2 * Original FreeBSD kern_mib.c modified to only have the symbols needed
5 * \author Thomas Friebel <tf13@os.inf.tu-dresden.de>
9 * Copyright (c) 1982, 1986, 1989, 1993
10 * The Regents of the University of California. All rights reserved.
12 * This code is derived from software contributed to Berkeley by
13 * Mike Karels at Berkeley Software Design, Inc.
15 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
16 * project, to make these variables more userfriendly.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD: src/sys/kern/kern_mib.c,v 1.71.2.2 2005/03/03 00:46:31 wes Exp $");
48 #include "opt_posix.h"
50 #include <sys/param.h>
51 #include <sys/kernel.h>
52 #include <sys/systm.h>
53 #include <sys/sysctl.h>
56 #include <sys/mutex.h>
59 #include <sys/unistd.h>
61 SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
62 "Sysctl internal magic");
63 SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0,
64 "High kernel, proc, limits &c");
65 SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
67 SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0,
69 SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
70 "Network, (see socket.h)");
71 SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
73 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
74 "Sizeof various things");
75 SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
77 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
79 SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
81 SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
82 "p1003_1b, (see p1003_1b.h)");
84 SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
85 "Compatibility code");
86 SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0,
89 SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0,
90 "Regression test MIB");
94 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD,
95 kern_ident, 0, "Kernel identifier");
97 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
98 osrelease, 0, "Operating system release");
100 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
101 0, BSD, "Operating system revision");
103 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
104 version, 0, "Kernel version");
106 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
107 ostype, 0, "Operating system type");
110 * NOTICE: The *userland* release date is available in
111 * /usr/include/osreldate.h
113 extern int osreldate;
114 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
115 &osreldate, 0, "Kernel release date");
117 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN,
118 &maxproc, 0, "Maximum number of processes");
120 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
121 &maxprocperuid, 0, "Maximum processes allowed per userid");
123 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN,
124 &maxusers, 0, "Hint for kernel tuning");
126 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
127 0, ARG_MAX, "Maximum bytes of argument to execve(2)");
129 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
130 0, _POSIX_VERSION, "Version of POSIX attempting to comply to");
132 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
133 0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
135 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
136 0, 1, "Whether job control is available");
138 #ifdef _POSIX_SAVED_IDS
139 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
140 0, 1, "Whether saved set-group/user ID is available");
142 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
143 0, 0, "Whether saved set-group/user ID is available");
146 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
148 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
149 kernelname, sizeof kernelname, "Name of kernel file booted");
152 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
153 &mp_ncpus, 0, "Number of active CPUs");
155 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
156 0, 1, "Number of active CPUs");
159 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
160 0, BYTE_ORDER, "System byte order");
162 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
163 0, PAGE_SIZE, "System memory page size");
166 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
171 return (sysctl_handle_long(oidp, &val, 0, req));
174 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
175 0, 0, sysctl_hw_physmem, "LU", "");
178 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
182 return (sysctl_handle_long(oidp, &val, 0, req));
184 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
185 0, 0, sysctl_hw_realmem, "LU", "");
187 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
191 val = ctob(physmem - cnt.v_wire_count);
192 return (sysctl_handle_long(oidp, &val, 0, req));
195 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
196 0, 0, sysctl_hw_usermem, "LU", "");
198 SYSCTL_ULONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
200 static char machine_arch[] = MACHINE_ARCH;
201 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
202 machine_arch, 0, "System architecture");
204 char hostname[MAXHOSTNAMELEN];
207 sysctl_hostname(SYSCTL_HANDLER_ARGS)
210 char tmphostname[MAXHOSTNAMELEN];
213 pr = req->td->td_ucred->cr_prison;
215 if (!jail_set_hostname_allowed && req->newptr)
218 * Process is in jail, so make a local copy of jail
219 * hostname to get/set so we don't have to hold the jail
220 * mutex during the sysctl copyin/copyout activities.
222 mtx_lock(&pr->pr_mtx);
223 bcopy(pr->pr_host, tmphostname, MAXHOSTNAMELEN);
224 mtx_unlock(&pr->pr_mtx);
226 error = sysctl_handle_string(oidp, tmphostname,
227 sizeof pr->pr_host, req);
229 if (req->newptr != NULL && error == 0) {
231 * Copy the locally set hostname to the jail, if
234 mtx_lock(&pr->pr_mtx);
235 bcopy(tmphostname, pr->pr_host, MAXHOSTNAMELEN);
236 mtx_unlock(&pr->pr_mtx);
239 error = sysctl_handle_string(oidp,
240 hostname, sizeof hostname, req);
244 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
245 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
246 0, 0, sysctl_hostname, "A", "Hostname");
248 static int regression_securelevel_nonmonotonic = 0;
251 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
252 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
255 int securelevel = -1;
256 static struct mtx securelevel_mtx;
258 MTX_SYSINIT(securelevel_lock, &securelevel_mtx, "securelevel mutex lock",
262 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
267 pr = req->td->td_ucred->cr_prison;
270 * If the process is in jail, return the maximum of the global and
271 * local levels; otherwise, return the global level. Perform a
272 * lockless read since the securelevel is an integer.
275 level = imax(securelevel, pr->pr_securelevel);
278 error = sysctl_handle_int(oidp, &level, 0, req);
279 if (error || !req->newptr)
282 * Permit update only if the new securelevel exceeds the
283 * global level, and local level if any.
286 mtx_lock(&pr->pr_mtx);
287 if (!regression_securelevel_nonmonotonic &&
288 (level < imax(securelevel, pr->pr_securelevel))) {
289 mtx_unlock(&pr->pr_mtx);
292 pr->pr_securelevel = level;
293 mtx_unlock(&pr->pr_mtx);
295 mtx_lock(&securelevel_mtx);
296 if (!regression_securelevel_nonmonotonic &&
297 (level < securelevel)) {
298 mtx_unlock(&securelevel_mtx);
302 mtx_unlock(&securelevel_mtx);
307 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
308 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
309 "I", "Current secure level");
311 char domainname[MAXHOSTNAMELEN];
312 SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
313 &domainname, sizeof(domainname), "Name of the current YP/NIS domain");
316 SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
319 * This is really cheating. These actually live in the libc, something
320 * which I'm not quite sure is a good idea anyway, but in order for
321 * getnext and friends to actually work, we define dummies here.
323 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
324 "", 0, "PATH that finds all the standard utilities");
325 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
326 0, 0, "Max ibase/obase values in bc(1)");
327 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
328 0, 0, "Max array size in bc(1)");
329 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
330 0, 0, "Max scale value in bc(1)");
331 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
332 0, 0, "Max string length in bc(1)");
333 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
334 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
335 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
336 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
337 0, 0, "Max length (bytes) of a text-processing utility's input line");
338 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
339 0, 0, "Maximum number of repeats of a regexp permitted");
340 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
342 "The version of POSIX 1003.2 with which the system attempts to comply");
343 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
344 0, 0, "Whether C development supports the C bindings option");
345 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
346 0, 0, "Whether system supports the C development utilities option");
347 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
349 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
350 0, 0, "Whether system supports FORTRAN development utilities");
351 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
352 0, 0, "Whether system supports FORTRAN runtime utilities");
353 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
354 0, 0, "Whether system supports creation of locales");
355 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
356 0, 0, "Whether system supports software development utilities");
357 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
358 0, 0, "Whether system supports the user portability utilities");
359 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
360 0, 0, "Min Maximum number of streams a process may have open at one time");
361 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
362 0, 0, "Min Maximum number of types supported for timezone names");
364 #include <sys/vnode.h>
365 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
366 0, sizeof(struct vnode), "sizeof(struct vnode)");
368 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
369 0, sizeof(struct proc), "sizeof(struct proc)");
371 #include <sys/conf.h>
372 SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD,
373 0, sizeof(struct cdev), "sizeof(struct cdev)");
377 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
378 0, sizeof(struct bio), "sizeof(struct bio)");
379 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
380 0, sizeof(struct buf), "sizeof(struct buf)");
382 #include <sys/user.h>
383 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
384 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
386 /* XXX compatibility, remove for 6.0 */
387 #include <sys/imgact.h>
388 #include <sys/imgact_elf.h>
389 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
390 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
391 "compatibility for kern.fallback_elf_brand");
392 #endif /* DDE_FBSD */