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tailscale/tailfs/compositefs/stat.go

56 lines
1.4 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package compositefs
import (
"context"
"io/fs"
"tailscale.com/tailfs/shared"
)
// Stat implements webdav.FileSystem.
func (cfs *CompositeFileSystem) Stat(ctx context.Context, name string) (fs.FileInfo, error) {
if shared.IsRoot(name) {
// Root is a directory
// always use now() as the modified time to bust caches
fi := shared.ReadOnlyDirInfo(name, cfs.now())
if cfs.statChildren {
// update last modified time based on children
cfs.childrenMu.Lock()
children := cfs.children
cfs.childrenMu.Unlock()
for i, child := range children {
childInfo, err := child.FS.Stat(ctx, "/")
if err != nil {
return nil, err
}
if i == 0 || childInfo.ModTime().After(fi.ModTime()) {
fi.ModdedTime = childInfo.ModTime()
}
}
}
return fi, nil
}
pathInfo, err := cfs.pathInfoFor(name)
if err != nil {
return nil, err
}
if pathInfo.refersToChild && !cfs.statChildren {
// Return a read-only FileInfo for this child.
// Always use now() as the modified time to bust caches.
return shared.ReadOnlyDirInfo(name, cfs.now()), nil
}
fi, err := pathInfo.child.FS.Stat(ctx, pathInfo.pathOnChild)
if err != nil {
return nil, err
}
// we use the full name, which is different than what the child sees
return shared.RenamedFileInfo(ctx, name, fi), nil
}