[unix-history] / usr / src / sys / kern / kern_sysctl.c

/*-
 * Copyright (c) 1982, 1986, 1989, 1993 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Karels at Berkeley Software Design, Inc.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)kern_sysctl.c	7.29 (Berkeley) %G%
 */

/*
 * sysctl system call.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>

#include <vm/vm.h>

#include <sys/kinfo_proc.h>

sysctlfn kern_sysctl;
sysctlfn hw_sysctl;
extern sysctlfn vm_sysctl;
extern sysctlfn fs_sysctl;
extern sysctlfn net_sysctl;
extern sysctlfn cpu_sysctl;

/*
 * Locking and stats
 */
static struct sysctl_lock {
	int	sl_lock;
	int	sl_want;
	int	sl_locked;
} memlock;

struct sysctl_args {
	int	*name;
	u_int	namelen;
	void	*old;
	u_int	*oldlenp;
	void	*new;
	u_int	newlen;
};

sysctl(p, uap, retval)
	struct proc *p;
	register struct sysctl_args *uap;
	int *retval;
{
	int error, dolock = 1;
	u_int savelen, oldlen = 0;
	sysctlfn *fn;
	int name[CTL_MAXNAME];

	if (uap->new != NULL && (error = suser(p->p_ucred, &p->p_acflag)))
		return (error);
	/*
	 * all top-level sysctl names are non-terminal
	 */
	if (uap->namelen > CTL_MAXNAME || uap->namelen < 2)
		return (EINVAL);
	if (error = copyin(uap->name, &name, uap->namelen * sizeof(int)))
		return (error);

	switch (name[0]) {
	case CTL_KERN:
		fn = kern_sysctl;
		if (name[2] != KERN_VNODE)	/* XXX */
			dolock = 0;
		break;
	case CTL_HW:
		fn = hw_sysctl;
		break;
	case CTL_VM:
		fn = vm_sysctl;
		break;
	case CTL_NET:
		fn = net_sysctl;
		break;
#ifdef notyet
	case CTL_FS:
		fn = fs_sysctl;
		break;
	case CTL_DEBUG:
		fn = debug_sysctl;
		break;
	case CTL_MACHDEP:
		fn = cpu_sysctl;
		break;
#endif
	default:
		return (EOPNOTSUPP);
	}

	if (uap->oldlenp &&
	    (error = copyin(uap->oldlenp, &oldlen, sizeof(oldlen))))
		return (error);
	if (uap->old != NULL) {
		if (!useracc(uap->old, oldlen, B_WRITE))
			return (EFAULT);
		while (memlock.sl_lock) {
			memlock.sl_want = 1;
			sleep((caddr_t)&memlock, PRIBIO+1);
			memlock.sl_locked++;
		}
		memlock.sl_lock = 1;
		if (dolock)
			vslock(uap->old, oldlen);
		savelen = oldlen;
	}
	error = (*fn)(name + 1, uap->namelen - 1, uap->old, &oldlen,
	    uap->new, uap->newlen, p);
	if (uap->old != NULL) {
		if (dolock)
			vsunlock(uap->old, savelen, B_WRITE);
		memlock.sl_lock = 0;
		if (memlock.sl_want) {
			memlock.sl_want = 0;
			wakeup((caddr_t)&memlock);
		}
	}
	if (error)
		return (error);
	if (uap->oldlenp)
		error = copyout(&oldlen, uap->oldlenp, sizeof(oldlen));
	*retval = oldlen;
	return (0);
}

/*
 * Attributes stored in the kernel.
 */
char hostname[MAXHOSTNAMELEN];
int hostnamelen;
long hostid;
int securelevel;

/*
 * kernel related system variables.
 */
kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
	int *name;
	u_int namelen;
	void *oldp;
	u_int *oldlenp;
	void *newp;
	u_int newlen;
	struct proc *p;
{
	int error, level;
	extern char ostype[], osrelease[], version[];

	/* all sysctl names at this level are terminal */
	if (namelen != 1 && name[0] != KERN_PROC)
		return (ENOTDIR);		/* overloaded */

	switch (name[0]) {
	case KERN_OSTYPE:
		return (sysctl_rdstring(oldp, oldlenp, newp, ostype));
	case KERN_OSRELEASE:
		return (sysctl_rdstring(oldp, oldlenp, newp, osrelease));
	case KERN_OSREV:
		return (sysctl_rdint(oldp, oldlenp, newp, BSD));
	case KERN_VERSION:
		return (sysctl_rdstring(oldp, oldlenp, newp, version));
	case KERN_POSIX1:
		return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION));
	case KERN_MAXPROC:
		return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc));
	case KERN_MAXFILES:
		return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles));
	case KERN_ARGMAX:
		return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX));
	case KERN_HOSTNAME:
		error = sysctl_string(oldp, oldlenp, newp, newlen, 
		    hostname, sizeof(hostname));
		if (!error)
			hostnamelen = newlen;
		return (error);
	case KERN_HOSTID:
		return (sysctl_int(oldp, oldlenp, newp, newlen, &hostid));
	case KERN_SECURELVL:
		level = securelevel;
		if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) ||
		    newp == NULL)
			return (error);
		if (level < securelevel && p->p_pid != 1)
			return (EPERM);
		securelevel = level;
		return (0);
	case KERN_CLOCKRATE:
		return (sysctl_clockrate(oldp, oldlenp));
	case KERN_FILE:
		return (sysctl_file(oldp, oldlenp));
	case KERN_VNODE:
		return (sysctl_vnode(oldp, oldlenp));
	case KERN_PROC:
		return (sysctl_doproc(name + 1, namelen - 1, oldp, oldlenp));
	default:
		return (EOPNOTSUPP);
	}
	/* NOTREACHED */
}

/*
 * hardware related system variables.
 */
hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
	int *name;
	u_int namelen;
	void *oldp;
	u_int *oldlenp;
	void *newp;
	u_int newlen;
	struct proc *p;
{
	extern char machine[], cpu_model[];

	/* all sysctl names at this level are terminal */
	if (namelen != 1)
		return (ENOTDIR);		/* overloaded */

	switch (name[0]) {
	case HW_MACHINE:
		return (sysctl_rdstring(oldp, oldlenp, newp, machine));
	case HW_MODEL:
		return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model));
	case HW_NCPU:
		return (sysctl_rdint(oldp, oldlenp, newp, 1));	/* XXX */
	case HW_CPUSPEED:
		return (sysctl_rdint(oldp, oldlenp, newp, cpuspeed));
	case HW_PHYSMEM:
		return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem)));
	case HW_USERMEM:
		return (sysctl_rdint(oldp, oldlenp, newp,
		    ctob(physmem - cnt.v_wire_count)));
	case HW_PAGESIZE:
		return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE));
	default:
		return (EOPNOTSUPP);
	}
	/* NOTREACHED */
}

/*
 * Validate parameters and get old / set new parameters
 * for an integer-valued sysctl function.
 */
sysctl_int(oldp, oldlenp, newp, newlen, valp)
	void *oldp;
	u_int *oldlenp;
	void *newp;
	u_int newlen;
	int *valp;
{
	int error = 0;

	if (oldp && *oldlenp < sizeof(int))
		return (ENOMEM);
	if (newp && newlen != sizeof(int))
		return (EINVAL);
	*oldlenp = sizeof(int);
	if (oldp)
		error = copyout(valp, oldp, sizeof(int));
	if (error == 0 && newp)
		error = copyin(newp, valp, sizeof(int));
	return (error);
}

/*
 * As above, but read-only.
 */
sysctl_rdint(oldp, oldlenp, newp, val)
	void *oldp;
	u_int *oldlenp;
	void *newp;
	int val;
{
	int error = 0;

	if (oldp && *oldlenp < sizeof(int))
		return (ENOMEM);
	if (newp)
		return (EPERM);
	*oldlenp = sizeof(int);
	if (oldp)
		error = copyout((caddr_t)&val, oldp, sizeof(int));
	return (error);
}

/*
 * Validate parameters and get old / set new parameters
 * for a string-valued sysctl function.
 */
sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen)
	void *oldp;
	u_int *oldlenp;
	void *newp;
	u_int newlen;
	char *str;
	int maxlen;
{
	int len, error = 0;

	len = strlen(str) + 1;
	if (oldp && *oldlenp < len)
		return (ENOMEM);
	if (newp && newlen >= maxlen)
		return (EINVAL);
	if (oldp) {
		*oldlenp = len;
		error = copyout(str, oldp, len);
	}
	if (error == 0 && newp) {
		error = copyin(newp, str, newlen);
		str[newlen] = 0;
	}
	return (error);
}

/*
 * As above, but read-only.
 */
sysctl_rdstring(oldp, oldlenp, newp, str)
	void *oldp;
	u_int *oldlenp;
	void *newp;
	char *str;
{
	int len, error = 0;

	len = strlen(str) + 1;
	if (oldp && *oldlenp < len)
		return (ENOMEM);
	if (newp)
		return (EPERM);
	*oldlenp = len;
	if (oldp)
		error = copyout(str, oldp, len);
	return (error);
}

/*
 * Validate parameters and get old parameters
 * for a structure oriented sysctl function.
 */
sysctl_rdstruct(oldp, oldlenp, newp, sp, len)
	void *oldp;
	u_int *oldlenp;
	void *newp;
	void *sp;
	int len;
{
	int error = 0;

	if (oldp && *oldlenp < len)
		return (ENOMEM);
	if (newp)
		return (EPERM);
	*oldlenp = len;
	if (oldp)
		error = copyout(sp, oldp, len);
	return (error);
}

/*
 * Get file structures.
 */
sysctl_file(where, sizep)
	char *where;
	int *sizep;
{
	int buflen, error;
	struct file *fp;
	char *start = where;

	buflen = *sizep;
	if (where == NULL) {
		/*
		 * overestimate by 10 files
		 */
		*sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file);
		return (0);
	}

	/*
	 * first copyout filehead
	 */
	if (buflen < sizeof(filehead)) {
		*sizep = 0;
		return (0);
	}
	if (error = copyout((caddr_t)&filehead, where, sizeof(filehead)))
		return (error);
	buflen += sizeof(filehead);
	where += sizeof(filehead);

	/*
	 * followed by an array of file structures
	 */
	for (fp = filehead; fp != NULL; fp = fp->f_filef) {
		if (buflen < sizeof(struct file)) {
			*sizep = where - start;
			return (ENOMEM);
		}
		if (error = copyout((caddr_t)fp, where, sizeof (struct file)))
			return (error);
		buflen -= sizeof(struct file);
		where += sizeof(struct file);
	}
	*sizep = where - start;
	return (0);
}

/* 
 * try over estimating by 5 procs 
 */
#define KERN_PROCSLOP	(5 * sizeof (struct kinfo_proc))

sysctl_doproc(name, namelen, where, sizep)
	int *name;
	int namelen;
	char *where;
	int *sizep;
{
	register struct proc *p;
	register struct kinfo_proc *dp = (struct kinfo_proc *)where;
	register int needed = 0;
	int buflen = where != NULL ? *sizep : 0;
	int doingzomb;
	struct eproc eproc;
	int error = 0;

	if (namelen != 2)
		return (EINVAL);
	p = (struct proc *)allproc;
	doingzomb = 0;
again:
	for (; p != NULL; p = p->p_nxt) {
		/*
		 * Skip embryonic processes.
		 */
		if (p->p_stat == SIDL)
			continue;
		/* 
		 * TODO - make more efficient (see notes below).
		 * do by session. 
		 */
		switch (name[0]) {

		case KERN_PROC_PID:
			/* could do this with just a lookup */
			if (p->p_pid != (pid_t)name[1])
				continue;
			break;

		case KERN_PROC_PGRP:
			/* could do this by traversing pgrp */
			if (p->p_pgrp->pg_id != (pid_t)name[1])
				continue;
			break;

		case KERN_PROC_TTY:
			if ((p->p_flag&SCTTY) == 0 || 
			    p->p_session->s_ttyp == NULL ||
			    p->p_session->s_ttyp->t_dev != (dev_t)name[1])
				continue;
			break;

		case KERN_PROC_UID:
			if (p->p_ucred->cr_uid != (uid_t)name[1])
				continue;
			break;

		case KERN_PROC_RUID:
			if (p->p_cred->p_ruid != (uid_t)name[1])
				continue;
			break;
		}
		if (buflen >= sizeof(struct kinfo_proc)) {
			fill_eproc(p, &eproc);
			if (error = copyout((caddr_t)p, &dp->kp_proc, 
			    sizeof(struct proc)))
				return (error);
			if (error = copyout((caddr_t)&eproc, &dp->kp_eproc, 
			    sizeof(eproc)))
				return (error);
			dp++;
			buflen -= sizeof(struct kinfo_proc);
		}
		needed += sizeof(struct kinfo_proc);
	}
	if (doingzomb == 0) {
		p = zombproc;
		doingzomb++;
		goto again;
	}
	if (where != NULL) {
		*sizep = (caddr_t)dp - where;
		if (needed > *sizep)
			return (ENOMEM);
	} else {
		needed += KERN_PROCSLOP;
		*sizep = needed;
	}
	return (0);
}

/*
 * Fill in an eproc structure for the specified process.
 */
void
fill_eproc(p, ep)
	register struct proc *p;
	register struct eproc *ep;
{
	register struct tty *tp;

	ep->e_paddr = p;
	ep->e_sess = p->p_pgrp->pg_session;
	ep->e_pcred = *p->p_cred;
	ep->e_ucred = *p->p_ucred;
	if (p->p_stat == SIDL || p->p_stat == SZOMB) {
		ep->e_vm.vm_rssize = 0;
		ep->e_vm.vm_tsize = 0;
		ep->e_vm.vm_dsize = 0;
		ep->e_vm.vm_ssize = 0;
#ifndef sparc
		/* ep->e_vm.vm_pmap = XXX; */
#endif
	} else {
		register struct vmspace *vm = p->p_vmspace;

		ep->e_vm.vm_rssize = vm->vm_rssize;
		ep->e_vm.vm_tsize = vm->vm_tsize;
		ep->e_vm.vm_dsize = vm->vm_dsize;
		ep->e_vm.vm_ssize = vm->vm_ssize;
#ifndef sparc
		ep->e_vm.vm_pmap = vm->vm_pmap;
#endif
	}
	if (p->p_pptr)
		ep->e_ppid = p->p_pptr->p_pid;
	else
		ep->e_ppid = 0;
	ep->e_pgid = p->p_pgrp->pg_id;
	ep->e_jobc = p->p_pgrp->pg_jobc;
	if ((p->p_flag&SCTTY) && 
	     (tp = ep->e_sess->s_ttyp)) {
		ep->e_tdev = tp->t_dev;
		ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
		ep->e_tsess = tp->t_session;
	} else
		ep->e_tdev = NODEV;
	ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
	if (SESS_LEADER(p))
		ep->e_flag |= EPROC_SLEADER;
	if (p->p_wmesg)
		strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
	ep->e_xsize = ep->e_xrssize = 0;
	ep->e_xccount = ep->e_xswrss = 0;
}

#ifdef COMPAT_43
#include <sys/socket.h>
#define	KINFO_PROC		(0<<8)
#define	KINFO_RT		(1<<8)
#define	KINFO_VNODE		(2<<8)
#define	KINFO_FILE		(3<<8)
#define	KINFO_METER		(4<<8)
#define	KINFO_LOADAVG		(5<<8)
#define	KINFO_CLOCKRATE		(6<<8)

struct getkerninfo_args {
	int	op;
	char	*where;
	int	*size;
	int	arg;
};

getkerninfo(p, uap, retval)
	struct proc *p;
	register struct getkerninfo_args *uap;
	int *retval;
{
	int error, name[5];
	u_int size;

	if (error = copyin((caddr_t)uap->size, (caddr_t)&size, sizeof(size)))
		return (error);

	switch (uap->op & 0xff00) {

	case KINFO_RT:
		name[0] = PF_ROUTE;
		name[1] = 0;
		name[2] = (uap->op & 0xff0000) >> 16;
		name[3] = uap->op & 0xff;
		name[4] = uap->arg;
		error = net_sysctl(name, 5, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_VNODE:
		name[0] = KERN_VNODE;
		error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_PROC:
		name[0] = KERN_PROC;
		name[1] = uap->op & 0xff;
		name[2] = uap->arg;
		error = kern_sysctl(name, 3, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_FILE:
		name[0] = KERN_FILE;
		error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_METER:
		name[0] = VM_METER;
		error = vm_sysctl(name, 1, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_LOADAVG:
		name[0] = VM_LOADAVG;
		error = vm_sysctl(name, 1, uap->where, &size, NULL, 0, p);
		break;

	case KINFO_CLOCKRATE:
		name[0] = KERN_CLOCKRATE;
		error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
		break;

	default:
		return (EOPNOTSUPP);
	}
	if (error)
		return (error);
	*retval = size;
	return (copyout((caddr_t)&size, (caddr_t)uap->size, sizeof(size)));
}
#endif /* COMPAT_43 */
Commit	Line	Data
780d91b3 KM	1	/*-
780d91b3 KM	2	* Copyright (c) 1982, 1986, 1989, 1993 Regents of the University of California.
4a24f1b0 MT	3	* All rights reserved.
4a24f1b0 MT	4	*
780d91b3 KM	5	* This code is derived from software contributed to Berkeley by
	6	* Mike Karels at Berkeley Software Design, Inc.
	7	*
dbf0c423	8	* %sccs.include.redist.c%
4a24f1b0	9	*
0f1d36b0	10	* @(#)kern_sysctl.c 7.29 (Berkeley) %G%
780d91b3 KM	11	*/
	12
	13	/*
	14	* sysctl system call.
4a24f1b0 MT	15	*/
4a24f1b0 MT	16
38a01dbe	17	#include <sys/param.h>
780d91b3 KM	18	#include <sys/systm.h>
780d91b3 KM	19	#include <sys/malloc.h>
38a01dbe	20	#include <sys/proc.h>
780d91b3 KM	21	#include <sys/file.h>
	22	#include <sys/sysctl.h>
	23	#include <sys/unistd.h>
	24	#include <sys/buf.h>
38a01dbe KB	25	#include <sys/ioctl.h>
38a01dbe KB	26	#include <sys/tty.h>
4a24f1b0	27
38a01dbe	28	#include <vm/vm.h>
32041eb1	29
38a01dbe	30	#include <sys/kinfo_proc.h>
32041eb1	31
780d91b3 KM	32	sysctlfn kern_sysctl;
	33	sysctlfn hw_sysctl;
	34	extern sysctlfn vm_sysctl;
	35	extern sysctlfn fs_sysctl;
	36	extern sysctlfn net_sysctl;
	37	extern sysctlfn cpu_sysctl;
0a4df682	38
780d91b3 KM	39	/*
	40	* Locking and stats
	41	*/
	42	static struct sysctl_lock {
	43	int sl_lock;
	44	int sl_want;
	45	int sl_locked;
	46	} memlock;
	47
	48	struct sysctl_args {
	49	int *name;
	50	u_int namelen;
	51	void *old;
	52	u_int *oldlenp;
	53	void *new;
	54	u_int newlen;
9e97623a	55	};
780d91b3	56
780d91b3	57	sysctl(p, uap, retval)
8b24ca5d	58	struct proc *p;
780d91b3	59	register struct sysctl_args *uap;
8b24ca5d KM	60	int *retval;
8b24ca5d KM	61	{
780d91b3 KM	62	int error, dolock = 1;
	63	u_int savelen, oldlen = 0;
	64	sysctlfn *fn;
	65	int name[CTL_MAXNAME];
0a4df682	66
780d91b3 KM	67	if (uap->new != NULL && (error = suser(p->p_ucred, &p->p_acflag)))
	68	return (error);
	69	/*
	70	* all top-level sysctl names are non-terminal
	71	*/
	72	if (uap->namelen > CTL_MAXNAME \|\| uap->namelen < 2)
	73	return (EINVAL);
	74	if (error = copyin(uap->name, &name, uap->namelen * sizeof(int)))
	75	return (error);
	76
	77	switch (name[0]) {
	78	case CTL_KERN:
	79	fn = kern_sysctl;
	80	if (name[2] != KERN_VNODE) /* XXX */
	81	dolock = 0;
0a4df682	82	break;
780d91b3 KM	83	case CTL_HW:
780d91b3 KM	84	fn = hw_sysctl;
4a24f1b0	85	break;
780d91b3 KM	86	case CTL_VM:
780d91b3 KM	87	fn = vm_sysctl;
452737be	88	break;
780d91b3 KM	89	case CTL_NET:
780d91b3 KM	90	fn = net_sysctl;
318784c4	91	break;
780d91b3 KM	92	#ifdef notyet
	93	case CTL_FS:
	94	fn = fs_sysctl;
15415c71	95	break;
780d91b3 KM	96	case CTL_DEBUG:
780d91b3 KM	97	fn = debug_sysctl;
61ece7fc	98	break;
780d91b3 KM	99	case CTL_MACHDEP:
780d91b3 KM	100	fn = cpu_sysctl;
61ece7fc	101	break;
780d91b3	102	#endif
4a24f1b0	103	default:
780d91b3	104	return (EOPNOTSUPP);
7acc8d38	105	}
780d91b3 KM	106
	107	if (uap->oldlenp &&
	108	(error = copyin(uap->oldlenp, &oldlen, sizeof(oldlen))))
	109	return (error);
	110	if (uap->old != NULL) {
	111	if (!useracc(uap->old, oldlen, B_WRITE))
	112	return (EFAULT);
	113	while (memlock.sl_lock) {
	114	memlock.sl_want = 1;
	115	sleep((caddr_t)&memlock, PRIBIO+1);
	116	memlock.sl_locked++;
	117	}
	118	memlock.sl_lock = 1;
	119	if (dolock)
	120	vslock(uap->old, oldlen);
	121	savelen = oldlen;
2ed8b3ea	122	}
780d91b3	123	error = (*fn)(name + 1, uap->namelen - 1, uap->old, &oldlen,
0f1d36b0	124	uap->new, uap->newlen, p);
780d91b3 KM	125	if (uap->old != NULL) {
	126	if (dolock)
	127	vsunlock(uap->old, savelen, B_WRITE);
	128	memlock.sl_lock = 0;
	129	if (memlock.sl_want) {
	130	memlock.sl_want = 0;
	131	wakeup((caddr_t)&memlock);
	132	}
4a24f1b0	133	}
780d91b3 KM	134	if (error)
	135	return (error);
	136	if (uap->oldlenp)
	137	error = copyout(&oldlen, uap->oldlenp, sizeof(oldlen));
	138	*retval = oldlen;
	139	return (0);
	140	}
	141
	142	/*
	143	* Attributes stored in the kernel.
	144	*/
	145	char hostname[MAXHOSTNAMELEN];
	146	int hostnamelen;
	147	long hostid;
0f1d36b0	148	int securelevel;
780d91b3	149
0f1d36b0 KM	150	/*
	151	* kernel related system variables.
	152	*/
	153	kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
780d91b3 KM	154	int *name;
	155	u_int namelen;
	156	void *oldp;
	157	u_int *oldlenp;
	158	void *newp;
	159	u_int newlen;
0f1d36b0	160	struct proc *p;
780d91b3	161	{
0f1d36b0	162	int error, level;
780d91b3 KM	163	extern char ostype[], osrelease[], version[];
	164
	165	/* all sysctl names at this level are terminal */
	166	if (namelen != 1 && name[0] != KERN_PROC)
	167	return (ENOTDIR); /* overloaded */
	168
	169	switch (name[0]) {
	170	case KERN_OSTYPE:
	171	return (sysctl_rdstring(oldp, oldlenp, newp, ostype));
	172	case KERN_OSRELEASE:
	173	return (sysctl_rdstring(oldp, oldlenp, newp, osrelease));
	174	case KERN_OSREV:
	175	return (sysctl_rdint(oldp, oldlenp, newp, BSD));
	176	case KERN_VERSION:
	177	return (sysctl_rdstring(oldp, oldlenp, newp, version));
	178	case KERN_POSIX1:
	179	return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION));
	180	case KERN_MAXPROC:
	181	return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc));
	182	case KERN_MAXFILES:
	183	return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles));
	184	case KERN_ARGMAX:
	185	return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX));
	186	case KERN_HOSTNAME:
	187	error = sysctl_string(oldp, oldlenp, newp, newlen,
	188	hostname, sizeof(hostname));
	189	if (!error)
	190	hostnamelen = newlen;
	191	return (error);
	192	case KERN_HOSTID:
	193	return (sysctl_int(oldp, oldlenp, newp, newlen, &hostid));
0f1d36b0 KM	194	case KERN_SECURELVL:
	195	level = securelevel;
	196	if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) \|\|
	197	newp == NULL)
	198	return (error);
	199	if (level < securelevel && p->p_pid != 1)
	200	return (EPERM);
	201	securelevel = level;
	202	return (0);
780d91b3 KM	203	case KERN_CLOCKRATE:
	204	return (sysctl_clockrate(oldp, oldlenp));
	205	case KERN_FILE:
	206	return (sysctl_file(oldp, oldlenp));
	207	case KERN_VNODE:
	208	return (sysctl_vnode(oldp, oldlenp));
	209	case KERN_PROC:
	210	return (sysctl_doproc(name + 1, namelen - 1, oldp, oldlenp));
	211	default:
	212	return (EOPNOTSUPP);
	213	}
	214	/* NOTREACHED */
	215	}
	216
0f1d36b0 KM	217	/*
	218	* hardware related system variables.
	219	*/
	220	hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
780d91b3 KM	221	int *name;
	222	u_int namelen;
	223	void *oldp;
	224	u_int *oldlenp;
	225	void *newp;
	226	u_int newlen;
0f1d36b0	227	struct proc *p;
780d91b3 KM	228	{
	229	extern char machine[], cpu_model[];
	230
	231	/* all sysctl names at this level are terminal */
	232	if (namelen != 1)
	233	return (ENOTDIR); /* overloaded */
	234
	235	switch (name[0]) {
	236	case HW_MACHINE:
	237	return (sysctl_rdstring(oldp, oldlenp, newp, machine));
	238	case HW_MODEL:
	239	return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model));
	240	case HW_NCPU:
	241	return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */
	242	case HW_CPUSPEED:
	243	return (sysctl_rdint(oldp, oldlenp, newp, cpuspeed));
	244	case HW_PHYSMEM:
	245	return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem)));
	246	case HW_USERMEM:
	247	return (sysctl_rdint(oldp, oldlenp, newp,
	248	ctob(physmem - cnt.v_wire_count)));
	249	case HW_PAGESIZE:
	250	return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE));
	251	default:
	252	return (EOPNOTSUPP);
	253	}
	254	/* NOTREACHED */
	255	}
	256
	257	/*
	258	* Validate parameters and get old / set new parameters
	259	* for an integer-valued sysctl function.
	260	*/
	261	sysctl_int(oldp, oldlenp, newp, newlen, valp)
	262	void *oldp;
	263	u_int *oldlenp;
	264	void *newp;
	265	u_int newlen;
	266	int *valp;
	267	{
	268	int error = 0;
	269
	270	if (oldp && *oldlenp < sizeof(int))
	271	return (ENOMEM);
	272	if (newp && newlen != sizeof(int))
	273	return (EINVAL);
	274	*oldlenp = sizeof(int);
	275	if (oldp)
	276	error = copyout(valp, oldp, sizeof(int));
	277	if (error == 0 && newp)
	278	error = copyin(newp, valp, sizeof(int));
	279	return (error);
	280	}
	281
	282	/*
	283	* As above, but read-only.
	284	*/
	285	sysctl_rdint(oldp, oldlenp, newp, val)
	286	void *oldp;
	287	u_int *oldlenp;
	288	void *newp;
	289	int val;
	290	{
	291	int error = 0;
292
293	if (oldp && *oldlenp < sizeof(int))
294	return (ENOMEM);
295	if (newp)
296	return (EPERM);
297	*oldlenp = sizeof(int);
298	if (oldp)
299	error = copyout((caddr_t)&val, oldp, sizeof(int));
300	return (error);
301	}
302
303	/*
304	* Validate parameters and get old / set new parameters
305	* for a string-valued sysctl function.
306	*/
307	sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen)
308	void *oldp;
309	u_int *oldlenp;
310	void *newp;
311	u_int newlen;
312	char *str;
313	int maxlen;
314	{
315	int len, error = 0;
316
317	len = strlen(str) + 1;
318	if (oldp && *oldlenp < len)
319	return (ENOMEM);
320	if (newp && newlen >= maxlen)
321	return (EINVAL);
924ae1bd RC	322	if (oldp) {
924ae1bd RC	323	*oldlenp = len;
780d91b3	324	error = copyout(str, oldp, len);
924ae1bd	325	}
780d91b3 KM	326	if (error == 0 && newp) {
	327	error = copyin(newp, str, newlen);
	328	str[newlen] = 0;
13bbbe63	329	}
8b24ca5d	330	return (error);
4a24f1b0 MT	331	}
4a24f1b0 MT	332
780d91b3 KM	333	/*
	334	* As above, but read-only.
	335	*/
	336	sysctl_rdstring(oldp, oldlenp, newp, str)
	337	void *oldp;
	338	u_int *oldlenp;
	339	void *newp;
	340	char *str;
	341	{
	342	int len, error = 0;
	343
	344	len = strlen(str) + 1;
	345	if (oldp && *oldlenp < len)
	346	return (ENOMEM);
	347	if (newp)
	348	return (EPERM);
	349	*oldlenp = len;
	350	if (oldp)
	351	error = copyout(str, oldp, len);
	352	return (error);
	353	}
	354
	355	/*
	356	* Validate parameters and get old parameters
	357	* for a structure oriented sysctl function.
	358	*/
	359	sysctl_rdstruct(oldp, oldlenp, newp, sp, len)
	360	void *oldp;
	361	u_int *oldlenp;
	362	void *newp;
	363	void *sp;
	364	int len;
	365	{
	366	int error = 0;
	367
	368	if (oldp && *oldlenp < len)
	369	return (ENOMEM);
	370	if (newp)
	371	return (EPERM);
	372	*oldlenp = len;
	373	if (oldp)
	374	error = copyout(sp, oldp, len);
	375	return (error);
	376	}
	377
	378	/*
	379	* Get file structures.
	380	*/
	381	sysctl_file(where, sizep)
	382	char *where;
	383	int *sizep;
	384	{
	385	int buflen, error;
	386	struct file *fp;
	387	char *start = where;
	388
	389	buflen = *sizep;
	390	if (where == NULL) {
	391	/*
	392	* overestimate by 10 files
	393	*/
	394	sizep = sizeof(filehead) + (nfiles + 10) sizeof(struct file);
	395	return (0);
	396	}
397
398	/*
399	* first copyout filehead
400	*/
401	if (buflen < sizeof(filehead)) {
402	*sizep = 0;
403	return (0);
404	}
405	if (error = copyout((caddr_t)&filehead, where, sizeof(filehead)))
406	return (error);
407	buflen += sizeof(filehead);
408	where += sizeof(filehead);
409
410	/*
411	* followed by an array of file structures
412	*/
413	for (fp = filehead; fp != NULL; fp = fp->f_filef) {
414	if (buflen < sizeof(struct file)) {
415	*sizep = where - start;
416	return (ENOMEM);
417	}
418	if (error = copyout((caddr_t)fp, where, sizeof (struct file)))
419	return (error);
420	buflen -= sizeof(struct file);
421	where += sizeof(struct file);
422	}
423	*sizep = where - start;
424	return (0);
425	}
426
4a24f1b0 MT	427	/*
	428	* try over estimating by 5 procs
	429	*/
780d91b3	430	#define KERN_PROCSLOP (5 * sizeof (struct kinfo_proc))
4a24f1b0	431
780d91b3 KM	432	sysctl_doproc(name, namelen, where, sizep)
	433	int *name;
	434	int namelen;
4a24f1b0	435	char *where;
780d91b3	436	int *sizep;
4a24f1b0 MT	437	{
4a24f1b0 MT	438	register struct proc *p;
a65b44f0	439	register struct kinfo_proc dp = (struct kinfo_proc )where;
780d91b3 KM	440	register int needed = 0;
780d91b3 KM	441	int buflen = where != NULL ? *sizep : 0;
4a24f1b0	442	int doingzomb;
7747bd3b	443	struct eproc eproc;
4a24f1b0 MT	444	int error = 0;
4a24f1b0 MT	445
780d91b3 KM	446	if (namelen != 2)
780d91b3 KM	447	return (EINVAL);
80a8e5e6	448	p = (struct proc *)allproc;
4a24f1b0 MT	449	doingzomb = 0;
	450	again:
	451	for (; p != NULL; p = p->p_nxt) {
02ea4076 KM	452	/*
	453	* Skip embryonic processes.
	454	*/
	455	if (p->p_stat == SIDL)
	456	continue;
4a24f1b0 MT	457	/*
	458	* TODO - make more efficient (see notes below).
	459	* do by session.
	460	*/
780d91b3	461	switch (name[0]) {
4a24f1b0	462
780d91b3	463	case KERN_PROC_PID:
4a24f1b0	464	/* could do this with just a lookup */
780d91b3	465	if (p->p_pid != (pid_t)name[1])
4a24f1b0 MT	466	continue;
	467	break;
	468
780d91b3	469	case KERN_PROC_PGRP:
4a24f1b0	470	/* could do this by traversing pgrp */
780d91b3	471	if (p->p_pgrp->pg_id != (pid_t)name[1])
4a24f1b0 MT	472	continue;
	473	break;
	474
780d91b3	475	case KERN_PROC_TTY:
4a24f1b0 MT	476	if ((p->p_flag&SCTTY) == 0 \|\|
4a24f1b0 MT	477	p->p_session->s_ttyp == NULL \|\|
780d91b3	478	p->p_session->s_ttyp->t_dev != (dev_t)name[1])
4a24f1b0 MT	479	continue;
	480	break;
	481
780d91b3 KM	482	case KERN_PROC_UID:
780d91b3 KM	483	if (p->p_ucred->cr_uid != (uid_t)name[1])
4a24f1b0 MT	484	continue;
	485	break;
	486
780d91b3 KM	487	case KERN_PROC_RUID:
780d91b3 KM	488	if (p->p_cred->p_ruid != (uid_t)name[1])
4a24f1b0 MT	489	continue;
	490	break;
	491	}
780d91b3	492	if (buflen >= sizeof(struct kinfo_proc)) {
32041eb1	493	fill_eproc(p, &eproc);
a65b44f0	494	if (error = copyout((caddr_t)p, &dp->kp_proc,
780d91b3	495	sizeof(struct proc)))
4a24f1b0	496	return (error);
a65b44f0	497	if (error = copyout((caddr_t)&eproc, &dp->kp_eproc,
780d91b3	498	sizeof(eproc)))
4a24f1b0	499	return (error);
a65b44f0	500	dp++;
780d91b3	501	buflen -= sizeof(struct kinfo_proc);
4a24f1b0	502	}
780d91b3	503	needed += sizeof(struct kinfo_proc);
4a24f1b0 MT	504	}
	505	if (doingzomb == 0) {
	506	p = zombproc;
	507	doingzomb++;
	508	goto again;
	509	}
780d91b3 KM	510	if (where != NULL) {
	511	*sizep = (caddr_t)dp - where;
	512	if (needed > *sizep)
	513	return (ENOMEM);
	514	} else {
	515	needed += KERN_PROCSLOP;
	516	*sizep = needed;
	517	}
4a24f1b0 MT	518	return (0);
4a24f1b0 MT	519	}
32041eb1 MK	520
	521	/*
	522	* Fill in an eproc structure for the specified process.
	523	*/
	524	void
	525	fill_eproc(p, ep)
	526	register struct proc *p;
	527	register struct eproc *ep;
	528	{
	529	register struct tty *tp;
	530
	531	ep->e_paddr = p;
	532	ep->e_sess = p->p_pgrp->pg_session;
	533	ep->e_pcred = *p->p_cred;
	534	ep->e_ucred = *p->p_ucred;
13bbbe63 CT	535	if (p->p_stat == SIDL \|\| p->p_stat == SZOMB) {
	536	ep->e_vm.vm_rssize = 0;
	537	ep->e_vm.vm_tsize = 0;
	538	ep->e_vm.vm_dsize = 0;
	539	ep->e_vm.vm_ssize = 0;
	540	#ifndef sparc
	541	/* ep->e_vm.vm_pmap = XXX; */
	542	#endif
	543	} else {
	544	register struct vmspace *vm = p->p_vmspace;
	545
	546	ep->e_vm.vm_rssize = vm->vm_rssize;
	547	ep->e_vm.vm_tsize = vm->vm_tsize;
	548	ep->e_vm.vm_dsize = vm->vm_dsize;
	549	ep->e_vm.vm_ssize = vm->vm_ssize;
	550	#ifndef sparc
	551	ep->e_vm.vm_pmap = vm->vm_pmap;
	552	#endif
	553	}
31c481fa MK	554	if (p->p_pptr)
	555	ep->e_ppid = p->p_pptr->p_pid;
	556	else
	557	ep->e_ppid = 0;
32041eb1 MK	558	ep->e_pgid = p->p_pgrp->pg_id;
	559	ep->e_jobc = p->p_pgrp->pg_jobc;
	560	if ((p->p_flag&SCTTY) &&
	561	(tp = ep->e_sess->s_ttyp)) {
	562	ep->e_tdev = tp->t_dev;
51d82109	563	ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
32041eb1 MK	564	ep->e_tsess = tp->t_session;
	565	} else
	566	ep->e_tdev = NODEV;
	567	ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
	568	if (SESS_LEADER(p))
	569	ep->e_flag \|= EPROC_SLEADER;
	570	if (p->p_wmesg)
	571	strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
	572	ep->e_xsize = ep->e_xrssize = 0;
	573	ep->e_xccount = ep->e_xswrss = 0;
	574	}
318784c4	575
780d91b3	576	#ifdef COMPAT_43
780d91b3	577	#include <sys/socket.h>
1fa29dab KM	578	#define KINFO_PROC (0<<8)
	579	#define KINFO_RT (1<<8)
	580	#define KINFO_VNODE (2<<8)
	581	#define KINFO_FILE (3<<8)
	582	#define KINFO_METER (4<<8)
	583	#define KINFO_LOADAVG (5<<8)
	584	#define KINFO_CLOCKRATE (6<<8)
780d91b3 KM	585
	586	struct getkerninfo_args {
	587	int op;
	588	char *where;
	589	int *size;
	590	int arg;
	591	};
	592
	593	getkerninfo(p, uap, retval)
	594	struct proc *p;
	595	register struct getkerninfo_args *uap;
	596	int *retval;
318784c4	597	{
780d91b3 KM	598	int error, name[5];
780d91b3 KM	599	u_int size;
318784c4	600
780d91b3 KM	601	if (error = copyin((caddr_t)uap->size, (caddr_t)&size, sizeof(size)))
780d91b3 KM	602	return (error);
318784c4	603
1fa29dab	604	switch (uap->op & 0xff00) {
318784c4	605
780d91b3 KM	606	case KINFO_RT:
	607	name[0] = PF_ROUTE;
	608	name[1] = 0;
	609	name[2] = (uap->op & 0xff0000) >> 16;
	610	name[3] = uap->op & 0xff;
	611	name[4] = uap->arg;
0f1d36b0	612	error = net_sysctl(name, 5, uap->where, &size, NULL, 0, p);
780d91b3	613	break;
318784c4	614
780d91b3 KM	615	case KINFO_VNODE:
780d91b3 KM	616	name[0] = KERN_VNODE;
0f1d36b0	617	error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
780d91b3 KM	618	break;
	619
	620	case KINFO_PROC:
	621	name[0] = KERN_PROC;
	622	name[1] = uap->op & 0xff;
	623	name[2] = uap->arg;
0f1d36b0	624	error = kern_sysctl(name, 3, uap->where, &size, NULL, 0, p);
780d91b3 KM	625	break;
	626
	627	case KINFO_FILE:
	628	name[0] = KERN_FILE;
0f1d36b0	629	error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
780d91b3 KM	630	break;
	631
	632	case KINFO_METER:
	633	name[0] = VM_METER;
0f1d36b0	634	error = vm_sysctl(name, 1, uap->where, &size, NULL, 0, p);
780d91b3 KM	635	break;
	636
	637	case KINFO_LOADAVG:
	638	name[0] = VM_LOADAVG;
0f1d36b0	639	error = vm_sysctl(name, 1, uap->where, &size, NULL, 0, p);
780d91b3 KM	640	break;
	641
	642	case KINFO_CLOCKRATE:
	643	name[0] = KERN_CLOCKRATE;
0f1d36b0	644	error = kern_sysctl(name, 1, uap->where, &size, NULL, 0, p);
780d91b3 KM	645	break;
	646
	647	default:
0f1d36b0	648	return (EOPNOTSUPP);
780d91b3 KM	649	}
	650	if (error)
	651	return (error);
	652	*retval = size;
	653	return (copyout((caddr_t)&size, (caddr_t)uap->size, sizeof(size)));
318784c4	654	}
780d91b3	655	#endif /* COMPAT_43 */