Udev rule and script for automatic keyboard layout settings

keyboard.rules

# /etc/udev/rules.d/00-keyboard.rules

ACTION=="add", ATTR{name}=="Bastard Keyboards Charybdis Nano", ATTR{phys}=="*/input0", OWNER="sapristi", RUN+="/usr/local/bin/usb-keyboard-udev Charybdis"

NOTE:
on ubunut, use ACTION=="bind", otherwise device may not be present !!

usb-keyboard

#! /bin/bash
# /usr/local/bin/usb-keyboard

SETXKBMAP=/usr/bin/setxkbmap
XINPUT=/usr/bin/xinput

KBNAME=$1
XKBLAYOUT="us"
XKBVARIANT="altgr-intl"

echo Setting layout $XKBLAYOUT $XKBVARIANT for $KBNAME
USERLIST=$(w -h | cut -d' ' -f1 | sort | uniq)

for CUR_USER in ${USERLIST}; do

    CUR_USER_XAUTH="$(sudo -Hiu ${CUR_USER} env | grep -e "^HOME=" | cut -d'=' -f2)/.Xauthority"
    # CUR_USER_XAUTH="/home/${CUR_USER}/.Xauthority"
    CUR_USER_DISPL=":0"

    export XAUTHORITY="${CUR_USER_XAUTH}"
    export DISPLAY="${CUR_USER_DISPL}"


    KEYBOARDS=$(/usr/bin/xinput list --short | grep $KBNAME | grep keyboard | grep -v Control | sed -e 's/^.*id=\([0-9]\+\).*/\1/g')
    if [ -n "$KEYBOARDS" ]; then
        for ID in $KEYBOARDS; do
            CMD="/usr/bin/setxkbmap -device $ID -layout $XKBLAYOUT -variant $XKBVARIANT"
            echo Running \"${CMD}\"
            $($CMD)
        done
    else
        echo "No keyboard found"
    fi

done

usb-keyboard-udev

#! /bin/sh
# /usr/local/bin/usb-keyboard-udev
LOG=/var/log/usb-keyboard.log
command=$(dirname $0)/usb-keyboard

echo $command $@ >> $LOG

[ -x "$command" ] && $command "$@" >>$LOG 2>&1 &