Add original unix v6

sys/param.h

@@ -0,0 +1,91 @@
+/*
+ * tunable variables
+ */
+
+#define	NBUF	15		/* size of buffer cache */
+#define	NINODE	100		/* number of in core inodes */
+#define	NFILE	100		/* number of in core file structures */
+#define	NMOUNT	5		/* number of mountable file systems */
+#define	NEXEC	3		/* number of simultaneous exec's */
+#define	MAXMEM	(64*32)		/* max core per process - first # is Kw */
+#define	SSIZE	20		/* initial stack size (*64 bytes) */
+#define	SINCR	20		/* increment of stack (*64 bytes) */
+#define	NOFILE	15		/* max open files per process */
+#define	CANBSIZ	256		/* max size of typewriter line */
+#define	CMAPSIZ	100		/* size of core allocation area */
+#define	SMAPSIZ	100		/* size of swap allocation area */
+#define	NCALL	20		/* max simultaneous time callouts */
+#define	NPROC	50		/* max number of processes */
+#define	NTEXT	40		/* max number of pure texts */
+#define	NCLIST	100		/* max total clist size */
+#define	HZ	60		/* Ticks/second of the clock */
+
+/*
+ * priorities
+ * probably should not be
+ * altered too much
+ */
+
+#define	PSWP	-100
+#define	PINOD	-90
+#define	PRIBIO	-50
+#define	PPIPE	1
+#define	PWAIT	40
+#define	PSLEP	90
+#define	PUSER	100
+
+/*
+ * signals
+ * dont change
+ */
+
+#define	NSIG	20
+#define		SIGHUP	1	/* hangup */
+#define		SIGINT	2	/* interrupt (rubout) */
+#define		SIGQIT	3	/* quit (FS) */
+#define		SIGINS	4	/* illegal instruction */
+#define		SIGTRC	5	/* trace or breakpoint */
+#define		SIGIOT	6	/* iot */
+#define		SIGEMT	7	/* emt */
+#define		SIGFPT	8	/* floating exception */
+#define		SIGKIL	9	/* kill */
+#define		SIGBUS	10	/* bus error */
+#define		SIGSEG	11	/* segmentation violation */
+#define		SIGSYS	12	/* sys */
+#define		SIGPIPE	13	/* end of pipe */
+
+/*
+ * fundamental constants
+ * cannot be changed
+ */
+
+#define	USIZE	16		/* size of user block (*64) */
+#define	NULL	0
+#define	NODEV	(-1)
+#define	ROOTINO	1		/* i number of all roots */
+#define	DIRSIZ	14		/* max characters per directory */
+
+/*
+ * structure to access an
+ * integer in bytes
+ */
+struct
+{
+	char	lobyte;
+	char	hibyte;
+};
+
+/*
+ * structure to access an integer
+ */
+struct
+{
+	int	integ;
+};
+
+/*
+ * Certain processor registers
+ */
+#define PS	0177776
+#define KL	0177560
+#define SW	0177570