usr/src/share/man/man5/types.5

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.\"     @(#)types.5     6.2 (Berkeley) 4/29/91
.\"
.Dd April 29, 1991
.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 _TYPES_H_
#define _TYPES_H_

typedef short   dev_t;
#ifndef _POSIX_SOURCE
                                        /* major part of a device */
#define major(x)        ((int)(((unsigned)(x)>>8)&0377))
                                        /* minor part of a device */
#define minor(x)        ((int)((x)&0377))
                                        /* make a device number */
#define makedev(x,y)    ((dev_t)(((x)<<8) | (y)))
#endif

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 */

#include <machine/ansi.h>
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
#include <machine/types.h>
#endif

#ifdef  _CLOCK_T_
typedef _CLOCK_T_       clock_t;
#undef  _CLOCK_T_
#endif

#ifdef  _SIZE_T_
typedef _SIZE_T_        size_t;
#undef  _SIZE_T_
#endif

#ifdef  _TIME_T_
typedef _TIME_T_        time_t;
#undef  _TIME_T_
#endif

#ifndef _POSIX_SOURCE
typedef struct  _uquad { unsigned long val[2]; } u_quad;
typedef struct  _quad { long val[2]; } quad;
#endif
typedef long *  qaddr_t;        /* should be typedef quad * qaddr_t; */

typedef long    daddr_t;
typedef char *  caddr_t;
typedef u_long  ino_t;
typedef long    swblk_t;
typedef long    segsz_t;
typedef long    off_t;
typedef u_short uid_t;
typedef u_short gid_t;
typedef short   pid_t;
typedef u_short nlink_t;
typedef u_short mode_t;
typedef u_long  fixpt_t;

#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 >= NOFILE (param.h).
 */
#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_ZERO(p)      bzero((char *)(p), sizeof(*(p)))

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