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Top Forums Shell Programming and Scripting How import $COLUMNS from set into script Post 302322041 by Tártaro on Tuesday 2nd of June 2009 04:03:08 PM
Old 06-02-2009
How import $COLUMNS from set into script

im trying to do this inside a bash script;

for ((a=$COLUMNS;a>0;a--))
do
printf "="
done
printf "\n"

With it i want to display an "equals" line as long as de curent shell window.
but i can't get the $COLUMNS variable from the set enviroment.

Some help please.

Last edited by Tártaro; 06-02-2009 at 06:10 PM..
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. DIAGNOSTICS
The column utility exits 0 on success, and >0 if an error occurs. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BSD
June 6, 1993 BSD
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