tools/reorder/rseed.c
author Joshua Cranmer <Pidgeot18@gmail.com>
Mon, 21 Oct 2013 13:08:00 -0500
changeset 165412 fb42a764f90bc91a628e472889e00b27b28b55ed
parent 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 900526, part 2: Move backend.mk inclusion to config.mk instead of rules.mk, r=gps

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*

  A program that reads /dev/random to produce a seed for srand(3).

 */

#include <stdio.h>
#include <fcntl.h>

int
main(int argc, char *argv[])
{
    int fd, ok, seed = 0;

    fd = open("/dev/random", O_RDONLY);
    if (fd < 0) {
        perror("/dev/random");
        return 1;
    }

    ok = read(fd, &seed, sizeof seed);
    if (ok > 0)
        printf("%d\n", seed);
    else
        perror("/dev/random");

    close(fd);
    return 0;
}