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// Standard C
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
// System
#include <unistd.h>
// Mosquitto
#include <mosquitto.h>
// Project
#include "config.h"
#include "mqtt.h"
#ifndef UNUSED
# define UNUSED(x) (void) (x)
#endif
static volatile bool terminate; // NOLINT
static void
signal_handler(int signal)
{
if ( signal == SIGINT ) {
terminate = true;
}
}
static void
cleanup_app(void)
{
mosquitto_lib_cleanup();
}
static void
init_app(void)
{
terminate = false;
(void) signal(SIGINT, signal_handler);
mosquitto_lib_init();
(void) atexit(cleanup_app);
}
static void
callback(struct mosquitto *client, void *userdata, const struct mosquitto_message *message)
{
UNUSED(client);
UNUSED(userdata);
printf("message '%.*s' for topic '%s'\n",
message->payloadlen, (const char *) message->payload,
message->topic);
}
int
main(void)
{
init_app();
struct mosquitto *client = mqtt_connect(
CLIENTID,
USERNAME,
PASSWORD,
HOSTNAME,
PORT,
NULL);
if ( !client ) {
return EXIT_FAILURE;
}
mqtt_run(client,
(const char *[]){ TOPIC, "testtopic", NULL },
callback,
&terminate);
mqtt_shutdown(client);
return EXIT_SUCCESS;
}
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