source: general/genlib/libusb.xml@ fa0eb91a

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
   "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

<!ENTITY libusb-download-http "http://prdownloads.sourceforge.net/libusb/libusb-&libusb-version;.tar.gz">
<!ENTITY libusb-download-ftp " ">
<!ENTITY libusb-size "314 KB">
<!ENTITY libusb-buildsize "4.5 MB (includes HTML documentation installation)">
<!ENTITY libusb-time "0.25 SBU">
]>

<sect1 id="libusb" xreflabel="libusb-&libusb-version;">
<sect1info>
<othername>$LastChangedBy$</othername>
<date>$Date$</date>
</sect1info>
<?dbhtml filename="libusb.html"?>
<title>libusb-&libusb-version;</title>
<indexterm zone="libusb">
<primary sortas="a-Libusb">Libusb</primary>
</indexterm>

<sect2>
<title>Introduction to <application>libusb</application></title>

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

<sect3><title>Package information</title>
<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 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>
</sect3>

<sect3><title><application>libusb</application> dependencies</title>
<sect4><title>Optional</title>
<para><xref linkend="openjade"/> and <xref linkend="sgml-dtd-3"/> (both 
required to build the <acronym>HTML</acronym> documentation)</para>
</sect4>
</sect3>

</sect2>

<sect2>
<title>Installation of <application>libusb</application></title>

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

<screen><userinput><command>libtoolize -f &amp;&amp;
autoreconf -f &amp;&amp;
./configure --prefix=/usr --disable-build-docs &amp;&amp;
make</command></userinput></screen>

<para>Now, as the root user:</para>

<screen><userinput role='root'><command>make install</command></userinput></screen>

<para>If you built the <acronym>HTML</acronym> documentation, install it using 
the following commands:</para>

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

</sect2>

<sect2>
<title>Command explanations</title>

<para><command>libtoolize -f</command>: There is a mismatch in the Autotools 
with <acronym>LFS</acronym>-6.0. This command forces the build to use the 
system installed <command>libtool</command> tools so that the shared library 
is created correctly.</para>

<para><command>autoreconf -f</command>: This command recreates some of the 
Autotools, required by running <command>libtoolize</command>.</para>

<para><option>--disable-build-docs</option>: This switch avoids building the
documentation. If you wish to build the documentation, you may need to remove 
the <application>OpenSP</application> catalog definitions from the system 
<acronym>SGML</acronym> catalogs. Use the following command before building 
the package to accomplish this:</para>

<screen><userinput role='root'><command>sed -i.orig \
    -e "/CATALOG \/etc\/sgml\/OpenSP-1.5.1.cat/d" \
    /etc/sgml/catalog \
    /etc/sgml/sgml-docbook.cat</command></userinput></screen>

</sect2>

<sect2>
<title>Configuring <application>libusb</application></title>

<para>libusb requires the usbfs 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 <acronym>USB</acronym> devices, 
ensure the usb group exits on your system. If necessary, create the usb group 
using the following command:</para>

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

<para id="libusb-kernel">Ensure that you have compiled the <quote>USB device 
filesystem</quote> directly into the kernel or compiled it as a module 
(listing the resulting <quote>usbcore</quote> module in the 
<filename>/etc/sysconfig/modules</filename> file). You should also have an 
entry similar to the line below in your <filename>/etc/fstab</filename> 
file:</para>
<indexterm zone="libusb libusb-kernel">
<primary sortas="d-USB-device-filesystem">USB device filesystem</primary>
</indexterm>

<screen><userinput role='root'>usbfs  /proc/bus/usb  usbfs  devgid=14,devmode=0660  0  0</userinput></screen>

</sect2>

<sect2>
<title>Contents</title>

<segmentedlist>
<segtitle>Installed Program</segtitle>
<segtitle>Installed Library</segtitle>
<segtitle>Installed Directory</segtitle>

<seglistitem>
<seg>usb-config</seg>
<seg>libusb.[so,a]</seg>
<seg>/usr/share/doc/libusb-&libusb-version;</seg>
</seglistitem>
</segmentedlist>

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

<varlistentry id="usb-config">
<term><command>usb-config</command></term>
<listitem><para>is a script that provides the right compiler and linker 
flags for programs using 
<filename class='libraryfile'>libusb</filename>.</para>
<indexterm zone="libusb usb-config">
<primary sortas="b-usb-config">usb-config</primary>
</indexterm></listitem>
</varlistentry>

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

</sect2>

</sect1>