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// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/rand_util.h"
#include <fcntl.h>
#include <unistd.h>
#include "base/file_util.h"
#include "base/logging.h"
namespace base {
uint64 RandUint64() {
uint64 number;
int urandom_fd = open("/dev/urandom", O_RDONLY);
CHECK(urandom_fd >= 0);
bool success = file_util::ReadFromFD(urandom_fd,
reinterpret_cast<char*>(&number),
sizeof(number));
CHECK(success);
close(urandom_fd);
return number;
}
} // namespace base
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