base/files/scoped_file.cc

   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
  15 namespace base {
  16 namespace internal {
  17
  18 #if defined(OS_POSIX)
  19
  20 // static
  21 void 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