psiphon-tunnel-core/vendor/github.com/spacemonkeygo/spacelog/capture_linux.go

// Copyright (C) 2014 Space Monkey, Inc.
//
// 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.

// +build !appengine

package spacelog

import (
	"syscall"
)

// CaptureOutputToFd redirects the current process' stdout and stderr file
// descriptors to the given file descriptor, using the dup3 syscall.
func CaptureOutputToFd(fd int) error {
	err := syscall.Dup3(fd, syscall.Stdout, 0)
	if err != nil {
		return err
	}
	err = syscall.Dup3(fd, syscall.Stderr, 0)
	if err != nil {
		return err
	}
	return nil
}