source: general/genlib/libusb.xml@ 518538f

<?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 "2.1 MB">
<!ENTITY libusb-time "0.03 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>

<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"/></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>./configure --prefix=/usr --disable-build-docs &amp;&amp;
make &amp;&amp;
make install</command></userinput></screen>

</sect2>

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

<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><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><command>groupadd -g 14 usb</command></userinput></screen>

<!-- <para>Compiling the <quote>USB device filesystem</quote> as a kernel module is 
not recommended. However, if you did compile it as a module, you can install an 
init script to mount usbfs at system boot-up. An init script is included in the 
<xref linkend="intro-important-bootscripts"/> package and is installed using 
the following command:</para>

<screen><userinput><command>make install-usb</command></userinput></screen> -->

<para>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>

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

</sect2>

<sect2>
<title>Contents</title>

<para>The <application>libusb</application> package contains
<filename class="libraryfile">libusb</filename> libraries,
the <filename>/usr/include/usb.h</filename> header,
and a <command>usb-config</command> script.</para>

</sect2>

<sect2><title>Description</title>

<sect3><title>libusb libraries</title>
<para><filename class="libraryfile">libusb</filename> libraries contain C 
functions for accessing <acronym>USB</acronym> hardware.</para></sect3>

<sect3><title>usb-config</title>
<para>The <command>usb-config</command> script provides the right
compiler and linker flags for programs using this library.</para></sect3>

</sect2>

</sect1>