Merge pull request #11827 from keszybz/pkgconfig-variables

[thirdparty/systemd.git] / man / udev_device_has_tag.xml

diff --git a/man/udev_device_has_tag.xml b/man/udev_device_has_tag.xml
index 9bf0077c6199aea5889b054eb605ee80cd7e1825..e27b770215720f9771d64e31b957951a3aae530b 100644 (file)
--- a/man/udev_device_has_tag.xml
+++ b/man/udev_device_has_tag.xml
@@ -7,8 +7,6 @@
 
 <!--
   SPDX-License-Identifier: LGPL-2.1+
-
-  Copyright © 2015 David Herrmann <dh.herrmann@gmail.com>
 -->
 
 <refentry id="udev_device_has_tag"
@@ -17,15 +15,6 @@
   <refentryinfo>
     <title>udev_device_has_tag</title>
     <productname>systemd</productname>
-
-    <authorgroup>
-      <author>
-        <contrib>Developer</contrib>
-        <firstname>David</firstname>
-        <surname>Herrmann</surname>
-        <email>dh.herrmann@gmail.com</email>
-      </author>
-    </authorgroup>
   </refentryinfo>
 
   <refmeta>
@@ -120,12 +109,19 @@
     <function>udev_device_get_property_value()</function> and
     <function>udev_device_get_sysattr_value()</function> return a
     pointer to a constant string of the requested value. On error,
-    <constant>NULL</constant> is returned.</para>
+    <constant>NULL</constant> is returned. Attributes that may
+    contain <constant>NUL</constant> bytes should not be retrieved
+    with <function>udev_device_get_sysattr_value()</function>;
+    instead, read them directly from the files within the device's
+    <property>syspath</property>.</para>
 
     <para>On success,
     <function>udev_device_set_sysattr_value()</function> returns
     an integer greater than, or equal to, <constant>0</constant>.
-    On failure, a negative error code is returned.</para>
+    On failure, a negative error code is returned. Values that
+    contain <constant>NUL</constant> bytes should not be set with
+    this function; instead, write them directly to the files within
+    the device's <property>syspath</property>.</para>
 
     <para>On success, <function>udev_device_has_tag()</function>
     returns <constant>1</constant> or <constant>0</constant>,