Catching Signal, Self-driven with raise function

Till now, we were trying to send signals from one process to another.  Today, we will self-generate the signal within its own function using raise.

Here is the sample program.

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#include <stdio.h> #include <signal.h> void signal_catch(int signum) { printf("\tCaught the signal %d\n",signum); } void main() { signal(SIGINT,signal_catch); printf("Issuing SIGINT signal to itself\n"); raise (SIGINT); printf("Exiting\n"); }

As usual, we are registering signal function 'signal_catch' for SIGINT signal.  Using raise function, we are generating signal to its own function.

When we run the program, it is observed that signal_catch function will be executed because it caught the signal SIGINT because of 'raise'.

root@kali:~# ./a.out
Issuing SIGINT signal to itself
 Caught the signal 2
Exiting