specified time");