term% cat index.txt TYPES(5) File Formats Manual TYPES(5)
NAME
types - primitive system data types
SYNOPSIS
#include <sys/types.h>
DESCRIPTION
The data types defined in the include file are used in UNIX system
code; some data of these types are accessible to user code:
/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/*
* POSIX Standard: 2.6 Primitive System Data Types <sys/types.h>
*/
#ifndef _SYS_TYPES_H
#define _SYS_TYPES_H 1
#include <features.h>
__BEGIN_DECLS
#include <bits/types.h>
#ifdef __USE_MISC
# ifndef __u_char_defined
typedef __u_char u_char;
typedef __u_short u_short;
typedef __u_int u_int;
typedef __u_long u_long;
typedef __quad_t quad_t;
typedef __u_quad_t u_quad_t;
typedef __fsid_t fsid_t;
# define __u_char_defined
# endif
typedef __loff_t loff_t;
#endif
#ifndef __ino_t_defined
# ifndef __USE_FILE_OFFSET64
typedef __ino_t ino_t;
# else
typedef __ino64_t ino_t;
# endif
# define __ino_t_defined
#endif
#if defined __USE_LARGEFILE64 && !defined __ino64_t_defined
typedef __ino64_t ino64_t;
# define __ino64_t_defined
#endif
#ifndef __dev_t_defined
typedef __dev_t dev_t;
# define __dev_t_defined
#endif
#ifndef __gid_t_defined
typedef __gid_t gid_t;
# define __gid_t_defined
#endif
#ifndef __mode_t_defined
typedef __mode_t mode_t;
# define __mode_t_defined
#endif
#ifndef __nlink_t_defined
typedef __nlink_t nlink_t;
# define __nlink_t_defined
#endif
#ifndef __uid_t_defined
typedef __uid_t uid_t;
# define __uid_t_defined
#endif
#ifndef __off_t_defined
# ifndef __USE_FILE_OFFSET64
typedef __off_t off_t;
# else
typedef __off64_t off_t;
# endif
# define __off_t_defined
#endif
#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
typedef __off64_t off64_t;
# define __off64_t_defined
#endif
#ifndef __pid_t_defined
typedef __pid_t pid_t;
# define __pid_t_defined
#endif
#if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined __id_t_defined
typedef __id_t id_t;
# define __id_t_defined
#endif
#ifndef __ssize_t_defined
typedef __ssize_t ssize_t;
# define __ssize_t_defined
#endif
#ifdef __USE_MISC
# ifndef __daddr_t_defined
typedef __daddr_t daddr_t;
typedef __caddr_t caddr_t;
# define __daddr_t_defined
# endif
#endif
#if (defined __USE_MISC || defined __USE_XOPEN) && !defined __key_t_defined
typedef __key_t key_t;
# define __key_t_defined
#endif
#if defined __USE_XOPEN || defined __USE_XOPEN2K8
# include <bits/types/clock_t.h>
#endif
#include <bits/types/clockid_t.h>
#include <bits/types/time_t.h>
#include <bits/types/timer_t.h>
#ifdef __USE_XOPEN
# ifndef __useconds_t_defined
typedef __useconds_t useconds_t;
# define __useconds_t_defined
# endif
# ifndef __suseconds_t_defined
typedef __suseconds_t suseconds_t;
# define __suseconds_t_defined
# endif
#endif
#define __need_size_t
#include <stddef.h>
#ifdef __USE_MISC
/* Old compatibility names for C types. */
typedef unsigned long int ulong;
typedef unsigned short int ushort;
typedef unsigned int uint;
#endif
/* These size-specific names are used by some of the inet code. */
#include <bits/stdint-intn.h>
/* These were defined by ISO C without the first `_'. */
typedef __uint8_t u_int8_t;
typedef __uint16_t u_int16_t;
typedef __uint32_t u_int32_t;
typedef __uint64_t u_int64_t;
#if __GNUC_PREREQ (2, 7)
typedef int register_t __attribute__ ((__mode__ (__word__)));
#else
typedef int register_t;
#endif
/* Some code from BIND tests this macro to see if the types above are
defined. */
#define __BIT_TYPES_DEFINED__ 1
#ifdef __USE_MISC
/* In BSD <sys/types.h> is expected to define BYTE_ORDER. */
# include <endian.h>
/* It also defines `fd_set' and the FD_* macros for `select'. */
# include <sys/select.h>
#endif /* Use misc. */
#if (defined __USE_UNIX98 || defined __USE_XOPEN2K8) && !defined __blksize_t_defined
typedef __blksize_t blksize_t;
# define __blksize_t_defined
#endif
/* Types from the Large File Support interface. */
#ifndef __USE_FILE_OFFSET64
# ifndef __blkcnt_t_defined
typedef __blkcnt_t blkcnt_t; /* Type to count number of disk blocks. */
# define __blkcnt_t_defined
# endif
# ifndef __fsblkcnt_t_defined
typedef __fsblkcnt_t fsblkcnt_t; /* Type to count file system blocks. */
# define __fsblkcnt_t_defined
# endif
# ifndef __fsfilcnt_t_defined
typedef __fsfilcnt_t fsfilcnt_t; /* Type to count file system inodes. */
# define __fsfilcnt_t_defined
# endif
#else
# ifndef __blkcnt_t_defined
typedef __blkcnt64_t blkcnt_t; /* Type to count number of disk blocks. */
# define __blkcnt_t_defined
# endif
# ifndef __fsblkcnt_t_defined
typedef __fsblkcnt64_t fsblkcnt_t; /* Type to count file system blocks. */
# define __fsblkcnt_t_defined
# endif
# ifndef __fsfilcnt_t_defined
typedef __fsfilcnt64_t fsfilcnt_t; /* Type to count file system inodes. */
# define __fsfilcnt_t_defined
# endif
#endif
#ifdef __USE_LARGEFILE64
typedef __blkcnt64_t blkcnt64_t; /* Type to count number of disk blocks. */
typedef __fsblkcnt64_t fsblkcnt64_t; /* Type to count file system blocks. */
typedef __fsfilcnt64_t fsfilcnt64_t; /* Type to count file system inodes. */
#endif
/* Now add the thread types. */
#if defined __USE_POSIX199506 || defined __USE_UNIX98
# include <bits/pthreadtypes.h>
#endif
__END_DECLS
#endif /* sys/types.h */
The form daddr_t is used for disk addresses except in an i-node on
disk, see filsys(5). Times are encoded in seconds since 00:00:00 GMT,
January 1, 1970. The major and minor parts of a device code specify
kind and unit number of a device and are installation-dependent. Off‐
sets are measured in bytes from the beginning of a file. The label_t
variables are used to save the processor state while another process is
running.
SEE ALSO
filsys(5), time(2), lseek(2), adb(1)
TYPES(5)