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