#!/bin/bash
set -xo pipefail
trap "stop; exit 0;" SIGTERM SIGINT

stop()
{
	echo "signal caught, stopping the world..."
	exportfs -uav
	rc-service krb5kdc stop
	rc-service kadmin stop
	rc-service nfs stop
	echo "bye!"
	exit
}

DEFALUT_TIMEZONE="America/New_York"
DEFAULT_PERMITTED="*"
RW_MODE="rw"
UID=${NFS_UID:-0}

apk add --no-cache --update alpine-conf
setup-timezone -z "${SRV_TZ:-${DEFALUT_TIMEZONE}}"
apk del alpine-conf

cat > /etc/chrony/chrony.conf << 'EOF'
	pool 0.pool.ntp.org iburst
	pool 1.pool.ntp.org iburst
EOF

rc-service chronyd start && rc-update add chronyd default

if [ -n "${SHARED_DIRECTORY}" ]; then
	mkdir -p /exports"${SHARED_DIRECTORY}"
	options="(${RW_MODE:-rw},no_root_squash,sync,no_subtree_check,insecure,sec=krb5p:krb5i:krb5)"
	mount --bind "${SHARED_DIRECTORY}" /exports"${SHARED_DIRECTORY}"
	cat > /etc/exports <<- EOE
/exports ${PERMITTED:-${DEFAULT_PERMITTED}}(${RW_MODE:-rw},no_root_squash,insecure,no_subtree_check,hide,fsid=0,sync,sec=krb5p:krb5i:krb5)
/exports${SHARED_DIRECTORY} ${PERMITTED:-${DEFAULT_PERMITTED}}${options%?},fsid=1)
EOE

	chmod 777 "${SHARED_DIRECTORY}"
else
	cp /etc/exports.mnt /etc/exports
	grep -vi "^[[:space:]]*#" /etc/exports | while read -r line; do
			if [ -n "${line}" ]; then
				trimmed="${line##*([[:space:]])}"
				# shellcheck disable=SC2001
				rcdir="$(eval "declare -a str=($( echo "$trimmed" | sed 's/[][`~!@#$%^&*():;<>.,?|{}=+-]/\\&/g' )); echo \${str[0]}")"
				cdir="${rcdir##*(\")}"
				echo "${cdir}"
				mkdir -p "/exports${cdir}"
				mount --bind -o rw "${cdir}" "/exports${cdir}"
				chmod 777 "/exports${cdir}"
			fi
	done
	sed -i -r '/^[[:space:]]*#/!s/^("?)/\1\/exports/' /etc/exports
	# root entry
	echo -e "\n/exports *(rw,no_root_squash,insecure,no_subtree_check,nohide,fsid=0,sync,sec=krb5p:krb5i:krb5)" >> /etc/exports
fi

# setup logging
syslogd 

./common.sh

exportfs -rvaf

export OPTS_RPC_MOUNTD='--debug all -t 8 -N 3'
cat >> /etc/conf.d/nfs <<EOC
OPTS_RPC_MOUNTD="${OPTS_RPC_MOUNTD}"
OPTS_RPC_NFSD="--debug --syslog"
EXPORTFS_TIMEOUT=30
EOC


rc-service krb5kdc start
rc-service krb5kadmind start
rc-service nfs start

# shellcheck disable=SC2046
kill -9 $(pidof rpc.svcgssd)
rpc.gssd -vf &> /var/log/rpc-gssd.log &
rpc.svcgssd -vf &> /var/log/gssd.log &

cat /etc/krb5.conf

while true; do
	sleep 360
done