зеркало из https://github.com/github/vitess-gh.git
40 строки
902 B
Go
40 строки
902 B
Go
// Copyright 2012, Google Inc. 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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// Package ioutil2 provides extra functionality along similar lines to io/ioutil.
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package ioutil2
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import (
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"io/ioutil"
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"os"
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"path"
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)
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// Write file to temp and atomically move when everything else succeeds.
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func WriteFileAtomic(filename string, data []byte, perm os.FileMode) error {
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dir, name := path.Split(filename)
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f, err := ioutil.TempFile(dir, name)
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if err != nil {
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return err
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}
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_, err = f.Write(data)
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if err == nil {
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err = f.Sync()
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}
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if closeErr := f.Close(); err == nil {
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err = closeErr
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}
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if permErr := os.Chmod(f.Name(), perm); err == nil {
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err = permErr
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}
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if err == nil {
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err = os.Rename(f.Name(), filename)
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}
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// Any err should result in full cleanup.
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if err != nil {
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os.Remove(f.Name())
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}
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return err
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}
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