#!/bin/bash
#
# Copyright (C) 2024 Masatake YAMATO <yamato@redhat.com>
#
# This file is part of util-linux.
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This file 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 General Public License for more details.
#

TS_TOPDIR="${0%/*}/../.."
TS_DESC="find an isolated net namespace via socket"

. "$TS_TOPDIR"/functions.sh
# for $EPERM
. "$TS_TOPDIR"/ts/lsfd/lsfd-functions.bash

ts_init "$*"

ts_check_test_command "$TS_CMD_LSNS"
ts_check_test_command "$TS_HELPER_MKFDS"
ts_check_test_command "$TS_HELPER_SYSINFO"

ts_skip_nonroot

if [ "$($TS_HELPER_SYSINFO ns-gettype-ok)" == "0" ]; then
    ts_skip "NS_GET_NSTYPE ioctl cmd not available"
fi
if [ "$($TS_HELPER_SYSINFO ns-getuserns-ok)" == "0" ]; then
    ts_skip "NS_GET_USERNS ioctl cmd not available"
fi

ts_cd "$TS_OUTDIR"

declare -A tcase
tcase[NS]=
tcase[TYPE]=net
tcase[NPROCS]=0
tcase[PID]=
tcase[USER]=root
tcase[COMMAND]=

PID_UNUSED=
NETNS=

{
    coproc MKFDS { "$TS_HELPER_MKFDS" foreign-sockets 3 4; }
    if read -r -u "${MKFDS[0]}" PID_UNUSED NETNS; then
	tcase[NS]=${NETNS}

	for t in $(for t0 in "${!tcase[@]}"; do echo "$t0"; done | sort); do
	    column=$t
	    expected=${tcase[$t]}
	    output=$(${TS_CMD_LSNS} -n --raw -o $column -Q "NS == $NETNS")
	    echo "$column \$? $?"

	    if [[ "${output}" == "$expected" ]]; then
		echo "$column == 0"
	    else
		echo "$column == 1"
		echo expected: "$expected"
		echo actual: "$output"
	    fi
	done
	echo DONE >&"${MKFDS[1]}"
    fi

    wait "${MKFDS_PID}"
} > $TS_OUTPUT 2>&1
if [[ "$?" == "$EPERM" ]]; then
    ts_skip "unshare(2) is not permitted on this platform"
fi
ts_finalize