#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>



void main(void)

{ 

    pid_t pid; 

    pid = fork(); 

    if (pid>0) { 

      printf("daemon on duty!\n"); 

      exit(0); 

    } else 

    if (pid<0) { 

    printf("Can't fork!\n"); 

    exit(-1); 

    } 

    for (;;) { 

      printf("I am the daemon!\n"); 

      sleep(3); 

      /* do something your own here */ 

    } 

}