kern_xxx.c revision 136404 
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: head/sys/kern/kern_xxx.c 136404 2004-10-11 22:04:16Z peter $");
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/proc.h>
42#include <sys/lock.h>
43#include <sys/mutex.h>
44#include <sys/sysctl.h>
45#include <sys/utsname.h>
46
47
48#if defined(COMPAT_43)
49
50#ifndef _SYS_SYSPROTO_H_
51struct gethostname_args {
52	char	*hostname;
53	u_int	len;
54};
55#endif
56/*
57 * MPSAFE
58 */
59/* ARGSUSED */
60int
61ogethostname(td, uap)
62	struct thread *td;
63	struct gethostname_args *uap;
64{
65	int name[2];
66	int error;
67	size_t len = uap->len;
68
69	name[0] = CTL_KERN;
70	name[1] = KERN_HOSTNAME;
71	mtx_lock(&Giant);
72	error = userland_sysctl(td, name, 2, uap->hostname, &len, 1, 0, 0, 0);
73	mtx_unlock(&Giant);
74	return(error);
75}
76
77#ifndef _SYS_SYSPROTO_H_
78struct sethostname_args {
79	char	*hostname;
80	u_int	len;
81};
82#endif
83/*
84 * MPSAFE
85 */
86/* ARGSUSED */
87int
88osethostname(td, uap)
89	struct thread *td;
90	register struct sethostname_args *uap;
91{
92	int name[2];
93	int error;
94
95	name[0] = CTL_KERN;
96	name[1] = KERN_HOSTNAME;
97	mtx_lock(&Giant);
98	if ((error = suser_cred(td->td_ucred, SUSER_ALLOWJAIL)) == 0) {
99		error = userland_sysctl(td, name, 2, 0, 0, 0,
100		    uap->hostname, uap->len, 0);
101	}
102	mtx_unlock(&Giant);
103	return (error);
104}
105
106#ifndef _SYS_SYSPROTO_H_
107struct ogethostid_args {
108	int	dummy;
109};
110#endif
111/*
112 * MPSAFE
113 */
114/* ARGSUSED */
115int
116ogethostid(td, uap)
117	struct thread *td;
118	struct ogethostid_args *uap;
119{
120
121	*(long *)(td->td_retval) = hostid;
122	return (0);
123}
124#endif /* COMPAT_43 */
125
126#ifdef COMPAT_43
127#ifndef _SYS_SYSPROTO_H_
128struct osethostid_args {
129	long	hostid;
130};
131#endif
132/*
133 * MPSAFE
134 */
135/* ARGSUSED */
136int
137osethostid(td, uap)
138	struct thread *td;
139	struct osethostid_args *uap;
140{
141	int error;
142
143	if ((error = suser(td)))
144		return (error);
145	mtx_lock(&Giant);
146	hostid = uap->hostid;
147	mtx_unlock(&Giant);
148	return (0);
149}
150
151/*
152 * MPSAFE
153 */
154int
155oquota(td, uap)
156	struct thread *td;
157	struct oquota_args *uap;
158{
159	return (ENOSYS);
160}
161#endif /* COMPAT_43 */
162
163/*
164 * This is the FreeBSD-1.1 compatable uname(2) interface.  These
165 * days it is done in libc as a wrapper around a bunch of sysctl's.
166 * This must maintain the old 1.1 binary ABI.
167 */
168#if SYS_NMLN != 32
169#error "FreeBSD-1.1 uname syscall has been broken"
170#endif
171#ifndef _SYS_SYSPROTO_H_
172struct uname_args {
173        struct utsname  *name;
174};
175#endif
176
177/*
178 * MPSAFE
179 */
180/* ARGSUSED */
181int
182uname(td, uap)
183	struct thread *td;
184	struct uname_args *uap;
185{
186	int name[2], error;
187	size_t len;
188	char *s, *us;
189
190	name[0] = CTL_KERN;
191	name[1] = KERN_OSTYPE;
192	len = sizeof (uap->name->sysname);
193	mtx_lock(&Giant);
194	error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
195		1, 0, 0, 0, 0);
196	if (error)
197		goto done2;
198	subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
199
200	name[1] = KERN_HOSTNAME;
201	len = sizeof uap->name->nodename;
202	error = userland_sysctl(td, name, 2, uap->name->nodename, &len,
203		1, 0, 0, 0, 0);
204	if (error)
205		goto done2;
206	subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
207
208	name[1] = KERN_OSRELEASE;
209	len = sizeof uap->name->release;
210	error = userland_sysctl(td, name, 2, uap->name->release, &len,
211		1, 0, 0, 0, 0);
212	if (error)
213		goto done2;
214	subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
215
216/*
217	name = KERN_VERSION;
218	len = sizeof uap->name->version;
219	error = userland_sysctl(td, name, 2, uap->name->version, &len,
220		1, 0, 0, 0, 0);
221	if (error)
222		goto done2;
223	subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
224*/
225
226/*
227 * this stupid hackery to make the version field look like FreeBSD 1.1
228 */
229	for(s = version; *s && *s != '#'; s++);
230
231	for(us = uap->name->version; *s && *s != ':'; s++) {
232		error = subyte( us++, *s);
233		if (error)
234			goto done2;
235	}
236	error = subyte( us++, 0);
237	if (error)
238		goto done2;
239
240	name[0] = CTL_HW;
241	name[1] = HW_MACHINE;
242	len = sizeof uap->name->machine;
243	error = userland_sysctl(td, name, 2, uap->name->machine, &len,
244		1, 0, 0, 0, 0);
245	if (error)
246		goto done2;
247	subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
248done2:
249	mtx_unlock(&Giant);
250	return (error);
251}
252
253#ifndef _SYS_SYSPROTO_H_
254struct getdomainname_args {
255        char    *domainname;
256        int     len;
257};
258#endif
259
260/*
261 * MPSAFE
262 */
263/* ARGSUSED */
264int
265getdomainname(td, uap)
266        struct thread *td;
267        struct getdomainname_args *uap;
268{
269	int domainnamelen;
270	int error;
271
272	mtx_lock(&Giant);
273	domainnamelen = strlen(domainname) + 1;
274	if ((u_int)uap->len > domainnamelen)
275		uap->len = domainnamelen;
276	error = copyout(domainname, uap->domainname, uap->len);
277	mtx_unlock(&Giant);
278	return (error);
279}
280
281#ifndef _SYS_SYSPROTO_H_
282struct setdomainname_args {
283        char    *domainname;
284        int     len;
285};
286#endif
287
288/*
289 * MPSAFE
290 */
291/* ARGSUSED */
292int
293setdomainname(td, uap)
294        struct thread *td;
295        struct setdomainname_args *uap;
296{
297        int error, domainnamelen;
298
299	mtx_lock(&Giant);
300        if ((error = suser(td)))
301		goto done2;
302        if ((u_int)uap->len > sizeof (domainname) - 1) {
303		error = EINVAL;
304		goto done2;
305	}
306        domainnamelen = uap->len;
307        error = copyin(uap->domainname, domainname, uap->len);
308        domainname[domainnamelen] = 0;
309done2:
310	mtx_unlock(&Giant);
311        return (error);
312}
313
314