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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package atomicfile
import (
"os"
"golang.org/x/sys/windows"
)
func rename(srcFile, destFile string) error {
// Use replaceFile when possible to preserve the original file's attributes and ACLs.
if err := replaceFile(destFile, srcFile); err == nil || err != windows.ERROR_FILE_NOT_FOUND {
return err
}
// destFile doesn't exist. Just do a normal rename.
return os.Rename(srcFile, destFile)
}
func replaceFile(destFile, srcFile string) error {
destFile16, err := windows.UTF16PtrFromString(destFile)
if err != nil {
return err
}
srcFile16, err := windows.UTF16PtrFromString(srcFile)
if err != nil {
return err
}
return replaceFileW(destFile16, srcFile16, nil, 0, nil, nil)
}
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