| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package io |
| |
| import "os" |
| |
| type multiWriter struct { |
| writers []Writer |
| } |
| |
| func (t *multiWriter) Write(p []byte) (n int, err os.Error) { |
| for _, w := range t.writers { |
| n, err = w.Write(p) |
| if err != nil { |
| return |
| } |
| if n != len(p) { |
| err = ErrShortWrite |
| return |
| } |
| } |
| return len(p), nil |
| } |
| |
| // MultiWriter creates a writer that duplicates its writes to all the |
| // provided writers, similar to the Unix tee(1) command. |
| func MultiWriter(writers ...Writer) Writer { |
| return &multiWriter{writers} |
| } |