ieee1394.agent

这是关于usb等方面的热拔插源代码

#!/bin/sh
#
# IEEE1394-specific hotplug policy agent.
#
# This should handle 2.4.10 (or later) IEEE1394 hotplugging, with a
# consistent framework for adding device and driver specific treatments.
#
# Kernel IEEE1394 params are:
#	
#	ACTION=add or remove
#	VENDOR_ID=24 bit vendor id
#	GUID=64 bit globally unique id
#	SPEFICIER_ID=24 bit id of owner of specification
#	VERSION=version of specification
#
# See IEEE1212 for details on these parameters.
#
# HISTORY:
#	26-Mar-2002	Small cleanups to match other .agent files. (gkh)
#	16-Sept-2001	Initial version from Kristian Hogsberg
#			<[e-mail]> (plus tweaks)
#
# $Id: ieee1394.agent,v 1.12 2004/03/13 18:49:45 ukai Exp $
#

cd /etc/hotplug
. ./hotplug.functions
# DEBUG=yes export DEBUG

# generated by modutils 2.4.9 or later, for 2.4.10 and later kernels
MAP_CURRENT=$MODULE_DIR/modules.ieee1394map

# accumulates list of modules we may care about
DRIVERS=

if [ "$ACTION" = "" ]; then
    mesg Bad IEEE1394 agent invocation
    exit 1
fi


device_vendor_id=$((0x$VENDOR_ID))
device_specifier_id=$((0x$SPECIFIER_ID))
device_version=$((0x$VERSION))

MATCH_VENDOR_ID=0x0001
MATCH_SPECIFIER_ID=0x0004
MATCH_VERSION=0x0008

#
# stdin is "modules.ieee1394map" syntax
# on return, all matching modules were added to $DRIVERS
#
ieee1394_map_modules ()
{
    local module ignored

    # comment line lists (current) pci_device_id field names
    read ignored

    while read module match_flags vendor_id model_id specifier_id version
    do
	: check match for $module

	# convert from hex to dec
	match_flags=$(($match_flags))
	vendor_id=$(($vendor_id)); model_id=$(($model_id))
	specifier_id=$(($specifier_id)); version=$(($version))

	: vendor_id $vendor_id $device_vendor_id
	if [ $(($match_flags & $MATCH_VENDOR_ID)) -ne 0 -a $vendor_id -ne $device_vendor_id ]; then
	    continue
	fi

	: specifier_id $specifier_id $device_specifier_id
	if [ $(($match_flags & $MATCH_SPECIFIER_ID)) -ne 0 -a $specifier_id -ne $device_specifier_id ]; then
	    continue
	fi

	: version $version $device_version
	if [ $(($match_flags & $MATCH_VERSION)) -ne 0 -a $version != $device_version ]; then
	    continue
	fi

        DRIVERS="$module $DRIVERS"
    done
}

#
# What to do with this IEEE1394 hotplug event?
#
case "$ACTION" in

add)
    LABEL="IEEE1394 product 0x$VENDOR_ID/0x$SPECIFIER_ID/0x$VERSION"

    # on 2.4 systems, modutils maintains MAP_CURRENT
    if [ -r $MAP_CURRENT ]; then
    	load_drivers ieee1394 $MAP_CURRENT "$LABEL"
    fi

    if [ "$DRIVERS" = "" ]; then
	mesg "... no drivers for $LABEL"
	exit 2
    fi
    ;;

remove)
    ieee1394_map_modules < $MAP_CURRENT
    for MODULE in $DRIVERS
    do
	if [ -x $HOTPLUG_DIR/ieee1394/$MODULE ]; then
            $HOTPLUG_DIR/ieee1394/$MODULE
	fi
    done
    ;;

*)
    debug_mesg "IEEE1394 '$ACTION' event not supported"
    exit 1
    ;;

esac