#! /bin/bash
#
# center - center a group of lines
#
# tabs in the lines might cause this to look a little bit off
#
#
width=${COLUMNS:-80}
if [[ $# == 0 ]]
then
set -- /dev/stdin
fi
for file
do
while read -r
do
printf "%*s\n" $(( (width+${#REPLY})/2 )) "$REPLY"
done < $file
done
exit 0