2.9BSD/usr/include/sys/param.h

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#ifndef	_WHOAMI
#include	"whoami.h"
#endif
#ifndef	NSIG
#include	<signal.h>
#endif
#include	<sys/psw.h>
#include	<sys/types.h>
#include	<sys/iopage.h>

#ifdef	UNIBUS_MAP
#define	MAXMEM	(200*16)	/* max core per process - first # is Kb */
#else
#define	MAXMEM	(128*16)	/* max core per process - first # is Kb */
#endif
#define	MAXUPRC	20		/* max processes per user */
#define	SSIZE	20		/* initial stack size (*64 bytes) */
#define	SINCR	20		/* increment of stack (*64 bytes) */
#define	NOFILE	20		/* max open files per process */
#define	CANBSIZ	256		/* max size of typewriter line */
#define	MSGBUFS	128		/* Characters saved from error messages */
#define	NCARGS	5120		/* # characters in exec arglist */
#ifdef	UCB_METER
#define	MAXSLP	20		/* max time a process is considered sleeping */
#endif

/*
 * priorities
 * probably should not be
 * altered too much
 */
#ifdef	CGL_RTP
#define	PRTP	0
#define	PSWP	5
#else
#define	PSWP	0
#endif
#define	PINOD	10
#define	PRIBIO	20
#define	PZERO	25
#define	PPIPE	26
#define	PWAIT	30
#define	PSLEP	40
#define	PUSER	50

#define	NZERO	20

/*
 * fundamental constants of the implementation--
 * cannot be changed easily
 */

#define	NBPW	sizeof(int)	/* number of bytes in an integer */

#define	BSLOP	0		/* BSLOP can be 0 unless you have a TIU/Spider*/

#ifndef	UCB_NKB
#define	BSIZE	512		/* size of secondary block (bytes) */
#define	NINDIR	(BSIZE/sizeof(daddr_t))
#define	BMASK	0777		/* BSIZE-1 */
#define	BSHIFT	9		/* LOG2(BSIZE) */
#define	NMASK	0177		/* NINDIR-1 */
#define	NSHIFT	7		/* LOG2(NINDIR) */
#endif

#if	UCB_NKB == 1
#define	CLSIZE	2		/* number of blocks / cluster */
#define	BSIZE	1024		/* size of secondary block (bytes) */
#define	NINDIR	(BSIZE/sizeof(daddr_t))
#define	BMASK	01777		/* BSIZE-1 */
#define	BSHIFT	10		/* LOG2(BSIZE) */
#define	NMASK	0377		/* NINDIR-1 */
#define	NSHIFT	8		/* LOG2(NINDIR) */
#endif

#define	UBSIZE	512		/* block size visible to users */
#ifdef	UCB_QUOTAS
#define	QCOUNT	(BSIZE/UBSIZE)	/* BSIZE must always be a multiple of UBSIZE */
#endif

#ifndef	UCB_NET
#define	USIZE	16		/* size of user block (*64) */
#else
#define	USIZE	32		/* size of user block (*64) */
#endif
#define	NULL	0
#define	CMASK	0		/* default mask for file creation */
#define	NODEV	(dev_t)(-1)
#define	ROOTINO	((ino_t)2)	/* i number of all roots */
#define	SUPERB	((daddr_t)1)	/* block number of the super block */
#define	DIRSIZ	14		/* max characters per directory */

#define	NICINOD	100		/* number of superblock inodes */
#define	NICFREE	50		/* number of superblock free blocks */

#define	CBSIZE	14		/* number of chars in a clist block */
				/* CBSIZE+sizeof(int *) must be a power of 2 */
#define	CROUND	017		/* clist rounding: sizeof(int *) + CBSIZE - 1*/

#define	PGSIZE	512		/* bytes per addressable disk sector */
#define	PGSHIFT	9		/* LOG2(PGSIZE) */

/*
 * Some macros for units conversion
 */

/* Core clicks (64 bytes) to segments and vice versa */
#define	ctos(x)		(((x)+127)/128)
#define	stoc(x)		((x)*128)

/* Core clicks (64 bytes) to disk blocks */
#define	ctod(x)		(((x)+7)>>3)

/* I number to disk address */
#ifndef	UCB_NKB
#define	itod(x)		(daddr_t)((((unsigned)(x)+15)>>3))
#else
#define	itod(x)		((daddr_t)((((unsigned)(x)+2*INOPB-1)/INOPB)))
#endif

/* I number to disk offset */
#ifndef	UCB_NKB
#define	itoo(x)		(int)(((x)+15)&07)
#else
#define	itoo(x)		((int)(((x)+2*INOPB-1)%INOPB))
#endif

#if	UCB_NKB == 1
/* file system blocks to disk blocks and back */
#define	fsbtodb(b)	((daddr_t)((daddr_t)(b)<<1))
#define	dbtofsb(b)	((daddr_t)((daddr_t)(b)>>1))
#endif
#ifndef	UCB_NKB
#define	fsbtodb(b)	((daddr_t)(b))
#define	dbtofsb(b)	((daddr_t)(b))
#endif

#ifdef	UCB_NKB
/* round a number of clicks up to a whole cluster */
#define	clrnd(i)	(((i) + (CLSIZE-1)) & ~(CLSIZE-1))
#endif

/* clicks to bytes */
#define	ctob(x)		((x)<<6)

/* bytes to clicks */
#define	btoc(x)		((((unsigned)(x)+63)>>6))

/* low int of a long */
#define	loint(l)	((int) (l) & 0177777)

/* high int of a long */
#define	hiint(l)	((int) ((l) >> 16))

/*
 * Machine-dependent bits and macros
 */

/*
 * Treat PS as byte, to allow restoring value from mfps/movb
 * (see :splfix.*)
 */
#define	PS_LOBYTE	((char *) 0177776)
#define	splx(ops)	(*PS_LOBYTE = ((char) (ops)))

#ifndef	MIN
#define	MIN(a,b)	(((a)<(b))? (a):(b))
#endif
#define	MAX(a,b)	(((a)>(b))? (a):(b))

#ifdef	UCB_NET
/*
 * Return values from tsleep().
 */
#define	TS_OK	0	/* normal wakeup */
#define	TS_TIME	1	/* timed-out wakeup */
#define	TS_SIG	2	/* asynchronous signal wakeup */
#endif