33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
|
// Copyright (c) 2022 Slack Technologies, Inc.
|
||
|
|
// Use of this source code is governed by the MIT license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "shell/app/uv_stdio_fix.h"
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <cstdio>
|
||
|
|
|
||
|
|
// Copied from //base/ignore_result.h to avoid taking a dependency on //base on
|
||
|
|
// macOS.
|
||
|
|
template <typename T>
|
||
|
|
inline void ignore_result(const T&) {}
|
||
|
|
|
||
|
|
void FixStdioStreams() {
|
||
|
|
// libuv may mark stdin/stdout/stderr as close-on-exec, which interferes
|
||
|
|
// with chromium's subprocess spawning. As a workaround, we detect if these
|
||
|
|
// streams are closed on startup, and reopen them as /dev/null if necessary.
|
||
|
|
// Otherwise, an unrelated file descriptor will be assigned as stdout/stderr
|
||
|
|
// which may cause various errors when attempting to write to them.
|
||
|
|
//
|
||
|
|
// For details see https://github.com/libuv/libuv/issues/2062
|
||
|
|
struct stat st;
|
||
|
|
if (fstat(STDIN_FILENO, &st) < 0 && errno == EBADF)
|
||
|
|
ignore_result(freopen("/dev/null", "r", stdin));
|
||
|
|
if (fstat(STDOUT_FILENO, &st) < 0 && errno == EBADF)
|
||
|
|
ignore_result(freopen("/dev/null", "w", stdout));
|
||
|
|
if (fstat(STDERR_FILENO, &st) < 0 && errno == EBADF)
|
||
|
|
ignore_result(freopen("/dev/null", "w", stderr));
|
||
|
|
}
|