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|
#
# Setup and BASH utility functions for use in hotplug agents
#
# Most essential parameters are passed from the kernel using
# environment variables. For more information, see the docs
# on-line at http://linux-hotplug.sourceforge.net or the
# sources for each hotplug-aware kernel subsystem.
#
# $Id: hotplug.functions,v 1.26 2004/04/01 07:33:32 kroah Exp $
#
#
# DEBUG=yes; export DEBUG
PATH=/bin:/sbin:/usr/sbin:/usr/bin
KERNEL=`uname -r`
MODULE_DIR=/lib/modules/$KERNEL
HOTPLUG_DIR=/etc/hotplug
if [ -f /etc/sysconfig/hotplug ]; then
. /etc/sysconfig/hotplug
fi
if [ -x /usr/bin/logger ]; then
LOGGER=/usr/bin/logger
elif [ -x /bin/logger ]; then
LOGGER=/bin/logger
else
unset LOGGER
fi
#
# for diagnostics
#
if [ -t 1 -o -z "$LOGGER" ]; then
mesg () {
echo "$@"
}
else
mesg () {
$LOGGER -t $(basename $0)"[$$]" "$@"
}
fi
debug_mesg () {
test "$DEBUG" = "" -o "$DEBUG" = no && return
mesg "$@"
}
#
# Not "modprobe --autoclean" ... one driver module can handle many
# devices. Unloading should be done when no devices are present.
# Autocleaning happens if none of the devices are open, once any of
# them gets opened; wrong timing.
#
MODPROBE="/sbin/modprobe -s -q"
#MODPROBE="/sbin/modprobe -vs"
####################################################################
#
# usage: load_driver type filename description
#
# modprobes driver module(s) if appropriate, and optionally
# invokes a driver-specific setup script (or user-mode driver).
#
# the "modules.*map" format file is guaranteed to exist
#
load_drivers ()
{
local LOADED TYPE FILENAME DESCRIPTION LISTER
DRIVERS=""
# make this routine more readable
TYPE=$1
FILENAME=$2
DESCRIPTION=$3
# should we use usbmodules, pcimodules? not on 2.5+, because sysfs
# ought to expose the data we need to find all candidate drivers.
# (on 2.5.48 it does for usb; but maybe not yet for pci.)
case "$KERNEL" in
2.2*|2.3*|2.4*) LISTER=`which ${TYPE}modules` ;;
*) LISTER="" ;;
esac
if [ "$LISTER" != "" ]; then
# lister programs MIGHT be preferable to parsing from shell scripts:
# - usbmodules used for (a) multi-interface devices, (b) coldplug
# - pcimodules used only for coldplug
case $TYPE in
usb)
# "usbutils-0.8" (or later) is needed in $PATH
# only works if we have usbfs
# ... reads more descriptors than are passed in env
# ... doesn't handle comment syntax either
if [ "$DEVICE" = "" -o ! -f "$DEVICE" ]; then
LISTER=
else
DRIVERS=`$LISTER --mapfile $FILENAME --device $DEVICE`
fi ;;
pci)
debug_mesg "pcimodules is scanning more than $PCI_SLOT ..."
DRIVERS=`$LISTER`
;;
esac
fi
# try parsing by shell scripts if no luck yet
if [ "$DRIVERS" = "" ]; then
${TYPE}_map_modules < $FILENAME
fi
# FIXME remove dups and blacklisted modules from $DRIVERS here
if [ "$DRIVERS" = "" ]; then
return
fi
# Note that DRIVERS aren't all going to be modules.
# For USB, some user-mode drivers or setup scripts may be listed.
debug_mesg Setup $DRIVERS for $DESCRIPTION
# either kernel or user mode drivers may need to be set up
for MODULE in $DRIVERS
do
# maybe driver modules need loading
LOADED=false
if ! lsmod | grep -q "^$(echo $MODULE|sed -e 's/-/_/g') " > /dev/null 2>&1; then
if grep -q "^$MODULE\$" $HOTPLUG_DIR/blacklist \
>/dev/null 2>&1; then
debug_mesg "... blacklisted module: $MODULE"
continue
fi
# statically linked modules aren't shown by 'lsmod',
# and user mode drivers will ONLY have a setup script;
# it's not an error if a module doesn't exist or won't load.
if $MODPROBE -n $MODULE >/dev/null 2>&1 &&
! $MODPROBE $MODULE >/dev/null 2>&1 ; then
mesg "... can't load module $MODULE"
else
# /etc/modules.conf may have set non-default module
# parameters ... handle per-device parameters in apps
# (ioctls etc) not in setup scripts or modules.conf
LOADED=true
fi
else
# This module is already loaded
LOADED=true
fi
# always run setup scripts after any matching kernel code has had
# a chance to do its thing, no matter whether it was dynamically
# or statically linked, or if there is only a user mode driver.
# the script might re-enumerate usb devices after firmware download,
# giving kernel code another chance.
if [ -x $HOTPLUG_DIR/$TYPE/$MODULE ]; then
debug_mesg Module setup $MODULE for $DESCRIPTION
$HOTPLUG_DIR/$TYPE/$MODULE
LOADED=true
fi
if [ "$LOADED" = "false" ]; then
mesg "missing kernel or user mode driver $MODULE "
fi
if echo "$MODULE" | grep -q "usb-storage" > /dev/null 2>&1 ; then
[ -x /usr/sbin/updfstab ] && /usr/sbin/updfstab
fi
done
}
####################################################################
#
# usage: log_to_stdout filename
#
# writes a copy of the current hotplug event to stdout.
# add buffering, to avoid interleaving reports!
#
log_to_stdout ()
{
if [ -x /bin/date ]; then
echo "HOTPLUG_TIME='$(/bin/date)'"
fi
env | egrep -v '^PATH=|^PWD=|^_=|^OLDPWD=|^SHLVL=|^HOME='
echo ''
# empty line terminates events
}
# vim:syntax=sh
|
