46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/files/scoped_file.h"
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#include "base/logging.h"
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#include "build/build_config.h"
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#if defined(OS_POSIX)
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#include <errno.h>
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#include <unistd.h>
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#include "base/debug/alias.h"
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#include "base/posix/eintr_wrapper.h"
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#endif
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namespace base {
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namespace internal {
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#if defined(OS_POSIX)
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// static
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void ScopedFDCloseTraits::Free(int fd) {
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// It's important to crash here.
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// There are security implications to not closing a file descriptor
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// properly. As file descriptors are "capabilities", keeping them open
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// would make the current process keep access to a resource. Much of
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// Chrome relies on being able to "drop" such access.
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// It's especially problematic on Linux with the setuid sandbox, where
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// a single open directory would bypass the entire security model.
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int ret = IGNORE_EINTR(close(fd));
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// TODO(davidben): Remove this once it's been determined whether
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// https://crbug.com/603354 is caused by EBADF or a network filesystem
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// returning some other error.
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int close_errno = errno;
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base::debug::Alias(&close_errno);
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PCHECK(0 == ret);
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}
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#endif // OS_POSIX
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} // namespace internal
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} // namespace base
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