1 /**

     2  *     $Id: urandom.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $

     3  * $Source: /development/c/demos/urandom.c,v $

     4  *

     5  */

     6 

     7 #include <stdio.h>

     8 #include <stdlib.h>

     9 #include <fcntl.h>

    10 #include <unistd.h>

    11 

    12 int compare (unsigned char *a, unsigned char *b)

    13 {

    14     if (*a > *b)

    15         return 1;

    16     return -1;

    17 }

    18 

    19 int main (int argc, char **argv)

    20 {

    21     int i;

    22     int elements;

    23     int fd;

    24     unsigned char numbers[256] = { 0 };

    25 

    26     fd = open ("/dev/urandom", O_RDONLY);

    27     if (fd == -1)

    28         return EXIT_FAILURE;

    29 

    30     elements = read (fd, numbers, 255);

    31     numbers[elements] = 0;

    32 

    33     qsort (numbers, elements, sizeof (unsigned char), (void *)&compare);

    34 

    35     for (i = 0; i < elements; i++) {

    36         printf ("Number: %d\n", numbers[i]);

    37     }

    38 

    39     close (fd);

    40     return EXIT_SUCCESS;

    41 }