/*- * 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 */ #include /* * 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)); typedef void (*timeout_func_t)(void *); 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