This sounds like an XY problem - if your goal is to autologin to the Pi, just pass your login script to kterm when it starts?
Try changing
/mnt/us/extensions/kterm/bin/kterm.sh to something like this:
Code:
#!/bin/sh
EXTENSION=/mnt/us/extensions/kterm
DPI=`cat /var/log/Xorg.0.log | grep DPI | sed -n 's/.*(\([0-9]\+\), [0-9]\+).*/\1/p'`
#use different layouts for high resolution devices
if [ ${DPI} -gt 290 ]; then
PARAM="-l ${EXTENSION}/layouts/keyboard-300dpi.xml"
elif [ ${DPI} -gt 200 ]; then
PARAM="-l ${EXTENSION}/layouts/keyboard-200dpi.xml"
fi
export TERM=xterm TERMINFO=${EXTENSION}/vte/terminfo
${EXTENSION}/bin/kterm ${PARAM} -e "/usr/bin/pi" "$@"