From 205013c8002aacd142264e9b4560e86b0ba05830 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 26 May 2021 10:54:57 +0200
Subject: [PATCH] man: document udevadm info output prefixes

Fixes: #19663
---
 man/udevadm.xml | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/man/udevadm.xml b/man/udevadm.xml
index b731f808bc9..9f89783521f 100644
--- a/man/udevadm.xml
+++ b/man/udevadm.xml
@@ -186,6 +186,45 @@
 
         <xi:include href="standard-options.xml" xpointer="help" />
       </variablelist>
+
+      <para>The generated output shows the current device database entry in a terse format. Each line shown
+      is prefixed with one of the following characters:</para>
+
+      <table>
+        <title><command>udevadm info</command> output prefixes</title>
+        <tgroup cols='2' align='left' colsep='1' rowsep='1'>
+          <colspec colname="prefix" />
+          <colspec colname="meaning" />
+          <thead>
+            <row>
+              <entry>Prefix</entry>
+              <entry>Meaning</entry>
+            </row>
+          </thead>
+          <tbody>
+            <row>
+              <entry><literal>P:</literal></entry>
+              <entry>Device path in <filename>/sys/</filename></entry>
+            </row>
+            <row>
+              <entry><literal>N:</literal></entry>
+              <entry>Kernel device node name</entry>
+            </row>
+            <row>
+              <entry><literal>L:</literal></entry>
+              <entry>Device node symlink priority</entry>
+            </row>
+            <row>
+              <entry><literal>S:</literal></entry>
+              <entry>Device node symlink</entry>
+            </row>
+            <row>
+              <entry><literal>E:</literal></entry>
+              <entry>Device property</entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
     </refsect2>
 
     <refsect2><title>udevadm trigger
-- 
2.47.3