4.4BSD/usr/include/sys/systm.h
/*-
* Copyright (c) 1982, 1988, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* 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 8.1 (Berkeley) 6/11/93
*/
/*
* 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 curpri; /* 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((void *from, void *to, u_int len));
void ovbcopy __P((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>