Linux under C Programming: Signal processing

Signal processing is a feature of Linux programs. Signal processing is used to simulate the interrupt function of the operating system. To use the signal processing function, all you have to do is fill out a signal processing function.

#include <stdio.h>        
#include <sys/types.h>        
#include <stdlib.h>
#include <signal.h >

int flag = 1; 

void func (int sig) 

{
printf ("I get a signal!\n");
Flag = 0;

}

int main ()

{
    signal (SIGINT, func);
    printf ("pid:%ld\n", (long) getpid ());

    while (flag)
    pause ();
    return 0;

}

Perform

#gcc sig.c-o Sig

#./sig

at another terminal:

#kill-int 333//333 is the process number that the program prints out

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