Unix system calls 1

Unix System Calls

(fork, getpid, getppid)

---

// Unix system calls

// fork, getpid, getppid

#include<stdio.h>

#include<string.h>

#include<sys/types.h>

#include<unistd.h>

void main()

{

pid_t pid;

pid=fork();

 

  if(pid == -1)

   printf(“\n Error in creating process “);

 else if(pid == 0)

  {

  printf(“\nExecuting in child process”);

  printf(“\n child process pid=%d “, getpid());

    printf(“\n parent process pid=%d “, getppid());

   }

   else

   printf(“\nExecuting in parent process, pid=%d \n”, getppid());

}