/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory (Department of Computer Science and
 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
 * DARPA SSITH research programme.
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
 * ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */
#pragma once


/* <bits/fcntl.h> includes <bits/stat.h> which contains a member __unused */
#include "__unused_workaround_start.h"
#include_next <fcntl.h>
#include "__unused_workaround_end.h"

#ifdef __unused_undefd
#undef __unused_undefd
#define __unused __attribute__((unused))
#endif

#include <sys/file.h>

#ifndef O_EXLOCK
#define O_EXLOCK (1 << 30)
#endif
#ifndef O_SHLOCK
#define O_SHLOCK (1 << 31)
#endif

#undef open
#define open(path, flags, ...) ({ \
    int __fd = (open)(path, flags, ##__VA_ARGS__); \
    if (flags & O_EXLOCK) flock(__fd, LOCK_EX); \
    if (flags & O_SHLOCK) flock(__fd, LOCK_SH); \
    __fd; })