kern_xxx.c revision 116182 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)kern_xxx.c	8.2 (Berkeley) 11/14/93
34 */
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/sys/kern/kern_xxx.c 116182 2003-06-11 00:56:59Z obrien $");
38
39#include "opt_compat.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/sysproto.h>
44#include <sys/kernel.h>
45#include <sys/proc.h>
46#include <sys/lock.h>
47#include <sys/mutex.h>
48#include <sys/sysctl.h>
49#include <sys/utsname.h>
50
51
52#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
53
54#ifndef _SYS_SYSPROTO_H_
55struct gethostname_args {
56	char	*hostname;
57	u_int	len;
58};
59#endif
60/*
61 * MPSAFE
62 */
63/* ARGSUSED */
64int
65ogethostname(td, uap)
66	struct thread *td;
67	struct gethostname_args *uap;
68{
69	int name[2];
70	int error;
71	size_t len = uap->len;
72
73	name[0] = CTL_KERN;
74	name[1] = KERN_HOSTNAME;
75	mtx_lock(&Giant);
76	error = userland_sysctl(td, name, 2, uap->hostname, &len, 1, 0, 0, 0);
77	mtx_unlock(&Giant);
78	return(error);
79}
80
81#ifndef _SYS_SYSPROTO_H_
82struct sethostname_args {
83	char	*hostname;
84	u_int	len;
85};
86#endif
87/*
88 * MPSAFE
89 */
90/* ARGSUSED */
91int
92osethostname(td, uap)
93	struct thread *td;
94	register struct sethostname_args *uap;
95{
96	int name[2];
97	int error;
98
99	name[0] = CTL_KERN;
100	name[1] = KERN_HOSTNAME;
101	mtx_lock(&Giant);
102	if ((error = suser_cred(td->td_ucred, PRISON_ROOT)) == 0) {
103		error = userland_sysctl(td, name, 2, 0, 0, 0,
104		    uap->hostname, uap->len, 0);
105	}
106	mtx_unlock(&Giant);
107	return (error);
108}
109
110#ifndef _SYS_SYSPROTO_H_
111struct ogethostid_args {
112	int	dummy;
113};
114#endif
115/*
116 * MPSAFE
117 */
118/* ARGSUSED */
119int
120ogethostid(td, uap)
121	struct thread *td;
122	struct ogethostid_args *uap;
123{
124
125	*(long *)(td->td_retval) = hostid;
126	return (0);
127}
128#endif /* COMPAT_43 || COMPAT_SUNOS */
129
130#ifdef COMPAT_43
131#ifndef _SYS_SYSPROTO_H_
132struct osethostid_args {
133	long	hostid;
134};
135#endif
136/*
137 * MPSAFE
138 */
139/* ARGSUSED */
140int
141osethostid(td, uap)
142	struct thread *td;
143	struct osethostid_args *uap;
144{
145	int error;
146
147	mtx_lock(&Giant);
148	if ((error = suser(td)))
149		hostid = uap->hostid;
150	mtx_unlock(&Giant);
151	return (error);
152}
153
154/*
155 * MPSAFE
156 */
157int
158oquota(td, uap)
159	struct thread *td;
160	struct oquota_args *uap;
161{
162	return (ENOSYS);
163}
164#endif /* COMPAT_43 */
165
166/*
167 * This is the FreeBSD-1.1 compatable uname(2) interface.  These
168 * days it is done in libc as a wrapper around a bunch of sysctl's.
169 * This must maintain the old 1.1 binary ABI.
170 */
171#if SYS_NMLN != 32
172#error "FreeBSD-1.1 uname syscall has been broken"
173#endif
174#ifndef _SYS_SYSPROTO_H_
175struct uname_args {
176        struct utsname  *name;
177};
178#endif
179
180/*
181 * MPSAFE
182 */
183/* ARGSUSED */
184int
185uname(td, uap)
186	struct thread *td;
187	struct uname_args *uap;
188{
189	int name[2], error;
190	size_t len;
191	char *s, *us;
192
193	name[0] = CTL_KERN;
194	name[1] = KERN_OSTYPE;
195	len = sizeof (uap->name->sysname);
196	mtx_lock(&Giant);
197	error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
198		1, 0, 0, 0);
199	if (error)
200		goto done2;
201	subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
202
203	name[1] = KERN_HOSTNAME;
204	len = sizeof uap->name->nodename;
205	error = userland_sysctl(td, name, 2, uap->name->nodename, &len,
206		1, 0, 0, 0);
207	if (error)
208		goto done2;
209	subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
210
211	name[1] = KERN_OSRELEASE;
212	len = sizeof uap->name->release;
213	error = userland_sysctl(td, name, 2, uap->name->release, &len,
214		1, 0, 0, 0);
215	if (error)
216		goto done2;
217	subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
218
219/*
220	name = KERN_VERSION;
221	len = sizeof uap->name->version;
222	error = userland_sysctl(td, name, 2, uap->name->version, &len,
223		1, 0, 0, 0);
224	if (error)
225		goto done2;
226	subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
227*/
228
229/*
230 * this stupid hackery to make the version field look like FreeBSD 1.1
231 */
232	for(s = version; *s && *s != '#'; s++);
233
234	for(us = uap->name->version; *s && *s != ':'; s++) {
235		error = subyte( us++, *s);
236		if (error)
237			goto done2;
238	}
239	error = subyte( us++, 0);
240	if (error)
241		goto done2;
242
243	name[0] = CTL_HW;
244	name[1] = HW_MACHINE;
245	len = sizeof uap->name->machine;
246	error = userland_sysctl(td, name, 2, uap->name->machine, &len,
247		1, 0, 0, 0);
248	if (error)
249		goto done2;
250	subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
251done2:
252	mtx_unlock(&Giant);
253	return (error);
254}
255
256#ifndef _SYS_SYSPROTO_H_
257struct getdomainname_args {
258        char    *domainname;
259        int     len;
260};
261#endif
262
263/*
264 * MPSAFE
265 */
266/* ARGSUSED */
267int
268getdomainname(td, uap)
269        struct thread *td;
270        struct getdomainname_args *uap;
271{
272	int domainnamelen;
273	int error;
274
275	mtx_lock(&Giant);
276	domainnamelen = strlen(domainname) + 1;
277	if ((u_int)uap->len > domainnamelen + 1)
278		uap->len = domainnamelen + 1;
279	error = copyout(domainname, uap->domainname, uap->len);
280	mtx_unlock(&Giant);
281	return (error);
282}
283
284#ifndef _SYS_SYSPROTO_H_
285struct setdomainname_args {
286        char    *domainname;
287        int     len;
288};
289#endif
290
291/*
292 * MPSAFE
293 */
294/* ARGSUSED */
295int
296setdomainname(td, uap)
297        struct thread *td;
298        struct setdomainname_args *uap;
299{
300        int error, domainnamelen;
301
302	mtx_lock(&Giant);
303        if ((error = suser(td)))
304		goto done2;
305        if ((u_int)uap->len > sizeof (domainname) - 1) {
306		error = EINVAL;
307		goto done2;
308	}
309        domainnamelen = uap->len;
310        error = copyin(uap->domainname, domainname, uap->len);
311        domainname[domainnamelen] = 0;
312done2:
313	mtx_unlock(&Giant);
314        return (error);
315}
316
317