/* $NetBSD: systm.h,v 1.71 1997/10/19 02:29:20 mikel Exp $ */ /*- * 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 permanently insecure mode - always run system in level 0 mode. * 0 insecure mode - immutable and append-only flags may 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(8). 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. */ #ifndef _SYS_SYSTM_H_ #define _SYS_SYSTM_H_ struct device; struct proc; struct uio; struct tty; struct vnode; extern int securelevel; /* system security level */ extern const char *panicstr; /* panic message */ extern char version[]; /* system version */ extern char copyright[]; /* system copyright */ extern int autonicetime; /* time (in seconds) before autoniceval */ extern int autoniceval; /* proc priority after autonicetime */ 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 int dumpsize; /* size of dump in pages */ extern const char *dumpspec; /* how dump device was specified */ extern dev_t rootdev; /* root device */ extern struct vnode *rootvp; /* vnode equivalent to above */ extern struct device *root_device; /* device equivalent to above */ extern const char *rootspec; /* how root device was specified */ /* * These represent the swap pseudo-device (`sw'). This device * is used by the swap pager to indirect through the routines * in sys/vm/vm_swap.c. */ extern dev_t swapdev; /* swapping device */ extern struct vnode *swapdev_vp;/* vnode equivalent to above */ struct proc; struct tty; struct uio; extern struct sysent { /* system call table */ short sy_narg; /* number of args */ short sy_argsize; /* total size of arguments */ /* implementing function */ int (*sy_call) __P((struct proc *, void *, register_t *)); } sysent[]; extern int nsysent; #define SCARG(p,k) ((p)->k.datum) /* get arg from args pointer */ extern int boothowto; /* reboot flags, from console subsystem */ extern void (*v_putc) __P((int)); /* Virtual console putc routine */ extern void _insque __P((void *, void *)); extern void _remque __P((void *)); /* casts to keep lint happy, but it should be happy with void * */ #define insque(q,p) _insque(q, p) #define remque(q) _remque(q) /* * General function declarations. */ int nullop __P((void *)); int enodev __P((void)); int enosys __P((void)); int enoioctl __P((void)); int enxio __P((void)); int eopnotsupp __P((void)); #ifdef LKM int lkmenodev __P((void)); #endif int seltrue __P((dev_t dev, int events, struct proc *p)); void *hashinit __P((int count, int type, u_long *hashmask)); int sys_nosys __P((struct proc *, void *, register_t *)); void printf __P((const char *, ...)) __kprintf_attribute__((__format__(__kprintf__,1,2))); int sprintf __P((char *buf, const char *, ...)) __attribute__((__format__(__printf__,2,3))); #ifdef __powerpc__ /* XXX XXX XXX */ /* * Comment stolen from * * Don't use va_list in the vprintf() prototype. Va_list is typedef'd in two * places ( and ), so if we include one * of them here we may collide with the other includes. We instead get * _BSD_VA_LIST_ from and use it. */ #include #include void vprintf __P((const char *, _BSD_VA_LIST_)); #endif /* __powerpc__ */ /* XXX XXX XXX */ void panic __P((const char *, ...)) #ifdef __KPRINTF_ATTRIBUTE__ __kprintf_attribute__((__noreturn__,__format__(__kprintf__,1,2))); #else __attribute__((__noreturn__)); #endif void uprintf __P((const char *, ...)) __kprintf_attribute__((__format__(__kprintf__,1,2))); void ttyprintf __P((struct tty *, const char *, ...)) __kprintf_attribute__((__format__(__kprintf__,2,3))); char *bitmask_snprintf __P((u_long, const char *, char *, size_t)); void tablefull __P((const char *)); void bcopy __P((const void *, void *, size_t)); void ovbcopy __P((const void *, void *, size_t)); void bzero __P((void *, size_t)); int bcmp __P((const void *, const void *, size_t)); int memcmp __P((const void *, const void *, size_t)); void *memcpy __P((void *, const void *, size_t)); void *memmove __P((void *, const void *, size_t)); void *memset __P((void *, int, size_t)); #if 0 /* XXX not ready for this yet */ #define bcopy(s,t,n) memcpy(t,s,n) #define ovbcopy(s,t,n) memmove(t,s,n) #define bzero(s,n) memset(s,0,n) #define bcmp(s,t,n) memcmp(s,t,n) #endif int copystr __P((const void *, void *, size_t, size_t *)); int copyinstr __P((const void *, void *, size_t, size_t *)); int copyoutstr __P((const void *, void *, size_t, size_t *)); int copyin __P((const void *, void *, size_t)); int copyout __P((const void *, void *, size_t)); int subyte __P((void *, int)); int suibyte __P((void *, int)); int susword __P((void *, short)); int suisword __P((void *, short)); int suswintr __P((void *, short)); int suword __P((void *, long)); int suiword __P((void *, long)); int fubyte __P((const void *)); int fuibyte __P((const void *)); int fusword __P((const void *)); int fuisword __P((const void *)); int fuswintr __P((const void *)); long fuword __P((const void *)); long fuiword __P((const void *)); struct timeval; 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)); #ifdef NTP void hardupdate __P((long offset)); #ifdef PPS_SYNC void hardpps __P((struct timeval *, long)); #endif #endif void initclocks __P((void)); void inittodr __P((time_t)); void resettodr __P((void)); void cpu_initclocks __P((void)); void startprofclock __P((struct proc *)); void stopprofclock __P((struct proc *)); void setstatclockrate __P((int hzrate)); /* * Shutdown hooks. Functions to be run with all interrupts disabled * immediately before the system is halted or rebooted. */ void *shutdownhook_establish __P((void (*)(void *), void *)); void shutdownhook_disestablish __P((void *)); void doshutdownhooks __P((void)); /* * Mountroot hooks. Device drivers establish these to be executed * just before (*mountroot)() if the passed device is selected * as the root device. */ void *mountroothook_establish __P((void (*)(struct device *), struct device *)); void mountroothook_disestablish __P((void *)); void mountroothook_destroy __P((void)); void domountroothook __P((void)); int uiomove __P((void *, int, struct uio *)); int setjmp __P((label_t *)); void longjmp __P((label_t *)); void consinit __P((void)); void cpu_startup __P((void)); void cpu_rootconf __P((void)); void cpu_dumpconf __P((void)); void cpu_set_kpc __P((struct proc *, void (*)(struct proc *))); #ifdef GPROF void kmstartup __P((void)); #endif #ifdef _KERNEL #include #endif #ifdef DDB /* debugger entry points */ void Debugger __P((void)); /* in DDB only */ int read_symtab_from_file __P((struct proc *,struct vnode *,const char *)); extern int db_onpanic; #endif /* DDB */ #ifdef SYSCALL_DEBUG void scdebug_call __P((struct proc *, register_t, register_t[])); void scdebug_ret __P((struct proc *, register_t, int, register_t[])); #endif /* SYSCALL_DEBUG */ #endif /* !_SYS_SYSTM_H_ */