#!/bin/sh

set -e

cd $(dirname $0)

. ../../common/config.sh
. ../../common/log.sh

log_start "$0" "setup gid mapping"

save_config

unpriv_userns=$( sysctl -n kernel.unprivileged_userns_clone )

# restore the system on exit
trap 'log_status "$0" "FAILURE"; restore_config; \
	rm -rf /tmp/test-gidmap; \
        sysctl -q kernel.unprivileged_userns_clone=$unpriv_userns' 0

change_config

echo -n "Enable unprivileged user namespaces... "
sysctl -q kernel.unprivileged_userns_clone=1
echo "OK"

echo -n "Create world writable tmp directory... "
rm -rf /tmp/test-gidmap
mkdir -m 0777 /tmp/test-gidmap
echo "OK"

echo -n "setup gidmapping... "
base=$(id -g foo)
runuser foo -g foo -c "unshare -U sleep 10 & pid=\$!; \
        sleep 2; newgidmap \$pid 0 $base 1 1 1000000 1000; ret=\$?; \
        cat /proc/\$pid/gid_map >/tmp/test-gidmap/gid_map;
        kill \$pid; exit \$ret"
../../common/compare_file.pl /tmp/test-gidmap/gid_map data/gid_map
echo "OK"

echo -n "Try to setup gidmapping with different primary group... "
runuser foo -g bar -c "unshare -U sleep 10 & pid=\$!; \
        sleep 2; newgidmap \$pid 0 $base 1 1 1000000 1000 2>/tmp/test-gidmap/newgidmap.err; ret=\$?; \
        kill \$pid; exit \$ret" && exit 1 || {
        status=$?
}
echo "OK"

echo -n "newgidmap returned status ($status)... "
test "status" != 0
echo "OK"

echo -n "Check that there were a failure message... "
grep -q 'newgidmap: Target process is owned by a different' /tmp/test-gidmap/newgidmap.err
echo "error message OK."
log_status "$0" "SUCCESS"

sysctl -q kernel.unprivileged_userns_clone=$unpriv_userns
rm -rf /tmp/test-gidmap;

restore_config
trap '' 0