mirror of https://github.com/kubernetes/kops.git
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
//go:build !windows
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// +build !windows
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package fi
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import (
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"fmt"
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"os"
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"syscall"
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"k8s.io/klog/v2"
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)
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// EnsureFileOwner will set the owner & group for a file.
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// Empty values for owner/group will leave the owner/group unchanged.
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func EnsureFileOwner(destPath string, owner string, groupName string) (bool, error) {
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changed := false
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stat, err := os.Lstat(destPath)
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if err != nil {
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return changed, fmt.Errorf("error getting file stat for %q: %v", destPath, err)
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}
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actualUserID := int(stat.Sys().(*syscall.Stat_t).Uid)
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userID := actualUserID
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if owner != "" {
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user, err := LookupUser(owner) // user.Lookup(owner)
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if err != nil {
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return changed, fmt.Errorf("error looking up user %q: %v", owner, err)
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}
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if user == nil {
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return changed, fmt.Errorf("user %q not found", owner)
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}
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userID = user.Uid
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}
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actualGroupID := int(stat.Sys().(*syscall.Stat_t).Gid)
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groupID := actualGroupID
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if groupName != "" {
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group, err := LookupGroup(groupName)
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if err != nil {
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return changed, fmt.Errorf("error looking up group %q: %v", groupName, err)
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}
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if group == nil {
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return changed, fmt.Errorf("group %q not found", groupName)
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}
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groupID = group.Gid
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}
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if actualUserID == userID && actualGroupID == groupID {
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return changed, nil
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}
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klog.Infof("Changing file owner/group for %q to %s:%s", destPath, owner, groupName)
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err = os.Lchown(destPath, userID, groupID)
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if err != nil {
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return changed, fmt.Errorf("error setting file owner/group for %q: %v", destPath, err)
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}
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changed = true
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return changed, nil
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}
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