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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