C program to allow the parent process to wait for a specific child process
termination.

Source Code:

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<unistd.h>

void main()
{
 int pid1,pid2,status;
 pid1=fork();
 if(pid1==0)
 {
  sleep(5);
  printf("Hello i am child1\n");
 }
 else
 {
  pid2=fork();
  if(pid2==0)
  {
   sleep(10);
   printf("\nChild 2");
  }
  else
  {
   waitpid(pid1,&status,0);
  printf("Parent process started");
  }
  
 }
}