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Alarm

I couldn't find an alarm script one night so I wrote this. Basically it checks the time every minute, and uses mplayer to play a sound file when the alarm goes off. I found it was all too easy just to press escape and go back to sleep, so it asks you a (simple) maths question, which when you get the correct answer, disables the alarm.

This code depends on random, which basically just echoes random numbers to the terminal.

The following command activates the alarm.

$ alarm hour minute

This can be downloaded from here.

#!/bin/bash
alarmFile="/home/harry/.alarm/alarm.mp3"
maxRandom="20";
if [ $# -lt 2 ]
then
    echo Usage: 
    echo     $0 [hour] [minute]
    exit;
fi
echo "Setting alarm for $1:$2";
done="no"
while [ $done != "yes" ];
do
    if [ $1$2 == `date +%H%M` ]
    then
        echo "Wakey Wakey!"
        mplayer "$alarmFile" &> /dev/null &
        inta=1;
        intb=2;
        actual="0";
        answer=-1;
        while [[  $answer != $actual ]]
        do
            inta=`random $maxRandom`
            intb=`random $maxRandom`
            let actual=$inta+$intb
            read -p "$inta + $intb = " answer
        done
        echo "Ok, kill it."
        killall mplayer;
 
        done="yes"
    fi
 
    if [ $done != "yes" ]; then
        sleep 1m;
    fi
done

Harry Rose

Alarm