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 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Mike Karels at Berkeley Software Design, Inc. 7 * 8 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 9 * project, to make these variables more userfriendly. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD: releng/11.1/sys/kern/kern_mib.c 310970 2016-12-31 13:05:48Z mjg $"); 40 41 #include "opt_compat.h" 42 #include "opt_posix.h" 43 #include "opt_config.h" 44 45 #include <sys/param.h> 46 #include <sys/jail.h> 47 #include <sys/kernel.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/proc.h> 51 #include <sys/random.h> 52 #include <sys/sbuf.h> 53 #include <sys/smp.h> 54 #include <sys/sx.h> 55 #include <sys/sysctl.h> 56 #include <sys/systm.h> 57 #include <sys/unistd.h> 58 59 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 60 "Sysctl internal magic"); 61 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 62 "High kernel, proc, limits &c"); 63 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 64 "Virtual memory"); 65 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 66 "File system"); 67 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 68 "Network, (see socket.h)"); 69 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 70 "Debugging"); 71 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 72 "Sizeof various things"); 73 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 74 "hardware"); 75 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 76 "machine dependent"); 77 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 78 "user-level"); 79 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 80 "p1003_1b, (see p1003_1b.h)"); 81 82 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 83 "Compatibility code"); 84 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 85 "Security"); 86 #ifdef REGRESSION 87 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 88 "Regression test MIB"); 89 #endif 90 91 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 92 kern_ident, 0, "Kernel identifier"); 93 94 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 95 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 96 97 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 98 version, 0, "Kernel version"); 99 100 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 101 compiler_version, 0, "Version of compiler used to compile kernel"); 102 103 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 104 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 105 106 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 107 &maxproc, 0, "Maximum number of processes"); 108 109 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 110 &maxprocperuid, 0, "Maximum processes allowed per userid"); 111 112 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 113 &maxusers, 0, "Hint for kernel tuning"); 114 115 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 116 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 117 118 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 119 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 120 121 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 122 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 123 "Maximum number of supplemental groups a user can belong to"); 124 125 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 126 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 127 128 #ifdef _POSIX_SAVED_IDS 129 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 130 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 131 #else 132 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 133 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 134 #endif 135 136 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 137 138 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 139 kernelname, sizeof kernelname, "Name of kernel file booted"); 140 141 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 142 &mp_ncpus, 0, "Number of active CPUs"); 143 144 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 145 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 146 147 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 148 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 149 150 static int 151 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 152 { 153 char buf[256]; 154 size_t len; 155 156 /*- 157 * This is one of the very few legitimate uses of read_random(9). 158 * Use of arc4random(9) is not recommended as that will ignore 159 * an unsafe (i.e. unseeded) random(4). 160 * 161 * If random(4) is not seeded, then this returns 0, so the 162 * sysctl will return a zero-length buffer. 163 */ 164 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 165 return (SYSCTL_OUT(req, buf, len)); 166 } 167 168 SYSCTL_PROC(_kern, KERN_ARND, arandom, 169 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 170 sysctl_kern_arnd, "", "arc4rand"); 171 172 static int 173 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 174 { 175 u_long val; 176 177 val = ctob(physmem); 178 return (sysctl_handle_long(oidp, &val, 0, req)); 179 } 180 181 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 182 0, 0, sysctl_hw_physmem, "LU", ""); 183 184 static int 185 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 186 { 187 u_long val; 188 val = ctob(realmem); 189 return (sysctl_handle_long(oidp, &val, 0, req)); 190 } 191 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 192 0, 0, sysctl_hw_realmem, "LU", ""); 193 static int 194 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 195 { 196 u_long val; 197 198 val = ctob(physmem - vm_cnt.v_wire_count); 199 return (sysctl_handle_long(oidp, &val, 0, req)); 200 } 201 202 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 203 0, 0, sysctl_hw_usermem, "LU", ""); 204 205 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 206 207 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 208 209 static int 210 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 211 { 212 int error; 213 #ifdef SCTL_MASK32 214 int i; 215 uint32_t pagesizes32[MAXPAGESIZES]; 216 217 if (req->flags & SCTL_MASK32) { 218 /* 219 * Recreate the "pagesizes" array with 32-bit elements. Truncate 220 * any page size greater than UINT32_MAX to zero. 221 */ 222 for (i = 0; i < MAXPAGESIZES; i++) 223 pagesizes32[i] = (uint32_t)pagesizes[i]; 224 225 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 226 } else 227 #endif 228 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 229 return (error); 230 } 231 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 232 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 233 234 #ifdef SCTL_MASK32 235 int adaptive_machine_arch = 1; 236 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 237 &adaptive_machine_arch, 1, 238 "Adapt reported machine architecture to the ABI of the binary"); 239 #endif 240 241 static int 242 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 243 { 244 int error; 245 static const char machine_arch[] = MACHINE_ARCH; 246 #ifdef SCTL_MASK32 247 static const char machine_arch32[] = MACHINE_ARCH32; 248 249 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 250 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 251 else 252 #endif 253 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 254 return (error); 255 256 } 257 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 258 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 259 "System architecture"); 260 261 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 262 #ifdef COMPAT_FREEBSD32 263 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 264 #else 265 MACHINE_ARCH, 0, "Supported architectures for binaries"); 266 #endif 267 268 static int 269 sysctl_hostname(SYSCTL_HANDLER_ARGS) 270 { 271 struct prison *pr, *cpr; 272 size_t pr_offset; 273 char tmpname[MAXHOSTNAMELEN]; 274 int descend, error, len; 275 276 /* 277 * This function can set: hostname domainname hostuuid. 278 * Keep that in mind when comments say "hostname". 279 */ 280 pr_offset = (size_t)arg1; 281 len = arg2; 282 KASSERT(len <= sizeof(tmpname), 283 ("length %d too long for %s", len, __func__)); 284 285 pr = req->td->td_ucred->cr_prison; 286 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 287 return (EPERM); 288 /* 289 * Make a local copy of hostname to get/set so we don't have to hold 290 * the jail mutex during the sysctl copyin/copyout activities. 291 */ 292 mtx_lock(&pr->pr_mtx); 293 bcopy((char *)pr + pr_offset, tmpname, len); 294 mtx_unlock(&pr->pr_mtx); 295 296 error = sysctl_handle_string(oidp, tmpname, len, req); 297 298 if (req->newptr != NULL && error == 0) { 299 /* 300 * Copy the locally set hostname to all jails that share 301 * this host info. 302 */ 303 sx_slock(&allprison_lock); 304 while (!(pr->pr_flags & PR_HOST)) 305 pr = pr->pr_parent; 306 mtx_lock(&pr->pr_mtx); 307 bcopy(tmpname, (char *)pr + pr_offset, len); 308 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 309 if (cpr->pr_flags & PR_HOST) 310 descend = 0; 311 else 312 bcopy(tmpname, (char *)cpr + pr_offset, len); 313 mtx_unlock(&pr->pr_mtx); 314 sx_sunlock(&allprison_lock); 315 } 316 return (error); 317 } 318 319 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 320 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 321 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 322 sysctl_hostname, "A", "Hostname"); 323 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 324 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 325 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 326 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 327 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 328 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 329 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 330 sysctl_hostname, "A", "Host UUID"); 331 332 static int regression_securelevel_nonmonotonic = 0; 333 334 #ifdef REGRESSION 335 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 336 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 337 #endif 338 339 static int 340 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 341 { 342 struct prison *pr, *cpr; 343 int descend, error, level; 344 345 pr = req->td->td_ucred->cr_prison; 346 347 /* 348 * Reading the securelevel is easy, since the current jail's level 349 * is known to be at least as secure as any higher levels. Perform 350 * a lockless read since the securelevel is an integer. 351 */ 352 level = pr->pr_securelevel; 353 error = sysctl_handle_int(oidp, &level, 0, req); 354 if (error || !req->newptr) 355 return (error); 356 /* Permit update only if the new securelevel exceeds the old. */ 357 sx_slock(&allprison_lock); 358 mtx_lock(&pr->pr_mtx); 359 if (!regression_securelevel_nonmonotonic && 360 level < pr->pr_securelevel) { 361 mtx_unlock(&pr->pr_mtx); 362 sx_sunlock(&allprison_lock); 363 return (EPERM); 364 } 365 pr->pr_securelevel = level; 366 /* 367 * Set all child jails to be at least this level, but do not lower 368 * them (even if regression_securelevel_nonmonotonic). 369 */ 370 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 371 if (cpr->pr_securelevel < level) 372 cpr->pr_securelevel = level; 373 } 374 mtx_unlock(&pr->pr_mtx); 375 sx_sunlock(&allprison_lock); 376 return (error); 377 } 378 379 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 380 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 381 "I", "Current secure level"); 382 383 #ifdef INCLUDE_CONFIG_FILE 384 /* Actual kernel configuration options. */ 385 extern char kernconfstring[]; 386 387 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 388 kernconfstring, 0, "Kernel configuration file"); 389 #endif 390 391 static int 392 sysctl_hostid(SYSCTL_HANDLER_ARGS) 393 { 394 struct prison *pr, *cpr; 395 u_long tmpid; 396 int descend, error; 397 398 /* 399 * Like sysctl_hostname, except it operates on a u_long 400 * instead of a string, and is used only for hostid. 401 */ 402 pr = req->td->td_ucred->cr_prison; 403 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 404 return (EPERM); 405 tmpid = pr->pr_hostid; 406 error = sysctl_handle_long(oidp, &tmpid, 0, req); 407 408 if (req->newptr != NULL && error == 0) { 409 sx_slock(&allprison_lock); 410 while (!(pr->pr_flags & PR_HOST)) 411 pr = pr->pr_parent; 412 mtx_lock(&pr->pr_mtx); 413 pr->pr_hostid = tmpid; 414 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 415 if (cpr->pr_flags & PR_HOST) 416 descend = 0; 417 else 418 cpr->pr_hostid = tmpid; 419 mtx_unlock(&pr->pr_mtx); 420 sx_sunlock(&allprison_lock); 421 } 422 return (error); 423 } 424 425 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 426 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 427 NULL, 0, sysctl_hostid, "LU", "Host ID"); 428 429 /* 430 * The osrelease string is copied from the global (osrelease in vers.c) into 431 * prison0 by a sysinit and is inherited by child jails if not changed at jail 432 * creation, so we always return the copy from the current prison data. 433 */ 434 static int 435 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 436 { 437 struct prison *pr; 438 439 pr = req->td->td_ucred->cr_prison; 440 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 441 442 } 443 444 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 445 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 446 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 447 448 /* 449 * The osreldate number is copied from the global (osreldate in vers.c) into 450 * prison0 by a sysinit and is inherited by child jails if not changed at jail 451 * creation, so we always return the value from the current prison data. 452 */ 453 static int 454 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 455 { 456 struct prison *pr; 457 458 pr = req->td->td_ucred->cr_prison; 459 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 460 461 } 462 463 /* 464 * NOTICE: The *userland* release date is available in 465 * /usr/include/osreldate.h 466 */ 467 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 468 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 469 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 470 471 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 472 473 #ifdef COMPAT_FREEBSD4 474 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 475 #endif 476 477 #ifdef COMPAT_FREEBSD5 478 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 479 #endif 480 481 #ifdef COMPAT_FREEBSD6 482 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 483 #endif 484 485 #ifdef COMPAT_FREEBSD7 486 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 487 #endif 488 489 /* 490 * This is really cheating. These actually live in the libc, something 491 * which I'm not quite sure is a good idea anyway, but in order for 492 * getnext and friends to actually work, we define dummies here. 493 * 494 * XXXRW: These probably should be CTLFLAG_CAPRD. 495 */ 496 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 497 "", 0, "PATH that finds all the standard utilities"); 498 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 499 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 500 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 501 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 502 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 503 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 504 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 505 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 506 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 507 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 508 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 509 SYSCTL_NULL_INT_PTR, 0, ""); 510 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 511 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 512 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 513 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 514 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 515 SYSCTL_NULL_INT_PTR, 0, 516 "The version of POSIX 1003.2 with which the system attempts to comply"); 517 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 518 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 519 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 520 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 521 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 522 SYSCTL_NULL_INT_PTR, 0, ""); 523 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 524 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 525 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 526 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 527 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 528 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 529 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 530 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 531 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 532 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 533 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 534 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 535 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 536 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 537 538 #include <sys/vnode.h> 539 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 540 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 541 542 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 543 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 544 545 static int 546 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 547 { 548 int error, pm; 549 550 pm = pid_max; 551 error = sysctl_handle_int(oidp, &pm, 0, req); 552 if (error || !req->newptr) 553 return (error); 554 sx_xlock(&proctree_lock); 555 sx_xlock(&allproc_lock); 556 557 /* 558 * Only permit the values less then PID_MAX. 559 * As a safety measure, do not allow to limit the pid_max too much. 560 */ 561 if (pm < 300 || pm > PID_MAX) 562 error = EINVAL; 563 else 564 pid_max = pm; 565 sx_xunlock(&allproc_lock); 566 sx_xunlock(&proctree_lock); 567 return (error); 568 } 569 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 570 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 571 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 572 573 #include <sys/bio.h> 574 #include <sys/buf.h> 575 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 576 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 577 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 578 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 579 580 #include <sys/user.h> 581 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 582 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 583 584 /* Used by kernel debuggers. */ 585 const int pcb_size = sizeof(struct pcb); 586 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 587 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 588 589 /* XXX compatibility, remove for 6.0 */ 590 #include <sys/imgact.h> 591 #include <sys/imgact_elf.h> 592 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 593 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 594 "compatibility for kern.fallback_elf_brand");
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