printpid.c

printpid.c

/* Copyright 2001 */
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main(void) {
    printf("%ld  %ld", (long)getpid(), (long)getppid());
    pid_t pid = fork();
    if(pid == 0)
    {
    	printf("Hello World %ld", (long)getpid());
    	execl("/bin/ls", "-a",(char *)0);
    }
    else
    	if(pid == -1)
    		printf("Failed");
    else
    	printf("HEllo Small world %ld", (long)getpid());
    return 0;
}