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/sysent.h>
59 #include <sys/vmmeter.h>
60 #include <sys/sysctl.h>
61 #include <sys/systm.h>
62 #include <sys/unistd.h>
64 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
65 "Sysctl internal magic");
66 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 0,
67 "High kernel, proc, limits &c");
68 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
70 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
72 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
73 "Network, (see socket.h)");
74 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
76 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
77 "Sizeof various things");
78 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
80 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
82 SYSCTL_NODE(_machdep, OID_AUTO, mitigations, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
83 "Machine dependent platform mitigations.");
84 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
86 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
87 "p1003_1b, (see p1003_1b.h)");
89 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
90 "Compatibility code");
91 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
94 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
95 "Regression test MIB");
98 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
99 kern_ident, 0, "Kernel identifier");
101 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
102 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision");
104 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
105 version, 0, "Kernel version");
107 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
108 compiler_version, 0, "Version of compiler used to compile kernel");
110 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
111 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
113 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
114 &maxproc, 0, "Maximum number of processes");
116 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
117 &maxprocperuid, 0, "Maximum processes allowed per userid");
119 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
120 &maxusers, 0, "Hint for kernel tuning");
122 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
123 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)");
125 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
126 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to");
128 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN |
129 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0,
130 "Maximum number of supplemental groups a user can belong to");
132 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
133 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available");
135 #ifdef _POSIX_SAVED_IDS
136 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
137 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available");
139 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
140 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available");
143 char kernelname[MAXPATHLEN] = PATH_KERNEL; /* XXX bloat */
145 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE,
146 kernelname, sizeof kernelname, "Name of kernel file booted");
148 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD,
149 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size");
151 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
152 &mp_ncpus, 0, "Number of active CPUs");
154 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
155 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order");
157 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
158 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size");
161 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
166 len = MIN(req->oldlen, sizeof(buf));
167 read_random(buf, len);
168 return (SYSCTL_OUT(req, buf, len));
171 SYSCTL_PROC(_kern, KERN_ARND, arandom,
172 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
173 sysctl_kern_arnd, "", "arc4rand");
176 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
180 p = SIZE_T_MAX >> PAGE_SHIFT;
184 return (sysctl_handle_long(oidp, &val, 0, req));
186 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem,
187 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
188 sysctl_hw_physmem, "LU",
189 "Amount of physical memory (in bytes)");
192 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
196 p = SIZE_T_MAX >> PAGE_SHIFT;
200 return (sysctl_handle_long(oidp, &val, 0, req));
202 SYSCTL_PROC(_hw, HW_REALMEM, realmem,
203 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
204 sysctl_hw_realmem, "LU",
205 "Amount of memory (in bytes) reported by the firmware");
208 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
212 p1 = physmem - vm_wire_count();
213 p = SIZE_T_MAX >> PAGE_SHIFT;
217 return (sysctl_handle_long(oidp, &val, 0, req));
219 SYSCTL_PROC(_hw, HW_USERMEM, usermem,
220 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0,
221 sysctl_hw_usermem, "LU",
222 "Amount of memory (in bytes) which is not wired");
224 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0,
225 "Amount of physical memory (in pages)");
227 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
230 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
235 uint32_t pagesizes32[MAXPAGESIZES];
237 if (req->flags & SCTL_MASK32) {
239 * Recreate the "pagesizes" array with 32-bit elements. Truncate
240 * any page size greater than UINT32_MAX to zero.
242 for (i = 0; i < MAXPAGESIZES; i++)
243 pagesizes32[i] = (uint32_t)pagesizes[i];
245 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
248 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
251 SYSCTL_PROC(_hw, OID_AUTO, pagesizes,
252 CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
253 sysctl_hw_pagesizes, "LU",
254 "Supported page sizes");
256 int adaptive_machine_arch = 1;
257 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
258 &adaptive_machine_arch, 1,
259 "Adapt reported machine architecture to the ABI of the binary");
262 proc_machine_arch(struct proc *p)
265 if (p->p_sysent->sv_machine_arch != NULL)
266 return (p->p_sysent->sv_machine_arch(p));
267 #ifdef COMPAT_FREEBSD32
268 if (SV_PROC_FLAG(p, SV_ILP32))
269 return (MACHINE_ARCH32);
271 return (MACHINE_ARCH);
275 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
277 const char *machine_arch;
279 if (adaptive_machine_arch)
280 machine_arch = proc_machine_arch(curproc);
282 machine_arch = MACHINE_ARCH;
283 return (SYSCTL_OUT(req, machine_arch, strlen(machine_arch) + 1));
285 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD |
286 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A",
287 "System architecture");
289 #ifndef MACHINE_ARCHES
290 #ifdef COMPAT_FREEBSD32
291 #define MACHINE_ARCHES MACHINE_ARCH " " MACHINE_ARCH32
293 #define MACHINE_ARCHES MACHINE_ARCH
297 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE,
298 MACHINE_ARCHES, 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 | CTLFLAG_MPSAFE, 0, 0,
413 sysctl_kern_securelvl, "I",
414 "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");
462 static struct mtx bootid_lk;
463 MTX_SYSINIT(bootid_lock, &bootid_lk, "bootid generator lock", MTX_DEF);
466 sysctl_bootid(SYSCTL_HANDLER_ARGS)
468 static uint8_t boot_id[16];
469 static bool initialized = false;
471 mtx_lock(&bootid_lk);
473 if (!is_random_seeded()) {
474 mtx_unlock(&bootid_lk);
477 arc4random_buf(boot_id, sizeof(boot_id));
480 mtx_unlock(&bootid_lk);
482 return (SYSCTL_OUT(req, boot_id, sizeof(boot_id)));
484 SYSCTL_PROC(_kern, OID_AUTO, boot_id,
485 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD,
486 NULL, 0, sysctl_bootid, "", "Random boot ID");
489 * The osrelease string is copied from the global (osrelease in vers.c) into
490 * prison0 by a sysinit and is inherited by child jails if not changed at jail
491 * creation, so we always return the copy from the current prison data.
494 sysctl_osrelease(SYSCTL_HANDLER_ARGS)
498 pr = req->td->td_ucred->cr_prison;
499 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1));
503 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease,
504 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
505 NULL, 0, sysctl_osrelease, "A", "Operating system release");
508 * The osreldate number is copied from the global (osreldate in vers.c) into
509 * prison0 by a sysinit and is inherited by child jails if not changed at jail
510 * creation, so we always return the value from the current prison data.
513 sysctl_osreldate(SYSCTL_HANDLER_ARGS)
517 pr = req->td->td_ucred->cr_prison;
518 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate)));
523 * NOTICE: The *userland* release date is available in
524 * /usr/include/osreldate.h
526 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate,
527 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
528 NULL, 0, sysctl_osreldate, "I", "Kernel release date");
531 * The build-id is copied from the ELF section .note.gnu.build-id. The linker
532 * script defines two variables to expose the beginning and end. LLVM
533 * currently uses a SHA-1 hash, but other formats can be supported by checking
534 * the length of the section.
537 extern char __build_id_start[];
538 extern char __build_id_end[];
540 #define BUILD_ID_HEADER_LEN 0x10
541 #define BUILD_ID_HASH_MAXLEN 0x14
544 sysctl_build_id(SYSCTL_HANDLER_ARGS)
546 uintptr_t sectionlen = (uintptr_t)(__build_id_end - __build_id_start);
548 char buf[2*BUILD_ID_HASH_MAXLEN+1];
551 * The ELF note section has a four byte length for the vendor name,
552 * four byte length for the value, and a four byte vendor specific
553 * type. The name for the build id is "GNU\0". We skip the first 16
554 * bytes to read the build hash. We will return the remaining bytes up
555 * to 20 (SHA-1) hash size. If the hash happens to be a custom number
556 * of bytes we will pad the value with zeros, as the section should be
559 if (sectionlen <= BUILD_ID_HEADER_LEN ||
560 sectionlen > (BUILD_ID_HEADER_LEN + BUILD_ID_HASH_MAXLEN)) {
564 hashlen = sectionlen - BUILD_ID_HEADER_LEN;
565 for (int i = 0; i < hashlen; i++) {
566 uint8_t c = __build_id_start[i+BUILD_ID_HEADER_LEN];
567 snprintf(&buf[2*i], 3, "%02x", c);
570 return (SYSCTL_OUT(req, buf, strlen(buf) + 1));
573 SYSCTL_PROC(_kern, OID_AUTO, build_id,
574 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE,
575 NULL, 0, sysctl_build_id, "A", "Operating system build-id");
577 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
580 #ifdef COMPAT_FREEBSD4
581 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
584 #ifdef COMPAT_FREEBSD5
585 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
588 #ifdef COMPAT_FREEBSD6
589 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
592 #ifdef COMPAT_FREEBSD7
593 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
597 * This is really cheating. These actually live in the libc, something
598 * which I'm not quite sure is a good idea anyway, but in order for
599 * getnext and friends to actually work, we define dummies here.
601 * XXXRW: These probably should be CTLFLAG_CAPRD.
603 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
604 "", 0, "PATH that finds all the standard utilities");
605 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
606 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)");
607 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
608 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)");
609 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
610 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)");
611 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
612 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)");
613 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
614 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
615 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD,
616 SYSCTL_NULL_INT_PTR, 0, "");
617 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
618 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line");
619 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
620 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted");
621 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
622 SYSCTL_NULL_INT_PTR, 0,
623 "The version of POSIX 1003.2 with which the system attempts to comply");
624 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
625 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option");
626 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
627 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option");
628 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
629 SYSCTL_NULL_INT_PTR, 0, "");
630 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
631 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities");
632 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
633 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities");
634 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
635 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales");
636 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
637 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities");
638 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
639 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities");
640 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
641 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time");
642 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
643 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names");
645 #include <sys/vnode.h>
646 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
647 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)");
649 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
650 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)");
653 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
658 error = sysctl_handle_int(oidp, &pm, 0, req);
659 if (error || !req->newptr)
661 sx_xlock(&proctree_lock);
662 sx_xlock(&allproc_lock);
665 * Only permit the values less then PID_MAX.
666 * As a safety measure, do not allow to limit the pid_max too much.
668 if (pm < 300 || pm > PID_MAX)
672 sx_xunlock(&allproc_lock);
673 sx_xunlock(&proctree_lock);
676 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT |
677 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE,
678 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid");
682 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
683 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)");
684 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
685 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)");
687 #include <sys/user.h>
688 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
689 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
691 /* Used by kernel debuggers. */
692 const int pcb_size = sizeof(struct pcb);
693 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD,
694 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)");
696 /* XXX compatibility, remove for 6.0 */
697 #include <sys/imgact.h>
698 #include <sys/imgact_elf.h>
699 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
700 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
701 "compatibility for kern.fallback_elf_brand");