#!/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="entering network namespace via socket"

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

ts_check_test_command "$TS_CMD_NSENTER"
ts_check_test_command "$TS_HELPER_MKFDS"

ts_check_prog "readlink"

ts_skip_nonroot

"$TS_HELPER_MKFDS" --dont-pause --quiet netns 6 2> /dev/null ||  ts_skip "ioctl(SIOCGSKNS) is not available"
ts_cd "$TS_OUTDIR"

FD0=3
FD1=4

PID=
NETNS=

{
    coproc MKFDS { "$TS_HELPER_MKFDS" foreign-sockets "$FD0" "$FD1"; }
    if read -r -u "${MKFDS[0]}" PID NETNS; then
	expected_netns="net:[$NETNS]"
	output_netns=$("$TS_CMD_NSENTER" --target "$PID" --net-socket "$FD0" readlink /proc/self/ns/net)
	echo "\$?: $?"
	if [[ "$expected_netns" == "$output_netns" ]]; then
	    echo "==: 0"
	else
	    echo "==: 1"
	    echo expected: "${expected_netns}"
	    echo output: "${output_netns}"
	fi
	echo DONE >&"${MKFDS[1]}"
    fi
    wait "${MKFDS_PID}"
} > $TS_OUTPUT 2>&1

ts_finalize