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file.go
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file.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package xos
import (
"os"
xerrors "github.com/m3db/m3/src/x/errors"
)
// File is the interface implemented by *os.File.
type File interface {
// Write bytes to the file descriptor.
Write(p []byte) (int, error)
// Sync fsyncs the file descriptor ensuring all writes have made it to disk.
Sync() error
// Close the file descriptor.
Close() error
}
// WriteFileSync calls fsync() in addition to writing a file to disk.
func WriteFileSync(name string, data []byte, perm os.FileMode) error {
f, err := os.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm) //nolint:gosec
if err != nil {
return err
}
_, err = f.Write(data)
return xerrors.FirstError(err, f.Sync(), f.Close())
}