FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_mib.c
1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Mike Karels at Berkeley Software Design, Inc.
7 *
8 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
9 * project, to make these variables more userfriendly.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: releng/11.0/sys/kern/kern_mib.c 295941 2016-02-23 23:37:10Z bdrewery $");
40
41 #include "opt_compat.h"
42 #include "opt_posix.h"
43 #include "opt_config.h"
44
45 #include <sys/param.h>
46 #include <sys/jail.h>
47 #include <sys/kernel.h>
48 #include <sys/lock.h>
49 #include <sys/mutex.h>
50 #include <sys/proc.h>
51 #include <sys/random.h>
52 #include <sys/sbuf.h>
53 #include <sys/smp.h>
54 #include <sys/sx.h>
55 #include <sys/sysctl.h>
56 #include <sys/systm.h>
57 #include <sys/unistd.h>
58
59 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0,
60 "Sysctl internal magic");
61 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0,
62 "High kernel, proc, limits &c");
63 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0,
64 "Virtual memory");
65 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0,
66 "File system");
67 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0,
68 "Network, (see socket.h)");
69 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0,
70 "Debugging");
71 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
72 "Sizeof various things");
73 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0,
74 "hardware");
75 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
76 "machine dependent");
77 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0,
78 "user-level");
79 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
80 "p1003_1b, (see p1003_1b.h)");
81
82 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0,
83 "Compatibility code");
84 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0,
85 "Security");
86 #ifdef REGRESSION
87 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0,
88 "Regression test MIB");
89 #endif
90
91 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
92 kern_ident, 0, "Kernel identifier");
93
94 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
95 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
96
97 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
98 version, 0, "Kernel version");
99
100 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
101 compiler_version, 0, "Version of compiler used to compile kernel");
102
103 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
104 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
105
106 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
107 &maxproc, 0, "Maximum number of processes");
108
109 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
110 &maxprocperuid, 0, "Maximum processes allowed per userid");
111
112 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
113 &maxusers, 0, "Hint for kernel tuning");
114
115 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
116 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
117
118 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
119 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
120
121 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
122 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
123 "Maximum number of supplemental groups a user can belong to");
124
125 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
126 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
127
128 #ifdef _POSIX_SAVED_IDS
129 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
130 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
131 #else
132 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
133 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
134 #endif
135
136 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
137
138 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
139 kernelname, sizeof kernelname, "Name of kernel file booted");
140
141 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
142 &mp_ncpus, 0, "Number of active CPUs");
143
144 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
145 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
146
147 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
148 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
149
150 static int
151 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
152 {
153 char buf[256];
154 size_t len;
155
156 /*-
157 * This is one of the very few legitimate uses of read_random(9).
158 * Use of arc4random(9) is not recommended as that will ignore
159 * an unsafe (i.e. unseeded) random(4).
160 *
161 * If random(4) is not seeded, then this returns 0, so the
162 * sysctl will return a zero-length buffer.
163 */
164 len = read_random(buf, MIN(req->oldlen, sizeof(buf)));
165 return (SYSCTL_OUT(req, buf, len));
166 }
167
168 SYSCTL_PROC(_kern, KERN_ARND, arandom,
169 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
170 sysctl_kern_arnd, "", "arc4rand");
171
172 static int
173 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
174 {
175 u_long val;
176
177 val = ctob(physmem);
178 return (sysctl_handle_long(oidp, &val, 0, req));
179 }
180
181 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
182 0, 0, sysctl_hw_physmem, "LU", "");
183
184 static int
185 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
186 {
187 u_long val;
188 val = ctob(realmem);
189 return (sysctl_handle_long(oidp, &val, 0, req));
190 }
191 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
192 0, 0, sysctl_hw_realmem, "LU", "");
193 static int
194 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
195 {
196 u_long val;
197
198 val = ctob(physmem - vm_cnt.v_wire_count);
199 return (sysctl_handle_long(oidp, &val, 0, req));
200 }
201
202 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
203 0, 0, sysctl_hw_usermem, "LU", "");
204
205 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
206
207 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
208
209 static int
210 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
211 {
212 int error;
213 #ifdef SCTL_MASK32
214 int i;
215 uint32_t pagesizes32[MAXPAGESIZES];
216
217 if (req->flags & SCTL_MASK32) {
218 /*
219 * Recreate the "pagesizes" array with 32-bit elements. Truncate
220 * any page size greater than UINT32_MAX to zero.
221 */
222 for (i = 0; i < MAXPAGESIZES; i++)
223 pagesizes32[i] = (uint32_t)pagesizes[i];
224
225 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
226 } else
227 #endif
228 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
229 return (error);
230 }
231 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
232 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
233
234 #ifdef SCTL_MASK32
235 int adaptive_machine_arch = 1;
236 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
237 &adaptive_machine_arch, 1,
238 "Adapt reported machine architecture to the ABI of the binary");
239 #endif
240
241 static int
242 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
243 {
244 int error;
245 static const char machine_arch[] = MACHINE_ARCH;
246 #ifdef SCTL_MASK32
247 static const char machine_arch32[] = MACHINE_ARCH32;
248
249 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
250 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
251 else
252 #endif
253 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
254 return (error);
255
256 }
257 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD,
258 NULL, 0, sysctl_hw_machine_arch, "A", "System architecture");
259
260 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
261 #ifdef COMPAT_FREEBSD32
262 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
263 #else
264 MACHINE_ARCH, 0, "Supported architectures for binaries");
265 #endif
266
267 static int
268 sysctl_hostname(SYSCTL_HANDLER_ARGS)
269 {
270 struct prison *pr, *cpr;
271 size_t pr_offset;
272 char tmpname[MAXHOSTNAMELEN];
273 int descend, error, len;
274
275 /*
276 * This function can set: hostname domainname hostuuid.
277 * Keep that in mind when comments say "hostname".
278 */
279 pr_offset = (size_t)arg1;
280 len = arg2;
281 KASSERT(len <= sizeof(tmpname),
282 ("length %d too long for %s", len, __func__));
283
284 pr = req->td->td_ucred->cr_prison;
285 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
286 return (EPERM);
287 /*
288 * Make a local copy of hostname to get/set so we don't have to hold
289 * the jail mutex during the sysctl copyin/copyout activities.
290 */
291 mtx_lock(&pr->pr_mtx);
292 bcopy((char *)pr + pr_offset, tmpname, len);
293 mtx_unlock(&pr->pr_mtx);
294
295 error = sysctl_handle_string(oidp, tmpname, len, req);
296
297 if (req->newptr != NULL && error == 0) {
298 /*
299 * Copy the locally set hostname to all jails that share
300 * this host info.
301 */
302 sx_slock(&allprison_lock);
303 while (!(pr->pr_flags & PR_HOST))
304 pr = pr->pr_parent;
305 mtx_lock(&pr->pr_mtx);
306 bcopy(tmpname, (char *)pr + pr_offset, len);
307 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
308 if (cpr->pr_flags & PR_HOST)
309 descend = 0;
310 else
311 bcopy(tmpname, (char *)cpr + pr_offset, len);
312 mtx_unlock(&pr->pr_mtx);
313 sx_sunlock(&allprison_lock);
314 }
315 return (error);
316 }
317
318 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
319 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
320 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
321 sysctl_hostname, "A", "Hostname");
322 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
323 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
324 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
325 sysctl_hostname, "A", "Name of the current YP/NIS domain");
326 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
327 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
328 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
329 sysctl_hostname, "A", "Host UUID");
330
331 static int regression_securelevel_nonmonotonic = 0;
332
333 #ifdef REGRESSION
334 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
335 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
336 #endif
337
338 static int
339 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
340 {
341 struct prison *pr, *cpr;
342 int descend, error, level;
343
344 pr = req->td->td_ucred->cr_prison;
345
346 /*
347 * Reading the securelevel is easy, since the current jail's level
348 * is known to be at least as secure as any higher levels. Perform
349 * a lockless read since the securelevel is an integer.
350 */
351 level = pr->pr_securelevel;
352 error = sysctl_handle_int(oidp, &level, 0, req);
353 if (error || !req->newptr)
354 return (error);
355 /* Permit update only if the new securelevel exceeds the old. */
356 sx_slock(&allprison_lock);
357 mtx_lock(&pr->pr_mtx);
358 if (!regression_securelevel_nonmonotonic &&
359 level < pr->pr_securelevel) {
360 mtx_unlock(&pr->pr_mtx);
361 sx_sunlock(&allprison_lock);
362 return (EPERM);
363 }
364 pr->pr_securelevel = level;
365 /*
366 * Set all child jails to be at least this level, but do not lower
367 * them (even if regression_securelevel_nonmonotonic).
368 */
369 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
370 if (cpr->pr_securelevel < level)
371 cpr->pr_securelevel = level;
372 }
373 mtx_unlock(&pr->pr_mtx);
374 sx_sunlock(&allprison_lock);
375 return (error);
376 }
377
378 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
379 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
380 "I", "Current secure level");
381
382 #ifdef INCLUDE_CONFIG_FILE
383 /* Actual kernel configuration options. */
384 extern char kernconfstring[];
385
386 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD, kernconfstring, 0,
387 "Kernel configuration file");
388 #endif
389
390 static int
391 sysctl_hostid(SYSCTL_HANDLER_ARGS)
392 {
393 struct prison *pr, *cpr;
394 u_long tmpid;
395 int descend, error;
396
397 /*
398 * Like sysctl_hostname, except it operates on a u_long
399 * instead of a string, and is used only for hostid.
400 */
401 pr = req->td->td_ucred->cr_prison;
402 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
403 return (EPERM);
404 tmpid = pr->pr_hostid;
405 error = sysctl_handle_long(oidp, &tmpid, 0, req);
406
407 if (req->newptr != NULL && error == 0) {
408 sx_slock(&allprison_lock);
409 while (!(pr->pr_flags & PR_HOST))
410 pr = pr->pr_parent;
411 mtx_lock(&pr->pr_mtx);
412 pr->pr_hostid = tmpid;
413 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
414 if (cpr->pr_flags & PR_HOST)
415 descend = 0;
416 else
417 cpr->pr_hostid = tmpid;
418 mtx_unlock(&pr->pr_mtx);
419 sx_sunlock(&allprison_lock);
420 }
421 return (error);
422 }
423
424 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
425 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
426 NULL, 0, sysctl_hostid, "LU", "Host ID");
427
428 /*
429 * The osrelease string is copied from the global (osrelease in vers.c) into
430 * prison0 by a sysinit and is inherited by child jails if not changed at jail
431 * creation, so we always return the copy from the current prison data.
432 */
433 static int
434 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
435 {
436 struct prison *pr;
437
438 pr = req->td->td_ucred->cr_prison;
439 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
440
441 }
442
443 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
444 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
445 NULL, 0, sysctl_osrelease, "A", "Operating system release");
446
447 /*
448 * The osreldate number is copied from the global (osreldate in vers.c) into
449 * prison0 by a sysinit and is inherited by child jails if not changed at jail
450 * creation, so we always return the value from the current prison data.
451 */
452 static int
453 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
454 {
455 struct prison *pr;
456
457 pr = req->td->td_ucred->cr_prison;
458 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
459
460 }
461
462 /*
463 * NOTICE: The *userland* release date is available in
464 * /usr/include/osreldate.h
465 */
466 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
467 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
468 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
469
470 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
471
472 #ifdef COMPAT_FREEBSD4
473 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
474 #endif
475
476 #ifdef COMPAT_FREEBSD5
477 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
478 #endif
479
480 #ifdef COMPAT_FREEBSD6
481 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
482 #endif
483
484 #ifdef COMPAT_FREEBSD7
485 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
486 #endif
487
488 /*
489 * This is really cheating. These actually live in the libc, something
490 * which I'm not quite sure is a good idea anyway, but in order for
491 * getnext and friends to actually work, we define dummies here.
492 *
493 * XXXRW: These probably should be CTLFLAG_CAPRD.
494 */
495 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
496 "", 0, "PATH that finds all the standard utilities");
497 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
498 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
499 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
500 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
501 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
502 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
503 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
504 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
505 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
506 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
507 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
508 SYSCTL_NULL_INT_PTR, 0, "");
509 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
510 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
511 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
512 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
513 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
514 SYSCTL_NULL_INT_PTR, 0,
515 "The version of POSIX 1003.2 with which the system attempts to comply");
516 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
517 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
518 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
519 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
520 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
521 SYSCTL_NULL_INT_PTR, 0, "");
522 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
523 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
524 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
526 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
527 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
528 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
529 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
530 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
532 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
533 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
534 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
535 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
536
537 #include <sys/vnode.h>
538 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
539 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
540
541 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
542 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
543
544 static int
545 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
546 {
547 int error, pm;
548
549 pm = pid_max;
550 error = sysctl_handle_int(oidp, &pm, 0, req);
551 if (error || !req->newptr)
552 return (error);
553 sx_xlock(&proctree_lock);
554 sx_xlock(&allproc_lock);
555
556 /*
557 * Only permit the values less then PID_MAX.
558 * As a safety measure, do not allow to limit the pid_max too much.
559 */
560 if (pm < 300 || pm > PID_MAX)
561 error = EINVAL;
562 else
563 pid_max = pm;
564 sx_xunlock(&allproc_lock);
565 sx_xunlock(&proctree_lock);
566 return (error);
567 }
568 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
569 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
570 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
571
572 #include <sys/bio.h>
573 #include <sys/buf.h>
574 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
575 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
576 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
577 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
578
579 #include <sys/user.h>
580 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
581 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
582
583 /* Used by kernel debuggers. */
584 const int pcb_size = sizeof(struct pcb);
585 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
586 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
587
588 /* XXX compatibility, remove for 6.0 */
589 #include <sys/imgact.h>
590 #include <sys/imgact_elf.h>
591 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
592 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
593 "compatibility for kern.fallback_elf_brand");
Cache object: 0f851cc2f8ca32731a98c34773a82c1a
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