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https://github.com/systemd/systemd
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818bf54632
This part of the copyright blurb stems from the GPL use recommendations: https://www.gnu.org/licenses/gpl-howto.en.html The concept appears to originate in times where version control was per file, instead of per tree, and was a way to glue the files together. Ultimately, we nowadays don't live in that world anymore, and this information is entirely useless anyway, as people are very welcome to copy these files into any projects they like, and they shouldn't have to change bits that are part of our copyright header for that. hence, let's just get rid of this old cruft, and shorten our codebase a bit.
151 lines
5.8 KiB
XML
151 lines
5.8 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
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<!ENTITY % entities SYSTEM "custom-entities.ent" >
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%entities;
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]>
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
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-->
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<refentry id="udev_device_has_tag"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>udev_device_has_tag</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>David</firstname>
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<surname>Herrmann</surname>
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<email>dh.herrmann@gmail.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>udev_device_has_tag</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>udev_device_has_tag</refname>
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<refname>udev_device_get_devlinks_list_entry</refname>
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<refname>udev_device_get_properties_list_entry</refname>
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<refname>udev_device_get_tags_list_entry</refname>
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<refname>udev_device_get_sysattr_list_entry</refname>
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<refname>udev_device_get_property_value</refname>
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<refname>udev_device_get_sysattr_value</refname>
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<refname>udev_device_set_sysattr_value</refname>
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<refpurpose>Retrieve or set device attributes</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>struct udev_list_entry *<function>udev_device_get_devlinks_list_entry</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev_list_entry *<function>udev_device_get_properties_list_entry</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev_list_entry *<function>udev_device_get_tags_list_entry</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev_list_entry *<function>udev_device_get_sysattr_list_entry</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_property_value</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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<paramdef>const char *<parameter>key</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>udev_device_has_tag</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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<paramdef>const char *<parameter>tag</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_sysattr_value</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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<paramdef>const char *<parameter>sysattr</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>udev_device_set_sysattr_value</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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<paramdef>const char *<parameter>sysattr</parameter></paramdef>
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<paramdef>const char *<parameter>value</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!--<refsect1>
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<title>Description</title>
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<para>XXX: Add short description.</para>
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</refsect1>-->
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<refsect1>
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<title>Return Value</title>
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<para>On success,
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<function>udev_device_get_devlinks_list_entry()</function>,
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<function>udev_device_get_properties_list_entry()</function>,
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<function>udev_device_get_tags_list_entry()</function> and
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<function>udev_device_get_sysattr_list_entry()</function> return
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a pointer to the first entry of the retrieved list. If that list
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is empty, or if an error occurred, <constant>NULL</constant> is
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returned.</para>
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<para>On success,
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<function>udev_device_get_property_value()</function> and
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<function>udev_device_get_sysattr_value()</function> return a
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pointer to a constant string of the requested value. On error,
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<constant>NULL</constant> is returned.</para>
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<para>On success,
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<function>udev_device_set_sysattr_value()</function> returns
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an integer greater than, or equal to, <constant>0</constant>.
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On failure, a negative error code is returned.</para>
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<para>On success, <function>udev_device_has_tag()</function>
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returns <constant>1</constant> or <constant>0</constant>,
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depending on whether the device has the given tag or not.
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On failure, a negative error code is returned.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_device_get_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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