linux_module_learn/examples/sbull/sbull_load

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#!/bin/sh
function make_minors {
let part=1
while (($part < $minors)); do
let minor=$part+$2
mknod $1$part b $major $minor
let part=$part+1
done
}
# FIXME: This isn't handling minors (partitions) at all.
module="sbull"
device="sbull"
mode="664"
chardevice="sbullr"
minors=16
# Group: since distributions do it differently, look for wheel or use staff
if grep '^staff:' /etc/group > /dev/null; then
group="staff"
else
group="wheel"
fi
# invoke insmod with all arguments we got
# and use a pathname, as newer modutils don't look in . by default
/sbin/insmod -f ./$module.ko $* || exit 1
major=`cat /proc/devices | awk "\\$2==\"$module\" {print \\$1}"`
# Remove stale nodes and replace them, then give gid and perms
rm -f /dev/${device}[a-d]* /dev/${device}
mknod /dev/${device}a b $major 0
make_minors /dev/${device}a 0
mknod /dev/${device}b b $major 16
make_minors /dev/${device}b 16
mknod /dev/${device}c b $major 32
make_minors /dev/${device}c 32
mknod /dev/${device}d b $major 48
make_minors /dev/${device}d 48
ln -sf ${device}a /dev/${device}
chgrp $group /dev/${device}[a-d]*
chmod $mode /dev/${device}[a-d]*