Mailinglist Archive: opensuse (1696 mails)

["David C. Rankin" <drankinatty@xxxxxxxxxxxxxxxxxx>]

On Thursday 23 July 2009 09:43:12 pm David C. Rankin wrote:
> On Thursday 23 July 2009 09:22:34 pm David C. Rankin wrote:
> > Listmates,
> >
> >     Here is one I'm having difficulty understanding. As part of your 
> > environment the "LINES" and "COLUMNS" variables are defined telling you the 
> > number of lines and columns an xterm has. Many old script examples make use 
> > of them. Now, I can't make use of them? Specifically, from the command line:
> >
> > echo $COLUMNS
> >
> >     properly returns the number of columns for the terminal. But calling or 
> > assigning $COLUMNS in a script no longer works. Try this in a bash script:
> >
> > #!/bin/bash
> > echo $COLUMNS
> > exit 0
> >
> >     Nothing?? Why?
>
> OK,
>
>       When did  "LINES" and "COLUMNS" stop being exported?

Hmm:

[21:58 alchemy:/home/david] # grep COLUMNS /etc/*
/etc/profile:   export LINES COLUMNS TERM

        Has the something with the shell changed that makes the export no 
longer available to scripts? Shell type? (login, etc..)

-- 
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
www.rankinlawfirm.com
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