55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fsutil
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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)
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// Create a temporary file with the same semantics as ioutil.TempFile, but
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// ensure that it is unlinked before returning so that it does not persist
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// after the process exits.
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//
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// Warning: this is not production-quality code, and should only be used for
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// testing purposes. In particular, there is a race between creating and
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// unlinking by name.
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func AnonymousFile(dir string) (*os.File, error) {
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// Choose a prefix based on the binary name.
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prefix := path.Base(os.Args[0])
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// Create the file.
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f, err := ioutil.TempFile(dir, prefix)
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if err != nil {
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return nil, fmt.Errorf("TempFile: %v", err)
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}
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// Unlink it.
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if err := os.Remove(f.Name()); err != nil {
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return nil, fmt.Errorf("Remove: %v", err)
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}
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return f, nil
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}
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// Call fdatasync on the supplied file.
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//
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// REQUIRES: FdatasyncSupported is true.
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func Fdatasync(f *os.File) error {
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return fdatasync(f)
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}
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