1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 11 * project, to make these variables more userfriendly. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include "opt_posix.h" 44 #include "opt_config.h" 45 46 #include <sys/param.h> 47 #include <sys/jail.h> 48 #include <sys/kernel.h> 49 #include <sys/limits.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/proc.h> 53 #include <sys/random.h> 54 #include <sys/sbuf.h> 55 #include <sys/smp.h> 56 #include <sys/sx.h> 57 #include <sys/vmmeter.h> 58 #include <sys/sysctl.h> 59 #include <sys/systm.h> 60 #include <sys/unistd.h> 61 62 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 63 "Sysctl internal magic"); 64 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 65 "High kernel, proc, limits &c"); 66 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 67 "Virtual memory"); 68 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 69 "File system"); 70 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 71 "Network, (see socket.h)"); 72 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 73 "Debugging"); 74 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 75 "Sizeof various things"); 76 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 77 "hardware"); 78 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 79 "machine dependent"); 80 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 81 "user-level"); 82 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 83 "p1003_1b, (see p1003_1b.h)"); 84 85 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 86 "Compatibility code"); 87 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 88 "Security"); 89 #ifdef REGRESSION 90 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 91 "Regression test MIB"); 92 #endif 93 94 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 95 kern_ident, 0, "Kernel identifier"); 96 97 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 98 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 99 100 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 101 version, 0, "Kernel version"); 102 103 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 104 compiler_version, 0, "Version of compiler used to compile kernel"); 105 106 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 107 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 108 109 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 110 &maxproc, 0, "Maximum number of processes"); 111 112 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 113 &maxprocperuid, 0, "Maximum processes allowed per userid"); 114 115 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 116 &maxusers, 0, "Hint for kernel tuning"); 117 118 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 119 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 120 121 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 122 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 123 124 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 125 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 126 "Maximum number of supplemental groups a user can belong to"); 127 128 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 129 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 130 131 #ifdef _POSIX_SAVED_IDS 132 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 133 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 134 #else 135 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 136 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 137 #endif 138 139 char kernelname[MAXPATHLEN] = "/boot/kernel/kernel"; /* XXX bloat */ 140 141 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 142 kernelname, sizeof kernelname, "Name of kernel file booted"); 143 144 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, 145 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); 146 147 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 148 &mp_ncpus, 0, "Number of active CPUs"); 149 150 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 151 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 152 153 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 154 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 155 156 static int 157 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 158 { 159 char buf[256]; 160 size_t len; 161 162 len = MIN(req->oldlen, sizeof(buf)); 163 read_random(buf, len); 164 return (SYSCTL_OUT(req, buf, len)); 165 } 166 167 SYSCTL_PROC(_kern, KERN_ARND, arandom, 168 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 169 sysctl_kern_arnd, "", "arc4rand"); 170 171 static int 172 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 173 { 174 u_long val, p; 175 176 p = SIZE_T_MAX >> PAGE_SHIFT; 177 if (physmem < p) 178 p = physmem; 179 val = ctob(p); 180 return (sysctl_handle_long(oidp, &val, 0, req)); 181 } 182 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 183 0, 0, sysctl_hw_physmem, "LU", 184 "Amount of physical memory (in bytes)"); 185 186 static int 187 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 188 { 189 u_long val, p; 190 191 p = SIZE_T_MAX >> PAGE_SHIFT; 192 if (realmem < p) 193 p = realmem; 194 val = ctob(p); 195 return (sysctl_handle_long(oidp, &val, 0, req)); 196 } 197 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 198 0, 0, sysctl_hw_realmem, "LU", 199 "Amount of memory (in bytes) reported by the firmware"); 200 201 static int 202 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 203 { 204 u_long val, p, p1; 205 206 p1 = physmem - vm_wire_count(); 207 p = SIZE_T_MAX >> PAGE_SHIFT; 208 if (p1 < p) 209 p = p1; 210 val = ctob(p); 211 return (sysctl_handle_long(oidp, &val, 0, req)); 212 } 213 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 214 0, 0, sysctl_hw_usermem, "LU", 215 "Amount of memory (in bytes) which is not wired"); 216 217 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, 218 "Amount of physical memory (in pages)"); 219 220 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 221 222 static int 223 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 224 { 225 int error; 226 #ifdef SCTL_MASK32 227 int i; 228 uint32_t pagesizes32[MAXPAGESIZES]; 229 230 if (req->flags & SCTL_MASK32) { 231 /* 232 * Recreate the "pagesizes" array with 32-bit elements. Truncate 233 * any page size greater than UINT32_MAX to zero. 234 */ 235 for (i = 0; i < MAXPAGESIZES; i++) 236 pagesizes32[i] = (uint32_t)pagesizes[i]; 237 238 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 239 } else 240 #endif 241 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 242 return (error); 243 } 244 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 245 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 246 247 #ifdef SCTL_MASK32 248 int adaptive_machine_arch = 1; 249 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 250 &adaptive_machine_arch, 1, 251 "Adapt reported machine architecture to the ABI of the binary"); 252 #endif 253 254 static int 255 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 256 { 257 int error; 258 static const char machine_arch[] = MACHINE_ARCH; 259 #ifdef SCTL_MASK32 260 static const char machine_arch32[] = MACHINE_ARCH32; 261 262 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 263 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 264 else 265 #endif 266 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 267 return (error); 268 269 } 270 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 271 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 272 "System architecture"); 273 274 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 275 #ifdef COMPAT_FREEBSD32 276 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 277 #else 278 MACHINE_ARCH, 0, "Supported architectures for binaries"); 279 #endif 280 281 static int 282 sysctl_hostname(SYSCTL_HANDLER_ARGS) 283 { 284 struct prison *pr, *cpr; 285 size_t pr_offset; 286 char tmpname[MAXHOSTNAMELEN]; 287 int descend, error, len; 288 289 /* 290 * This function can set: hostname domainname hostuuid. 291 * Keep that in mind when comments say "hostname". 292 */ 293 pr_offset = (size_t)arg1; 294 len = arg2; 295 KASSERT(len <= sizeof(tmpname), 296 ("length %d too long for %s", len, __func__)); 297 298 pr = req->td->td_ucred->cr_prison; 299 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 300 return (EPERM); 301 /* 302 * Make a local copy of hostname to get/set so we don't have to hold 303 * the jail mutex during the sysctl copyin/copyout activities. 304 */ 305 mtx_lock(&pr->pr_mtx); 306 bcopy((char *)pr + pr_offset, tmpname, len); 307 mtx_unlock(&pr->pr_mtx); 308 309 error = sysctl_handle_string(oidp, tmpname, len, req); 310 311 if (req->newptr != NULL && error == 0) { 312 /* 313 * Copy the locally set hostname to all jails that share 314 * this host info. 315 */ 316 sx_slock(&allprison_lock); 317 while (!(pr->pr_flags & PR_HOST)) 318 pr = pr->pr_parent; 319 mtx_lock(&pr->pr_mtx); 320 bcopy(tmpname, (char *)pr + pr_offset, len); 321 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 322 if (cpr->pr_flags & PR_HOST) 323 descend = 0; 324 else 325 bcopy(tmpname, (char *)cpr + pr_offset, len); 326 mtx_unlock(&pr->pr_mtx); 327 sx_sunlock(&allprison_lock); 328 } 329 return (error); 330 } 331 332 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 333 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 334 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 335 sysctl_hostname, "A", "Hostname"); 336 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 337 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 338 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 339 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 340 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 341 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 342 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 343 sysctl_hostname, "A", "Host UUID"); 344 345 static int regression_securelevel_nonmonotonic = 0; 346 347 #ifdef REGRESSION 348 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 349 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 350 #endif 351 352 static int 353 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 354 { 355 struct prison *pr, *cpr; 356 int descend, error, level; 357 358 pr = req->td->td_ucred->cr_prison; 359 360 /* 361 * Reading the securelevel is easy, since the current jail's level 362 * is known to be at least as secure as any higher levels. Perform 363 * a lockless read since the securelevel is an integer. 364 */ 365 level = pr->pr_securelevel; 366 error = sysctl_handle_int(oidp, &level, 0, req); 367 if (error || !req->newptr) 368 return (error); 369 /* Permit update only if the new securelevel exceeds the old. */ 370 sx_slock(&allprison_lock); 371 mtx_lock(&pr->pr_mtx); 372 if (!regression_securelevel_nonmonotonic && 373 level < pr->pr_securelevel) { 374 mtx_unlock(&pr->pr_mtx); 375 sx_sunlock(&allprison_lock); 376 return (EPERM); 377 } 378 pr->pr_securelevel = level; 379 /* 380 * Set all child jails to be at least this level, but do not lower 381 * them (even if regression_securelevel_nonmonotonic). 382 */ 383 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 384 if (cpr->pr_securelevel < level) 385 cpr->pr_securelevel = level; 386 } 387 mtx_unlock(&pr->pr_mtx); 388 sx_sunlock(&allprison_lock); 389 return (error); 390 } 391 392 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 393 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 394 "I", "Current secure level"); 395 396 #ifdef INCLUDE_CONFIG_FILE 397 /* Actual kernel configuration options. */ 398 extern char kernconfstring[]; 399 400 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 401 kernconfstring, 0, "Kernel configuration file"); 402 #endif 403 404 static int 405 sysctl_hostid(SYSCTL_HANDLER_ARGS) 406 { 407 struct prison *pr, *cpr; 408 u_long tmpid; 409 int descend, error; 410 411 /* 412 * Like sysctl_hostname, except it operates on a u_long 413 * instead of a string, and is used only for hostid. 414 */ 415 pr = req->td->td_ucred->cr_prison; 416 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 417 return (EPERM); 418 tmpid = pr->pr_hostid; 419 error = sysctl_handle_long(oidp, &tmpid, 0, req); 420 421 if (req->newptr != NULL && error == 0) { 422 sx_slock(&allprison_lock); 423 while (!(pr->pr_flags & PR_HOST)) 424 pr = pr->pr_parent; 425 mtx_lock(&pr->pr_mtx); 426 pr->pr_hostid = tmpid; 427 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 428 if (cpr->pr_flags & PR_HOST) 429 descend = 0; 430 else 431 cpr->pr_hostid = tmpid; 432 mtx_unlock(&pr->pr_mtx); 433 sx_sunlock(&allprison_lock); 434 } 435 return (error); 436 } 437 438 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 439 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 440 NULL, 0, sysctl_hostid, "LU", "Host ID"); 441 442 /* 443 * The osrelease string is copied from the global (osrelease in vers.c) into 444 * prison0 by a sysinit and is inherited by child jails if not changed at jail 445 * creation, so we always return the copy from the current prison data. 446 */ 447 static int 448 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 449 { 450 struct prison *pr; 451 452 pr = req->td->td_ucred->cr_prison; 453 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 454 455 } 456 457 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 458 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 459 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 460 461 /* 462 * The osreldate number is copied from the global (osreldate in vers.c) into 463 * prison0 by a sysinit and is inherited by child jails if not changed at jail 464 * creation, so we always return the value from the current prison data. 465 */ 466 static int 467 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 468 { 469 struct prison *pr; 470 471 pr = req->td->td_ucred->cr_prison; 472 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 473 474 } 475 476 /* 477 * NOTICE: The *userland* release date is available in 478 * /usr/include/osreldate.h 479 */ 480 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 481 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 482 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 483 484 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 485 486 #ifdef COMPAT_FREEBSD4 487 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 488 #endif 489 490 #ifdef COMPAT_FREEBSD5 491 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 492 #endif 493 494 #ifdef COMPAT_FREEBSD6 495 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 496 #endif 497 498 #ifdef COMPAT_FREEBSD7 499 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 500 #endif 501 502 /* 503 * This is really cheating. These actually live in the libc, something 504 * which I'm not quite sure is a good idea anyway, but in order for 505 * getnext and friends to actually work, we define dummies here. 506 * 507 * XXXRW: These probably should be CTLFLAG_CAPRD. 508 */ 509 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 510 "", 0, "PATH that finds all the standard utilities"); 511 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 512 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 513 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 514 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 515 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 516 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 517 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 518 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 519 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 520 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 521 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 522 SYSCTL_NULL_INT_PTR, 0, ""); 523 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 524 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 525 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 526 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 527 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 528 SYSCTL_NULL_INT_PTR, 0, 529 "The version of POSIX 1003.2 with which the system attempts to comply"); 530 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 532 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 534 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, ""); 536 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 537 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 538 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 539 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 540 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 541 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 542 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 543 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 544 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 545 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 546 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 547 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 548 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 549 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 550 551 #include <sys/vnode.h> 552 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 553 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 554 555 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 556 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 557 558 static int 559 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 560 { 561 int error, pm; 562 563 pm = pid_max; 564 error = sysctl_handle_int(oidp, &pm, 0, req); 565 if (error || !req->newptr) 566 return (error); 567 sx_xlock(&proctree_lock); 568 sx_xlock(&allproc_lock); 569 570 /* 571 * Only permit the values less then PID_MAX. 572 * As a safety measure, do not allow to limit the pid_max too much. 573 */ 574 if (pm < 300 || pm > PID_MAX) 575 error = EINVAL; 576 else 577 pid_max = pm; 578 sx_xunlock(&allproc_lock); 579 sx_xunlock(&proctree_lock); 580 return (error); 581 } 582 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 583 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 584 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 585 586 #include <sys/bio.h> 587 #include <sys/buf.h> 588 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 589 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 590 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 591 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 592 593 #include <sys/user.h> 594 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 595 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 596 597 /* Used by kernel debuggers. */ 598 const int pcb_size = sizeof(struct pcb); 599 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 600 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 601 602 /* XXX compatibility, remove for 6.0 */ 603 #include <sys/imgact.h> 604 #include <sys/imgact_elf.h> 605 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 606 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 607 "compatibility for kern.fallback_elf_brand"); 608