Exercice_2

//
//  main.c
//  Exercice2_Test
//
//  Created by Samir  Benjalloul on 14/10/2021.
//

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

int main(int argc, const char * argv[]) {
    int pid;
    char buffer[10];
    int pipe1[2];
    int pipe2[2];
    int s;

    if(pipe(pipe1)== -1){
        perror("erreur de pipe 1");
        exit(1);
    }
    if(pipe(pipe2) == -1){
        perror("Erreur de pipe 2");
        exit(1);
    }

    pid =fork();
    if(pid < 0){
        perror("erreur de fork");
        exit(1);
    }
    if(pid ==0){ //fils
        close(pipe1[0]);
        close(pipe2[1]);

        read(pipe2[0], buffer, 20);
        write(pipe1[1], "hello pipe1\n",20);
//        close(pipe2[1]);
        close(pipe1[1]);
        close(pipe2[0]);
        printf("message reçus de pipe 2 %s \n", buffer);
    }else {
        close(pipe1[1]);
        close(pipe2[0]);

        write(pipe2[1],"hello pipe2\n", 20);
        read(pipe1[0], buffer, 20);

        close(pipe1[0]);
        close(pipe2[1]);
        printf("message reçu de pipe 1  %s \n",buffer);
    }

    return 0;
}