72 lines
2.4 KiB
Go
72 lines
2.4 KiB
Go
// Copyright (C) 2022 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package fs
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import (
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"fmt"
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"github.com/syncthing/syncthing/lib/protocol"
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"golang.org/x/sys/windows"
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)
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func (f *BasicFilesystem) PlatformData(name string, scanOwnership, _ bool, _ XattrFilter) (protocol.PlatformData, error) {
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if !scanOwnership {
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// That's the only thing we do, currently
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return protocol.PlatformData{}, nil
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}
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rootedName, err := f.rooted(name)
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if err != nil {
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return protocol.PlatformData{}, fmt.Errorf("rooted for %s: %w", name, err)
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}
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hdl, err := openReadOnlyWithBackupSemantics(rootedName)
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if err != nil {
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return protocol.PlatformData{}, fmt.Errorf("open %s: %w", rootedName, err)
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}
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defer windows.Close(hdl)
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// GetSecurityInfo returns an owner SID.
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sd, err := windows.GetSecurityInfo(hdl, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION)
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if err != nil {
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return protocol.PlatformData{}, fmt.Errorf("get security info for %s: %w", rootedName, err)
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}
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owner, _, err := sd.Owner()
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if err != nil {
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return protocol.PlatformData{}, fmt.Errorf("get owner for %s: %w", rootedName, err)
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}
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pd := &protocol.WindowsData{}
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if us := f.userCache.lookup(owner.String()); us != nil {
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pd.OwnerName = us.Username
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} else if gr := f.groupCache.lookup(owner.String()); gr != nil {
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pd.OwnerName = gr.Name
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pd.OwnerIsGroup = true
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} else {
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l.Debugf("Failed to resolve owner for %s: %v", rootedName, err)
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}
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return protocol.PlatformData{Windows: pd}, nil
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}
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func openReadOnlyWithBackupSemantics(path string) (fd windows.Handle, err error) {
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// This is windows.Open but simplified to read-only only, and adding
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// FILE_FLAG_BACKUP_SEMANTICS which is required to open directories.
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if len(path) == 0 {
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return windows.InvalidHandle, windows.ERROR_FILE_NOT_FOUND
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}
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pathp, err := windows.UTF16PtrFromString(path)
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if err != nil {
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return windows.InvalidHandle, err
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}
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var access uint32 = windows.GENERIC_READ
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var sharemode uint32 = windows.FILE_SHARE_READ | windows.FILE_SHARE_WRITE
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var sa *windows.SecurityAttributes
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var createmode uint32 = windows.OPEN_EXISTING
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var attrs uint32 = windows.FILE_ATTRIBUTE_READONLY | windows.FILE_FLAG_BACKUP_SEMANTICS
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return windows.CreateFile(pathp, access, sharemode, sa, createmode, attrs, 0)
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}
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