dump-crontabs

#! /bin/sh
# dump-crontabs (Bourne shell script) -- 

if [ -d /var/spool/cron/crontabs ] ; then
  DIR=/var/spool/cron/crontabs
else
  DIR=/var/spool/cron
fi
OUTPUT_DIR=tmp/$(date +%F)

set -e
mkdir $OUTPUT_DIR

for user in $(sudo ls $DIR) ; do
  # Only copy the file if it contains something
  if sudo [ -s $DIR/$user ] ; then
    sudo crontab -u $user -l > $OUTPUT_DIR/$user.cron
  fi
done