#!/bin/sh -e
#
# (Un)registers systems accounts (users/groups).
#
# Arguments:	$ACTION = [run/targets]
#		$TARGET = [post-install/pre-remove]
#		$PKGNAME
#		$VERSION
#		$UPDATE = [yes/no]
#
ACTION="$1"
TARGET="$2"
PKGNAME="$3"
VERSION="$4"
UPDATE="$5"

useradd_cmd=usr/sbin/useradd
userdel_cmd=usr/sbin/userdel
groupadd_cmd=usr/sbin/groupadd
passwd_cmd=usr/bin/passwd
getent_cmd=usr/bin/getent

case "$ACTION" in
targets)
	echo "post-install pre-remove"
	;;
run)
	if [ ! -x $useradd_cmd -a ! -x $groupadd_cmd -a ! -x $passwd_cmd \
	       -a ! -x $getent_cmd ]; then
	       exit 0
	fi

	if [ -z "$system_accounts" ]; then
		exit 0
	fi

	case "$TARGET" in
	post-install)
		for acct in ${system_accounts}; do
			eval homedir="\$${acct}_homedir"
			eval shell="\$${acct}_shell"
			eval descr="\$${acct}_descr"
			eval groups="\$${acct}_groups"
			[ -z "$homedir" ] && homedir="/"
			[ -z "$shell" ] && shell="/sbin/nologin"
			[ -z "$descr" ] && descr="$acct unpriviledged user"
			[ -n "$groups" ] && groups="-G $groups"

			if ! $getent_cmd group ${acct} >/dev/null; then
				$groupadd_cmd -r ${acct} \
					2>&1 >/dev/null || exit $?
				echo "Created ${acct} system group."
			fi
			if ! $getent_cmd passwd ${acct} >/dev/null; then
				$useradd_cmd -c "$descr" -d "$homedir" \
					-s "$shell" -g ${acct} $groups \
					-r ${acct} && \
					$passwd_cmd -l ${acct} \
					2>&1 >/dev/null || exit $?
				echo "Created ${acct} system user."
			fi
		done
		;;
	pre-remove)
		#
		# Only unregister if we aren't updating a package.
		#
		if [ "$UPDATE" = "no" ]; then
			for acct in ${system_accounts}; do
				$userdel_cmd ${acct} 2>&1 >/dev/null
				if [ $? -eq 0 ]; then
					echo "Removed ${acct} system user/group."
				fi
			done
		fi
		;;
	esac
	;;
*)
	exit 1
	;;
esac

exit 0