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("$FreeBSD$"); 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, 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 NULL, 0, sysctl_hw_machine_arch, "A", "System architecture"); 259 260 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 261 #ifdef COMPAT_FREEBSD32 262 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 263 #else 264 MACHINE_ARCH, 0, "Supported architectures for binaries"); 265 #endif 266 267 static int 268 sysctl_hostname(SYSCTL_HANDLER_ARGS) 269 { 270 struct prison *pr, *cpr; 271 size_t pr_offset; 272 char tmpname[MAXHOSTNAMELEN]; 273 int descend, error, len; 274 275 /* 276 * This function can set: hostname domainname hostuuid. 277 * Keep that in mind when comments say "hostname". 278 */ 279 pr_offset = (size_t)arg1; 280 len = arg2; 281 KASSERT(len <= sizeof(tmpname), 282 ("length %d too long for %s", len, __func__)); 283 284 pr = req->td->td_ucred->cr_prison; 285 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 286 return (EPERM); 287 /* 288 * Make a local copy of hostname to get/set so we don't have to hold 289 * the jail mutex during the sysctl copyin/copyout activities. 290 */ 291 mtx_lock(&pr->pr_mtx); 292 bcopy((char *)pr + pr_offset, tmpname, len); 293 mtx_unlock(&pr->pr_mtx); 294 295 error = sysctl_handle_string(oidp, tmpname, len, req); 296 297 if (req->newptr != NULL && error == 0) { 298 /* 299 * Copy the locally set hostname to all jails that share 300 * this host info. 301 */ 302 sx_slock(&allprison_lock); 303 while (!(pr->pr_flags & PR_HOST)) 304 pr = pr->pr_parent; 305 mtx_lock(&pr->pr_mtx); 306 bcopy(tmpname, (char *)pr + pr_offset, len); 307 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 308 if (cpr->pr_flags & PR_HOST) 309 descend = 0; 310 else 311 bcopy(tmpname, (char *)cpr + pr_offset, len); 312 mtx_unlock(&pr->pr_mtx); 313 sx_sunlock(&allprison_lock); 314 } 315 return (error); 316 } 317 318 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 319 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 320 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 321 sysctl_hostname, "A", "Hostname"); 322 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 323 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 324 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 325 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 326 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 327 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 328 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 329 sysctl_hostname, "A", "Host UUID"); 330 331 static int regression_securelevel_nonmonotonic = 0; 332 333 #ifdef REGRESSION 334 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 335 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 336 #endif 337 338 static int 339 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 340 { 341 struct prison *pr, *cpr; 342 int descend, error, level; 343 344 pr = req->td->td_ucred->cr_prison; 345 346 /* 347 * Reading the securelevel is easy, since the current jail's level 348 * is known to be at least as secure as any higher levels. Perform 349 * a lockless read since the securelevel is an integer. 350 */ 351 level = pr->pr_securelevel; 352 error = sysctl_handle_int(oidp, &level, 0, req); 353 if (error || !req->newptr) 354 return (error); 355 /* Permit update only if the new securelevel exceeds the old. */ 356 sx_slock(&allprison_lock); 357 mtx_lock(&pr->pr_mtx); 358 if (!regression_securelevel_nonmonotonic && 359 level < pr->pr_securelevel) { 360 mtx_unlock(&pr->pr_mtx); 361 sx_sunlock(&allprison_lock); 362 return (EPERM); 363 } 364 pr->pr_securelevel = level; 365 /* 366 * Set all child jails to be at least this level, but do not lower 367 * them (even if regression_securelevel_nonmonotonic). 368 */ 369 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 370 if (cpr->pr_securelevel < level) 371 cpr->pr_securelevel = level; 372 } 373 mtx_unlock(&pr->pr_mtx); 374 sx_sunlock(&allprison_lock); 375 return (error); 376 } 377 378 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 379 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 380 "I", "Current secure level"); 381 382 #ifdef INCLUDE_CONFIG_FILE 383 /* Actual kernel configuration options. */ 384 extern char kernconfstring[]; 385 386 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD, kernconfstring, 0, 387 "Kernel configuration file"); 388 #endif 389 390 static int 391 sysctl_hostid(SYSCTL_HANDLER_ARGS) 392 { 393 struct prison *pr, *cpr; 394 u_long tmpid; 395 int descend, error; 396 397 /* 398 * Like sysctl_hostname, except it operates on a u_long 399 * instead of a string, and is used only for hostid. 400 */ 401 pr = req->td->td_ucred->cr_prison; 402 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 403 return (EPERM); 404 tmpid = pr->pr_hostid; 405 error = sysctl_handle_long(oidp, &tmpid, 0, req); 406 407 if (req->newptr != NULL && error == 0) { 408 sx_slock(&allprison_lock); 409 while (!(pr->pr_flags & PR_HOST)) 410 pr = pr->pr_parent; 411 mtx_lock(&pr->pr_mtx); 412 pr->pr_hostid = tmpid; 413 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 414 if (cpr->pr_flags & PR_HOST) 415 descend = 0; 416 else 417 cpr->pr_hostid = tmpid; 418 mtx_unlock(&pr->pr_mtx); 419 sx_sunlock(&allprison_lock); 420 } 421 return (error); 422 } 423 424 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 425 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 426 NULL, 0, sysctl_hostid, "LU", "Host ID"); 427 428 /* 429 * The osrelease string is copied from the global (osrelease in vers.c) into 430 * prison0 by a sysinit and is inherited by child jails if not changed at jail 431 * creation, so we always return the copy from the current prison data. 432 */ 433 static int 434 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 435 { 436 struct prison *pr; 437 438 pr = req->td->td_ucred->cr_prison; 439 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 440 441 } 442 443 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 444 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 445 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 446 447 /* 448 * The osreldate number is copied from the global (osreldate in vers.c) into 449 * prison0 by a sysinit and is inherited by child jails if not changed at jail 450 * creation, so we always return the value from the current prison data. 451 */ 452 static int 453 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 454 { 455 struct prison *pr; 456 457 pr = req->td->td_ucred->cr_prison; 458 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 459 460 } 461 462 /* 463 * NOTICE: The *userland* release date is available in 464 * /usr/include/osreldate.h 465 */ 466 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 467 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 468 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 469 470 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 471 472 #ifdef COMPAT_FREEBSD4 473 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 474 #endif 475 476 #ifdef COMPAT_FREEBSD5 477 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 478 #endif 479 480 #ifdef COMPAT_FREEBSD6 481 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 482 #endif 483 484 #ifdef COMPAT_FREEBSD7 485 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 486 #endif 487 488 /* 489 * This is really cheating. These actually live in the libc, something 490 * which I'm not quite sure is a good idea anyway, but in order for 491 * getnext and friends to actually work, we define dummies here. 492 * 493 * XXXRW: These probably should be CTLFLAG_CAPRD. 494 */ 495 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 496 "", 0, "PATH that finds all the standard utilities"); 497 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 498 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 499 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 500 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 501 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 502 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 503 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 504 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 505 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 506 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 507 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 508 SYSCTL_NULL_INT_PTR, 0, ""); 509 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 510 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 511 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 512 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 513 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 514 SYSCTL_NULL_INT_PTR, 0, 515 "The version of POSIX 1003.2 with which the system attempts to comply"); 516 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 517 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 518 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 519 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 520 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 521 SYSCTL_NULL_INT_PTR, 0, ""); 522 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 524 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 526 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 528 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 530 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 532 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 534 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 536 537 #include <sys/vnode.h> 538 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 539 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 540 541 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 542 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 543 544 static int 545 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 546 { 547 int error, pm; 548 549 pm = pid_max; 550 error = sysctl_handle_int(oidp, &pm, 0, req); 551 if (error || !req->newptr) 552 return (error); 553 sx_xlock(&proctree_lock); 554 sx_xlock(&allproc_lock); 555 556 /* 557 * Only permit the values less then PID_MAX. 558 * As a safety measure, do not allow to limit the pid_max too much. 559 */ 560 if (pm < 300 || pm > PID_MAX) 561 error = EINVAL; 562 else 563 pid_max = pm; 564 sx_xunlock(&allproc_lock); 565 sx_xunlock(&proctree_lock); 566 return (error); 567 } 568 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 569 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 570 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 571 572 #include <sys/bio.h> 573 #include <sys/buf.h> 574 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 575 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 576 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 577 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 578 579 #include <sys/user.h> 580 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 581 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 582 583 /* Used by kernel debuggers. */ 584 const int pcb_size = sizeof(struct pcb); 585 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 586 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 587 588 /* XXX compatibility, remove for 6.0 */ 589 #include <sys/imgact.h> 590 #include <sys/imgact_elf.h> 591 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 592 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 593 "compatibility for kern.fallback_elf_brand"); 594