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/10.2/sys/kern/kern_mib.c 280632 2015-03-25 20:57:54Z ian $");
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/kernel.h>
47 #include <sys/sbuf.h>
48 #include <sys/systm.h>
49 #include <sys/sysctl.h>
50 #include <sys/proc.h>
51 #include <sys/lock.h>
52 #include <sys/mutex.h>
53 #include <sys/jail.h>
54 #include <sys/smp.h>
55 #include <sys/sx.h>
56 #include <sys/unistd.h>
57
58 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0,
59 "Sysctl internal magic");
60 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0,
61 "High kernel, proc, limits &c");
62 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0,
63 "Virtual memory");
64 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0,
65 "File system");
66 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0,
67 "Network, (see socket.h)");
68 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0,
69 "Debugging");
70 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
71 "Sizeof various things");
72 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0,
73 "hardware");
74 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
75 "machine dependent");
76 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0,
77 "user-level");
78 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
79 "p1003_1b, (see p1003_1b.h)");
80
81 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0,
82 "Compatibility code");
83 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0,
84 "Security");
85 #ifdef REGRESSION
86 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0,
87 "Regression test MIB");
88 #endif
89
90 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
91 kern_ident, 0, "Kernel identifier");
92
93 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
94 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
95
96 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
97 version, 0, "Kernel version");
98
99 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
100 compiler_version, 0, "Version of compiler used to compile kernel");
101
102 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
103 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
104
105 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN,
106 &maxproc, 0, "Maximum number of processes");
107
108 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
109 &maxprocperuid, 0, "Maximum processes allowed per userid");
110
111 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN,
112 &maxusers, 0, "Hint for kernel tuning");
113
114 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
115 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
116
117 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
118 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
119
120 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN|CTLFLAG_CAPRD,
121 &ngroups_max, 0,
122 "Maximum number of supplemental groups a user can belong to");
123
124 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
125 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
126
127 #ifdef _POSIX_SAVED_IDS
128 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
129 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
130 #else
131 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
132 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
133 #endif
134
135 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
136
137 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
138 kernelname, sizeof kernelname, "Name of kernel file booted");
139
140 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
141 &mp_ncpus, 0, "Number of active CPUs");
142
143 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
144 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
145
146 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
147 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
148
149 static int
150 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
151 {
152 char buf[256];
153 size_t len;
154
155 len = req->oldlen;
156 if (len > sizeof(buf))
157 len = sizeof(buf);
158 arc4rand(buf, len, 0);
159 return (SYSCTL_OUT(req, buf, len));
160 }
161
162 SYSCTL_PROC(_kern, KERN_ARND, arandom,
163 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
164 sysctl_kern_arnd, "", "arc4rand");
165
166 static int
167 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
168 {
169 u_long val;
170
171 val = ctob(physmem);
172 return (sysctl_handle_long(oidp, &val, 0, req));
173 }
174
175 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
176 0, 0, sysctl_hw_physmem, "LU", "");
177
178 static int
179 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
180 {
181 u_long val;
182 val = ctob(realmem);
183 return (sysctl_handle_long(oidp, &val, 0, req));
184 }
185 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
186 0, 0, sysctl_hw_realmem, "LU", "");
187 static int
188 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
189 {
190 u_long val;
191
192 val = ctob(physmem - cnt.v_wire_count);
193 return (sysctl_handle_long(oidp, &val, 0, req));
194 }
195
196 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
197 0, 0, sysctl_hw_usermem, "LU", "");
198
199 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
200
201 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
202
203 static int
204 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
205 {
206 int error;
207 #ifdef SCTL_MASK32
208 int i;
209 uint32_t pagesizes32[MAXPAGESIZES];
210
211 if (req->flags & SCTL_MASK32) {
212 /*
213 * Recreate the "pagesizes" array with 32-bit elements. Truncate
214 * any page size greater than UINT32_MAX to zero.
215 */
216 for (i = 0; i < MAXPAGESIZES; i++)
217 pagesizes32[i] = (uint32_t)pagesizes[i];
218
219 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
220 } else
221 #endif
222 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
223 return (error);
224 }
225 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
226 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
227
228 #ifdef SCTL_MASK32
229 int adaptive_machine_arch = 1;
230 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
231 &adaptive_machine_arch, 1,
232 "Adapt reported machine architecture to the ABI of the binary");
233 #endif
234
235 static int
236 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
237 {
238 int error;
239 static const char machine_arch[] = MACHINE_ARCH;
240 #ifdef SCTL_MASK32
241 static const char machine_arch32[] = MACHINE_ARCH32;
242
243 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
244 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
245 else
246 #endif
247 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
248 return (error);
249
250 }
251 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD,
252 NULL, 0, sysctl_hw_machine_arch, "A", "System architecture");
253
254 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
255 #ifdef COMPAT_FREEBSD32
256 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
257 #else
258 MACHINE_ARCH, 0, "Supported architectures for binaries");
259 #endif
260
261 static int
262 sysctl_hostname(SYSCTL_HANDLER_ARGS)
263 {
264 struct prison *pr, *cpr;
265 size_t pr_offset;
266 char tmpname[MAXHOSTNAMELEN];
267 int descend, error, len;
268
269 /*
270 * This function can set: hostname domainname hostuuid.
271 * Keep that in mind when comments say "hostname".
272 */
273 pr_offset = (size_t)arg1;
274 len = arg2;
275 KASSERT(len <= sizeof(tmpname),
276 ("length %d too long for %s", len, __func__));
277
278 pr = req->td->td_ucred->cr_prison;
279 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
280 return (EPERM);
281 /*
282 * Make a local copy of hostname to get/set so we don't have to hold
283 * the jail mutex during the sysctl copyin/copyout activities.
284 */
285 mtx_lock(&pr->pr_mtx);
286 bcopy((char *)pr + pr_offset, tmpname, len);
287 mtx_unlock(&pr->pr_mtx);
288
289 error = sysctl_handle_string(oidp, tmpname, len, req);
290
291 if (req->newptr != NULL && error == 0) {
292 /*
293 * Copy the locally set hostname to all jails that share
294 * this host info.
295 */
296 sx_slock(&allprison_lock);
297 while (!(pr->pr_flags & PR_HOST))
298 pr = pr->pr_parent;
299 mtx_lock(&pr->pr_mtx);
300 bcopy(tmpname, (char *)pr + pr_offset, len);
301 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
302 if (cpr->pr_flags & PR_HOST)
303 descend = 0;
304 else
305 bcopy(tmpname, (char *)cpr + pr_offset, len);
306 mtx_unlock(&pr->pr_mtx);
307 sx_sunlock(&allprison_lock);
308 }
309 return (error);
310 }
311
312 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
313 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
314 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
315 sysctl_hostname, "A", "Hostname");
316 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
317 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
318 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
319 sysctl_hostname, "A", "Name of the current YP/NIS domain");
320 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
321 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
322 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
323 sysctl_hostname, "A", "Host UUID");
324
325 static int regression_securelevel_nonmonotonic = 0;
326
327 #ifdef REGRESSION
328 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
329 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
330 #endif
331
332 static int
333 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
334 {
335 struct prison *pr, *cpr;
336 int descend, error, level;
337
338 pr = req->td->td_ucred->cr_prison;
339
340 /*
341 * Reading the securelevel is easy, since the current jail's level
342 * is known to be at least as secure as any higher levels. Perform
343 * a lockless read since the securelevel is an integer.
344 */
345 level = pr->pr_securelevel;
346 error = sysctl_handle_int(oidp, &level, 0, req);
347 if (error || !req->newptr)
348 return (error);
349 /* Permit update only if the new securelevel exceeds the old. */
350 sx_slock(&allprison_lock);
351 mtx_lock(&pr->pr_mtx);
352 if (!regression_securelevel_nonmonotonic &&
353 level < pr->pr_securelevel) {
354 mtx_unlock(&pr->pr_mtx);
355 sx_sunlock(&allprison_lock);
356 return (EPERM);
357 }
358 pr->pr_securelevel = level;
359 /*
360 * Set all child jails to be at least this level, but do not lower
361 * them (even if regression_securelevel_nonmonotonic).
362 */
363 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
364 if (cpr->pr_securelevel < level)
365 cpr->pr_securelevel = level;
366 }
367 mtx_unlock(&pr->pr_mtx);
368 sx_sunlock(&allprison_lock);
369 return (error);
370 }
371
372 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
373 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
374 "I", "Current secure level");
375
376 #ifdef INCLUDE_CONFIG_FILE
377 /* Actual kernel configuration options. */
378 extern char kernconfstring[];
379
380 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD, kernconfstring, 0,
381 "Kernel configuration file");
382 #endif
383
384 static int
385 sysctl_hostid(SYSCTL_HANDLER_ARGS)
386 {
387 struct prison *pr, *cpr;
388 u_long tmpid;
389 int descend, error;
390
391 /*
392 * Like sysctl_hostname, except it operates on a u_long
393 * instead of a string, and is used only for hostid.
394 */
395 pr = req->td->td_ucred->cr_prison;
396 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
397 return (EPERM);
398 tmpid = pr->pr_hostid;
399 error = sysctl_handle_long(oidp, &tmpid, 0, req);
400
401 if (req->newptr != NULL && error == 0) {
402 sx_slock(&allprison_lock);
403 while (!(pr->pr_flags & PR_HOST))
404 pr = pr->pr_parent;
405 mtx_lock(&pr->pr_mtx);
406 pr->pr_hostid = tmpid;
407 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
408 if (cpr->pr_flags & PR_HOST)
409 descend = 0;
410 else
411 cpr->pr_hostid = tmpid;
412 mtx_unlock(&pr->pr_mtx);
413 sx_sunlock(&allprison_lock);
414 }
415 return (error);
416 }
417
418 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
419 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
420 NULL, 0, sysctl_hostid, "LU", "Host ID");
421
422 /*
423 * The osrelease string is copied from the global (osrelease in vers.c) into
424 * prison0 by a sysinit and is inherited by child jails if not changed at jail
425 * creation, so we always return the copy from the current prison data.
426 */
427 static int
428 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
429 {
430 struct prison *pr;
431
432 pr = req->td->td_ucred->cr_prison;
433 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
434
435 }
436
437 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
438 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
439 NULL, 0, sysctl_osrelease, "A", "Operating system release");
440
441 /*
442 * The osreldate number is copied from the global (osreldate in vers.c) into
443 * prison0 by a sysinit and is inherited by child jails if not changed at jail
444 * creation, so we always return the value from the current prison data.
445 */
446 static int
447 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
448 {
449 struct prison *pr;
450
451 pr = req->td->td_ucred->cr_prison;
452 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
453
454 }
455
456 /*
457 * NOTICE: The *userland* release date is available in
458 * /usr/include/osreldate.h
459 */
460 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
461 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
462 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
463
464 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
465
466 #ifdef COMPAT_FREEBSD4
467 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
468 #endif
469
470 #ifdef COMPAT_FREEBSD5
471 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
472 #endif
473
474 #ifdef COMPAT_FREEBSD6
475 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
476 #endif
477
478 #ifdef COMPAT_FREEBSD7
479 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
480 #endif
481
482 /*
483 * This is really cheating. These actually live in the libc, something
484 * which I'm not quite sure is a good idea anyway, but in order for
485 * getnext and friends to actually work, we define dummies here.
486 *
487 * XXXRW: These probably should be CTLFLAG_CAPRD.
488 */
489 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
490 "", 0, "PATH that finds all the standard utilities");
491 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
492 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
493 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
494 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
495 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
496 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
497 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
498 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
499 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
500 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
501 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
502 SYSCTL_NULL_INT_PTR, 0, "");
503 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
504 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
505 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
506 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
507 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
508 SYSCTL_NULL_INT_PTR, 0,
509 "The version of POSIX 1003.2 with which the system attempts to comply");
510 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
511 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
512 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
513 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
514 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
515 SYSCTL_NULL_INT_PTR, 0, "");
516 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
517 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
518 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
519 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
520 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
521 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
522 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
523 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
524 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
526 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
527 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
528 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
529 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
530
531 #include <sys/vnode.h>
532 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
533 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
534
535 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
536 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
537
538 static int
539 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
540 {
541 int error, pm;
542
543 pm = pid_max;
544 error = sysctl_handle_int(oidp, &pm, 0, req);
545 if (error || !req->newptr)
546 return (error);
547 sx_xlock(&proctree_lock);
548 sx_xlock(&allproc_lock);
549
550 /*
551 * Only permit the values less then PID_MAX.
552 * As a safety measure, do not allow to limit the pid_max too much.
553 */
554 if (pm < 300 || pm > PID_MAX)
555 error = EINVAL;
556 else
557 pid_max = pm;
558 sx_xunlock(&allproc_lock);
559 sx_xunlock(&proctree_lock);
560 return (error);
561 }
562 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_TUN |
563 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I",
564 "Maximum allowed pid");
565
566 #include <sys/bio.h>
567 #include <sys/buf.h>
568 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
569 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
570 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
571 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
572
573 #include <sys/user.h>
574 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
575 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
576
577 /* XXX compatibility, remove for 6.0 */
578 #include <sys/imgact.h>
579 #include <sys/imgact_elf.h>
580 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
581 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
582 "compatibility for kern.fallback_elf_brand");
Cache object: 52114892fc27c182df1468ee6df3bb55
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