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("$FreeBSD$"); 42 43 #include "opt_compat.h" 44 #include "opt_posix.h" 45 #include "opt_config.h" 46 47 #include <sys/param.h> 48 #include <sys/jail.h> 49 #include <sys/kernel.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/proc.h> 53 #include <sys/random.h> 54 #include <sys/sbuf.h> 55 #include <sys/smp.h> 56 #include <sys/sx.h> 57 #include <sys/vmmeter.h> 58 #include <sys/sysctl.h> 59 #include <sys/systm.h> 60 #include <sys/unistd.h> 61 62 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 63 "Sysctl internal magic"); 64 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 65 "High kernel, proc, limits &c"); 66 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 67 "Virtual memory"); 68 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 69 "File system"); 70 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 71 "Network, (see socket.h)"); 72 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 73 "Debugging"); 74 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 75 "Sizeof various things"); 76 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 77 "hardware"); 78 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 79 "machine dependent"); 80 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 81 "user-level"); 82 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 83 "p1003_1b, (see p1003_1b.h)"); 84 85 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 86 "Compatibility code"); 87 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 88 "Security"); 89 #ifdef REGRESSION 90 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 91 "Regression test MIB"); 92 #endif 93 94 #ifdef EXT_RESOURCES 95 SYSCTL_ROOT_NODE(OID_AUTO, clock, CTLFLAG_RW, 0, 96 "Clocks"); 97 #endif 98 99 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 100 kern_ident, 0, "Kernel identifier"); 101 102 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 103 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 104 105 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 106 version, 0, "Kernel version"); 107 108 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 109 compiler_version, 0, "Version of compiler used to compile kernel"); 110 111 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 112 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 113 114 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 115 &maxproc, 0, "Maximum number of processes"); 116 117 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 118 &maxprocperuid, 0, "Maximum processes allowed per userid"); 119 120 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 121 &maxusers, 0, "Hint for kernel tuning"); 122 123 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 124 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 125 126 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 127 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 128 129 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"); 132 133 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 134 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 135 136 #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"); 139 #else 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"); 142 #endif 143 144 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 145 146 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 147 kernelname, sizeof kernelname, "Name of kernel file booted"); 148 149 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, 150 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); 151 152 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 153 &mp_ncpus, 0, "Number of active CPUs"); 154 155 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 156 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 157 158 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 159 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 160 161 static int 162 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 163 { 164 char buf[256]; 165 size_t len; 166 167 /*- 168 * This is one of the very few legitimate uses of read_random(9). 169 * Use of arc4random(9) is not recommended as that will ignore 170 * an unsafe (i.e. unseeded) random(4). 171 * 172 * If random(4) is not seeded, then this returns 0, so the 173 * sysctl will return a zero-length buffer. 174 */ 175 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 176 return (SYSCTL_OUT(req, buf, len)); 177 } 178 179 SYSCTL_PROC(_kern, KERN_ARND, arandom, 180 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 181 sysctl_kern_arnd, "", "arc4rand"); 182 183 static int 184 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 185 { 186 u_long val; 187 188 val = ctob(physmem); 189 return (sysctl_handle_long(oidp, &val, 0, req)); 190 } 191 192 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 193 0, 0, sysctl_hw_physmem, "LU", ""); 194 195 static int 196 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 197 { 198 u_long val; 199 val = ctob(realmem); 200 return (sysctl_handle_long(oidp, &val, 0, req)); 201 } 202 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 203 0, 0, sysctl_hw_realmem, "LU", ""); 204 static int 205 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 206 { 207 u_long val; 208 209 val = ctob(physmem - vm_cnt.v_wire_count); 210 return (sysctl_handle_long(oidp, &val, 0, req)); 211 } 212 213 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 214 0, 0, sysctl_hw_usermem, "LU", ""); 215 216 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 217 218 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 219 220 static int 221 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 222 { 223 int error; 224 #ifdef SCTL_MASK32 225 int i; 226 uint32_t pagesizes32[MAXPAGESIZES]; 227 228 if (req->flags & SCTL_MASK32) { 229 /* 230 * Recreate the "pagesizes" array with 32-bit elements. Truncate 231 * any page size greater than UINT32_MAX to zero. 232 */ 233 for (i = 0; i < MAXPAGESIZES; i++) 234 pagesizes32[i] = (uint32_t)pagesizes[i]; 235 236 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 237 } else 238 #endif 239 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 240 return (error); 241 } 242 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 243 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 244 245 #ifdef SCTL_MASK32 246 int adaptive_machine_arch = 1; 247 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 248 &adaptive_machine_arch, 1, 249 "Adapt reported machine architecture to the ABI of the binary"); 250 #endif 251 252 static int 253 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 254 { 255 int error; 256 static const char machine_arch[] = MACHINE_ARCH; 257 #ifdef SCTL_MASK32 258 static const char machine_arch32[] = MACHINE_ARCH32; 259 260 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 261 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 262 else 263 #endif 264 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 265 return (error); 266 267 } 268 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 269 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 270 "System architecture"); 271 272 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 273 #ifdef COMPAT_FREEBSD32 274 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 275 #else 276 MACHINE_ARCH, 0, "Supported architectures for binaries"); 277 #endif 278 279 static int 280 sysctl_hostname(SYSCTL_HANDLER_ARGS) 281 { 282 struct prison *pr, *cpr; 283 size_t pr_offset; 284 char tmpname[MAXHOSTNAMELEN]; 285 int descend, error, len; 286 287 /* 288 * This function can set: hostname domainname hostuuid. 289 * Keep that in mind when comments say "hostname". 290 */ 291 pr_offset = (size_t)arg1; 292 len = arg2; 293 KASSERT(len <= sizeof(tmpname), 294 ("length %d too long for %s", len, __func__)); 295 296 pr = req->td->td_ucred->cr_prison; 297 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 298 return (EPERM); 299 /* 300 * Make a local copy of hostname to get/set so we don't have to hold 301 * the jail mutex during the sysctl copyin/copyout activities. 302 */ 303 mtx_lock(&pr->pr_mtx); 304 bcopy((char *)pr + pr_offset, tmpname, len); 305 mtx_unlock(&pr->pr_mtx); 306 307 error = sysctl_handle_string(oidp, tmpname, len, req); 308 309 if (req->newptr != NULL && error == 0) { 310 /* 311 * Copy the locally set hostname to all jails that share 312 * this host info. 313 */ 314 sx_slock(&allprison_lock); 315 while (!(pr->pr_flags & PR_HOST)) 316 pr = pr->pr_parent; 317 mtx_lock(&pr->pr_mtx); 318 bcopy(tmpname, (char *)pr + pr_offset, len); 319 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 320 if (cpr->pr_flags & PR_HOST) 321 descend = 0; 322 else 323 bcopy(tmpname, (char *)cpr + pr_offset, len); 324 mtx_unlock(&pr->pr_mtx); 325 sx_sunlock(&allprison_lock); 326 } 327 return (error); 328 } 329 330 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 331 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 332 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 333 sysctl_hostname, "A", "Hostname"); 334 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 335 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 336 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 337 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 338 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 339 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 340 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 341 sysctl_hostname, "A", "Host UUID"); 342 343 static int regression_securelevel_nonmonotonic = 0; 344 345 #ifdef REGRESSION 346 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 347 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 348 #endif 349 350 static int 351 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 352 { 353 struct prison *pr, *cpr; 354 int descend, error, level; 355 356 pr = req->td->td_ucred->cr_prison; 357 358 /* 359 * Reading the securelevel is easy, since the current jail's level 360 * is known to be at least as secure as any higher levels. Perform 361 * a lockless read since the securelevel is an integer. 362 */ 363 level = pr->pr_securelevel; 364 error = sysctl_handle_int(oidp, &level, 0, req); 365 if (error || !req->newptr) 366 return (error); 367 /* Permit update only if the new securelevel exceeds the old. */ 368 sx_slock(&allprison_lock); 369 mtx_lock(&pr->pr_mtx); 370 if (!regression_securelevel_nonmonotonic && 371 level < pr->pr_securelevel) { 372 mtx_unlock(&pr->pr_mtx); 373 sx_sunlock(&allprison_lock); 374 return (EPERM); 375 } 376 pr->pr_securelevel = level; 377 /* 378 * Set all child jails to be at least this level, but do not lower 379 * them (even if regression_securelevel_nonmonotonic). 380 */ 381 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 382 if (cpr->pr_securelevel < level) 383 cpr->pr_securelevel = level; 384 } 385 mtx_unlock(&pr->pr_mtx); 386 sx_sunlock(&allprison_lock); 387 return (error); 388 } 389 390 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 391 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 392 "I", "Current secure level"); 393 394 #ifdef INCLUDE_CONFIG_FILE 395 /* Actual kernel configuration options. */ 396 extern char kernconfstring[]; 397 398 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 399 kernconfstring, 0, "Kernel configuration file"); 400 #endif 401 402 static int 403 sysctl_hostid(SYSCTL_HANDLER_ARGS) 404 { 405 struct prison *pr, *cpr; 406 u_long tmpid; 407 int descend, error; 408 409 /* 410 * Like sysctl_hostname, except it operates on a u_long 411 * instead of a string, and is used only for hostid. 412 */ 413 pr = req->td->td_ucred->cr_prison; 414 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 415 return (EPERM); 416 tmpid = pr->pr_hostid; 417 error = sysctl_handle_long(oidp, &tmpid, 0, req); 418 419 if (req->newptr != NULL && error == 0) { 420 sx_slock(&allprison_lock); 421 while (!(pr->pr_flags & PR_HOST)) 422 pr = pr->pr_parent; 423 mtx_lock(&pr->pr_mtx); 424 pr->pr_hostid = tmpid; 425 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 426 if (cpr->pr_flags & PR_HOST) 427 descend = 0; 428 else 429 cpr->pr_hostid = tmpid; 430 mtx_unlock(&pr->pr_mtx); 431 sx_sunlock(&allprison_lock); 432 } 433 return (error); 434 } 435 436 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 437 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 438 NULL, 0, sysctl_hostid, "LU", "Host ID"); 439 440 /* 441 * The osrelease string is copied from the global (osrelease in vers.c) into 442 * prison0 by a sysinit and is inherited by child jails if not changed at jail 443 * creation, so we always return the copy from the current prison data. 444 */ 445 static int 446 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 447 { 448 struct prison *pr; 449 450 pr = req->td->td_ucred->cr_prison; 451 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 452 453 } 454 455 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 456 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 457 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 458 459 /* 460 * The osreldate number is copied from the global (osreldate in vers.c) into 461 * prison0 by a sysinit and is inherited by child jails if not changed at jail 462 * creation, so we always return the value from the current prison data. 463 */ 464 static int 465 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 466 { 467 struct prison *pr; 468 469 pr = req->td->td_ucred->cr_prison; 470 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 471 472 } 473 474 /* 475 * NOTICE: The *userland* release date is available in 476 * /usr/include/osreldate.h 477 */ 478 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 479 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 480 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 481 482 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 483 484 #ifdef COMPAT_FREEBSD4 485 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 486 #endif 487 488 #ifdef COMPAT_FREEBSD5 489 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 490 #endif 491 492 #ifdef COMPAT_FREEBSD6 493 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 494 #endif 495 496 #ifdef COMPAT_FREEBSD7 497 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 498 #endif 499 500 /* 501 * This is really cheating. These actually live in the libc, something 502 * which I'm not quite sure is a good idea anyway, but in order for 503 * getnext and friends to actually work, we define dummies here. 504 * 505 * XXXRW: These probably should be CTLFLAG_CAPRD. 506 */ 507 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 508 "", 0, "PATH that finds all the standard utilities"); 509 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 510 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 511 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 512 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 513 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 514 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 515 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 516 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 517 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 518 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 519 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 520 SYSCTL_NULL_INT_PTR, 0, ""); 521 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 522 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 523 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 524 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 525 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 526 SYSCTL_NULL_INT_PTR, 0, 527 "The version of POSIX 1003.2 with which the system attempts to comply"); 528 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 530 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 532 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, ""); 534 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 536 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 537 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 538 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 539 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 540 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 541 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 542 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 543 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 544 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 545 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 546 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 547 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 548 549 #include <sys/vnode.h> 550 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 551 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 552 553 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 554 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 555 556 static int 557 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 558 { 559 int error, pm; 560 561 pm = pid_max; 562 error = sysctl_handle_int(oidp, &pm, 0, req); 563 if (error || !req->newptr) 564 return (error); 565 sx_xlock(&proctree_lock); 566 sx_xlock(&allproc_lock); 567 568 /* 569 * Only permit the values less then PID_MAX. 570 * As a safety measure, do not allow to limit the pid_max too much. 571 */ 572 if (pm < 300 || pm > PID_MAX) 573 error = EINVAL; 574 else 575 pid_max = pm; 576 sx_xunlock(&allproc_lock); 577 sx_xunlock(&proctree_lock); 578 return (error); 579 } 580 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 581 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 582 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 583 584 #include <sys/bio.h> 585 #include <sys/buf.h> 586 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 587 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 588 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 589 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 590 591 #include <sys/user.h> 592 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 593 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 594 595 /* Used by kernel debuggers. */ 596 const int pcb_size = sizeof(struct pcb); 597 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 598 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 599 600 /* XXX compatibility, remove for 6.0 */ 601 #include <sys/imgact.h> 602 #include <sys/imgact_elf.h> 603 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 604 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 605 "compatibility for kern.fallback_elf_brand"); 606