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pLumo
Asked: 2019-04-25 00:33:47 +0800 CST

How to quit `whiptail --gauge`?

  • 772

I have this little example script:

for i in {1..100}; do
   echo $i
   sleep 0.1
done | whiptail --gauge "Doing something" 10 50 0

It works as it should, displaying a moving progress bar and quits when it reached 100.

Using the same for-loop without piping it to whiptail, I can stop it with Ctrl+C. But how can I interactively terminate the process piping to whiptail as Ctrl+C is not working here?

command-line

2 Answers

  1. Best Answer

    I have try different optiuons with whiptail, and seems the only solution is to execute it for every percent. Ctrl-C is working.
    Changing TERM is needed to make it work in gnome-terminal, same for xterm(tested it), and probably other terminals
    Tested in text console(tty) - it already have TERM=linux
    whiptail restores terminal text to same as before execution, but TERM=linux blocks this feature.

    #!/usr/bin/env bash

for i in {1..100}; do
   sleep 0.1
   export TERM=linux
   echo $i | whiptail --gauge "Doing something" 10 50 $i
done

    If you need to output some progress information, its better to do it inside whiptail text parameters

    • 3

  2. To quit the program you can try something like the following:

       for i in {1..100}; do
   echo $i
   sleep 0.1
   read -t 0.1 -N 1 input
   if [[ $input == 'q' ]] || [[ $input == "Q" ]];then
        break;
   fi
done | whiptail --gauge "Doing something. press 'q' or 'Q' to exit" 10 50 0

    Here the script will wait for user input 'q' or 'Q' to exit.

    • 0