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