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Old 06-03-2007, 12:45 PM   #1
BlueSpirit
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Shell - Accessing COLUMNS in a script!?


Hello,

I would like to know : How can we be able to use the COLUMNS variable in a script???

I have done a script wich needs $COLUMNS in order to print a correct output.

Now what I hace is COLUMNSV=$3

So when i call thje function, i use

Code:
fkldrb 100 0.01 $COLUMNS
But it is not really useful...

How can I have access to it in the script?

Thank you,

BlueSpirit
 
Old 06-03-2007, 01:44 PM   #2
jlinkels
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Quote:
Originally Posted by BlueSpirit
Now what I hace is COLUMNSV=$3
What is a typo in this sentence and what isn't?

Quote:
Originally Posted by BlueSpirit
Code:
fkldrb 100 0.01 $COLUMNS
What is not working well here?

Quote:
Originally Posted by BlueSpirit
Code:
fkldrb 100 0.01 $COLUMNS
What program is fkldrb and what is it supposed to do?

In a script the $LINES and $COLUMNS environment variables cannot be retrieved as they are not exported in the shell.

Use
export LINES
in the shell before you call your program (not in a script). You can add it to your .profile if you want to have them set always.

jlinkels
 
Old 06-04-2007, 09:30 AM   #3
schneidz
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consider sed-awk for $row/ $column processing
 
Old 06-04-2007, 12:22 PM   #4
elsheikhmh
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use export to set the value of the variable COLUMNS. then use $COLUMNS to pass the value to your program
example:
Code:
mustafa@LILPC ~$ export COLUMNS=3
mustafa@LILPC ~$ seq 1 $COLUMNS
1
2
3
mustafa@LILPC ~$
Quote:
COLUMNSV=$3
what is COLUMNSV? and what is $3?
 
  


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