#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<netdb.h>
#include<fcntl.h>
#include<string.h>
#include <errno.h>

int main(int argc, char* argv[])
{ 
  int pfd;  // one end of pipe created by parent process
  char buffer0[256];
  char buffer1[256];

  printf("proc1 started\n");  
  pfd = atoi(argv[1]);

  read(pfd,buffer0,256);
  printf("proc1: got string %s\n",buffer0);

  printf("press enter to send response:"); getchar();

  sprintf(buffer1,"proc1's response");
  write(pfd,buffer1,strlen(buffer1)+1);

  close(pfd);
  printf("press enter to exit:"); getchar();
  exit(0);
}