OpenSolaris_b135/ucbhead/sys/param.h
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#ifndef _SYS_PARAM_H
#define _SYS_PARAM_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Fundamental variables; don't change too often.
*
* This file is included here for compatibility with
* SunOS, but it does *not* include all the values
* define in the SunOS version of this file.
*/
#include <sys/isa_defs.h>
#include <limits.h>
#include <unistd.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef MAX_INPUT
#define MAX_INPUT 512 /* Maximum bytes stored in the input queue */
#endif
#ifndef MAX_CANON
#define MAX_CANON 256 /* Maximum bytes for canoical processing */
#endif
#define UID_NOBODY 60001
#define GID_NOBODY 60001
#define UID_NOACCESS 60002 /* user ID no access */
#define MAXPID ((pid_t)sysconf(_SC_MAXPID)) /* max process id */
#define MAXUID 2147483647 /* max user id */
#define MAXLINK 32767 /* max links */
#define NMOUNT 40 /* est. of # mountable fs for quota calc */
/* The values below are defined in limits.h */
#define NOFILE OPEN_MAX /* max open files per process */
#define CANBSIZ 256 /* max size of typewriter line */
#define HZ ((int)sysconf(_SC_CLK_TCK)) /* ticks/second of the clock */
#define TICK (1000000000/((int)sysconf(_SC_CLK_TCK)))
#define NCARGS 0x100000 /* # characters in exec arglist */
/* must be multiple of NBPW. */
/*
* These define the maximum and minimum allowable values of the
* configurable parameter NGROUPS_MAX.
*/
#define NGROUPS_UMAX 32
#define NGROUPS_UMIN 8
#define NGROUPS NGROUPS_MAX /* max number groups, from limits.h */
#define NOGROUP -1 /* marker for empty group set member */
/*
* Priorities. Should not be altered too much.
*/
#define PMASK 0177
#define PCATCH 0400
#define PNOSTOP 01000
#define PSWP 0
#define PINOD 10
#define PSNDD PINOD
#define PAMAP PINOD
#define PPMAP PINOD
#define PRIBIO 20
#define PZERO 25
#define PMEM 0
#define NZERO 20
#define PPIPE 26
#define PVFS 27
#define PWAIT 30
#define PLOCK 35
#define PSLEP 39
#define PUSER 60
#define PIDLE 127
/*
* Fundamental constants of the implementation--cannot be changed easily.
*/
#define NBPS 0x20000 /* Number of bytes per segment */
#define NBPW sizeof (int) /* number of bytes in an integer */
#if defined(_LP64) && !defined(__cplusplus)
#define NULL 0L
#else
#define NULL 0
#endif
#define CMASK 0 /* default mask for file creation */
#define CDLIMIT (1L<<11) /* default max write address */
#define NODEV (dev_t)(-1)
#define NBPSCTR 512 /* Bytes per disk sector. */
#define UBSIZE 512 /* unix block size. */
#define SCTRSHFT 9 /* Shift for BPSECT. */
#define lobyte(X) (((unsigned char *)&(X))[1])
#define hibyte(X) (((unsigned char *)&(X))[0])
#define loword(X) (((ushort_t *)&(X))[1])
#define hiword(X) (((ushort_t *)&(X))[0])
/* REMOTE -- whether machine is primary, secondary, or regular */
#define SYSNAME 9 /* # chars in system name */
#define PREMOTE 39
/*
* MAXPATHLEN defines the longest permissible path length,
* including the terminating null, after expanding symbolic links.
* MAXSYMLINKS defines the maximum number of symbolic links
* that may be expanded in a path name. It should be set high
* enough to allow all legitimate uses, but halt infinite loops
* reasonably quickly.
* MAXNAMELEN is the length (including the terminating null) of
* the longest permissible file (component) name.
*/
#define MAXPATHLEN 1024
#define MAXSYMLINKS 20
#define MAXNAMELEN 256
#ifndef NADDR
#define NADDR 13
#endif
/*
* The following are defined to be the same as
* defined in /usr/include/limits.h. They are
* needed for pipe and FIFO compatibility.
*/
#ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */
#define PIPE_BUF 5120
#endif /* PIPE_BUF */
#ifndef PIPE_MAX /* max # bytes written to a pipe in a write */
#define PIPE_MAX 5120
#endif /* PIPE_MAX */
#define PIPEBUF PIPE_BUF /* pipe buffer size */
#ifndef NBBY
#define NBBY 8 /* number of bits per byte */
#endif
/* macros replacing interleaving functions */
#define dkblock(bp) ((bp)->b_blkno)
#define dkunit(bp) (minor((bp)->b_dev) >> 3)
/*
* File system parameters and macros.
*
* The file system is made out of blocks of at most MAXBSIZE units,
* with smaller units (fragments) only in the last direct block.
* MAXBSIZE primarily determines the size of buffers in the buffer
* pool. It may be made larger without any effect on existing
* file systems; however making it smaller make make some file
* systems unmountable.
*
* Note that the blocked devices are assumed to have DEV_BSIZE
* "sectors" and that fragments must be some multiple of this size.
*/
#define MAXBSIZE 8192
#define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define MAXFRAG 8
#ifdef _LP64
#define MAXOFF_T 0x7fffffffffffffffl
#define MAXOFFSET_T 0x7fffffffffffffffll
#else
#define MAXOFF_T 0x7fffffff
#ifndef _LONGLONG_TYPE
#define MAXOFFSET_T 0x7fffffff
#else
#define MAXOFFSET_T 0x7fffffffffffffffLL
#endif
#endif /* _LP64 */
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned)(db) << DEV_BSHIFT)
/*
* PAGES* describes the logical page size used by the system.
*/
#define PAGESIZE (sysconf(_SC_PAGESIZE)) /* All the above, for logical */
#define PAGEOFFSET (PAGESIZE - 1)
#define PAGEMASK (~PAGEOFFSET)
/*
* Some random macros for units conversion.
*/
/*
* pages to bytes, and back (with and without rounding)
*/
#define ptob(x) ((x) * PAGESIZE)
#define btop(x) (((unsigned)(x)) / PAGESIZE)
#define btopr(x) ((((unsigned)(x) + PAGEOFFSET) / PAGESIZE))
/*
* Signals
*/
#include <sys/signal.h>
#include <sys/types.h>
/*
* bit map related macros
*/
#define setbit(a, i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
#define clrbit(a, i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
#define isset(a, i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
#define isclr(a, i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
/*
* Macros for fast min/max.
*/
#ifndef MIN
#define MIN(a, b) (((a) < (b))?(a):(b))
#endif
#ifndef MAX
#define MAX(a, b) (((a) > (b))?(a):(b))
#endif
#define howmany(x, y) (((x)+((y)-1))/(y))
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
/*
* Scale factor for scaled integers used to count
* %cpu time and load averages.
*/
#define FSHIFT 8 /* bits to right of fixed binary point */
#define FSCALE (1<<FSHIFT)
/*
* Maximum size of hostname recognized and stored in the kernel.
* Same as in /usr/include/netdb.h
*/
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_PARAM_H */