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keyboard_present () {
local kern kbdpattern class subclass protocol
kern=`uname -r`
case "$kern" in
2.0*|2.1*|2.2*|2.3*|2.4*|2.5*)
# can't check keyboard presence
return 0;
;;
esac
[ -d /sys/bus/usb/devices ] || return 0
for d in /sys/bus/usb/devices/*:*; do
class=$(cat "$d/bInterfaceClass") # 03 = Human Interface Device
subclass=$(cat "$d/bInterfaceSubClass") # 01 = Boot Interface Subclass
protocol=$(cat "$d/bInterfaceProtocol") # 01 = Keyboard
case "$class:$subclass:$protocol" in
03:01:01)
return 0
;;
esac
done
# For Bluetooth keyboards one has to check the class of the device
# -- it has to be 0x000540 or 0x002540. I don't how to make the
# required test, so instead we test (unreliably) for a string
# bluetooth.*keyboard in /proc/bus/input/devices.
[ -f /proc/bus/input/devices ] || return 0
kbdpattern="AT Set \|AT Translated Set\|AT Raw Set"
kbdpattern="$kbdpattern\|Atari Keyboard"
kbdpattern="$kbdpattern\|Amiga Keyboard"
kbdpattern="$kbdpattern\|HIL keyboard"
kbdpattern="$kbdpattern\|ADB keyboard"
kbdpattern="$kbdpattern\|Sun Type"
kbdpattern="$kbdpattern\|Apple MTP keyboard"
kbdpattern="$kbdpattern\|Apple SPI Keyboard"
kbdpattern="$kbdpattern\|bluetooth.*keyboard"
if grep -i "$kbdpattern" /proc/bus/input/devices >/dev/null; then
return 0
fi
return 1
}
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