scull_load

来自「通过本书,你可以学会写自己的设备驱动程序,并且可以钻研内核的相关部分.」· 代码 · 共 57 行

#!/bin/sh
module="scull"
device="scull"
group="wheel"
mode="664"

# invoke insmod with all arguments we got
/sbin/insmod -f $module $* || 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/${device}[0-3]
mknod /dev/${device}0 c $major 0
mknod /dev/${device}1 c $major 1
mknod /dev/${device}2 c $major 2
mknod /dev/${device}3 c $major 3
ln -sf ${device}0 /dev/${device}
chgrp $group /dev/${device}[0-3] 
chmod $mode  /dev/${device}[0-3]

rm -f /dev/${device}priv
mknod /dev/${device}priv  c $major 16
chgrp $group /dev/${device}priv
chmod $mode  /dev/${device}priv

rm -f /dev/${device}pipe[0-3]
mknod /dev/${device}pipe0 c $major 32
mknod /dev/${device}pipe1 c $major 33
mknod /dev/${device}pipe2 c $major 34
mknod /dev/${device}pipe3 c $major 35
ln -sf ${device}pipe0 /dev/${device}pipe
chgrp $group /dev/${device}pipe[0-3] 
chmod $mode  /dev/${device}pipe[0-3]

rm -f /dev/${device}single
mknod /dev/${device}single  c $major 48
chgrp $group /dev/${device}single
chmod $mode  /dev/${device}single

rm -f /dev/${device}uid
mknod /dev/${device}uid   c $major 64
chgrp $group /dev/${device}uid
chmod $mode  /dev/${device}uid

rm -f /dev/${device}wuid
mknod /dev/${device}wuid  c $major 80
chgrp $group /dev/${device}wuid
chmod $mode  /dev/${device}wuid