adce6fa473
This adds support for syncing ownership on Unixes and on Windows. The scanner always picks up ownership information, but it is not applied unless the new folder option "Sync Ownership" is set. Ownership data is stored in a new FileInfo field called "platform data". This is intended to hold further platform-specific data in the future (specifically, extended attributes), which is why the whole design is a bit overkill for just ownership.
56 lines
1.6 KiB
Go
56 lines
1.6 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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"os/user"
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"strconv"
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"github.com/syncthing/syncthing/lib/protocol"
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)
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// unixPlatformData is used on all platforms, because apart from being the
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// implementation for BasicFilesystem on Unixes it's also the implementation
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// in fakeFS.
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func unixPlatformData(fs Filesystem, name string) (protocol.PlatformData, error) {
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stat, err := fs.Lstat(name)
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if err != nil {
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return protocol.PlatformData{}, err
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}
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ownerUID := stat.Owner()
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ownerName := ""
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if u, err := user.LookupId(strconv.Itoa(ownerUID)); err == nil && u.Username != "" {
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ownerName = u.Username
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} else if ownerUID == 0 {
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// We couldn't look up a name, but UID zero should be "root". This
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// fixup works around the (unlikely) situation where the ownership
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// is 0:0 but we can't look up a name for either uid zero or gid
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// zero. If that were the case we'd return a zero PlatformData which
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// wouldn't get serialized over the wire and the other side would
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// assume a lack of ownership info...
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ownerName = "root"
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}
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groupID := stat.Group()
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groupName := ""
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if g, err := user.LookupGroupId(strconv.Itoa(groupID)); err == nil && g.Name != "" {
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groupName = g.Name
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} else if groupID == 0 {
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groupName = "root"
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}
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return protocol.PlatformData{
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Unix: &protocol.UnixData{
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OwnerName: ownerName,
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GroupName: groupName,
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UID: ownerUID,
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GID: groupID,
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},
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}, nil
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}
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