home *** CD-ROM | disk | FTP | other *** search
- /*-
- * Copyright (c) 1982, 1988, 1991, 1993
- * The Regents of the University of California. All rights reserved.
- * (c) UNIX System Laboratories, Inc.
- * All or some portions of this file are derived from material licensed
- * to the University of California by American Telephone and Telegraph
- * Co. or Unix System Laboratories, Inc. and are reproduced herein with
- * the permission of UNIX System Laboratories, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)systm.h 8.4 (Berkeley) 2/23/94
- */
-
- /*
- * The `securelevel' variable controls the security level of the system.
- * It can only be decreased by process 1 (/sbin/init).
- *
- * Security levels are as follows:
- * -1 permannently insecure mode - always run system in level 0 mode.
- * 0 insecure mode - immutable and append-only flags make be turned off.
- * All devices may be read or written subject to permission modes.
- * 1 secure mode - immutable and append-only flags may not be changed;
- * raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
- * read-only.
- * 2 highly secure mode - same as (1) plus raw disks are always
- * read-only whether mounted or not. This level precludes tampering
- * with filesystems by unmounting them, but also inhibits running
- * newfs while the system is secured.
- *
- * In normal operation, the system runs in level 0 mode while single user
- * and in level 1 mode while multiuser. If level 2 mode is desired while
- * running multiuser, it can be set in the multiuser startup script
- * (/etc/rc.local) using sysctl(1). If it is desired to run the system
- * in level 0 mode while multiuser, initialize the variable securelevel
- * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
- * zero as that would allow the vmunix binary to be patched to -1.
- * Without initialization, securelevel loads in the BSS area which only
- * comes into existence when the kernel is loaded and hence cannot be
- * patched by a stalking hacker.
- */
- extern int securelevel; /* system security level */
- extern const char *panicstr; /* panic message */
- extern char version[]; /* system version */
- extern char copyright[]; /* system copyright */
-
- extern int nblkdev; /* number of entries in bdevsw */
- extern int nchrdev; /* number of entries in cdevsw */
- extern int nswdev; /* number of swap devices */
- extern int nswap; /* size of swap space */
-
- extern int selwait; /* select timeout address */
-
- extern u_char curpriority; /* priority of current process */
-
- extern int maxmem; /* max memory per process */
- extern int physmem; /* physical memory */
-
- extern dev_t dumpdev; /* dump device */
- extern long dumplo; /* offset into dumpdev */
-
- extern dev_t rootdev; /* root device */
- extern struct vnode *rootvp; /* vnode equivalent to above */
-
- extern dev_t swapdev; /* swapping device */
- extern struct vnode *swapdev_vp;/* vnode equivalent to above */
-
- extern struct sysent { /* system call table */
- int sy_narg; /* number of arguments */
- int (*sy_call)(); /* implementing function */
- } sysent[];
-
- extern int boothowto; /* reboot flags, from console subsystem */
-
- /* casts to keep lint happy */
- #define insque(q,p) _insque((caddr_t)q,(caddr_t)p)
- #define remque(q) _remque((caddr_t)q)
-
- /*
- * General function declarations.
- */
- int nullop __P((void));
- int enodev __P((void));
- int enoioctl __P((void));
- int enxio __P((void));
- int eopnotsupp __P((void));
- int seltrue __P((dev_t dev, int which, struct proc *p));
- void *hashinit __P((int count, int type, u_long *hashmask));
-
- #ifdef __GNUC__
- volatile void panic __P((const char *, ...));
- #else
- void panic __P((const char *, ...));
- #endif
- void tablefull __P((const char *));
- void addlog __P((const char *, ...));
- void log __P((int, const char *, ...));
- void printf __P((const char *, ...));
- int sprintf __P((char *buf, const char *, ...));
- void ttyprintf __P((struct tty *, const char *, ...));
-
- void bcopy __P((const void *from, void *to, u_int len));
- void ovbcopy __P((const void *from, void *to, u_int len));
- void bzero __P((void *buf, u_int len));
-
- int copystr __P((void *kfaddr, void *kdaddr, u_int len, u_int *done));
- int copyinstr __P((void *udaddr, void *kaddr, u_int len, u_int *done));
- int copyoutstr __P((void *kaddr, void *udaddr, u_int len, u_int *done));
- int copyin __P((void *udaddr, void *kaddr, u_int len));
- int copyout __P((void *kaddr, void *udaddr, u_int len));
-
- int fubyte __P((void *base));
- #ifdef notdef
- int fuibyte __P((void *base));
- #endif
- int subyte __P((void *base, int byte));
- int suibyte __P((void *base, int byte));
- int fuword __P((void *base));
- int fuiword __P((void *base));
- int suword __P((void *base, int word));
- int suiword __P((void *base, int word));
-
- int hzto __P((struct timeval *tv));
- void timeout __P((void (*func)(void *), void *arg, int ticks));
- void untimeout __P((void (*func)(void *), void *arg));
- void realitexpire __P((void *));
-
- struct clockframe;
- void hardclock __P((struct clockframe *frame));
- void softclock __P((void));
- void statclock __P((struct clockframe *frame));
-
- void initclocks __P((void));
-
- void startprofclock __P((struct proc *));
- void stopprofclock __P((struct proc *));
- void setstatclockrate __P((int hzrate));
-
- #include <libkern/libkern.h>
-