man: document systemd-sysctl arguments

man/systemd-sysctl.service.xml

@@ -19,7 +19,8 @@
   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
-<refentry id="systemd-sysctl.service">
+<refentry id="systemd-sysctl.service"
+    xmlns:xi="http://www.w3.org/2001/XInclude">
 
   <refentryinfo>
     <title>systemd-sysctl.service</title>
@@ -47,8 +48,12 @@
   </refnamediv>
 
   <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>/usr/lib/systemd/systemd-sysctl</command>
+      <arg choice="opt" rep="repeat">OPTIONS</arg>
+      <arg choice="opt" rep="repeat"><replaceable>CONFIGFILE</replaceable></arg>
+    </cmdsynopsis>
     <para><filename>systemd-sysctl.service</filename></para>
-    <para><filename>/usr/lib/systemd/systemd-sysctl</filename></para>
   </refsynopsisdiv>
 
   <refsect1>
@@ -59,11 +64,33 @@
     <citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
     kernel parameters.</para>
 
+    <para>If invoked with no arguments, it applies all directives from
+    all configuration files in
+    <citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+    are searched for a matching file. If one or more filenames are passed on
+    the command line, only the directives in these files are applied.
+    </para>
+
     <para>See
     <citerefentry project='man-pages'><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
     for information about the configuration of this service.</para>
   </refsect1>
 
+  <refsect1><title>Options</title>
+    <variablelist>
+      <varlistentry id='path'>
+        <term><option>--path=</option></term>
+        <listitem>
+          <para>Only apply rules with the specified prefix.</para>
+        </listitem>
+      </varlistentry>
+
+      <xi:include href="standard-options.xml" xpointer="help" />
+      <xi:include href="standard-options.xml" xpointer="version" />
+
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>See Also</title>
     <para>