#include <stdio.h>
#include <signal.h>
#include <unistd.h>

void sig_handler(int signo)
{
    printf("in handler\n");
}

int main()
{
    signal(SIGALRM, sig_handler);
    alarm(5);
    for (size_t i = 0; i < 30; i++)
    {

        printf("i = %d, In main\n", i);
        sleep(1);
    }
    return 0;
}