1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 #include <sys/cdefs.h> 32 33 /** sysconf() query for the maximum number of bytes of exec() arguments. */ 34 #define _SC_ARG_MAX 0x0000 35 /** sysconf() query for bc(1) behavior equivalent to _POSIX2_BC_BASE_MAX. */ 36 #define _SC_BC_BASE_MAX 0x0001 37 /** sysconf() query for bc(1) behavior equivalent to _POSIX2_BC_DIM_MAX. */ 38 #define _SC_BC_DIM_MAX 0x0002 39 /** sysconf() query for bc(1) behavior equivalent to _POSIX2_BC_SCALE_MAX. */ 40 #define _SC_BC_SCALE_MAX 0x0003 41 /** sysconf() query for bc(1) behavior equivalent to _POSIX2_BC_STRING_MAX. */ 42 #define _SC_BC_STRING_MAX 0x0004 43 /** sysconf() query equivalent to RLIMIT_NPROC. */ 44 #define _SC_CHILD_MAX 0x0005 45 /** sysconf() query equivalent to AT_CLKTCK. */ 46 #define _SC_CLK_TCK 0x0006 47 /** sysconf() query for collation behavior equivalent to _POSIX2_COLL_WEIGHTS_MAX. */ 48 #define _SC_COLL_WEIGHTS_MAX 0x0007 49 /** sysconf() query for expr(1) behavior equivalent to _POSIX2_EXPR_NEST_MAX. */ 50 #define _SC_EXPR_NEST_MAX 0x0008 51 /** sysconf() query for command-line tool behavior equivalent to _POSIX2_LINE_MAX. */ 52 #define _SC_LINE_MAX 0x0009 53 /** sysconf() query equivalent to NGROUPS_MAX. */ 54 #define _SC_NGROUPS_MAX 0x000a 55 /** sysconf() query equivalent to RLIMIT_NOFILE. */ 56 #define _SC_OPEN_MAX 0x000b 57 /** sysconf() query equivalent to PASS_MAX. */ 58 #define _SC_PASS_MAX 0x000c 59 /** sysconf() query equivalent to _POSIX2_C_BIND. */ 60 #define _SC_2_C_BIND 0x000d 61 /** sysconf() query equivalent to _POSIX2_C_DEV. */ 62 #define _SC_2_C_DEV 0x000e 63 /** Obsolescent in POSIX.1-2008. */ 64 #define _SC_2_C_VERSION 0x000f 65 /** sysconf() query equivalent to _POSIX2_CHAR_TERM. */ 66 #define _SC_2_CHAR_TERM 0x0010 67 /** sysconf() query equivalent to _POSIX2_FORT_DEV. */ 68 #define _SC_2_FORT_DEV 0x0011 69 /** sysconf() query equivalent to _POSIX2_FORT_RUN. */ 70 #define _SC_2_FORT_RUN 0x0012 71 /** sysconf() query equivalent to _POSIX2_LOCALEDEF. */ 72 #define _SC_2_LOCALEDEF 0x0013 73 /** sysconf() query equivalent to _POSIX2_SW_DEV. */ 74 #define _SC_2_SW_DEV 0x0014 75 /** sysconf() query equivalent to _POSIX2_UPE. */ 76 #define _SC_2_UPE 0x0015 77 /** sysconf() query equivalent to _POSIX2_VERSION. */ 78 #define _SC_2_VERSION 0x0016 79 /** sysconf() query equivalent to _POSIX_JOB_CONTROL. */ 80 #define _SC_JOB_CONTROL 0x0017 81 /** sysconf() query equivalent to _POSIX_SAVED_IDS. */ 82 #define _SC_SAVED_IDS 0x0018 83 /** sysconf() query equivalent to _POSIX_VERSION. */ 84 #define _SC_VERSION 0x0019 85 /** sysconf() query equivalent to _POSIX_RE_DUP_MAX. */ 86 #define _SC_RE_DUP_MAX 0x001a 87 /** sysconf() query equivalent to FOPEN_MAX. */ 88 #define _SC_STREAM_MAX 0x001b 89 /** sysconf() query equivalent to _POSIX_TZNAME_MAX. */ 90 #define _SC_TZNAME_MAX 0x001c 91 /** sysconf() query equivalent to _XOPEN_CRYPT. */ 92 #define _SC_XOPEN_CRYPT 0x001d 93 /** sysconf() query equivalent to _XOPEN_ENH_I18N. */ 94 #define _SC_XOPEN_ENH_I18N 0x001e 95 /** sysconf() query equivalent to _XOPEN_SHM. */ 96 #define _SC_XOPEN_SHM 0x001f 97 /** sysconf() query equivalent to _XOPEN_VERSION. */ 98 #define _SC_XOPEN_VERSION 0x0020 99 /** Obsolescent in POSIX.1-2008. */ 100 #define _SC_XOPEN_XCU_VERSION 0x0021 101 /** sysconf() query equivalent to _XOPEN_REALTIME. */ 102 #define _SC_XOPEN_REALTIME 0x0022 103 /** sysconf() query equivalent to _XOPEN_REALTIME_THREADS. */ 104 #define _SC_XOPEN_REALTIME_THREADS 0x0023 105 /** sysconf() query equivalent to _XOPEN_LEGACY. */ 106 #define _SC_XOPEN_LEGACY 0x0024 107 /** sysconf() query for the maximum number of atexit() handlers. Unlimited on Android. */ 108 #define _SC_ATEXIT_MAX 0x0025 109 /** sysconf() query equivalent to IOV_MAX. */ 110 #define _SC_IOV_MAX 0x0026 111 /** Same as _SC_IOV_MAX. */ 112 #define _SC_UIO_MAXIOV _SC_IOV_MAX 113 /** Same as _SC_PAGE_SIZE. */ 114 #define _SC_PAGESIZE 0x0027 115 /** sysconf() query equivalent to getpagesize(). */ 116 #define _SC_PAGE_SIZE 0x0028 117 /** sysconf() query equivalent to _XOPEN_UNIX. */ 118 #define _SC_XOPEN_UNIX 0x0029 119 /** Obsolescent in POSIX.1-2008. */ 120 #define _SC_XBS5_ILP32_OFF32 0x002a 121 /** Obsolescent in POSIX.1-2008. */ 122 #define _SC_XBS5_ILP32_OFFBIG 0x002b 123 /** Obsolescent in POSIX.1-2008. */ 124 #define _SC_XBS5_LP64_OFF64 0x002c 125 /** Obsolescent in POSIX.1-2008. */ 126 #define _SC_XBS5_LPBIG_OFFBIG 0x002d 127 /** sysconf() query equivalent to _POSIX_AIO_LISTIO_MAX. */ 128 #define _SC_AIO_LISTIO_MAX 0x002e 129 /** sysconf() query equivalent to _POSIX_AIO_MAX. */ 130 #define _SC_AIO_MAX 0x002f 131 /** Unimplemented on Android. */ 132 #define _SC_AIO_PRIO_DELTA_MAX 0x0030 133 /** sysconf() query equivalent to _POSIX_DELAYTIMER_MAX. */ 134 #define _SC_DELAYTIMER_MAX 0x0031 135 /** sysconf() query equivalent to _POSIX_MQ_OPEN_MAX. */ 136 #define _SC_MQ_OPEN_MAX 0x0032 137 /** sysconf() query equivalent to _POSIX_MQ_PRIO_MAX. */ 138 #define _SC_MQ_PRIO_MAX 0x0033 139 /** sysconf() query equivalent to RTSIG_MAX. Constant on Android. */ 140 #define _SC_RTSIG_MAX 0x0034 141 /** sysconf() query equivalent to _POSIX_SEM_NSEMS_MAX. Constant on Android. */ 142 #define _SC_SEM_NSEMS_MAX 0x0035 143 /** sysconf() query equivalent to SEM_VALUE_MAX. Constant on Android. */ 144 #define _SC_SEM_VALUE_MAX 0x0036 145 /** sysconf() query equivalent to _POSIX_SIGQUEUE_MAX. */ 146 #define _SC_SIGQUEUE_MAX 0x0037 147 /** sysconf() query equivalent to _POSIX_TIMER_MAX. */ 148 #define _SC_TIMER_MAX 0x0038 149 /** sysconf() query equivalent to _POSIX_ASYNCHRONOUS_IO. */ 150 #define _SC_ASYNCHRONOUS_IO 0x0039 151 /** sysconf() query equivalent to _POSIX_FSYNC. */ 152 #define _SC_FSYNC 0x003a 153 /** sysconf() query equivalent to _POSIX_MAPPED_FILES. */ 154 #define _SC_MAPPED_FILES 0x003b 155 /** sysconf() query equivalent to _POSIX_MEMLOCK. */ 156 #define _SC_MEMLOCK 0x003c 157 /** sysconf() query equivalent to _POSIX_MEMLOCK_RANGE. */ 158 #define _SC_MEMLOCK_RANGE 0x003d 159 /** sysconf() query equivalent to _POSIX_MEMORY_PROTECTION. */ 160 #define _SC_MEMORY_PROTECTION 0x003e 161 /** sysconf() query equivalent to _POSIX_MESSAGE_PASSING. */ 162 #define _SC_MESSAGE_PASSING 0x003f 163 /** sysconf() query equivalent to _POSIX_PRIORITIZED_IO. */ 164 #define _SC_PRIORITIZED_IO 0x0040 165 /** sysconf() query equivalent to _POSIX_PRIORITY_SCHEDULING. */ 166 #define _SC_PRIORITY_SCHEDULING 0x0041 167 /** sysconf() query equivalent to _POSIX_REALTIME_SIGNALS. */ 168 #define _SC_REALTIME_SIGNALS 0x0042 169 /** sysconf() query equivalent to _POSIX_SEMAPHORES. */ 170 #define _SC_SEMAPHORES 0x0043 171 /** sysconf() query equivalent to _POSIX_SHARED_MEMORY_OBJECTS. */ 172 #define _SC_SHARED_MEMORY_OBJECTS 0x0044 173 /** sysconf() query equivalent to _POSIX_SYNCHRONIZED_IO. */ 174 #define _SC_SYNCHRONIZED_IO 0x0045 175 /** sysconf() query equivalent to _POSIX_TIMERS. */ 176 #define _SC_TIMERS 0x0046 177 /** sysconf() query for an initial size for getgrgid_r() and getgrnam_r() buffers. */ 178 #define _SC_GETGR_R_SIZE_MAX 0x0047 179 /** sysconf() query for an initial size for getpwuid_r() and getpwnam_r() buffers. */ 180 #define _SC_GETPW_R_SIZE_MAX 0x0048 181 /** sysconf() query equivalent to LOGIN_NAME_MAX. */ 182 #define _SC_LOGIN_NAME_MAX 0x0049 183 /** sysconf() query equivalent to PTHREAD_DESTRUCTOR_ITERATIONS. */ 184 #define _SC_THREAD_DESTRUCTOR_ITERATIONS 0x004a 185 /** sysconf() query equivalent to PTHREAD_KEYS_MAX. */ 186 #define _SC_THREAD_KEYS_MAX 0x004b 187 /** sysconf() query equivalent to PTHREAD_STACK_MIN. */ 188 #define _SC_THREAD_STACK_MIN 0x004c 189 /** sysconf() query for a maximum number of threads. Unlimited on Android. */ 190 #define _SC_THREAD_THREADS_MAX 0x004d 191 /** sysconf() query equivalent to TTY_NAME_MAX. */ 192 #define _SC_TTY_NAME_MAX 0x004e 193 /** sysconf() query equivalent to _POSIX_THREADS. */ 194 #define _SC_THREADS 0x004f 195 /** sysconf() query equivalent to _POSIX_THREAD_ATTR_STACKADDR. */ 196 #define _SC_THREAD_ATTR_STACKADDR 0x0050 197 /** sysconf() query equivalent to _POSIX_THREAD_ATTR_STACKSIZE. */ 198 #define _SC_THREAD_ATTR_STACKSIZE 0x0051 199 /** sysconf() query equivalent to _POSIX_THREAD_PRIORITY_SCHEDULING. */ 200 #define _SC_THREAD_PRIORITY_SCHEDULING 0x0052 201 /** sysconf() query equivalent to _POSIX_THREAD_PRIO_INHERIT. */ 202 #define _SC_THREAD_PRIO_INHERIT 0x0053 203 /** sysconf() query equivalent to _POSIX_THREAD_PRIO_PROTECT. */ 204 #define _SC_THREAD_PRIO_PROTECT 0x0054 205 /** sysconf() query equivalent to _POSIX_THREAD_SAFE_FUNCTIONS. */ 206 #define _SC_THREAD_SAFE_FUNCTIONS 0x0055 207 /** sysconf() query equivalent to get_nprocs_conf(). */ 208 #define _SC_NPROCESSORS_CONF 0x0060 209 /** sysconf() query equivalent to get_nprocs(). */ 210 #define _SC_NPROCESSORS_ONLN 0x0061 211 /** sysconf() query equivalent to get_phys_pages(). */ 212 #define _SC_PHYS_PAGES 0x0062 213 /** sysconf() query equivalent to get_avphys_pages(). */ 214 #define _SC_AVPHYS_PAGES 0x0063 215 /** sysconf() query equivalent to _POSIX_MONOTONIC_CLOCK. */ 216 #define _SC_MONOTONIC_CLOCK 0x0064 217 /** Obsolescent in POSIX.1-2008. */ 218 #define _SC_2_PBS 0x0065 219 /** Obsolescent in POSIX.1-2008. */ 220 #define _SC_2_PBS_ACCOUNTING 0x0066 221 /** Obsolescent in POSIX.1-2008. */ 222 #define _SC_2_PBS_CHECKPOINT 0x0067 223 /** Obsolescent in POSIX.1-2008. */ 224 #define _SC_2_PBS_LOCATE 0x0068 225 /** Obsolescent in POSIX.1-2008. */ 226 #define _SC_2_PBS_MESSAGE 0x0069 227 /** Obsolescent in POSIX.1-2008. */ 228 #define _SC_2_PBS_TRACK 0x006a 229 /** sysconf() query equivalent to _POSIX_ADVISORY_INFO. */ 230 #define _SC_ADVISORY_INFO 0x006b 231 /** sysconf() query equivalent to _POSIX_BARRIERS. */ 232 #define _SC_BARRIERS 0x006c 233 /** sysconf() query equivalent to _POSIX_CLOCK_SELECTION. */ 234 #define _SC_CLOCK_SELECTION 0x006d 235 /** sysconf() query equivalent to _POSIX_CPUTIME. */ 236 #define _SC_CPUTIME 0x006e 237 /** sysconf() query equivalent to _POSIX_HOST_NAME_MAX. */ 238 #define _SC_HOST_NAME_MAX 0x006f 239 /** sysconf() query equivalent to _POSIX_IPV6. */ 240 #define _SC_IPV6 0x0070 241 /** sysconf() query equivalent to _POSIX_RAW_SOCKETS. */ 242 #define _SC_RAW_SOCKETS 0x0071 243 /** sysconf() query equivalent to _POSIX_READER_WRITER_LOCKS. */ 244 #define _SC_READER_WRITER_LOCKS 0x0072 245 /** sysconf() query equivalent to _POSIX_REGEXP. */ 246 #define _SC_REGEXP 0x0073 247 /** sysconf() query equivalent to _POSIX_SHELL. */ 248 #define _SC_SHELL 0x0074 249 /** sysconf() query equivalent to _POSIX_SPAWN. */ 250 #define _SC_SPAWN 0x0075 251 /** sysconf() query equivalent to _POSIX_SPIN_LOCKS. */ 252 #define _SC_SPIN_LOCKS 0x0076 253 /** sysconf() query equivalent to _POSIX_SPORADIC_SERVER. */ 254 #define _SC_SPORADIC_SERVER 0x0077 255 /** sysconf() query equivalent to _POSIX_SS_REPL_MAX. */ 256 #define _SC_SS_REPL_MAX 0x0078 257 /** sysconf() query equivalent to _POSIX_SYMLOOP_MAX. */ 258 #define _SC_SYMLOOP_MAX 0x0079 259 /** sysconf() query equivalent to _POSIX_THREAD_CPUTIME. */ 260 #define _SC_THREAD_CPUTIME 0x007a 261 /** sysconf() query equivalent to _POSIX_THREAD_PROCESS_SHARED. */ 262 #define _SC_THREAD_PROCESS_SHARED 0x007b 263 /** sysconf() query equivalent to _POSIX_THREAD_ROBUST_PRIO_INHERIT. */ 264 #define _SC_THREAD_ROBUST_PRIO_INHERIT 0x007c 265 /** sysconf() query equivalent to _POSIX_THREAD_ROBUST_PRIO_PROTECT. */ 266 #define _SC_THREAD_ROBUST_PRIO_PROTECT 0x007d 267 /** sysconf() query equivalent to _POSIX_THREAD_SPORADIC_SERVER. */ 268 #define _SC_THREAD_SPORADIC_SERVER 0x007e 269 /** sysconf() query equivalent to _POSIX_TIMEOUTS. */ 270 #define _SC_TIMEOUTS 0x007f 271 /** Unimplemented. */ 272 #define _SC_TRACE 0x0080 273 /** Unimplemented. */ 274 #define _SC_TRACE_EVENT_FILTER 0x0081 275 /** Unimplemented. */ 276 #define _SC_TRACE_EVENT_NAME_MAX 0x0082 277 /** Unimplemented. */ 278 #define _SC_TRACE_INHERIT 0x0083 279 /** Unimplemented. */ 280 #define _SC_TRACE_LOG 0x0084 281 /** Unimplemented. */ 282 #define _SC_TRACE_NAME_MAX 0x0085 283 /** Unimplemented. */ 284 #define _SC_TRACE_SYS_MAX 0x0086 285 /** Unimplemented. */ 286 #define _SC_TRACE_USER_EVENT_MAX 0x0087 287 /** sysconf() query equivalent to _POSIX_TYPED_MEMORY_OBJECTS. */ 288 #define _SC_TYPED_MEMORY_OBJECTS 0x0088 289 /** sysconf() query equivalent to _POSIX_V7_ILP32_OFF32. */ 290 #define _SC_V7_ILP32_OFF32 0x0089 291 /** sysconf() query equivalent to _POSIX_V7_ILP32_OFFBIG. */ 292 #define _SC_V7_ILP32_OFFBIG 0x008a 293 /** sysconf() query equivalent to _POSIX_V7_ILP64_OFF64. */ 294 #define _SC_V7_LP64_OFF64 0x008b 295 /** sysconf() query equivalent to _POSIX_V7_ILP64_OFFBIG. */ 296 #define _SC_V7_LPBIG_OFFBIG 0x008c 297 /** Unimplemented. */ 298 #define _SC_XOPEN_STREAMS 0x008d 299 /** Meaningless in Android, unsupported in every other libc (but defined by POSIX). */ 300 #define _SC_XOPEN_UUCP 0x008e 301 /** sysconf() query for the L1 instruction cache size. Not available on all architectures. */ 302 #define _SC_LEVEL1_ICACHE_SIZE 0x008f 303 /** sysconf() query for the L1 instruction cache associativity. Not available on all architectures. */ 304 #define _SC_LEVEL1_ICACHE_ASSOC 0x0090 305 /** sysconf() query for the L1 instruction cache line size. Not available on all architectures. */ 306 #define _SC_LEVEL1_ICACHE_LINESIZE 0x0091 307 /** sysconf() query for the L1 data cache size. Not available on all architectures. */ 308 #define _SC_LEVEL1_DCACHE_SIZE 0x0092 309 /** sysconf() query for the L1 data cache associativity. Not available on all architectures. */ 310 #define _SC_LEVEL1_DCACHE_ASSOC 0x0093 311 /** sysconf() query for the L1 data cache line size. Not available on all architectures. */ 312 #define _SC_LEVEL1_DCACHE_LINESIZE 0x0094 313 /** sysconf() query for the L2 cache size. Not available on all architectures. */ 314 #define _SC_LEVEL2_CACHE_SIZE 0x0095 315 /** sysconf() query for the L2 cache associativity. Not available on all architectures. */ 316 #define _SC_LEVEL2_CACHE_ASSOC 0x0096 317 /** sysconf() query for the L2 cache line size. Not available on all architectures. */ 318 #define _SC_LEVEL2_CACHE_LINESIZE 0x0097 319 /** sysconf() query for the L3 cache size. Not available on all architectures. */ 320 #define _SC_LEVEL3_CACHE_SIZE 0x0098 321 /** sysconf() query for the L3 cache associativity. Not available on all architectures. */ 322 #define _SC_LEVEL3_CACHE_ASSOC 0x0099 323 /** sysconf() query for the L3 cache line size. Not available on all architectures. */ 324 #define _SC_LEVEL3_CACHE_LINESIZE 0x009a 325 /** sysconf() query for the L4 cache size. Not available on all architectures. */ 326 #define _SC_LEVEL4_CACHE_SIZE 0x009b 327 /** sysconf() query for the L4 cache associativity. Not available on all architectures. */ 328 #define _SC_LEVEL4_CACHE_ASSOC 0x009c 329 /** sysconf() query for the L4 cache line size. Not available on all architectures. */ 330 #define _SC_LEVEL4_CACHE_LINESIZE 0x009d 331 332 __BEGIN_DECLS 333 334 /** 335 * [sysconf(3)](https://man7.org/linux/man-pages/man3/sysconf.3.html) 336 * gets system configuration at runtime, corresponding to the given 337 * `_SC_` constant. See the man page for details on how to interpret 338 * the results. 339 * 340 * For `_SC_` constants where an equivalent is given, it's cheaper on Android 341 * to go straight to that function call --- sysconf() is just a multiplexer. 342 * This may not be true on other systems, and other systems may not support the 343 * direct function, so sysconf() can be useful for portability, though despite 344 * POSIX's best efforts, the exact set of constants that return useful results 345 * will also vary by system. 346 */ 347 long sysconf(int __name); 348 349 __END_DECLS 350