Docs: udev.xml: Clarify PROGRAM key

[elogind.git] / udev / udev.xml

diff --git a/udev/udev.xml b/udev/udev.xml
index 8224311221e1088242e56d5ccf65ff32634ddb0f..c9083446edfed21f1e59acad599cfed228a12b77 100644 (file)
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -128,8 +128,7 @@
         <varlistentry>
           <term><option>:=</option></term>
           <listitem>
-            <para>Assign  a  value  to  a key finally; disallow any later changes,
-            which may be used to prevent changes by any later rules.</para>
+            <para>Assign  a  value  to  a key finally; disallow any later changes.</para>
           </listitem>
         </varlistentry>
       </variablelist>
@@ -189,7 +188,7 @@
         <varlistentry>
           <term><option>DRIVER</option></term>
           <listitem>
-            <para>Match the driver name of the event device. Only set for devices
+            <para>Match the driver name of the event device. Only set this key for devices
             which are bound to a driver at the time the event is generated.</para>
           </listitem>
         </varlistentry>
@@ -197,8 +196,8 @@
           <term><option>ATTR{<replaceable>filename</replaceable>}</option></term>
           <listitem>
             <para>Match sysfs attribute values of the event device. Trailing
-            whitespace in the attribute values is ignored, if the specified match
-            value does not contain trailing whitespace itself.
+            whitespace in the attribute values is ignored unless the specified match
+            value itself contains trailing whitespace.
             </para>
           </listitem>
         </varlistentry>
@@ -229,8 +228,8 @@
           <listitem>
             <para>Search the devpath upwards for a device with matching sysfs attribute values.
             If multiple <option>ATTRS</option> matches are specified, all of them
-            must match on the same device. Trailing whitespace in the attribute values is ignored,
-            if the specified match value does not contain trailing whitespace itself.</para>
+            must match on the same device. Trailing whitespace in the attribute values is ignored
+            unless the specified match value itself contains trailing whitespace.</para>
           </listitem>
         </varlistentry>
 
@@ -259,10 +258,11 @@
         <varlistentry>
           <term><option>PROGRAM</option></term>
           <listitem>
-            <para>Execute a program. The key is true, if the program returns
+            <para>Execute a program to determine whether there
+            is a match; the key is true if the program returns
             successfully. The device properties are made available to the
-            executed program in the environment. The program's output printed to
-            stdout, is available in the RESULT key.</para>
+            executed program in the environment. The program's stdout
+            is available in the RESULT key.</para>
           </listitem>
         </varlistentry>