43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Copyright 2016 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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//go:build windows
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// +build windows
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package fs
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import (
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"fmt"
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"os"
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"syscall"
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)
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// renameFallback attempts to determine the appropriate fallback to failed rename
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// operation depending on the resulting error.
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func renameFallback(err error, src, dst string) error {
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// Rename may fail if src and dst are on different devices; fall back to
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// copy if we detect that case. syscall.EXDEV is the common name for the
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// cross device link error which has varying output text across different
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// operating systems.
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terr, ok := err.(*os.LinkError)
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if !ok {
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return err
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}
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if terr.Err != syscall.EXDEV {
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// In windows it can drop down to an operating system call that
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// returns an operating system error with a different number and
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// message. Checking for that as a fall back.
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noerr, ok := terr.Err.(syscall.Errno)
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// 0x11 (ERROR_NOT_SAME_DEVICE) is the windows error.
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// See https://msdn.microsoft.com/en-us/library/cc231199.aspx
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if ok && noerr != 0x11 {
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return fmt.Errorf("link error: cannot rename %s to %s: %w", src, dst, terr)
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}
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}
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return renameByCopy(src, dst)
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}
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