crashpad/util/posix/close_stdio.h
Mark Mentovai 6278690abe Update copyright boilerplate, 2022 edition (Crashpad)
sed -i '' -E -e 's/Copyright (.+) The Crashpad Authors\. All rights reserved\.$/Copyright \1 The Crashpad Authors/' $(git grep -El 'Copyright (.+) The Crashpad Authors\. All rights reserved\.$')

Bug: chromium:1098010
Change-Id: I8d6138469ddbe3d281a5d83f64cf918ec2491611
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3878262
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2022-09-06 23:54:07 +00:00

43 lines
1.8 KiB
C++

// Copyright 2014 The Crashpad Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CRASHPAD_UTIL_POSIX_CLOSE_STDIO_H_
#define CRASHPAD_UTIL_POSIX_CLOSE_STDIO_H_
namespace crashpad {
//! \brief Closes `stdin` and `stdout` by opening `/dev/null` over them.
//!
//! It is normally inadvisable to `close()` the three standard input/output
//! streams, because they occupy special file descriptors. Closing them outright
//! could result in their file descriptors being reused. This causes problems
//! for library code (including the standard library) that expects these file
//! descriptors to have special meaning.
//!
//! This function discards the standard input and standard output streams by
//! opening `/dev/null` and assigning it to their file descriptors, closing
//! whatever had been at those file descriptors previously.
//!
//! `stderr`, the standard error stream, is not closed. It is often useful to
//! retain the ability to send diagnostic messages to the standard error stream.
//!
//! \note This function can only maintain its guarantees in a single-threaded
//! process, or in situations where the caller has control of all threads in
//! the process.
void CloseStdinAndStdout();
} // namespace crashpad
#endif // CRASHPAD_UTIL_POSIX_CLOSE_STDIO_H_