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 36
