/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)unistd.h	8.2 (Berkeley) 1/7/94
 * $FreeBSD: releng/12.4/sys/sys/unistd.h 353789 2019-10-21 01:24:21Z kevans $
 */

#ifndef _SYS_UNISTD_H_
#define	_SYS_UNISTD_H_

#include <sys/cdefs.h>

/*
 * POSIX options and option groups we unconditionally do or don't
 * implement.  Those options which are implemented (or not) entirely
 * in user mode are defined in <unistd.h>.  Please keep this list in
 * alphabetical order.
 *
 * Anything which is defined as zero below **must** have an
 * implementation for the corresponding sysconf() which is able to
 * determine conclusively whether or not the feature is supported.
 * Anything which is defined as other than -1 below **must** have
 * complete headers, types, and function declarations as specified by
 * the POSIX standard; however, if the relevant sysconf() function
 * returns -1, the functions may be stubbed out.
 */
#define	_POSIX_ADVISORY_INFO		200112L
#define	_POSIX_ASYNCHRONOUS_IO		200112L
#define	_POSIX_CHOWN_RESTRICTED		1
#define	_POSIX_CLOCK_SELECTION		(-1)
#define	_POSIX_CPUTIME			200112L
#define	_POSIX_FSYNC			200112L
#define	_POSIX_IPV6			0
#define	_POSIX_JOB_CONTROL		1
#define	_POSIX_MAPPED_FILES		200112L
#define	_POSIX_MEMLOCK			(-1)
#define	_POSIX_MEMLOCK_RANGE		200112L
#define	_POSIX_MEMORY_PROTECTION	200112L
#define	_POSIX_MESSAGE_PASSING		200112L
#define	_POSIX_MONOTONIC_CLOCK		200112L
#define	_POSIX_NO_TRUNC			1
#define	_POSIX_PRIORITIZED_IO		(-1)
#define	_POSIX_PRIORITY_SCHEDULING	0
#define	_POSIX_RAW_SOCKETS		200112L
#define	_POSIX_REALTIME_SIGNALS		200112L
#define	_POSIX_SEMAPHORES		200112L
#define	_POSIX_SHARED_MEMORY_OBJECTS	200112L
#define	_POSIX_SPORADIC_SERVER		(-1)
#define	_POSIX_SYNCHRONIZED_IO		(-1)
#define	_POSIX_TIMEOUTS			200112L
#define	_POSIX_TIMERS			200112L
#define	_POSIX_TYPED_MEMORY_OBJECTS	(-1)
#define	_POSIX_VDISABLE			0xff

#if __XSI_VISIBLE
#define	_XOPEN_SHM			1
#define	_XOPEN_STREAMS			(-1)
#endif

/*
 * Although we have saved user/group IDs, we do not use them in setuid
 * as described in POSIX 1003.1, because the feature does not work for
 * root.  We use the saved IDs in seteuid/setegid, which are not currently
 * part of the POSIX 1003.1 specification.  XXX revisit for 1003.1-2001
 * as this is now mandatory.
 */
#ifdef	_NOT_AVAILABLE
#define	_POSIX_SAVED_IDS	1 /* saved set-user-ID and set-group-ID */
#endif

/* Define the POSIX.1 version we target for compliance. */
#define	_POSIX_VERSION		200112L

/* access function */
#define	F_OK		0	/* test for existence of file */
#define	X_OK		0x01	/* test for execute or search permission */
#define	W_OK		0x02	/* test for write permission */
#define	R_OK		0x04	/* test for read permission */

/* whence values for lseek(2) */
#ifndef SEEK_SET
#define	SEEK_SET	0	/* set file offset to offset */
#define	SEEK_CUR	1	/* set file offset to current plus offset */
#define	SEEK_END	2	/* set file offset to EOF plus offset */
#endif
#if __BSD_VISIBLE
#define	SEEK_DATA	3	/* set file offset to next data past offset */
#define	SEEK_HOLE	4	/* set file offset to next hole past offset */
#endif

#ifndef _POSIX_SOURCE
/* whence values for lseek(2); renamed by POSIX 1003.1 */
#define	L_SET		SEEK_SET
#define	L_INCR		SEEK_CUR
#define	L_XTND		SEEK_END
#endif

/* configurable pathname variables */
#define	_PC_LINK_MAX		 1
#define	_PC_MAX_CANON		 2
#define	_PC_MAX_INPUT		 3
#define	_PC_NAME_MAX		 4
#define	_PC_PATH_MAX		 5
#define	_PC_PIPE_BUF		 6
#define	_PC_CHOWN_RESTRICTED	 7
#define	_PC_NO_TRUNC		 8
#define	_PC_VDISABLE		 9

#if __POSIX_VISIBLE >= 199309
#define	_PC_ASYNC_IO		53
#define	_PC_PRIO_IO		54
#define	_PC_SYNC_IO		55
#endif

#if __POSIX_VISIBLE >= 200112
#define	_PC_ALLOC_SIZE_MIN	10
#define	_PC_FILESIZEBITS	12
#define	_PC_REC_INCR_XFER_SIZE	14
#define	_PC_REC_MAX_XFER_SIZE	15
#define	_PC_REC_MIN_XFER_SIZE	16
#define	_PC_REC_XFER_ALIGN	17
#define	_PC_SYMLINK_MAX		18
#endif

#if __BSD_VISIBLE
#define	_PC_ACL_EXTENDED	59
#define	_PC_ACL_PATH_MAX	60
#define	_PC_CAP_PRESENT		61
#define	_PC_INF_PRESENT		62
#define	_PC_MAC_PRESENT		63
#define	_PC_ACL_NFS4		64
#endif

/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
#define	_PC_MIN_HOLE_SIZE	21

#if __BSD_VISIBLE
/*
 * rfork() options.
 *
 * XXX currently, some operations without RFPROC set are not supported.
 */
#define	RFNAMEG		(1<<0)	/* UNIMPL new plan9 `name space' */
#define	RFENVG		(1<<1)	/* UNIMPL copy plan9 `env space' */
#define	RFFDG		(1<<2)	/* copy fd table */
#define	RFNOTEG		(1<<3)	/* UNIMPL create new plan9 `note group' */
#define	RFPROC		(1<<4)	/* change child (else changes curproc) */
#define	RFMEM		(1<<5)	/* share `address space' */
#define	RFNOWAIT	(1<<6)	/* give child to init */
#define	RFCNAMEG	(1<<10)	/* UNIMPL zero plan9 `name space' */
#define	RFCENVG		(1<<11)	/* UNIMPL zero plan9 `env space' */
#define	RFCFDG		(1<<12)	/* close all fds, zero fd table */
#define	RFTHREAD	(1<<13)	/* enable kernel thread support */
#define	RFSIGSHARE	(1<<14)	/* share signal handlers */
#define	RFLINUXTHPN	(1<<16)	/* do linux clone exit parent notification */
#define	RFSTOPPED	(1<<17)	/* leave child in a stopped state */
#define	RFHIGHPID	(1<<18)	/* use a pid higher than 10 (idleproc) */
#define	RFTSIGZMB	(1<<19)	/* select signal for exit parent notification */
#define	RFTSIGSHIFT	20	/* selected signal number is in bits 20-27  */
#define	RFTSIGMASK	0xFF
#define	RFTSIGNUM(flags)	(((flags) >> RFTSIGSHIFT) & RFTSIGMASK)
#define	RFTSIGFLAGS(signum)	((signum) << RFTSIGSHIFT)
#define	RFPROCDESC	(1<<28)	/* return a process descriptor */
/* kernel: parent sleeps until child exits (vfork) */
#define	RFPPWAIT	(1<<31)
/* user: vfork(2) semantics, clear signals */
#define	RFSPAWN		(1U<<31)
#define	RFFLAGS		(RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \
    RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \
    RFPROCDESC | RFSPAWN | RFPPWAIT)
#define	RFKERNELONLY	(RFSTOPPED | RFHIGHPID | RFPROCDESC)

#endif /* __BSD_VISIBLE */

#endif /* !_SYS_UNISTD_H_ */
