100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
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* Copyright (c) 2017 Digi International Inc.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* Digi International Inc. 11001 Bren Road East, Minnetonka, MN 55343
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* =======================================================================
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*/
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#include <aws_iot_log.h>
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#include <signal.h>
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#include <unistd.h>
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/*------------------------------------------------------------------------------
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F U N C T I O N D E C L A R A T I O N S
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------------------------------------------------------------------------------*/
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static int check_stop(void);
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static void add_sigkill_signal(void);
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static void graceful_shutdown(void);
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static void sigint_handler(int signum);
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/*------------------------------------------------------------------------------
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G L O B A L V A R I A B L E S
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------------------------------------------------------------------------------*/
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static volatile int stop = 0;
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/*------------------------------------------------------------------------------
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F U N C T I O N D E F I N I T I O N S
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------------------------------------------------------------------------------*/
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int main(int argc, char **argv)
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{
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int result = EXIT_SUCCESS;
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add_sigkill_signal();
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do {
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sleep(1);
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} while (!check_stop());
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return result;
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}
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/*
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* check_stop() - Stop application
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*
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* Return: 1 if it is successfully stopped, 0 otherwise.
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*/
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static int check_stop(void)
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{
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return stop;
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}
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/*
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* add_sigkill_signal() - Add the kill signal to the process
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*/
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static void add_sigkill_signal(void)
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{
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struct sigaction new_action;
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struct sigaction old_action;
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/* Setup signal hander. */
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atexit(graceful_shutdown);
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new_action.sa_handler = sigint_handler;
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sigemptyset(&new_action.sa_mask);
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new_action.sa_flags = 0;
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sigaction(SIGINT, NULL, &old_action);
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if (old_action.sa_handler != SIG_IGN)
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sigaction(SIGINT, &new_action, NULL);
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}
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/*
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* graceful_shutdown() - Stop MQTT connection and all threads
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*/
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void graceful_shutdown(void)
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{
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stop = 1;
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check_stop();
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}
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/**
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* sigint_handler() - Manage signal received.
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*
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* @signum: Received signal.
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*/
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static void sigint_handler(int signum)
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{
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IOT_DEBUG("Received signal %d to close Cloud connection.", signum);
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exit(0);
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}
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