.\" 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
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.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. 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.
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.\"     @(#)types.5	8.1 (Berkeley) 6/5/93
.\"	$Id$
.\"
.Dd June 5, 1993
.Dt TYPES 5
.Os BSD 4
.Sh NAME
.Nm types
.Nd system data types
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Sh DESCRIPTION
The file
.Pa sys/types.h
contains the defined data types used in the kernel (most are
used through out the system).
.Bd -literal
#ifndef _SYS_TYPES_H_
#define	_SYS_TYPES_H_

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

#ifndef _POSIX_SOURCE
typedef	unsigned char	u_char;
typedef	unsigned short	u_short;
typedef	unsigned int	u_int;
typedef	unsigned long	u_long;
typedef	unsigned short	ushort;		/* Sys V compatibility */
typedef	unsigned int	uint;		/* 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	u_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	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	_BSD_OFF_T_	off_t;		/* file offset */
typedef	_BSD_PID_T_	pid_t;		/* process id */
typedef	int32_t		segsz_t;	/* segment size */
typedef	int32_t		swblk_t;	/* swap offset */
typedef	u_int32_t	uid_t;		/* user id */

typedef quad_t		rlim_t; 	/* resource limits */

#ifdef KERNEL
typedef	int		boolean_t;
typedef	struct vm_page	*vm_page_t;
#endif

/*
 * This belongs in unistd.h, but is placed here to ensure that programs
 * casting the second parameter of lseek to off_t will get the correct
 * version of lseek.
 */
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
off_t	 lseek __P((int, off_t, int));
__END_DECLS
#endif

#ifndef _POSIX_SOURCE
/*
 * minor() gives a cookie instead of an index since we don't want to
 * change the meanings of bits 0-15 or waste time and space shifting
 * bits 16-31 for devices that don't use them.
 */
#define	major(x)	((int)(((u_int)(x) >> 8)&0xff))	/* major number */
#define	minor(x)	((int)((x)&0xffff00ff))		/* minor number */
#define	makedev(x,y)	((dev_t)(((x) << 8) | (y)))	/* create dev_t */
#endif

#include <machine/endian.h>

#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

#ifndef _POSIX_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	256
#endif

typedef long	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)	bcopy(f, t, sizeof(*(f)))
#define	FD_ZERO(p)	bzero(p, sizeof(*(p)))

#if defined(__STDC__) && defined(KERNEL)
/*
 * Forward structure declarations for function prototypes.  We include the
 * common structures that cross subsystem boundaries here; others are mostly
 * used in the same place that the structure is defined.
 */
struct	proc;
struct	pgrp;
struct	ucred;
struct	rusage;
struct	file;
struct	buf;
struct	tty;
struct	uio;
#endif

#endif /* !_POSIX_SOURCE */
#endif /* !_SYS_TYPES_H_ */
.Ed
.Sh SEE ALSO
.Xr gdb 1 ,
.Xr lseek 2 ,
.Xr time 3 ,
.Xr fs 5
.Sh HISTORY
A
.Nm
file appeared in
.At v7 .