#!/bin/bash

get_user_id()
{
	local user=$1
	local my_uid
	local my_gid

	if ! my_uid=`id -u $user`; then
		adduser --shell /bin/bash  $user
		passwd -d $user
	fi

	my_gid=`id -g $user`
	echo "$my_uid:$my_gid"
}

remove_container()
{
	local container=$1

	docker stop $container
	docker rm $container
}

add_container()
{
	local container=$1
	docker run --name $container --hostname=server.example.com \
		--device=/dev/ublk-control \
		--device-cgroup-rule='a *:* rmw' \
		--tmpfs /tmp --tmpfs /run --volume /sys/fs/cgroup:/sys/fs/cgroup:ro \
		--detach -i fedora:38
	docker exec -i $container dnf install -y git libtool automake autoconf g++ liburing-devel
	docker exec -i $container git config --global http.version HTTP/1.1
}

install_ublk()
{
	local container=$1

	docker exec -i $container git clone -b next https://github.com/ming1/ubdsrv.git
	docker exec -i -w /ubdsrv $container autoreconf -i
	docker exec -i -w /ubdsrv $container ./configure
	docker exec -i -w /ubdsrv $container make -j4 install
}

test_ublk()
{
	local container=$1
	local ugid=$2
	local ublk_script=`mktemp`

	echo "#!/bin/bash" >> $ublk_script
	echo "ublk add -t null -n 10 --unprivileged" >> $ublk_script
	echo "ublk list" >> $ublk_script
	echo "sleep 2" >> $ublk_script
	echo "ls -l /dev/ublk[bc]10" >> $ublk_script
	echo "dd if=/dev/zero of=/dev/ublkb10 bs=1M count=64" >> $ublk_script
	echo "ublk del -n 10" >> $ublk_script
	echo "sleep 2" >> $ublk_script
	echo "ls -l /dev/ublk[bc]10" >> $ublk_script

	chmod +x $ublk_script
	chown $ugid $ublk_script

	docker cp -a $ublk_script $container:/test.sh
	docker exec -u $ugid -i $container bash -c "cat /test.sh"
	docker exec -u $ugid -i $container bash -c ". /test.sh"
	rm -f $ublk_script
}

ublk_clean()
{
	local container=$1
	local this_log=$2

	cat $this_log
	remove_container $container > /dev/null 2>&1
	rm "$this_log"
	exit -1
}

C="ublk_docker"
UG=""
ULOG=`mktemp`

if ! UG=`get_user_id ublk_docker`; then
		echo "no ublk_docker user for running test"
		exit -1
fi

echo "setup container"
if ! add_container $C >> "$ULOG"; then
		echo "add container failed"
		ublk_clean $C "$ULOG"
fi

echo "install ublk from github"
if ! install_ublk $C >> "$ULOG" 2>&1; then
		echo "install ublk failed"
		ublk_clean $C "$ULOG"
fi

echo "add/del ublk inside container by user ublk_docker($UG)"
if ! test_ublk $C $UG; then
		echo "test ublk in container failed"
		ublk_clean $C "$ULOG"
fi

echo "remove container"
remove_container $C >> "$ULOG"
rm "$ULOG"