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|
#!/bin/bash
# Sample init script for the a driver module <rubini@linux.it>
DEVICE="scull"
SECTION="misc"
# The list of filenames and minor numbers: $PREFIX is prefixed to all names
PREFIX="scull"
FILES=" 0 0 1 1 2 2 3 3 priv 16
pipe0 32 pipe1 33 pipe2 34 pipe3 35
single 48 uid 64 wuid 80"
INSMOD=/sbin/insmod; # use /sbin/modprobe if you prefer
function device_specific_post_load () {
true; # fill at will
}
function device_specific_pre_unload () {
true; # fill at will
}
# Everything below this line should work unchanged for any char device.
# Obviously, however, no options on the command line: either in
# /etc/${DEVICE}.conf or /etc/modules.conf (if modprobe is used)
# Optional configuration file: format is
# owner <ownername>
# group <groupname>
# mode <modename>
# options <insmod options>
CFG=/etc/${DEVICE}.conf
# kernel version, used to look for modules
KERNEL=`uname -r`
#FIXME: it looks like there is no misc section. Where should it be?
MODDIR="/lib/modules/${KERNEL}/kernel/drivers/${SECTION}"
if [ ! -d $MODDIR ]; then MODDIR="/lib/modules/${KERNEL}/${SECTION}"; fi
# Root or die
if [ "$(id -u)" != "0" ]
then
echo "You must be root to load or unload kernel modules"
exit 1
fi
# Read configuration file
if [ -r $CFG ]; then
OWNER=`awk "\\$1==\"owner\" {print \\$2}" $CFG`
GROUP=`awk "\\$1==\"group\" {print \\$2}" $CFG`
MODE=`awk "\\$1==\"mode\" {print \\$2}" $CFG`
# The options string may include extra blanks or only blanks
OPTIONS=`sed -n '/^options / s/options //p' $CFG`
fi
# Create device files
function create_files () {
cd /dev
local devlist=""
local file
while true; do
if [ $# -lt 2 ]; then break; fi
file="${DEVICE}$1"
mknod $file c $MAJOR $2
devlist="$devlist $file"
shift 2
done
if [ -n "$OWNER" ]; then chown $OWNER $devlist; fi
if [ -n "$GROUP" ]; then chgrp $GROUP $devlist; fi
if [ -n "$MODE" ]; then chmod $MODE $devlist; fi
}
# Remove device files
function remove_files () {
cd /dev
local devlist=""
local file
while true; do
if [ $# -lt 2 ]; then break; fi
file="${DEVICE}$1"
devlist="$devlist $file"
shift 2
done
rm -f $devlist
}
# Load and create files
function load_device () {
if [ -f $MODDIR/$DEVICE.o ]; then
devpath=$MODDIR/$DEVICE.o
else if [ -f ./$DEVICE.o ]; then
devpath=./$DEVICE.o
else
devpath=$DEVICE; # let insmod/modprobe guess
fi; fi
if [ "$devpath" != "$DEVICE" ]; then
echo -n " (loading file $devpath)"
fi
if $INSMOD $devpath $OPTIONS; then
MAJOR=`awk "\\$2==\"$DEVICE\" {print \\$1}" /proc/devices`
remove_files $FILES
create_files $FILES
device_specific_post_load
else
echo " FAILED!"
fi
}
# Unload and remove files
function unload_device () {
device_specific_pre_unload
/sbin/rmmod $DEVICE
remove_files $FILES
}
case "$1" in
start)
echo -n "Loading $DEVICE"
load_device
echo "."
;;
stop)
echo -n "Unloading $DEVICE"
unload_device
echo "."
;;
force-reload|restart)
echo -n "Reloading $DEVICE"
unload_device
load_device
echo "."
;;
*)
echo "Usage: $0 {start|stop|restart|force-reload}"
exit 1
esac
exit 0
|
