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helper_other.go
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/
helper_other.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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.
//go:build !aix && !windows
package file
import (
"os"
"path/filepath"
)
// SafeFileRotate safely rotates an existing file under path and replaces it with the tempfile
func SafeFileRotate(path, tempfile string) error {
if e := os.Rename(tempfile, path); e != nil {
return e
}
// best-effort fsync on parent directory. The fsync is required by some
// filesystems, so to update the parents directory metadata to actually
// contain the new file being rotated in.
return SyncParent(path)
}
// SyncParent fsyncs parent directory
func SyncParent(path string) error {
parent := filepath.Dir(path)
f, err := os.Open(parent)
//nolint:nilerr // ignore error
if err != nil {
return nil
}
defer f.Close()
return f.Sync()
}