/*-------------------------------------------------------------------*/
/* testforkret.c                                                     */
/* The fork system call's return value.                              */
/*-------------------------------------------------------------------*/

#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
   int iPid;

   printf("Parent process (%ld)\n", (long)getpid());

   fflush(NULL);
   iPid = fork();
   if (iPid == -1) {perror(argv[0]); return 1; }

   if (iPid == 0)
   {
      /* This code is executed by only the child process. */
      printf("Child process (%ld)\n", (long)getpid());
   }
   else
   {
      /* This code is executed by only the parent process. */
      printf("Parent process (%ld)\n", (long)getpid());
   }

   /* This code is executed by both the parent and child processes. */
   printf("Parent and child process (%ld)\n", (long)getpid());

   return 0;
}

/* Sample executions:

$ gcc -Wall -ansi -pedantic -o testforkret testforkret.c
$ testforkret
Parent process (29215)
Child process (29216)
Parent and child process (29216)
Parent process (29215)
Parent and child process (29215)
$ testforkret
Parent process (29217)
Child process (29218)
Parent and child process (29218)
Parent process (29217)
Parent and child process (29217)
$

*/