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- // Copyright 2015 Google Inc. All Rights Reserved.
- //
- // 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 fsutil
- import (
- "fmt"
- "io/ioutil"
- "os"
- "path"
- )
- // Create a temporary file with the same semantics as ioutil.TempFile, but
- // ensure that it is unlinked before returning so that it does not persist
- // after the process exits.
- //
- // Warning: this is not production-quality code, and should only be used for
- // testing purposes. In particular, there is a race between creating and
- // unlinking by name.
- func AnonymousFile(dir string) (f *os.File, err error) {
- // Choose a prefix based on the binary name.
- prefix := path.Base(os.Args[0])
- // Create the file.
- f, err = ioutil.TempFile(dir, prefix)
- if err != nil {
- err = fmt.Errorf("TempFile: %v", err)
- return
- }
- // Unlink it.
- err = os.Remove(f.Name())
- if err != nil {
- err = fmt.Errorf("Remove: %v", err)
- return
- }
- return
- }
- // Call fdatasync on the supplied file.
- //
- // REQUIRES: FdatasyncSupported is true.
- func Fdatasync(f *os.File) error {
- return fdatasync(f)
- }
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