Header File 

signal.h  

Category 

Process Control Routines 

Prototype 

int raise(int sig); 

Description 

Sends a software signal to the executing program. 

raise sends a signal of type sig to the program. If the program has installed a signal handler for the signal type specified by sig, that handler will be executed. If no handler has been installed, the default action for that signal type will be taken. 

The signal types currently defined in signal.h are noted here:

On success, raise returns 0. 

On error it returns nonzero. 

Example  

#include <signal.h>
int main(void)
{
    int a, b;
    a = 10;
    b = 0;
    if (b == 0)
    /* preempt divide by zero error */
       raise(SIGFPE);
    a = a / b;
    return 0;
}

Portability