4 #include <sys/resource.h>
12 #define RLIM(x) (-32768|(RLIMIT_ ## x))
14 long sysconf(int name)
16 static const short values[] = {
17 [_SC_ARG_MAX] = OFLOW,
18 [_SC_CHILD_MAX] = RLIM(NPROC),
20 [_SC_NGROUPS_MAX] = 32,
21 [_SC_OPEN_MAX] = RLIM(NOFILE),
22 [_SC_STREAM_MAX] = -1,
23 [_SC_TZNAME_MAX] = TZNAME_MAX,
24 [_SC_JOB_CONTROL] = 1,
26 [_SC_REALTIME_SIGNALS] = 1,
27 [_SC_PRIORITY_SCHEDULING] = -1,
29 [_SC_ASYNCHRONOUS_IO] = VER,
30 [_SC_PRIORITIZED_IO] = -1,
31 [_SC_SYNCHRONIZED_IO] = -1,
33 [_SC_MAPPED_FILES] = VER,
35 [_SC_MEMLOCK_RANGE] = VER,
36 [_SC_MEMORY_PROTECTION] = VER,
37 [_SC_MESSAGE_PASSING] = VER,
38 [_SC_SEMAPHORES] = VER,
39 [_SC_SHARED_MEMORY_OBJECTS] = VER,
40 [_SC_AIO_LISTIO_MAX] = -1,
42 [_SC_AIO_PRIO_DELTA_MAX] = 0, /* ?? */
43 [_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX,
44 [_SC_MQ_OPEN_MAX] = -1,
45 [_SC_MQ_PRIO_MAX] = OFLOW,
47 [_SC_PAGE_SIZE] = OFLOW,
48 [_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3,
49 [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
50 [_SC_SEM_VALUE_MAX] = OFLOW,
51 [_SC_SIGQUEUE_MAX] = -1,
53 [_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
54 [_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX,
55 [_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX,
56 [_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX,
57 [_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX,
58 [_SC_EQUIV_CLASS_MAX] = -1, /* ?? */
59 [_SC_EXPR_NEST_MAX] = -1,
61 [_SC_RE_DUP_MAX] = RE_DUP_MAX,
62 [_SC_CHARCLASS_NAME_MAX] = -1, /* ?? */
63 [_SC_2_VERSION] = VER,
66 [_SC_2_FORT_DEV] = -1,
67 [_SC_2_FORT_RUN] = -1,
69 [_SC_2_LOCALEDEF] = -1,
70 [_SC_PII] = -1, /* ????????? */
72 [_SC_PII_SOCKET] = -1,
73 [_SC_PII_INTERNET] = -1,
77 [_SC_IOV_MAX] = IOV_MAX,
78 [_SC_PII_INTERNET_STREAM] = -1,
79 [_SC_PII_INTERNET_DGRAM] = -1,
80 [_SC_PII_OSI_COTS] = -1,
81 [_SC_PII_OSI_CLTS] = -1,
85 [_SC_THREAD_SAFE_FUNCTIONS] = VER,
86 [_SC_GETGR_R_SIZE_MAX] = -1,
87 [_SC_GETPW_R_SIZE_MAX] = -1,
88 [_SC_LOGIN_NAME_MAX] = 256,
89 [_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
90 [_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS,
91 [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
92 [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
93 [_SC_THREAD_THREADS_MAX] = -1,
94 [_SC_THREAD_ATTR_STACKADDR] = VER,
95 [_SC_THREAD_ATTR_STACKSIZE] = VER,
96 [_SC_THREAD_PRIORITY_SCHEDULING] = VER,
97 [_SC_THREAD_PRIO_INHERIT] = -1,
98 [_SC_THREAD_PRIO_PROTECT] = -1,
99 [_SC_THREAD_PROCESS_SHARED] = VER,
100 [_SC_NPROCESSORS_CONF] = CPUCNT,
101 [_SC_NPROCESSORS_ONLN] = CPUCNT,
102 [_SC_PHYS_PAGES] = -1,
103 [_SC_AVPHYS_PAGES] = -1,
104 [_SC_ATEXIT_MAX] = -1,
106 [_SC_XOPEN_VERSION] = _XOPEN_VERSION,
107 [_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION,
108 [_SC_XOPEN_UNIX] = 1,
109 [_SC_XOPEN_CRYPT] = -1,
110 [_SC_XOPEN_ENH_I18N] = 1,
112 [_SC_2_CHAR_TERM] = -1,
113 [_SC_2_C_VERSION] = -1,
115 [_SC_XOPEN_XPG2] = -1,
116 [_SC_XOPEN_XPG3] = -1,
117 [_SC_XOPEN_XPG4] = -1,
125 [_SC_MB_LEN_MAX] = -1,
127 [_SC_SSIZE_MAX] = -1,
128 [_SC_SCHAR_MAX] = -1,
129 [_SC_SCHAR_MIN] = -1,
132 [_SC_UCHAR_MAX] = -1,
134 [_SC_ULONG_MAX] = -1,
135 [_SC_USHRT_MAX] = -1,
136 [_SC_NL_ARGMAX] = -1,
137 [_SC_NL_LANGMAX] = -1,
138 [_SC_NL_MSGMAX] = -1,
140 [_SC_NL_SETMAX] = -1,
141 [_SC_NL_TEXTMAX] = -1,
142 [_SC_XBS5_ILP32_OFF32] = -1,
143 [_SC_XBS5_ILP32_OFFBIG] = 2*(sizeof(long)==4)-1,
144 [_SC_XBS5_LP64_OFF64] = 2*(sizeof(long)==8)-1,
145 [_SC_XBS5_LPBIG_OFFBIG] = -1,
146 [_SC_XOPEN_LEGACY] = -1,
147 [_SC_XOPEN_REALTIME] = -1,
148 [_SC_XOPEN_REALTIME_THREADS] = -1,
149 [_SC_ADVISORY_INFO] = VER,
150 [_SC_BARRIERS] = VER,
152 [_SC_C_LANG_SUPPORT] = -1,
153 [_SC_C_LANG_SUPPORT_R] = -1,
154 [_SC_CLOCK_SELECTION] = VER,
156 [_SC_THREAD_CPUTIME] = VER,
157 [_SC_DEVICE_IO] = -1,
158 [_SC_DEVICE_SPECIFIC] = -1,
159 [_SC_DEVICE_SPECIFIC_R] = -1,
163 [_SC_FILE_ATTRIBUTES] = -1,
164 [_SC_FILE_LOCKING] = -1,
165 [_SC_FILE_SYSTEM] = -1,
166 [_SC_MONOTONIC_CLOCK] = VER,
167 [_SC_MULTI_PROCESS] = -1,
168 [_SC_SINGLE_PROCESS] = -1,
169 [_SC_NETWORKING] = -1,
170 [_SC_READER_WRITER_LOCKS] = VER,
171 [_SC_SPIN_LOCKS] = VER,
173 [_SC_REGEX_VERSION] = -1,
177 [_SC_SPORADIC_SERVER] = -1,
178 [_SC_THREAD_SPORADIC_SERVER] = -1,
179 [_SC_SYSTEM_DATABASE] = -1,
180 [_SC_SYSTEM_DATABASE_R] = -1,
181 [_SC_TIMEOUTS] = VER,
182 [_SC_TYPED_MEMORY_OBJECTS] = -1,
183 [_SC_USER_GROUPS] = -1,
184 [_SC_USER_GROUPS_R] = -1,
186 [_SC_2_PBS_ACCOUNTING] = -1,
187 [_SC_2_PBS_LOCATE] = -1,
188 [_SC_2_PBS_MESSAGE] = -1,
189 [_SC_2_PBS_TRACK] = -1,
190 [_SC_SYMLOOP_MAX] = SYMLOOP_MAX,
192 [_SC_2_PBS_CHECKPOINT] = -1,
193 [_SC_V6_ILP32_OFF32] = -1,
194 [_SC_V6_ILP32_OFFBIG] = 2*(sizeof(long)==4)-1,
195 [_SC_V6_LP64_OFF64] = 2*(sizeof(long)==8)-1,
196 [_SC_V6_LPBIG_OFFBIG] = -1,
197 [_SC_HOST_NAME_MAX] = HOST_NAME_MAX,
199 [_SC_TRACE_EVENT_FILTER] = -1,
200 [_SC_TRACE_INHERIT] = -1,
201 [_SC_TRACE_LOG] = -1,
204 [_SC_RAW_SOCKETS] = VER,
205 [_SC_V7_ILP32_OFF32] = -1,
206 [_SC_V7_ILP32_OFFBIG] = 2*(sizeof(long)==4)-1,
207 [_SC_V7_LP64_OFF64] = 2*(sizeof(long)==8)-1,
208 [_SC_V7_LPBIG_OFFBIG] = -1,
209 [_SC_SS_REPL_MAX] = -1,
210 [_SC_TRACE_EVENT_NAME_MAX] = -1,
211 [_SC_TRACE_NAME_MAX] = -1,
212 [_SC_TRACE_SYS_MAX] = -1,
213 [_SC_TRACE_USER_EVENT_MAX] = -1,
214 [_SC_XOPEN_STREAMS] = 0,
215 [_SC_THREAD_ROBUST_PRIO_INHERIT] = -1,
216 [_SC_THREAD_ROBUST_PRIO_PROTECT] = -1,
218 if (name > sizeof(values)/sizeof(values[0])) {
221 } else if (values[name] == VER) {
222 return _POSIX_VERSION;
223 } else if (values[name] == OFLOW) {
224 if (name == _SC_ARG_MAX) return ARG_MAX;
225 if (name == _SC_SEM_VALUE_MAX) return SEM_VALUE_MAX;
226 if (name == _SC_MQ_PRIO_MAX) return MQ_PRIO_MAX;
227 /* name == _SC_PAGE_SIZE */
229 } else if (values[name] == CPUCNT) {
230 unsigned char set[128] = {1};
232 __syscall(SYS_sched_getaffinity, 0, sizeof set, set);
233 for (i=cnt=0; i<sizeof set; i++)
234 for (; set[i]; set[i]&=set[i]-1, cnt++);
236 } else if (values[name] < OFLOW) {
238 __syscall(SYS_getrlimit, values[name]&16383, lim);
239 return lim[0] < 0 ? LONG_MAX : lim[0];