source: general/genlib/libusb.xml@ 104733c

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY libusb-download-http "&sourceforge-repo;/libusb/libusb-&libusb-version;.tar.bz2">
  <!ENTITY libusb-download-ftp  "&sources-anduin-ftp;/l/libusb-&libusb-version;.tar.bz2">
  <!ENTITY libusb-md5sum        "df2447c23750ef2b4a314200feacc2ee">
  <!ENTITY libusb-size          "304 KB">
  <!ENTITY libusb-buildsize     "3.3 MB">
  <!ENTITY libusb-time          "less than 0.1 SBU">
]>

<sect1 id="libusb" xreflabel="libusb-&libusb-version;">
  <?dbhtml filename="libusb.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>libusb-&libusb-version;</title>

  <indexterm zone="libusb">
    <primary sortas="a-Libusb">Libusb</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to libusb</title>

    <para>The <application>libusb</application> package contains a library
    used by some applications for USB device access.</para>

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&libusb-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&libusb-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &libusb-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &libusb-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &libusb-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &libusb-time;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">libusb Dependencies</bridgehead>

    <bridgehead renderas="sect4">Optional
    (Required to Build the API Documentation)</bridgehead>
    <para role="optional"><xref linkend="doxygen"/></para>

    <para condition="html" role="usernotes">User Notes:
    <ulink url="&blfs-wiki;/libusb"/></para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of libusb</title>

    <para>Install <application>libusb</application> by running the following
    commands:</para>

<screen><userinput>./configure --prefix=/usr &amp;&amp;
make</userinput></screen>

    <para>If <application>Doxygen</application> is installed and you wish to
    build the API documentation, issue the following command:</para>

    <!-- not sure why we can't just use 'make -C doc docs' -->
<screen><userinput>pushd doc &amp;&amp;
make docs &amp;&amp;
popd</userinput></screen>

    <para>This package does not come with a test suite.</para>

    <para>Now, as the <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>make install</userinput></screen>

    <para>If you built the API documentation, install it using the following
    commands as the <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>install -v -d -m755 /usr/share/doc/libusb-&libusb-version;/apidocs &amp;&amp;
install -v -m644 doc/html/* \
    /usr/share/doc/libusb-&libusb-version;/apidocs</userinput></screen>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring Libusb</title>

<!--
    <para><application>libusb</application> requires the
    <systemitem class="filesystem">usbfs</systemitem> kernel filesystem
    to be mounted on <filename class="directory">/proc/bus/usb</filename>.
    Applications require the files in this directory to be accessible to the user,
    sometimes for both reading and writing. To restrict access to USB devices,
    ensure the <systemitem class="filesystem">usb</systemitem> group exits
    on your system. If necessary, create the <systemitem
    class="filesystem">usb</systemitem> group using the following command:</para>

<screen role='root'><userinput>groupadd -g 14 usb</userinput></screen>
-->

    <para id="libusb-kernel">To access raw USB devices (those not treated as a
    disk by the mass-storage driver), appropriate support must be available in
    the kernel.  Check your kernel configuration for Device Drivers &rArr; USB
    support &rArr; Support for Host-side USB.  Select any USB hardware device
    drivers you may need on the same page.</para>

    <indexterm zone="libusb libusb-kernel">
    <primary sortas="d-USB-device-filesystem">Support for Host-side USB</primary>
    </indexterm>

    <para>To have raw USB devices set up properly, add the following
    <application>udev</application> rule.</para>

<screen><literal>cat &gt; /etc/udev/rules.d/23-usb.rules &lt;&lt; "EOF"
# Set group ownership for raw USB devices
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", GROUP="usb"
EOF</literal></screen>

<!--
    <para>Fine-tuning of permissions is also possible by creating extra rules,
    matching on something like this (on one line).  The vendor and product can
    be found by searching the <filename
    class='directory'>/sys/devices</filename> directory entries or using
    <command>udevinfo</command> after the device has been attached.  See the
    documentation in the current udev directory of <filename
    class='directory'>/usr/share/doc></filename> for details.</para>

<screen><literal>SUBSYSTEM=="usb_device", SYSFS{idVendor}=="05d8",
SYSFS{idProduct}=="4002", GROUP:="scanner"</literal></screen>

    <para>Some older applications, such as <application>VMware</application>,
    need the following deprecated entry in the <filename>/etc/fstab</filename>
    file.  This is not normally needed.</para>

<screen><literal>usbfs  /proc/bus/usb  usbfs  devgid=14,devmode=0660  0  0</literal></screen>
-->

    <para>Add any users that need to access raw USB devices to the
    <systemitem class="groupname">usb</systemitem> group.</para>

<screen role="root"><userinput>usermod -a -G usb <replaceable>&lt;username&gt;</replaceable></userinput></screen>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>None</seg>
        <seg>libusb-1.0.{so,a}</seg>
        <seg>/usr/include/libusb-1.0 and optionally
        /usr/share/doc/libusb-&libusb-version;</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="libusb-lib">
        <term><filename class='libraryfile'>libusb-1.0.{so,a}</filename></term>
        <listitem>
          <para> libraries contain C functions for accessing
          USB hardware.</para>
          <indexterm zone="libusb libusb-lib">
            <primary sortas="c-libusb">libusb-1.0.{so,a}</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>