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31 lines
563 B
Go
31 lines
563 B
Go
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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//+build !windows
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package filch
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import (
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"os"
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"syscall"
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)
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func saveStderr() (*os.File, error) {
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fd, err := syscall.Dup(stderrFD)
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if err != nil {
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return nil, err
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}
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return os.NewFile(uintptr(fd), "stderr"), nil
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}
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func unsaveStderr(f *os.File) error {
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err := dup2Stderr(f)
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f.Close()
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return err
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}
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func dup2Stderr(f *os.File) error {
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return syscall.Dup2(int(f.Fd()), stderrFD)
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}
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