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#!/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="${0%/*}/../.."
TS_DESC="XMODE.m for classical system calls for multiplexing"
. "$TS_TOPDIR"/functions.sh
ts_init "$*"
ts_check_test_command "$TS_CMD_LSFD"
ts_check_test_command "$TS_HELPER_MKFDS"
# /proc/${PID}/syscall is rendered in the host side byteorder.
ts_skip_qemu_user
ts_check_prog "cat"
ts_check_prog "cut"
ts_check_prog "grep"
ts_cd "$TS_OUTDIR"
PID=
for multiplexer in pselect6 select poll ppoll; do
ts_init_subtest "${multiplexer}"
if ! "$TS_HELPER_MKFDS" -W | grep -q "^$multiplexer\$"; then
ts_skip_subtest "the multiplexer ${multiplexer} is not available"
continue
fi
{
coproc MKFDS { "$TS_HELPER_MKFDS" -w "$multiplexer" multiplexing {10..22}; }
} > "$TS_OUTPUT" 2>&1
if read -r -u "${MKFDS[0]}" PID; then
syscall_line=$(cat /proc/"${PID}"/syscall 2>> "$TS_OUTPUT")
syscall_status=$?
if [[ "$syscall_status" != 0 ]]; then
kill -CONT "${PID}"
wait "${MKFDS_PID}"
ts_skip_subtest "cannot open /proc/${PID}/syscall"
continue
fi
syscall_n=$(cut -f1 -d' ' <<< "$syscall_line")
# We assume the syscall number for the $multiplexer is not zero
# on any platforms.
if [[ "$syscall_n" == 0 ]]; then
kill -CONT "${PID}"
wait "${MKFDS_PID}"
ts_skip_subtest "incorrect syscall number in /proc/${PID}/syscall"
continue
fi
{
"${TS_CMD_LSFD}" -n -o ASSOC,XMODE -p "${PID}" -Q '(FD >= 10) && (FD <= 22)'
echo "[$multiplexer] ASSOC,XMODE: $?"
# For debugging
if [[ $("${TS_CMD_LSFD}" -n -o XMODE -p "${PID}" -Q '(FD == 10)') != "r----m" ]]; then
cat /proc/"${PID}"/syscall
fi
echo DONE >&"${MKFDS[1]}"
} >> "$TS_OUTPUT" 2>&1
fi
wait "${MKFDS_PID}"
ts_finalize_subtest
done
ts_finalize
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