#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>

#define BUFFER_SIZE     25
#define READ_END        0
#define WRITE_END       1

int main(){
    char write_msg[BUFFER_SIZE] = "Foxliver";
    char read_msg[BUFFER_SIZE];
    int fd[2];
    pid_t pid;

    pipe(fd);
    pid = fork();

    if(pid > 0){
        close(fd[READ_END]);
        write(fd[WRITE_END], write_msg, strlen(write_msg) + 1);
        close(fd[WRITE_END]);
        printf("Parent process\n");
    }else if(pid == 0){
        close(fd[WRITE_END]);

        printf("Child process\n");
        
        // pipe message read
        read(fd[READ_END], read_msg, BUFFER_SIZE);
        printf("Read : %s\n", read_msg);
        close(fd[READ_END]);
    }

    return 0;
}