mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 08:16:09 +03:00
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
|
// Copyright 2014 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/files/scoped_file.h"
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
#include "build/build_config.h"
|
||
|
|
|
||
|
|
#if defined(OS_POSIX) || defined(OS_FUCHSIA)
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include "base/posix/eintr_wrapper.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
namespace internal {
|
||
|
|
|
||
|
|
#if defined(OS_POSIX) || defined(OS_FUCHSIA)
|
||
|
|
|
||
|
|
// static
|
||
|
|
void ScopedFDCloseTraits::Free(int fd) {
|
||
|
|
// It's important to crash here.
|
||
|
|
// There are security implications to not closing a file descriptor
|
||
|
|
// properly. As file descriptors are "capabilities", keeping them open
|
||
|
|
// would make the current process keep access to a resource. Much of
|
||
|
|
// Chrome relies on being able to "drop" such access.
|
||
|
|
// It's especially problematic on Linux with the setuid sandbox, where
|
||
|
|
// a single open directory would bypass the entire security model.
|
||
|
|
int ret = IGNORE_EINTR(close(fd));
|
||
|
|
|
||
|
|
#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_FUCHSIA) || \
|
||
|
|
defined(OS_ANDROID)
|
||
|
|
// NB: Some file descriptors can return errors from close() e.g. network
|
||
|
|
// filesystems such as NFS and Linux input devices. On Linux, macOS, and
|
||
|
|
// Fuchsia's POSIX layer, errors from close other than EBADF do not indicate
|
||
|
|
// failure to actually close the fd.
|
||
|
|
if (ret != 0 && errno != EBADF)
|
||
|
|
ret = 0;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
PCHECK(0 == ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // OS_POSIX || OS_FUCHSIA
|
||
|
|
|
||
|
|
} // namespace internal
|
||
|
|
} // namespace base
|