add_users() {
	_l="/etc/login.defs"
	_p="/etc/passwd"

	## get mini UID limit ##
	l=$(grep "^UID_MIN" $_l)

	## get max UID limit ##
	l1=$(grep "^UID_MAX" $_l)

	## use awk to print if UID >= $MIN and UID <= $MAX and shell is not /sbin/nologin   ##
	users=$(awk -F':' -v "min=${l##UID_MIN}" -v "max=${l1##UID_MAX}" '{ if ( $3 >= min && $3 <= max  && $7 != "/sbin/nologin" ) print $0 }' "$_p" | cut -d: -f1)
	for i in $users; do
		echo "Adding user '$i' to user-group 'sambashare'"
		usermod -a -G sambashare "$i"
	done
}

add_group() {
	getent group "sambashare" &>/dev/null || groupadd -r sambashare
	add_users
	chgrp sambashare var/lib/samba/usershare
}

post_upgrade() {
	add_group
}

post_install() {
	systemctl is-active smb >/dev/null || systemctl enable smb
	systemctl is-active nmb >/dev/null || systemctl enable nmb
	systemctl is-active avahi-daemon >/dev/null || systemctl enable avahi-daemon
	add_group
}

post_remove() {
	! systemctl is-enabled smb >/dev/null || systemctl disable smb
	! systemctl is-enabled nmb >/dev/null || systemctl disable nmb
	! getent group sambashare || groupdel sambashare
}
