// https://www.geeksforgeeks.org/pipe-system-call/

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

#define MSGSIZE 16 


char* msg1 = "hello, world #1"; 
char* msg2 = "hello, world #2"; 
char* msg3 = "hello, world #3"; 
  
int main() { 
    char inbuf[MSGSIZE]; 
    int p[2], i; 
  
    if (pipe(p) < 0) 
        exit(1); 
 
    write(p[1], msg1, MSGSIZE); 
    write(p[1], msg2, MSGSIZE); 
    write(p[1], msg3, MSGSIZE); 
  
    for (i = 0; i < 3; i++) { 
         read(p[0], inbuf, MSGSIZE); 
         printf("%s\n", inbuf); } 
    return 0; }