loadmoudle

基于X86系统的Linux下的LED driver开发的example code, 并附带有相应的测试程序。

#!/bin/sh
module="LED_Config"
device="LED_Config"
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 /lib/modules/2.6.18_pro500-pc_target-x86_586/cus/$module.ko $* || exit 1
/sbin/insmod  ./$module.ko $* || 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 simple that has several devices in it.

rm -f /dev/${device}

mknod /dev/${device} c $major 0

chgrp $group /dev/${device}
 
chmod $mode  /dev/${device}