SSSDUtils: config file ownership should match service user

sssd_test_framework/utils/sssd.py

@@ -4,6 +4,7 @@
 
 import configparser
 from io import StringIO
+import re
 from typing import TYPE_CHECKING, Literal
 
 from pytest_mh import MultihostHost, MultihostRole, MultihostUtility
@@ -406,7 +407,12 @@ def config_apply(self, check_config: bool = True, debug_level: str | None = "0xf
         :type debug_level:  str | None, optional
         """
         cfg = self.__set_debug_level(debug_level)
-        service_user = self.config.get("sssd", "user", fallback="root")
+        if self.fs.exists("/etc/systemd/system/multi-user.target.wants/sssd.service"):
+            service_file = self.fs.read("/etc/systemd/system/multi-user.target.wants/sssd.service")
+            if re.search(r"User= *sssd", service_file):
+                service_user = "sssd"
+            else:
+                service_user = "root"
         contents = self.__config_dumps(cfg)
         self.fs.write("/etc/sssd/sssd.conf", contents, mode="0600", user=service_user, group=service_user)