/*
 * Sample program for getpid system call  - No.20
 *
 * getpid, getppid - get process identification
 *
 * Synopsis
 *     #include <sys/types.h>
 *     #include <unistd.h>
 *
 *     pid_t getpid(void);
 *     pid_t getppid(void);
 *
 * Description
 *     getpid returns the process ID of the current process.
 *     (This is often used by routines that generate unique
 *      temporary file names.)
 *
 *     getppid returns the process ID of the parent of the 
 *     current process.
 *
 * Types - <sys/types.h>
 *     typedef int pid_t;
 */

#include <stdio.h>

main()
{
	int child;

	child = fork();
	wait(NULL);
	if (child == 0) {
		printf("Child : ");
	} else {
		printf("Parent: ");
	}
	printf("my pid = %d, parent's pid = %d\n", getpid(), getppid());

	exit(0);
}