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/lock.h> 50 #include <sys/mutex.h> 51 #include <sys/proc.h> 52 #include <sys/random.h> 53 #include <sys/sbuf.h> 54 #include <sys/smp.h> 55 #include <sys/sx.h> 56 #include <sys/vmmeter.h> 57 #include <sys/sysctl.h> 58 #include <sys/systm.h> 59 #include <sys/unistd.h> 60 61 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 62 "Sysctl internal magic"); 63 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 64 "High kernel, proc, limits &c"); 65 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 66 "Virtual memory"); 67 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 68 "File system"); 69 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 70 "Network, (see socket.h)"); 71 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 72 "Debugging"); 73 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 74 "Sizeof various things"); 75 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 76 "hardware"); 77 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 78 "machine dependent"); 79 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 80 "user-level"); 81 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 82 "p1003_1b, (see p1003_1b.h)"); 83 84 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 85 "Compatibility code"); 86 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 87 "Security"); 88 #ifdef REGRESSION 89 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 90 "Regression test MIB"); 91 #endif 92 93 #ifdef EXT_RESOURCES 94 SYSCTL_ROOT_NODE(OID_AUTO, clock, CTLFLAG_RW, 0, 95 "Clocks"); 96 #endif 97 98 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 99 kern_ident, 0, "Kernel identifier"); 100 101 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 102 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 103 104 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 105 version, 0, "Kernel version"); 106 107 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 108 compiler_version, 0, "Version of compiler used to compile kernel"); 109 110 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 111 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 112 113 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 114 &maxproc, 0, "Maximum number of processes"); 115 116 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 117 &maxprocperuid, 0, "Maximum processes allowed per userid"); 118 119 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 120 &maxusers, 0, "Hint for kernel tuning"); 121 122 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 123 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 124 125 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 126 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 127 128 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 129 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 130 "Maximum number of supplemental groups a user can belong to"); 131 132 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 133 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 134 135 #ifdef _POSIX_SAVED_IDS 136 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 137 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 138 #else 139 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 140 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 141 #endif 142 143 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 144 145 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 146 kernelname, sizeof kernelname, "Name of kernel file booted"); 147 148 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, 149 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); 150 151 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 152 &mp_ncpus, 0, "Number of active CPUs"); 153 154 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 155 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 156 157 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 158 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 159 160 static int 161 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 162 { 163 char buf[256]; 164 size_t len; 165 166 /*- 167 * This is one of the very few legitimate uses of read_random(9). 168 * Use of arc4random(9) is not recommended as that will ignore 169 * an unsafe (i.e. unseeded) random(4). 170 * 171 * If random(4) is not seeded, then this returns 0, so the 172 * sysctl will return a zero-length buffer. 173 */ 174 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 175 return (SYSCTL_OUT(req, buf, len)); 176 } 177 178 SYSCTL_PROC(_kern, KERN_ARND, arandom, 179 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 180 sysctl_kern_arnd, "", "arc4rand"); 181 182 static int 183 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 184 { 185 u_long val; 186 187 val = ctob(physmem); 188 return (sysctl_handle_long(oidp, &val, 0, req)); 189 } 190 191 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 192 0, 0, sysctl_hw_physmem, "LU", ""); 193 194 static int 195 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 196 { 197 u_long val; 198 val = ctob(realmem); 199 return (sysctl_handle_long(oidp, &val, 0, req)); 200 } 201 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 202 0, 0, sysctl_hw_realmem, "LU", ""); 203 static int 204 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 205 { 206 u_long val; 207 208 val = ctob(physmem - vm_wire_count()); 209 return (sysctl_handle_long(oidp, &val, 0, req)); 210 } 211 212 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 213 0, 0, sysctl_hw_usermem, "LU", ""); 214 215 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); 216 217 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 218 219 static int 220 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 221 { 222 int error; 223 #ifdef SCTL_MASK32 224 int i; 225 uint32_t pagesizes32[MAXPAGESIZES]; 226 227 if (req->flags & SCTL_MASK32) { 228 /* 229 * Recreate the "pagesizes" array with 32-bit elements. Truncate 230 * any page size greater than UINT32_MAX to zero. 231 */ 232 for (i = 0; i < MAXPAGESIZES; i++) 233 pagesizes32[i] = (uint32_t)pagesizes[i]; 234 235 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 236 } else 237 #endif 238 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 239 return (error); 240 } 241 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 242 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 243 244 #ifdef SCTL_MASK32 245 int adaptive_machine_arch = 1; 246 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 247 &adaptive_machine_arch, 1, 248 "Adapt reported machine architecture to the ABI of the binary"); 249 #endif 250 251 static int 252 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 253 { 254 int error; 255 static const char machine_arch[] = MACHINE_ARCH; 256 #ifdef SCTL_MASK32 257 static const char machine_arch32[] = MACHINE_ARCH32; 258 259 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 260 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 261 else 262 #endif 263 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 264 return (error); 265 266 } 267 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 268 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 269 "System architecture"); 270 271 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 272 #ifdef COMPAT_FREEBSD32 273 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 274 #else 275 MACHINE_ARCH, 0, "Supported architectures for binaries"); 276 #endif 277 278 static int 279 sysctl_hostname(SYSCTL_HANDLER_ARGS) 280 { 281 struct prison *pr, *cpr; 282 size_t pr_offset; 283 char tmpname[MAXHOSTNAMELEN]; 284 int descend, error, len; 285 286 /* 287 * This function can set: hostname domainname hostuuid. 288 * Keep that in mind when comments say "hostname". 289 */ 290 pr_offset = (size_t)arg1; 291 len = arg2; 292 KASSERT(len <= sizeof(tmpname), 293 ("length %d too long for %s", len, __func__)); 294 295 pr = req->td->td_ucred->cr_prison; 296 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 297 return (EPERM); 298 /* 299 * Make a local copy of hostname to get/set so we don't have to hold 300 * the jail mutex during the sysctl copyin/copyout activities. 301 */ 302 mtx_lock(&pr->pr_mtx); 303 bcopy((char *)pr + pr_offset, tmpname, len); 304 mtx_unlock(&pr->pr_mtx); 305 306 error = sysctl_handle_string(oidp, tmpname, len, req); 307 308 if (req->newptr != NULL && error == 0) { 309 /* 310 * Copy the locally set hostname to all jails that share 311 * this host info. 312 */ 313 sx_slock(&allprison_lock); 314 while (!(pr->pr_flags & PR_HOST)) 315 pr = pr->pr_parent; 316 mtx_lock(&pr->pr_mtx); 317 bcopy(tmpname, (char *)pr + pr_offset, len); 318 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 319 if (cpr->pr_flags & PR_HOST) 320 descend = 0; 321 else 322 bcopy(tmpname, (char *)cpr + pr_offset, len); 323 mtx_unlock(&pr->pr_mtx); 324 sx_sunlock(&allprison_lock); 325 } 326 return (error); 327 } 328 329 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 330 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 331 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 332 sysctl_hostname, "A", "Hostname"); 333 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 334 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 335 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 336 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 337 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 338 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 339 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 340 sysctl_hostname, "A", "Host UUID"); 341 342 static int regression_securelevel_nonmonotonic = 0; 343 344 #ifdef REGRESSION 345 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 346 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 347 #endif 348 349 static int 350 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 351 { 352 struct prison *pr, *cpr; 353 int descend, error, level; 354 355 pr = req->td->td_ucred->cr_prison; 356 357 /* 358 * Reading the securelevel is easy, since the current jail's level 359 * is known to be at least as secure as any higher levels. Perform 360 * a lockless read since the securelevel is an integer. 361 */ 362 level = pr->pr_securelevel; 363 error = sysctl_handle_int(oidp, &level, 0, req); 364 if (error || !req->newptr) 365 return (error); 366 /* Permit update only if the new securelevel exceeds the old. */ 367 sx_slock(&allprison_lock); 368 mtx_lock(&pr->pr_mtx); 369 if (!regression_securelevel_nonmonotonic && 370 level < pr->pr_securelevel) { 371 mtx_unlock(&pr->pr_mtx); 372 sx_sunlock(&allprison_lock); 373 return (EPERM); 374 } 375 pr->pr_securelevel = level; 376 /* 377 * Set all child jails to be at least this level, but do not lower 378 * them (even if regression_securelevel_nonmonotonic). 379 */ 380 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 381 if (cpr->pr_securelevel < level) 382 cpr->pr_securelevel = level; 383 } 384 mtx_unlock(&pr->pr_mtx); 385 sx_sunlock(&allprison_lock); 386 return (error); 387 } 388 389 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 390 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 391 "I", "Current secure level"); 392 393 #ifdef INCLUDE_CONFIG_FILE 394 /* Actual kernel configuration options. */ 395 extern char kernconfstring[]; 396 397 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 398 kernconfstring, 0, "Kernel configuration file"); 399 #endif 400 401 static int 402 sysctl_hostid(SYSCTL_HANDLER_ARGS) 403 { 404 struct prison *pr, *cpr; 405 u_long tmpid; 406 int descend, error; 407 408 /* 409 * Like sysctl_hostname, except it operates on a u_long 410 * instead of a string, and is used only for hostid. 411 */ 412 pr = req->td->td_ucred->cr_prison; 413 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 414 return (EPERM); 415 tmpid = pr->pr_hostid; 416 error = sysctl_handle_long(oidp, &tmpid, 0, req); 417 418 if (req->newptr != NULL && error == 0) { 419 sx_slock(&allprison_lock); 420 while (!(pr->pr_flags & PR_HOST)) 421 pr = pr->pr_parent; 422 mtx_lock(&pr->pr_mtx); 423 pr->pr_hostid = tmpid; 424 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 425 if (cpr->pr_flags & PR_HOST) 426 descend = 0; 427 else 428 cpr->pr_hostid = tmpid; 429 mtx_unlock(&pr->pr_mtx); 430 sx_sunlock(&allprison_lock); 431 } 432 return (error); 433 } 434 435 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 436 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 437 NULL, 0, sysctl_hostid, "LU", "Host ID"); 438 439 /* 440 * The osrelease string is copied from the global (osrelease in vers.c) into 441 * prison0 by a sysinit and is inherited by child jails if not changed at jail 442 * creation, so we always return the copy from the current prison data. 443 */ 444 static int 445 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 446 { 447 struct prison *pr; 448 449 pr = req->td->td_ucred->cr_prison; 450 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 451 452 } 453 454 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 455 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 456 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 457 458 /* 459 * The osreldate number is copied from the global (osreldate in vers.c) into 460 * prison0 by a sysinit and is inherited by child jails if not changed at jail 461 * creation, so we always return the value from the current prison data. 462 */ 463 static int 464 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 465 { 466 struct prison *pr; 467 468 pr = req->td->td_ucred->cr_prison; 469 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 470 471 } 472 473 /* 474 * NOTICE: The *userland* release date is available in 475 * /usr/include/osreldate.h 476 */ 477 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 478 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 479 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 480 481 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 482 483 #ifdef COMPAT_FREEBSD4 484 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 485 #endif 486 487 #ifdef COMPAT_FREEBSD5 488 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 489 #endif 490 491 #ifdef COMPAT_FREEBSD6 492 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 493 #endif 494 495 #ifdef COMPAT_FREEBSD7 496 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 497 #endif 498 499 /* 500 * This is really cheating. These actually live in the libc, something 501 * which I'm not quite sure is a good idea anyway, but in order for 502 * getnext and friends to actually work, we define dummies here. 503 * 504 * XXXRW: These probably should be CTLFLAG_CAPRD. 505 */ 506 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 507 "", 0, "PATH that finds all the standard utilities"); 508 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 509 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 510 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 511 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 512 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 513 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 514 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 515 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 516 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 517 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 518 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 519 SYSCTL_NULL_INT_PTR, 0, ""); 520 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 521 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 522 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 524 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, 526 "The version of POSIX 1003.2 with which the system attempts to comply"); 527 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 528 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 529 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 530 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 531 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 532 SYSCTL_NULL_INT_PTR, 0, ""); 533 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 534 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 535 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 536 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 537 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 538 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 539 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 540 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 541 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 542 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 543 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 544 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 545 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 546 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 547 548 #include <sys/vnode.h> 549 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 550 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 551 552 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 553 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 554 555 static int 556 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 557 { 558 int error, pm; 559 560 pm = pid_max; 561 error = sysctl_handle_int(oidp, &pm, 0, req); 562 if (error || !req->newptr) 563 return (error); 564 sx_xlock(&proctree_lock); 565 sx_xlock(&allproc_lock); 566 567 /* 568 * Only permit the values less then PID_MAX. 569 * As a safety measure, do not allow to limit the pid_max too much. 570 */ 571 if (pm < 300 || pm > PID_MAX) 572 error = EINVAL; 573 else 574 pid_max = pm; 575 sx_xunlock(&allproc_lock); 576 sx_xunlock(&proctree_lock); 577 return (error); 578 } 579 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 580 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 581 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 582 583 #include <sys/bio.h> 584 #include <sys/buf.h> 585 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 586 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 587 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 588 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 589 590 #include <sys/user.h> 591 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 592 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 593 594 /* Used by kernel debuggers. */ 595 const int pcb_size = sizeof(struct pcb); 596 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 597 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 598 599 /* XXX compatibility, remove for 6.0 */ 600 #include <sys/imgact.h> 601 #include <sys/imgact_elf.h> 602 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 603 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 604 "compatibility for kern.fallback_elf_brand"); 605