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/10.3/sys/kern/kern_mib.c 294283 2016-01-18 18:27:21Z jhb $"); 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/kernel.h> 47 #include <sys/sbuf.h> 48 #include <sys/systm.h> 49 #include <sys/sysctl.h> 50 #include <sys/proc.h> 51 #include <sys/lock.h> 52 #include <sys/mutex.h> 53 #include <sys/jail.h> 54 #include <sys/smp.h> 55 #include <sys/sx.h> 56 #include <sys/unistd.h> 57 58 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 59 "Sysctl internal magic"); 60 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 61 "High kernel, proc, limits &c"); 62 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 63 "Virtual memory"); 64 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 65 "File system"); 66 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 67 "Network, (see socket.h)"); 68 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 69 "Debugging"); 70 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 71 "Sizeof various things"); 72 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 73 "hardware"); 74 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 75 "machine dependent"); 76 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 77 "user-level"); 78 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 79 "p1003_1b, (see p1003_1b.h)"); 80 81 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 82 "Compatibility code"); 83 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 84 "Security"); 85 #ifdef REGRESSION 86 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 87 "Regression test MIB"); 88 #endif 89 90 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 91 kern_ident, 0, "Kernel identifier"); 92 93 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 94 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 95 96 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 97 version, 0, "Kernel version"); 98 99 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 100 compiler_version, 0, "Version of compiler used to compile kernel"); 101 102 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 103 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 104 105 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN, 106 &maxproc, 0, "Maximum number of processes"); 107 108 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 109 &maxprocperuid, 0, "Maximum processes allowed per userid"); 110 111 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN, 112 &maxusers, 0, "Hint for kernel tuning"); 113 114 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 115 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 116 117 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 118 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 119 120 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN|CTLFLAG_CAPRD, 121 &ngroups_max, 0, 122 "Maximum number of supplemental groups a user can belong to"); 123 124 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 125 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 126 127 #ifdef _POSIX_SAVED_IDS 128 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 129 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 130 #else 131 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 132 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 133 #endif 134 135 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 136 137 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 138 kernelname, sizeof kernelname, "Name of kernel file booted"); 139 140 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 141 &mp_ncpus, 0, "Number of active CPUs"); 142 143 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 144 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 145 146 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 147 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 148 149 static int 150 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 151 { 152 char buf[256]; 153 size_t len; 154 155 len = req->oldlen; 156 if (len > sizeof(buf)) 157 len = sizeof(buf); 158 arc4rand(buf, len, 0); 159 return (SYSCTL_OUT(req, buf, len)); 160 } 161 162 SYSCTL_PROC(_kern, KERN_ARND, arandom, 163 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 164 sysctl_kern_arnd, "", "arc4rand"); 165 166 static int 167 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 168 { 169 u_long val; 170 171 val = ctob(physmem); 172 return (sysctl_handle_long(oidp, &val, 0, req)); 173 } 174 175 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 176 0, 0, sysctl_hw_physmem, "LU", ""); 177 178 static int 179 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 180 { 181 u_long val; 182 val = ctob(realmem); 183 return (sysctl_handle_long(oidp, &val, 0, req)); 184 } 185 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 186 0, 0, sysctl_hw_realmem, "LU", ""); 187 static int 188 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 189 { 190 u_long val; 191 192 val = ctob(physmem - cnt.v_wire_count); 193 return (sysctl_handle_long(oidp, &val, 0, req)); 194 } 195 196 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 197 0, 0, sysctl_hw_usermem, "LU", ""); 198 199 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 200 201 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 202 203 static int 204 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 205 { 206 int error; 207 #ifdef SCTL_MASK32 208 int i; 209 uint32_t pagesizes32[MAXPAGESIZES]; 210 211 if (req->flags & SCTL_MASK32) { 212 /* 213 * Recreate the "pagesizes" array with 32-bit elements. Truncate 214 * any page size greater than UINT32_MAX to zero. 215 */ 216 for (i = 0; i < MAXPAGESIZES; i++) 217 pagesizes32[i] = (uint32_t)pagesizes[i]; 218 219 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 220 } else 221 #endif 222 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 223 return (error); 224 } 225 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 226 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 227 228 #ifdef SCTL_MASK32 229 int adaptive_machine_arch = 1; 230 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 231 &adaptive_machine_arch, 1, 232 "Adapt reported machine architecture to the ABI of the binary"); 233 #endif 234 235 static int 236 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 237 { 238 int error; 239 static const char machine_arch[] = MACHINE_ARCH; 240 #ifdef SCTL_MASK32 241 static const char machine_arch32[] = MACHINE_ARCH32; 242 243 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 244 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 245 else 246 #endif 247 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 248 return (error); 249 250 } 251 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD, 252 NULL, 0, sysctl_hw_machine_arch, "A", "System architecture"); 253 254 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 255 #ifdef COMPAT_FREEBSD32 256 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 257 #else 258 MACHINE_ARCH, 0, "Supported architectures for binaries"); 259 #endif 260 261 static int 262 sysctl_hostname(SYSCTL_HANDLER_ARGS) 263 { 264 struct prison *pr, *cpr; 265 size_t pr_offset; 266 char tmpname[MAXHOSTNAMELEN]; 267 int descend, error, len; 268 269 /* 270 * This function can set: hostname domainname hostuuid. 271 * Keep that in mind when comments say "hostname". 272 */ 273 pr_offset = (size_t)arg1; 274 len = arg2; 275 KASSERT(len <= sizeof(tmpname), 276 ("length %d too long for %s", len, __func__)); 277 278 pr = req->td->td_ucred->cr_prison; 279 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 280 return (EPERM); 281 /* 282 * Make a local copy of hostname to get/set so we don't have to hold 283 * the jail mutex during the sysctl copyin/copyout activities. 284 */ 285 mtx_lock(&pr->pr_mtx); 286 bcopy((char *)pr + pr_offset, tmpname, len); 287 mtx_unlock(&pr->pr_mtx); 288 289 error = sysctl_handle_string(oidp, tmpname, len, req); 290 291 if (req->newptr != NULL && error == 0) { 292 /* 293 * Copy the locally set hostname to all jails that share 294 * this host info. 295 */ 296 sx_slock(&allprison_lock); 297 while (!(pr->pr_flags & PR_HOST)) 298 pr = pr->pr_parent; 299 mtx_lock(&pr->pr_mtx); 300 bcopy(tmpname, (char *)pr + pr_offset, len); 301 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 302 if (cpr->pr_flags & PR_HOST) 303 descend = 0; 304 else 305 bcopy(tmpname, (char *)cpr + pr_offset, len); 306 mtx_unlock(&pr->pr_mtx); 307 sx_sunlock(&allprison_lock); 308 } 309 return (error); 310 } 311 312 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 313 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 314 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 315 sysctl_hostname, "A", "Hostname"); 316 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 317 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 318 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 319 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 320 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 321 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 322 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 323 sysctl_hostname, "A", "Host UUID"); 324 325 static int regression_securelevel_nonmonotonic = 0; 326 327 #ifdef REGRESSION 328 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 329 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 330 #endif 331 332 static int 333 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 334 { 335 struct prison *pr, *cpr; 336 int descend, error, level; 337 338 pr = req->td->td_ucred->cr_prison; 339 340 /* 341 * Reading the securelevel is easy, since the current jail's level 342 * is known to be at least as secure as any higher levels. Perform 343 * a lockless read since the securelevel is an integer. 344 */ 345 level = pr->pr_securelevel; 346 error = sysctl_handle_int(oidp, &level, 0, req); 347 if (error || !req->newptr) 348 return (error); 349 /* Permit update only if the new securelevel exceeds the old. */ 350 sx_slock(&allprison_lock); 351 mtx_lock(&pr->pr_mtx); 352 if (!regression_securelevel_nonmonotonic && 353 level < pr->pr_securelevel) { 354 mtx_unlock(&pr->pr_mtx); 355 sx_sunlock(&allprison_lock); 356 return (EPERM); 357 } 358 pr->pr_securelevel = level; 359 /* 360 * Set all child jails to be at least this level, but do not lower 361 * them (even if regression_securelevel_nonmonotonic). 362 */ 363 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 364 if (cpr->pr_securelevel < level) 365 cpr->pr_securelevel = level; 366 } 367 mtx_unlock(&pr->pr_mtx); 368 sx_sunlock(&allprison_lock); 369 return (error); 370 } 371 372 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 373 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 374 "I", "Current secure level"); 375 376 #ifdef INCLUDE_CONFIG_FILE 377 /* Actual kernel configuration options. */ 378 extern char kernconfstring[]; 379 380 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD, kernconfstring, 0, 381 "Kernel configuration file"); 382 #endif 383 384 static int 385 sysctl_hostid(SYSCTL_HANDLER_ARGS) 386 { 387 struct prison *pr, *cpr; 388 u_long tmpid; 389 int descend, error; 390 391 /* 392 * Like sysctl_hostname, except it operates on a u_long 393 * instead of a string, and is used only for hostid. 394 */ 395 pr = req->td->td_ucred->cr_prison; 396 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 397 return (EPERM); 398 tmpid = pr->pr_hostid; 399 error = sysctl_handle_long(oidp, &tmpid, 0, req); 400 401 if (req->newptr != NULL && error == 0) { 402 sx_slock(&allprison_lock); 403 while (!(pr->pr_flags & PR_HOST)) 404 pr = pr->pr_parent; 405 mtx_lock(&pr->pr_mtx); 406 pr->pr_hostid = tmpid; 407 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 408 if (cpr->pr_flags & PR_HOST) 409 descend = 0; 410 else 411 cpr->pr_hostid = tmpid; 412 mtx_unlock(&pr->pr_mtx); 413 sx_sunlock(&allprison_lock); 414 } 415 return (error); 416 } 417 418 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 419 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 420 NULL, 0, sysctl_hostid, "LU", "Host ID"); 421 422 /* 423 * The osrelease string is copied from the global (osrelease in vers.c) into 424 * prison0 by a sysinit and is inherited by child jails if not changed at jail 425 * creation, so we always return the copy from the current prison data. 426 */ 427 static int 428 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 429 { 430 struct prison *pr; 431 432 pr = req->td->td_ucred->cr_prison; 433 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 434 435 } 436 437 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 438 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 439 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 440 441 /* 442 * The osreldate number is copied from the global (osreldate in vers.c) into 443 * prison0 by a sysinit and is inherited by child jails if not changed at jail 444 * creation, so we always return the value from the current prison data. 445 */ 446 static int 447 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 448 { 449 struct prison *pr; 450 451 pr = req->td->td_ucred->cr_prison; 452 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 453 454 } 455 456 /* 457 * NOTICE: The *userland* release date is available in 458 * /usr/include/osreldate.h 459 */ 460 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 461 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 462 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 463 464 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 465 466 #ifdef COMPAT_FREEBSD4 467 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 468 #endif 469 470 #ifdef COMPAT_FREEBSD5 471 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 472 #endif 473 474 #ifdef COMPAT_FREEBSD6 475 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 476 #endif 477 478 #ifdef COMPAT_FREEBSD7 479 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 480 #endif 481 482 /* 483 * This is really cheating. These actually live in the libc, something 484 * which I'm not quite sure is a good idea anyway, but in order for 485 * getnext and friends to actually work, we define dummies here. 486 * 487 * XXXRW: These probably should be CTLFLAG_CAPRD. 488 */ 489 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 490 "", 0, "PATH that finds all the standard utilities"); 491 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 492 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 493 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 494 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 495 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 496 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 497 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 498 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 499 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 500 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 501 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 502 SYSCTL_NULL_INT_PTR, 0, ""); 503 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 504 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 505 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 506 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 507 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 508 SYSCTL_NULL_INT_PTR, 0, 509 "The version of POSIX 1003.2 with which the system attempts to comply"); 510 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 511 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 512 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 513 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 514 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 515 SYSCTL_NULL_INT_PTR, 0, ""); 516 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 517 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 518 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 519 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 520 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 521 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 522 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 524 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 526 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 528 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 530 531 #include <sys/vnode.h> 532 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 534 535 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 536 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 537 538 static int 539 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 540 { 541 int error, pm; 542 543 pm = pid_max; 544 error = sysctl_handle_int(oidp, &pm, 0, req); 545 if (error || !req->newptr) 546 return (error); 547 sx_xlock(&proctree_lock); 548 sx_xlock(&allproc_lock); 549 550 /* 551 * Only permit the values less then PID_MAX. 552 * As a safety measure, do not allow to limit the pid_max too much. 553 */ 554 if (pm < 300 || pm > PID_MAX) 555 error = EINVAL; 556 else 557 pid_max = pm; 558 sx_xunlock(&allproc_lock); 559 sx_xunlock(&proctree_lock); 560 return (error); 561 } 562 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_TUN | 563 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I", 564 "Maximum allowed pid"); 565 566 #include <sys/bio.h> 567 #include <sys/buf.h> 568 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 569 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 570 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 571 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 572 573 #include <sys/user.h> 574 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 575 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 576 577 /* Used by kernel debuggers. */ 578 const int pcb_size = sizeof(struct pcb); 579 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 580 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 581 582 /* XXX compatibility, remove for 6.0 */ 583 #include <sys/imgact.h> 584 #include <sys/imgact_elf.h> 585 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 586 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 587 "compatibility for kern.fallback_elf_brand");
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