Properly pass exit code from exec

jlmkr.py

@@ -223,6 +223,7 @@ def exec_jail(jail_name, cmd, args):
     """
     Execute a command in the jail with given name.
     """
+    sys.exit(
         subprocess.run(
             [
                 "systemd-run",
@@ -235,8 +236,8 @@ def exec_jail(jail_name, cmd, args):
                 "--service-type=exec",
                 cmd,
             ]
-        + args,
-        check=True,
+            + args
+        ).returncode
     )