150 lines
3.7 KiB
Groff
150 lines
3.7 KiB
Groff
.\" @(#)types.5 1.1 94/10/31 SMI; from UCB 4.2
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.TH TYPES 5 "19 October 1987"
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.SH NAME
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types \- primitive system data types
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.SH SYNOPSIS
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.B #include <sys/types.h>
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.SH DESCRIPTION
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.IX "types file" "" "\fLtypes\fP \(em primitive system data types"
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.IX "primitive system data types" "" "primitive system data types \(em \fLtypes\fP"
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.IX "system data types" "" "system data types \(em \fLtypes\fP"
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.IX "data types" "" "data types \(em \fLtypes\fP"
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.LP
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The data types defined in the include file
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are used in the
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system code; some data of these types
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are accessible to user code:
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.LP
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.nf
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.ft B
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.ta \w'typedef\ \ 'u +\w'minor(x)\ \ 'u +\w' short\ \ 'u
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/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef _TYPES_
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#define _TYPES_
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/*
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* Basic system types.
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*/
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#include <sys/sysmacros.h>
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typedef unsigned char u_char;
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typedef unsigned short u_short;
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typedef unsigned int u_int;
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typedef unsigned long u_long;
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typedef unsigned short ushort; /* System V compatibility */
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typedef unsigned int uint; /* System V compatibility */
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#ifdef vax
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typedef struct _physadr { int r[1]; } *physadr;
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typedef struct label_t {
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int val[14];
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} label_t;
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#endif
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#ifdef mc68000
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typedef struct _physadr { short r[1]; } *physadr;
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typedef struct label_t {
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int val[13];
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} label_t;
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#endif
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#ifdef sparc
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typedef struct _physadr { int r[1]; } *physadr;
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typedef struct label_t {
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int val[2];
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} label_t;
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#endif
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#ifdef i386
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typedef struct _physadr { short r[1]; } *physadr;
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typedef struct label_t {
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int val[8];
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} label_t;
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#endif
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typedef struct _quad { long val[2]; } quad;
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typedef long daddr_t;
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typedef char * caddr_t;
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typedef u_long ino_t;
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typedef long swblk_t;
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typedef int size_t;
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typedef long time_t;
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typedef short dev_t;
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typedef long off_t;
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typedef u_short uid_t;
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typedef u_short gid_t;
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typedef long key_t;
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#define NBBY 8 /* number of bits in a byte */
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/*
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* Select uses bit masks of file descriptors in longs.
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* These macros manipulate such bit fields (the filesystem macros use chars).
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* FD_SETSIZE may be defined by the user, but the default here
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* should be >= NOFILE (param.h).
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*/
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 256
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#endif
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typedef long fd_mask;
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#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
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#ifndef howmany
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#ifdef sun386
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#define howmany(x, y) ((((u_int)(x))+(((u_int)(y))-1))/((u_int)(y)))
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#else
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#define howmany(x, y) (((x)+((y)-1))/(y))
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#endif
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#endif
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typedef struct fd_set {
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fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
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} fd_set;
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typedef char * addr_t;
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#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
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#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
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#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
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#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
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#ifdef sparc
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/*
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* routines that call setjmp have strange control flow graphs,
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* since a call to a routine that calls resume/longjmp will eventually
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* return at the setjmp site, not the original call site. This
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* utterly wrecks control flow analysis.
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*/
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extern int setjmp();
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#pragma unknown_control_flow(setjmp)
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#endif sparc
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#endif _TYPES_
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.ft R
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.fi
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.LP
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The form
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.I daddr_t
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is used for disk addresses,
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.\"except in an inode on disk,
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see
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.BR fs (5).
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Times are encoded in seconds since 00:00:00
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.SM GMT\s0,
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January 1, 1970.
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The major and minor parts of a device code
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specify kind and unit number of a device
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and are installation-dependent.
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Offsets are measured in bytes from the
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beginning of a file. The
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.I label_t
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variables are used to save the processor state
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while another process is running.
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.SH SEE ALSO
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.BR adb (1),
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.BR lseek (2),
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.BR time (3C),
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.BR fs (5)
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