gecko/tools/reorder/rseed.c

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2012-05-21 04:12:37 -07:00
/* 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;
}