POSIX way of getting columns in tty? Post: 302275404

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Top Forums Shell Programming and Scripting POSIX way of getting columns in tty? Post 302275404 by Perderabo on Saturday 10th of January 2009 07:42:24 AM

01-10-2009

Administrator Emeritus

I guess you have never used a tty. There is no standard way to obtain columns or rows. There are lots of situations still in existence where it cannot be done. Most true terminals never had a way to inform the host about parameters like that because columns were pretty much locked to 80. A real teletype can't even reasonably have a notion of rows. It can't back up to the "top", you might have ripped off the paper. And how far it can go down depends only on how much paper is left. Real teletypes always had exactly 80 columns though. The tty driver was designed for real teletypes. HP had a super printing terminal that could support up to 132 "columns", (but we used the term "print positions"). It used pin feed style paper. You varied the columns by changing the paper. But the host could not enquire about paper size. Posix does not require that stty know about columns.

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LEARN ABOUT CENTOS

paperconfig

PAPERCONFIG(8)						   Linux Administrator's Manual 					    PAPERCONFIG(8)

NAME

       paperconfig - configure the system default paper size

SYNOPSIS

       paperconfig [ -v,--version ] [ -h,--help ] [ -p, --paper papername | --force ]

DESCRIPTION

       paperconfig sets the system (or default) paper to be used by tools using the papersize file.  It can either ask interactively for the paper
       to use or be called non-interactively by scripts.

       When the paper size has been changed, paperconfig notifies other packages of the change by  running  the  scripts  in  the  /etc/libpaper.d
       directory.

OPTIONS

       -v,--version
	      Print the version of paperconfig and exit.

       -h,--help
	      Print help about usage and exit.

       -p, --paper papername
	      Use papername if possible. If papername is not a valid paper, print an error message and exit.

       --force
	      Force interactive selection of the system paper even if the actual paper is a valid one.

ENVIRONMENT

       PAPERCONF Full path to a file containing the paper size to use; this file will be rewritten with the system paper size.

FILES

       /etc/papersize	   Contains the name of the system-wide default paper size to be used if the PAPERSIZE variable is not set.

       /etc/libpaper.d	   Directory  of scripts to run after the paper size has been changed.	This package puts no scripts here, but other pack-
			   ages may.

AUTHOR

       Yves Arrouye <arrouye@debian.org>

SEE ALSO

       paperconf(1)
       papersize(5)

Debian/Linux							  5 January 2005						    PAPERCONFIG(8)

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