Listing 2: idleuser script

#!/bin/sh
#
#       idleuser
#
#       Show users idle longer than specified days.
#
#       Copyright 1994, Lawrence S Reznick

if [ $# -ne 1 ]
then
echo "Usage:    $0 days\n"
echo "Show users logged in & idle for longer than the specified days."
exit 1
fi

finger |
cut -c-9,35-40 |
egrep "[0-9]+d" |
awk '{
if ( $2 + 0 >= days ) {
print $1, "(" $2 ")";
}
}' days=$1