usbmodules(8)

NAME

usbmodules - List kernel driver modules available for a

plugged in USB device

SYNOPSIS

usbmodules  [--device  /proc/bus/usb/NNN/NNN  |  --product
xx/xx/xx --type dd/dd/dd --interface dd/dd/dd]  [--check  modulename] [--help] [--mapfile pathname] [--version pathname]

DESCRIPTION

usbmodules lists driver modules that may be able to manage

interfaces on currently plugged in USB devices. usbmodules may

be used on 2.4 kernels by /sbin/hotplug or one of its agents

(normally /etc/hotplug/usb.agent) when USB devices are "hot

plugged" into the system. This can be done by the following

Bourne shell syntax:

for module in $(usbmodules --device $DEVICE) ;

do

modprobe -s -k "$module"

done

or

for module in $(usbmodules --product $PRODUCT

--type $TYPE --interface $INTERFACE) ; do

modprobe -s -k "$module"

done

Note that the -k option of modprobe is not yet implemented

on 2.6 kernels and simply ignored.

The DEVICE environment variable is passed from the kernel

to /sbin/hotplug during USB hotplugging if the kernel was config

ured using usbdevfs. The environment variables PRODUCT, TYPE and

INTERFACE are set when /sbin/hotplug is called during hotplug

ging. usbmodules can operate with both configurations.

When a USB device is removed from the system, the Linux

kernel will decrement a usage count on USB driver module. If

this count drops to zero (i.e., there are no clients for the USB

device driver), then the modprobe -r process that is normally

configured to run from cron every few minutes will eventually re

move the unneeded module.

OPTIONS

--check modulename

Instead of listing the relevant modules, just exit

with code 0 (success) if the given module's exported USB ID pat

terns matches. Otherwise, return failure. usbmodules emits no

output either way.

--device /proc/bus/usb/MMM/NNN

Selects which device usbmodules will examine. The

argument is mandatory unless --product , --type and --interface

are used together.

--product xx/xx/xx --type dd/dd/dd --interface dd/dd/dd

Alternative way to select the device usbmodules

will examine. These arguments are mandatory unless --device is

given.

--help, -h

Print a help message

--mapfile /etc/hotplug/usb.handmap

Use the specified file instead of the /lib/mod

ules/.../modules.usbmap file corresponding to the running kernel.

--version

Identifies the version of usbutils this tool was

built with.

FILES

/lib/modules/<kernel-version>/modules.usbmap

This file is automatically generated by depmod,

versions 2.4.2 and later, and is used by usbmodules to determine

which modules correspond to which USB ID's.

/proc/bus/usb

An optional interface to USB devices provided by

Linux kernels with versions of the 2.4 USB support. Contains per

bus subdirectories with per-device files (offering a usermode

driver API as well as access to device and configuration descrip

tors), a devices file containing a list of all USB devices, and a

drivers file listing USB device drivers known to the USB subsys

tem.

SEE ALSO

lsusb(8), http://linux-hotplug.sourceforge.net

AUTHOR

usbmodules was written by Adam J. Richter <adam@yg

gdrasil.com>, and is based partly on lsusb, which was written by

Thomas Sailer <sailer@ife.ee.ethz.ch>.

COPYRIGHT

usbmodules is copyright 2000, Yggdrasil Computing, Incor

porated, and copyright 1999, Thomas Sailer. usbmodules may may

be copied under the terms and conditions of version 2 of the GNU

General Public License as published by the Free Software Founda

tion (Cambridge, Massachusetts, United States of America).

Debian-0.72 12 June 2001

usbmodules(8)