C PROGRAM TO IMPLEMENT FORK SYSTEM CALL (WITH ALGORITHM)

C PROGRAM TO IMPLEMENT FORK SYSTEM CALL (WITH ALGORITHM)

AIM : TO IMPLEMENT FORK SYSTEM CALL

ALGORITHM :

STEP 1 : START

STEP 2 : CREATE A CHILD PROCESS USING FORK

STEP 3 : IF THE PROCESSID EQUALS 0 GOTO STEP 4 ELSE GOTO STEP5

STEP 4 : IT IS A CHILD PROCESS AND GET ITS ID AND PARENT PROCESSID

STEP 5 : IF PROCESSID>0 IT IS A PARENT PROCESS AND GET ITS ID

STEP 6 : HANDLE THE SYSTEM INTERRUPT(ERROR)

STEP 7 : STOP


PROGRAM :

#include<stdio.h>
void main()
{
   int pid;
   pid=fork();
   if(pid==0)
   {
        printf("\n child process ");
        printf("\n pid of child process : %d \n pid of parent process : %d\n",getpid(),getppid());
   }
   else if(pid>0)
       printf("\n parent process : %d",getpid());
   else
       printf("\n error");
}


OUTPUT :

parent process : 3248
child process
pid of child process : 3249
pid of parent process : 1