1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
|
/* Copyright (C) 1991, 93, 95, 96, 97, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <limits.h>
#include <grp.h>
#include <pwd.h>
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <regex.h>
/* Get the value of the system variable NAME. */
long int sysconf(int name)
{
switch (name)
{
default:
errno=EINVAL;
return -1;
case _SC_ARG_MAX:
#ifdef ARG_MAX
return ARG_MAX;
#else
return -1;
#endif
case _SC_CHILD_MAX:
#ifdef CHILD_MAX
return CHILD_MAX;
#else
return -1;
#endif
case _SC_CLK_TCK:
#ifdef CLK_TCK
return CLK_TCK;
#else
return 60;
#endif
case _SC_NGROUPS_MAX:
#ifdef NGROUPS_MAX
return NGROUPS_MAX;
#else
return -1;
#endif
case _SC_OPEN_MAX:
#if 0
return getdtablesize ();
#else
return -1;
#endif
case _SC_STREAM_MAX:
#ifdef STREAM_MAX
return STREAM_MAX;
#else
return FOPEN_MAX;
#endif
case _SC_TZNAME_MAX:
#if 0
return tzname_max ();
#else
return -1;
#endif
case _SC_JOB_CONTROL:
#ifdef _POSIX_JOB_CONTROL
return 1;
#else
return -1;
#endif
case _SC_SAVED_IDS:
#ifdef _POSIX_SAVED_IDS
return 1;
#else
return -1;
#endif
case _SC_REALTIME_SIGNALS:
#ifdef _POSIX_REALTIME_SIGNALS
return 1;
#else
return -1;
#endif
case _SC_PRIORITY_SCHEDULING:
#ifdef _POSIX_PRIORITY_SCHEDULING
return 1;
#else
return -1;
#endif
case _SC_TIMERS:
#ifdef _POSIX_TIMERS
return 1;
#else
return -1;
#endif
case _SC_ASYNCHRONOUS_IO:
#ifdef _POSIX_ASYNCHRONOUS_IO
return 1;
#else
return -1;
#endif
case _SC_PRIORITIZED_IO:
#ifdef _POSIX_PRIORITIZED_IO
return 1;
#else
return -1;
#endif
case _SC_SYNCHRONIZED_IO:
#ifdef _POSIX_SYNCHRONIZED_IO
return 1;
#else
return -1;
#endif
case _SC_FSYNC:
#ifdef _POSIX_FSYNC
return 1;
#else
return -1;
#endif
case _SC_MAPPED_FILES:
#ifdef _POSIX_MAPPED_FILES
return 1;
#else
return -1;
#endif
case _SC_MEMLOCK:
#ifdef _POSIX_MEMLOCK
return 1;
#else
return -1;
#endif
case _SC_MEMLOCK_RANGE:
#ifdef _POSIX_MEMLOCK_RANGE
return 1;
#else
return -1;
#endif
case _SC_MEMORY_PROTECTION:
#ifdef _POSIX_MEMORY_PROTECTION
return 1;
#else
return -1;
#endif
case _SC_MESSAGE_PASSING:
#ifdef _POSIX_MESSAGE_PASSING
return 1;
#else
return -1;
#endif
case _SC_SEMAPHORES:
#ifdef _POSIX_SEMAPHORES
return 1;
#else
return -1;
#endif
case _SC_SHARED_MEMORY_OBJECTS:
#ifdef _POSIX_SHARED_MEMORY_OBJECTS
return 1;
#else
return -1;
#endif
case _SC_VERSION:
return _POSIX_VERSION;
case _SC_PAGESIZE:
return getpagesize();
#endif
case _SC_AIO_LISTIO_MAX:
#ifdef AIO_LISTIO_MAX
return AIO_LISTIO_MAX;
#else
return -1;
#endif
case _SC_AIO_MAX:
#ifdef AIO_MAX
return AIO_MAX;
#else
return -1;
#endif
case _SC_AIO_PRIO_DELTA_MAX:
#ifdef AIO_PRIO_DELTA_MAX
return AIO_PRIO_DELTA_MAX;
#else
return -1;
#endif
case _SC_DELAYTIMER_MAX:
#ifdef DELAYTIMER_MAX
return DELAYTIMER_MAX;
#else
return -1;
#endif
case _SC_MQ_OPEN_MAX:
#ifdef MQ_OPEN_MAX
return MQ_OPEN_MAX;
#else
return -1;
#endif
case _SC_MQ_PRIO_MAX:
#ifdef MQ_PRIO_MAX
return MQ_PRIO_MAX;
#else
return -1;
#endif
case _SC_RTSIG_MAX:
#ifdef RTSIG_MAX
return RTSIG_MAX;
#else
return -1;
#endif
case _SC_SEM_NSEMS_MAX:
#ifdef SEM_NSEMS_MAX
return SEM_NSEMS_MAX;
#else
return -1;
#endif
case _SC_SEM_VALUE_MAX:
#ifdef SEM_VALUE_MAX
return SEM_VALUE_MAX;
#else
return -1;
#endif
case _SC_SIGQUEUE_MAX:
#ifdef SIGQUEUE_MAX
return SIGQUEUE_MAX;
#else
return -1;
#endif
case _SC_TIMER_MAX:
#ifdef TIMER_MAX
return TIMER_MAX;
#else
return -1;
#endif
case _SC_BC_BASE_MAX:
#ifdef BC_BASE_MAX
return BC_BASE_MAX;
#else
return -1;
#endif
case _SC_BC_DIM_MAX:
#ifdef BC_DIM_MAX
return BC_DIM_MAX;
#else
return -1;
#endif
case _SC_BC_SCALE_MAX:
#ifdef BC_SCALE_MAX
return BC_SCALE_MAX;
#else
return -1;
#endif
case _SC_BC_STRING_MAX:
#ifdef BC_STRING_MAX
return BC_STRING_MAX;
#else
return -1;
#endif
case _SC_COLL_WEIGHTS_MAX:
#ifdef COLL_WEIGHTS_MAX
return COLL_WEIGHTS_MAX;
#else
return -1;
#endif
case _SC_EQUIV_CLASS_MAX:
#ifdef EQUIV_CLASS_MAX
return EQUIV_CLASS_MAX;
#else
return -1;
#endif
case _SC_EXPR_NEST_MAX:
#ifdef EXPR_NEST_MAX
return EXPR_NEST_MAX;
#else
return -1;
#endif
case _SC_LINE_MAX:
#ifdef LINE_MAX
return LINE_MAX;
#else
return -1;
#endif
case _SC_RE_DUP_MAX:
#ifdef RE_DUP_MAX
return RE_DUP_MAX;
#else
return -1;
#endif
case _SC_CHARCLASS_NAME_MAX:
#ifdef CHARCLASS_NAME_MAX
return CHARCLASS_NAME_MAX;
#else
return -1;
#endif
case _SC_PII:
#ifdef _POSIX_PII
return 1;
#else
return -1;
#endif
case _SC_PII_XTI:
#ifdef _POSIX_PII_XTI
return 1;
#else
return -1;
#endif
case _SC_PII_SOCKET:
#ifdef _POSIX_PII_SOCKET
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET:
#ifdef _POSIX_PII_INTERNET
return 1;
#else
return -1;
#endif
case _SC_PII_OSI:
#ifdef _POSIX_PII_OSI
return 1;
#else
return -1;
#endif
case _SC_POLL:
#ifdef _POSIX_POLL
return 1;
#else
return -1;
#endif
case _SC_SELECT:
#ifdef _POSIX_SELECT
return 1;
#else
return -1;
#endif
case _SC_UIO_MAXIOV:
#ifdef UIO_MAXIOV
return UIO_MAXIOV;
#else
return -1;
#endif
case _SC_PII_INTERNET_STREAM:
#ifdef _POSIX_PII_INTERNET_STREAM
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET_DGRAM:
#ifdef _POSIX_PII_INTERNET_DGRAM
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_COTS:
#ifdef _POSIX_PII_OSI_COTS
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_CLTS:
#ifdef _POSIX_PII_OSI_CLTS
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_M:
#ifdef _POSIX_PII_OSI_M
return 1;
#else
return -1;
#endif
case _SC_T_IOV_MAX:
#ifdef _T_IOV_MAX
return _T_IOV_MAX;
#else
return -1;
#endif
case _SC_2_VERSION:
return _POSIX2_VERSION;
case _SC_2_C_BIND:
#ifdef _POSIX2_C_BIND
return _POSIX2_C_BIND;
#else
return -1;
#endif
case _SC_2_C_DEV:
#ifdef _POSIX2_C_DEV
return _POSIX2_C_DEV;
#else
return -1;
#endif
case _SC_2_C_VERSION:
#ifdef _POSIX2_C_VERSION
return _POSIX2_C_VERSION;
#else
return -1;
#endif
case _SC_2_FORT_DEV:
#ifdef _POSIX2_FORT_DEV
return _POSIX2_FORT_DEV;
#else
return -1;
#endif
case _SC_2_LOCALEDEF:
#ifdef _POSIX2_LOCALEDEF
return _POSIX2_LOCALEDEF;
#else
return -1;
#endif
case _SC_2_SW_DEV:
#ifdef _POSIX2_SW_DEV
return _POSIX2_SW_DEV;
#else
return -1;
#endif
case _SC_2_CHAR_TERM:
#ifdef _POSIX2_CHAR_TERM
return _POSIX2_CHAR_TERM;
#else
return -1;
#endif
case _SC_2_UPE:
#ifdef _POSIX2_UPE
return _POSIX2_UPE;
#else
return -1;
#endif
/* POSIX 1003.1c (POSIX Threads). */
case _SC_THREADS:
#ifdef _POSIX_THREADS
return 1;
#else
return -1;
#endif
case _SC_THREAD_SAFE_FUNCTIONS:
#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
return 1;
#else
return -1;
#endif
case _SC_GETGR_R_SIZE_MAX:
#ifdef NSS_BUFLEN_GROUP
return NSS_BUFLEN_GROUP;
#else
return -1;
#endif
case _SC_GETPW_R_SIZE_MAX:
#ifdef NSS_BUFLEN_PASSWD
return NSS_BUFLEN_PASSWD;
#else
return -1;
#endif
case _SC_LOGIN_NAME_MAX:
#ifdef _POSIX_LOGIN_NAME_MAX
return _POSIX_LOGIN_NAME_MAX;
#else
return -1;
#endif
case _SC_TTY_NAME_MAX:
#ifdef _POSIX_TTY_NAME_MAX
return _POSIX_TTY_NAME_MAX;
#else
return -1;
#endif
case _SC_THREAD_DESTRUCTOR_ITERATIONS:
#ifdef _POSIX_THREAD_DESTRUCTOR_ITERATIONS
return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
#else
return -1;
#endif
case _SC_THREAD_KEYS_MAX:
#ifdef PTHREAD_KEYS_MAX
return PTHREAD_KEYS_MAX;
#else
return -1;
#endif
case _SC_THREAD_STACK_MIN:
#ifdef PTHREAD_STACK_MIN
return PTHREAD_STACK_MIN;
#else
return -1;
#endif
case _SC_THREAD_THREADS_MAX:
#ifdef PTHREAD_THREADS_MAX
return PTHREAD_THREADS_MAX;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKADDR:
#ifdef _POSIX_THREAD_ATTR_STACKADDR
return 1;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKSIZE:
#ifdef _POSIX_THREAD_ATTR_STACKSIZE
return 1;
#else
return -1;
#endif
case _SC_THREAD_PRIORITY_SCHEDULING:
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
return 1;
#else
return -1;
#endif
case _SC_THREAD_PRIO_INHERIT:
#ifdef _POSIX_THREAD_PRIO_INHERIT
return 1;
#else
return -1;
#endif
case _SC_THREAD_PRIO_PROTECT:
#ifdef _POSIX_THREAD_PRIO_PROTECT
return 1;
#else
return -1;
#endif
case _SC_THREAD_PROCESS_SHARED:
#ifdef _POSIX_THREAD_PROCESS_SHARED
return 1;
#else
return -1;
#endif
case _SC_NPROCESSORS_CONF:
#if 0
return get_nprocs_conf ();
#else
return -1;
#endif
case _SC_NPROCESSORS_ONLN:
#if 0
return get_nprocs ();
#else
return -1;
#endif
case _SC_PHYS_PAGES:
#if 0
return get_phys_pages ();
#else
return -1;
#endif
case _SC_AVPHYS_PAGES:
#if 0
return get_avphys_pages ();
#else
return -1;
#endif
case _SC_ATEXIT_MAX:
/* We have no limit since we use lists. */
return INT_MAX;
case _SC_PASS_MAX:
/* We have no limit but since the return value might be used to
allocate a buffer we restrict the value. */
return BUFSIZ;
case _SC_XOPEN_VERSION:
return _XOPEN_VERSION;
case _SC_XOPEN_XCU_VERSION:
return _XOPEN_XCU_VERSION;
case _SC_XOPEN_UNIX:
return _XOPEN_UNIX;
case _SC_XOPEN_CRYPT:
#ifdef _XOPEN_CRYPT
return _XOPEN_CRYPT;
#else
return -1;
#endif
case _SC_XOPEN_ENH_I18N:
#ifdef _XOPEN_ENH_I18N
return _XOPEN_ENH_I18N;
#else
return -1;
#endif
case _SC_XOPEN_SHM:
#ifdef _XOPEN_SHM
return _XOPEN_SHM;
#else
return -1;
#endif
case _SC_XOPEN_XPG2:
#ifdef _XOPEN_XPG2
return _XOPEN_XPG2;
#else
return -1;
#endif
case _SC_XOPEN_XPG3:
#ifdef _XOPEN_XPG3
return _XOPEN_XPG3;
#else
return -1;
#endif
case _SC_XOPEN_XPG4:
#ifdef _XOPEN_XPG4
return _XOPEN_XPG4;
#else
return -1;
#endif
case _SC_CHAR_BIT:
return CHAR_BIT;
case _SC_CHAR_MAX:
return CHAR_MAX;
case _SC_CHAR_MIN:
return CHAR_MIN;
case _SC_INT_MAX:
return INT_MAX;
case _SC_INT_MIN:
return INT_MIN;
case _SC_LONG_BIT:
return sizeof (long int) * CHAR_BIT;
case _SC_WORD_BIT:
return sizeof (int) * CHAR_BIT;
case _SC_MB_LEN_MAX:
return MB_LEN_MAX;
case _SC_NZERO:
return NZERO;
case _SC_SSIZE_MAX:
return _POSIX_SSIZE_MAX;
case _SC_SCHAR_MAX:
return SCHAR_MAX;
case _SC_SCHAR_MIN:
return SCHAR_MIN;
case _SC_SHRT_MAX:
return SHRT_MAX;
case _SC_SHRT_MIN:
return SHRT_MIN;
case _SC_UCHAR_MAX:
return UCHAR_MAX;
case _SC_UINT_MAX:
return UINT_MAX;
case _SC_ULONG_MAX:
return ULONG_MAX;
case _SC_USHRT_MAX:
return USHRT_MAX;
case _SC_NL_ARGMAX:
#ifdef NL_ARGMAX
return NL_ARGMAX;
#else
return -1;
#endif
case _SC_NL_LANGMAX:
#ifdef NL_LANGMAX
return NL_LANGMAX;
#else
return -1;
#endif
case _SC_NL_MSGMAX:
#ifdef NL_MSGMAX
return NL_MSGMAX;
#else
return -1;
#endif
case _SC_NL_NMAX:
#ifdef NL_NMAX
return NL_NMAX;
#else
return -1;
#endif
case _SC_NL_SETMAX:
#ifdef NL_SETMAX
return NL_SETMAX;
#else
return -1;
#endif
case _SC_NL_TEXTMAX:
#ifdef NL_TEXTMAX
return NL_TEXTMAX;
#else
return -1;
#endif
case _SC_XBS5_ILP32_OFF32:
#ifdef _XBS5_ILP32_OFF32
return _XBS5_ILP32_OFF32;
#else
return -1;
#endif
case _SC_XBS5_ILP32_OFFBIG:
#ifdef _XBS5_ILP32_OFFBIG
return _XBS5_ILP32_OFFBIG;
#else
return -1;
#endif
case _SC_XBS5_LP64_OFF64:
#ifdef _XBS5_LP64_OFF64
return _XBS5_LP64_OFF64;
#else
return -1;
#endif
case _SC_XBS5_LPBIG_OFFBIG:
#ifdef _XBS5_LPBIG_OFFBIG
return _XBS5_LPBIG_OFFBIG;
#else
return -1;
#endif
case _SC_XOPEN_LEGACY:
return _XOPEN_LEGACY;
case _SC_XOPEN_REALTIME:
#ifdef _XOPEN_REALTIME
return _XOPEN_REALTIME;
#else
return -1;
#endif
case _SC_XOPEN_REALTIME_THREADS:
#ifdef _XOPEN_REALTIME_THREADS
return _XOPEN_REALTIME_THREADS;
#else
return -1;
#endif
}
}
|
