1/*-
2 * Copyright (c) 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 * Sean Eric Fagan of Cygnus Support.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 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 * Sean Eric Fagan of Cygnus Support.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
|
37__FBSDID("$FreeBSD: head/lib/libc/gen/sysconf.c 237660 2012-06-27 20:32:45Z kib $");
| 37__FBSDID("$FreeBSD: head/lib/libc/gen/sysconf.c 239347 2012-08-17 02:26:31Z davidxu $");
|
38
39#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/sysctl.h>
42#include <sys/resource.h>
43#include <sys/socket.h>
44
45#include <elf.h>
46#include <errno.h>
47#include <limits.h>
48#include <paths.h>
49#include <pthread.h> /* we just need the limits */
50#include <time.h>
51#include <unistd.h>
52
53#include "../stdlib/atexit.h"
54#include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */
55#include "libc_private.h"
56
57#define _PATH_ZONEINFO TZDIR /* from tzfile.h */
58
59/*
60 * sysconf --
61 * get configurable system variables.
62 *
63 * XXX
64 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
65 * not change during the lifetime of the calling process. This would seem
66 * to require that any change to system limits kill all running processes.
67 * A workaround might be to cache the values when they are first retrieved
68 * and then simply return the cached value on subsequent calls. This is
69 * less useful than returning up-to-date values, however.
70 */
71long
72sysconf(name)
73 int name;
74{
75 struct rlimit rl;
76 size_t len;
77 int mib[2], sverrno, value;
78 long lvalue, defaultresult;
79 const char *path;
80
81 defaultresult = -1;
82
83 switch (name) {
84 case _SC_ARG_MAX:
85 mib[0] = CTL_KERN;
86 mib[1] = KERN_ARGMAX;
87 break;
88 case _SC_CHILD_MAX:
89 if (getrlimit(RLIMIT_NPROC, &rl) != 0)
90 return (-1);
91 if (rl.rlim_cur == RLIM_INFINITY)
92 return (-1);
93 if (rl.rlim_cur > LONG_MAX) {
94 errno = EOVERFLOW;
95 return (-1);
96 }
97 return ((long)rl.rlim_cur);
98 case _SC_CLK_TCK:
99 return (CLK_TCK);
100 case _SC_NGROUPS_MAX:
101 mib[0] = CTL_KERN;
102 mib[1] = KERN_NGROUPS;
103 break;
104 case _SC_OPEN_MAX:
105 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
106 return (-1);
107 if (rl.rlim_cur == RLIM_INFINITY)
108 return (-1);
109 if (rl.rlim_cur > LONG_MAX) {
110 errno = EOVERFLOW;
111 return (-1);
112 }
113 return ((long)rl.rlim_cur);
114 case _SC_STREAM_MAX:
115 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
116 return (-1);
117 if (rl.rlim_cur == RLIM_INFINITY)
118 return (-1);
119 if (rl.rlim_cur > LONG_MAX) {
120 errno = EOVERFLOW;
121 return (-1);
122 }
123 /*
124 * struct __sFILE currently has a limitation that
125 * file descriptors must fit in a signed short.
126 * This doesn't precisely capture the letter of POSIX
127 * but approximates the spirit.
128 */
129 if (rl.rlim_cur > SHRT_MAX)
130 return (SHRT_MAX);
131
132 return ((long)rl.rlim_cur);
133 case _SC_JOB_CONTROL:
134 return (_POSIX_JOB_CONTROL);
135 case _SC_SAVED_IDS:
136 /* XXX - must be 1 */
137 mib[0] = CTL_KERN;
138 mib[1] = KERN_SAVED_IDS;
139 goto yesno;
140 case _SC_VERSION:
141 mib[0] = CTL_KERN;
142 mib[1] = KERN_POSIX1;
143 break;
144 case _SC_BC_BASE_MAX:
145 return (BC_BASE_MAX);
146 case _SC_BC_DIM_MAX:
147 return (BC_DIM_MAX);
148 case _SC_BC_SCALE_MAX:
149 return (BC_SCALE_MAX);
150 case _SC_BC_STRING_MAX:
151 return (BC_STRING_MAX);
152 case _SC_COLL_WEIGHTS_MAX:
153 return (COLL_WEIGHTS_MAX);
154 case _SC_EXPR_NEST_MAX:
155 return (EXPR_NEST_MAX);
156 case _SC_LINE_MAX:
157 return (LINE_MAX);
158 case _SC_RE_DUP_MAX:
159 return (RE_DUP_MAX);
160 case _SC_2_VERSION:
161 /*
162 * This is something of a lie, but it would be silly at
163 * this point to try to deduce this from the contents
164 * of the filesystem.
165 */
166 return (_POSIX2_VERSION);
167 case _SC_2_C_BIND:
168 return (_POSIX2_C_BIND);
169 case _SC_2_C_DEV:
170 return (_POSIX2_C_DEV);
171 case _SC_2_CHAR_TERM:
172 return (_POSIX2_CHAR_TERM);
173 case _SC_2_FORT_DEV:
174 return (_POSIX2_FORT_DEV);
175 case _SC_2_FORT_RUN:
176 return (_POSIX2_FORT_RUN);
177 case _SC_2_LOCALEDEF:
178 return (_POSIX2_LOCALEDEF);
179 case _SC_2_SW_DEV:
180 return (_POSIX2_SW_DEV);
181 case _SC_2_UPE:
182 return (_POSIX2_UPE);
183 case _SC_TZNAME_MAX:
184 path = _PATH_ZONEINFO;
185do_NAME_MAX:
186 sverrno = errno;
187 errno = 0;
188 lvalue = pathconf(path, _PC_NAME_MAX);
189 if (lvalue == -1 && errno != 0)
190 return (-1);
191 errno = sverrno;
192 return (lvalue);
193
194 case _SC_ASYNCHRONOUS_IO:
195#if _POSIX_ASYNCHRONOUS_IO == 0
196 mib[0] = CTL_P1003_1B;
197 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO;
198 break;
199#else
200 return (_POSIX_ASYNCHRONOUS_IO);
201#endif
202 case _SC_MAPPED_FILES:
203 return (_POSIX_MAPPED_FILES);
204 case _SC_MEMLOCK:
205 return (_POSIX_MEMLOCK);
206 case _SC_MEMLOCK_RANGE:
207 return (_POSIX_MEMLOCK_RANGE);
208 case _SC_MEMORY_PROTECTION:
209 return (_POSIX_MEMORY_PROTECTION);
210 case _SC_MESSAGE_PASSING:
211#if _POSIX_MESSAGE_PASSING == 0
212 mib[0] = CTL_P1003_1B;
213 mib[1] = CTL_P1003_1B_MESSAGE_PASSING;
214 goto yesno;
215#else
216 return (_POSIX_MESSAGE_PASSING);
217#endif
218 case _SC_PRIORITIZED_IO:
219#if _POSIX_PRIORITIZED_IO == 0
220 mib[0] = CTL_P1003_1B;
221 mib[1] = CTL_P1003_1B_PRIORITIZED_IO;
222 goto yesno;
223#else
224 return (_POSIX_PRIORITIZED_IO);
225#endif
226 case _SC_PRIORITY_SCHEDULING:
227#if _POSIX_PRIORITY_SCHEDULING == 0
228 mib[0] = CTL_P1003_1B;
229 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING;
230 goto yesno;
231#else
232 return (_POSIX_PRIORITY_SCHEDULING);
233#endif
234 case _SC_REALTIME_SIGNALS:
235#if _POSIX_REALTIME_SIGNALS == 0
236 mib[0] = CTL_P1003_1B;
237 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS;
238 goto yesno;
239#else
240 return (_POSIX_REALTIME_SIGNALS);
241#endif
242 case _SC_SEMAPHORES:
243#if _POSIX_SEMAPHORES == 0
244 mib[0] = CTL_P1003_1B;
245 mib[1] = CTL_P1003_1B_SEMAPHORES;
246 goto yesno;
247#else
248 return (_POSIX_SEMAPHORES);
249#endif
250 case _SC_FSYNC:
251 return (_POSIX_FSYNC);
252
253 case _SC_SHARED_MEMORY_OBJECTS:
254 return (_POSIX_SHARED_MEMORY_OBJECTS);
255 case _SC_SYNCHRONIZED_IO:
256#if _POSIX_SYNCHRONIZED_IO == 0
257 mib[0] = CTL_P1003_1B;
258 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO;
259 goto yesno;
260#else
261 return (_POSIX_SYNCHRONIZED_IO);
262#endif
263 case _SC_TIMERS:
264#if _POSIX_TIMERS == 0
265 mib[0] = CTL_P1003_1B;
266 mib[1] = CTL_P1003_1B_TIMERS;
267 goto yesno;
268#else
269 return (_POSIX_TIMERS);
270#endif
271 case _SC_AIO_LISTIO_MAX:
272 mib[0] = CTL_P1003_1B;
273 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX;
274 break;
275 case _SC_AIO_MAX:
276 mib[0] = CTL_P1003_1B;
277 mib[1] = CTL_P1003_1B_AIO_MAX;
278 break;
279 case _SC_AIO_PRIO_DELTA_MAX:
280 mib[0] = CTL_P1003_1B;
281 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX;
282 break;
283 case _SC_DELAYTIMER_MAX:
284 mib[0] = CTL_P1003_1B;
285 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX;
286 goto yesno;
287 case _SC_MQ_OPEN_MAX:
288 mib[0] = CTL_P1003_1B;
289 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX;
290 goto yesno;
291 case _SC_PAGESIZE:
292 defaultresult = getpagesize();
293 mib[0] = CTL_P1003_1B;
294 mib[1] = CTL_P1003_1B_PAGESIZE;
295 goto yesno;
296 case _SC_RTSIG_MAX:
297 mib[0] = CTL_P1003_1B;
298 mib[1] = CTL_P1003_1B_RTSIG_MAX;
299 goto yesno;
300 case _SC_SEM_NSEMS_MAX:
301 mib[0] = CTL_P1003_1B;
302 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX;
303 goto yesno;
304 case _SC_SEM_VALUE_MAX:
305 mib[0] = CTL_P1003_1B;
306 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX;
307 goto yesno;
308 case _SC_SIGQUEUE_MAX:
309 mib[0] = CTL_P1003_1B;
310 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
311 goto yesno;
312 case _SC_TIMER_MAX:
313 mib[0] = CTL_P1003_1B;
314 mib[1] = CTL_P1003_1B_TIMER_MAX;
315yesno:
316 len = sizeof(value);
317 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
318 return (-1);
319 if (value == 0)
320 return (defaultresult);
321 return ((long)value);
322
323 case _SC_2_PBS:
324 case _SC_2_PBS_ACCOUNTING:
325 case _SC_2_PBS_CHECKPOINT:
326 case _SC_2_PBS_LOCATE:
327 case _SC_2_PBS_MESSAGE:
328 case _SC_2_PBS_TRACK:
329#if _POSIX2_PBS == 0
330#error "don't know how to determine _SC_2_PBS"
331 /*
332 * This probably requires digging through the filesystem
333 * to see if the appropriate package has been installed.
334 * Since we don't currently support this option at all,
335 * it's not worth the effort to write the code now.
336 * Figuring out which of the sub-options are supported
337 * would be even more difficult, so it's probably easier
338 * to always say ``no''.
339 */
340#else
341 return (_POSIX2_PBS);
342#endif
343 case _SC_ADVISORY_INFO:
344#if _POSIX_ADVISORY_INFO == 0
345#error "_POSIX_ADVISORY_INFO"
346#else
347 return (_POSIX_ADVISORY_INFO);
348#endif
349 case _SC_BARRIERS:
350#if _POSIX_BARRIERS == 0
351#error "_POSIX_BARRIERS"
352#else
353 return (_POSIX_BARRIERS);
354#endif
355 case _SC_CLOCK_SELECTION:
356#if _POSIX_CLOCK_SELECTION == 0
357#error "_POSIX_CLOCK_SELECTION"
358#else
359 return (_POSIX_CLOCK_SELECTION);
360#endif
361 case _SC_CPUTIME:
| 38
39#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/sysctl.h>
42#include <sys/resource.h>
43#include <sys/socket.h>
44
45#include <elf.h>
46#include <errno.h>
47#include <limits.h>
48#include <paths.h>
49#include <pthread.h> /* we just need the limits */
50#include <time.h>
51#include <unistd.h>
52
53#include "../stdlib/atexit.h"
54#include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */
55#include "libc_private.h"
56
57#define _PATH_ZONEINFO TZDIR /* from tzfile.h */
58
59/*
60 * sysconf --
61 * get configurable system variables.
62 *
63 * XXX
64 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
65 * not change during the lifetime of the calling process. This would seem
66 * to require that any change to system limits kill all running processes.
67 * A workaround might be to cache the values when they are first retrieved
68 * and then simply return the cached value on subsequent calls. This is
69 * less useful than returning up-to-date values, however.
70 */
71long
72sysconf(name)
73 int name;
74{
75 struct rlimit rl;
76 size_t len;
77 int mib[2], sverrno, value;
78 long lvalue, defaultresult;
79 const char *path;
80
81 defaultresult = -1;
82
83 switch (name) {
84 case _SC_ARG_MAX:
85 mib[0] = CTL_KERN;
86 mib[1] = KERN_ARGMAX;
87 break;
88 case _SC_CHILD_MAX:
89 if (getrlimit(RLIMIT_NPROC, &rl) != 0)
90 return (-1);
91 if (rl.rlim_cur == RLIM_INFINITY)
92 return (-1);
93 if (rl.rlim_cur > LONG_MAX) {
94 errno = EOVERFLOW;
95 return (-1);
96 }
97 return ((long)rl.rlim_cur);
98 case _SC_CLK_TCK:
99 return (CLK_TCK);
100 case _SC_NGROUPS_MAX:
101 mib[0] = CTL_KERN;
102 mib[1] = KERN_NGROUPS;
103 break;
104 case _SC_OPEN_MAX:
105 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
106 return (-1);
107 if (rl.rlim_cur == RLIM_INFINITY)
108 return (-1);
109 if (rl.rlim_cur > LONG_MAX) {
110 errno = EOVERFLOW;
111 return (-1);
112 }
113 return ((long)rl.rlim_cur);
114 case _SC_STREAM_MAX:
115 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
116 return (-1);
117 if (rl.rlim_cur == RLIM_INFINITY)
118 return (-1);
119 if (rl.rlim_cur > LONG_MAX) {
120 errno = EOVERFLOW;
121 return (-1);
122 }
123 /*
124 * struct __sFILE currently has a limitation that
125 * file descriptors must fit in a signed short.
126 * This doesn't precisely capture the letter of POSIX
127 * but approximates the spirit.
128 */
129 if (rl.rlim_cur > SHRT_MAX)
130 return (SHRT_MAX);
131
132 return ((long)rl.rlim_cur);
133 case _SC_JOB_CONTROL:
134 return (_POSIX_JOB_CONTROL);
135 case _SC_SAVED_IDS:
136 /* XXX - must be 1 */
137 mib[0] = CTL_KERN;
138 mib[1] = KERN_SAVED_IDS;
139 goto yesno;
140 case _SC_VERSION:
141 mib[0] = CTL_KERN;
142 mib[1] = KERN_POSIX1;
143 break;
144 case _SC_BC_BASE_MAX:
145 return (BC_BASE_MAX);
146 case _SC_BC_DIM_MAX:
147 return (BC_DIM_MAX);
148 case _SC_BC_SCALE_MAX:
149 return (BC_SCALE_MAX);
150 case _SC_BC_STRING_MAX:
151 return (BC_STRING_MAX);
152 case _SC_COLL_WEIGHTS_MAX:
153 return (COLL_WEIGHTS_MAX);
154 case _SC_EXPR_NEST_MAX:
155 return (EXPR_NEST_MAX);
156 case _SC_LINE_MAX:
157 return (LINE_MAX);
158 case _SC_RE_DUP_MAX:
159 return (RE_DUP_MAX);
160 case _SC_2_VERSION:
161 /*
162 * This is something of a lie, but it would be silly at
163 * this point to try to deduce this from the contents
164 * of the filesystem.
165 */
166 return (_POSIX2_VERSION);
167 case _SC_2_C_BIND:
168 return (_POSIX2_C_BIND);
169 case _SC_2_C_DEV:
170 return (_POSIX2_C_DEV);
171 case _SC_2_CHAR_TERM:
172 return (_POSIX2_CHAR_TERM);
173 case _SC_2_FORT_DEV:
174 return (_POSIX2_FORT_DEV);
175 case _SC_2_FORT_RUN:
176 return (_POSIX2_FORT_RUN);
177 case _SC_2_LOCALEDEF:
178 return (_POSIX2_LOCALEDEF);
179 case _SC_2_SW_DEV:
180 return (_POSIX2_SW_DEV);
181 case _SC_2_UPE:
182 return (_POSIX2_UPE);
183 case _SC_TZNAME_MAX:
184 path = _PATH_ZONEINFO;
185do_NAME_MAX:
186 sverrno = errno;
187 errno = 0;
188 lvalue = pathconf(path, _PC_NAME_MAX);
189 if (lvalue == -1 && errno != 0)
190 return (-1);
191 errno = sverrno;
192 return (lvalue);
193
194 case _SC_ASYNCHRONOUS_IO:
195#if _POSIX_ASYNCHRONOUS_IO == 0
196 mib[0] = CTL_P1003_1B;
197 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO;
198 break;
199#else
200 return (_POSIX_ASYNCHRONOUS_IO);
201#endif
202 case _SC_MAPPED_FILES:
203 return (_POSIX_MAPPED_FILES);
204 case _SC_MEMLOCK:
205 return (_POSIX_MEMLOCK);
206 case _SC_MEMLOCK_RANGE:
207 return (_POSIX_MEMLOCK_RANGE);
208 case _SC_MEMORY_PROTECTION:
209 return (_POSIX_MEMORY_PROTECTION);
210 case _SC_MESSAGE_PASSING:
211#if _POSIX_MESSAGE_PASSING == 0
212 mib[0] = CTL_P1003_1B;
213 mib[1] = CTL_P1003_1B_MESSAGE_PASSING;
214 goto yesno;
215#else
216 return (_POSIX_MESSAGE_PASSING);
217#endif
218 case _SC_PRIORITIZED_IO:
219#if _POSIX_PRIORITIZED_IO == 0
220 mib[0] = CTL_P1003_1B;
221 mib[1] = CTL_P1003_1B_PRIORITIZED_IO;
222 goto yesno;
223#else
224 return (_POSIX_PRIORITIZED_IO);
225#endif
226 case _SC_PRIORITY_SCHEDULING:
227#if _POSIX_PRIORITY_SCHEDULING == 0
228 mib[0] = CTL_P1003_1B;
229 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING;
230 goto yesno;
231#else
232 return (_POSIX_PRIORITY_SCHEDULING);
233#endif
234 case _SC_REALTIME_SIGNALS:
235#if _POSIX_REALTIME_SIGNALS == 0
236 mib[0] = CTL_P1003_1B;
237 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS;
238 goto yesno;
239#else
240 return (_POSIX_REALTIME_SIGNALS);
241#endif
242 case _SC_SEMAPHORES:
243#if _POSIX_SEMAPHORES == 0
244 mib[0] = CTL_P1003_1B;
245 mib[1] = CTL_P1003_1B_SEMAPHORES;
246 goto yesno;
247#else
248 return (_POSIX_SEMAPHORES);
249#endif
250 case _SC_FSYNC:
251 return (_POSIX_FSYNC);
252
253 case _SC_SHARED_MEMORY_OBJECTS:
254 return (_POSIX_SHARED_MEMORY_OBJECTS);
255 case _SC_SYNCHRONIZED_IO:
256#if _POSIX_SYNCHRONIZED_IO == 0
257 mib[0] = CTL_P1003_1B;
258 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO;
259 goto yesno;
260#else
261 return (_POSIX_SYNCHRONIZED_IO);
262#endif
263 case _SC_TIMERS:
264#if _POSIX_TIMERS == 0
265 mib[0] = CTL_P1003_1B;
266 mib[1] = CTL_P1003_1B_TIMERS;
267 goto yesno;
268#else
269 return (_POSIX_TIMERS);
270#endif
271 case _SC_AIO_LISTIO_MAX:
272 mib[0] = CTL_P1003_1B;
273 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX;
274 break;
275 case _SC_AIO_MAX:
276 mib[0] = CTL_P1003_1B;
277 mib[1] = CTL_P1003_1B_AIO_MAX;
278 break;
279 case _SC_AIO_PRIO_DELTA_MAX:
280 mib[0] = CTL_P1003_1B;
281 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX;
282 break;
283 case _SC_DELAYTIMER_MAX:
284 mib[0] = CTL_P1003_1B;
285 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX;
286 goto yesno;
287 case _SC_MQ_OPEN_MAX:
288 mib[0] = CTL_P1003_1B;
289 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX;
290 goto yesno;
291 case _SC_PAGESIZE:
292 defaultresult = getpagesize();
293 mib[0] = CTL_P1003_1B;
294 mib[1] = CTL_P1003_1B_PAGESIZE;
295 goto yesno;
296 case _SC_RTSIG_MAX:
297 mib[0] = CTL_P1003_1B;
298 mib[1] = CTL_P1003_1B_RTSIG_MAX;
299 goto yesno;
300 case _SC_SEM_NSEMS_MAX:
301 mib[0] = CTL_P1003_1B;
302 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX;
303 goto yesno;
304 case _SC_SEM_VALUE_MAX:
305 mib[0] = CTL_P1003_1B;
306 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX;
307 goto yesno;
308 case _SC_SIGQUEUE_MAX:
309 mib[0] = CTL_P1003_1B;
310 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
311 goto yesno;
312 case _SC_TIMER_MAX:
313 mib[0] = CTL_P1003_1B;
314 mib[1] = CTL_P1003_1B_TIMER_MAX;
315yesno:
316 len = sizeof(value);
317 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
318 return (-1);
319 if (value == 0)
320 return (defaultresult);
321 return ((long)value);
322
323 case _SC_2_PBS:
324 case _SC_2_PBS_ACCOUNTING:
325 case _SC_2_PBS_CHECKPOINT:
326 case _SC_2_PBS_LOCATE:
327 case _SC_2_PBS_MESSAGE:
328 case _SC_2_PBS_TRACK:
329#if _POSIX2_PBS == 0
330#error "don't know how to determine _SC_2_PBS"
331 /*
332 * This probably requires digging through the filesystem
333 * to see if the appropriate package has been installed.
334 * Since we don't currently support this option at all,
335 * it's not worth the effort to write the code now.
336 * Figuring out which of the sub-options are supported
337 * would be even more difficult, so it's probably easier
338 * to always say ``no''.
339 */
340#else
341 return (_POSIX2_PBS);
342#endif
343 case _SC_ADVISORY_INFO:
344#if _POSIX_ADVISORY_INFO == 0
345#error "_POSIX_ADVISORY_INFO"
346#else
347 return (_POSIX_ADVISORY_INFO);
348#endif
349 case _SC_BARRIERS:
350#if _POSIX_BARRIERS == 0
351#error "_POSIX_BARRIERS"
352#else
353 return (_POSIX_BARRIERS);
354#endif
355 case _SC_CLOCK_SELECTION:
356#if _POSIX_CLOCK_SELECTION == 0
357#error "_POSIX_CLOCK_SELECTION"
358#else
359 return (_POSIX_CLOCK_SELECTION);
360#endif
361 case _SC_CPUTIME:
|
362#if _POSIX_CPUTIME == 0
363#error "_POSIX_CPUTIME"
364#else
| |
365 return (_POSIX_CPUTIME);
| 362 return (_POSIX_CPUTIME);
|
366#endif
| |
367#ifdef notdef
368 case _SC_FILE_LOCKING:
369 /*
370 * XXX - The standard doesn't tell us how to define
371 * _POSIX_FILE_LOCKING, so we can't answer this one.
372 */
373#endif
374#if _POSIX_THREAD_SAFE_FUNCTIONS > -1
375 case _SC_GETGR_R_SIZE_MAX:
376 case _SC_GETPW_R_SIZE_MAX:
377#error "somebody needs to implement this"
378#endif
379 case _SC_HOST_NAME_MAX:
380 return (MAXHOSTNAMELEN - 1); /* does not include \0 */
381 case _SC_LOGIN_NAME_MAX:
382 return (MAXLOGNAME);
383 case _SC_MONOTONIC_CLOCK:
384#if _POSIX_MONOTONIC_CLOCK == 0
385#error "_POSIX_MONOTONIC_CLOCK"
386#else
387 return (_POSIX_MONOTONIC_CLOCK);
388#endif
389#if _POSIX_MESSAGE_PASSING > -1
390 case _SC_MQ_PRIO_MAX:
391 return (MQ_PRIO_MAX);
392#endif
393 case _SC_READER_WRITER_LOCKS:
394 return (_POSIX_READER_WRITER_LOCKS);
395 case _SC_REGEXP:
396 return (_POSIX_REGEXP);
397 case _SC_SHELL:
398 return (_POSIX_SHELL);
399 case _SC_SPAWN:
400 return (_POSIX_SPAWN);
401 case _SC_SPIN_LOCKS:
402 return (_POSIX_SPIN_LOCKS);
403 case _SC_SPORADIC_SERVER:
404#if _POSIX_SPORADIC_SERVER == 0
405#error "_POSIX_SPORADIC_SERVER"
406#else
407 return (_POSIX_SPORADIC_SERVER);
408#endif
409 case _SC_THREAD_ATTR_STACKADDR:
410 return (_POSIX_THREAD_ATTR_STACKADDR);
411 case _SC_THREAD_ATTR_STACKSIZE:
412 return (_POSIX_THREAD_ATTR_STACKSIZE);
413 case _SC_THREAD_CPUTIME:
414 return (_POSIX_THREAD_CPUTIME);
415 case _SC_THREAD_DESTRUCTOR_ITERATIONS:
416 return (PTHREAD_DESTRUCTOR_ITERATIONS);
417 case _SC_THREAD_KEYS_MAX:
418 return (PTHREAD_KEYS_MAX);
419 case _SC_THREAD_PRIO_INHERIT:
420 return (_POSIX_THREAD_PRIO_INHERIT);
421 case _SC_THREAD_PRIO_PROTECT:
422 return (_POSIX_THREAD_PRIO_PROTECT);
423 case _SC_THREAD_PRIORITY_SCHEDULING:
424 return (_POSIX_THREAD_PRIORITY_SCHEDULING);
425 case _SC_THREAD_PROCESS_SHARED:
426 return (_POSIX_THREAD_PROCESS_SHARED);
427 case _SC_THREAD_SAFE_FUNCTIONS:
428 return (_POSIX_THREAD_SAFE_FUNCTIONS);
429 case _SC_THREAD_STACK_MIN:
430 return (PTHREAD_STACK_MIN);
431 case _SC_THREAD_THREADS_MAX:
432 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */
433 case _SC_TIMEOUTS:
434 return (_POSIX_TIMEOUTS);
435 case _SC_THREADS:
436 return (_POSIX_THREADS);
437 case _SC_TRACE:
438#if _POSIX_TRACE == 0
439#error "_POSIX_TRACE"
440 /* While you're implementing this, also do the ones below. */
441#else
442 return (_POSIX_TRACE);
443#endif
444#if _POSIX_TRACE > -1
445 case _SC_TRACE_EVENT_FILTER:
446 return (_POSIX_TRACE_EVENT_FILTER);
447 case _SC_TRACE_INHERIT:
448 return (_POSIX_TRACE_INHERIT);
449 case _SC_TRACE_LOG:
450 return (_POSIX_TRACE_LOG);
451#endif
452 case _SC_TTY_NAME_MAX:
453 path = _PATH_DEV;
454 goto do_NAME_MAX;
455 case _SC_TYPED_MEMORY_OBJECTS:
456#if _POSIX_TYPED_MEMORY_OBJECTS == 0
457#error "_POSIX_TYPED_MEMORY_OBJECTS"
458#else
459 return (_POSIX_TYPED_MEMORY_OBJECTS);
460#endif
461 case _SC_V6_ILP32_OFF32:
462#if _V6_ILP32_OFF32 == 0
463 if (sizeof(int) * CHAR_BIT == 32 &&
464 sizeof(int) == sizeof(long) &&
465 sizeof(long) == sizeof(void *) &&
466 sizeof(void *) == sizeof(off_t))
467 return 1;
468 else
469 return -1;
470#else
471 return (_V6_ILP32_OFF32);
472#endif
473 case _SC_V6_ILP32_OFFBIG:
474#if _V6_ILP32_OFFBIG == 0
475 if (sizeof(int) * CHAR_BIT == 32 &&
476 sizeof(int) == sizeof(long) &&
477 sizeof(long) == sizeof(void *) &&
478 sizeof(off_t) * CHAR_BIT >= 64)
479 return 1;
480 else
481 return -1;
482#else
483 return (_V6_ILP32_OFFBIG);
484#endif
485 case _SC_V6_LP64_OFF64:
486#if _V6_LP64_OFF64 == 0
487 if (sizeof(int) * CHAR_BIT == 32 &&
488 sizeof(long) * CHAR_BIT == 64 &&
489 sizeof(long) == sizeof(void *) &&
490 sizeof(void *) == sizeof(off_t))
491 return 1;
492 else
493 return -1;
494#else
495 return (_V6_LP64_OFF64);
496#endif
497 case _SC_V6_LPBIG_OFFBIG:
498#if _V6_LPBIG_OFFBIG == 0
499 if (sizeof(int) * CHAR_BIT >= 32 &&
500 sizeof(long) * CHAR_BIT >= 64 &&
501 sizeof(void *) * CHAR_BIT >= 64 &&
502 sizeof(off_t) * CHAR_BIT >= 64)
503 return 1;
504 else
505 return -1;
506#else
507 return (_V6_LPBIG_OFFBIG);
508#endif
509 case _SC_ATEXIT_MAX:
510 return (ATEXIT_SIZE);
511 case _SC_IOV_MAX:
512 mib[0] = CTL_KERN;
513 mib[1] = KERN_IOV_MAX;
514 break;
515 case _SC_XOPEN_CRYPT:
516 return (_XOPEN_CRYPT);
517 case _SC_XOPEN_ENH_I18N:
518 return (_XOPEN_ENH_I18N);
519 case _SC_XOPEN_LEGACY:
520 return (_XOPEN_LEGACY);
521 case _SC_XOPEN_REALTIME:
522#if _XOPEN_REALTIME == 0
523 sverrno = errno;
524 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 &&
525 sysconf(_SC_MEMLOCK) > 0 &&
526 sysconf(_SC_MEMLOCK_RANGE) > 0 &&
527 sysconf(_SC_MESSAGE_PASSING) > 0 &&
528 sysconf(_SC_PRIORITY_SCHEDULING) > 0 &&
529 sysconf(_SC_REALTIME_SIGNALS) > 0 &&
530 sysconf(_SC_SEMAPHORES) > 0 &&
531 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 &&
532 sysconf(_SC_SYNCHRONIZED_IO) > 0 &&
533 sysconf(_SC_TIMERS) > 0;
534 errno = sverrno;
535 if (value)
536 return (200112L);
537 else
538 return (-1);
539#else
540 return (_XOPEN_REALTIME);
541#endif
542 case _SC_XOPEN_REALTIME_THREADS:
543#if _XOPEN_REALTIME_THREADS == 0
544#error "_XOPEN_REALTIME_THREADS"
545#else
546 return (_XOPEN_REALTIME_THREADS);
547#endif
548 case _SC_XOPEN_SHM:
549 len = sizeof(lvalue);
550 sverrno = errno;
551 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL,
552 0) == -1) {
553 errno = sverrno;
554 return (-1);
555 }
556 errno = sverrno;
557 return (1);
558 case _SC_XOPEN_STREAMS:
559 return (_XOPEN_STREAMS);
560 case _SC_XOPEN_UNIX:
561 return (_XOPEN_UNIX);
562#ifdef _XOPEN_VERSION
563 case _SC_XOPEN_VERSION:
564 return (_XOPEN_VERSION);
565#endif
566#ifdef _XOPEN_XCU_VERSION
567 case _SC_XOPEN_XCU_VERSION:
568 return (_XOPEN_XCU_VERSION);
569#endif
570 case _SC_SYMLOOP_MAX:
571 return (MAXSYMLINKS);
572 case _SC_RAW_SOCKETS:
573 return (_POSIX_RAW_SOCKETS);
574 case _SC_IPV6:
575#if _POSIX_IPV6 == 0
576 sverrno = errno;
577 value = socket(PF_INET6, SOCK_DGRAM, 0);
578 errno = sverrno;
579 if (value >= 0) {
580 close(value);
581 return (200112L);
582 } else
583 return (0);
584#else
585 return (_POSIX_IPV6);
586#endif
587
588 case _SC_NPROCESSORS_CONF:
589 case _SC_NPROCESSORS_ONLN:
590 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0)
591 return ((long)value);
592 mib[0] = CTL_HW;
593 mib[1] = HW_NCPU;
594 break;
595
596#ifdef _SC_PHYS_PAGES
597 case _SC_PHYS_PAGES:
598 len = sizeof(lvalue);
599 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1)
600 return (-1);
601 return (lvalue);
602#endif
603
604#ifdef _SC_CPUSET_SIZE
605 case _SC_CPUSET_SIZE:
606 len = sizeof(value);
607 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL,
608 0) == -1)
609 return (-1);
610 return ((long)value);
611#endif
612
613 default:
614 errno = EINVAL;
615 return (-1);
616 }
617 len = sizeof(value);
618 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
619 value = -1;
620 return ((long)value);
621}
| 363#ifdef notdef
364 case _SC_FILE_LOCKING:
365 /*
366 * XXX - The standard doesn't tell us how to define
367 * _POSIX_FILE_LOCKING, so we can't answer this one.
368 */
369#endif
370#if _POSIX_THREAD_SAFE_FUNCTIONS > -1
371 case _SC_GETGR_R_SIZE_MAX:
372 case _SC_GETPW_R_SIZE_MAX:
373#error "somebody needs to implement this"
374#endif
375 case _SC_HOST_NAME_MAX:
376 return (MAXHOSTNAMELEN - 1); /* does not include \0 */
377 case _SC_LOGIN_NAME_MAX:
378 return (MAXLOGNAME);
379 case _SC_MONOTONIC_CLOCK:
380#if _POSIX_MONOTONIC_CLOCK == 0
381#error "_POSIX_MONOTONIC_CLOCK"
382#else
383 return (_POSIX_MONOTONIC_CLOCK);
384#endif
385#if _POSIX_MESSAGE_PASSING > -1
386 case _SC_MQ_PRIO_MAX:
387 return (MQ_PRIO_MAX);
388#endif
389 case _SC_READER_WRITER_LOCKS:
390 return (_POSIX_READER_WRITER_LOCKS);
391 case _SC_REGEXP:
392 return (_POSIX_REGEXP);
393 case _SC_SHELL:
394 return (_POSIX_SHELL);
395 case _SC_SPAWN:
396 return (_POSIX_SPAWN);
397 case _SC_SPIN_LOCKS:
398 return (_POSIX_SPIN_LOCKS);
399 case _SC_SPORADIC_SERVER:
400#if _POSIX_SPORADIC_SERVER == 0
401#error "_POSIX_SPORADIC_SERVER"
402#else
403 return (_POSIX_SPORADIC_SERVER);
404#endif
405 case _SC_THREAD_ATTR_STACKADDR:
406 return (_POSIX_THREAD_ATTR_STACKADDR);
407 case _SC_THREAD_ATTR_STACKSIZE:
408 return (_POSIX_THREAD_ATTR_STACKSIZE);
409 case _SC_THREAD_CPUTIME:
410 return (_POSIX_THREAD_CPUTIME);
411 case _SC_THREAD_DESTRUCTOR_ITERATIONS:
412 return (PTHREAD_DESTRUCTOR_ITERATIONS);
413 case _SC_THREAD_KEYS_MAX:
414 return (PTHREAD_KEYS_MAX);
415 case _SC_THREAD_PRIO_INHERIT:
416 return (_POSIX_THREAD_PRIO_INHERIT);
417 case _SC_THREAD_PRIO_PROTECT:
418 return (_POSIX_THREAD_PRIO_PROTECT);
419 case _SC_THREAD_PRIORITY_SCHEDULING:
420 return (_POSIX_THREAD_PRIORITY_SCHEDULING);
421 case _SC_THREAD_PROCESS_SHARED:
422 return (_POSIX_THREAD_PROCESS_SHARED);
423 case _SC_THREAD_SAFE_FUNCTIONS:
424 return (_POSIX_THREAD_SAFE_FUNCTIONS);
425 case _SC_THREAD_STACK_MIN:
426 return (PTHREAD_STACK_MIN);
427 case _SC_THREAD_THREADS_MAX:
428 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */
429 case _SC_TIMEOUTS:
430 return (_POSIX_TIMEOUTS);
431 case _SC_THREADS:
432 return (_POSIX_THREADS);
433 case _SC_TRACE:
434#if _POSIX_TRACE == 0
435#error "_POSIX_TRACE"
436 /* While you're implementing this, also do the ones below. */
437#else
438 return (_POSIX_TRACE);
439#endif
440#if _POSIX_TRACE > -1
441 case _SC_TRACE_EVENT_FILTER:
442 return (_POSIX_TRACE_EVENT_FILTER);
443 case _SC_TRACE_INHERIT:
444 return (_POSIX_TRACE_INHERIT);
445 case _SC_TRACE_LOG:
446 return (_POSIX_TRACE_LOG);
447#endif
448 case _SC_TTY_NAME_MAX:
449 path = _PATH_DEV;
450 goto do_NAME_MAX;
451 case _SC_TYPED_MEMORY_OBJECTS:
452#if _POSIX_TYPED_MEMORY_OBJECTS == 0
453#error "_POSIX_TYPED_MEMORY_OBJECTS"
454#else
455 return (_POSIX_TYPED_MEMORY_OBJECTS);
456#endif
457 case _SC_V6_ILP32_OFF32:
458#if _V6_ILP32_OFF32 == 0
459 if (sizeof(int) * CHAR_BIT == 32 &&
460 sizeof(int) == sizeof(long) &&
461 sizeof(long) == sizeof(void *) &&
462 sizeof(void *) == sizeof(off_t))
463 return 1;
464 else
465 return -1;
466#else
467 return (_V6_ILP32_OFF32);
468#endif
469 case _SC_V6_ILP32_OFFBIG:
470#if _V6_ILP32_OFFBIG == 0
471 if (sizeof(int) * CHAR_BIT == 32 &&
472 sizeof(int) == sizeof(long) &&
473 sizeof(long) == sizeof(void *) &&
474 sizeof(off_t) * CHAR_BIT >= 64)
475 return 1;
476 else
477 return -1;
478#else
479 return (_V6_ILP32_OFFBIG);
480#endif
481 case _SC_V6_LP64_OFF64:
482#if _V6_LP64_OFF64 == 0
483 if (sizeof(int) * CHAR_BIT == 32 &&
484 sizeof(long) * CHAR_BIT == 64 &&
485 sizeof(long) == sizeof(void *) &&
486 sizeof(void *) == sizeof(off_t))
487 return 1;
488 else
489 return -1;
490#else
491 return (_V6_LP64_OFF64);
492#endif
493 case _SC_V6_LPBIG_OFFBIG:
494#if _V6_LPBIG_OFFBIG == 0
495 if (sizeof(int) * CHAR_BIT >= 32 &&
496 sizeof(long) * CHAR_BIT >= 64 &&
497 sizeof(void *) * CHAR_BIT >= 64 &&
498 sizeof(off_t) * CHAR_BIT >= 64)
499 return 1;
500 else
501 return -1;
502#else
503 return (_V6_LPBIG_OFFBIG);
504#endif
505 case _SC_ATEXIT_MAX:
506 return (ATEXIT_SIZE);
507 case _SC_IOV_MAX:
508 mib[0] = CTL_KERN;
509 mib[1] = KERN_IOV_MAX;
510 break;
511 case _SC_XOPEN_CRYPT:
512 return (_XOPEN_CRYPT);
513 case _SC_XOPEN_ENH_I18N:
514 return (_XOPEN_ENH_I18N);
515 case _SC_XOPEN_LEGACY:
516 return (_XOPEN_LEGACY);
517 case _SC_XOPEN_REALTIME:
518#if _XOPEN_REALTIME == 0
519 sverrno = errno;
520 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 &&
521 sysconf(_SC_MEMLOCK) > 0 &&
522 sysconf(_SC_MEMLOCK_RANGE) > 0 &&
523 sysconf(_SC_MESSAGE_PASSING) > 0 &&
524 sysconf(_SC_PRIORITY_SCHEDULING) > 0 &&
525 sysconf(_SC_REALTIME_SIGNALS) > 0 &&
526 sysconf(_SC_SEMAPHORES) > 0 &&
527 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 &&
528 sysconf(_SC_SYNCHRONIZED_IO) > 0 &&
529 sysconf(_SC_TIMERS) > 0;
530 errno = sverrno;
531 if (value)
532 return (200112L);
533 else
534 return (-1);
535#else
536 return (_XOPEN_REALTIME);
537#endif
538 case _SC_XOPEN_REALTIME_THREADS:
539#if _XOPEN_REALTIME_THREADS == 0
540#error "_XOPEN_REALTIME_THREADS"
541#else
542 return (_XOPEN_REALTIME_THREADS);
543#endif
544 case _SC_XOPEN_SHM:
545 len = sizeof(lvalue);
546 sverrno = errno;
547 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL,
548 0) == -1) {
549 errno = sverrno;
550 return (-1);
551 }
552 errno = sverrno;
553 return (1);
554 case _SC_XOPEN_STREAMS:
555 return (_XOPEN_STREAMS);
556 case _SC_XOPEN_UNIX:
557 return (_XOPEN_UNIX);
558#ifdef _XOPEN_VERSION
559 case _SC_XOPEN_VERSION:
560 return (_XOPEN_VERSION);
561#endif
562#ifdef _XOPEN_XCU_VERSION
563 case _SC_XOPEN_XCU_VERSION:
564 return (_XOPEN_XCU_VERSION);
565#endif
566 case _SC_SYMLOOP_MAX:
567 return (MAXSYMLINKS);
568 case _SC_RAW_SOCKETS:
569 return (_POSIX_RAW_SOCKETS);
570 case _SC_IPV6:
571#if _POSIX_IPV6 == 0
572 sverrno = errno;
573 value = socket(PF_INET6, SOCK_DGRAM, 0);
574 errno = sverrno;
575 if (value >= 0) {
576 close(value);
577 return (200112L);
578 } else
579 return (0);
580#else
581 return (_POSIX_IPV6);
582#endif
583
584 case _SC_NPROCESSORS_CONF:
585 case _SC_NPROCESSORS_ONLN:
586 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0)
587 return ((long)value);
588 mib[0] = CTL_HW;
589 mib[1] = HW_NCPU;
590 break;
591
592#ifdef _SC_PHYS_PAGES
593 case _SC_PHYS_PAGES:
594 len = sizeof(lvalue);
595 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1)
596 return (-1);
597 return (lvalue);
598#endif
599
600#ifdef _SC_CPUSET_SIZE
601 case _SC_CPUSET_SIZE:
602 len = sizeof(value);
603 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL,
604 0) == -1)
605 return (-1);
606 return ((long)value);
607#endif
608
609 default:
610 errno = EINVAL;
611 return (-1);
612 }
613 len = sizeof(value);
614 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
615 value = -1;
616 return ((long)value);
617}
|