.\"	$OpenBSD: types.5,v 1.12 2004/02/10 07:39:40 jmc Exp $
.\"	$NetBSD: types.5,v 1.4 1997/07/10 06:56:38 mikel Exp $
.\"
.\" Copyright (c) 1980, 1991, 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
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\"
.\"     @(#)types.5	8.1 (Berkeley) 6/5/93
.\"
.Dd June 5, 1993
.Dt TYPES 5
.Os
.Sh NAME
.Nm types
.Nd system data types
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Sh DESCRIPTION
The
.Aq Pa sys/types.h
file contains the defined data types used in the kernel (most are
used throughout the system).
.Bd -literal
#ifndef _SYS_TYPES_H_
#define	_SYS_TYPES_H_

/* Machine type dependent parameters. */
#include <machine/types.h>

#include <machine/ansi.h>
#include <machine/endian.h>

#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
typedef	unsigned char	u_char;
typedef	unsigned short	u_short;
typedef	unsigned int	u_int;
typedef	unsigned long	u_long;

typedef unsigned char	unchar;		/* Sys V compatibility */
typedef	unsigned short	ushort;		/* Sys V compatibility */
typedef	unsigned int	uint;		/* Sys V compatibility */
typedef unsigned long	ulong;		/* Sys V compatibility */
#endif

typedef	u_int64_t	u_quad_t;	/* quads */
typedef	int64_t		quad_t;
typedef	quad_t *	qaddr_t;

typedef	char *		caddr_t;	/* core address */
typedef	int32_t		daddr_t;	/* disk address */
typedef	int32_t		dev_t;		/* device number */
typedef	u_int32_t	fixpt_t;	/* fixed point number */
typedef	u_int32_t	gid_t;		/* group id */
typedef	u_int32_t	id_t;		/* may contain pid, uid or gid */
typedef	u_int32_t	ino_t;		/* inode number */
typedef	long		key_t;		/* IPC key (for Sys V IPC) */
typedef	u_int16_t	mode_t;		/* permissions */
typedef	u_int16_t	nlink_t;	/* link count */
typedef	int32_t		pid_t;		/* process id */
typedef u_quad_t	rlim_t;		/* resource limit */
typedef	int32_t		segsz_t;	/* segment size */
typedef	int32_t		swblk_t;	/* swap offset */
typedef	u_int32_t	uid_t;		/* user id */
typedef	u_int32_t	useconds_t;	/* microseconds */
typedef	int32_t		suseconds_t;	/* microseconds (signed) */

#ifdef	_BSD_CLOCK_T_
typedef	_BSD_CLOCK_T_	clock_t;
#undef	_BSD_CLOCK_T_
#endif

#ifdef	_BSD_SIZE_T_
typedef	_BSD_SIZE_T_	size_t;
#undef	_BSD_SIZE_T_
#endif

#ifdef	_BSD_SSIZE_T_
typedef	_BSD_SSIZE_T_	ssize_t;
#undef	_BSD_SSIZE_T_
#endif

#ifdef	_BSD_TIME_T_
typedef	_BSD_TIME_T_	time_t;
#undef	_BSD_TIME_T_
#endif

#ifdef	_BSD_CLOCKID_T_
typedef	_BSD_CLOCKID_T_	clockid_t;
#undef	_BSD_CLOCKID_T_
#endif

#ifdef	_BSD_TIMER_T_
typedef	_BSD_TIMER_T_	timer_t;
#undef	_BSD_TIMER_T_
#endif

#ifdef	_BSD_OFF_T_
typedef	_BSD_OFF_T_	off_t;
#undef	_BSD_OFF_T_
#endif

#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
/* Major, minor numbers, dev_t's. */
#define	major(x)	((int32_t)(((u_int32_t)(x) >> 8) & 0xff))
#define	minor(x)	((int32_t)((x) & 0xff) | (((x) & 0xffff0000) >> 8))
#define	makedev(x,y)	((dev_t)((((x) & 0xff) << 8) | ((y) & 0xff) | (((y) & 0xffff00) << 8)))
#endif

#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
#define	NBBY	8		/* number of bits in a byte */

/*
 * Select uses bit masks of file descriptors in longs.  These macros
 * manipulate such bit fields (the filesystem macros use chars).
 * FD_SETSIZE may be defined by the user, but the default here should
 * be enough for most uses.
 */
#ifndef	FD_SETSIZE
#define	FD_SETSIZE	1024
#endif

typedef int32_t	fd_mask;
#define NFDBITS	(sizeof(fd_mask) * NBBY)	/* bits per mask */

#ifndef howmany
#define	howmany(x, y)	(((x) + ((y) - 1)) / (y))
#endif

typedef	struct fd_set {
	fd_mask	fds_bits[howmany(FD_SETSIZE, NFDBITS)];
} fd_set;

#define	FD_SET(n, p)	((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define	FD_CLR(n, p)	((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#define	FD_ISSET(n, p)	((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#define	FD_COPY(f, t)	memcpy(t, f, sizeof(*(f)))
#define	FD_ZERO(p)	memset(p, 0, sizeof(*(p)))

#endif /* !defined(_POSIX_SOURCE) ... */
#endif /* !_SYS_TYPES_H_ */
.Ed
.Sh SEE ALSO
.Xr lseek 2 ,
.Xr select 2 ,
.Xr truncate 2 ,
.Xr byteorder 3 ,
.Xr time 3 ,
.Xr fs 5
.Sh HISTORY
A
.Nm
file appeared in
.At v7 .