zenity and loops real problem

[kantor]

I write this scrips to automately check the ink's levels of my printer. I would the script to work that way:

0) sleep until the printer is on
1) tell a warning about the ink that reach less than 5% level at the last check
2) read the new levels
3) put the level in a notification on the taskbar
4) recheck the levels after a time of sleep or go to sleep at point 0 when printer goes off

The thing is, i put a lots of commands in a endless loop... but when zenity --notification is running there's no way to continue the loop. I mean with or without the --listen option.

This is the code:


#!/bin/bash

while true; do

while [ ! -e /dev/usb/lp0 ]; do
# Sleep until the printer device file is created
sleep 1
done

sleep 30s

#it tells about the ink's that was at less than 5% level at last check
if espeak -p 90 -v it "`cat warn`"
then
zenity --error --text="/dev/dsp busy problem with telling remind warnings about exausted inkpack checked at the last check"
fi


while [ -e /dev/usb/lp0 ]; do
#it reads the level of the ink's in the printer and if it is lower
#than 5% it change inkstat to make note of the need to change the
#inkpack
escputil -r /dev/usb/lp0 -i>status

inkstat=0000
num=5

#this next commands extract the value of percentage level of Cyan
string=`less status|grep Cyan`
clev=`echo ${string:39}`
if [ $clev -le $num ]
then
let "inkstat += 1"
fi

#this is for yellow
string=`less status|grep Yellow`
ylev=`echo ${string:39}`
if [ $ylev -le $num ]
then
let "inkstat += 10"
fi

#and so on...
string=`less status|grep Magenta`
mlev=`echo ${string:39}`
if [ $mlev -le $num ]
then
let "inkstat += 100"
fi

string=`less status|grep Black`
blev=`echo ${string:39}`
if [ $blev -le $num ]
then
let "inkstat += 1000"
fi

echo $inkstat>levs
echo Cyan $clev%>>levs
echo Yellow $ylev%>>levs
echo Magenta $mlev%>>levs
echo Black $blev%>>levs

#now the inkstat variable contains all the informations about the
#levels of inks in the printer
#and these commands write a warning about the inkpacks that needs to
#be changed
case "$inkstat" in
1111)
echo "Change all">warn
;;
1110)
echo "Change Black, Magenta and Yellow">warn
;;
1101)
echo "Change Black, Magenta and Cyan">warn
;;
1011)
echo "Change Black, Yellow and Cyan">warn
;;
111)
echo "Change Magenta, Yellow and Cyan">warn
;;
1100)
echo "Change Black and Magenta">warn
;;
1010)
echo "Change Black and Yellow">warn
;;
1001)
echo "Change Black and Cyan">warn
;;
110)
echo "Change Magenta and Yellow">warn
;;
101)
echo "Change Magenta and Cyan">warn
;;
11)
echo "Change Yellow and Cyan">warn
;;
1000)
echo "Change Black">warn
;;
100)
echo "Change Magenta">warn
;;
10)
echo "Change Yellow">warn
;;
1)
echo "Change Cyan">warn
;;
*)
echo "All ok">warn
;;
esac

#this added a warning at the end of levs file
cat warn>>levs
#and here is the problem, this command create a notification and the loop doesn't go on.
zenity --notification --listen --window-icon="info" --text="`cat levs`"
sleep 30m
done
done

[kantor]

solved, this is the working code in italian:


#!/bin/bash

exec 3> >(zenity --notification --text="Stampante spenta" --listen)

while true; do
if [ ! -e /dev/usb/lp0 ]; then
echo "icon:info" >&3
echo "tooltip:Stampante spenta" >&3
fi

while [ ! -e /dev/usb/lp0 ]; do
# Sleep until the printer device file is created
sleep 1s
done

echo "icon:info" >&3
echo "message:Stampante accesa, verifica stato attuale degli inchiostri della stampante in corso" >&3
echo "tooltip:Situazione degli inchiostri da ultima scansione:`cat warn`" >&3

# if espeak -p 90 -v it "`cat warn`"
# then
# echo "icon:error" >&3
# echo "message:Scheda audio occupata da un\'altra applicazione, impossibile comunicare verbalmente la situazione dei # livelli d'inchiostro" >&3
# fi

sleep 30s

while [ -e /dev/usb/lp0 ]; do
escputil -r /dev/usb/lp0 -i>status

inkstat=0000
num=5

string=`less status|grep Cyan`
clev=`echo ${string:39}`
if [ $clev -le $num ]
then
let "inkstat += 1"
fi

string=`less status|grep Yellow`
ylev=`echo ${string:39}`
if [ $ylev -le $num ]
then
let "inkstat += 10"
fi

string=`less status|grep Magenta`
mlev=`echo ${string:39}`
if [ $mlev -le $num ]
then
let "inkstat += 100"
fi

string=`less status|grep Black`
blev=`echo ${string:39}`
if [ $blev -le $num ]
then
let "inkstat += 1000"
fi

echo $inkstat>levs
echo Ciano $clev%>>levs
echo Giallo $ylev%>>levs
echo Magenta $mlev%>>levs
echo Nero $blev%>>levs

case "$inkstat" in
1111)

echo "Cambiare tutte le cartucce">warn
;;
1110)
echo "Cambiare Nero, Magenta e Giallo">warn
;;
1101)
echo "Cambiare Nero, Magenta e Ciano">warn
;;
1011)
echo "Cambiare Nero, Giallo e Ciano">warn
;;
111)
echo "Cambiare Magenta, Giallo e Ciano">warn
;;
1100)
echo "Cambiare Nero e Magenta">warn
;;
1010)
echo "Cambiare Nero e Giallo">warn
;;
1001)
echo "Cambiare Nero e Ciano">warn
;;
110)
echo "Cambiare Magenta e Giallo">warn
;;
101)
echo "Cambiare Magenta e Ciano">warn
;;
11)
echo "Cambiare Giallo e Ciano">warn
;;
1000)
echo "Cambiare Nero">warn
;;
100)
echo "Cambiare Magenta">warn
;;
10)
echo "Cambiare Giallo">warn
;;
1)
echo "Cambiare Ciano">warn
;;
*)
echo "Tutto apposto">warn
;;
esac

cat warn>>levs

if [ $inkstat -eq 0 ]
then
echo "icon:info" >&3
else
echo "icon:warning" >&3
fi
echo "tooltip:"`cat levs`"" >&3

sleep 30m
done
done

this link has been very useful for me, i saw a very poor documentation about zenity and even less about zenity --notification http://ubuntuforums.org/showthread.php?t=873796