зеркало из https://github.com/golang/dep.git
34 строки
979 B
Go
34 строки
979 B
Go
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package dep
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import (
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"io"
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"os"
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"syscall"
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)
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// makeUnreadable opens the file at path in exclusive mode. A file opened in
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// exclusive mode cannot be opened again until the exclusive mode file handle
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// is closed.
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func makeUnreadable(path string) (io.Closer, error) {
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if len(path) == 0 {
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return nil, syscall.ERROR_FILE_NOT_FOUND
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}
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pathp, err := syscall.UTF16PtrFromString(path)
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if err != nil {
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return nil, err
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}
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access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE)
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sharemode := uint32(0) // no sharing == exclusive mode
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sa := (*syscall.SecurityAttributes)(nil)
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createmode := uint32(syscall.OPEN_EXISTING)
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h, err := syscall.CreateFile(pathp, access, sharemode, sa, createmode, syscall.FILE_ATTRIBUTE_NORMAL, 0)
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if err != nil {
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return nil, err
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}
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return os.NewFile(uintptr(h), path), nil
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}
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