1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/files/scoped_file.h"
6
7#include "base/logging.h"
8
9#if defined(OS_POSIX)
10#include <unistd.h>
11
12#include "base/posix/eintr_wrapper.h"
13#endif
14
15namespace base {
16namespace internal {
17
18#if defined(OS_POSIX)
19
20// static
21void ScopedFDCloseTraits::Free(int fd) {
22  // It's important to crash here.
23  // There are security implications to not closing a file descriptor
24  // properly. As file descriptors are "capabilities", keeping them open
25  // would make the current process keep access to a resource. Much of
26  // Chrome relies on being able to "drop" such access.
27  // It's especially problematic on Linux with the setuid sandbox, where
28  // a single open directory would bypass the entire security model.
29  PCHECK(0 == IGNORE_EINTR(close(fd)));
30}
31
32#endif  // OS_POSIX
33
34}  // namespace internal
35}  // namespace base
36