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#!/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="${0%/*}/../.."
TS_DESC="fd opening a file cannot be stat(2)'ed"
. "$TS_TOPDIR"/functions.sh
ts_init "$*"
ts_check_test_command "$TS_CMD_LSFD"
ts_check_test_command "$TS_HELPER_MKFDS"
ts_check_test_command "$TS_CMD_SETPRIV"
ts_check_prog "chmod"
ts_check_prog "dd"
ts_check_prog "id"
ts_check_prog "mkdir"
ts_check_prog "rm"
ts_check_prog "rmdir"
ts_cd "$TS_OUTDIR"
pid=$$
DIR=d"$pid"
FILE=${DIR}/f"$pid"
if ! mkdir -p "$DIR"; then
ts_die "error in mkdir"
fi
if ! dd if=/dev/zero of="$FILE" bs=4096 count=1 status=none; then
rmdir "$DIR"
ts_die "error in dd"
fi
LAUNCHER=
if [ "$(id -u)" = 0 ]; then
chown -R 1 $DIR
LAUNCHER="$TS_CMD_SETPRIV --reuid=1"
LSFD_XOPT="--_drop-privilege"
fi
PID=
EXPR=
{
coproc MKFDS { $LAUNCHER "$TS_HELPER_MKFDS" mmap file="$FILE"; }
if read -u ${MKFDS[0]} PID; then
chmod u-rwx "$DIR"
EXPR='(ASSOC == "mem") and (NAME =~ ".*/'"$FILE"'$")'
${TS_CMD_LSFD} ${LSFD_XOPT} -p "$PID" -n -o ASSOC,TYPE,SOURCE -Q "$EXPR"
echo "ASSOC,TYPE,SOURCE: " $?
chmod u+rwx "$DIR"
rm "$FILE"
rmdir "$DIR"
echo DONE >&"${MKFDS[1]}"
fi
} > "$TS_OUTPUT" 2>&1
wait "${MKFDS_PID}"
ts_finalize
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