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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