66 lines
1.6 KiB
Go
66 lines
1.6 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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"io/fs"
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"os"
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"github.com/tailscale/xnet/webdav"
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"tailscale.com/tailfs/tailfsimpl/shared"
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)
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// OpenFile implements interface webdav.Filesystem.
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func (cfs *CompositeFileSystem) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
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if !shared.IsRoot(name) {
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pathInfo, err := cfs.pathInfoFor(name)
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if err != nil {
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return nil, err
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}
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if pathInfo.refersToChild {
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// this is the child itself, ask it to open its root
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return pathInfo.child.FS.OpenFile(ctx, "/", flag, perm)
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}
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return pathInfo.child.FS.OpenFile(ctx, pathInfo.pathOnChild, flag, perm)
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}
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// the root directory contains one directory for each child
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di, err := cfs.Stat(ctx, name)
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if err != nil {
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return nil, err
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}
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return &shared.DirFile{
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Info: di,
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LoadChildren: func() ([]fs.FileInfo, error) {
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cfs.childrenMu.Lock()
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children := cfs.children
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cfs.childrenMu.Unlock()
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childInfos := make([]fs.FileInfo, 0, len(cfs.children))
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for _, c := range children {
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if c.isAvailable() {
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var childInfo fs.FileInfo
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if cfs.statChildren {
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fi, err := c.FS.Stat(ctx, "/")
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if err != nil {
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return nil, err
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}
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// we use the full name
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childInfo = shared.RenamedFileInfo(ctx, c.Name, fi)
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} else {
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// always use now() as the modified time to bust caches
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childInfo = shared.ReadOnlyDirInfo(c.Name, cfs.now())
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}
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childInfos = append(childInfos, childInfo)
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}
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}
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return childInfos, nil
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},
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}, nil
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}
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