purgeOldUsers.sh

#!/bin/bash

#  Modified 2015-03-11
#  delete_inactive_users.sh
#  Maintained at https://github.com/dankeller/macscripts
#  by Dan Keller
#
#  MIT License
#
# Modified by Daniel Engh
# Nov 8, 2017
#======================================
#
#  Script to delete local user data that has not been accessed in a given time
#  period.
#
#  This script scans the /Users folder for the date last updated (logged in)
#  and deletes the folder as well as the corresponding user account if it has
#  been longer than the time specified. You can specify user folders to keep as
#  well.
#
#  User data not stored in /Users is not effected.
#
#  Helpful for maintaing shared/lab Macs connected to an AD/OD/LDAP server.
#
#======================================

#----Variables----
# DEFAULT VALUE FOR "AGE" IS SET HERE
AGE=122 # Delete /Users/ folders inactive longer than this many days

# CHECK TO SEE IF A VALUE WAS PASSED IN PARAMETER 4 AND, IF SO, ASSIGN TO "AGE"
if [ "$4" != "" ]; then
  AGE=$4
fi

# User folders you would like to bypass. Typically local users or admin accounts.
KEEP=("/Users/Shared")

if [ "$5" != "" ]; then
	KEEP+=("/Users/"$5)
fi

if [ "$6" != "" ]; then
	KEEP+=("/Users/"$6)
fi

if [ "$7" != "" ]; then
	KEEP+=("/Users/"$7)
fi

if [ "$8" != "" ]; then
	KEEP+=("/Users/"$8)
fi

if [ "$9" != "" ]; then
	KEEP+=("/Users/"$9)
fi

if [ "${10}" != "" ]; then
	KEEP+=("/Users/"${10})
fi

if [ "${11}" != "" ]; then
	KEEP+=("/Users/"${11})
fi

#--End variables--


### Delete Inactive Users ###
if [[ ${UID} -ne 0 ]]; then
  echo "$0 must be run as root."
  exit 1
fi

USERLIST=$(/usr/bin/find /Users -type d -maxdepth 1 -mindepth 1 -not -name "." -mtime +"${AGE}")

echo "Performing inactive user cleanup"

for a in ${USERLIST}; do
  if ! [[ ${KEEP[*]} =~ "$a" ]]; then
    echo "Deleting inactive (over ${AGE} days) home directory: $a"

    # delete home folder
    /bin/rm -r "$a"
    continue
  else
    echo "SKIPPING $a"
  fi
done

echo "Cleanup complete"
exit 0