2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Mike Karels at Berkeley Software Design, Inc.
10 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
11 * project, to make these variables more userfriendly.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include "opt_posix.h"
44 #include "opt_config.h"
46 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/limits.h>
52 #include <sys/mutex.h>
54 #include <sys/random.h>
58 #include <sys/vmmeter.h>
59 #include <sys/sysctl.h>
60 #include <sys/systm.h>
61 #include <sys/unistd.h>
63 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0,
64 "Sysctl internal magic");
65 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0,
66 "High kernel, proc, limits &c");
67 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0,
69 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0,
71 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0,
72 "Network, (see socket.h)");
73 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0,
75 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
76 "Sizeof various things");
77 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0,
79 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
81 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0,
83 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
84 "p1003_1b, (see p1003_1b.h)");
86 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0,
87 "Compatibility code");
88 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0,
91 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0,
92 "Regression test MIB");
95 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
96 kern_ident, 0, "Kernel identifier");
98 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
99 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
101 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
102 version, 0, "Kernel version");
104 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
105 compiler_version, 0, "Version of compiler used to compile kernel");
107 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
108 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
110 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
111 &maxproc, 0, "Maximum number of processes");
113 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
114 &maxprocperuid, 0, "Maximum processes allowed per userid");
116 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
117 &maxusers, 0, "Hint for kernel tuning");
119 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
120 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
122 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
123 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
125 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
126 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
127 "Maximum number of supplemental groups a user can belong to");
129 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
130 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
132 #ifdef _POSIX_SAVED_IDS
133 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
134 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
136 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
137 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
140 char kernelname[MAXPATHLEN] = PATH_KERNEL; /* XXX bloat */
142 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE,
143 kernelname, sizeof kernelname, "Name of kernel file booted");
145 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD,
146 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size");
148 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
149 &mp_ncpus, 0, "Number of active CPUs");
151 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
152 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
154 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
155 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
158 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
163 len = MIN(req->oldlen, sizeof(buf));
164 read_random(buf, len);
165 return (SYSCTL_OUT(req, buf, len));
168 SYSCTL_PROC(_kern, KERN_ARND, arandom,
169 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
170 sysctl_kern_arnd, "", "arc4rand");
173 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
177 p = SIZE_T_MAX >> PAGE_SHIFT;
181 return (sysctl_handle_long(oidp, &val, 0, req));
183 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
184 0, 0, sysctl_hw_physmem, "LU",
185 "Amount of physical memory (in bytes)");
188 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
192 p = SIZE_T_MAX >> PAGE_SHIFT;
196 return (sysctl_handle_long(oidp, &val, 0, req));
198 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
199 0, 0, sysctl_hw_realmem, "LU",
200 "Amount of memory (in bytes) reported by the firmware");
203 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
207 p1 = physmem - vm_wire_count();
208 p = SIZE_T_MAX >> PAGE_SHIFT;
212 return (sysctl_handle_long(oidp, &val, 0, req));
214 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
215 0, 0, sysctl_hw_usermem, "LU",
216 "Amount of memory (in bytes) which is not wired");
218 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0,
219 "Amount of physical memory (in pages)");
221 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
224 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
229 uint32_t pagesizes32[MAXPAGESIZES];
231 if (req->flags & SCTL_MASK32) {
233 * Recreate the "pagesizes" array with 32-bit elements. Truncate
234 * any page size greater than UINT32_MAX to zero.
236 for (i = 0; i < MAXPAGESIZES; i++)
237 pagesizes32[i] = (uint32_t)pagesizes[i];
239 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
242 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
245 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
246 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
249 int adaptive_machine_arch = 1;
250 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
251 &adaptive_machine_arch, 1,
252 "Adapt reported machine architecture to the ABI of the binary");
256 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
259 static const char machine_arch[] = MACHINE_ARCH;
261 static const char machine_arch32[] = MACHINE_ARCH32;
263 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
264 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
267 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
271 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
272 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
273 "System architecture");
275 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
276 #ifdef COMPAT_FREEBSD32
277 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
279 MACHINE_ARCH, 0, "Supported architectures for binaries");
283 sysctl_hostname(SYSCTL_HANDLER_ARGS)
285 struct prison *pr, *cpr;
287 char tmpname[MAXHOSTNAMELEN];
288 int descend, error, len;
291 * This function can set: hostname domainname hostuuid.
292 * Keep that in mind when comments say "hostname".
294 pr_offset = (size_t)arg1;
296 KASSERT(len <= sizeof(tmpname),
297 ("length %d too long for %s", len, __func__));
299 pr = req->td->td_ucred->cr_prison;
300 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
303 * Make a local copy of hostname to get/set so we don't have to hold
304 * the jail mutex during the sysctl copyin/copyout activities.
306 mtx_lock(&pr->pr_mtx);
307 bcopy((char *)pr + pr_offset, tmpname, len);
308 mtx_unlock(&pr->pr_mtx);
310 error = sysctl_handle_string(oidp, tmpname, len, req);
312 if (req->newptr != NULL && error == 0) {
314 * Copy the locally set hostname to all jails that share
317 sx_slock(&allprison_lock);
318 while (!(pr->pr_flags & PR_HOST))
320 mtx_lock(&pr->pr_mtx);
321 bcopy(tmpname, (char *)pr + pr_offset, len);
322 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
323 if (cpr->pr_flags & PR_HOST)
326 bcopy(tmpname, (char *)cpr + pr_offset, len);
327 mtx_unlock(&pr->pr_mtx);
328 sx_sunlock(&allprison_lock);
333 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
334 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
335 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
336 sysctl_hostname, "A", "Hostname");
337 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
338 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
339 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
340 sysctl_hostname, "A", "Name of the current YP/NIS domain");
341 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
342 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
343 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
344 sysctl_hostname, "A", "Host UUID");
346 static int regression_securelevel_nonmonotonic = 0;
349 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
350 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
354 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
356 struct prison *pr, *cpr;
357 int descend, error, level;
359 pr = req->td->td_ucred->cr_prison;
362 * Reading the securelevel is easy, since the current jail's level
363 * is known to be at least as secure as any higher levels. Perform
364 * a lockless read since the securelevel is an integer.
366 level = pr->pr_securelevel;
367 error = sysctl_handle_int(oidp, &level, 0, req);
368 if (error || !req->newptr)
370 /* Permit update only if the new securelevel exceeds the old. */
371 sx_slock(&allprison_lock);
372 mtx_lock(&pr->pr_mtx);
373 if (!regression_securelevel_nonmonotonic &&
374 level < pr->pr_securelevel) {
375 mtx_unlock(&pr->pr_mtx);
376 sx_sunlock(&allprison_lock);
379 pr->pr_securelevel = level;
381 * Set all child jails to be at least this level, but do not lower
382 * them (even if regression_securelevel_nonmonotonic).
384 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
385 if (cpr->pr_securelevel < level)
386 cpr->pr_securelevel = level;
388 mtx_unlock(&pr->pr_mtx);
389 sx_sunlock(&allprison_lock);
393 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
394 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
395 "I", "Current secure level");
397 #ifdef INCLUDE_CONFIG_FILE
398 /* Actual kernel configuration options. */
399 extern char kernconfstring[];
401 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE,
402 kernconfstring, 0, "Kernel configuration file");
406 sysctl_hostid(SYSCTL_HANDLER_ARGS)
408 struct prison *pr, *cpr;
413 * Like sysctl_hostname, except it operates on a u_long
414 * instead of a string, and is used only for hostid.
416 pr = req->td->td_ucred->cr_prison;
417 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
419 tmpid = pr->pr_hostid;
420 error = sysctl_handle_long(oidp, &tmpid, 0, req);
422 if (req->newptr != NULL && error == 0) {
423 sx_slock(&allprison_lock);
424 while (!(pr->pr_flags & PR_HOST))
426 mtx_lock(&pr->pr_mtx);
427 pr->pr_hostid = tmpid;
428 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
429 if (cpr->pr_flags & PR_HOST)
432 cpr->pr_hostid = tmpid;
433 mtx_unlock(&pr->pr_mtx);
434 sx_sunlock(&allprison_lock);
439 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
440 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
441 NULL, 0, sysctl_hostid, "LU", "Host ID");
444 * The osrelease string is copied from the global (osrelease in vers.c) into
445 * prison0 by a sysinit and is inherited by child jails if not changed at jail
446 * creation, so we always return the copy from the current prison data.
449 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
453 pr = req->td->td_ucred->cr_prison;
454 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
458 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
459 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
460 NULL, 0, sysctl_osrelease, "A", "Operating system release");
463 * The osreldate number is copied from the global (osreldate in vers.c) into
464 * prison0 by a sysinit and is inherited by child jails if not changed at jail
465 * creation, so we always return the value from the current prison data.
468 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
472 pr = req->td->td_ucred->cr_prison;
473 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
478 * NOTICE: The *userland* release date is available in
479 * /usr/include/osreldate.h
481 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
482 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
483 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
486 * The build-id is copied from the ELF section .note.gnu.build-id. The linker
487 * script defines two variables to expose the beginning and end. LLVM
488 * currently uses a SHA-1 hash, but other formats can be supported by checking
489 * the length of the section.
492 extern char __build_id_start[];
493 extern char __build_id_end[];
495 #define BUILD_ID_HEADER_LEN 0x10
496 #define BUILD_ID_HASH_MAXLEN 0x14
499 sysctl_build_id(SYSCTL_HANDLER_ARGS)
501 uintptr_t sectionlen = (uintptr_t)(__build_id_end - __build_id_start);
503 char buf[2*BUILD_ID_HASH_MAXLEN+1];
506 * The ELF note section has a four byte length for the vendor name,
507 * four byte length for the value, and a four byte vendor specific
508 * type. The name for the build id is "GNU\0". We skip the first 16
509 * bytes to read the build hash. We will return the remaining bytes up
510 * to 20 (SHA-1) hash size. If the hash happens to be a custom number
511 * of bytes we will pad the value with zeros, as the section should be
514 if (sectionlen <= BUILD_ID_HEADER_LEN ||
515 sectionlen > (BUILD_ID_HEADER_LEN + BUILD_ID_HASH_MAXLEN)) {
520 hashlen = sectionlen - BUILD_ID_HEADER_LEN;
521 for (int i = 0; i < hashlen; i++) {
522 uint8_t c = __build_id_start[i+BUILD_ID_HEADER_LEN];
523 snprintf(&buf[2*i], 3, "%02x", c);
526 return (SYSCTL_OUT(req, buf, strlen(buf) + 1));
529 SYSCTL_PROC(_kern, OID_AUTO, build_id,
530 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
531 NULL, 0, sysctl_build_id, "A", "Operating system build-id");
533 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
535 #ifdef COMPAT_FREEBSD4
536 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
539 #ifdef COMPAT_FREEBSD5
540 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
543 #ifdef COMPAT_FREEBSD6
544 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
547 #ifdef COMPAT_FREEBSD7
548 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
552 * This is really cheating. These actually live in the libc, something
553 * which I'm not quite sure is a good idea anyway, but in order for
554 * getnext and friends to actually work, we define dummies here.
556 * XXXRW: These probably should be CTLFLAG_CAPRD.
558 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
559 "", 0, "PATH that finds all the standard utilities");
560 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
561 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
562 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
563 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
564 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
565 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
566 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
567 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
568 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
569 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
570 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
571 SYSCTL_NULL_INT_PTR, 0, "");
572 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
573 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
574 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
575 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
576 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
577 SYSCTL_NULL_INT_PTR, 0,
578 "The version of POSIX 1003.2 with which the system attempts to comply");
579 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
580 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
581 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
582 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
583 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
584 SYSCTL_NULL_INT_PTR, 0, "");
585 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
586 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
587 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
588 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
589 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
590 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
591 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
592 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
593 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
594 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
595 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
596 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
597 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
598 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
600 #include <sys/vnode.h>
601 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
602 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
604 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
605 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
608 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
613 error = sysctl_handle_int(oidp, &pm, 0, req);
614 if (error || !req->newptr)
616 sx_xlock(&proctree_lock);
617 sx_xlock(&allproc_lock);
620 * Only permit the values less then PID_MAX.
621 * As a safety measure, do not allow to limit the pid_max too much.
623 if (pm < 300 || pm > PID_MAX)
627 sx_xunlock(&allproc_lock);
628 sx_xunlock(&proctree_lock);
631 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
632 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
633 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
637 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
638 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
639 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
640 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
642 #include <sys/user.h>
643 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
644 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
646 /* Used by kernel debuggers. */
647 const int pcb_size = sizeof(struct pcb);
648 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
649 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
651 /* XXX compatibility, remove for 6.0 */
652 #include <sys/imgact.h>
653 #include <sys/imgact_elf.h>
654 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
655 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
656 "compatibility for kern.fallback_elf_brand");