UNIX for Dummies Questions & Answers

#!/bin/ksh93

while read user v1 v2 dt tm
do
   u_epoch_time=$( printf "%(%s)T" "${dt} ${tm}" )
   c_epoch_time=$( printf "%(%s)T" "now" )
   d_epoch_time=$(( $c_epoch_time - $u_epoch_time ))
   [ $d_epoch_time -gt 86400 ] && printf "%s User Checked out license for more than %.0f days\n" "$user" "$(( $d_epoch_time / 60 / 60 / 24 ))"
done < file.log

"date -d whatever" | getline