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 (c) 2013 Gary Mills
24 *
25 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1988 AT&T */
30 /* All Rights Reserved */
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 static int _ngroups_max;
61 extern int __xpg4;
62
63 switch (name) {
64 default:
65 errno = EINVAL;
66 return (-1L);
67
68 case _SC_ARG_MAX:
69 return ((long)ARG_MAX);
70
71 case _SC_CLK_TCK:
72 if (_hz <= 0)
73 _hz = _sysconfig(_CONFIG_CLK_TCK);
74 return (_hz);
75
76 case _SC_JOB_CONTROL:
77 return ((long)_POSIX_JOB_CONTROL);
78
79 case _SC_SAVED_IDS:
80 return ((long)_POSIX_SAVED_IDS);
81
82 case _SC_CHILD_MAX:
83 return (_sysconfig(_CONFIG_CHILD_MAX));
84
85 case _SC_NGROUPS_MAX:
86 if (_ngroups_max <= 0)
87 _ngroups_max = _sysconfig(_CONFIG_NGROUPS);
88 return (_ngroups_max);
89
90 case _SC_OPEN_MAX:
91 return (_sysconfig(_CONFIG_OPEN_FILES));
92
93 case _SC_VERSION:
94 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
95 return (200112L);
96 else
97 return (199506L);
98
99 case _SC_PAGESIZE:
100 if (_pagesize <= 0)
101 _pagesize = _sysconfig(_CONFIG_PAGESIZE);
102 return (_pagesize);
103
104 case _SC_XOPEN_VERSION:
105 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
106 return (600L);
107 else if (__xpg4 == 0)
108 return (_sysconfig(_CONFIG_XOPEN_VER));
109 else
110 return (4L);
111
112 case _SC_XOPEN_XCU_VERSION:
113 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
114 return (600L);
115 else
116 return (4L);
117
118 /*
119 * old value for pre XPG5 conformant systems to match
120 * getpass() length.
121 * XPG5 special cased with __sysconf_xpg5()
122 * new value for default and modern XPG systems.
123 */
124 case _SC_PASS_MAX:
125 if ((__xpg4 == 1) &&
126 (!(__xpg6 & _C99SUSv3_XPG6_sysconf_version)))
127 return ((long)_PASS_MAX_XPG);
128 else
129 return ((long)_PASS_MAX);
130
131 case _SC_LOGNAME_MAX:
132 return ((long)LOGNAME_MAX);
133
134 case _SC_STREAM_MAX:
135 return (_sysconfig(_CONFIG_OPEN_FILES));
136
137 case _SC_TZNAME_MAX:
138 return (-1L);
139
140 case _SC_NPROCESSORS_CONF:
141 return (_sysconfig(_CONFIG_NPROC_CONF));
142
143 case _SC_NPROCESSORS_ONLN:
144 return (_sysconfig(_CONFIG_NPROC_ONLN));
145
146 case _SC_NPROCESSORS_MAX:
147 return (_sysconfig(_CONFIG_NPROC_MAX));
148
149 case _SC_STACK_PROT:
150 if (_stackprot == 0)
151 _stackprot = _sysconfig(_CONFIG_STACK_PROT);
152 return (_stackprot);
153
154 /* POSIX.4 names */
155
156 /*
157 * Each of the following also have _POSIX_* symbols
158 * defined in <unistd.h>. Values here should align
159 * with values in the header. Up until the SUSv3 standard
160 * we defined these simply as 1. With the introduction
161 * of the new revision, these were changed to 200112L.
162 * The standard allows us to change the value, however,
163 * we have kept both values in case application programs
164 * are relying on the previous value even though an
165 * application doing so is technically wrong.
166 */
167 case _SC_ASYNCHRONOUS_IO:
168 case _SC_FSYNC:
169 case _SC_MAPPED_FILES:
170 case _SC_MEMLOCK:
171 case _SC_MEMLOCK_RANGE:
172 case _SC_MEMORY_PROTECTION:
173 case _SC_MESSAGE_PASSING:
174 case _SC_PRIORITY_SCHEDULING:
175 case _SC_REALTIME_SIGNALS:
176 case _SC_SEMAPHORES:
177 case _SC_SHARED_MEMORY_OBJECTS:
178 case _SC_SYNCHRONIZED_IO:
179 case _SC_TIMERS:
180 if (__xpg6 & _C99SUSv3_mode_ON)
181 return (200112L);
182 else
183 return (1L);
184
185 case _SC_PRIORITIZED_IO:
186 #ifdef _POSIX_PRIORITIZED_IO
187 return (1L);
188 #else
189 return (-1L);
190 #endif
191
192 case _SC_AIO_LISTIO_MAX:
193 return (_sysconfig(_CONFIG_AIO_LISTIO_MAX));
194
195 case _SC_AIO_MAX:
196 return (_sysconfig(_CONFIG_AIO_MAX));
197
198 case _SC_AIO_PRIO_DELTA_MAX:
199 return (_sysconfig(_CONFIG_AIO_PRIO_DELTA_MAX));
200
201 case _SC_DELAYTIMER_MAX:
202 return (_sysconfig(_CONFIG_DELAYTIMER_MAX));
203
204 case _SC_MQ_OPEN_MAX:
205 return (_sysconfig(_CONFIG_MQ_OPEN_MAX));
206
207 case _SC_MQ_PRIO_MAX:
208 return (_sysconfig(_CONFIG_MQ_PRIO_MAX));
209
210 case _SC_RTSIG_MAX:
211 return (_sysconfig(_CONFIG_RTSIG_MAX));
212
213 case _SC_SEM_NSEMS_MAX:
214 return (_sysconfig(_CONFIG_SEM_NSEMS_MAX));
215
216 case _SC_SEM_VALUE_MAX:
217 return (_sysconfig(_CONFIG_SEM_VALUE_MAX));
218
219 case _SC_SIGQUEUE_MAX:
220 return (_sysconfig(_CONFIG_SIGQUEUE_MAX));
221
222 case _SC_SIGRT_MAX:
223 return (_sysconfig(_CONFIG_SIGRT_MAX));
224
225 case _SC_SIGRT_MIN:
226 return (_sysconfig(_CONFIG_SIGRT_MIN));
227
228 case _SC_TIMER_MAX:
229 return (_sysconfig(_CONFIG_TIMER_MAX));
230
231 case _SC_PHYS_PAGES:
232 return (_sysconfig(_CONFIG_PHYS_PAGES));
233
234 case _SC_AVPHYS_PAGES:
235 return (_sysconfig(_CONFIG_AVPHYS_PAGES));
236
237 /* XPG4/POSIX.1-1990/POSIX.2-1992 names */
238 case _SC_2_C_BIND:
239 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
240 return (200112L);
241 else
242 return (1L);
243
244 case _SC_2_CHAR_TERM:
245 return ((long)_POSIX2_CHAR_TERM);
246
247 case _SC_2_C_DEV:
248 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
249 return (200112L);
250 else
251 return (1L);
252
253 case _SC_2_C_VERSION:
254 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
255 return (200112L);
256 else
257 return (199209L);
258
259 case _SC_2_FORT_DEV:
260 return (-1L);
261
262 case _SC_2_FORT_RUN:
263 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
264 return (200112L);
265 else
266 return (1L);
267
268 case _SC_2_LOCALEDEF:
269 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
270 return (200112L);
271 else
272 return (1L);
273
274 case _SC_2_SW_DEV:
275 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
276 return (200112L);
277 else
278 return (1L);
279
280 case _SC_2_UPE:
281 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
282 return (200112L);
283 else
284 return (1L);
285
286 case _SC_2_VERSION:
287 if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)
288 return (200112L);
289 else
290 return (199209L);
291
292 case _SC_BC_BASE_MAX:
293 return ((long)BC_BASE_MAX);
294
295 case _SC_BC_DIM_MAX:
296 return ((long)BC_DIM_MAX);
297
298 case _SC_BC_SCALE_MAX:
299 return ((long)BC_SCALE_MAX);
300
301 case _SC_BC_STRING_MAX:
302 return ((long)BC_STRING_MAX);
303
304 case _SC_COLL_WEIGHTS_MAX:
305 return ((long)COLL_WEIGHTS_MAX);
306
307 case _SC_EXPR_NEST_MAX:
308 return ((long)EXPR_NEST_MAX);
309
310 case _SC_LINE_MAX:
311 return ((long)LINE_MAX);
312
313 case _SC_RE_DUP_MAX:
314 return ((long)RE_DUP_MAX);
315
316 case _SC_XOPEN_CRYPT:
317 return (1L);
318
319 case _SC_XOPEN_ENH_I18N:
320 return ((long)_XOPEN_ENH_I18N);
321
322 case _SC_XOPEN_SHM:
323 return ((long)_XOPEN_SHM);
324
325 /* XPG4v2 (SUS) names */
326 case _SC_XOPEN_UNIX:
327 return (1L);
328
329 case _SC_XOPEN_LEGACY:
330 return (1L);
331
332 case _SC_ATEXIT_MAX:
333 return (-1L);
334
335 case _SC_IOV_MAX:
336 return ((long)IOV_MAX);
337
338 case _SC_T_IOV_MAX:
339 return ((long)T_IOV_MAX);
340
341 /* XPG5 (SUSv2) names */
342 case _SC_XOPEN_REALTIME:
343 return (1L);
344
345 case _SC_XOPEN_REALTIME_THREADS:
346 #if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && \
347 defined(_POSIX_THREAD_PRIO_INHERIT) && \
348 defined(_POSIX_THREAD_PRIO_PROTECT)
349 return (1L);
350 #else
351 return (-1L);
352 #endif
353
354 case _SC_XBS5_ILP32_OFF32:
355 return (1L);
356
357 case _SC_XBS5_ILP32_OFFBIG:
358 return (1L);
359
360 case _SC_XBS5_LP64_OFF64:
361 return (1L);
362
363 case _SC_XBS5_LPBIG_OFFBIG:
364 return (1L);
365
366 /* POSIX.1c names */
367 case _SC_THREAD_DESTRUCTOR_ITERATIONS:
368 return (-1L);
369
370 case _SC_GETGR_R_SIZE_MAX:
371 return ((long)_nss_get_bufsizes(_SC_GETGR_R_SIZE_MAX));
372
373 case _SC_GETPW_R_SIZE_MAX:
374 return ((long)NSS_BUFLEN_PASSWD);
375
376 case _SC_LOGIN_NAME_MAX:
377 return ((long)(LOGIN_NAME_MAX));
378
379 case _SC_THREAD_KEYS_MAX:
380 return (-1L);
381
382 case _SC_THREAD_STACK_MIN:
383 return ((long)thr_min_stack());
384
385 case _SC_THREAD_THREADS_MAX:
386 return (-1L);
387
388 case _SC_TTY_NAME_MAX:
389 return ((long)TTYNAME_MAX);
390
391 case _SC_BARRIERS:
392 return ((long)_POSIX_BARRIERS);
393
394 case _SC_CLOCK_SELECTION:
395 return ((long)_POSIX_CLOCK_SELECTION);
396
397 case _SC_MONOTONIC_CLOCK:
398 return ((long)_POSIX_MONOTONIC_CLOCK);
399
400 case _SC_SPAWN:
401 return ((long)_POSIX_SPAWN);
402
403 case _SC_SPIN_LOCKS:
404 return ((long)_POSIX_SPIN_LOCKS);
405
406 case _SC_THREADS:
407 case _SC_THREAD_ATTR_STACKADDR:
408 case _SC_THREAD_ATTR_STACKSIZE:
409 case _SC_THREAD_PRIORITY_SCHEDULING:
410 case _SC_THREAD_PRIO_INHERIT:
411 case _SC_THREAD_PRIO_PROTECT:
412 case _SC_THREAD_PROCESS_SHARED:
413 case _SC_THREAD_SAFE_FUNCTIONS:
414 if (__xpg6 & _C99SUSv3_mode_ON)
415 return (200112L);
416 else
417 return (1L);
418
419 case _SC_TIMEOUTS:
420 return ((long)_POSIX_TIMEOUTS);
421
422 /* 1216676 - cache info */
423 case _SC_COHER_BLKSZ:
424 return (_sysconfig(_CONFIG_COHERENCY));
425
426 case _SC_SPLIT_CACHE:
427 return (_sysconfig(_CONFIG_SPLIT_CACHE));
428
429 case _SC_ICACHE_SZ:
430 return (_sysconfig(_CONFIG_ICACHESZ));
431
432 case _SC_DCACHE_SZ:
433 return (_sysconfig(_CONFIG_DCACHESZ));
434
435 case _SC_ICACHE_LINESZ:
436 return (_sysconfig(_CONFIG_ICACHELINESZ));
437
438 case _SC_DCACHE_LINESZ:
439 return (_sysconfig(_CONFIG_DCACHELINESZ));
440
441 case _SC_ICACHE_BLKSZ:
442 return (_sysconfig(_CONFIG_ICACHEBLKSZ));
443
444 case _SC_DCACHE_BLKSZ:
445 return (_sysconfig(_CONFIG_DCACHEBLKSZ));
446
447 case _SC_DCACHE_TBLKSZ:
448 return (_sysconfig(_CONFIG_DCACHETBLKSZ));
449
450 case _SC_ICACHE_ASSOC:
451 return (_sysconfig(_CONFIG_ICACHE_ASSOC));
452
453 case _SC_DCACHE_ASSOC:
454 return (_sysconfig(_CONFIG_DCACHE_ASSOC));
455
456 case _SC_MAXPID:
457 if (_maxpid <= 0)
458 _maxpid = _sysconfig(_CONFIG_MAXPID);
459 return (_maxpid);
460
461 case _SC_CPUID_MAX:
462 return (_sysconfig(_CONFIG_CPUID_MAX));
463
464 case _SC_EPHID_MAX:
465 return (_sysconfig(_CONFIG_EPHID_MAX));
466
467 /* UNIX 03 names - XPG6/SUSv3/POSIX.1-2001 */
468
469 case _SC_REGEXP:
470 return ((long)_POSIX_REGEXP);
471
472 case _SC_SHELL:
473 return ((long)_POSIX_SHELL);
474
475 case _SC_ADVISORY_INFO:
476 return ((long)_POSIX_ADVISORY_INFO);
477
478 case _SC_HOST_NAME_MAX:
479 return ((long)_POSIX_HOST_NAME_MAX);
480
481 case _SC_READER_WRITER_LOCKS:
482 return ((long)_POSIX_READER_WRITER_LOCKS);
483
484 case _SC_IPV6:
485 return ((long)_POSIX_IPV6);
486
487 case _SC_RAW_SOCKETS:
488 return ((long)_POSIX_RAW_SOCKETS);
489
490 case _SC_XOPEN_STREAMS:
491 return ((long)_XOPEN_STREAMS);
492
493 case _SC_SYMLOOP_MAX:
494 return (_sysconfig(_CONFIG_SYMLOOP_MAX));
495
496 case _SC_V6_ILP32_OFF32:
497 return (1L);
498
499 case _SC_V6_ILP32_OFFBIG:
500 return (1L);
501
502 case _SC_V6_LP64_OFF64:
503 return (1L);
504
505 case _SC_V6_LPBIG_OFFBIG:
506 return (1L);
507
508 /* Unsupported UNIX 03 options */
509 case _SC_2_PBS:
510 case _SC_2_PBS_ACCOUNTING:
511 case _SC_2_PBS_CHECKPOINT:
512 case _SC_2_PBS_LOCATE:
513 case _SC_2_PBS_MESSAGE:
514 case _SC_2_PBS_TRACK:
515 case _SC_CPUTIME:
516 case _SC_SPORADIC_SERVER:
517 case _SC_SS_REPL_MAX:
518 case _SC_THREAD_CPUTIME:
519 case _SC_THREAD_SPORADIC_SERVER:
520 case _SC_TRACE:
521 case _SC_TRACE_EVENT_FILTER:
522 case _SC_TRACE_EVENT_NAME_MAX:
523 case _SC_TRACE_INHERIT:
524 case _SC_TRACE_LOG:
525 case _SC_TRACE_NAME_MAX:
526 case _SC_TRACE_SYS_MAX:
527 case _SC_TRACE_USER_EVENT_MAX:
528 case _SC_TYPED_MEMORY_OBJECTS:
529 return (-1L);
530 }
531 }
532
533 /*
534 * UNIX 98 version of sysconf needed in order to set _XOPEN_VERSION to 500.
535 */
536
537 long
538 __sysconf_xpg5(int name)
539 {
540 switch (name) {
541 default:
542 return (sysconf(name));
543 case _SC_XOPEN_VERSION:
544 return (500L);
545 case _SC_PASS_MAX:
546 return ((long)_PASS_MAX_XPG);
547 }
548 }