System_Software_HandsOnList2/008e.c at main · superv13/System_Software_HandsOnList2 · GitHub

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/*
..........................................................................................................................................
Name : 008.c
Author : SHRUTI VERMA
Description : Write a separate program using signal system call to catch the following signals.
                a. SIGSEGV
                b. SIGINT
                c. SIGFPE
                d. SIGALRM (use alarm system call)
                e. SIGALRM (use setitimer system call)
                f. SIGVTALRM (use setitimer system call)
                g. SIGPROF (use setitimer system call)
Date : 20 Sep 2025
..........................................................................................................................................
*/

#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<signal.h>
#include<sys/time.h>

void my_handler(int signal) {
    if(signal == SIGALRM)
    printf("Caught SIGALRM : Timer Expired\n");
    exit(1);
}

int main() {
    signal(SIGALRM, my_handler);
    struct itimerval timer;
    timer.it_value.tv_sec = 0;
    timer.it_value.tv_usec = 1;

    timer.it_interval.tv_sec = 0;
    timer.it_interval.tv_usec = 10;

    setitimer(ITIMER_REAL, &timer, NULL);

    return 0;
}

/*----------------------------------OUTPUT----------------------------------------------------------------
Caught SIGALRM : Timer Expired
*/