#!/bin/bash

# lxc: linux Container library

# Authors:
# Serge Hallyn <serge.hallyn@ubuntu.com>
#
# This is a test script for unprivileged containers

# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.

# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# This test assumes an Ubuntu host

if [ $(id -u) -ne 0 ]; then
	echo 'run as root'
	exit 1
fi
which newuidmap >/dev/null 2>&1 || { echo "'newuidmap' command is missing" >&2; exit 1; }

DONE=0
cleanup() {
	cd

	run_cmd lxc-stop -n c1 -k
	pkill -u $(id -u $TUSER) -9

	sed -i '/lxcunpriv/d' /run/lxc/nics /etc/lxc/lxc-usernet
	sed -i '/^lxcunpriv:/d' /etc/subuid /etc/subgid

	rm -Rf $HDIR /run/user/$(id -u $TUSER)

	deluser $TUSER

	if [ $DONE -eq 0 ]; then
		echo "FAIL"
		exit 1
	fi
	echo "PASS"
}

run_cmd() {
	sudo -i -u $TUSER \
	    env http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} \
	        XDG_RUNTIME_DIR=/run/user/$(id -u $TUSER) $*
}

# create a test user
TUSER=lxcunpriv
HDIR=/home/$TUSER

ARCH=i386
if type dpkg >/dev/null 2>&1; then
	ARCH=$(dpkg --print-architecture)
fi

trap cleanup EXIT SIGHUP SIGINT SIGTERM
set -eu

deluser $TUSER && rm -Rf $HDIR || true
useradd $TUSER

mkdir -p $HDIR
echo "$TUSER veth lxcbr0 2" > /etc/lxc/lxc-usernet
sed -i '/^lxcunpriv:/d' /etc/subuid /etc/subgid

usermod -v 910000-919999 -w 910000-919999 $TUSER

mkdir -p $HDIR/.config/lxc/
cat > $HDIR/.config/lxc/default.conf << EOF
lxc.network.type = veth
lxc.network.link = lxcbr0
lxc.id_map = u 0 910000 9999
lxc.id_map = g 0 910000 9999
EOF
chown -R $TUSER $HDIR

mkdir -p /run/user/$(id -u $TUSER)
chown -R $TUSER /run/user/$(id -u $TUSER)

cd $HDIR

if [ -e /sys/fs/cgroup/cgmanager/sock ]; then
	for d in $(grep -v ^# /proc/cgroups | awk '{print $1}'); do
		dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
			--type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.Create \
			string:$d string:$TUSER >/dev/null

		dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
			--type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.Chown \
			string:$d string:$TUSER int32:$(id -u $TUSER) int32:$(id -g $TUSER) >/dev/null

		dbus-send --print-reply --address=unix:path=/sys/fs/cgroup/cgmanager/sock \
			--type=method_call /org/linuxcontainers/cgmanager org.linuxcontainers.cgmanager0_0.MovePid \
			string:$d string:$TUSER int32:$$ >/dev/null
	done
else
	for d in /sys/fs/cgroup/*; do
		[ ! -d $d/lxctest ] && mkdir $d/lxctest
		chown -R $TUSER $d/lxctest
		echo $$ > $d/lxctest/tasks
	done
fi

run_cmd lxc-create -t download -n c1 -- -d ubuntu -r trusty -a $ARCH
run_cmd lxc-start -n c1 -d

p1=$(run_cmd lxc-info -n c1 -p -H)
[ "$p1" != "-1" ] || { echo "Failed to start container c1"; false; }

run_cmd lxc-info -n c1
run_cmd lxc-attach -n c1 -- /bin/true

DONE=1
