Współbieżne.LAB3. ZAD1

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

char buffor1[50], buffor2[50];
char nazwa_pliku[50];
int pipe_child[2], pipe_parent[2];
int childpid, n;

int main(){
    if(pipe(pipe_child) < 0)
        perror("Blad pipe_child\n");
    if(pipe(pipe_parent) < 0)
        perror("Blad pipe_parent\n");

    if((childpid = fork()) == -1){
        perror("nie moge forknac\n");
    } else {
        if(childpid == 0){
            close(pipe_child[1]);
            close(pipe_parent[0]);

            if((n = read(pipe_child[0], buffor1, sizeof(buffor1))) <= 0)
                perror("Blad odczytu\n");

            FILE *plik = fopen(buffor1, "r");

            if(plik == NULL){
                if(write(pipe_parent[1], "Blad otwarcia pliku\n", 20) != 20)
                    perror("Blad zapisu\n");
            } else {
                while(fgets(buffor1, sizeof(buffor1), plik) != NULL)
                            write(pipe_parent[1], buffor1, sizeof(buffor1));
            }

            fclose(plik);

            close(pipe_child[0]);
            close(pipe_parent[1]);
        } else {
            close(pipe_child[0]);
            close(pipe_parent[1]);

            printf("Nazwa pliku: ");
            scanf("%s", nazwa_pliku);

            if(write(pipe_child[1], nazwa_pliku, sizeof(nazwa_pliku)) != sizeof(nazwa_pliku))
                perror("Blad zapisu\n");

            while(read(pipe_parent[0], buffor2, sizeof(buffor2)) > 0)
                            write(1, buffor2, strlen(buffor2));

            wait(NULL);
            close(pipe_child[1]);
            close(pipe_parent[0]);
        }
    }

    return 0;
}