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

void alarm_sig(int sig)
{
    int rt;

    puts("in alarm_sig");
    if ((rt = unlink("/doesnt/exist")) == -1) {
        perror("unlink failed");
    }
}

int main()
{
    int rt;

    signal(SIGALRM, alarm_sig);
    alarm(2);
    rt = system("sleep 4");
    printf("return value from system %d\n", rt);

}