Re: Getting screen size into the env?

[Michael Parson]

On Mon, 11 Aug 2008, Juergen Weigert wrote:
> On Aug 07, 08 12:18:53 -0400, Mark Eichin wrote:
> > "Thomas Adam" <address@hidden> writes:
> > > 2008/8/7 Micah Cowan <address@hidden>:
> > > > However, if you use bash, it will set _shell_ variables, COLUMNS and
> > > > LINES, automatically. This isn't something that screen does, but bash.
> > > > Bash does _not_ export these by default, however; you'll need to do
> > > >
> > > >  $ export COLUMNS LINES
>
> This may work, if the screen does not get resized while it is running.
> I have my screen session inside an xterm, and resize frequently.
> environment variables would still reflect the old value after a resize.
>
> > > Rather unportably between Unixes:
> > >
> > > eval $(resize)
> >
> > resize requires having a terminal type that actually does xterm-style
> > answerback, which as at best a "maybe".
>
> When run from within screen, we guarantee you that xterm-style
> answerback is honored. Screen is an xterm-compatible device.

I used to use the eval $(resize) method a lot, but at some point, the
shell I use (bash 3.2.33, atm) has an option for checking the window
size before executing any command:

shopt -s checkwinsize

I'm not sure what version introduced this feature, I only discovered it
when I re-read the man-page after one of the 3.x releases.

--
Michael Parson
address@hidden