50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package compositefs
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import (
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"context"
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"os"
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"tailscale.com/tailfs/tailfsimpl/shared"
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)
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// Rename implements interface webdav.FileSystem. The root of this file system
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// is read-only, so any attempt to rename a child within the root of this
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// filesystem will fail with os.ErrPermission. Renaming across children is not
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// supported and will fail with os.ErrPermission. Renaming within a child will
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// be handled by the respective child.
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func (cfs *CompositeFileSystem) Rename(ctx context.Context, oldName, newName string) error {
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if shared.IsRoot(oldName) || shared.IsRoot(newName) {
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// root directory is read-only
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return os.ErrPermission
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}
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oldPathInfo, err := cfs.pathInfoFor(oldName)
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if oldPathInfo.refersToChild {
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// children themselves are read-only
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return os.ErrPermission
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}
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if err != nil {
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return err
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}
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newPathInfo, err := cfs.pathInfoFor(newName)
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if newPathInfo.refersToChild {
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// children themselves are read-only
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return os.ErrPermission
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}
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if err != nil {
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return err
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}
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if oldPathInfo.child != newPathInfo.child {
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// moving a file across children is not permitted
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return os.ErrPermission
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}
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// file is moving within the same child, let the child handle it
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return oldPathInfo.child.FS.Rename(ctx, oldPathInfo.pathOnChild, newPathInfo.pathOnChild)
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}
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