Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_mib.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 11 * project, to make these variables more userfriendly. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 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. 24 * 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 35 * SUCH DAMAGE. 36 * 37 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD: releng/12.0/sys/kern/kern_mib.c 333047 2018-04-27 00:12:00Z manu $"); 42 43 #include "opt_posix.h" 44 #include "opt_config.h" 45 46 #include <sys/param.h> 47 #include <sys/jail.h> 48 #include <sys/kernel.h> 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 #include <sys/proc.h> 52 #include <sys/random.h> 53 #include <sys/sbuf.h> 54 #include <sys/smp.h> 55 #include <sys/sx.h> 56 #include <sys/vmmeter.h> 57 #include <sys/sysctl.h> 58 #include <sys/systm.h> 59 #include <sys/unistd.h> 60 61 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 62 "Sysctl internal magic"); 63 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 64 "High kernel, proc, limits &c"); 65 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 66 "Virtual memory"); 67 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 68 "File system"); 69 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 70 "Network, (see socket.h)"); 71 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 72 "Debugging"); 73 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 74 "Sizeof various things"); 75 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 76 "hardware"); 77 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 78 "machine dependent"); 79 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 80 "user-level"); 81 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 82 "p1003_1b, (see p1003_1b.h)"); 83 84 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 85 "Compatibility code"); 86 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 87 "Security"); 88 #ifdef REGRESSION 89 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 90 "Regression test MIB"); 91 #endif 92 93 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 94 kern_ident, 0, "Kernel identifier"); 95 96 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 97 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 98 99 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 100 version, 0, "Kernel version"); 101 102 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 103 compiler_version, 0, "Version of compiler used to compile kernel"); 104 105 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 106 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 107 108 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 109 &maxproc, 0, "Maximum number of processes"); 110 111 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 112 &maxprocperuid, 0, "Maximum processes allowed per userid"); 113 114 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 115 &maxusers, 0, "Hint for kernel tuning"); 116 117 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 118 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 119 120 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 121 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 122 123 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 124 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 125 "Maximum number of supplemental groups a user can belong to"); 126 127 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 128 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 129 130 #ifdef _POSIX_SAVED_IDS 131 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 132 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 133 #else 134 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 135 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 136 #endif 137 138 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 139 140 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 141 kernelname, sizeof kernelname, "Name of kernel file booted"); 142 143 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, 144 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); 145 146 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 147 &mp_ncpus, 0, "Number of active CPUs"); 148 149 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 150 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 151 152 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 153 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 154 155 static int 156 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 157 { 158 char buf[256]; 159 size_t len; 160 161 /*- 162 * This is one of the very few legitimate uses of read_random(9). 163 * Use of arc4random(9) is not recommended as that will ignore 164 * an unsafe (i.e. unseeded) random(4). 165 * 166 * If random(4) is not seeded, then this returns 0, so the 167 * sysctl will return a zero-length buffer. 168 */ 169 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 170 return (SYSCTL_OUT(req, buf, len)); 171 } 172 173 SYSCTL_PROC(_kern, KERN_ARND, arandom, 174 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 175 sysctl_kern_arnd, "", "arc4rand"); 176 177 static int 178 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 179 { 180 u_long val; 181 182 val = ctob(physmem); 183 return (sysctl_handle_long(oidp, &val, 0, req)); 184 } 185 186 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 187 0, 0, sysctl_hw_physmem, "LU", ""); 188 189 static int 190 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 191 { 192 u_long val; 193 val = ctob(realmem); 194 return (sysctl_handle_long(oidp, &val, 0, req)); 195 } 196 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 197 0, 0, sysctl_hw_realmem, "LU", ""); 198 static int 199 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 200 { 201 u_long val; 202 203 val = ctob(physmem - vm_wire_count()); 204 return (sysctl_handle_long(oidp, &val, 0, req)); 205 } 206 207 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 208 0, 0, sysctl_hw_usermem, "LU", ""); 209 210 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 211 212 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 213 214 static int 215 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 216 { 217 int error; 218 #ifdef SCTL_MASK32 219 int i; 220 uint32_t pagesizes32[MAXPAGESIZES]; 221 222 if (req->flags & SCTL_MASK32) { 223 /* 224 * Recreate the "pagesizes" array with 32-bit elements. Truncate 225 * any page size greater than UINT32_MAX to zero. 226 */ 227 for (i = 0; i < MAXPAGESIZES; i++) 228 pagesizes32[i] = (uint32_t)pagesizes[i]; 229 230 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 231 } else 232 #endif 233 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 234 return (error); 235 } 236 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 237 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 238 239 #ifdef SCTL_MASK32 240 int adaptive_machine_arch = 1; 241 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 242 &adaptive_machine_arch, 1, 243 "Adapt reported machine architecture to the ABI of the binary"); 244 #endif 245 246 static int 247 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 248 { 249 int error; 250 static const char machine_arch[] = MACHINE_ARCH; 251 #ifdef SCTL_MASK32 252 static const char machine_arch32[] = MACHINE_ARCH32; 253 254 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 255 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 256 else 257 #endif 258 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 259 return (error); 260 261 } 262 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 263 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 264 "System architecture"); 265 266 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 267 #ifdef COMPAT_FREEBSD32 268 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 269 #else 270 MACHINE_ARCH, 0, "Supported architectures for binaries"); 271 #endif 272 273 static int 274 sysctl_hostname(SYSCTL_HANDLER_ARGS) 275 { 276 struct prison *pr, *cpr; 277 size_t pr_offset; 278 char tmpname[MAXHOSTNAMELEN]; 279 int descend, error, len; 280 281 /* 282 * This function can set: hostname domainname hostuuid. 283 * Keep that in mind when comments say "hostname". 284 */ 285 pr_offset = (size_t)arg1; 286 len = arg2; 287 KASSERT(len <= sizeof(tmpname), 288 ("length %d too long for %s", len, __func__)); 289 290 pr = req->td->td_ucred->cr_prison; 291 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 292 return (EPERM); 293 /* 294 * Make a local copy of hostname to get/set so we don't have to hold 295 * the jail mutex during the sysctl copyin/copyout activities. 296 */ 297 mtx_lock(&pr->pr_mtx); 298 bcopy((char *)pr + pr_offset, tmpname, len); 299 mtx_unlock(&pr->pr_mtx); 300 301 error = sysctl_handle_string(oidp, tmpname, len, req); 302 303 if (req->newptr != NULL && error == 0) { 304 /* 305 * Copy the locally set hostname to all jails that share 306 * this host info. 307 */ 308 sx_slock(&allprison_lock); 309 while (!(pr->pr_flags & PR_HOST)) 310 pr = pr->pr_parent; 311 mtx_lock(&pr->pr_mtx); 312 bcopy(tmpname, (char *)pr + pr_offset, len); 313 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 314 if (cpr->pr_flags & PR_HOST) 315 descend = 0; 316 else 317 bcopy(tmpname, (char *)cpr + pr_offset, len); 318 mtx_unlock(&pr->pr_mtx); 319 sx_sunlock(&allprison_lock); 320 } 321 return (error); 322 } 323 324 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 325 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 326 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 327 sysctl_hostname, "A", "Hostname"); 328 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 329 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 330 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 331 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 332 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 333 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 334 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 335 sysctl_hostname, "A", "Host UUID"); 336 337 static int regression_securelevel_nonmonotonic = 0; 338 339 #ifdef REGRESSION 340 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 341 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 342 #endif 343 344 static int 345 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 346 { 347 struct prison *pr, *cpr; 348 int descend, error, level; 349 350 pr = req->td->td_ucred->cr_prison; 351 352 /* 353 * Reading the securelevel is easy, since the current jail's level 354 * is known to be at least as secure as any higher levels. Perform 355 * a lockless read since the securelevel is an integer. 356 */ 357 level = pr->pr_securelevel; 358 error = sysctl_handle_int(oidp, &level, 0, req); 359 if (error || !req->newptr) 360 return (error); 361 /* Permit update only if the new securelevel exceeds the old. */ 362 sx_slock(&allprison_lock); 363 mtx_lock(&pr->pr_mtx); 364 if (!regression_securelevel_nonmonotonic && 365 level < pr->pr_securelevel) { 366 mtx_unlock(&pr->pr_mtx); 367 sx_sunlock(&allprison_lock); 368 return (EPERM); 369 } 370 pr->pr_securelevel = level; 371 /* 372 * Set all child jails to be at least this level, but do not lower 373 * them (even if regression_securelevel_nonmonotonic). 374 */ 375 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 376 if (cpr->pr_securelevel < level) 377 cpr->pr_securelevel = level; 378 } 379 mtx_unlock(&pr->pr_mtx); 380 sx_sunlock(&allprison_lock); 381 return (error); 382 } 383 384 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 385 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 386 "I", "Current secure level"); 387 388 #ifdef INCLUDE_CONFIG_FILE 389 /* Actual kernel configuration options. */ 390 extern char kernconfstring[]; 391 392 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 393 kernconfstring, 0, "Kernel configuration file"); 394 #endif 395 396 static int 397 sysctl_hostid(SYSCTL_HANDLER_ARGS) 398 { 399 struct prison *pr, *cpr; 400 u_long tmpid; 401 int descend, error; 402 403 /* 404 * Like sysctl_hostname, except it operates on a u_long 405 * instead of a string, and is used only for hostid. 406 */ 407 pr = req->td->td_ucred->cr_prison; 408 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 409 return (EPERM); 410 tmpid = pr->pr_hostid; 411 error = sysctl_handle_long(oidp, &tmpid, 0, req); 412 413 if (req->newptr != NULL && error == 0) { 414 sx_slock(&allprison_lock); 415 while (!(pr->pr_flags & PR_HOST)) 416 pr = pr->pr_parent; 417 mtx_lock(&pr->pr_mtx); 418 pr->pr_hostid = tmpid; 419 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 420 if (cpr->pr_flags & PR_HOST) 421 descend = 0; 422 else 423 cpr->pr_hostid = tmpid; 424 mtx_unlock(&pr->pr_mtx); 425 sx_sunlock(&allprison_lock); 426 } 427 return (error); 428 } 429 430 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 431 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 432 NULL, 0, sysctl_hostid, "LU", "Host ID"); 433 434 /* 435 * The osrelease string is copied from the global (osrelease in vers.c) into 436 * prison0 by a sysinit and is inherited by child jails if not changed at jail 437 * creation, so we always return the copy from the current prison data. 438 */ 439 static int 440 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 441 { 442 struct prison *pr; 443 444 pr = req->td->td_ucred->cr_prison; 445 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 446 447 } 448 449 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 450 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 451 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 452 453 /* 454 * The osreldate number is copied from the global (osreldate in vers.c) into 455 * prison0 by a sysinit and is inherited by child jails if not changed at jail 456 * creation, so we always return the value from the current prison data. 457 */ 458 static int 459 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 460 { 461 struct prison *pr; 462 463 pr = req->td->td_ucred->cr_prison; 464 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 465 466 } 467 468 /* 469 * NOTICE: The *userland* release date is available in 470 * /usr/include/osreldate.h 471 */ 472 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 473 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 474 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 475 476 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 477 478 #ifdef COMPAT_FREEBSD4 479 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 480 #endif 481 482 #ifdef COMPAT_FREEBSD5 483 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 484 #endif 485 486 #ifdef COMPAT_FREEBSD6 487 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 488 #endif 489 490 #ifdef COMPAT_FREEBSD7 491 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 492 #endif 493 494 /* 495 * This is really cheating. These actually live in the libc, something 496 * which I'm not quite sure is a good idea anyway, but in order for 497 * getnext and friends to actually work, we define dummies here. 498 * 499 * XXXRW: These probably should be CTLFLAG_CAPRD. 500 */ 501 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 502 "", 0, "PATH that finds all the standard utilities"); 503 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 504 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 505 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 506 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 507 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 508 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 509 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 510 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 511 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 512 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 513 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 514 SYSCTL_NULL_INT_PTR, 0, ""); 515 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 516 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 517 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 518 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 519 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 520 SYSCTL_NULL_INT_PTR, 0, 521 "The version of POSIX 1003.2 with which the system attempts to comply"); 522 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 524 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 526 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, ""); 528 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 530 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 532 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 534 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 536 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 537 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 538 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 539 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 540 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 541 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 542 543 #include <sys/vnode.h> 544 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 545 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 546 547 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 548 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 549 550 static int 551 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 552 { 553 int error, pm; 554 555 pm = pid_max; 556 error = sysctl_handle_int(oidp, &pm, 0, req); 557 if (error || !req->newptr) 558 return (error); 559 sx_xlock(&proctree_lock); 560 sx_xlock(&allproc_lock); 561 562 /* 563 * Only permit the values less then PID_MAX. 564 * As a safety measure, do not allow to limit the pid_max too much. 565 */ 566 if (pm < 300 || pm > PID_MAX) 567 error = EINVAL; 568 else 569 pid_max = pm; 570 sx_xunlock(&allproc_lock); 571 sx_xunlock(&proctree_lock); 572 return (error); 573 } 574 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 575 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 576 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 577 578 #include <sys/bio.h> 579 #include <sys/buf.h> 580 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 581 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 582 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 583 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 584 585 #include <sys/user.h> 586 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 587 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 588 589 /* Used by kernel debuggers. */ 590 const int pcb_size = sizeof(struct pcb); 591 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 592 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 593 594 /* XXX compatibility, remove for 6.0 */ 595 #include <sys/imgact.h> 596 #include <sys/imgact_elf.h> 597 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 598 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 599 "compatibility for kern.fallback_elf_brand");
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