]>
<!--
+ SPDX-License-Identifier: LGPL-2.1+
+
This file is part of systemd.
Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
<function>udev_device_new_from_device_id()</function> and
<function>udev_device_new_from_environment()</function> return a
pointer to the allocated udev device. On failure,
- <constant>NULL</constant> is returned.
+ <constant>NULL</constant> is returned,
+ and <varname>errno</varname> is set appropriately.
<function>udev_device_ref()</function> returns the argument
that it was passed, unmodified.
<function>udev_device_unref()</function> always returns