sysdeps/posix/sysconf.c

   1 /* Copyright (C) 1991,93,1995-1997,1999-2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <limits.h>
  21 #include <grp.h>
  22 #include <pwd.h>
  23 #include <stddef.h>
  24 #include <stdio.h>
  25 #include <time.h>
  26 #include <unistd.h>
  27 #include <sys/param.h>
  28 #include <sys/sysinfo.h>
  29 #include <sys/types.h>
  30 #include <regex.h>
  31
  32
  33 /* Get the value of the system variable NAME.  */
  34 long int
  35 __sysconf (name)
  36      int name;
  37 {
  38   switch (name)
  39     {
  40     default:
  41       __set_errno (EINVAL);
  42       return -1;
  43
  44     case _SC_ARG_MAX:
  45 #ifdef  ARG_MAX
  46       return ARG_MAX;
  47 #else
  48       return -1;
  49 #endif
  50
  51     case _SC_CHILD_MAX:
  52 #ifdef  CHILD_MAX
  53       return CHILD_MAX;
  54 #else
  55       return -1;
  56 #endif
  57
  58     case _SC_CLK_TCK:
  59       return __getclktck ();
  60
  61     case _SC_NGROUPS_MAX:
  62 #ifdef  NGROUPS_MAX
  63       return NGROUPS_MAX;
  64 #else
  65       return -1;
  66 #endif
  67
  68     case _SC_OPEN_MAX:
  69       return __getdtablesize ();
  70
  71     case _SC_STREAM_MAX:
  72 #ifdef  STREAM_MAX
  73       return STREAM_MAX;
  74 #else
  75       return FOPEN_MAX;
  76 #endif
  77
  78     case _SC_TZNAME_MAX:
  79       return MAX (__tzname_max (), _POSIX_TZNAME_MAX);
  80
  81     case _SC_JOB_CONTROL:
  82 #ifdef  _POSIX_JOB_CONTROL
  83       return 1;
  84 #else
  85       return -1;
  86 #endif
  87
  88     case _SC_SAVED_IDS:
  89 #ifdef  _POSIX_SAVED_IDS
  90       return 1;
  91 #else
  92       return -1;
  93 #endif
  94
  95     case _SC_REALTIME_SIGNALS:
  96 #ifdef  _POSIX_REALTIME_SIGNALS
  97       return 1;
  98 #else
  99       return -1;
 100 #endif
 101
 102     case _SC_PRIORITY_SCHEDULING:
 103 #ifdef  _POSIX_PRIORITY_SCHEDULING
 104       return 1;
 105 #else
 106       return -1;
 107 #endif
 108
 109     case _SC_TIMERS:
 110 #ifdef  _POSIX_TIMERS
 111       return 1;
 112 #else
 113       return -1;
 114 #endif
 115
 116     case _SC_ASYNCHRONOUS_IO:
 117 #ifdef  _POSIX_ASYNCHRONOUS_IO
 118       return 1;
 119 #else
 120       return -1;
 121 #endif
 122
 123     case _SC_PRIORITIZED_IO:
 124 #ifdef  _POSIX_PRIORITIZED_IO
 125       return 1;
 126 #else
 127       return -1;
 128 #endif
 129
 130     case _SC_SYNCHRONIZED_IO:
 131 #ifdef  _POSIX_SYNCHRONIZED_IO
 132       return 1;
 133 #else
 134       return -1;
 135 #endif
 136
 137     case _SC_FSYNC:
 138 #ifdef  _POSIX_FSYNC
 139       return 1;
 140 #else
 141       return -1;
 142 #endif
 143
 144     case _SC_MAPPED_FILES:
 145 #ifdef  _POSIX_MAPPED_FILES
 146       return 1;
 147 #else
 148       return -1;
 149 #endif
 150
 151     case _SC_MEMLOCK:
 152 #ifdef  _POSIX_MEMLOCK
 153       return 1;
 154 #else
 155       return -1;
 156 #endif
 157
 158     case _SC_MEMLOCK_RANGE:
 159 #ifdef  _POSIX_MEMLOCK_RANGE
 160       return 1;
 161 #else
 162       return -1;
 163 #endif
 164
 165     case _SC_MEMORY_PROTECTION:
 166 #ifdef  _POSIX_MEMORY_PROTECTION
 167       return 1;
 168 #else
 169       return -1;
 170 #endif
 171
 172     case _SC_MESSAGE_PASSING:
 173 #ifdef  _POSIX_MESSAGE_PASSING
 174       return 1;
 175 #else
 176       return -1;
 177 #endif
 178
 179     case _SC_SEMAPHORES:
 180 #ifdef  _POSIX_SEMAPHORES
 181       return 1;
 182 #else
 183       return -1;
 184 #endif
 185
 186     case _SC_SHARED_MEMORY_OBJECTS:
 187 #ifdef  _POSIX_SHARED_MEMORY_OBJECTS
 188       return 1;
 189 #else
 190       return -1;
 191 #endif
 192
 193     case _SC_VERSION:
 194       return _POSIX_VERSION;
 195
 196     case _SC_PAGESIZE:
 197       return __getpagesize ();
 198
 199     case _SC_AIO_LISTIO_MAX:
 200 #ifdef  AIO_LISTIO_MAX
 201       return AIO_LISTIO_MAX;
 202 #else
 203       return -1;
 204 #endif
 205
 206     case _SC_AIO_MAX:
 207 #ifdef  AIO_MAX
 208       return AIO_MAX;
 209 #else
 210       return -1;
 211 #endif
 212
 213     case _SC_AIO_PRIO_DELTA_MAX:
 214 #ifdef  AIO_PRIO_DELTA_MAX
 215       return AIO_PRIO_DELTA_MAX;
 216 #else
 217       return -1;
 218 #endif
 219
 220     case _SC_DELAYTIMER_MAX:
 221 #ifdef  DELAYTIMER_MAX
 222       return DELAYTIMER_MAX;
 223 #else
 224       return -1;
 225 #endif
 226
 227     case _SC_MQ_OPEN_MAX:
 228 #ifdef  MQ_OPEN_MAX
 229       return MQ_OPEN_MAX;
 230 #else
 231       return -1;
 232 #endif
 233
 234     case _SC_MQ_PRIO_MAX:
 235 #ifdef  MQ_PRIO_MAX
 236       return MQ_PRIO_MAX;
 237 #else
 238       return -1;
 239 #endif
 240
 241     case _SC_RTSIG_MAX:
 242 #ifdef  RTSIG_MAX
 243       return RTSIG_MAX;
 244 #else
 245       return -1;
 246 #endif
 247
 248     case _SC_SEM_NSEMS_MAX:
 249 #ifdef  SEM_NSEMS_MAX
 250       return SEM_NSEMS_MAX;
 251 #else
 252       return -1;
 253 #endif
 254
 255     case _SC_SEM_VALUE_MAX:
 256 #ifdef  SEM_VALUE_MAX
 257       return SEM_VALUE_MAX;
 258 #else
 259       return -1;
 260 #endif
 261
 262     case _SC_SIGQUEUE_MAX:
 263 #ifdef  SIGQUEUE_MAX
 264       return SIGQUEUE_MAX;
 265 #else
 266       return -1;
 267 #endif
 268
 269     case _SC_TIMER_MAX:
 270 #ifdef  TIMER_MAX
 271       return TIMER_MAX;
 272 #else
 273       return -1;
 274 #endif
 275
 276     case _SC_BC_BASE_MAX:
 277 #ifdef  BC_BASE_MAX
 278       return BC_BASE_MAX;
 279 #else
 280       return -1;
 281 #endif
 282
 283     case _SC_BC_DIM_MAX:
 284 #ifdef  BC_DIM_MAX
 285       return BC_DIM_MAX;
 286 #else
 287       return -1;
 288 #endif
 289
 290     case _SC_BC_SCALE_MAX:
 291 #ifdef  BC_SCALE_MAX
 292       return BC_SCALE_MAX;
 293 #else
 294       return -1;
 295 #endif
 296
 297     case _SC_BC_STRING_MAX:
 298 #ifdef  BC_STRING_MAX
 299       return BC_STRING_MAX;
 300 #else
 301       return -1;
 302 #endif
 303
 304     case _SC_COLL_WEIGHTS_MAX:
 305 #ifdef  COLL_WEIGHTS_MAX
 306       return COLL_WEIGHTS_MAX;
 307 #else
 308       return -1;
 309 #endif
 310
 311     case _SC_EXPR_NEST_MAX:
 312 #ifdef  EXPR_NEST_MAX
 313       return EXPR_NEST_MAX;
 314 #else
 315       return -1;
 316 #endif
 317
 318     case _SC_LINE_MAX:
 319 #ifdef  LINE_MAX
 320       return LINE_MAX;
 321 #else
 322       return -1;
 323 #endif
 324
 325     case _SC_RE_DUP_MAX:
 326 #ifdef  RE_DUP_MAX
 327       return RE_DUP_MAX;
 328 #else
 329       return -1;
 330 #endif
 331
 332     case _SC_CHARCLASS_NAME_MAX:
 333 #ifdef  CHARCLASS_NAME_MAX
 334       return CHARCLASS_NAME_MAX;
 335 #else
 336       return -1;
 337 #endif
 338
 339     case _SC_PII:
 340 #ifdef  _POSIX_PII
 341       return 1;
 342 #else
 343       return -1;
 344 #endif
 345
 346     case _SC_PII_XTI:
 347 #ifdef  _POSIX_PII_XTI
 348       return 1;
 349 #else
 350       return -1;
 351 #endif
 352
 353     case _SC_PII_SOCKET:
 354 #ifdef  _POSIX_PII_SOCKET
 355       return 1;
 356 #else
 357       return -1;
 358 #endif
 359
 360     case _SC_PII_INTERNET:
 361 #ifdef  _POSIX_PII_INTERNET
 362       return 1;
 363 #else
 364       return -1;
 365 #endif
 366
 367     case _SC_PII_OSI:
 368 #ifdef  _POSIX_PII_OSI
 369       return 1;
 370 #else
 371       return -1;
 372 #endif
 373
 374     case _SC_POLL:
 375 #ifdef  _POSIX_POLL
 376       return 1;
 377 #else
 378       return -1;
 379 #endif
 380
 381     case _SC_SELECT:
 382 #ifdef  _POSIX_SELECT
 383       return 1;
 384 #else
 385       return -1;
 386 #endif
 387
 388     case _SC_UIO_MAXIOV:
 389 #ifdef  UIO_MAXIOV
 390       return UIO_MAXIOV;
 391 #else
 392       return -1;
 393 #endif
 394
 395     case _SC_PII_INTERNET_STREAM:
 396 #ifdef  _POSIX_PII_INTERNET_STREAM
 397       return 1;
 398 #else
 399       return -1;
 400 #endif
 401
 402     case _SC_PII_INTERNET_DGRAM:
 403 #ifdef  _POSIX_PII_INTERNET_DGRAM
 404       return 1;
 405 #else
 406       return -1;
 407 #endif
 408
 409     case _SC_PII_OSI_COTS:
 410 #ifdef  _POSIX_PII_OSI_COTS
 411       return 1;
 412 #else
 413       return -1;
 414 #endif
 415
 416     case _SC_PII_OSI_CLTS:
 417 #ifdef  _POSIX_PII_OSI_CLTS
 418       return 1;
 419 #else
 420       return -1;
 421 #endif
 422
 423     case _SC_PII_OSI_M:
 424 #ifdef  _POSIX_PII_OSI_M
 425       return 1;
 426 #else
 427       return -1;
 428 #endif
 429
 430     case _SC_T_IOV_MAX:
 431 #ifdef  _T_IOV_MAX
 432       return _T_IOV_MAX;
 433 #else
 434       return -1;
 435 #endif
 436
 437     case _SC_2_VERSION:
 438       return _POSIX2_VERSION;
 439
 440     case _SC_2_C_BIND:
 441 #ifdef  _POSIX2_C_BIND
 442       return _POSIX2_C_BIND;
 443 #else
 444       return -1;
 445 #endif
 446
 447     case _SC_2_C_DEV:
 448 #ifdef  _POSIX2_C_DEV
 449       return _POSIX2_C_DEV;
 450 #else
 451       return -1;
 452 #endif
 453
 454     case _SC_2_C_VERSION:
 455 #ifdef  _POSIX2_C_VERSION
 456       return _POSIX2_C_VERSION;
 457 #else
 458       return -1;
 459 #endif
 460
 461     case _SC_2_FORT_DEV:
 462 #ifdef  _POSIX2_FORT_DEV
 463       return _POSIX2_FORT_DEV;
 464 #else
 465       return -1;
 466 #endif
 467
 468     case _SC_2_LOCALEDEF:
 469 #ifdef  _POSIX2_LOCALEDEF
 470       return _POSIX2_LOCALEDEF;
 471 #else
 472       return -1;
 473 #endif
 474
 475     case _SC_2_SW_DEV:
 476 #ifdef  _POSIX2_SW_DEV
 477       return _POSIX2_SW_DEV;
 478 #else
 479       return -1;
 480 #endif
 481
 482     case _SC_2_CHAR_TERM:
 483 #ifdef  _POSIX2_CHAR_TERM
 484       return _POSIX2_CHAR_TERM;
 485 #else
 486       return -1;
 487 #endif
 488
 489     case _SC_2_UPE:
 490 #ifdef  _POSIX2_UPE
 491       return _POSIX2_UPE;
 492 #else
 493       return -1;
 494 #endif
 495
 496       /* POSIX 1003.1c (POSIX Threads).  */
 497     case _SC_THREADS:
 498 #ifdef  _POSIX_THREADS
 499       return 1;
 500 #else
 501       return -1;
 502 #endif
 503
 504     case _SC_THREAD_SAFE_FUNCTIONS:
 505 #ifdef  _POSIX_THREAD_SAFE_FUNCTIONS
 506       return 1;
 507 #else
 508       return -1;
 509 #endif
 510
 511     case _SC_GETGR_R_SIZE_MAX:
 512       return NSS_BUFLEN_GROUP;
 513
 514     case _SC_GETPW_R_SIZE_MAX:
 515       return NSS_BUFLEN_PASSWD;
 516
 517     case _SC_LOGIN_NAME_MAX:
 518 #ifdef  LOGIN_NAME_MAX
 519       return LOGIN_NAME_MAX;
 520 #else
 521       return -1;
 522 #endif
 523
 524     case _SC_TTY_NAME_MAX:
 525 #ifdef  TTY_NAME_MAX
 526       return TTY_NAME_MAX;
 527 #else
 528       return -1;
 529 #endif
 530
 531     case _SC_THREAD_DESTRUCTOR_ITERATIONS:
 532 #ifdef  _POSIX_THREAD_DESTRUCTOR_ITERATIONS
 533       return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
 534 #else
 535       return -1;
 536 #endif
 537
 538     case _SC_THREAD_KEYS_MAX:
 539 #ifdef  PTHREAD_KEYS_MAX
 540       return PTHREAD_KEYS_MAX;
 541 #else
 542       return -1;
 543 #endif
 544
 545     case _SC_THREAD_STACK_MIN:
 546 #ifdef  PTHREAD_STACK_MIN
 547       return PTHREAD_STACK_MIN;
 548 #else
 549       return -1;
 550 #endif
 551
 552     case _SC_THREAD_THREADS_MAX:
 553 #ifdef  PTHREAD_THREADS_MAX
 554       return PTHREAD_THREADS_MAX;
 555 #else
 556       return -1;
 557 #endif
 558
 559     case _SC_THREAD_ATTR_STACKADDR:
 560 #ifdef  _POSIX_THREAD_ATTR_STACKADDR
 561       return 1;
 562 #else
 563       return -1;
 564 #endif
 565
 566     case _SC_THREAD_ATTR_STACKSIZE:
 567 #ifdef  _POSIX_THREAD_ATTR_STACKSIZE
 568       return 1;
 569 #else
 570       return -1;
 571 #endif
 572
 573     case _SC_THREAD_PRIORITY_SCHEDULING:
 574 #ifdef  _POSIX_THREAD_PRIORITY_SCHEDULING
 575       return 1;
 576 #else
 577       return -1;
 578 #endif
 579
 580     case _SC_THREAD_PRIO_INHERIT:
 581 #ifdef  _POSIX_THREAD_PRIO_INHERIT
 582       return 1;
 583 #else
 584       return -1;
 585 #endif
 586
 587     case _SC_THREAD_PRIO_PROTECT:
 588 #ifdef  _POSIX_THREAD_PRIO_PROTECT
 589       return 1;
 590 #else
 591       return -1;
 592 #endif
 593
 594     case _SC_THREAD_PROCESS_SHARED:
 595 #ifdef  _POSIX_THREAD_PROCESS_SHARED
 596       return 1;
 597 #else
 598       return -1;
 599 #endif
 600
 601     case _SC_NPROCESSORS_CONF:
 602       return __get_nprocs_conf ();
 603
 604     case _SC_NPROCESSORS_ONLN:
 605       return __get_nprocs ();
 606
 607     case _SC_PHYS_PAGES:
 608       return __get_phys_pages ();
 609
 610     case _SC_AVPHYS_PAGES:
 611       return __get_avphys_pages ();
 612
 613     case _SC_ATEXIT_MAX:
 614       /* We have no limit since we use lists.  */
 615       return INT_MAX;
 616
 617     case _SC_PASS_MAX:
 618       /* We have no limit but since the return value might be used to
 619          allocate a buffer we restrict the value.  */
 620       return BUFSIZ;
 621
 622     case _SC_XOPEN_VERSION:
 623       return _XOPEN_VERSION;
 624
 625     case _SC_XOPEN_XCU_VERSION:
 626       return _XOPEN_XCU_VERSION;
 627
 628     case _SC_XOPEN_UNIX:
 629       return _XOPEN_UNIX;
 630
 631     case _SC_XOPEN_CRYPT:
 632 #ifdef  _XOPEN_CRYPT
 633       return _XOPEN_CRYPT;
 634 #else
 635       return -1;
 636 #endif
 637
 638     case _SC_XOPEN_ENH_I18N:
 639 #ifdef  _XOPEN_ENH_I18N
 640       return _XOPEN_ENH_I18N;
 641 #else
 642       return -1;
 643 #endif
 644
 645     case _SC_XOPEN_SHM:
 646 #ifdef  _XOPEN_SHM
 647       return _XOPEN_SHM;
 648 #else
 649       return -1;
 650 #endif
 651
 652     case _SC_XOPEN_XPG2:
 653 #ifdef  _XOPEN_XPG2
 654       return _XOPEN_XPG2;
 655 #else
 656       return -1;
 657 #endif
 658
 659     case _SC_XOPEN_XPG3:
 660 #ifdef  _XOPEN_XPG3
 661       return _XOPEN_XPG3;
 662 #else
 663       return -1;
 664 #endif
 665
 666     case _SC_XOPEN_XPG4:
 667 #ifdef  _XOPEN_XPG4
 668       return _XOPEN_XPG4;
 669 #else
 670       return -1;
 671 #endif
 672
 673     case _SC_CHAR_BIT:
 674       return CHAR_BIT;
 675
 676     case _SC_CHAR_MAX:
 677       return CHAR_MAX;
 678
 679     case _SC_CHAR_MIN:
 680       return CHAR_MIN;
 681
 682     case _SC_INT_MAX:
 683       return INT_MAX;
 684
 685     case _SC_INT_MIN:
 686       return INT_MIN;
 687
 688     case _SC_LONG_BIT:
 689       return sizeof (long int) * CHAR_BIT;
 690
 691     case _SC_WORD_BIT:
 692       return sizeof (int) * CHAR_BIT;
 693
 694     case _SC_MB_LEN_MAX:
 695       return MB_LEN_MAX;
 696
 697     case _SC_NZERO:
 698       return NZERO;
 699
 700     case _SC_SSIZE_MAX:
 701       return _POSIX_SSIZE_MAX;
 702
 703     case _SC_SCHAR_MAX:
 704       return SCHAR_MAX;
 705
 706     case _SC_SCHAR_MIN:
 707       return SCHAR_MIN;
 708
 709     case _SC_SHRT_MAX:
 710       return SHRT_MAX;
 711
 712     case _SC_SHRT_MIN:
 713       return SHRT_MIN;
 714
 715     case _SC_UCHAR_MAX:
 716       return UCHAR_MAX;
 717
 718     case _SC_UINT_MAX:
 719       return UINT_MAX;
 720
 721     case _SC_ULONG_MAX:
 722       return ULONG_MAX;
 723
 724     case _SC_USHRT_MAX:
 725       return USHRT_MAX;
 726
 727     case _SC_NL_ARGMAX:
 728 #ifdef  NL_ARGMAX
 729       return NL_ARGMAX;
 730 #else
 731       return -1;
 732 #endif
 733
 734     case _SC_NL_LANGMAX:
 735 #ifdef  NL_LANGMAX
 736       return NL_LANGMAX;
 737 #else
 738       return -1;
 739 #endif
 740
 741     case _SC_NL_MSGMAX:
 742 #ifdef  NL_MSGMAX
 743       return NL_MSGMAX;
 744 #else
 745       return -1;
 746 #endif
 747
 748     case _SC_NL_NMAX:
 749 #ifdef  NL_NMAX
 750       return NL_NMAX;
 751 #else
 752       return -1;
 753 #endif
 754
 755     case _SC_NL_SETMAX:
 756 #ifdef  NL_SETMAX
 757       return NL_SETMAX;
 758 #else
 759       return -1;
 760 #endif
 761
 762     case _SC_NL_TEXTMAX:
 763 #ifdef  NL_TEXTMAX
 764       return NL_TEXTMAX;
 765 #else
 766       return -1;
 767 #endif
 768
 769     case _SC_XBS5_ILP32_OFF32:
 770 #ifdef _XBS5_ILP32_OFF32
 771       return _XBS5_ILP32_OFF32;
 772 #else
 773       return -1;
 774 #endif
 775     case _SC_XBS5_ILP32_OFFBIG:
 776 #ifdef _XBS5_ILP32_OFFBIG
 777       return _XBS5_ILP32_OFFBIG;
 778 #else
 779       return -1;
 780 #endif
 781     case _SC_XBS5_LP64_OFF64:
 782 #ifdef _XBS5_LP64_OFF64
 783       return _XBS5_LP64_OFF64;
 784 #else
 785       return -1;
 786 #endif
 787     case _SC_XBS5_LPBIG_OFFBIG:
 788 #ifdef _XBS5_LPBIG_OFFBIG
 789       return _XBS5_LPBIG_OFFBIG;
 790 #else
 791       return -1;
 792 #endif
 793
 794     case _SC_V6_ILP32_OFF32:
 795 #ifdef _POSIX_V6_ILP32_OFF32
 796       return _POSIX_V6_ILP32_OFF32;
 797 #else
 798       return -1;
 799 #endif
 800     case _SC_V6_ILP32_OFFBIG:
 801 #ifdef _POSIX_V6_ILP32_OFFBIG
 802       return _POSIX_V6_ILP32_OFFBIG;
 803 #else
 804       return -1;
 805 #endif
 806     case _SC_V6_LP64_OFF64:
 807 #ifdef _POSIX_V6_LP64_OFF64
 808       return _POSIX_V6_LP64_OFF64;
 809 #else
 810       return -1;
 811 #endif
 812     case _SC_V6_LPBIG_OFFBIG:
 813 #ifdef _POSIX_V6_LPBIG_OFFBIG
 814       return _POSIX_V6_LPBIG_OFFBIG;
 815 #else
 816       return -1;
 817 #endif
 818
 819     case _SC_XOPEN_LEGACY:
 820       return _XOPEN_LEGACY;
 821
 822     case _SC_XOPEN_REALTIME:
 823 #ifdef _XOPEN_REALTIME
 824       return _XOPEN_REALTIME;
 825 #else
 826       return -1;
 827 #endif
 828     case _SC_XOPEN_REALTIME_THREADS:
 829 #ifdef _XOPEN_REALTIME_THREADS
 830       return _XOPEN_REALTIME_THREADS;
 831 #else
 832       return -1;
 833 #endif
 834
 835     case _SC_ADVISORY_INFO:
 836 #ifdef _POSIX_ADVISORY_INFO
 837       return _POSIX_ADVISORY_INFO;
 838 #else
 839       return -1;
 840 #endif
 841
 842     case _SC_BARRIERS:
 843 #ifdef _POSIX_BARRIERS
 844       return _POSIX_BARRIERS;
 845 #else
 846       return -1;
 847 #endif
 848
 849     case _SC_BASE:
 850 #ifdef _POSIX_BASE
 851       return _POSIX_BASE;
 852 #else
 853       return -1;
 854 #endif
 855     case _SC_C_LANG_SUPPORT:
 856 #ifdef _POSIX_C_LANG_SUPPORT
 857       return _POSIX_C_LANG_SUPPORT;
 858 #else
 859       return -1;
 860 #endif
 861     case _SC_C_LANG_SUPPORT_R:
 862 #ifdef _POSIX_C_LANG_SUPPORT_R
 863       return _POSIX_C_LANG_SUPPORT_R;
 864 #else
 865       return -1;
 866 #endif
 867
 868     case _SC_CLOCK_SELECTION:
 869 #ifdef _POSIX_CLOCK_SELECTION
 870       return _POSIX_CLOCK_SELECTION;
 871 #else
 872       return -1;
 873 #endif
 874
 875     case _SC_CPUTIME:
 876 #ifdef _POSIX_CPUTIME
 877       return _POSIX_CPUTIME;
 878 #else
 879       return -1;
 880 #endif
 881
 882     case _SC_DEVICE_IO:
 883 #ifdef _POSIX_DEVICE_IO
 884       return _POSIX_DEVICE_IO;
 885 #else
 886       return -1;
 887 #endif
 888     case _SC_DEVICE_SPECIFIC:
 889 #ifdef _POSIX_DEVICE_SPCIFIC
 890       return _POSIX_DEVICE_SPECIFIC;
 891 #else
 892       return -1;
 893 #endif
 894     case _SC_DEVICE_SPECIFIC_R:
 895 #ifdef _POSIX_DEVICE_SPCIFIC_R
 896       return _POSIX_DEVICE_SPECIFIC_R;
 897 #else
 898       return -1;
 899 #endif
 900
 901     case _SC_FD_MGMT:
 902 #ifdef _POSIX_FD_MGMT
 903       return _POSIX_FD_MGMT;
 904 #else
 905       return -1;
 906 #endif
 907
 908     case _SC_FIFO:
 909 #ifdef _POSIX_FIFO
 910       return _POSIX_FIFO;
 911 #else
 912       return -1;
 913 #endif
 914     case _SC_PIPE:
 915 #ifdef _POSIX_PIPE
 916       return _POSIX_PIPE;
 917 #else
 918       return -1;
 919 #endif
 920
 921     case _SC_FILE_ATTRIBUTES:
 922 #ifdef _POSIX_FILE_ATTRIBUTES
 923       return _POSIX_FILE_ATTRIBUTES;
 924 #else
 925       return -1;
 926 #endif
 927     case _SC_FILE_LOCKING:
 928 #ifdef _POSIX_FILE_LOCKING
 929       return _POSIX_FILE_LOCKING;
 930 #else
 931       return -1;
 932 #endif
 933     case _SC_FILE_SYSTEM:
 934 #ifdef _POSIX_FILE_SYSTEM
 935       return _POSIX_FILE_SYSTEM;
 936 #else
 937       return -1;
 938 #endif
 939
 940     case _SC_MONOTONIC_CLOCK:
 941 #if _POSIX_MONOTONIC_CLOCK
 942       return _POSIX_MONOTONIC_CLOCK;
 943 #else
 944       return -1;
 945 #endif
 946
 947     case _SC_MULTI_PROCESS:
 948 #ifdef _POSIX_MULTI_PROCESS
 949       return _POSIX_MULTI_PROCESS;
 950 #else
 951       return -1;
 952 #endif
 953     case _SC_SINGLE_PROCESS:
 954 #ifdef _POSIX_SINGLE_PROCESS
 955       return _POSIX_SINGLE_PROCESS;
 956 #else
 957       return -1;
 958 #endif
 959
 960     case _SC_NETWORKING:
 961 #ifdef _POSIX_NETWORKING
 962       return _POSIX_NETWORKING;
 963 #else
 964       return -1;
 965 #endif
 966
 967     case _SC_READER_WRITER_LOCKS:
 968 #ifdef _POSIX_READER_WRITER_LOCKS
 969       return _POSIX_READER_WRITER_LOCKS;
 970 #else
 971       return -1;
 972 #endif
 973     case _SC_SPIN_LOCKS:
 974 #ifdef _POSIX_SPIN_LOCKS
 975       return _POSIX_SPIN_LOCKS;
 976 #else
 977       return -1;
 978 #endif
 979
 980     case _SC_REGEXP:
 981 #ifdef _POSIX_REGEXP
 982       return _POSIX_REGEXP;
 983 #else
 984       return -1;
 985 #endif
 986     case _SC_REGEX_VERSION:
 987 #ifdef _POSIX_REGEX_VERSION
 988       return _POSIX_REGEX_VERSION;
 989 #else
 990       return -1;
 991 #endif
 992
 993     case _SC_SHELL:
 994 #ifdef _POSIX_SHELL
 995       return _POSIX_SHELL;
 996 #else
 997       return -1;
 998 #endif
 999
1000     case _SC_SIGNALS:
1001 #ifdef _POSUX_SIGNALS
1002       return _POSIX_SIGNALS;
1003 #else
1004       return -1;
1005 #endif
1006
1007     case _SC_SPAWN:
1008 #ifdef _POSIX_SPAWN
1009       return _POSIX_SPAWN;
1010 #else
1011       return -1;
1012 #endif
1013
1014     case _SC_SPORADIC_SERVER:
1015 #ifdef _POSIX_SPORADIC_SERVER
1016       return _POSIX_SPORADIC_SERVER;
1017 #else
1018       return -1;
1019 #endif
1020     case _SC_THREAD_SPORADIC_SERVER:
1021 #ifdef _POSIX_THREAD_SPORADIC_SERVER
1022       return _POSIX_THREAD_SPORADIC_SERVER;
1023 #else
1024       return -1;
1025 #endif
1026
1027     case _SC_SYSTEM_DATABASE:
1028 #ifdef _POSIX_SYSTEM_DATABASE
1029       return _POSIX_SYSTEM_DATABASE;
1030 #else
1031       return -1;
1032 #endif
1033     case _SC_SYSTEM_DATABASE_R:
1034 #ifdef _POSIX_SYSTEM_DATABASE_R
1035       return _POSIX_SYSTEM_DATABASE_R;
1036 #else
1037       return -1;
1038 #endif
1039
1040     case _SC_THREAD_CPUTIME:
1041 #ifdef _POSIX_THREAD_CPUTIME
1042       return _POSIX_THREAD_CPUTIME;
1043 #else
1044       return -1;
1045 #endif
1046
1047     case _SC_TIMEOUTS:
1048 #ifdef _POSIX_TIMEOUTS
1049       return _POSIX_TIMEOUTS;
1050 #else
1051       return -1;
1052 #endif
1053
1054     case _SC_TYPED_MEMORY_OBJECTS:
1055 #ifdef _POSIX_TYPED_MEMORY_OBJECTS
1056       return _POSIX_TYPED_MEMORY_OBJECTS;
1057 #else
1058       return -1;
1059 #endif
1060
1061     case _SC_USER_GROUPS:
1062 #ifdef _POSIX_USER_GROUPS
1063       return _POSIX_USER_GROUPS;
1064 #else
1065       return -1;
1066 #endif
1067     case _SC_USER_GROUPS_R:
1068 #ifdef _POSIX_USER_GROUPS_R
1069       return _POSIX_USER_GROUPS_R;
1070 #else
1071       return -1;
1072 #endif
1073
1074     case _SC_2_PBS:
1075 #ifdef _POSIX2_PBS
1076       return _POSIX2_PBS;
1077 #else
1078       return -1;
1079 #endif
1080     case _SC_2_PBS_ACCOUNTING:
1081 #ifdef _POSIX2_PBS_ACCOUNTING
1082       return _POSIX2_PBS_ACCOUNTING;
1083 #else
1084       return -1;
1085 #endif
1086     case _SC_2_PBS_CHECKPOINT:
1087 #ifdef _POSIX2_PBS_CHECKPOINT
1088       return _POSIX2_PBS_CHECKPOINT;
1089 #else
1090       return -1;
1091 #endif
1092     case _SC_2_PBS_LOCATE:
1093 #ifdef _POSIX2_PBS_LOCATE
1094       return _POSIX2_PBS_LOCATE;
1095 #else
1096       return -1;
1097 #endif
1098     case _SC_2_PBS_TRACK:
1099 #ifdef _POSIX2_PBS_TRACK
1100       return _POSIX2_PBS_TRACK;
1101 #else
1102       return -1;
1103 #endif
1104
1105     case _SC_SYMLOOP_MAX:
1106 #ifdef SYMLOOP_MAX
1107       return SYMLOOP_MAX;
1108 #else
1109       return -1;
1110 #endif
1111
1112     case _SC_STREAMS:
1113 #ifdef _XOPEN_STREAMS
1114       return _XOPEN_STREAMS;
1115 #else
1116       return -1;
1117 #endif
1118     }
1119 }
1120
1121 #undef __sysconf
1122 weak_alias (__sysconf, sysconf)
1123 libc_hidden_def (__sysconf)