mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
8b6de5f85d
A call file.Sync on OSX doesn't guarantee actual persistence on physical drive media as the data can be cached in physical drive's buffers. Hence calls to file.Sync need to be replaced with fcntl(F_FULLFSYNC).
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
// Copyright 2015 CoreOS, 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 ioutil
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/coreos/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
|
|
}
|