Merge pull request #9214 from poettering/systemctl-get-processes-fix

two small fixes for systemctl's process tree display

src/core/dbus-unit.c

@@ -824,7 +824,7 @@ static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) {
         assert(p);
 
         r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, p, &f);
-        if (r == ENOENT)
+        if (r == -ENOENT)
                 return 0;
         if (r < 0)
                 return r;

src/systemctl/systemctl.c

@@ -4345,7 +4345,7 @@ static void print_status_info(
 
                         show_cgroup_and_extra(SYSTEMD_CGROUP_CONTROLLER, i->control_group, prefix, c, extra, k, get_output_flags());
                 } else if (r < 0)
-                        log_warning_errno(r, "Failed to dump process list, ignoring: %s", bus_error_message(&error, r));
+                        log_warning_errno(r, "Failed to dump process list for '%s', ignoring: %s", i->id, bus_error_message(&error, r));
         }
 
         if (i->id && arg_transport == BUS_TRANSPORT_LOCAL)