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.
244 * Truncate any page size greater than UINT32_MAX to zero,
245 * which assumes that page sizes are powers of two.
247 for (i = 0; i < MAXPAGESIZES; i++)
248 pagesizes32[i] = (uint32_t)pagesizes[i];
250 len = sizeof(pagesizes32);
251 if (len > req->oldlen)
253 error = SYSCTL_OUT(req, pagesizes32, len);
257 len = sizeof(pagesizes);
258 if (len > req->oldlen)
260 error = SYSCTL_OUT(req, pagesizes, len);
264 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
265 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
268 int adaptive_machine_arch = 1;
269 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
270 &adaptive_machine_arch, 1,
271 "Adapt reported machine architecture to the ABI of the binary");
275 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
278 static const char machine_arch[] = MACHINE_ARCH;
280 static const char machine_arch32[] = MACHINE_ARCH32;
282 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
283 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
286 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
290 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
291 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
292 "System architecture");
294 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
295 #ifdef COMPAT_FREEBSD32
296 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries");
298 MACHINE_ARCH, 0, "Supported architectures for binaries");
302 sysctl_hostname(SYSCTL_HANDLER_ARGS)
304 struct prison *pr, *cpr;
306 char tmpname[MAXHOSTNAMELEN];
307 int descend, error, len;
310 * This function can set: hostname domainname hostuuid.
311 * Keep that in mind when comments say "hostname".
313 pr_offset = (size_t)arg1;
315 KASSERT(len <= sizeof(tmpname),
316 ("length %d too long for %s", len, __func__));
318 pr = req->td->td_ucred->cr_prison;
319 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
322 * Make a local copy of hostname to get/set so we don't have to hold
323 * the jail mutex during the sysctl copyin/copyout activities.
325 mtx_lock(&pr->pr_mtx);
326 bcopy((char *)pr + pr_offset, tmpname, len);
327 mtx_unlock(&pr->pr_mtx);
329 error = sysctl_handle_string(oidp, tmpname, len, req);
331 if (req->newptr != NULL && error == 0) {
333 * Copy the locally set hostname to all jails that share
336 sx_slock(&allprison_lock);
337 while (!(pr->pr_flags & PR_HOST))
339 mtx_lock(&pr->pr_mtx);
340 bcopy(tmpname, (char *)pr + pr_offset, len);
341 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
342 if (cpr->pr_flags & PR_HOST)
345 bcopy(tmpname, (char *)cpr + pr_offset, len);
346 mtx_unlock(&pr->pr_mtx);
347 sx_sunlock(&allprison_lock);
352 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
353 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
354 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
355 sysctl_hostname, "A", "Hostname");
356 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
357 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
358 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
359 sysctl_hostname, "A", "Name of the current YP/NIS domain");
360 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
361 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
362 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
363 sysctl_hostname, "A", "Host UUID");
365 static int regression_securelevel_nonmonotonic = 0;
368 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
369 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
373 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
375 struct prison *pr, *cpr;
376 int descend, error, level;
378 pr = req->td->td_ucred->cr_prison;
381 * Reading the securelevel is easy, since the current jail's level
382 * is known to be at least as secure as any higher levels. Perform
383 * a lockless read since the securelevel is an integer.
385 level = pr->pr_securelevel;
386 error = sysctl_handle_int(oidp, &level, 0, req);
387 if (error || !req->newptr)
389 /* Permit update only if the new securelevel exceeds the old. */
390 sx_slock(&allprison_lock);
391 mtx_lock(&pr->pr_mtx);
392 if (!regression_securelevel_nonmonotonic &&
393 level < pr->pr_securelevel) {
394 mtx_unlock(&pr->pr_mtx);
395 sx_sunlock(&allprison_lock);
398 pr->pr_securelevel = level;
400 * Set all child jails to be at least this level, but do not lower
401 * them (even if regression_securelevel_nonmonotonic).
403 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
404 if (cpr->pr_securelevel < level)
405 cpr->pr_securelevel = level;
407 mtx_unlock(&pr->pr_mtx);
408 sx_sunlock(&allprison_lock);
412 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
413 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
414 "I", "Current secure level");
416 #ifdef INCLUDE_CONFIG_FILE
417 /* Actual kernel configuration options. */
418 extern char kernconfstring[];
420 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE,
421 kernconfstring, 0, "Kernel configuration file");
425 sysctl_hostid(SYSCTL_HANDLER_ARGS)
427 struct prison *pr, *cpr;
432 * Like sysctl_hostname, except it operates on a u_long
433 * instead of a string, and is used only for hostid.
435 pr = req->td->td_ucred->cr_prison;
436 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
438 tmpid = pr->pr_hostid;
439 error = sysctl_handle_long(oidp, &tmpid, 0, req);
441 if (req->newptr != NULL && error == 0) {
442 sx_slock(&allprison_lock);
443 while (!(pr->pr_flags & PR_HOST))
445 mtx_lock(&pr->pr_mtx);
446 pr->pr_hostid = tmpid;
447 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
448 if (cpr->pr_flags & PR_HOST)
451 cpr->pr_hostid = tmpid;
452 mtx_unlock(&pr->pr_mtx);
453 sx_sunlock(&allprison_lock);
458 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
459 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
460 NULL, 0, sysctl_hostid, "LU", "Host ID");
463 * The osrelease string is copied from the global (osrelease 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 copy from the current prison data.
468 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
472 pr = req->td->td_ucred->cr_prison;
473 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
477 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
478 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
479 NULL, 0, sysctl_osrelease, "A", "Operating system release");
482 * The osreldate number is copied from the global (osreldate in vers.c) into
483 * prison0 by a sysinit and is inherited by child jails if not changed at jail
484 * creation, so we always return the value from the current prison data.
487 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
491 pr = req->td->td_ucred->cr_prison;
492 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
497 * NOTICE: The *userland* release date is available in
498 * /usr/include/osreldate.h
500 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
501 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
502 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
505 * The build-id is copied from the ELF section .note.gnu.build-id. The linker
506 * script defines two variables to expose the beginning and end. LLVM
507 * currently uses a SHA-1 hash, but other formats can be supported by checking
508 * the length of the section.
511 extern char __build_id_start[];
512 extern char __build_id_end[];
514 #define BUILD_ID_HEADER_LEN 0x10
515 #define BUILD_ID_HASH_MAXLEN 0x14
518 sysctl_build_id(SYSCTL_HANDLER_ARGS)
520 uintptr_t sectionlen = (uintptr_t)(__build_id_end - __build_id_start);
522 char buf[2*BUILD_ID_HASH_MAXLEN+1];
525 * The ELF note section has a four byte length for the vendor name,
526 * four byte length for the value, and a four byte vendor specific
527 * type. The name for the build id is "GNU\0". We skip the first 16
528 * bytes to read the build hash. We will return the remaining bytes up
529 * to 20 (SHA-1) hash size. If the hash happens to be a custom number
530 * of bytes we will pad the value with zeros, as the section should be
533 if (sectionlen <= BUILD_ID_HEADER_LEN ||
534 sectionlen > (BUILD_ID_HEADER_LEN + BUILD_ID_HASH_MAXLEN)) {
539 hashlen = sectionlen - BUILD_ID_HEADER_LEN;
540 for (int i = 0; i < hashlen; i++) {
541 uint8_t c = __build_id_start[i+BUILD_ID_HEADER_LEN];
542 snprintf(&buf[2*i], 3, "%02x", c);
545 return (SYSCTL_OUT(req, buf, strlen(buf) + 1));
548 SYSCTL_PROC(_kern, OID_AUTO, build_id,
549 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
550 NULL, 0, sysctl_build_id, "A", "Operating system build-id");
552 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
554 #ifdef COMPAT_FREEBSD4
555 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
558 #ifdef COMPAT_FREEBSD5
559 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
562 #ifdef COMPAT_FREEBSD6
563 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
566 #ifdef COMPAT_FREEBSD7
567 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
571 * This is really cheating. These actually live in the libc, something
572 * which I'm not quite sure is a good idea anyway, but in order for
573 * getnext and friends to actually work, we define dummies here.
575 * XXXRW: These probably should be CTLFLAG_CAPRD.
577 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
578 "", 0, "PATH that finds all the standard utilities");
579 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
580 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
581 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
582 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
583 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
584 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
585 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
586 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
587 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
588 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
589 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
590 SYSCTL_NULL_INT_PTR, 0, "");
591 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
592 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
593 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
594 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
595 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
596 SYSCTL_NULL_INT_PTR, 0,
597 "The version of POSIX 1003.2 with which the system attempts to comply");
598 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
599 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
600 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
601 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
602 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
603 SYSCTL_NULL_INT_PTR, 0, "");
604 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
605 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
606 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
607 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
608 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
609 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
610 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
611 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
612 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
613 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
614 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
615 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
616 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
617 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
619 #include <sys/vnode.h>
620 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
621 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
623 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
624 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
627 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
632 error = sysctl_handle_int(oidp, &pm, 0, req);
633 if (error || !req->newptr)
635 sx_xlock(&proctree_lock);
636 sx_xlock(&allproc_lock);
639 * Only permit the values less then PID_MAX.
640 * As a safety measure, do not allow to limit the pid_max too much.
642 if (pm < 300 || pm > PID_MAX)
646 sx_xunlock(&allproc_lock);
647 sx_xunlock(&proctree_lock);
650 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
651 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
652 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
656 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
657 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
658 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
659 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
661 #include <sys/user.h>
662 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
663 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
665 /* Used by kernel debuggers. */
666 const int pcb_size = sizeof(struct pcb);
667 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
668 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
670 /* XXX compatibility, remove for 6.0 */
671 #include <sys/imgact.h>
672 #include <sys/imgact_elf.h>
673 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
674 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
675 "compatibility for kern.fallback_elf_brand");