#!/bin/bash
#
# Copyright (C) 2023 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="tun device and interface behind the device"

. "$TS_TOPDIR"/functions.sh
ts_init "$*"
ts_skip_nonroot

[[ -e /dev/net/tun ]] || ts_skip "/dev/net/tun doest not exist"

ts_check_test_command "$TS_CMD_LSFD"
ts_check_test_command "$TS_HELPER_MKFDS"

ts_cd "$TS_OUTDIR"

PID=
FD=3
IFNAME=

{
    coproc MKFDS { "$TS_HELPER_MKFDS" cdev-tun $FD ; }
    if read -u ${MKFDS[0]} PID IFNAME; then
	EXPR='(FD == '"$FD"')'
	${TS_CMD_LSFD} -p "${PID}" -n -o ASSOC,MODE,TYPE,SOURCE -Q "${EXPR}"
	echo 'ASSOC,MODE,TYPE,SOURCE': $?

	output=$(${TS_CMD_LSFD} -p "${PID}" -n --raw -o NAME -Q "${EXPR}")
	if [[ "$output" == "iface=$IFNAME" ]]; then
	    echo 'NAME': $?
	else
	    echo 'NAME': $?
	    echo "expected NAME: iface=$IFNAME"
	    echo "output NAME: $output"
	fi

	output=$(${TS_CMD_LSFD} -p "${PID}" -n --raw -o TUN.IFACE -Q "${EXPR}")
	if [[ "$output" == "$IFNAME" ]]; then
	    echo 'TUN.IFACE': $?
	else
	    echo 'TUN.IFAEC': $?
	    echo "expected TUN.IFACE: $IFNAME"
	    echo "output TUN.IFACE: $output"
	fi

	echo DONE >&"${MKFDS[1]}"
    fi
    wait ${MKFDS_PID}
} > $TS_OUTPUT 2>&1

ts_finalize