udev(7) manpage: Fix description of $attr

[elogind.git] / udev / udev.xml

diff --git a/udev/udev.xml b/udev/udev.xml
index 20c394c28b75fd13313a5dce3c2f292277e706fd..6085dfff24e4db76170548854e068657d556147a 100644 (file)
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -75,12 +75,13 @@
       the custom rules directory <filename>/etc/udev/rules.d/</filename>
       and the temporary rules directory <filename>/dev/.udev/rules.d/</filename>.
       All rule files are sorted and processed in lexical order, regardless
-      in which of these directories they live.</para>
+      in which of these directories they live. Files in
+      <filename>/etc/udev/rules.d/</filename> have precedence over files with
+      the same name in <filename>/lib/udev/rules.d/</filename>. This can be
+      used to ignore a default rules file if needed.</para>
 
-      <para>Rule files are required to have a unique name, duplicate file names
-      are ignored. Files in <filename>/etc/udev/rules.d/</filename> have precedence
-      over files with the same name in <filename>/lib/udev/rules.d/</filename>. This
-      can be used to ignore a default rules file if needed.</para>
+      <para>Rule files must end in <filename>.rules</filename>, other extensions
+      are ignored.</para>
 
       <para>Every line in the rules file contains at least one key value pair.
       There are two kind of keys, match and assignment keys.
@@ -577,8 +578,9 @@
           <listitem>
             <para>The value of a sysfs attribute found at the device, where
             all keys of the rule have matched. If the matching device does not have
-            such an attribute, follow the chain of parent devices and use the value
-            of the first attribute that matches.
+            such an attribute, and a previous KERNELS, SUBSYSTEMS, DRIVERS, or
+            ATTRS test selected a parent device, use the attribute from that
+            parent device.
             If the attribute is a symlink, the last element of the symlink target is
             returned as the value.</para>
           </listitem>