1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* sysconf(3C) - returns system configuration information */ 33 34 #pragma weak _sysconf = sysconf 35 36 #include "lint.h" 37 #include <mtlib.h> 38 #include <sys/types.h> 39 #include <unistd.h> 40 #include <sys/sysconfig.h> 41 #include <limits.h> 42 #include <time.h> 43 #include <errno.h> 44 #include <nss_dbdefs.h> 45 #include <thread.h> 46 #include <xti.h> 47 #include "libc.h" 48 #include "xpg6.h" 49 50 /* from nss_common.c */ 51 extern size_t _nss_get_bufsizes(int); 52 53 long 54 sysconf(int name) 55 { 56 static int _pagesize = 0; 57 static int _hz = 0; 58 static pid_t _maxpid = 0; 59 static int _stackprot = 0; 60 extern int __xpg4; 61 62 switch (name) { 63 default: 64 errno = EINVAL; 65 return (-1L); 66 67 case _SC_ARG_MAX: 68 return ((long)ARG_MAX); 69 70 case _SC_CLK_TCK: 71 if (_hz <= 0) 72 _hz = _sysconfig(_CONFIG_CLK_TCK); 73 return (_hz); 74 75 case _SC_JOB_CONTROL: 76 return ((long)_POSIX_JOB_CONTROL); 77 78 case _SC_SAVED_IDS: 79 return ((long)_POSIX_SAVED_IDS); 80 81 case _SC_CHILD_MAX: 82 return (_sysconfig(_CONFIG_CHILD_MAX)); 83 84 case _SC_NGROUPS_MAX: 85 return (_sysconfig(_CONFIG_NGROUPS)); 86 87 case _SC_OPEN_MAX: 88 return (_sysconfig(_CONFIG_OPEN_FILES)); 89 90 case _SC_VERSION: 91 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 92 return (200112L); 93 else 94 return (199506L); 95 96 case _SC_PAGESIZE: 97 if (_pagesize <= 0) 98 _pagesize = _sysconfig(_CONFIG_PAGESIZE); 99 return (_pagesize); 100 101 case _SC_XOPEN_VERSION: 102 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 103 return (600L); 104 else if (__xpg4 == 0) 105 return (_sysconfig(_CONFIG_XOPEN_VER)); 106 else 107 return (4L); 108 109 case _SC_XOPEN_XCU_VERSION: 110 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 111 return (600L); 112 else 113 return (4L); 114 115 /* 116 * old value for pre XPG5 conformant systems to match 117 * getpass() length. 118 * XPG5 special cased with __sysconf_xpg5() 119 * new value for default and modern XPG systems. 120 */ 121 case _SC_PASS_MAX: 122 if ((__xpg4 == 1) && 123 (!(__xpg6 & _C99SUSv3_XPG6_sysconf_version))) 124 return ((long)_PASS_MAX_XPG); 125 else 126 return ((long)_PASS_MAX); 127 128 case _SC_LOGNAME_MAX: 129 return ((long)LOGNAME_MAX); 130 131 case _SC_STREAM_MAX: 132 return (_sysconfig(_CONFIG_OPEN_FILES)); 133 134 case _SC_TZNAME_MAX: 135 return (-1L); 136 137 case _SC_NPROCESSORS_CONF: 138 return (_sysconfig(_CONFIG_NPROC_CONF)); 139 140 case _SC_NPROCESSORS_ONLN: 141 return (_sysconfig(_CONFIG_NPROC_ONLN)); 142 143 case _SC_NPROCESSORS_MAX: 144 return (_sysconfig(_CONFIG_NPROC_MAX)); 145 146 case _SC_STACK_PROT: 147 if (_stackprot == 0) 148 _stackprot = _sysconfig(_CONFIG_STACK_PROT); 149 return (_stackprot); 150 151 /* POSIX.4 names */ 152 153 /* 154 * Each of the following also have _POSIX_* symbols 155 * defined in <unistd.h>. Values here should align 156 * with values in the header. Up until the SUSv3 standard 157 * we defined these simply as 1. With the introduction 158 * of the new revision, these were changed to 200112L. 159 * The standard allows us to change the value, however, 160 * we have kept both values in case application programs 161 * are relying on the previous value even though an 162 * application doing so is technically wrong. 163 */ 164 case _SC_ASYNCHRONOUS_IO: 165 case _SC_FSYNC: 166 case _SC_MAPPED_FILES: 167 case _SC_MEMLOCK: 168 case _SC_MEMLOCK_RANGE: 169 case _SC_MEMORY_PROTECTION: 170 case _SC_MESSAGE_PASSING: 171 case _SC_PRIORITY_SCHEDULING: 172 case _SC_REALTIME_SIGNALS: 173 case _SC_SEMAPHORES: 174 case _SC_SHARED_MEMORY_OBJECTS: 175 case _SC_SYNCHRONIZED_IO: 176 case _SC_TIMERS: 177 if (__xpg6 & _C99SUSv3_mode_ON) 178 return (200112L); 179 else 180 return (1L); 181 182 case _SC_PRIORITIZED_IO: 183 #ifdef _POSIX_PRIORITIZED_IO 184 return (1L); 185 #else 186 return (-1L); 187 #endif 188 189 case _SC_AIO_LISTIO_MAX: 190 return (_sysconfig(_CONFIG_AIO_LISTIO_MAX)); 191 192 case _SC_AIO_MAX: 193 return (_sysconfig(_CONFIG_AIO_MAX)); 194 195 case _SC_AIO_PRIO_DELTA_MAX: 196 return (_sysconfig(_CONFIG_AIO_PRIO_DELTA_MAX)); 197 198 case _SC_DELAYTIMER_MAX: 199 return (_sysconfig(_CONFIG_DELAYTIMER_MAX)); 200 201 case _SC_MQ_OPEN_MAX: 202 return (_sysconfig(_CONFIG_MQ_OPEN_MAX)); 203 204 case _SC_MQ_PRIO_MAX: 205 return (_sysconfig(_CONFIG_MQ_PRIO_MAX)); 206 207 case _SC_RTSIG_MAX: 208 return (_sysconfig(_CONFIG_RTSIG_MAX)); 209 210 case _SC_SEM_NSEMS_MAX: 211 return (_sysconfig(_CONFIG_SEM_NSEMS_MAX)); 212 213 case _SC_SEM_VALUE_MAX: 214 return (_sysconfig(_CONFIG_SEM_VALUE_MAX)); 215 216 case _SC_SIGQUEUE_MAX: 217 return (_sysconfig(_CONFIG_SIGQUEUE_MAX)); 218 219 case _SC_SIGRT_MAX: 220 return (_sysconfig(_CONFIG_SIGRT_MAX)); 221 222 case _SC_SIGRT_MIN: 223 return (_sysconfig(_CONFIG_SIGRT_MIN)); 224 225 case _SC_TIMER_MAX: 226 return (_sysconfig(_CONFIG_TIMER_MAX)); 227 228 case _SC_PHYS_PAGES: 229 return (_sysconfig(_CONFIG_PHYS_PAGES)); 230 231 case _SC_AVPHYS_PAGES: 232 return (_sysconfig(_CONFIG_AVPHYS_PAGES)); 233 234 /* XPG4/POSIX.1-1990/POSIX.2-1992 names */ 235 case _SC_2_C_BIND: 236 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 237 return (200112L); 238 else 239 return (1L); 240 241 case _SC_2_CHAR_TERM: 242 return ((long)_POSIX2_CHAR_TERM); 243 244 case _SC_2_C_DEV: 245 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 246 return (200112L); 247 else 248 return (1L); 249 250 case _SC_2_C_VERSION: 251 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 252 return (200112L); 253 else 254 return (199209L); 255 256 case _SC_2_FORT_DEV: 257 return (-1L); 258 259 case _SC_2_FORT_RUN: 260 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 261 return (200112L); 262 else 263 return (1L); 264 265 case _SC_2_LOCALEDEF: 266 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 267 return (200112L); 268 else 269 return (1L); 270 271 case _SC_2_SW_DEV: 272 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 273 return (200112L); 274 else 275 return (1L); 276 277 case _SC_2_UPE: 278 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 279 return (200112L); 280 else 281 return (1L); 282 283 case _SC_2_VERSION: 284 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version) 285 return (200112L); 286 else 287 return (199209L); 288 289 case _SC_BC_BASE_MAX: 290 return ((long)BC_BASE_MAX); 291 292 case _SC_BC_DIM_MAX: 293 return ((long)BC_DIM_MAX); 294 295 case _SC_BC_SCALE_MAX: 296 return ((long)BC_SCALE_MAX); 297 298 case _SC_BC_STRING_MAX: 299 return ((long)BC_STRING_MAX); 300 301 case _SC_COLL_WEIGHTS_MAX: 302 return ((long)COLL_WEIGHTS_MAX); 303 304 case _SC_EXPR_NEST_MAX: 305 return ((long)EXPR_NEST_MAX); 306 307 case _SC_LINE_MAX: 308 return ((long)LINE_MAX); 309 310 case _SC_RE_DUP_MAX: 311 return ((long)RE_DUP_MAX); 312 313 case _SC_XOPEN_CRYPT: 314 return (1L); 315 316 case _SC_XOPEN_ENH_I18N: 317 return ((long)_XOPEN_ENH_I18N); 318 319 case _SC_XOPEN_SHM: 320 return ((long)_XOPEN_SHM); 321 322 /* XPG4v2 (SUS) names */ 323 case _SC_XOPEN_UNIX: 324 return (1L); 325 326 case _SC_XOPEN_LEGACY: 327 return (1L); 328 329 case _SC_ATEXIT_MAX: 330 return (-1L); 331 332 case _SC_IOV_MAX: 333 return ((long)IOV_MAX); 334 335 case _SC_T_IOV_MAX: 336 return ((long)T_IOV_MAX); 337 338 /* XPG5 (SUSv2) names */ 339 case _SC_XOPEN_REALTIME: 340 return (1L); 341 342 case _SC_XOPEN_REALTIME_THREADS: 343 #if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && \ 344 defined(_POSIX_THREAD_PRIO_INHERIT) && \ 345 defined(_POSIX_THREAD_PRIO_PROTECT) 346 return (1L); 347 #else 348 return (-1L); 349 #endif 350 351 case _SC_XBS5_ILP32_OFF32: 352 return (1L); 353 354 case _SC_XBS5_ILP32_OFFBIG: 355 return (1L); 356 357 case _SC_XBS5_LP64_OFF64: 358 return (1L); 359 360 case _SC_XBS5_LPBIG_OFFBIG: 361 return (1L); 362 363 /* POSIX.1c names */ 364 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 365 return (-1L); 366 367 case _SC_GETGR_R_SIZE_MAX: 368 return ((long)_nss_get_bufsizes(_SC_GETGR_R_SIZE_MAX)); 369 370 case _SC_GETPW_R_SIZE_MAX: 371 return ((long)NSS_BUFLEN_PASSWD); 372 373 case _SC_LOGIN_NAME_MAX: 374 return ((long)(LOGNAME_MAX + 1)); 375 376 case _SC_THREAD_KEYS_MAX: 377 return (-1L); 378 379 case _SC_THREAD_STACK_MIN: 380 return ((long)thr_min_stack()); 381 382 case _SC_THREAD_THREADS_MAX: 383 return (-1L); 384 385 case _SC_TTY_NAME_MAX: 386 return ((long)TTYNAME_MAX); 387 388 case _SC_BARRIERS: 389 return ((long)_POSIX_BARRIERS); 390 391 case _SC_CLOCK_SELECTION: 392 return ((long)_POSIX_CLOCK_SELECTION); 393 394 case _SC_MONOTONIC_CLOCK: 395 return ((long)_POSIX_MONOTONIC_CLOCK); 396 397 case _SC_SPAWN: 398 return ((long)_POSIX_SPAWN); 399 400 case _SC_SPIN_LOCKS: 401 return ((long)_POSIX_SPIN_LOCKS); 402 403 case _SC_THREADS: 404 case _SC_THREAD_ATTR_STACKADDR: 405 case _SC_THREAD_ATTR_STACKSIZE: 406 case _SC_THREAD_PRIORITY_SCHEDULING: 407 case _SC_THREAD_PRIO_INHERIT: 408 case _SC_THREAD_PRIO_PROTECT: 409 case _SC_THREAD_PROCESS_SHARED: 410 case _SC_THREAD_SAFE_FUNCTIONS: 411 if (__xpg6 & _C99SUSv3_mode_ON) 412 return (200112L); 413 else 414 return (1L); 415 416 case _SC_TIMEOUTS: 417 return ((long)_POSIX_TIMEOUTS); 418 419 /* 1216676 - cache info */ 420 case _SC_COHER_BLKSZ: 421 return (_sysconfig(_CONFIG_COHERENCY)); 422 423 case _SC_SPLIT_CACHE: 424 return (_sysconfig(_CONFIG_SPLIT_CACHE)); 425 426 case _SC_ICACHE_SZ: 427 return (_sysconfig(_CONFIG_ICACHESZ)); 428 429 case _SC_DCACHE_SZ: 430 return (_sysconfig(_CONFIG_DCACHESZ)); 431 432 case _SC_ICACHE_LINESZ: 433 return (_sysconfig(_CONFIG_ICACHELINESZ)); 434 435 case _SC_DCACHE_LINESZ: 436 return (_sysconfig(_CONFIG_DCACHELINESZ)); 437 438 case _SC_ICACHE_BLKSZ: 439 return (_sysconfig(_CONFIG_ICACHEBLKSZ)); 440 441 case _SC_DCACHE_BLKSZ: 442 return (_sysconfig(_CONFIG_DCACHEBLKSZ)); 443 444 case _SC_DCACHE_TBLKSZ: 445 return (_sysconfig(_CONFIG_DCACHETBLKSZ)); 446 447 case _SC_ICACHE_ASSOC: 448 return (_sysconfig(_CONFIG_ICACHE_ASSOC)); 449 450 case _SC_DCACHE_ASSOC: 451 return (_sysconfig(_CONFIG_DCACHE_ASSOC)); 452 453 case _SC_MAXPID: 454 if (_maxpid <= 0) 455 _maxpid = _sysconfig(_CONFIG_MAXPID); 456 return (_maxpid); 457 458 case _SC_CPUID_MAX: 459 return (_sysconfig(_CONFIG_CPUID_MAX)); 460 461 case _SC_EPHID_MAX: 462 return (_sysconfig(_CONFIG_EPHID_MAX)); 463 464 /* UNIX 03 names - XPG6/SUSv3/POSIX.1-2001 */ 465 466 case _SC_REGEXP: 467 return ((long)_POSIX_REGEXP); 468 469 case _SC_SHELL: 470 return ((long)_POSIX_SHELL); 471 472 case _SC_HOST_NAME_MAX: 473 return ((long)_POSIX_HOST_NAME_MAX); 474 475 case _SC_READER_WRITER_LOCKS: 476 return ((long)_POSIX_READER_WRITER_LOCKS); 477 478 case _SC_IPV6: 479 return ((long)_POSIX_IPV6); 480 481 case _SC_RAW_SOCKETS: 482 return ((long)_POSIX_RAW_SOCKETS); 483 484 case _SC_XOPEN_STREAMS: 485 return ((long)_XOPEN_STREAMS); 486 487 case _SC_SYMLOOP_MAX: 488 return (_sysconfig(_CONFIG_SYMLOOP_MAX)); 489 490 case _SC_V6_ILP32_OFF32: 491 return (1L); 492 493 case _SC_V6_ILP32_OFFBIG: 494 return (1L); 495 496 case _SC_V6_LP64_OFF64: 497 return (1L); 498 499 case _SC_V6_LPBIG_OFFBIG: 500 return (1L); 501 502 /* Unsupported UNIX 03 options */ 503 case _SC_2_PBS: 504 case _SC_2_PBS_ACCOUNTING: 505 case _SC_2_PBS_CHECKPOINT: 506 case _SC_2_PBS_LOCATE: 507 case _SC_2_PBS_MESSAGE: 508 case _SC_2_PBS_TRACK: 509 case _SC_ADVISORY_INFO: 510 case _SC_CPUTIME: 511 case _SC_SPORADIC_SERVER: 512 case _SC_SS_REPL_MAX: 513 case _SC_THREAD_CPUTIME: 514 case _SC_THREAD_SPORADIC_SERVER: 515 case _SC_TRACE: 516 case _SC_TRACE_EVENT_FILTER: 517 case _SC_TRACE_EVENT_NAME_MAX: 518 case _SC_TRACE_INHERIT: 519 case _SC_TRACE_LOG: 520 case _SC_TRACE_NAME_MAX: 521 case _SC_TRACE_SYS_MAX: 522 case _SC_TRACE_USER_EVENT_MAX: 523 case _SC_TYPED_MEMORY_OBJECTS: 524 return (-1L); 525 } 526 } 527 528 /* 529 * UNIX 98 version of sysconf needed in order to set _XOPEN_VERSION to 500. 530 */ 531 532 long 533 __sysconf_xpg5(int name) 534 { 535 switch (name) { 536 default: 537 return (sysconf(name)); 538 case _SC_XOPEN_VERSION: 539 return (500L); 540 case _SC_PASS_MAX: 541 return ((long)_PASS_MAX_XPG); 542 } 543 } 544