ajohnsen@google.com
4f613457d6
BUG= R=sgjesse@google.com Review URL: https://codereview.chromium.org//209333014 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@34356 260f80e4-7a28-3924-810f-c04153c831b5
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(TARGET_OS_LINUX)
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#include <errno.h> // NOLINT
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#include <fcntl.h> // NOLINT
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#include "bin/fdutils.h"
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#include "bin/crypto.h"
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#include "platform/signal_blocker.h"
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namespace dart {
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namespace bin {
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bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) {
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ThreadSignalBlocker signal_blocker(SIGPROF);
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intptr_t fd = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
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open("/dev/urandom", O_RDONLY));
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if (fd < 0) return false;
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intptr_t bytes_read = 0;
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do {
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int res = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
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read(fd, buffer + bytes_read, count - bytes_read));
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if (res < 0) {
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int err = errno;
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VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
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errno = err;
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return false;
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}
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bytes_read += res;
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} while (bytes_read < count);
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VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
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return true;
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(TARGET_OS_LINUX)
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