mirror of https://github.com/k3s-io/k3s
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
|
// Copyright 2015 The etcd Authors
|
||
|
|
//
|
||
|
|
// 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 ioutil
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"go.etcd.io/etcd/pkg/fileutil"
|
||
|
|
)
|
||
|
|
|
||
|
|
// WriteAndSyncFile behaves just like ioutil.WriteFile in the standard library,
|
||
|
|
// but calls Sync before closing the file. WriteAndSyncFile guarantees the data
|
||
|
|
// is synced if there is no error returned.
|
||
|
|
func WriteAndSyncFile(filename string, data []byte, perm os.FileMode) error {
|
||
|
|
f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
n, err := f.Write(data)
|
||
|
|
if err == nil && n < len(data) {
|
||
|
|
err = io.ErrShortWrite
|
||
|
|
}
|
||
|
|
if err == nil {
|
||
|
|
err = fileutil.Fsync(f)
|
||
|
|
}
|
||
|
|
if err1 := f.Close(); err == nil {
|
||
|
|
err = err1
|
||
|
|
}
|
||
|
|
return err
|
||
|
|
}
|