Simple desktop notifications from cli

alarm.sh

#!/bin/bash
#
# Simply make some noise to notify user
# Usage:
#	alarm.sh [message]
#	echo alarm.sh | at 15:30
#

## Required variables
export DISPLAY=${DISPLAY:-":0.0"}

ALARM_MSG=${ALARM_MSG:-${1:-"$(date)"}}
ALARM_SND=${ALARM_SND:-"/usr/share/games/hedgewars/Data/Sounds/voices/Classic/Hello.ogg"}
ALARM_ICO=${ALARM_ICO:-"gtk-dialog-info"}

# Fallback for non-existing alarm sound
[ ! -f "${ALARM_SND}" ] && ALARM_SND="/usr/share/sounds/gnome/default/alerts/glass.ogg"

## Do the alert
# First on the console
echo -ne '\007'

# Try to make some sound
if [ -x $(which mplayer) ]; then
	mplayer --quiet "${ALARM_SND}" >/dev/null &
elif [ -x $(which beep) ]; then
	# Try beep as a last resort
	beep &
fi

# Display alert in GUI
if [ -x $(which notify-send) ]; then
	# Desktop notification will be the best
	notify-send -t 0 -i "${ALARM_ICO}" Alarm -u critical "${ALARM_MSG}"
elif [ -x $(which terminal-notifier) ]; then
	# Mac OS X notification, sometimes gets stuck, so just kill it after few
	# seconds and ignore
	( terminal-notifier -sound default -message "${ALARM_MSG}" ) & sleep 3; kill $!
elif [ -x $(which gxmessage) ]; then
	gxmessage -button ok -center "${ALARM_MSG}"
elif [ -x $(which xmessage) ]; then
	xmessage -button ok -center "${ALARM_MSG}"
else
	# Ok, we are screwed now, fallback to shell alert..
	echo "[ALARM] ${ALARM_MSG}" | write ${USER}
fi