Hot Corners Musical Sequence Command Script

Question

I am writing a script which uses hot corners to play specific musical notes when hovering in corners, and depending on the musical sequence to execute a specific command.

The script is called with parameter -d from bottom left, -e from b-right, -g from top-left, -b from top-right, appends the sequence in a file (~/bin/for_hot) and compares the sequence with my associative array. Plays a succesful musical B'' when the sequence is recognized.

2 issues:

Sometimes the commands won't execute, even though the succesful sound plays;

I don't manage to poweroff. [SOLVED]

I think I am not monitoring the processes adequately afterwards (kill, background), and also the file (~/bin/for_hot) I am appending may not be written to in time.

Here is the script, please note I am a noob in linux so don't hate my code, my question, me too much:

#!/bin/bash

#switch###############################
case "$1" in
-d) play -q -n synth 3 pluck 293.665 &
sleep 0.5
echo -n "d" >> ~/bin/for_hot;
;;
-e) play -q -n synth 3 pluck 311.127 &
sleep 0.5
echo -n "e" >> ~/bin/for_hot;
;;
-g) play -q -n synth 3 pluck 391.995 &
sleep 0.5
echo -n "g" >> ~/bin/for_hot;
;;
-b) play -q -n synth 3 pluck 466.164 &
sleep 0.5
echo -n "b" >> ~/bin/for_hot;
;;
esac
######################################

#midi mappings########################
declare -A commands
commands=( 
["egbd"]="firefox -n" 
["ebgb"]="idea" 
["ebb"]="notify-send "$instr "" 
["egdgb"]="echo pass | sudo -S poweroff"
["ee"]="nemo /home/mintbwoy");
######################################


s=$(<~/bin/for_hot);

for pattern in "${!commands[@]}";
do
echo "$pattern - ${commands["$pattern"]}";

if [[ "$s" == *"$pattern"* ]]
then
echo -n "" > ~/bin/for_hot;
play -q -n synth 3 pluck 932.328 &
var=$(${commands["$s"]});
$var;
notify-send "[$pattern] = ${commands["$pattern"]} "$var"";
fi

done
######################################

Use dbus to avoid using sudo with shutdown : http://askubuntu.com/a/454077/295286 — Sergiy Kolodyazhnyy, May 03 '16 at 11:43
Ah, well. Technically it's against the rules - one question per post. Try adding echo before $var , see what it says, if the commands are executed properly. Also , scripts are sequential, so if you have one command running, the script will wait for it to exit. Id use eval "$var" "&" , but that's not a 100% correct syntax. I'm on mobile and don't remember it off the top of my head — Sergiy Kolodyazhnyy, May 03 '16 at 12:55
@Serg apparently eval does the job really well, not sure why but my script is now even more responsive. Thank you — Andrei Ciurea, May 03 '16 at 13:11

score 0 · Accepted Answer · answered May 16 '16 at 18:27

0

I used eval to execute the command and:

var=$(${commands["$s"]}) got changed to

var=$(${commands["$pattern"]}) because I was refering the file content instead of the actual pattern.

answered May 16 '16 at 18:27

Andrei Ciurea

11

Hot Corners Musical Sequence Command Script

1 Answers1