shared/install: refuse template files for non-templateable units

$ systemctl --root=/ enable templated@bar.mount
Unit type mount cannot be templated.
Failed to enable: Invalid argument.

diff --git a/src/shared/install.c b/src/shared/install.c
index f89e2c6..f02d815 100644 (file)
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -1050,6 +1050,8 @@ static int unit_file_load(
                 {}
         };
 
+        const char *name;
+        UnitType type;
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_close_ int fd = -1;
         struct stat st;
@@ -1059,6 +1061,12 @@ static int unit_file_load(
         assert(info);
         assert(path);
 
+        name = basename(path);
+        type = unit_name_to_type(name);
+        if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE|UNIT_NAME_INSTANCE) &&
+            !unit_type_may_template(type))
+                return log_error_errno(EINVAL, "Unit type %s cannot be templated.", unit_type_to_string(type));
+
         if (!(flags & SEARCH_LOAD)) {
                 r = lstat(path, &st);
                 if (r < 0)