How to determine size of xterm?

sysbox · 05-04-2013, 10:37 AM

I want my PERL script to format it's output based on the size of the xterm it's running in. What command will tell me how many rows and columns?

EDIT: Nevermind: the output of 'resize' will produce this.

John VV · 05-04-2013, 05:42 PM

just a question
What is wrong with using "more" or " less" ?

jpollard · 05-04-2013, 10:33 PM

Quote:

Originally Posted by John VV

just a question
What is wrong with using "more" or " less" ?

It depends on what the script is doing. I wrote one once to edit forms, and thus needed the proper window size to position the fields correctly.

You can't use more/less to handle things like that.

NevemTeve · 05-05-2013, 08:11 AM

You can check LINES and COLUMNS environment variables.

sysbox · 05-05-2013, 06:39 PM

LINES and COLUMNS aren't set for me.

ntubski · 05-05-2013, 08:07 PM

Quote:

Originally Posted by NevemTeve

You can check LINES and COLUMNS environment variables.

They're just shell variables, not environment variables; they won't be passed to the perl script unless you export them.

Code:

~$ env | grep -E 'COLUMNS|LINES'
~$ set | grep -E 'COLUMNS|LINES'
COLUMNS=84
LINES=42
~$ export COLUMNS LINES
~$ env | grep -E 'COLUMNS|LINES'
COLUMNS=84
LINES=42