spull_load

Linux Device Drivers 2nd 经典书籍的配套源码

#!/bin/sh
module="spull"
device="pd"
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.o $* || exit 1

major=`cat /proc/devices | awk "\\$2==\"$module\" {print \\$1}"`

# 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/${device}[a-d][0-8] /dev/${device}[a-d]

for p in "" 1 2 3 4 5 6 7 8; do
	n=$p; if [ "$n" = "" ]; then n=0; fi
	mknod /dev/${device}a${p} b $major $n
	mknod /dev/${device}b${p} b $major `expr 16 + $n`
	mknod /dev/${device}c${p} b $major `expr 32 + $n`
	mknod /dev/${device}d${p} b $major `expr 48 + $n`
done

chgrp $group /dev/${device}[a-d][0-8]  /dev/${device}[a-d]
chmod $mode  /dev/${device}[a-d][0-8]  /dev/${device}[a-d]