#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <wait.h>
#include <string.h>
#define DL_NAZWY 1024
#define DL_BUFORA 10


int main(){


    int pipe_server_write[2];
    int pipe_client_write[2];
    int childpid;

    if (pipe(pipe_server_write) < 0) {
        perror("Blad tworzenia PIPE serwera");
        exit(0);
    }

    if (pipe(pipe_client_write) < 0) {
        perror("Blad tworzenia PIPE klienta");
        exit(0);
    }

    if ((childpid = fork()) == -1)
    {
        perror("nie moge forknac");
        exit(1);
    }
    else
        if (childpid ==0 ) // SERWER
        {
            close(pipe_server_write[0]);
            close(pipe_client_write[1]);
            char nazwa[DL_NAZWY];
            int status=0;
            int n=read(pipe_client_write[0],nazwa,sizeof(nazwa));
            if (n<=0)
                perror("Blad read serwera");

            nazwa[n-1]='\0';
            FILE *plik=fopen(nazwa,"r");
            if(plik==NULL){
                printf("Brak pliku");
                status=-1;
                write(pipe_server_write[1],&status,sizeof(status));
            } else {
            char bufor[DL_BUFORA];
            write(pipe_server_write[1],&status,sizeof(status));
            while(fgets(bufor,sizeof(bufor),plik)!=NULL){
                write(pipe_server_write[1],bufor,sizeof(bufor));
            } }            
            close(pipe_server_write[1]);
            close(pipe_client_write[0]);        
        }
        else // KLIENT
        {
            close(pipe_server_write[1]);
            close(pipe_client_write[0]);    
            char nazwa[DL_NAZWY];
            printf("Podaj nazwe pliku\n");
            fgets (nazwa, sizeof(nazwa), stdin);
            int n=strlen(nazwa);
            if(write(pipe_client_write[1],nazwa,n)!=n)
                perror("Blad write klienta");

            char bufor[DL_BUFORA];
            int status;
            read(pipe_server_write[0],&status,sizeof(status));
            if (status==-1){
                printf("Nie moge otworzyc pliku! Prawdopodobnie podales zla nazwe!\n");

            }

            else
            {
                while (read(pipe_server_write[0],bufor,sizeof(bufor))>0)
                    write(1,bufor,strlen(bufor));                    
            }
            wait(NULL);
            close(pipe_server_write[0]);
            close(pipe_client_write[1]);
        }




    return 0;
}