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|
#!/bin/sh
#
# Load tracer module and create tracer device node.
#
MODULE="tracer"
MAIN_DEVICE="tracer"
USER_DEVICE="tracerU"
GROUP="root"
MODE="664"
start() {
if [ -e /dev/${MAIN_DEVICE} -o -e /dev/${USER_DEVICE} ]
then
# tell the user about what we are doing
echo "Deleting old tracer nodes: /dev/tracer and /dev/tracerU"
# remove stale nodes
rm -f /dev/${MAIN_DEVICE}
rm -f /dev/${USER_DEVICE}
fi
# look for the major number
MAJOR=`/bin/grep " ${MODULE}$" /proc/devices | cut -d" " -f1`
# does the device exist?
if [ ${MAJOR} ]
then
echo "Found tracer device with major number:" ${MAJOR}
else
echo "Loading tracer kernel module: "
# invoke modprobe
/sbin/modprobe ${MODULE}
MAJOR=`/bin/grep " ${MODULE}$" /proc/devices | cut -d" " -f1`
if [ ${MAJOR} ]
then
echo "Found tracer device with major number:" ${MAJOR}
else
echo "Did not find tracer device ... /dev entries not created ..."
exit 1
fi
fi
# tell the user about what we are doing
echo "Creating new tracer nodes: /dev/tracer and /dev/tracerU"
# create the character special file
/bin/mknod /dev/${MAIN_DEVICE} c ${MAJOR} 0
/bin/mknod /dev/${USER_DEVICE} c ${MAJOR} 1
# set permissions and ownership
/bin/chgrp ${GROUP} /dev/${MAIN_DEVICE}
/bin/chmod ${MODE} /dev/${MAIN_DEVICE}
/bin/chgrp ${GROUP} /dev/${USER_DEVICE}
/bin/chmod ${MODE} /dev/${USER_DEVICE}
}
stop() {
# tell the user about what we are doing
echo "Deleting tracer nodes: /dev/tracer and /dev/tracerU"
# remove nodes
rm -f /dev/${MAIN_DEVICE}
rm -f /dev/${USER_DEVICE}
if lsmod | /bin/grep "^${MODULE} "
then
echo -n "Removing tracer kernel module: "
# invoke modprobe -r
/sbin/modprobe -r ${MODULE}
echo "OK"
fi
}
restart() {
stop
start
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload)
restart
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit $?
|
