FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_xxx.c
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: releng/10.1/sys/kern/kern_xxx.c 193066 2009-05-29 21:27:12Z jamie $");
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_
54 struct gethostname_args {
55 char *hostname;
56 u_int len;
57 };
58 #endif
59 /* ARGSUSED */
60 int
61 ogethostname(td, uap)
62 struct thread *td;
63 struct gethostname_args *uap;
64 {
65 int name[2];
66 size_t len = uap->len;
67
68 name[0] = CTL_KERN;
69 name[1] = KERN_HOSTNAME;
70 return (userland_sysctl(td, name, 2, uap->hostname, &len,
71 1, 0, 0, 0, 0));
72 }
73
74 #ifndef _SYS_SYSPROTO_H_
75 struct sethostname_args {
76 char *hostname;
77 u_int len;
78 };
79 #endif
80 /* ARGSUSED */
81 int
82 osethostname(td, uap)
83 struct thread *td;
84 register struct sethostname_args *uap;
85 {
86 int name[2];
87
88 name[0] = CTL_KERN;
89 name[1] = KERN_HOSTNAME;
90 return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname,
91 uap->len, 0, 0));
92 }
93
94 #ifndef _SYS_SYSPROTO_H_
95 struct ogethostid_args {
96 int dummy;
97 };
98 #endif
99 /* ARGSUSED */
100 int
101 ogethostid(td, uap)
102 struct thread *td;
103 struct ogethostid_args *uap;
104 {
105 size_t len = sizeof(long);
106 int name[2];
107
108 name[0] = CTL_KERN;
109 name[1] = KERN_HOSTID;
110 return (kernel_sysctl(td, name, 2, (long *)td->td_retval, &len,
111 NULL, 0, NULL, 0));
112 }
113 #endif /* COMPAT_43 */
114
115 #ifdef COMPAT_43
116 #ifndef _SYS_SYSPROTO_H_
117 struct osethostid_args {
118 long hostid;
119 };
120 #endif
121 /* ARGSUSED */
122 int
123 osethostid(td, uap)
124 struct thread *td;
125 struct osethostid_args *uap;
126 {
127 int name[2];
128
129 name[0] = CTL_KERN;
130 name[1] = KERN_HOSTID;
131 return (kernel_sysctl(td, name, 2, NULL, NULL, &uap->hostid,
132 sizeof(uap->hostid), NULL, 0));
133 }
134
135 int
136 oquota(td, uap)
137 struct thread *td;
138 struct oquota_args *uap;
139 {
140
141 return (ENOSYS);
142 }
143
144 #define KINFO_PROC (0<<8)
145 #define KINFO_RT (1<<8)
146 #define KINFO_VNODE (2<<8)
147 #define KINFO_FILE (3<<8)
148 #define KINFO_METER (4<<8)
149 #define KINFO_LOADAVG (5<<8)
150 #define KINFO_CLOCKRATE (6<<8)
151
152 /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
153 #define KINFO_BSDI_SYSINFO (101<<8)
154
155 /*
156 * XXX this is bloat, but I hope it's better here than on the potentially
157 * limited kernel stack... -Peter
158 */
159
160 static struct {
161 int bsdi_machine; /* "i386" on BSD/386 */
162 /* ^^^ this is an offset to the string, relative to the struct start */
163 char *pad0;
164 long pad1;
165 long pad2;
166 long pad3;
167 u_long pad4;
168 u_long pad5;
169 u_long pad6;
170
171 int bsdi_ostype; /* "BSD/386" on BSD/386 */
172 int bsdi_osrelease; /* "1.1" on BSD/386 */
173 long pad7;
174 long pad8;
175 char *pad9;
176
177 long pad10;
178 long pad11;
179 int pad12;
180 long pad13;
181 quad_t pad14;
182 long pad15;
183
184 struct timeval pad16;
185 /* we dont set this, because BSDI's uname used gethostname() instead */
186 int bsdi_hostname; /* hostname on BSD/386 */
187
188 /* the actual string data is appended here */
189
190 } bsdi_si;
191
192 /*
193 * this data is appended to the end of the bsdi_si structure during copyout.
194 * The "char *" offsets are relative to the base of the bsdi_si struct.
195 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
196 * should not exceed the length of the buffer here... (or else!! :-)
197 */
198 static char bsdi_strings[80]; /* It had better be less than this! */
199
200 #ifndef _SYS_SYSPROTO_H_
201 struct getkerninfo_args {
202 int op;
203 char *where;
204 size_t *size;
205 int arg;
206 };
207 #endif
208 int
209 ogetkerninfo(struct thread *td, struct getkerninfo_args *uap)
210 {
211 int error, name[6];
212 size_t size;
213 u_int needed = 0;
214
215 switch (uap->op & 0xff00) {
216
217 case KINFO_RT:
218 name[0] = CTL_NET;
219 name[1] = PF_ROUTE;
220 name[2] = 0;
221 name[3] = (uap->op & 0xff0000) >> 16;
222 name[4] = uap->op & 0xff;
223 name[5] = uap->arg;
224 error = userland_sysctl(td, name, 6, uap->where, uap->size,
225 0, 0, 0, &size, 0);
226 break;
227
228 case KINFO_VNODE:
229 name[0] = CTL_KERN;
230 name[1] = KERN_VNODE;
231 error = userland_sysctl(td, name, 2, uap->where, uap->size,
232 0, 0, 0, &size, 0);
233 break;
234
235 case KINFO_PROC:
236 name[0] = CTL_KERN;
237 name[1] = KERN_PROC;
238 name[2] = uap->op & 0xff;
239 name[3] = uap->arg;
240 error = userland_sysctl(td, name, 4, uap->where, uap->size,
241 0, 0, 0, &size, 0);
242 break;
243
244 case KINFO_FILE:
245 name[0] = CTL_KERN;
246 name[1] = KERN_FILE;
247 error = userland_sysctl(td, name, 2, uap->where, uap->size,
248 0, 0, 0, &size, 0);
249 break;
250
251 case KINFO_METER:
252 name[0] = CTL_VM;
253 name[1] = VM_TOTAL;
254 error = userland_sysctl(td, name, 2, uap->where, uap->size,
255 0, 0, 0, &size, 0);
256 break;
257
258 case KINFO_LOADAVG:
259 name[0] = CTL_VM;
260 name[1] = VM_LOADAVG;
261 error = userland_sysctl(td, name, 2, uap->where, uap->size,
262 0, 0, 0, &size, 0);
263 break;
264
265 case KINFO_CLOCKRATE:
266 name[0] = CTL_KERN;
267 name[1] = KERN_CLOCKRATE;
268 error = userland_sysctl(td, name, 2, uap->where, uap->size,
269 0, 0, 0, &size, 0);
270 break;
271
272 case KINFO_BSDI_SYSINFO: {
273 /*
274 * this is pretty crude, but it's just enough for uname()
275 * from BSDI's 1.x libc to work.
276 *
277 * *size gives the size of the buffer before the call, and
278 * the amount of data copied after a successful call.
279 * If successful, the return value is the amount of data
280 * available, which can be larger than *size.
281 *
282 * BSDI's 2.x product apparently fails with ENOMEM if *size
283 * is too small.
284 */
285
286 u_int left;
287 char *s;
288
289 bzero((char *)&bsdi_si, sizeof(bsdi_si));
290 bzero(bsdi_strings, sizeof(bsdi_strings));
291
292 s = bsdi_strings;
293
294 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
295 strcpy(s, ostype);
296 s += strlen(s) + 1;
297
298 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
299 strcpy(s, osrelease);
300 s += strlen(s) + 1;
301
302 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
303 strcpy(s, machine);
304 s += strlen(s) + 1;
305
306 needed = sizeof(bsdi_si) + (s - bsdi_strings);
307
308 if ((uap->where == NULL) || (uap->size == NULL)) {
309 /* process is asking how much buffer to supply.. */
310 size = needed;
311 error = 0;
312 break;
313 }
314
315 if ((error = copyin(uap->size, &size, sizeof(size))) != 0)
316 break;
317
318 /* if too much buffer supplied, trim it down */
319 if (size > needed)
320 size = needed;
321
322 /* how much of the buffer is remaining */
323 left = size;
324
325 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
326 break;
327
328 /* is there any point in continuing? */
329 if (left > sizeof(bsdi_si)) {
330 left -= sizeof(bsdi_si);
331 error = copyout(&bsdi_strings,
332 uap->where + sizeof(bsdi_si), left);
333 }
334 break;
335 }
336
337 default:
338 error = EOPNOTSUPP;
339 break;
340 }
341 if (error == 0) {
342 td->td_retval[0] = needed ? needed : size;
343 if (uap->size) {
344 error = copyout(&size, uap->size, sizeof(size));
345 }
346 }
347 return (error);
348 }
349 #endif /* COMPAT_43 */
350
351 #ifdef COMPAT_FREEBSD4
352 /*
353 * This is the FreeBSD-1.1 compatible uname(2) interface. These days it is
354 * done in libc as a wrapper around a bunch of sysctl's. This must maintain
355 * the old 1.1 binary ABI.
356 */
357 #if SYS_NMLN != 32
358 #error "FreeBSD-1.1 uname syscall has been broken"
359 #endif
360 #ifndef _SYS_SYSPROTO_H_
361 struct uname_args {
362 struct utsname *name;
363 };
364 #endif
365 /* ARGSUSED */
366 int
367 freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap)
368 {
369 int name[2], error;
370 size_t len;
371 char *s, *us;
372
373 name[0] = CTL_KERN;
374 name[1] = KERN_OSTYPE;
375 len = sizeof (uap->name->sysname);
376 error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
377 1, 0, 0, 0, 0);
378 if (error)
379 return (error);
380 subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
381
382 name[1] = KERN_HOSTNAME;
383 len = sizeof uap->name->nodename;
384 error = userland_sysctl(td, name, 2, uap->name->nodename, &len,
385 1, 0, 0, 0, 0);
386 if (error)
387 return (error);
388 subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
389
390 name[1] = KERN_OSRELEASE;
391 len = sizeof uap->name->release;
392 error = userland_sysctl(td, name, 2, uap->name->release, &len,
393 1, 0, 0, 0, 0);
394 if (error)
395 return (error);
396 subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
397
398 /*
399 name = KERN_VERSION;
400 len = sizeof uap->name->version;
401 error = userland_sysctl(td, name, 2, uap->name->version, &len,
402 1, 0, 0, 0, 0);
403 if (error)
404 return (error);
405 subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
406 */
407
408 /*
409 * this stupid hackery to make the version field look like FreeBSD 1.1
410 */
411 for(s = version; *s && *s != '#'; s++);
412
413 for(us = uap->name->version; *s && *s != ':'; s++) {
414 error = subyte( us++, *s);
415 if (error)
416 return (error);
417 }
418 error = subyte( us++, 0);
419 if (error)
420 return (error);
421
422 name[0] = CTL_HW;
423 name[1] = HW_MACHINE;
424 len = sizeof uap->name->machine;
425 error = userland_sysctl(td, name, 2, uap->name->machine, &len,
426 1, 0, 0, 0, 0);
427 if (error)
428 return (error);
429 subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
430 return (0);
431 }
432
433 #ifndef _SYS_SYSPROTO_H_
434 struct getdomainname_args {
435 char *domainname;
436 int len;
437 };
438 #endif
439 /* ARGSUSED */
440 int
441 freebsd4_getdomainname(struct thread *td,
442 struct freebsd4_getdomainname_args *uap)
443 {
444 int name[2];
445 size_t len = uap->len;
446
447 name[0] = CTL_KERN;
448 name[1] = KERN_NISDOMAINNAME;
449 return (userland_sysctl(td, name, 2, uap->domainname, &len,
450 1, 0, 0, 0, 0));
451 }
452
453 #ifndef _SYS_SYSPROTO_H_
454 struct setdomainname_args {
455 char *domainname;
456 int len;
457 };
458 #endif
459 /* ARGSUSED */
460 int
461 freebsd4_setdomainname(struct thread *td,
462 struct freebsd4_setdomainname_args *uap)
463 {
464 int name[2];
465
466 name[0] = CTL_KERN;
467 name[1] = KERN_NISDOMAINNAME;
468 return (userland_sysctl(td, name, 2, 0, 0, 0, uap->domainname,
469 uap->len, 0, 0));
470 }
471 #endif /* COMPAT_FREEBSD4 */
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