third_pipe.c

/*****    File:  pipe.c    *****/ 
#include <stdio.h> 
#include <string.h> 
#include <sys/wait.h> 
#include<stdlib.h> 
int main(int argc, char *argv[]) 
{ int p[2]; 
  int i, pid, status; 
  char buffer[20]; 
    pipe(p);                       /* setting up the pipe   */ 
    if ((pid = fork()) == 0)        
  /* in child */ 
    {  close(p[1]);                /* child closes p[1]     */ 
       while ((i = read(p[0], buffer, 8)) != 0) 
       { buffer[i] = '\0';         /* string terminator     */ 
         printf("%d chars :%s: received by child\n", i, buffer); 
       } 

       close(p[0]);
       _exit(0);                   /* child terminates      */ 
    } 
  /* in parent */ 
     close(p[0]);
    /* parent writes p[1]    */ 
    write(p[1], "Hello there, from me?extra", sizeof("Hello there, from me?")); 
    write(p[1], "How are you? - Ercal", sizeof("How are you? - Ercal")); 


    close(p[1]);                   /* finished writing p[1] */ 
    while (wait(&status)!=pid);    /* waiting for pid       */ 
    if (status == 0)  printf("child finished\n"); 
    else printf("child failed\n"); 
    return(0); 
}