#!/bin/bash

INITSYS=`readlink -f /proc/1/exe`
if [ "$INITSYS" != "/lib/systemd/systemd" -a "$INITSYS" != "/usr/lib/systemd/systemd" ]; then
	echo "ERROR: This chr package supports only systemd."
	exit 0
fi

# create mysql user
getent group mysql >/dev/null 2>&1 ||
	addgroup --system mysql
getent passwd mysql >/dev/null 2>&1 ||
	adduser --system --home /nonexistent --no-create-home --disabled-password --shell /bin/false --ingroup mysql mysql

echo "Checking systemd notify,log socket placeholders"
/usr/lib/3gsystools/chr_placeholder_check /chroot/altmysqld/run /systemd/notify file
/usr/lib/3gsystools/chr_placeholder_check /chroot/altmysqld/run /systemd/journal/dev-log file

# restarting syslog
systemctl restart rsyslog

# creating link from /dev/log to systemd log socket
if ! [ -e /chroot/altmysqld/dev/log ]; then
	ln -s ../run/systemd/journal/dev-log /chroot/altmysqld/dev/log
fi

echo "Checking altmysql data folders"
test -e /srv/altmysql || install -m 755 -o mysql -g mysql -d /srv/altmysql
test -e /chroot/altmysqld/var/lib/mysql || install -m 755 -o mysql -g mysql -d /chroot/altmysqld/var/lib/mysql

echo "Checking altmysql log folders"
/usr/lib/3gsystools/chr_placeholder_check /srv /log dir
test -e /srv/log/altmysql || install -m 755 -o mysql -g mysql -d /srv/log/altmysql
test -e /chroot/altmysqld/var/log/mysql || install -m 755 -o mysql -g mysql -d /chroot/altmysqld/var/log/mysql

echo "Checking altmysql socket"
test -e /chroot/altmysqld/run/mysqld || install -m 755 -o mysql -g root -d /chroot/altmysqld/run/mysqld
test -e /run/altmysqld || install -m 755 -o mysql -g root -d /run/altmysqld

echo "Updating fstab"
/usr/local/sbin/fstab-chr

# delete deprecated units
[ -h /etc/systemd/system/multi-user.target.wants/altmariadb-chroot.service ] && rm /etc/systemd/system/multi-user.target.wants/altmariadb-chroot.service
[ -h /etc/systemd/system/multi-user.target.wants/altmysqld-chroot.service ] && rm /etc/systemd/system/multi-user.target.wants/altmysqld-chroot.service
[ -h /etc/systemd/system/multi-user.target.wants/altmysql-chroot.service ] && rm /etc/systemd/system/multi-user.target.wants/altmysql-chroot.service

if [ -h /etc/systemd/system/altmysqld-chroot.service ]; then
	sdst=`readlink /etc/systemd/system/altmysqld-chroot.service`
	if [ "x${sdst}" != "x/lib/systemd/system/altmariadb-chroot.service" ]; then
		rm /etc/systemd/system/altmysqld-chroot.service
	fi
fi

if [ -h /etc/systemd/system/altmysql-chroot.service ]; then
	sdst=`readlink /etc/systemd/system/altmysql-chroot.service`
	if [ "x${sdst}" != "x/lib/systemd/system/altmariadb-chroot.service" ]; then
		rm /etc/systemd/system/altmysql-chroot.service
	fi
fi

# activating systemd units
systemctl daemon-reload


# Enabling systemd units

SYSTEMD_UNITS="
	chr-altmysqld.target
	chroot-altmysqld-run-systemd-notify.mount
	chroot-altmysqld-tmp.mount
	chroot-altmysqld-run-systemd-journal-dev\\x2dlog.mount
	chroot-altmysqld-var-lib-mysql.mount
	chroot-altmysqld-var-log-mysql.mount
	altmariadb-chroot.service
	run-altmysqld.mount
"

for systemd_unit in $SYSTEMD_UNITS; do

	systemctl enable "${systemd_unit}"
	if deb-systemd-helper --quiet was-enabled "${systemd_unit}"; then
		deb-systemd-helper enable "${systemd_unit}" >/dev/null || true
	else
		deb-systemd-helper update-state "${systemd_unit}" >/dev/null || true
	fi

done

exit 0