RE: LINES && COLS

[amores perros]

> From: Bob Rossi
> Subject: LINES && COLS
> Date: Sat, 28 Jan 2006 23:27:08 -0500
>
> Hi,
>
> I've spent a ton of time recently trying to understand how ncurses
> manipulates the LINES and COLS variables, and how they effect the
> display of the windows.
>
> For some reason, on Cygwin, my application does not display properly,
> unless I have a 25x80 terminal window.
>
> My program indirectly calls tgetent through readline, and I've noticed
> that on linux that calls set LINES and COLS to the correct size of the
> terminal. However on Cygwin that call does not set LINES and COLS at
> all.
>
> Finally, when initscr is called on Linux the variables are already set,
> and stay set. However, on Cygwin, they were not set, and get set to
> 25x80, which is not the size of the terminal.
>
> On both windows and linux the screen size is correct when I fetch it
> with the ioctl TIOCGWINSZ.
>
> If I set the environment variables LINES and COLUMNS, then on Cygwin the
> display works, cause initscr figures out the correct size of the
> terminal.

I don't know if this is any help at all, but lifelines correctly sizes to 
the cygwin
window size. I don't think it calls tgetent directly, and I'm not familiar 
with
TIOCGWINSZ.

But I do notice that the cygwin window appears to have the variables
LINES and COLUMNS set correctly from my resizing operation (I used the
console properties to make my cygwin window large to verify that lifelines
uses the full size available)

$ set | grep LINES
LINES=45

$ set | grep COLUMNS
COLUMNS=120

so apparently those environment variables are getting set by Windows for me?

Cordially,

Perry