1 | /* Copyright (C) 1991-2022 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, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <grp.h> |
20 | #include <pwd.h> |
21 | #include <stdio.h> |
22 | #include <unistd.h> |
23 | #include <time.h> |
24 | #include <limits.h> |
25 | #include <sys/param.h> |
26 | #include <sys/sysinfo.h> |
27 | |
28 | |
29 | /* Get the value of the system variable NAME. */ |
30 | long int |
31 | __sysconf (int name) |
32 | { |
33 | switch (name) |
34 | { |
35 | default: |
36 | __set_errno (EINVAL); |
37 | return -1; |
38 | |
39 | case _SC_TZNAME_MAX: |
40 | return -1; |
41 | |
42 | case _SC_CHARCLASS_NAME_MAX: |
43 | #ifdef CHARCLASS_NAME_MAX |
44 | return CHARCLASS_NAME_MAX; |
45 | #else |
46 | return -1; |
47 | #endif |
48 | |
49 | case _SC_COLL_WEIGHTS_MAX: |
50 | #ifdef COLL_WEIGHTS_MAX |
51 | return COLL_WEIGHTS_MAX; |
52 | #else |
53 | return -1; |
54 | #endif |
55 | |
56 | case _SC_EQUIV_CLASS_MAX: |
57 | #ifdef EQUIV_CLASS_MAX |
58 | return EQUIV_CLASS_MAX; |
59 | #else |
60 | return -1; |
61 | #endif |
62 | |
63 | case _SC_2_LOCALEDEF: |
64 | #ifdef _POSIX2_LOCALEDEF |
65 | return _POSIX2_LOCALEDEF; |
66 | #else |
67 | return -1; |
68 | #endif |
69 | |
70 | case _SC_NPROCESSORS_CONF: |
71 | return __get_nprocs_conf (); |
72 | |
73 | case _SC_NPROCESSORS_ONLN: |
74 | return __get_nprocs (); |
75 | |
76 | case _SC_PHYS_PAGES: |
77 | return __get_phys_pages (); |
78 | |
79 | case _SC_AVPHYS_PAGES: |
80 | return __get_avphys_pages (); |
81 | |
82 | case _SC_ATEXIT_MAX: |
83 | /* We have no limit since we use lists. */ |
84 | return INT_MAX; |
85 | |
86 | case _SC_PASS_MAX: |
87 | /* We have no limit but since the return value might be used to |
88 | allocate a buffer we restrict the value. */ |
89 | return BUFSIZ; |
90 | |
91 | case _SC_CHAR_BIT: |
92 | return CHAR_BIT; |
93 | |
94 | case _SC_CHAR_MAX: |
95 | return CHAR_MAX; |
96 | |
97 | case _SC_CHAR_MIN: |
98 | return CHAR_MIN; |
99 | |
100 | case _SC_INT_MAX: |
101 | return INT_MAX; |
102 | |
103 | case _SC_INT_MIN: |
104 | return INT_MIN; |
105 | |
106 | case _SC_LONG_BIT: |
107 | return sizeof (long int) * CHAR_BIT; |
108 | |
109 | case _SC_WORD_BIT: |
110 | return sizeof (int) * CHAR_BIT; |
111 | |
112 | case _SC_MB_LEN_MAX: |
113 | return MB_LEN_MAX; |
114 | |
115 | case _SC_NZERO: |
116 | return NZERO; |
117 | |
118 | case _SC_SSIZE_MAX: |
119 | return _POSIX_SSIZE_MAX; |
120 | |
121 | case _SC_SCHAR_MAX: |
122 | return SCHAR_MAX; |
123 | |
124 | case _SC_SCHAR_MIN: |
125 | return SCHAR_MIN; |
126 | |
127 | case _SC_SHRT_MAX: |
128 | return SHRT_MAX; |
129 | |
130 | case _SC_SHRT_MIN: |
131 | return SHRT_MIN; |
132 | |
133 | case _SC_UCHAR_MAX: |
134 | return UCHAR_MAX; |
135 | |
136 | case _SC_UINT_MAX: |
137 | return UINT_MAX; |
138 | |
139 | case _SC_ULONG_MAX: |
140 | return ULONG_MAX; |
141 | |
142 | case _SC_USHRT_MAX: |
143 | return USHRT_MAX; |
144 | |
145 | case _SC_GETGR_R_SIZE_MAX: |
146 | return NSS_BUFLEN_GROUP; |
147 | |
148 | case _SC_GETPW_R_SIZE_MAX: |
149 | return NSS_BUFLEN_PASSWD; |
150 | |
151 | case _SC_ARG_MAX: |
152 | case _SC_CHILD_MAX: |
153 | case _SC_CLK_TCK: |
154 | case _SC_NGROUPS_MAX: |
155 | case _SC_OPEN_MAX: |
156 | case _SC_STREAM_MAX: |
157 | case _SC_JOB_CONTROL: |
158 | case _SC_SAVED_IDS: |
159 | case _SC_REALTIME_SIGNALS: |
160 | case _SC_PRIORITY_SCHEDULING: |
161 | case _SC_TIMERS: |
162 | case _SC_ASYNCHRONOUS_IO: |
163 | case _SC_PRIORITIZED_IO: |
164 | case _SC_SYNCHRONIZED_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_SEMAPHORES: |
172 | case _SC_SHARED_MEMORY_OBJECTS: |
173 | |
174 | case _SC_AIO_LISTIO_MAX: |
175 | case _SC_AIO_MAX: |
176 | case _SC_AIO_PRIO_DELTA_MAX: |
177 | case _SC_DELAYTIMER_MAX: |
178 | case _SC_MQ_OPEN_MAX: |
179 | case _SC_MQ_PRIO_MAX: |
180 | case _SC_VERSION: |
181 | case _SC_PAGESIZE: |
182 | case _SC_RTSIG_MAX: |
183 | case _SC_SEM_NSEMS_MAX: |
184 | case _SC_SEM_VALUE_MAX: |
185 | case _SC_SIGQUEUE_MAX: |
186 | case _SC_TIMER_MAX: |
187 | |
188 | case _SC_PII: |
189 | case _SC_PII_XTI: |
190 | case _SC_PII_SOCKET: |
191 | case _SC_PII_OSI: |
192 | case _SC_POLL: |
193 | case _SC_SELECT: |
194 | case _SC_UIO_MAXIOV: |
195 | case _SC_PII_INTERNET_STREAM: |
196 | case _SC_PII_INTERNET_DGRAM: |
197 | case _SC_PII_OSI_COTS: |
198 | case _SC_PII_OSI_CLTS: |
199 | case _SC_PII_OSI_M: |
200 | case _SC_T_IOV_MAX: |
201 | |
202 | case _SC_BC_BASE_MAX: |
203 | case _SC_BC_DIM_MAX: |
204 | case _SC_BC_SCALE_MAX: |
205 | case _SC_BC_STRING_MAX: |
206 | case _SC_EXPR_NEST_MAX: |
207 | case _SC_LINE_MAX: |
208 | case _SC_RE_DUP_MAX: |
209 | case _SC_2_VERSION: |
210 | case _SC_2_C_BIND: |
211 | case _SC_2_C_DEV: |
212 | case _SC_2_FORT_DEV: |
213 | case _SC_2_SW_DEV: |
214 | case _SC_2_CHAR_TERM: |
215 | case _SC_2_C_VERSION: |
216 | case _SC_2_UPE: |
217 | |
218 | case _SC_THREADS: |
219 | case _SC_THREAD_SAFE_FUNCTIONS: |
220 | case _SC_LOGIN_NAME_MAX: |
221 | case _SC_TTY_NAME_MAX: |
222 | case _SC_THREAD_DESTRUCTOR_ITERATIONS: |
223 | case _SC_THREAD_KEYS_MAX: |
224 | case _SC_THREAD_STACK_MIN: |
225 | case _SC_THREAD_THREADS_MAX: |
226 | case _SC_THREAD_ATTR_STACKADDR: |
227 | case _SC_THREAD_ATTR_STACKSIZE: |
228 | case _SC_THREAD_PRIORITY_SCHEDULING: |
229 | case _SC_THREAD_PRIO_INHERIT: |
230 | case _SC_THREAD_PRIO_PROTECT: |
231 | case _SC_THREAD_PROCESS_SHARED: |
232 | |
233 | case _SC_XOPEN_VERSION: |
234 | case _SC_XOPEN_XCU_VERSION: |
235 | case _SC_XOPEN_UNIX: |
236 | case _SC_XOPEN_CRYPT: |
237 | case _SC_XOPEN_ENH_I18N: |
238 | case _SC_XOPEN_SHM: |
239 | case _SC_XOPEN_XPG2: |
240 | case _SC_XOPEN_XPG3: |
241 | case _SC_XOPEN_XPG4: |
242 | |
243 | case _SC_NL_ARGMAX: |
244 | case _SC_NL_LANGMAX: |
245 | case _SC_NL_MSGMAX: |
246 | case _SC_NL_NMAX: |
247 | case _SC_NL_SETMAX: |
248 | case _SC_NL_TEXTMAX: |
249 | |
250 | case _SC_XBS5_ILP32_OFF32: |
251 | case _SC_XBS5_ILP32_OFFBIG: |
252 | case _SC_XBS5_LP64_OFF64: |
253 | case _SC_XBS5_LPBIG_OFFBIG: |
254 | |
255 | case _SC_POSIX_V6_ILP32_OFF32: |
256 | case _SC_POSIX_V6_ILP32_OFFBIG: |
257 | case _SC_POSIX_V6_LP64_OFF64: |
258 | case _SC_POSIX_V6_LPBIG_OFFBIG: |
259 | |
260 | case _SC_POSIX_V7_ILP32_OFF32: |
261 | case _SC_POSIX_V7_ILP32_OFFBIG: |
262 | case _SC_POSIX_V7_LP64_OFF64: |
263 | case _SC_POSIX_V7_LPBIG_OFFBIG: |
264 | |
265 | case _SC_XOPEN_LEGACY: |
266 | case _SC_XOPEN_REALTIME: |
267 | case _SC_XOPEN_REALTIME_THREADS: |
268 | |
269 | case _SC_MINSIGSTKSZ: |
270 | case _SC_SIGSTKSZ: |
271 | |
272 | break; |
273 | } |
274 | |
275 | __set_errno (ENOSYS); |
276 | return -1; |
277 | } |
278 | |
279 | weak_alias (__sysconf, sysconf) |
280 | libc_hidden_def (__sysconf) |
281 | |
282 | stub_warning (sysconf) |
283 |