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 #include "build/build_config.h" 9 10 #if defined(OS_POSIX) 11 #include <unistd.h> 12 13 #include "base/posix/eintr_wrapper.h" 14 #endif 15 16 namespace base { 17 namespace internal { 18 19 #if defined(OS_POSIX) 20 21 // static 22 void ScopedFDCloseTraits::Free(int fd) { 23 // It's important to crash here. 24 // There are security implications to not closing a file descriptor 25 // properly. As file descriptors are "capabilities", keeping them open 26 // would make the current process keep access to a resource. Much of 27 // Chrome relies on being able to "drop" such access. 28 // It's especially problematic on Linux with the setuid sandbox, where 29 // a single open directory would bypass the entire security model. 30 PCHECK(0 == IGNORE_EINTR(close(fd))); 31 } 32 33 #endif // OS_POSIX 34 35 } // namespace internal 36 } // namespace base 37
