CODEWITHSUNDEEP
bash
SnoopDougg
SnoopDougg

Reputation: 1609

bash show output only during runtime

I am trying to write a script that displays its output to the terminal only while it's running, much like the 'less' or 'ssh' commands.

When I launch said script, it would take over the whole terminal, print what it needs to print, and then when I exit the script, I would return to my terminal where the only record that my script has run will be the line that shows the command itself. When I scroll up, I don't want to see what my script output.

[snoopdougg@machine /home/snoopdougg/logs]$ ls
alog.log      blog.log      clog.log      myScript.sh
[snoopdougg@machine /home/snoopdougg/logs]$ whoami
snoopdougg
[snoopdougg@machine /home/snoopdougg/logs]$ ./myScript.sh
[snoopdougg@machine /home/snoopdougg/logs]$

(Like nothing ever happened... but myScript.sh would have print things to the terminal while it was running).

How can I do this?

Upvotes: 2

Views: 166

Answers (2)

Ruud Helderman
Ruud Helderman

Reputation: 11018

Use screen:

screen ./myScript.sh

Upvotes: 1

chepner
chepner

Reputation: 530950

You're talking about the alternate screen, which you can access with a pair of terminal attributes, smcup and rmcup. Put this in a script and run it for a small demo:

tput smcup
echo hello
sleep 5
tput rmcup

Upvotes: 4

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