Generator bazujący na /dev/urandom

#include <stdio.h>
#include <fcntl.h>
#define BUFF_CAP 32

int main(int argc, char** argv)
{
    int dest = open("/dev/urandom", O_RDWR);
    if (dest == -1)
    {
    perror("Wystapil blad");
    return 1;
    }

    char bytes[BUFF_CAP];
    int bRead = 0;

    bRead = read(dest, bytes, BUFF_CAP);
    int i;
    for(i = 0; i < bRead; i++)
    {
    if ((int)bytes[i] < 0)
        bytes[i] = (int)bytes[i] * -1;
    bytes[i] = bytes[i]%30 + 1;
    printf("%d ", bytes[i]);
    }
    printf("\n");
    return 0;
}