/**********************************************************************
 * forkTest.c --- a simple test of whether or not the OS automatically
 *    terminates descendants of a terminated process.
 **********************************************************************/


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


int main(void)
{
  pid_t pid;

  printf("Parent running.\n");

  if ((pid = fork()) == -1)
  {
    printf("Parent couldn't procreate.\n");
    exit(1);
  }
  else if (pid == 0)   /* The child. */
    {
      printf("Child running.\n");
      /* Sleep for 5 seconds.  This ought to be long enough for the
         parent to have terminated. */
      sleep(5);
      printf("Child still running.\n");
      printf("Child exiting.\n");
    }
  else                 /* The parent. */
  {
    printf("Child pid is %d.\n", pid);
    printf("Parent exiting.\n");
  }

  exit(0);
}