1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <stdlib.h>
   4 #include <signal.h>
   5 #include <sys/types.h>
   6 
   7 /* signal handler */
   8 void int_handler(int sig)
   9 {
  10     int mypid = getpid();
  11     printf("[%i] Ouch - shot in the ...\n", mypid);
  12     printf("[%i] exit\n", mypid);
  13     exit(2);
  14 }
  15 
  16 int main(int argc, char *argv[])
  17 {
  18     pid_t pid;
  19     
  20     pid = fork();
  21     if (pid < 0)  {
  22         fprintf(stderr, "fork failed\n");
  23         exit(1);
  24     } 
  25     
  26     if (pid == 0)  {         // child
  27         int mypid = getpid();
  28         signal(SIGINT, int_handler);
  29         while (1) {
  30             usleep(50000);
  31             printf("[%i] Running amok!!!\n", mypid);
  32         }
  33     }
  34     else {                     // parent
  35         int mypid = getpid();
  36         int i;
  37         for(i=0; i<3; i++) {
  38             printf("[%i] is gonna kill you ...\n", mypid);
  39             sleep(1);
  40         }
  41         printf("[%i] is shooting (SIGINT) !!!\n", mypid);
  42         kill(pid, SIGINT);
  43         printf("[%i] exit\n", mypid);
  44     }
  45     exit(0);
  46 }