alarmpi-0.3.sh

#!/bin/bash
#
# alarmpi-0.3
#
# Alarm script for working along with crond, MPD and tty-clock on a Raspberry Pi board  plugged in a HDTV through HDMI/CEC.
# Deps: cec-client, mpd, mpc, tty-clock
#
# Rodrigo Abreu <rodrigo@ilostmyself.org>
#

TERM=xterm
export TERM

PLAYLIST='alarmpi'              # Set your playlist for waking up
ENABLE_OUTPUTS=(2)                              # Enable output by index # i.e. ENABLE_OUTPUTS=(2 3). Run '$ mpc outputs' to check it out.
DISABLE_OUTPUTS=(1)             # Disable output by index # i.e. DISABLE_OUTPUTS=(1 4). Run '$ mpc outputs' to check it out again.
TIME=90                     # Alarm runtime period (in minutes)

# Prepare the screen for tty-clock
echo "on 0" | cec-client -s > /dev/null
echo -ne '\033[9;0]' > /dev/tty1
setterm -blank 0 -powerdown 0 > /dev/tty1

# Take a snapshot of the current outputs
SNAPSHOT_OUTPUTS=$(mpc outputs | awk '{ print $2 " " $(NF) }')

# Prepare the current queue for loading the alarmpi playlist and a previous restoration
mpc save tmp > /dev/null
mpc clear > /dev/null
mpc load $PLAYLIST > /dev/null

# Enable and disable the selected outputs defined at ENABLE_OUTPUTS and DISABLE_OUTPUTS variables
for output in ${DISABLE_OUTPUTS[@]}
do
    mpc disable $output  > /dev/null
done
for output in ${ENABLE_OUTPUTS[@]}
do
        mpc enable $output  > /dev/null
done

# Enable repeat
mpc repeat on > /dev/null

# Core
mpc play > /dev/null
tty-clock -S -c -t -d 3 > /dev/tty1 &
sleep $[$TIME*60]
TTY_CLOCK_PID=$(pidof tty-clock)
kill -9 $TTY_CLOCK_PID > /dev/null
mpc stop > /dev/null
clear > /dev/tty1
# echo "standby 0" | cec-client -s > /dev/null  # Turns off the TV. See if this line works isolatedly before to uncomment.

# Restore the previous audio outputs and queue like it has never been touched
arr=($(echo $SNAPSHOT_OUTPUTS | tr " " "\n"))
for (( i = 0 ; i < ${#arr[@]} ; i=$i+2 ))
do
        mpc ${arr[$i+1]%?} ${arr[$i]} > /dev/null
done
mpc clear > /dev/null
mpc load tmp > /dev/null
mpc rm tmp > /dev/null