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Shell Programming and Scripting

Trying to center my output text

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Top Forums Shell Programming and Scripting Trying to center my output text
# 1  
Old 02-17-2009
Trying to center my output text
Im stumped on how to center the output of my echo command. I also would like to center my calender too, but is the command to center the same for echo and cal?
# 2  
Old 02-17-2009
cal is written in C and the output witdh is always known ahead of time.

This example depends on the COLUMNS environment variable, which can be changed by some things after you login -- to no longer match your tty.

Code:
center()
{
     
     value="$1" 
     if [[ $value -lt $COLUMNS ]] ; then
       width=$(( (  $COLUMNS - ${#value} ) / 2 ))
       printf "%${width}s\n"  "$1"
     else
        echo "$1"
     fi
}

#usage
center "print me at the center"

# 3  
Old 02-17-2009
assuming the your width is 79:
Code:
cal | sed  -e :a -e 's/^.\{1,77\}$/ & /;ta'

Courtesy of sed1liners
This User Gave Thanks to vgersh99 For This Post:
twinion
# 4  
Old 02-18-2009
both worked according to plan, thanks gentlemen
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