Bash - Show dialog infobox while operation - bash

Question

I'm scripting in bash for the first time. I'll crating a menu with dialog and add some function. I like to show a --infobox during a operation is running, so the user see something is happening.
The target is to have a dialogbox like
dialog --infobox "Please wait" 10 30
while the script is making the ping. If the ping is done, the --msgbox dialog opens.
test_rtt() {
ipSlave=$(awk '{ if($1~/'$SETSLAVE'/) print $2 }' $VARPATH/$VARCONFIGFILE)
pingSlave=$(fping -c1 -t300 $ipSlave 2>/dev/null 1>/dev/null)
if ! [ "$?" = 0 ]
then
result="Loopbox (Slave) not found on $ipSlave"
dialog \
--backtitle "$VARBACKTITLE" \
--title "$1" \
--no-collapse \
--msgbox "$result" $VARMENUHEIGHT $VARMENUWIDTH
fi
nrtest=$(awk '{ if($1~/'$SETNRTEST'/) print $2 }' $VARPATH/$VARCONFIGFILE)
intervl=$(awk '{ if($1~/'$SETINTERVL'/) print $2 }' $VARPATH/$VARCONFIGFILE)
result=$(ping -c $nrtest -i $intervl -U 192.168.74.93 | tail -1) #(HERE I WANT THE INFOBOX)
dialog \
--backtitle "$VARBACKTITLE" \
--title "$1" \
--no-collapse \
--msgbox "$result" $VARMENUHEIGHT $VARMENUWIDTH
}

Answer 1

If I get you correctly, you want to give the user the signal that "something is happening". I made two solutions. You can play with them.
The first one print the information before executing $(fping..
The second one uses dialog --progressbox to make progress box that is visible for the user.
I modified your code, so it pings 8.8.8.8 and checks if it's available.
#!/bin/bash
test_rtt() {
dialog --infobox "Please wait" 10 30
pingSlave=$(fping -c5 -t300 8.8.8.8 2>/dev/null 1>/dev/null)
# What is reason for introducing pingSlave var :)?
if [ "$?" = 0 ]
then
result="Ping succeed for 8.8.8.8"
dialog \
--backtitle "test1" \
--title "test2" \
--no-collapse \
--msgbox "$result" 50 50
fi
}
test_rtt_2() {
fping -c5 -t300 8.8.8.8 | dialog --progressbox 50 50
if [ "$?" = 0 ]
then
result="Ping succeed for 8.8.8.8"
dialog \
--backtitle "test1" \
--title "test2" \
--no-collapse \
--msgbox "$result" 50 50
fi
}
test_rtt
dialog --clear
test_rtt_2
dialog --clear
I hope that this is what you expected :).