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