From b7a4d8de9273fab20e1e32e4846b6a866884e07a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Thu, 25 Dec 2014 11:12:54 -0500
Subject: [PATCH] man: add a note why %U,%h,%s are mostly useless

The reasons were already given in the description of %U, but the
are easy to overlook, and it's better to be explicit to avoid
confusion.
---
 man/systemd.unit.xml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 2e298ca04..1afa600a0 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -1556,6 +1556,16 @@
                     </tbody>
                   </tgroup>
                 </table>
+
+		<para>Please note that specifiers
+		<literal>%U</literal>, <literal>%h</literal>,
+		<literal>%s</literal> are mostly useless when systemd
+		is running in system mode.  PID 1 cannot query the
+		user account database for information, so the
+		specifiers only work as shortcuts for things which are
+		already specified in a different way in the unit
+		file. They are fully functional when systemd is
+		running in <option>--user</option> mode.</para>
         </refsect1>
 
         <refsect1>
-- 
2.30.2