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>
50 #include <sys/kernel.h>
51 #include <sys/limits.h>
53 #include <sys/mutex.h>
55 #include <sys/random.h>
59 #include <sys/sysent.h>
60 #include <sys/vmmeter.h>
61 #include <sys/sysctl.h>
62 #include <sys/systm.h>
63 #include <sys/unistd.h>
65 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
66 "Sysctl internal magic");
67 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 0,
68 "High kernel, proc, limits &c");
69 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
71 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
73 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
74 "Network, (see socket.h)");
75 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
77 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
78 "Sizeof various things");
79 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
81 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
83 SYSCTL_NODE(_machdep, OID_AUTO, mitigations, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
84 "Machine dependent platform mitigations.");
85 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
87 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
88 "p1003_1b, (see p1003_1b.h)");
90 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
91 "Compatibility code");
92 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
95 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
96 "Regression test MIB");
99 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
100 kern_ident, 0, "Kernel identifier");
102 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
103 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
105 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
106 version, 0, "Kernel version");
108 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
109 compiler_version, 0, "Version of compiler used to compile kernel");
111 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
112 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
114 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
115 &maxproc, 0, "Maximum number of processes");
117 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
118 &maxprocperuid, 0, "Maximum processes allowed per userid");
120 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
121 &maxusers, 0, "Hint for kernel tuning");
123 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
124 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
126 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
127 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
129 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
130 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
131 "Maximum number of supplemental groups a user can belong to");
133 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
134 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
136 #ifdef _POSIX_SAVED_IDS
137 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
138 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
140 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
141 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
144 char kernelname[MAXPATHLEN] = PATH_KERNEL; /* XXX bloat */
146 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE,
147 kernelname, sizeof kernelname, "Name of kernel file booted");
149 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD,
150 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size");
152 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
153 &mp_ncpus, 0, "Number of active CPUs");
155 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
156 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
158 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
159 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
162 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
167 len = MIN(req->oldlen, sizeof(buf));
168 read_random(buf, len);
169 return (SYSCTL_OUT(req, buf, len));
172 SYSCTL_PROC(_kern, KERN_ARND, arandom,
173 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
174 sysctl_kern_arnd, "", "arc4rand");
177 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
181 p = SIZE_T_MAX >> PAGE_SHIFT;
185 return (sysctl_handle_long(oidp, &val, 0, req));
187 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem,
188 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
189 sysctl_hw_physmem, "LU",
190 "Amount of physical memory (in bytes)");
193 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
197 p = SIZE_T_MAX >> PAGE_SHIFT;
201 return (sysctl_handle_long(oidp, &val, 0, req));
203 SYSCTL_PROC(_hw, HW_REALMEM, realmem,
204 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
205 sysctl_hw_realmem, "LU",
206 "Amount of memory (in bytes) reported by the firmware");
209 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
213 p1 = physmem - vm_wire_count();
214 p = SIZE_T_MAX >> PAGE_SHIFT;
218 return (sysctl_handle_long(oidp, &val, 0, req));
220 SYSCTL_PROC(_hw, HW_USERMEM, usermem,
221 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
222 sysctl_hw_usermem, "LU",
223 "Amount of memory (in bytes) which is not wired");
225 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0,
226 "Amount of physical memory (in pages)");
228 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
231 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
237 uint32_t pagesizes32[MAXPAGESIZES];
239 if (req->flags & SCTL_MASK32) {
241 * Recreate the "pagesizes" array with 32-bit elements.
242 * Truncate any page size greater than UINT32_MAX to zero,
243 * which assumes that page sizes are powers of two.
245 for (i = 0; i < MAXPAGESIZES; i++)
246 pagesizes32[i] = (uint32_t)pagesizes[i];
248 len = sizeof(pagesizes32);
249 if (len > req->oldlen && req->oldptr != NULL)
251 error = SYSCTL_OUT(req, pagesizes32, len);
255 len = sizeof(pagesizes);
256 if (len > req->oldlen && req->oldptr != NULL)
258 error = SYSCTL_OUT(req, pagesizes, len);
262 SYSCTL_PROC(_hw, OID_AUTO, pagesizes,
263 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
264 sysctl_hw_pagesizes, "S,pagesizes",
265 "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");
273 proc_machine_arch(struct proc *p)
276 if (p->p_sysent->sv_machine_arch != NULL)
277 return (p->p_sysent->sv_machine_arch(p));
278 #ifdef COMPAT_FREEBSD32
279 if (SV_PROC_FLAG(p, SV_ILP32))
280 return (MACHINE_ARCH32);
282 return (MACHINE_ARCH);
286 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
288 const char *machine_arch;
290 if (adaptive_machine_arch)
291 machine_arch = proc_machine_arch(curproc);
293 machine_arch = MACHINE_ARCH;
294 return (SYSCTL_OUT(req, machine_arch, strlen(machine_arch) + 1));
296 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
297 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
298 "System architecture");
300 #ifndef MACHINE_ARCHES
301 #ifdef COMPAT_FREEBSD32
302 #define MACHINE_ARCHES MACHINE_ARCH " " MACHINE_ARCH32
304 #define MACHINE_ARCHES MACHINE_ARCH
308 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
309 MACHINE_ARCHES, 0, "Supported architectures for binaries");
312 sysctl_hostname(SYSCTL_HANDLER_ARGS)
314 struct prison *pr, *cpr;
316 char tmpname[MAXHOSTNAMELEN];
317 int descend, error, len;
320 * This function can set: hostname domainname hostuuid.
321 * Keep that in mind when comments say "hostname".
323 pr_offset = (size_t)arg1;
325 KASSERT(len <= sizeof(tmpname),
326 ("length %d too long for %s", len, __func__));
328 pr = req->td->td_ucred->cr_prison;
329 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
332 * Make a local copy of hostname to get/set so we don't have to hold
333 * the jail mutex during the sysctl copyin/copyout activities.
335 mtx_lock(&pr->pr_mtx);
336 bcopy((char *)pr + pr_offset, tmpname, len);
337 mtx_unlock(&pr->pr_mtx);
339 error = sysctl_handle_string(oidp, tmpname, len, req);
341 if (req->newptr != NULL && error == 0) {
343 * Copy the locally set hostname to all jails that share
346 sx_slock(&allprison_lock);
347 while (!(pr->pr_flags & PR_HOST))
349 mtx_lock(&pr->pr_mtx);
350 bcopy(tmpname, (char *)pr + pr_offset, len);
351 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
352 if (cpr->pr_flags & PR_HOST)
355 bcopy(tmpname, (char *)cpr + pr_offset, len);
356 mtx_unlock(&pr->pr_mtx);
357 sx_sunlock(&allprison_lock);
362 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
363 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
364 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
365 sysctl_hostname, "A", "Hostname");
366 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
367 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
368 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
369 sysctl_hostname, "A", "Name of the current YP/NIS domain");
370 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
371 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE,
372 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
373 sysctl_hostname, "A", "Host UUID");
375 static int regression_securelevel_nonmonotonic = 0;
378 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
379 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
383 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
385 struct prison *pr, *cpr;
386 int descend, error, level;
388 pr = req->td->td_ucred->cr_prison;
391 * Reading the securelevel is easy, since the current jail's level
392 * is known to be at least as secure as any higher levels. Perform
393 * a lockless read since the securelevel is an integer.
395 level = pr->pr_securelevel;
396 error = sysctl_handle_int(oidp, &level, 0, req);
397 if (error || !req->newptr)
399 /* Permit update only if the new securelevel exceeds the old. */
400 sx_slock(&allprison_lock);
401 mtx_lock(&pr->pr_mtx);
402 if (!regression_securelevel_nonmonotonic &&
403 level < pr->pr_securelevel) {
404 mtx_unlock(&pr->pr_mtx);
405 sx_sunlock(&allprison_lock);
408 pr->pr_securelevel = level;
410 * Set all child jails to be at least this level, but do not lower
411 * them (even if regression_securelevel_nonmonotonic).
413 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
414 if (cpr->pr_securelevel < level)
415 cpr->pr_securelevel = level;
417 mtx_unlock(&pr->pr_mtx);
418 sx_sunlock(&allprison_lock);
422 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
423 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 0, 0,
424 sysctl_kern_securelvl, "I",
425 "Current secure level");
427 #ifdef INCLUDE_CONFIG_FILE
428 /* Actual kernel configuration options. */
429 extern char kernconfstring[];
431 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE,
432 kernconfstring, 0, "Kernel configuration file");
436 sysctl_hostid(SYSCTL_HANDLER_ARGS)
438 struct prison *pr, *cpr;
443 * Like sysctl_hostname, except it operates on a u_long
444 * instead of a string, and is used only for hostid.
446 pr = req->td->td_ucred->cr_prison;
447 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
449 tmpid = pr->pr_hostid;
450 error = sysctl_handle_long(oidp, &tmpid, 0, req);
452 if (req->newptr != NULL && error == 0) {
453 sx_slock(&allprison_lock);
454 while (!(pr->pr_flags & PR_HOST))
456 mtx_lock(&pr->pr_mtx);
457 pr->pr_hostid = tmpid;
458 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
459 if (cpr->pr_flags & PR_HOST)
462 cpr->pr_hostid = tmpid;
463 mtx_unlock(&pr->pr_mtx);
464 sx_sunlock(&allprison_lock);
469 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
470 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
471 NULL, 0, sysctl_hostid, "LU", "Host ID");
473 static struct mtx bootid_lk;
474 MTX_SYSINIT(bootid_lock, &bootid_lk, "bootid generator lock", MTX_DEF);
477 sysctl_bootid(SYSCTL_HANDLER_ARGS)
479 static uint8_t boot_id[16];
480 static bool initialized = false;
482 mtx_lock(&bootid_lk);
484 if (!is_random_seeded()) {
485 mtx_unlock(&bootid_lk);
488 arc4random_buf(boot_id, sizeof(boot_id));
491 mtx_unlock(&bootid_lk);
493 return (SYSCTL_OUT(req, boot_id, sizeof(boot_id)));
495 SYSCTL_PROC(_kern, OID_AUTO, boot_id,
496 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
497 NULL, 0, sysctl_bootid, "", "Random boot ID");
500 * The osrelease string is copied from the global (osrelease in vers.c) into
501 * prison0 by a sysinit and is inherited by child jails if not changed at jail
502 * creation, so we always return the copy from the current prison data.
505 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
509 pr = req->td->td_ucred->cr_prison;
510 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
514 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
515 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
516 NULL, 0, sysctl_osrelease, "A", "Operating system release");
519 * The osreldate number is copied from the global (osreldate in vers.c) into
520 * prison0 by a sysinit and is inherited by child jails if not changed at jail
521 * creation, so we always return the value from the current prison data.
524 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
528 pr = req->td->td_ucred->cr_prison;
529 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
534 * NOTICE: The *userland* release date is available in
535 * /usr/include/osreldate.h
537 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
538 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
539 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
542 * The build-id is copied from the ELF section .note.gnu.build-id. The linker
543 * script defines two variables to expose the beginning and end. LLVM
544 * currently uses a SHA-1 hash, but other formats can be supported by checking
545 * the length of the section.
548 extern char __build_id_start[];
549 extern char __build_id_end[];
551 #define BUILD_ID_HEADER_LEN 0x10
552 #define BUILD_ID_HASH_MAXLEN 0x14
555 sysctl_build_id(SYSCTL_HANDLER_ARGS)
557 uintptr_t sectionlen = (uintptr_t)(__build_id_end - __build_id_start);
559 char buf[2*BUILD_ID_HASH_MAXLEN+1];
562 * The ELF note section has a four byte length for the vendor name,
563 * four byte length for the value, and a four byte vendor specific
564 * type. The name for the build id is "GNU\0". We skip the first 16
565 * bytes to read the build hash. We will return the remaining bytes up
566 * to 20 (SHA-1) hash size. If the hash happens to be a custom number
567 * of bytes we will pad the value with zeros, as the section should be
570 if (sectionlen <= BUILD_ID_HEADER_LEN ||
571 sectionlen > (BUILD_ID_HEADER_LEN + BUILD_ID_HASH_MAXLEN)) {
575 hashlen = sectionlen - BUILD_ID_HEADER_LEN;
576 for (int i = 0; i < hashlen; i++) {
577 uint8_t c = __build_id_start[i+BUILD_ID_HEADER_LEN];
578 snprintf(&buf[2*i], 3, "%02x", c);
581 return (SYSCTL_OUT(req, buf, strlen(buf) + 1));
584 SYSCTL_PROC(_kern, OID_AUTO, build_id,
585 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
586 NULL, 0, sysctl_build_id, "A", "Operating system build-id");
588 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
591 #ifdef COMPAT_FREEBSD4
592 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
595 #ifdef COMPAT_FREEBSD5
596 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
599 #ifdef COMPAT_FREEBSD6
600 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
603 #ifdef COMPAT_FREEBSD7
604 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
608 * This is really cheating. These actually live in the libc, something
609 * which I'm not quite sure is a good idea anyway, but in order for
610 * getnext and friends to actually work, we define dummies here.
612 * XXXRW: These probably should be CTLFLAG_CAPRD.
614 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
615 "", 0, "PATH that finds all the standard utilities");
616 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
617 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
618 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
619 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
620 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
621 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
622 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
623 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
624 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
625 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
626 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
627 SYSCTL_NULL_INT_PTR, 0, "");
628 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
629 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
630 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
631 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
632 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
633 SYSCTL_NULL_INT_PTR, 0,
634 "The version of POSIX 1003.2 with which the system attempts to comply");
635 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
636 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
637 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
638 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
639 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
640 SYSCTL_NULL_INT_PTR, 0, "");
641 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
642 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
643 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
644 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
645 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
646 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
647 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
648 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
649 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
650 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
651 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
652 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
653 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
654 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
656 static char localbase[MAXPATHLEN] = "";
658 SYSCTL_STRING(_user, USER_LOCALBASE, localbase, CTLFLAG_RWTUN,
659 localbase, sizeof(localbase), "Prefix used to install and locate add-on packages");
661 #include <sys/vnode.h>
662 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
663 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
665 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
666 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
669 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
674 error = sysctl_handle_int(oidp, &pm, 0, req);
675 if (error || !req->newptr)
677 sx_xlock(&proctree_lock);
678 sx_xlock(&allproc_lock);
681 * Only permit the values less then PID_MAX.
682 * As a safety measure, do not allow to limit the pid_max too much.
684 if (pm < 300 || pm > PID_MAX)
688 sx_xunlock(&allproc_lock);
689 sx_xunlock(&proctree_lock);
692 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
693 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
694 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
698 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
699 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
700 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
701 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
703 #include <sys/user.h>
704 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
705 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
707 /* Used by kernel debuggers. */
708 const int pcb_size = sizeof(struct pcb);
709 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
710 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
712 /* XXX compatibility, remove for 6.0 */
713 #include <sys/imgact.h>
714 #include <sys/imgact_elf.h>
715 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
716 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
717 "compatibility for kern.fallback_elf_brand");