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/11.2/sys/kern/kern_mib.c 331722 2018-03-29 02:50:57Z eadler $"); 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/vmmeter.h> 56 #include <sys/sysctl.h> 57 #include <sys/systm.h> 58 #include <sys/unistd.h> 59 60 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 61 "Sysctl internal magic"); 62 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 63 "High kernel, proc, limits &c"); 64 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 65 "Virtual memory"); 66 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 67 "File system"); 68 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 69 "Network, (see socket.h)"); 70 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 71 "Debugging"); 72 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 73 "Sizeof various things"); 74 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 75 "hardware"); 76 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 77 "machine dependent"); 78 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 79 "user-level"); 80 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 81 "p1003_1b, (see p1003_1b.h)"); 82 83 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 84 "Compatibility code"); 85 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 86 "Security"); 87 #ifdef REGRESSION 88 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 89 "Regression test MIB"); 90 #endif 91 92 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 93 kern_ident, 0, "Kernel identifier"); 94 95 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 96 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 97 98 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 99 version, 0, "Kernel version"); 100 101 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 102 compiler_version, 0, "Version of compiler used to compile kernel"); 103 104 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 105 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 106 107 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 108 &maxproc, 0, "Maximum number of processes"); 109 110 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 111 &maxprocperuid, 0, "Maximum processes allowed per userid"); 112 113 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 114 &maxusers, 0, "Hint for kernel tuning"); 115 116 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 117 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 118 119 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 120 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 121 122 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 123 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 124 "Maximum number of supplemental groups a user can belong to"); 125 126 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 127 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 128 129 #ifdef _POSIX_SAVED_IDS 130 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 131 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 132 #else 133 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 134 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 135 #endif 136 137 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 138 139 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 140 kernelname, sizeof kernelname, "Name of kernel file booted"); 141 142 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 143 &mp_ncpus, 0, "Number of active CPUs"); 144 145 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 146 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 147 148 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 149 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 150 151 static int 152 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 153 { 154 char buf[256]; 155 size_t len; 156 157 /*- 158 * This is one of the very few legitimate uses of read_random(9). 159 * Use of arc4random(9) is not recommended as that will ignore 160 * an unsafe (i.e. unseeded) random(4). 161 * 162 * If random(4) is not seeded, then this returns 0, so the 163 * sysctl will return a zero-length buffer. 164 */ 165 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 166 return (SYSCTL_OUT(req, buf, len)); 167 } 168 169 SYSCTL_PROC(_kern, KERN_ARND, arandom, 170 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 171 sysctl_kern_arnd, "", "arc4rand"); 172 173 static int 174 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 175 { 176 u_long val; 177 178 val = ctob(physmem); 179 return (sysctl_handle_long(oidp, &val, 0, req)); 180 } 181 182 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 183 0, 0, sysctl_hw_physmem, "LU", ""); 184 185 static int 186 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 187 { 188 u_long val; 189 val = ctob(realmem); 190 return (sysctl_handle_long(oidp, &val, 0, req)); 191 } 192 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 193 0, 0, sysctl_hw_realmem, "LU", ""); 194 static int 195 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 196 { 197 u_long val; 198 199 val = ctob(physmem - vm_cnt.v_wire_count); 200 return (sysctl_handle_long(oidp, &val, 0, req)); 201 } 202 203 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 204 0, 0, sysctl_hw_usermem, "LU", ""); 205 206 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 207 208 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 209 210 static int 211 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 212 { 213 int error; 214 #ifdef SCTL_MASK32 215 int i; 216 uint32_t pagesizes32[MAXPAGESIZES]; 217 218 if (req->flags & SCTL_MASK32) { 219 /* 220 * Recreate the "pagesizes" array with 32-bit elements. Truncate 221 * any page size greater than UINT32_MAX to zero. 222 */ 223 for (i = 0; i < MAXPAGESIZES; i++) 224 pagesizes32[i] = (uint32_t)pagesizes[i]; 225 226 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 227 } else 228 #endif 229 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 230 return (error); 231 } 232 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 233 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 234 235 #ifdef SCTL_MASK32 236 int adaptive_machine_arch = 1; 237 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 238 &adaptive_machine_arch, 1, 239 "Adapt reported machine architecture to the ABI of the binary"); 240 #endif 241 242 static int 243 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 244 { 245 int error; 246 static const char machine_arch[] = MACHINE_ARCH; 247 #ifdef SCTL_MASK32 248 static const char machine_arch32[] = MACHINE_ARCH32; 249 250 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 251 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 252 else 253 #endif 254 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 255 return (error); 256 257 } 258 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 259 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 260 "System architecture"); 261 262 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 263 #ifdef COMPAT_FREEBSD32 264 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 265 #else 266 MACHINE_ARCH, 0, "Supported architectures for binaries"); 267 #endif 268 269 static int 270 sysctl_hostname(SYSCTL_HANDLER_ARGS) 271 { 272 struct prison *pr, *cpr; 273 size_t pr_offset; 274 char tmpname[MAXHOSTNAMELEN]; 275 int descend, error, len; 276 277 /* 278 * This function can set: hostname domainname hostuuid. 279 * Keep that in mind when comments say "hostname". 280 */ 281 pr_offset = (size_t)arg1; 282 len = arg2; 283 KASSERT(len <= sizeof(tmpname), 284 ("length %d too long for %s", len, __func__)); 285 286 pr = req->td->td_ucred->cr_prison; 287 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 288 return (EPERM); 289 /* 290 * Make a local copy of hostname to get/set so we don't have to hold 291 * the jail mutex during the sysctl copyin/copyout activities. 292 */ 293 mtx_lock(&pr->pr_mtx); 294 bcopy((char *)pr + pr_offset, tmpname, len); 295 mtx_unlock(&pr->pr_mtx); 296 297 error = sysctl_handle_string(oidp, tmpname, len, req); 298 299 if (req->newptr != NULL && error == 0) { 300 /* 301 * Copy the locally set hostname to all jails that share 302 * this host info. 303 */ 304 sx_slock(&allprison_lock); 305 while (!(pr->pr_flags & PR_HOST)) 306 pr = pr->pr_parent; 307 mtx_lock(&pr->pr_mtx); 308 bcopy(tmpname, (char *)pr + pr_offset, len); 309 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 310 if (cpr->pr_flags & PR_HOST) 311 descend = 0; 312 else 313 bcopy(tmpname, (char *)cpr + pr_offset, len); 314 mtx_unlock(&pr->pr_mtx); 315 sx_sunlock(&allprison_lock); 316 } 317 return (error); 318 } 319 320 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 321 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 322 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 323 sysctl_hostname, "A", "Hostname"); 324 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 325 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 326 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 327 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 328 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 329 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 330 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 331 sysctl_hostname, "A", "Host UUID"); 332 333 static int regression_securelevel_nonmonotonic = 0; 334 335 #ifdef REGRESSION 336 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 337 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 338 #endif 339 340 static int 341 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 342 { 343 struct prison *pr, *cpr; 344 int descend, error, level; 345 346 pr = req->td->td_ucred->cr_prison; 347 348 /* 349 * Reading the securelevel is easy, since the current jail's level 350 * is known to be at least as secure as any higher levels. Perform 351 * a lockless read since the securelevel is an integer. 352 */ 353 level = pr->pr_securelevel; 354 error = sysctl_handle_int(oidp, &level, 0, req); 355 if (error || !req->newptr) 356 return (error); 357 /* Permit update only if the new securelevel exceeds the old. */ 358 sx_slock(&allprison_lock); 359 mtx_lock(&pr->pr_mtx); 360 if (!regression_securelevel_nonmonotonic && 361 level < pr->pr_securelevel) { 362 mtx_unlock(&pr->pr_mtx); 363 sx_sunlock(&allprison_lock); 364 return (EPERM); 365 } 366 pr->pr_securelevel = level; 367 /* 368 * Set all child jails to be at least this level, but do not lower 369 * them (even if regression_securelevel_nonmonotonic). 370 */ 371 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 372 if (cpr->pr_securelevel < level) 373 cpr->pr_securelevel = level; 374 } 375 mtx_unlock(&pr->pr_mtx); 376 sx_sunlock(&allprison_lock); 377 return (error); 378 } 379 380 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 381 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 382 "I", "Current secure level"); 383 384 #ifdef INCLUDE_CONFIG_FILE 385 /* Actual kernel configuration options. */ 386 extern char kernconfstring[]; 387 388 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 389 kernconfstring, 0, "Kernel configuration file"); 390 #endif 391 392 static int 393 sysctl_hostid(SYSCTL_HANDLER_ARGS) 394 { 395 struct prison *pr, *cpr; 396 u_long tmpid; 397 int descend, error; 398 399 /* 400 * Like sysctl_hostname, except it operates on a u_long 401 * instead of a string, and is used only for hostid. 402 */ 403 pr = req->td->td_ucred->cr_prison; 404 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 405 return (EPERM); 406 tmpid = pr->pr_hostid; 407 error = sysctl_handle_long(oidp, &tmpid, 0, req); 408 409 if (req->newptr != NULL && error == 0) { 410 sx_slock(&allprison_lock); 411 while (!(pr->pr_flags & PR_HOST)) 412 pr = pr->pr_parent; 413 mtx_lock(&pr->pr_mtx); 414 pr->pr_hostid = tmpid; 415 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 416 if (cpr->pr_flags & PR_HOST) 417 descend = 0; 418 else 419 cpr->pr_hostid = tmpid; 420 mtx_unlock(&pr->pr_mtx); 421 sx_sunlock(&allprison_lock); 422 } 423 return (error); 424 } 425 426 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 427 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 428 NULL, 0, sysctl_hostid, "LU", "Host ID"); 429 430 /* 431 * The osrelease string is copied from the global (osrelease in vers.c) into 432 * prison0 by a sysinit and is inherited by child jails if not changed at jail 433 * creation, so we always return the copy from the current prison data. 434 */ 435 static int 436 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 437 { 438 struct prison *pr; 439 440 pr = req->td->td_ucred->cr_prison; 441 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 442 443 } 444 445 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 446 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 447 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 448 449 /* 450 * The osreldate number is copied from the global (osreldate in vers.c) into 451 * prison0 by a sysinit and is inherited by child jails if not changed at jail 452 * creation, so we always return the value from the current prison data. 453 */ 454 static int 455 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 456 { 457 struct prison *pr; 458 459 pr = req->td->td_ucred->cr_prison; 460 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 461 462 } 463 464 /* 465 * NOTICE: The *userland* release date is available in 466 * /usr/include/osreldate.h 467 */ 468 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 469 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 470 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 471 472 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 473 474 #ifdef COMPAT_FREEBSD4 475 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 476 #endif 477 478 #ifdef COMPAT_FREEBSD5 479 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 480 #endif 481 482 #ifdef COMPAT_FREEBSD6 483 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 484 #endif 485 486 #ifdef COMPAT_FREEBSD7 487 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 488 #endif 489 490 /* 491 * This is really cheating. These actually live in the libc, something 492 * which I'm not quite sure is a good idea anyway, but in order for 493 * getnext and friends to actually work, we define dummies here. 494 * 495 * XXXRW: These probably should be CTLFLAG_CAPRD. 496 */ 497 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 498 "", 0, "PATH that finds all the standard utilities"); 499 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 500 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 501 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 502 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 503 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 504 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 505 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 506 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 507 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 508 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 509 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 510 SYSCTL_NULL_INT_PTR, 0, ""); 511 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 512 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 513 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 514 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 515 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 516 SYSCTL_NULL_INT_PTR, 0, 517 "The version of POSIX 1003.2 with which the system attempts to comply"); 518 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 519 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 520 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 521 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 522 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, ""); 524 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 526 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 528 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 530 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 532 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 534 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 536 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 537 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 538 539 #include <sys/vnode.h> 540 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 541 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 542 543 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 544 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 545 546 static int 547 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 548 { 549 int error, pm; 550 551 pm = pid_max; 552 error = sysctl_handle_int(oidp, &pm, 0, req); 553 if (error || !req->newptr) 554 return (error); 555 sx_xlock(&proctree_lock); 556 sx_xlock(&allproc_lock); 557 558 /* 559 * Only permit the values less then PID_MAX. 560 * As a safety measure, do not allow to limit the pid_max too much. 561 */ 562 if (pm < 300 || pm > PID_MAX) 563 error = EINVAL; 564 else 565 pid_max = pm; 566 sx_xunlock(&allproc_lock); 567 sx_xunlock(&proctree_lock); 568 return (error); 569 } 570 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 571 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 572 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 573 574 #include <sys/bio.h> 575 #include <sys/buf.h> 576 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 577 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 578 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 579 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 580 581 #include <sys/user.h> 582 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 583 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 584 585 /* Used by kernel debuggers. */ 586 const int pcb_size = sizeof(struct pcb); 587 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 588 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 589 590 /* XXX compatibility, remove for 6.0 */ 591 #include <sys/imgact.h> 592 #include <sys/imgact_elf.h> 593 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 594 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 595 "compatibility for kern.fallback_elf_brand");
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