Merge pull request #102604 from vinayakankugoyal/kubeadm-files2

Add utils to set file/directory owners and permissions.

cmd/kubeadm/app/util/users/users_linux.go

@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path/filepath"
 	"sort"
 	"strconv"
 	"strings"
@@ -629,3 +630,21 @@ func writeFile(f *os.File, str string) error {
 	}
 	return nil
 }
+
+// UpdatePathOwnerAndPermissions updates the owner and permissions of the given path.
+// If the path is a directory it updates its contents recursively.
+func UpdatePathOwnerAndPermissions(dirPath string, uid, gid int64, perms uint32) error {
+	err := filepath.WalkDir(dirPath, func(path string, d os.DirEntry, err error) error {
+		if err := os.Chown(path, int(uid), int(gid)); err != nil {
+			return errors.Wrapf(err, "failed to update owner of %q to uid: %d and gid: %d", path, uid, gid)
+		}
+
+		fm := os.FileMode(perms)
+		if err := os.Chmod(path, fm); err != nil {
+			return errors.Wrapf(err, "failed to update permissions of %q to %s", path, fm.String())
+		}
+		return nil
+	})
+
+	return err
+}

cmd/kubeadm/app/util/users/users_other.go

@@ -43,3 +43,8 @@ func AddUsersAndGroups() (*UsersAndGroups, error) {
 func RemoveUsersAndGroups() error {
 	return nil
 }
+
+// UpdatePathOwnerAndPermissions is a NO-OP on non-Linux.
+func UpdatePathOwnerAndPermissions(path string, uid, gid int64, perms uint32) error {
+	return nil
+}