Listing 4. Programs to Send and Receive SIGINT
#include <signal.h>
main ( ) {
int process_id;
printf ("Enter process_id which you want "
"to send a signal : ");
scanf ("%d", &process_id);
if (!(kill ( process_id, SIGINT)))
printf ("SIGINT sent to %d\n", process_id);
else if (errno == EPERM)
printf ("Operation not permitted.\n");
else
printf ("%d doesn't exist\n", process_id);
}
/* Listing 4a. This program will run until it
receives SIGINT */
#include <signal.h>
main ( ) {
printf (" This process id is %d. "
"Waiting for SIGINT.\n", getpid());
for (;;);
}
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