override the existing line in linux output

Question

I have the following code:

echo "some output"

while true ; do 
  echo "running"
  ./call-me.sh
  echo "all done. ctrl+c to exit"
  sleep 5
done

I want to give the user the option to exit the script without worry about failing call-me.sh. This scripts results in something like:

some output
running
all done. ctrl+c to exit
running
all done. ctrl+c to exit
running
all done. ctrl+c to exit
running
all done. ctrl+c to exit
running
all done. ctrl+c to exit
running
all done. ctrl+c to exit
^C

I want to only show one line in the output, either running if call-me.sh is running or all done. ctrl+c to exit. I don't want to use clear as this is a part of a script and I want to leave the rest of the output as is. To sum up - I want to edit the last output line with new one. So the output will be either:

some output
running

or

some output
all done. ctrl+c to exit

Ideas?

I'm going to add a "stop file". if exits the script will delete it and exit.

this is great @Darkman ! please post an answer so I can mark it. — Nir, Feb 27 '22 at 15:40
Well, @Nir you might not know this - but you can't answer on a question that has been closed for whatever reasons. And in this case, it is not needed I think. — Darkman, Feb 27 '22 at 15:43

earthdomain · Answer 1 · 2022-02-27T12:48:34.293

0

Changed to the following, see if this works
test.sh has the following code

 while true ; do
      clear
      ./call-me.sh
      echo "\033[Kall done. ctrl+c to exit"
      sleep 5
    done

call-me.sh

printf "running\r"
sleep 10

See if this works for your case

edited Feb 27 '22 at 12:48

answered Feb 27 '22 at 11:46

earthdomain

42
4

have you read my last paragraph? i've edit my question so it will be clearer – Nir Feb 27 '22 at 12:21

override the existing line in linux output

1 Answers1