#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h> /* memset */
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>




#define BUFSIZE 1024
#define CPC 10
#define NC 10

extern char **environ;


int main(int argc, char **argv, char **envp) {
    int p = 0, p1 = 0, f, n = 5, c, i, j,xd;
    char *b, *n1;
    c = NC;
    n1 = "//home//stud//common//tekst1.txt";

    printf("%s[%d]: Poczatek procesu glownego...\n",
        *argv, getpid());
    printf("%s", "Podaj od ktrego bitu mam zaczac czytac:\n");
    scanf("%d", xd);





    f = open(n1, O_RDONLY);
    for (i = 0; i<n; i++) {
        p = fork();






        if (p == -1)
            printf("%s[%d]: BLAD! Nie moge stworzyc procesu!\n",
                *argv, getpid());

        else if (p == 0) {
            printf("%s: Jestem procesem potomnym [%d] , moj rodzic to: [%d]...\n",
                *argv, getpid(), getppid());
            sleep(1);
            lseek(f, 20, SEEK_SET);
            b = malloc(sizeof(char)*c + 1);
            j = read(f, b, c);
            b[c + 1] = '\n';
            printf("%s: Przeczytano %d znaków, poczynajac od: %d,  z pliku %s: \"%s\"\n",
                argv[0], j, 20, n1, b);
            free(b);
            exit(0);
        }
    }

    p1 = wait(NULL);
    close(f);
    printf("%s[%d]: Koniec procesu glownego.\n",
        *argv, getpid());
    exit(0);
    return(0);
}