Systemd/man/udev_device_new_from_syspath.xml

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  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
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  Copyright 2015 David Herrmann <dh.herrmann@gmail.com>

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<refentry id="udev_device_new_from_syspath"
  xmlns:xi="http://www.w3.org/2001/XInclude">

  <refentryinfo>
    <title>udev_device_new_from_syspath</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>udev_device_new_from_syspath</refentrytitle>
    <manvolnum>3</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>udev_device_new_from_syspath</refname>
    <refname>udev_device_new_from_devnum</refname>
    <refname>udev_device_new_from_subsystem_sysname</refname>
    <refname>udev_device_new_from_device_id</refname>
    <refname>udev_device_new_from_environment</refname>
    <refname>udev_device_ref</refname>
    <refname>udev_device_unref</refname>

    <refpurpose>Create, acquire and release a udev device object</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <funcsynopsis>
      <funcsynopsisinfo>#include &lt;libudev.h&gt;</funcsynopsisinfo>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_new_from_syspath</function></funcdef>
        <paramdef>struct udev *<parameter>udev</parameter></paramdef>
        <paramdef>const char *<parameter>syspath</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_new_from_devnum</function></funcdef>
        <paramdef>struct udev *<parameter>udev</parameter></paramdef>
        <paramdef>char <parameter>type</parameter></paramdef>
        <paramdef>dev_t <parameter>devnum</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_new_from_subsystem_sysname</function></funcdef>
        <paramdef>struct udev *<parameter>udev</parameter></paramdef>
        <paramdef>const char *<parameter>subsystem</parameter></paramdef>
        <paramdef>const char *<parameter>sysname</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_new_from_device_id</function></funcdef>
        <paramdef>struct udev *<parameter>udev</parameter></paramdef>
        <paramdef>const char *<parameter>id</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_new_from_environment</function></funcdef>
        <paramdef>struct udev *<parameter>udev</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_ref</function></funcdef>
        <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
      </funcprototype>

      <funcprototype>
        <funcdef>struct udev_device *<function>udev_device_unref</function></funcdef>
        <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
      </funcprototype>

    </funcsynopsis>
  </refsynopsisdiv>

  <!--<refsect1>
    <title>Description</title>

    <para>XXX: Add some description.</para>
  </refsect1>-->

  <refsect1>
    <title>Return Value</title>

    <para>On success, <function>udev_device_new_from_syspath()</function>,
    <function>udev_device_new_from_devnum()</function>,
    <function>udev_device_new_from_subsystem_sysname()</function>,
    <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.
    <function>udev_device_ref()</function> returns the argument
    that it was passed, unmodified.
    <function>udev_device_unref()</function> always returns
    <constant>NULL</constant>.</para>
  </refsect1>

  <refsect1>
    <title>See Also</title>

    <para>
      <citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>udev_device_get_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>udev_device_has_tag</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>,
    </para>
  </refsect1>

</refentry>