Display time in window title

wintime

#!/bin/sh

if [ -z "${1}" ]; then
    echo "usage: ${0} <Window Title>" >&2
    exit 1
fi

WINTITLE="${1}"
WINID=$(wmctrl -l | grep ${WINTITLE} | cut -d' ' -f1)
if [ -z "${WINID}" ]; then
    echo "Window not found" >&2
    exit 2
fi

trap "wmctrl -i -r ${WINID} -N \"${WINTITLE}\"" EXIT

while wmctrl -i -r ${WINID} -N "${WINTITLE} – $(date +'%R')"; do
    sleep 10
done