#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define maxsize 1000
char buffer [maxsize];

//ipc-pipe-3.c

void server(int readfd,int writefd)
{
   printf ("dai il pathname: ");

   fgets (buffer, sizeof (buffer), stdin);

   write(writefd,buffer, sizeof (buffer));
   while (read(readfd,buffer,sizeof(buffer)) > 0)    
		printf("%s",buffer);
   printf("\n");
}

void client(int readfd,int writefd)
{
   FILE * fp;
   char line[1000];

   read(readfd,buffer,sizeof(buffer));
   if (strchr (buffer, '\n'))  
		*strchr(buffer, '\n') = '\0';
   fp=fopen(buffer,"r");

   while(fgets(line,sizeof(line),fp)!=NULL)
       write(writefd,line,sizeof(line));
}


int main()
{
    int pdf1[2],pdf2[2], pid, status;
    
    pipe(pdf1); pipe(pdf2);
    pid=fork();
    if(pid>0)
    {
        close(pdf1[0]); close(pdf2[1]);
	sleep(1); /* il client aspetta mentre il server legge la pipe */ 
        server(pdf2[0],pdf1[1]);
        wait(&status);
        exit(0);
    }
    else
    {
        close(pdf1[1]);  close(pdf2[0]);
        client(pdf1[0],pdf2[1]);
        exit(0);
    }
}