router7/internal/teelogger/teelogger.go
2018-06-28 20:08:23 +02:00

35 lines
1.0 KiB
Go

// Copyright 2018 Google 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.
// Package teelogger provides loggers which send their output to multiple
// writers, like the tee(1) command.
package teelogger
import (
"io"
"io/ioutil"
"log"
"os"
)
// NewConsole returns a logger which returns to /dev/console and os.Stderr.
func NewConsole() *log.Logger {
var w io.Writer
w, err := os.OpenFile("/dev/console", os.O_RDWR, 0600)
if err != nil {
w = ioutil.Discard
}
return log.New(io.MultiWriter(os.Stderr, w), "", log.LstdFlags|log.Lshortfile)
}