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From caff38650c2c1ae9244a30b87275db3d3a5e3b5d Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 28 Apr 2015 12:12:29 +0200
Subject: [PATCH] bus-util: print correct warnings for units that fail but for
 which we have a NULL result only

Cherry-picked from: 373a99e
Related: #1016680
---
 src/libsystemd/sd-bus/bus-util.c | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/src/libsystemd/sd-bus/bus-util.c b/src/libsystemd/sd-bus/bus-util.c
index 017fbaf2a..e48abf55a 100644
--- a/src/libsystemd/sd-bus/bus-util.c
+++ b/src/libsystemd/sd-bus/bus-util.c
@@ -1724,28 +1724,34 @@ static const struct {
 };
 
 static void log_job_error_with_service_result(const char* service, const char *result) {
-        unsigned i;
         _cleanup_free_ char *service_shell_quoted = NULL;
 
         assert(service);
-        assert(result);
 
         service_shell_quoted = shell_maybe_quote(service);
 
-        for (i = 0; i < ELEMENTSOF(explanations); ++i)
-                if (streq(result, explanations[i].result))
-                        break;
+        if (!isempty(result)) {
+                unsigned i;
 
-        if (i < ELEMENTSOF(explanations))
-                log_error("Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
-                          service,
-                          explanations[i].explanation,
-                          strna(service_shell_quoted));
-        else
-                log_error("Job for %s failed. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
-                          service,
-                          strna(service_shell_quoted));
+                for (i = 0; i < ELEMENTSOF(explanations); ++i)
+                        if (streq(result, explanations[i].result))
+                                break;
+
+                if (i < ELEMENTSOF(explanations)) {
+                        log_error("Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
+                                  service,
+                                  explanations[i].explanation,
+                                  strna(service_shell_quoted));
 
+                        goto finish;
+                }
+        }
+
+        log_error("Job for %s failed. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
+                  service,
+                  strna(service_shell_quoted));
+
+finish:
         /* For some results maybe additional explanation is required */
         if (streq_ptr(result, "start-limit"))
                 log_info("To force a start use \"systemctl reset-failed %1$s\" followed by \"systemctl start %1$s\" again.",