mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-28 03:18:41 +00:00
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is ``rseed''
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corp. Portions created by the Initial Developer are
|
|
* Copyright (C) 2001 the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Chris Waterson <waterson@netscape.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/*
|
|
|
|
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;
|
|
}
|