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/11.2/sys/kern/kern_mib.c 331722 2018-03-29 02:50:57Z eadler $");
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/vmmeter.h>
56 #include <sys/sysctl.h>
57 #include <sys/systm.h>
58 #include <sys/unistd.h>
59
60 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0,
61 "Sysctl internal magic");
62 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0,
63 "High kernel, proc, limits &c");
64 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0,
65 "Virtual memory");
66 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0,
67 "File system");
68 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0,
69 "Network, (see socket.h)");
70 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0,
71 "Debugging");
72 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
73 "Sizeof various things");
74 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0,
75 "hardware");
76 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
77 "machine dependent");
78 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0,
79 "user-level");
80 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
81 "p1003_1b, (see p1003_1b.h)");
82
83 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0,
84 "Compatibility code");
85 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0,
86 "Security");
87 #ifdef REGRESSION
88 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0,
89 "Regression test MIB");
90 #endif
91
92 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
93 kern_ident, 0, "Kernel identifier");
94
95 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
96 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
97
98 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
99 version, 0, "Kernel version");
100
101 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
102 compiler_version, 0, "Version of compiler used to compile kernel");
103
104 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
105 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
106
107 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
108 &maxproc, 0, "Maximum number of processes");
109
110 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
111 &maxprocperuid, 0, "Maximum processes allowed per userid");
112
113 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
114 &maxusers, 0, "Hint for kernel tuning");
115
116 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
117 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
118
119 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
120 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
121
122 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
123 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
124 "Maximum number of supplemental groups a user can belong to");
125
126 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
127 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
128
129 #ifdef _POSIX_SAVED_IDS
130 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
131 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
132 #else
133 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
134 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
135 #endif
136
137 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
138
139 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE,
140 kernelname, sizeof kernelname, "Name of kernel file booted");
141
142 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
143 &mp_ncpus, 0, "Number of active CPUs");
144
145 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
146 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
147
148 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
149 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
150
151 static int
152 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
153 {
154 char buf[256];
155 size_t len;
156
157 /*-
158 * This is one of the very few legitimate uses of read_random(9).
159 * Use of arc4random(9) is not recommended as that will ignore
160 * an unsafe (i.e. unseeded) random(4).
161 *
162 * If random(4) is not seeded, then this returns 0, so the
163 * sysctl will return a zero-length buffer.
164 */
165 len = read_random(buf, MIN(req->oldlen, sizeof(buf)));
166 return (SYSCTL_OUT(req, buf, len));
167 }
168
169 SYSCTL_PROC(_kern, KERN_ARND, arandom,
170 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
171 sysctl_kern_arnd, "", "arc4rand");
172
173 static int
174 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
175 {
176 u_long val;
177
178 val = ctob(physmem);
179 return (sysctl_handle_long(oidp, &val, 0, req));
180 }
181
182 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
183 0, 0, sysctl_hw_physmem, "LU", "");
184
185 static int
186 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
187 {
188 u_long val;
189 val = ctob(realmem);
190 return (sysctl_handle_long(oidp, &val, 0, req));
191 }
192 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
193 0, 0, sysctl_hw_realmem, "LU", "");
194 static int
195 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
196 {
197 u_long val;
198
199 val = ctob(physmem - vm_cnt.v_wire_count);
200 return (sysctl_handle_long(oidp, &val, 0, req));
201 }
202
203 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
204 0, 0, sysctl_hw_usermem, "LU", "");
205
206 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
207
208 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
209
210 static int
211 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
212 {
213 int error;
214 #ifdef SCTL_MASK32
215 int i;
216 uint32_t pagesizes32[MAXPAGESIZES];
217
218 if (req->flags & SCTL_MASK32) {
219 /*
220 * Recreate the "pagesizes" array with 32-bit elements. Truncate
221 * any page size greater than UINT32_MAX to zero.
222 */
223 for (i = 0; i < MAXPAGESIZES; i++)
224 pagesizes32[i] = (uint32_t)pagesizes[i];
225
226 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
227 } else
228 #endif
229 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
230 return (error);
231 }
232 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
233 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
234
235 #ifdef SCTL_MASK32
236 int adaptive_machine_arch = 1;
237 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
238 &adaptive_machine_arch, 1,
239 "Adapt reported machine architecture to the ABI of the binary");
240 #endif
241
242 static int
243 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
244 {
245 int error;
246 static const char machine_arch[] = MACHINE_ARCH;
247 #ifdef SCTL_MASK32
248 static const char machine_arch32[] = MACHINE_ARCH32;
249
250 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
251 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
252 else
253 #endif
254 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
255 return (error);
256
257 }
258 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
259 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
260 "System architecture");
261
262 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
263 #ifdef COMPAT_FREEBSD32
264 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
265 #else
266 MACHINE_ARCH, 0, "Supported architectures for binaries");
267 #endif
268
269 static int
270 sysctl_hostname(SYSCTL_HANDLER_ARGS)
271 {
272 struct prison *pr, *cpr;
273 size_t pr_offset;
274 char tmpname[MAXHOSTNAMELEN];
275 int descend, error, len;
276
277 /*
278 * This function can set: hostname domainname hostuuid.
279 * Keep that in mind when comments say "hostname".
280 */
281 pr_offset = (size_t)arg1;
282 len = arg2;
283 KASSERT(len <= sizeof(tmpname),
284 ("length %d too long for %s", len, __func__));
285
286 pr = req->td->td_ucred->cr_prison;
287 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
288 return (EPERM);
289 /*
290 * Make a local copy of hostname to get/set so we don't have to hold
291 * the jail mutex during the sysctl copyin/copyout activities.
292 */
293 mtx_lock(&pr->pr_mtx);
294 bcopy((char *)pr + pr_offset, tmpname, len);
295 mtx_unlock(&pr->pr_mtx);
296
297 error = sysctl_handle_string(oidp, tmpname, len, req);
298
299 if (req->newptr != NULL && error == 0) {
300 /*
301 * Copy the locally set hostname to all jails that share
302 * this host info.
303 */
304 sx_slock(&allprison_lock);
305 while (!(pr->pr_flags & PR_HOST))
306 pr = pr->pr_parent;
307 mtx_lock(&pr->pr_mtx);
308 bcopy(tmpname, (char *)pr + pr_offset, len);
309 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
310 if (cpr->pr_flags & PR_HOST)
311 descend = 0;
312 else
313 bcopy(tmpname, (char *)cpr + pr_offset, len);
314 mtx_unlock(&pr->pr_mtx);
315 sx_sunlock(&allprison_lock);
316 }
317 return (error);
318 }
319
320 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
321 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
322 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
323 sysctl_hostname, "A", "Hostname");
324 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
325 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
326 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
327 sysctl_hostname, "A", "Name of the current YP/NIS domain");
328 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
329 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
330 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
331 sysctl_hostname, "A", "Host UUID");
332
333 static int regression_securelevel_nonmonotonic = 0;
334
335 #ifdef REGRESSION
336 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
337 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
338 #endif
339
340 static int
341 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
342 {
343 struct prison *pr, *cpr;
344 int descend, error, level;
345
346 pr = req->td->td_ucred->cr_prison;
347
348 /*
349 * Reading the securelevel is easy, since the current jail's level
350 * is known to be at least as secure as any higher levels. Perform
351 * a lockless read since the securelevel is an integer.
352 */
353 level = pr->pr_securelevel;
354 error = sysctl_handle_int(oidp, &level, 0, req);
355 if (error || !req->newptr)
356 return (error);
357 /* Permit update only if the new securelevel exceeds the old. */
358 sx_slock(&allprison_lock);
359 mtx_lock(&pr->pr_mtx);
360 if (!regression_securelevel_nonmonotonic &&
361 level < pr->pr_securelevel) {
362 mtx_unlock(&pr->pr_mtx);
363 sx_sunlock(&allprison_lock);
364 return (EPERM);
365 }
366 pr->pr_securelevel = level;
367 /*
368 * Set all child jails to be at least this level, but do not lower
369 * them (even if regression_securelevel_nonmonotonic).
370 */
371 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
372 if (cpr->pr_securelevel < level)
373 cpr->pr_securelevel = level;
374 }
375 mtx_unlock(&pr->pr_mtx);
376 sx_sunlock(&allprison_lock);
377 return (error);
378 }
379
380 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
381 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
382 "I", "Current secure level");
383
384 #ifdef INCLUDE_CONFIG_FILE
385 /* Actual kernel configuration options. */
386 extern char kernconfstring[];
387
388 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE,
389 kernconfstring, 0, "Kernel configuration file");
390 #endif
391
392 static int
393 sysctl_hostid(SYSCTL_HANDLER_ARGS)
394 {
395 struct prison *pr, *cpr;
396 u_long tmpid;
397 int descend, error;
398
399 /*
400 * Like sysctl_hostname, except it operates on a u_long
401 * instead of a string, and is used only for hostid.
402 */
403 pr = req->td->td_ucred->cr_prison;
404 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
405 return (EPERM);
406 tmpid = pr->pr_hostid;
407 error = sysctl_handle_long(oidp, &tmpid, 0, req);
408
409 if (req->newptr != NULL && error == 0) {
410 sx_slock(&allprison_lock);
411 while (!(pr->pr_flags & PR_HOST))
412 pr = pr->pr_parent;
413 mtx_lock(&pr->pr_mtx);
414 pr->pr_hostid = tmpid;
415 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
416 if (cpr->pr_flags & PR_HOST)
417 descend = 0;
418 else
419 cpr->pr_hostid = tmpid;
420 mtx_unlock(&pr->pr_mtx);
421 sx_sunlock(&allprison_lock);
422 }
423 return (error);
424 }
425
426 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
427 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
428 NULL, 0, sysctl_hostid, "LU", "Host ID");
429
430 /*
431 * The osrelease string is copied from the global (osrelease in vers.c) into
432 * prison0 by a sysinit and is inherited by child jails if not changed at jail
433 * creation, so we always return the copy from the current prison data.
434 */
435 static int
436 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
437 {
438 struct prison *pr;
439
440 pr = req->td->td_ucred->cr_prison;
441 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
442
443 }
444
445 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
446 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
447 NULL, 0, sysctl_osrelease, "A", "Operating system release");
448
449 /*
450 * The osreldate number is copied from the global (osreldate in vers.c) into
451 * prison0 by a sysinit and is inherited by child jails if not changed at jail
452 * creation, so we always return the value from the current prison data.
453 */
454 static int
455 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
456 {
457 struct prison *pr;
458
459 pr = req->td->td_ucred->cr_prison;
460 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
461
462 }
463
464 /*
465 * NOTICE: The *userland* release date is available in
466 * /usr/include/osreldate.h
467 */
468 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
469 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
470 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
471
472 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
473
474 #ifdef COMPAT_FREEBSD4
475 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
476 #endif
477
478 #ifdef COMPAT_FREEBSD5
479 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
480 #endif
481
482 #ifdef COMPAT_FREEBSD6
483 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
484 #endif
485
486 #ifdef COMPAT_FREEBSD7
487 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
488 #endif
489
490 /*
491 * This is really cheating. These actually live in the libc, something
492 * which I'm not quite sure is a good idea anyway, but in order for
493 * getnext and friends to actually work, we define dummies here.
494 *
495 * XXXRW: These probably should be CTLFLAG_CAPRD.
496 */
497 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
498 "", 0, "PATH that finds all the standard utilities");
499 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
500 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
501 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
502 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
503 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
504 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
505 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
506 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
507 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
508 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
509 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
510 SYSCTL_NULL_INT_PTR, 0, "");
511 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
512 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
513 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
514 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
515 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
516 SYSCTL_NULL_INT_PTR, 0,
517 "The version of POSIX 1003.2 with which the system attempts to comply");
518 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
519 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
520 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
521 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
522 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
523 SYSCTL_NULL_INT_PTR, 0, "");
524 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
526 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
527 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
528 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
529 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
530 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
532 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
533 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
534 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
535 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
536 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
537 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
538
539 #include <sys/vnode.h>
540 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
541 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
542
543 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
544 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
545
546 static int
547 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
548 {
549 int error, pm;
550
551 pm = pid_max;
552 error = sysctl_handle_int(oidp, &pm, 0, req);
553 if (error || !req->newptr)
554 return (error);
555 sx_xlock(&proctree_lock);
556 sx_xlock(&allproc_lock);
557
558 /*
559 * Only permit the values less then PID_MAX.
560 * As a safety measure, do not allow to limit the pid_max too much.
561 */
562 if (pm < 300 || pm > PID_MAX)
563 error = EINVAL;
564 else
565 pid_max = pm;
566 sx_xunlock(&allproc_lock);
567 sx_xunlock(&proctree_lock);
568 return (error);
569 }
570 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
571 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
572 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
573
574 #include <sys/bio.h>
575 #include <sys/buf.h>
576 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
577 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
578 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
579 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
580
581 #include <sys/user.h>
582 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
583 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
584
585 /* Used by kernel debuggers. */
586 const int pcb_size = sizeof(struct pcb);
587 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
588 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
589
590 /* XXX compatibility, remove for 6.0 */
591 #include <sys/imgact.h>
592 #include <sys/imgact_elf.h>
593 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
594 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
595 "compatibility for kern.fallback_elf_brand");
Cache object: 467f9b6133d8a604f56b8f2efa61e438
|