/*------------------------------------------------------------------*/
/* testforkret.c                                                    */
/* Author: Bob Dondero                                              */
/* The fork system call's return value.                             */
/*------------------------------------------------------------------*/

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

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

   printf("Parent process (%d)\n", (int)getpid());

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

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

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

   return 0;
}

/*------------------------------------------------------------------*/

/* Sample executions:

$ gcc -Wall -ansi -pedantic testforkret.c -o testforkret

$ testforkret
Parent process (14675)
Child process (14676)
Parent and child process (14676)
Parent process (14675)
Parent and child process (14675)

$ testforkret
Parent process (14678)
Child process (14679)
Parent and child process (14679)
Parent process (14678)
Parent and child process (14678)

*/