NAME

types - system data types

SYNOPSIS

DESCRIPTION

The file <sys/types.h> contains the defined data types used in the kernel (most are used throughout the system).

Note that in NetBSD code, when an integer of a specific width is needed, the C99 style should be used. The old BSD style are deprecated.

#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 uint64_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 uint32_t fixpt_t; /* fixed point number */ typedef uint32_t gid_t; /* group id */ typedef uint32_t ino_t; /* inode number */ typedef long key_t; /* IPC key (for Sys V IPC) */ typedef uint16_t mode_t; /* permissions */ typedef uint16_t nlink_t; /* link count */ typedef quad_t off_t; /* file offset */ typedef int32_t pid_t; /* process id */ typedef quad_t rlim_t; /* resource limit */ typedef int32_t segsz_t; /* segment size */ typedef int32_t swblk_t; /* swap offset */ typedef uint32_t uid_t; /* user id */

#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE) /* Major, minor numbers, dev_t's. */ #define major(x) ((int32_t)(((uint32_t)(x) >> 8) & 0xff)) #define minor(x) ((int32_t)((x) & 0xff)) #define makedev(x,y) ((dev_t)(((x) << 8) | (y))) #endif

#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

#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 256 #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_ */

SEE ALSO

lseek(2), select(2), truncate(2), byteorder(3), time(3), fs(5)

HISTORY

A types file appeared in Version 7 AT&T UNIX.