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From 9b33863a2cfa31bbe57bab685776b64731f528f1 Mon Sep 17 00:00:00 2001
From: Lukas Nykryn <lnykryn@redhat.com>
Date: Wed, 30 Mar 2016 13:49:50 +0200
Subject: [PATCH] core: improve error message when starting template without
 instance

Cherry-picked from: 5d512d54429aa9d2f4a0ca215bb2e982db720d6b
Resolves: #1142369
---
 src/core/manager.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/manager.c b/src/core/manager.c
index bde17ce0be..bb5050303c 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -1328,8 +1328,12 @@ int manager_load_unit_prepare(
 
         t = unit_name_to_type(name);
 
-        if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
+        if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
+                if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
+                        return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is missing the instance name.", name);
+
                 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
+        }
 
         ret = manager_get_unit(m, name);
         if (ret) {