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diff --git a/man/libudev.xml b/man/libudev.xml new file mode 100644 index 0000000000..5660b9d990 --- /dev/null +++ b/man/libudev.xml @@ -0,0 +1,125 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [ +<!ENTITY % entities SYSTEM "custom-entities.ent" > +%entities; +]> + +<!-- + This file is part of systemd. + + Copyright 2015 David Herrmann <dh.herrmann@gmail.com> + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="libudev" + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>libudev</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> + <refentrytitle>libudev</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>libudev</refname> + <refpurpose>API for enumerating and introspecting local devices</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo> + </funcsynopsis> + + <cmdsynopsis> + <command>pkg-config --cflags --libs libudev</command> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><filename>libudev.h</filename> provides APIs to introspect + and enumerate devices on the local system.</para> + + <para>All functions require a libudev context to operate. This + context can be create via + <citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + It is used to track library state and link objects together. No + global state is used by libudev, everything is always linked to + a udev context. Furthermore, multiple different udev contexts can + be used in parallel by multiple threads. However, a single context + must not be accessed by multiple threads in parallel. The caller + is responsible of providing suitable locking if they intend to use + it from multiple threads.</para> + + <para>To introspect a local device on a system, a udev device + object can be created via + <citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry> + and friends. The device object allows to query current state, + read and write attributes and lookup properties of the device in + question.</para> + + <para>To enumerate local devices on the system, an enumeration + object can be created via + <citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> + + <para>To monitor the local system for hotplugged or unplugged + devices, a monitor can be created via + <citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> + + <para>Whenever libudev returns a list of objects, the + <citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry> + API should be used to iterate, access and modify those lists.</para> + + <para>Furthermore, libudev also exports legacy APIs that should + not be used by new software (and as such are not documented as + part of this manual). This includes the hardware-database known + as <constant>udev_hwdb</constant> (please use the new + <citerefentry><refentrytitle>sd-hwdb</refentrytitle><manvolnum>3</manvolnum></citerefentry> + API instead) and the <constant>udev_queue</constant> object to + query the udev-daemon (which should not be used by new software + at all).</para> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-device</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-hwdb</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |