011.c

/*
..........................................................................................................................................
Name : 011.c
Author : SHRUTI VERMA
Description : Write a program to ignore a SIGINT signal then reset the default action of the SIGINT signal -
                use sigaction system call.
Date : 20 Sep 2025
..........................................................................................................................................
*/

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

void my_handler(int signal) {
    printf("Caught SIGINT : Interrupt from Keyboard\n");
}

int main() {   

    struct sigaction sa;
    sa.sa_handler = my_handler;
    sa.sa_flags = 0;
    
    printf("press Ctrl + C to exit\n");
    sigaction(SIGINT, &sa, NULL);
    pause();

    sa.sa_handler = SIG_DFL;
    

    printf("press Ctrl + C to exit again\n");
    sigaction(SIGINT, &sa, NULL);  
    pause();

    return 0; 
}

/*----------------------------------OUTPUT----------------------------------------------------------------
press Ctrl + C to exit
^CCaught SIGINT : Interrupt from Keyboard
press Ctrl + C to exit again
^C
*/