Variable-sized data fields, BK1120.
#!/bin/sh
module="ec_msr_sample"
device="msr"
mode="664"
# 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==\"$device\" {print \\$1}"`
echo $major
# Remove stale nodes and replace them, then give gid and perms
# Usually the script is shorter, it's scull that has several devices in it.
rm -f /dev/${device}
mknod /dev/${device} c $major 0
# ln -sf ${device}0 /dev/${device}
chgrp users /dev/${device}
chmod $mode /dev/${device}