#define _POSIX_C_SOURCE 200809L

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main() {

    timer_t timerid;
    struct sigevent event = { 0 };
    struct itimerspec spec = { 0 };
    struct itimerspec current;

    event.sigev_notify = SIGEV_NONE;
    spec.it_value.tv_sec = 5;

    if ( timer_create( CLOCK_MONOTONIC, &event, &timerid ) == -1 ) {
        perror( "timer_create" );
        return EXIT_FAILURE;
    }

    if ( timer_settime( timerid, 0, &spec, NULL ) == -1 ) {
        perror( "timer_settime" );
        timer_delete( timerid );
        return EXIT_FAILURE;
    }

    if ( timer_gettime( timerid, &current ) == -1 ) {
        perror( "timer_gettime" );
        timer_delete( timerid );
        return EXIT_FAILURE;
    }

    printf( "Temps restant : %ld s\n", (long) current.it_value.tv_sec );
    timer_delete( timerid );
    return EXIT_SUCCESS;
}