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_NODE(_machdep, OID_AUTO, mitigations, CTLFLAG_RW, 0,
82 "Machine dependent platform mitigations.");
83 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0,
85 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
86 "p1003_1b, (see p1003_1b.h)");
88 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0,
89 "Compatibility code");
90 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0,
93 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0,
94 "Regression test MIB");
97 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
98 kern_ident, 0, "Kernel identifier");
100 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
101 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
103 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
104 version, 0, "Kernel version");
106 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
107 compiler_version, 0, "Version of compiler used to compile kernel");
109 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
110 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
112 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
113 &maxproc, 0, "Maximum number of processes");
115 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
116 &maxprocperuid, 0, "Maximum processes allowed per userid");
118 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
119 &maxusers, 0, "Hint for kernel tuning");
121 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
122 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
124 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
125 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
127 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
128 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
129 "Maximum number of supplemental groups a user can belong to");
131 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
132 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
134 #ifdef _POSIX_SAVED_IDS
135 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
136 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
138 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
139 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
142 char kernelname[MAXPATHLEN] = PATH_KERNEL; /* XXX bloat */
144 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE,
145 kernelname, sizeof kernelname, "Name of kernel file booted");
147 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD,
148 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size");
150 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
151 &mp_ncpus, 0, "Number of active CPUs");
153 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
154 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
156 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
157 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
160 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
166 * This is one of the very few legitimate uses of read_random(9).
167 * Use of arc4random(9) is not recommended as that will ignore
168 * an unsafe (i.e. unseeded) random(4).
170 * If random(4) is not seeded, then this returns 0, so the
171 * sysctl will return a zero-length buffer.
173 len = read_random(buf, MIN(req->oldlen, sizeof(buf)));
174 return (SYSCTL_OUT(req, buf, len));
177 SYSCTL_PROC(_kern, KERN_ARND, arandom,
178 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
179 sysctl_kern_arnd, "", "arc4rand");
182 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
186 p = SIZE_T_MAX >> PAGE_SHIFT;
190 return (sysctl_handle_long(oidp, &val, 0, req));
192 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
193 0, 0, sysctl_hw_physmem, "LU",
194 "Amount of physical memory (in bytes)");
197 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
201 p = SIZE_T_MAX >> PAGE_SHIFT;
205 return (sysctl_handle_long(oidp, &val, 0, req));
207 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
208 0, 0, sysctl_hw_realmem, "LU",
209 "Amount of memory (in bytes) reported by the firmware");
212 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
216 p1 = physmem - vm_wire_count();
217 p = SIZE_T_MAX >> PAGE_SHIFT;
221 return (sysctl_handle_long(oidp, &val, 0, req));
223 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
224 0, 0, sysctl_hw_usermem, "LU",
225 "Amount of memory (in bytes) which is not wired");
227 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0,
228 "Amount of physical memory (in pages)");
230 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
233 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
239 uint32_t pagesizes32[MAXPAGESIZES];
241 if (req->flags & SCTL_MASK32) {
243 * Recreate the "pagesizes" array with 32-bit elements. Truncate
244 * any page size greater than UINT32_MAX to zero.
246 for (i = 0; i < MAXPAGESIZES; i++)
247 pagesizes32[i] = (uint32_t)pagesizes[i];
249 len = sizeof(pagesizes32);
250 if (len > req->oldlen)
252 error = SYSCTL_OUT(req, pagesizes32, len);
256 len = sizeof(pagesizes);
257 if (len > req->oldlen)
259 error = SYSCTL_OUT(req, pagesizes, len);
263 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
264 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
267 int adaptive_machine_arch = 1;
268 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
269 &adaptive_machine_arch, 1,
270 "Adapt reported machine architecture to the ABI of the binary");
274 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
277 static const char machine_arch[] = MACHINE_ARCH;
279 static const char machine_arch32[] = MACHINE_ARCH32;
281 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
282 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
285 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
289 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
290 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
291 "System architecture");
293 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
294 #ifdef COMPAT_FREEBSD32
295 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
297 MACHINE_ARCH, 0, "Supported architectures for binaries");
301 sysctl_hostname(SYSCTL_HANDLER_ARGS)
303 struct prison *pr, *cpr;
305 char tmpname[MAXHOSTNAMELEN];
306 int descend, error, len;
309 * This function can set: hostname domainname hostuuid.
310 * Keep that in mind when comments say "hostname".
312 pr_offset = (size_t)arg1;
314 KASSERT(len <= sizeof(tmpname),
315 ("length %d too long for %s", len, __func__));
317 pr = req->td->td_ucred->cr_prison;
318 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
321 * Make a local copy of hostname to get/set so we don't have to hold
322 * the jail mutex during the sysctl copyin/copyout activities.
324 mtx_lock(&pr->pr_mtx);
325 bcopy((char *)pr + pr_offset, tmpname, len);
326 mtx_unlock(&pr->pr_mtx);
328 error = sysctl_handle_string(oidp, tmpname, len, req);
330 if (req->newptr != NULL && error == 0) {
332 * Copy the locally set hostname to all jails that share
335 sx_slock(&allprison_lock);
336 while (!(pr->pr_flags & PR_HOST))
338 mtx_lock(&pr->pr_mtx);
339 bcopy(tmpname, (char *)pr + pr_offset, len);
340 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
341 if (cpr->pr_flags & PR_HOST)
344 bcopy(tmpname, (char *)cpr + pr_offset, len);
345 mtx_unlock(&pr->pr_mtx);
346 sx_sunlock(&allprison_lock);
351 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
352 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
353 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
354 sysctl_hostname, "A", "Hostname");
355 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
356 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
357 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
358 sysctl_hostname, "A", "Name of the current YP/NIS domain");
359 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
360 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
361 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
362 sysctl_hostname, "A", "Host UUID");
364 static int regression_securelevel_nonmonotonic = 0;
367 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
368 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
372 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
374 struct prison *pr, *cpr;
375 int descend, error, level;
377 pr = req->td->td_ucred->cr_prison;
380 * Reading the securelevel is easy, since the current jail's level
381 * is known to be at least as secure as any higher levels. Perform
382 * a lockless read since the securelevel is an integer.
384 level = pr->pr_securelevel;
385 error = sysctl_handle_int(oidp, &level, 0, req);
386 if (error || !req->newptr)
388 /* Permit update only if the new securelevel exceeds the old. */
389 sx_slock(&allprison_lock);
390 mtx_lock(&pr->pr_mtx);
391 if (!regression_securelevel_nonmonotonic &&
392 level < pr->pr_securelevel) {
393 mtx_unlock(&pr->pr_mtx);
394 sx_sunlock(&allprison_lock);
397 pr->pr_securelevel = level;
399 * Set all child jails to be at least this level, but do not lower
400 * them (even if regression_securelevel_nonmonotonic).
402 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
403 if (cpr->pr_securelevel < level)
404 cpr->pr_securelevel = level;
406 mtx_unlock(&pr->pr_mtx);
407 sx_sunlock(&allprison_lock);
411 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
412 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
413 "I", "Current secure level");
415 #ifdef INCLUDE_CONFIG_FILE
416 /* Actual kernel configuration options. */
417 extern char kernconfstring[];
419 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE,
420 kernconfstring, 0, "Kernel configuration file");
424 sysctl_hostid(SYSCTL_HANDLER_ARGS)
426 struct prison *pr, *cpr;
431 * Like sysctl_hostname, except it operates on a u_long
432 * instead of a string, and is used only for hostid.
434 pr = req->td->td_ucred->cr_prison;
435 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
437 tmpid = pr->pr_hostid;
438 error = sysctl_handle_long(oidp, &tmpid, 0, req);
440 if (req->newptr != NULL && error == 0) {
441 sx_slock(&allprison_lock);
442 while (!(pr->pr_flags & PR_HOST))
444 mtx_lock(&pr->pr_mtx);
445 pr->pr_hostid = tmpid;
446 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
447 if (cpr->pr_flags & PR_HOST)
450 cpr->pr_hostid = tmpid;
451 mtx_unlock(&pr->pr_mtx);
452 sx_sunlock(&allprison_lock);
457 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
458 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
459 NULL, 0, sysctl_hostid, "LU", "Host ID");
462 * The osrelease string is copied from the global (osrelease in vers.c) into
463 * prison0 by a sysinit and is inherited by child jails if not changed at jail
464 * creation, so we always return the copy from the current prison data.
467 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
471 pr = req->td->td_ucred->cr_prison;
472 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
476 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
477 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
478 NULL, 0, sysctl_osrelease, "A", "Operating system release");
481 * The osreldate number is copied from the global (osreldate in vers.c) into
482 * prison0 by a sysinit and is inherited by child jails if not changed at jail
483 * creation, so we always return the value from the current prison data.
486 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
490 pr = req->td->td_ucred->cr_prison;
491 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
496 * NOTICE: The *userland* release date is available in
497 * /usr/include/osreldate.h
499 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
500 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
501 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
504 * The build-id is copied from the ELF section .note.gnu.build-id. The linker
505 * script defines two variables to expose the beginning and end. LLVM
506 * currently uses a SHA-1 hash, but other formats can be supported by checking
507 * the length of the section.
510 extern char __build_id_start[];
511 extern char __build_id_end[];
513 #define BUILD_ID_HEADER_LEN 0x10
514 #define BUILD_ID_HASH_MAXLEN 0x14
517 sysctl_build_id(SYSCTL_HANDLER_ARGS)
519 uintptr_t sectionlen = (uintptr_t)(__build_id_end - __build_id_start);
521 char buf[2*BUILD_ID_HASH_MAXLEN+1];
524 * The ELF note section has a four byte length for the vendor name,
525 * four byte length for the value, and a four byte vendor specific
526 * type. The name for the build id is "GNU\0". We skip the first 16
527 * bytes to read the build hash. We will return the remaining bytes up
528 * to 20 (SHA-1) hash size. If the hash happens to be a custom number
529 * of bytes we will pad the value with zeros, as the section should be
532 if (sectionlen <= BUILD_ID_HEADER_LEN ||
533 sectionlen > (BUILD_ID_HEADER_LEN + BUILD_ID_HASH_MAXLEN)) {
538 hashlen = sectionlen - BUILD_ID_HEADER_LEN;
539 for (int i = 0; i < hashlen; i++) {
540 uint8_t c = __build_id_start[i+BUILD_ID_HEADER_LEN];
541 snprintf(&buf[2*i], 3, "%02x", c);
544 return (SYSCTL_OUT(req, buf, strlen(buf) + 1));
547 SYSCTL_PROC(_kern, OID_AUTO, build_id,
548 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
549 NULL, 0, sysctl_build_id, "A", "Operating system build-id");
551 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
553 #ifdef COMPAT_FREEBSD4
554 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
557 #ifdef COMPAT_FREEBSD5
558 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
561 #ifdef COMPAT_FREEBSD6
562 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
565 #ifdef COMPAT_FREEBSD7
566 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
570 * This is really cheating. These actually live in the libc, something
571 * which I'm not quite sure is a good idea anyway, but in order for
572 * getnext and friends to actually work, we define dummies here.
574 * XXXRW: These probably should be CTLFLAG_CAPRD.
576 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
577 "", 0, "PATH that finds all the standard utilities");
578 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
579 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
580 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
581 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
582 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
583 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
584 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
585 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
586 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
587 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
588 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
589 SYSCTL_NULL_INT_PTR, 0, "");
590 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
591 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
592 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
593 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
594 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
595 SYSCTL_NULL_INT_PTR, 0,
596 "The version of POSIX 1003.2 with which the system attempts to comply");
597 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
598 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
599 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
600 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
601 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
602 SYSCTL_NULL_INT_PTR, 0, "");
603 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
604 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
605 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
606 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
607 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
608 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
609 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
610 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
611 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
612 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
613 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
614 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
615 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
616 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
618 #include <sys/vnode.h>
619 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
620 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
622 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
623 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
626 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
631 error = sysctl_handle_int(oidp, &pm, 0, req);
632 if (error || !req->newptr)
634 sx_xlock(&proctree_lock);
635 sx_xlock(&allproc_lock);
638 * Only permit the values less then PID_MAX.
639 * As a safety measure, do not allow to limit the pid_max too much.
641 if (pm < 300 || pm > PID_MAX)
645 sx_xunlock(&allproc_lock);
646 sx_xunlock(&proctree_lock);
649 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
650 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
651 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
655 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
656 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
657 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
658 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
660 #include <sys/user.h>
661 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
662 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
664 /* Used by kernel debuggers. */
665 const int pcb_size = sizeof(struct pcb);
666 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
667 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
669 /* XXX compatibility, remove for 6.0 */
670 #include <sys/imgact.h>
671 #include <sys/imgact_elf.h>
672 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
673 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
674 "compatibility for kern.fallback_elf_brand");