1/*-
2 * Copyright (c) 1982, 1986, 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)kern_xxx.c	8.2 (Berkeley) 11/14/93
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: stable/11/sys/kern/kern_xxx.c 331722 2018-03-29 02:50:57Z eadler $");
34
35#include "opt_compat.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/sysproto.h>
40#include <sys/kernel.h>
41#include <sys/priv.h>
42#include <sys/proc.h>
43#include <sys/lock.h>
44#include <sys/mutex.h>
45#include <sys/socket.h>
46#include <sys/sysctl.h>
47#include <sys/utsname.h>
48
49#include <vm/vm_param.h>
50
51#if defined(COMPAT_43)
52
53#ifndef _SYS_SYSPROTO_H_
54struct gethostname_args {
55	char	*hostname;
56	u_int	len;
57};
58#endif
59/* ARGSUSED */
60int
61ogethostname(struct thread *td, struct gethostname_args *uap)
62{
63	int name[2];
64	size_t len = uap->len;
65
66	name[0] = CTL_KERN;
67	name[1] = KERN_HOSTNAME;
68	return (userland_sysctl(td, name, 2, uap->hostname, &len,
69	    1, 0, 0, 0, 0));
70}
71
72#ifndef _SYS_SYSPROTO_H_
73struct sethostname_args {
74	char	*hostname;
75	u_int	len;
76};
77#endif
78/* ARGSUSED */
79int
80osethostname(struct thread *td, struct sethostname_args *uap)
81{
82	int name[2];
83
84	name[0] = CTL_KERN;
85	name[1] = KERN_HOSTNAME;
86	return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname,
87	    uap->len, 0, 0));
88}
89
90#ifndef _SYS_SYSPROTO_H_
91struct ogethostid_args {
92	int	dummy;
93};
94#endif
95/* ARGSUSED */
96int
97ogethostid(struct thread *td, struct ogethostid_args *uap)
98{
99	size_t len = sizeof(long);
100	int name[2];
101
102	name[0] = CTL_KERN;
103	name[1] = KERN_HOSTID;
104	return (kernel_sysctl(td, name, 2, (long *)td->td_retval, &len,
105	    NULL, 0, NULL, 0));
106}
107#endif /* COMPAT_43 */
108
109#ifdef COMPAT_43
110#ifndef _SYS_SYSPROTO_H_
111struct osethostid_args {
112	long	hostid;
113};
114#endif
115/* ARGSUSED */
116int
117osethostid(struct thread *td, struct osethostid_args *uap)
118{
119	int name[2];
120
121	name[0] = CTL_KERN;
122	name[1] = KERN_HOSTID;
123	return (kernel_sysctl(td, name, 2, NULL, NULL, &uap->hostid,
124	    sizeof(uap->hostid), NULL, 0));
125}
126
127int
128oquota(struct thread *td, struct oquota_args *uap)
129{
130
131	return (ENOSYS);
132}
133
134#define	KINFO_PROC		(0<<8)
135#define	KINFO_RT		(1<<8)
136#define	KINFO_VNODE		(2<<8)
137#define	KINFO_FILE		(3<<8)
138#define	KINFO_METER		(4<<8)
139#define	KINFO_LOADAVG		(5<<8)
140#define	KINFO_CLOCKRATE		(6<<8)
141
142/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
143#define	KINFO_BSDI_SYSINFO	(101<<8)
144
145/*
146 * XXX this is bloat, but I hope it's better here than on the potentially
147 * limited kernel stack...  -Peter
148 */
149
150static struct {
151	int	bsdi_machine;		/* "i386" on BSD/386 */
152/*      ^^^ this is an offset to the string, relative to the struct start */
153	char	*pad0;
154	long	pad1;
155	long	pad2;
156	long	pad3;
157	u_long	pad4;
158	u_long	pad5;
159	u_long	pad6;
160
161	int	bsdi_ostype;		/* "BSD/386" on BSD/386 */
162	int	bsdi_osrelease;		/* "1.1" on BSD/386 */
163	long	pad7;
164	long	pad8;
165	char	*pad9;
166
167	long	pad10;
168	long	pad11;
169	int	pad12;
170	long	pad13;
171	quad_t	pad14;
172	long	pad15;
173
174	struct	timeval pad16;
175	/* we dont set this, because BSDI's uname used gethostname() instead */
176	int	bsdi_hostname;		/* hostname on BSD/386 */
177
178	/* the actual string data is appended here */
179
180} bsdi_si;
181
182/*
183 * this data is appended to the end of the bsdi_si structure during copyout.
184 * The "char *" offsets are relative to the base of the bsdi_si struct.
185 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
186 * should not exceed the length of the buffer here... (or else!! :-)
187 */
188static char bsdi_strings[80];	/* It had better be less than this! */
189
190#ifndef _SYS_SYSPROTO_H_
191struct getkerninfo_args {
192	int	op;
193	char	*where;
194	size_t	*size;
195	int	arg;
196};
197#endif
198int
199ogetkerninfo(struct thread *td, struct getkerninfo_args *uap)
200{
201	int error, name[6];
202	size_t size;
203	u_int needed = 0;
204
205	switch (uap->op & 0xff00) {
206
207	case KINFO_RT:
208		name[0] = CTL_NET;
209		name[1] = PF_ROUTE;
210		name[2] = 0;
211		name[3] = (uap->op & 0xff0000) >> 16;
212		name[4] = uap->op & 0xff;
213		name[5] = uap->arg;
214		error = userland_sysctl(td, name, 6, uap->where, uap->size,
215			0, 0, 0, &size, 0);
216		break;
217
218	case KINFO_VNODE:
219		name[0] = CTL_KERN;
220		name[1] = KERN_VNODE;
221		error = userland_sysctl(td, name, 2, uap->where, uap->size,
222			0, 0, 0, &size, 0);
223		break;
224
225	case KINFO_PROC:
226		name[0] = CTL_KERN;
227		name[1] = KERN_PROC;
228		name[2] = uap->op & 0xff;
229		name[3] = uap->arg;
230		error = userland_sysctl(td, name, 4, uap->where, uap->size,
231			0, 0, 0, &size, 0);
232		break;
233
234	case KINFO_FILE:
235		name[0] = CTL_KERN;
236		name[1] = KERN_FILE;
237		error = userland_sysctl(td, name, 2, uap->where, uap->size,
238			0, 0, 0, &size, 0);
239		break;
240
241	case KINFO_METER:
242		name[0] = CTL_VM;
243		name[1] = VM_TOTAL;
244		error = userland_sysctl(td, name, 2, uap->where, uap->size,
245			0, 0, 0, &size, 0);
246		break;
247
248	case KINFO_LOADAVG:
249		name[0] = CTL_VM;
250		name[1] = VM_LOADAVG;
251		error = userland_sysctl(td, name, 2, uap->where, uap->size,
252			0, 0, 0, &size, 0);
253		break;
254
255	case KINFO_CLOCKRATE:
256		name[0] = CTL_KERN;
257		name[1] = KERN_CLOCKRATE;
258		error = userland_sysctl(td, name, 2, uap->where, uap->size,
259			0, 0, 0, &size, 0);
260		break;
261
262	case KINFO_BSDI_SYSINFO: {
263		/*
264		 * this is pretty crude, but it's just enough for uname()
265		 * from BSDI's 1.x libc to work.
266		 *
267		 * *size gives the size of the buffer before the call, and
268		 * the amount of data copied after a successful call.
269		 * If successful, the return value is the amount of data
270		 * available, which can be larger than *size.
271		 *
272		 * BSDI's 2.x product apparently fails with ENOMEM if *size
273		 * is too small.
274		 */
275
276		u_int left;
277		char *s;
278
279		bzero((char *)&bsdi_si, sizeof(bsdi_si));
280		bzero(bsdi_strings, sizeof(bsdi_strings));
281
282		s = bsdi_strings;
283
284		bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
285		strcpy(s, ostype);
286		s += strlen(s) + 1;
287
288		bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
289		strcpy(s, osrelease);
290		s += strlen(s) + 1;
291
292		bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
293		strcpy(s, machine);
294		s += strlen(s) + 1;
295
296		needed = sizeof(bsdi_si) + (s - bsdi_strings);
297
298		if ((uap->where == NULL) || (uap->size == NULL)) {
299			/* process is asking how much buffer to supply.. */
300			size = needed;
301			error = 0;
302			break;
303		}
304
305		if ((error = copyin(uap->size, &size, sizeof(size))) != 0)
306			break;
307
308		/* if too much buffer supplied, trim it down */
309		if (size > needed)
310			size = needed;
311
312		/* how much of the buffer is remaining */
313		left = size;
314
315		if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
316			break;
317
318		/* is there any point in continuing? */
319		if (left > sizeof(bsdi_si)) {
320			left -= sizeof(bsdi_si);
321			error = copyout(&bsdi_strings,
322					uap->where + sizeof(bsdi_si), left);
323		}
324		break;
325	}
326
327	default:
328		error = EOPNOTSUPP;
329		break;
330	}
331	if (error == 0) {
332		td->td_retval[0] = needed ? needed : size;
333		if (uap->size) {
334			error = copyout(&size, uap->size, sizeof(size));
335		}
336	}
337	return (error);
338}
339#endif /* COMPAT_43 */
340
341#ifdef COMPAT_FREEBSD4
342/*
343 * This is the FreeBSD-1.1 compatible uname(2) interface.  These days it is
344 * done in libc as a wrapper around a bunch of sysctl's.  This must maintain
345 * the old 1.1 binary ABI.
346 */
347#if SYS_NMLN != 32
348#error "FreeBSD-1.1 uname syscall has been broken"
349#endif
350#ifndef _SYS_SYSPROTO_H_
351struct uname_args {
352	struct utsname  *name;
353};
354#endif
355/* ARGSUSED */
356int
357freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap)
358{
359	int name[2], error;
360	size_t len;
361	char *s, *us;
362
363	name[0] = CTL_KERN;
364	name[1] = KERN_OSTYPE;
365	len = sizeof (uap->name->sysname);
366	error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
367		1, 0, 0, 0, 0);
368	if (error)
369		return (error);
370	subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
371
372	name[1] = KERN_HOSTNAME;
373	len = sizeof uap->name->nodename;
374	error = userland_sysctl(td, name, 2, uap->name->nodename, &len,
375		1, 0, 0, 0, 0);
376	if (error)
377		return (error);
378	subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
379
380	name[1] = KERN_OSRELEASE;
381	len = sizeof uap->name->release;
382	error = userland_sysctl(td, name, 2, uap->name->release, &len,
383		1, 0, 0, 0, 0);
384	if (error)
385		return (error);
386	subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
387
388/*
389	name = KERN_VERSION;
390	len = sizeof uap->name->version;
391	error = userland_sysctl(td, name, 2, uap->name->version, &len,
392		1, 0, 0, 0, 0);
393	if (error)
394		return (error);
395	subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
396*/
397
398/*
399 * this stupid hackery to make the version field look like FreeBSD 1.1
400 */
401	for(s = version; *s && *s != '#'; s++);
402
403	for(us = uap->name->version; *s && *s != ':'; s++) {
404		error = subyte( us++, *s);
405		if (error)
406			return (error);
407	}
408	error = subyte( us++, 0);
409	if (error)
410		return (error);
411
412	name[0] = CTL_HW;
413	name[1] = HW_MACHINE;
414	len = sizeof uap->name->machine;
415	error = userland_sysctl(td, name, 2, uap->name->machine, &len,
416		1, 0, 0, 0, 0);
417	if (error)
418		return (error);
419	subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
420	return (0);
421}
422
423#ifndef _SYS_SYSPROTO_H_
424struct getdomainname_args {
425	char    *domainname;
426	int     len;
427};
428#endif
429/* ARGSUSED */
430int
431freebsd4_getdomainname(struct thread *td,
432    struct freebsd4_getdomainname_args *uap)
433{
434	int name[2];
435	size_t len = uap->len;
436
437	name[0] = CTL_KERN;
438	name[1] = KERN_NISDOMAINNAME;
439	return (userland_sysctl(td, name, 2, uap->domainname, &len,
440	    1, 0, 0, 0, 0));
441}
442
443#ifndef _SYS_SYSPROTO_H_
444struct setdomainname_args {
445	char    *domainname;
446	int     len;
447};
448#endif
449/* ARGSUSED */
450int
451freebsd4_setdomainname(struct thread *td,
452    struct freebsd4_setdomainname_args *uap)
453{
454	int name[2];
455
456	name[0] = CTL_KERN;
457	name[1] = KERN_NISDOMAINNAME;
458	return (userland_sysctl(td, name, 2, 0, 0, 0, uap->domainname,
459	    uap->len, 0, 0));
460}
461#endif /* COMPAT_FREEBSD4 */
462