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#!/bin/bash
#
# Copyright (C) 2021 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="--pid option"

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

ts_check_test_command "$TS_CMD_LSFD"
ts_check_test_command "$TS_HELPER_MKFDS"
ts_check_prog "ps"

ts_cd "$TS_OUTDIR"

[ "$(ps --no-headers -o comm 1)" = 'systemd'  ] || ts_skip "pid 1 is not systemd"

PID=
FD=3
EXPR=
QOUT=
POUT=

{
    coproc MKFDS { "$TS_HELPER_MKFDS" ro-regular-file $FD file=/etc/group; }
    if read -u ${MKFDS[0]} PID; then
	EXPR='((PID == '"${PID}"') or (PID == 1)) and (FD == '"$FD"')'
	QOUT=$(${TS_CMD_LSFD} -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "${EXPR}")
	echo "QOUT:" $?

	POUT=$(${TS_CMD_LSFD} --pid="1 $PID" -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[--pid=1 PID]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[--pid=1 PID]:" $?

	POUT=$(${TS_CMD_LSFD} --pid="$PID 1" -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[--pid=PID 1]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[--pid=PID 1]:" $?

	POUT=$(${TS_CMD_LSFD} --pid="1,$PID" -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[--pid=1,PID]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[--pid=1,PID]:" $?

	POUT=$(${TS_CMD_LSFD} --pid="$PID,1" -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[--pid=PID,1]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[--pid=PID,1]:" $?

	POUT=$(${TS_CMD_LSFD} -p 1 --pid="$PID"  -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[-p 1 --pid=PID]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[-p 1 --pid=PID]:" $?

	POUT=$(${TS_CMD_LSFD} -p "$PID" --pid=1  -n -o ASSOC,MODE,TYPE,FLAGS,NAME -Q "(FD == $FD)")
	echo "POUT[-p PID --pid=1]:" $?
	[ "${QOUT}" = "${POUT}" ]
	echo "EQ[-p PID --pid=1]:" $?

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

ts_finalize