259 lines
7.0 KiB
C
Executable File
259 lines
7.0 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)param.h 1.2 92/05/10 SMI" /* SVr4.0 1.3 */
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/*******************************************************************
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PROPRIETARY NOTICE (Combined)
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This source code is unpublished proprietary information
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constituting, or derived under license from AT&T's UNIX(r) System V.
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In addition, portions of such source code were derived from Berkeley
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4.3 BSD under license from the Regents of the University of
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California.
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Copyright Notice
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Notice of copyright on this source code product does not indicate
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publication.
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(c) 1986,1987,1988,1989 Sun Microsystems, Inc
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(c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
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All rights reserved.
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********************************************************************/
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#ifndef _SYS_PARAM_H
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#define _SYS_PARAM_H
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/*
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* Fundamental variables; don't change too often.
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*
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* This file is included here for compatibility with
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* SunOS, but it does *not* include all the values
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* define in the SunOS version of this file.
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*/
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#include <limits.h>
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#include <unistd.h>
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#ifndef MAX_INPUT
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#define MAX_INPUT 512 /* Maximum bytes stored in the input queue */
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#endif
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#ifndef MAX_CANON
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#define MAX_CANON 256 /* Maximum bytes for canoical processing */
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#endif
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#define UID_NOBODY 60001
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#define GID_NOBODY 60001
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#define UID_NOACCESS 60002 /* user ID no access */
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#define MAXPID 30000 /* max process id */
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#define MAXUID 60002 /* max user id */
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#define MAXLINK 32767 /* max links */
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#define NMOUNT 40 /* est. of # mountable fs for quota calc */
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/* The values below are defined in limits.h */
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#define NOFILE OPEN_MAX /* max open files per process */
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#define CANBSIZ 256 /* max size of typewriter line */
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#define HZ ((int)sysconf(_SC_CLK_TCK)) /* ticks/second of the clock */
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#define TICK (1000000000/((int)sysconf(_SC_CLK_TCK)))
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#define NCARGS 0x100000 /* # characters in exec arglist */
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/* must be multiple of NBPW. */
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/*
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* These define the maximum and minimum allowable values of the
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* configurable parameter NGROUPS_MAX.
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*/
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#define NGROUPS_UMAX 32
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#define NGROUPS_UMIN 8
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#define NGROUPS NGROUPS_MAX /* max number groups, from limits.h */
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#define NOGROUP -1 /* marker for empty group set member */
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/*
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* Priorities. Should not be altered too much.
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*/
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#define PMASK 0177
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#define PCATCH 0400
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#define PNOSTOP 01000
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#define PSWP 0
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#define PINOD 10
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#define PSNDD PINOD
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#define PAMAP PINOD
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#define PPMAP PINOD
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#define PRIBIO 20
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#define PZERO 25
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#define PMEM 0
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#define NZERO 20
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#define PPIPE 26
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#define PVFS 27
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#define PWAIT 30
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#define PLOCK 35
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#define PSLEP 39
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#define PUSER 60
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#define PIDLE 127
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/*
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* Fundamental constants of the implementation--cannot be changed easily.
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*/
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#define NBPS 0x20000 /* Number of bytes per segment */
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#define NBPW sizeof(int) /* number of bytes in an integer */
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#define NULL 0
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#define CMASK 0 /* default mask for file creation */
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#define CDLIMIT (1L<<11) /* default max write address */
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#define NODEV (dev_t)(-1)
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#define NBPSCTR 512 /* Bytes per disk sector. */
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#define UBSIZE 512 /* unix block size. */
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#define SCTRSHFT 9 /* Shift for BPSECT. */
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#define lobyte(X) (((unsigned char *)&(X))[1])
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#define hibyte(X) (((unsigned char *)&(X))[0])
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#define loword(X) (((ushort *)&(X))[1])
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#define hiword(X) (((ushort *)&(X))[0])
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/* REMOTE -- whether machine is primary, secondary, or regular */
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#define SYSNAME 9 /* # chars in system name */
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#define PREMOTE 39
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/*
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* MAXPATHLEN defines the longest permissible path length,
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* including the terminating null, after expanding symbolic links.
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* MAXSYMLINKS defines the maximum number of symbolic links
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* that may be expanded in a path name. It should be set high
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* enough to allow all legitimate uses, but halt infinite loops
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* reasonably quickly.
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* MAXNAMELEN is the length (including the terminating null) of
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* the longest permissible file (component) name.
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*/
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#define MAXPATHLEN 1024
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#define MAXSYMLINKS 20
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#define MAXNAMELEN 256
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#ifndef NADDR
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#define NADDR 13
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#endif
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/*
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* The following are defined to be the same as
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* defined in /usr/include/limits.h. They are
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* needed for pipe and FIFO compatibility.
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*/
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#ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */
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#define PIPE_BUF 5120
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#endif /* PIPE_BUF */
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#ifndef PIPE_MAX /* max # bytes written to a pipe in a write */
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#define PIPE_MAX 5120
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#endif /* PIPE_MAX */
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#define PIPEBUF PIPE_BUF /* pipe buffer size */
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#define NBBY 8 /* number of bits per byte */
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/* macros replacing interleaving functions */
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#define dkblock(bp) ((bp)->b_blkno)
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#define dkunit(bp) (minor((bp)->b_dev) >> 3)
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/*
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* File system parameters and macros.
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*
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* The file system is made out of blocks of at most MAXBSIZE units,
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* with smaller units (fragments) only in the last direct block.
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* MAXBSIZE primarily determines the size of buffers in the buffer
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* pool. It may be made larger without any effect on existing
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* file systems; however making it smaller make make some file
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* systems unmountable.
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*
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* Note that the blocked devices are assumed to have DEV_BSIZE
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* "sectors" and that fragments must be some multiple of this size.
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*/
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#define MAXBSIZE 8192
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#define DEV_BSIZE 512
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define MAXFRAG 8
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#define MAXOFF_T ((off_t)(((u_long)1 << NBBY * sizeof (off_t) - 1) - 1))
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#define MAXOFFSET_T ((1LL << NBBY * sizeof (daddr_t) + DEV_BSHIFT - 1) - 1)
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#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
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((unsigned)(bytes) >> DEV_BSHIFT)
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#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
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((unsigned)(db) << DEV_BSHIFT)
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/*
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* PAGES* describes the logical page size used by the system.
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*/
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#define PAGESIZE (sysconf(_SC_PAGESIZE)) /* All the above, for logical */
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#define PAGEOFFSET (PAGESIZE - 1)
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#define PAGEMASK (~PAGEOFFSET)
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/*
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* Some random macros for units conversion.
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*/
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/*
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* pages to bytes, and back (with and without rounding)
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*/
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#define ptob(x) ((x) * PAGESIZE)
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#define btop(x) (((unsigned)(x)) / PAGESIZE)
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#define btopr(x) ((((unsigned)(x) + PAGEOFFSET) / PAGESIZE))
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/*
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* Signals
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*/
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#include <sys/signal.h>
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#include <sys/types.h>
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/*
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* bit map related macros
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*/
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#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
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#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
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#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
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#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
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/*
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* Macros for fast min/max.
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*/
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#ifndef MIN
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#define MIN(a,b) (((a)<(b))?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#endif
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#define howmany(x, y) (((x)+((y)-1))/(y))
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#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
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/*
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* Scale factor for scaled integers used to count
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* %cpu time and load averages.
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*/
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#define FSHIFT 8 /* bits to right of fixed binary point */
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#define FSCALE (1<<FSHIFT)
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/*
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* Maximum size of hostname recognized and stored in the kernel.
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* Same as in /usr/include/netdb.h
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*/
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 256
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#endif
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#endif /* _SYS_PARAM_H */
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