man: clarify udevadm monitor --tag-match/--filter-match (#5726)

--tag-match only filters tags, not properties
--tag-match only has an effect on udev events
--subsystem-match filters both event types

diff --git a/man/udevadm.xml b/man/udevadm.xml
index 1c7921f5bdd853a0ba6bc78096825dc940bc06a4..8d4fe31ec1c3a3b3060818a07a454c0b7ea81538 100644 (file)
--- a/man/udevadm.xml
+++ b/man/udevadm.xml
@@ -488,14 +488,14 @@
           <term><option>-s</option></term>
           <term><option>--subsystem-match=<replaceable>string[/string]</replaceable></option></term>
           <listitem>
-            <para>Filter events by subsystem[/devtype]. Only udev events with a matching subsystem value will pass.</para>
+            <para>Filter kernel uevents and udev events by subsystem[/devtype]. Only events with a matching subsystem value will pass.</para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term><option>-t</option></term>
           <term><option>--tag-match=<replaceable>string</replaceable></option></term>
           <listitem>
-            <para>Filter events by property. Only udev events with a given tag attached will pass.</para>
+            <para>Filter udev events by tag. Only udev events with a given tag attached will pass.</para>
           </listitem>
         </varlistentry>
         <varlistentry>