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 * Copyright 2017 RackTop Systems. 25 * 26 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 * Copyright 2015 Joyent, Inc. All rights reserved. 29 */ 30 31 /* Copyright (c) 1988 AT&T */ 32 /* All Rights Reserved */ 33 34 35 #ifndef _LIMITS_H 36 #define _LIMITS_H 37 38 #include <sys/feature_tests.h> 39 #include <sys/isa_defs.h> 40 #include <iso/limits_iso.h> 41 #include <sys/limits.h> 42 43 /* 44 * Include fixed width type limits as proposed by the ISO/JTC1/SC22/WG14 C 45 * committee's working draft for the revision of the current ISO C standard, 46 * ISO/IEC 9899:1990 Programming language - C. These are not currently 47 * required by any standard but constitute a useful, general purpose set 48 * of type definitions and limits which is namespace clean with respect to 49 * all standards. 50 */ 51 #if defined(__EXTENSIONS__) || !defined(_STRICT_STDC) || \ 52 defined(__XOPEN_OR_POSIX) 53 #include <sys/int_limits.h> 54 #endif 55 56 #ifdef __cplusplus 57 extern "C" { 58 #endif 59 60 #if defined(__EXTENSIONS__) || !defined(_STRICT_STDC) || \ 61 defined(__XOPEN_OR_POSIX) 62 63 #define SSIZE_MAX LONG_MAX /* max value of an "ssize_t" */ 64 65 /* 66 * ARG_MAX is calculated as follows: 67 * NCARGS - space for other stuff on initial stack 68 * like aux vectors, saved registers, etc.. 69 */ 70 #define _ARG_MAX32 1048320 /* max length of args to exec 32-bit program */ 71 #define _ARG_MAX64 2096640 /* max length of args to exec 64-bit program */ 72 #ifdef _LP64 73 #define ARG_MAX _ARG_MAX64 /* max length of arguments to exec */ 74 #else /* _LP64 */ 75 #define ARG_MAX _ARG_MAX32 /* max length of arguments to exec */ 76 #endif /* _LP64 */ 77 78 79 /* 80 * These two symbols have their historical values, the actual buffer is 81 * larger. 82 */ 83 #ifndef MAX_CANON 84 #define MAX_CANON 256 /* max bytes in line for canonical processing */ 85 #endif 86 87 #ifndef MAX_INPUT 88 #define MAX_INPUT 512 /* max size of a char input buffer */ 89 #endif 90 91 #define NGROUPS_MAX 16 /* max number of groups for a user */ 92 93 #ifndef PATH_MAX 94 #define PATH_MAX 1024 /* max # of characters in a path name */ 95 #endif 96 97 #define SYMLINK_MAX 1024 /* max # of characters a symlink can contain */ 98 99 #define PIPE_BUF 5120 /* max # bytes atomic in write to a pipe */ 100 101 #ifndef TMP_MAX 102 #define TMP_MAX 17576 /* 26 * 26 * 26 */ 103 #endif 104 105 /* 106 * POSIX conformant definitions - An implementation may define 107 * other symbols which reflect the actual implementation. Alternate 108 * definitions may not be as restrictive as the POSIX definitions. 109 */ 110 #define _POSIX_AIO_LISTIO_MAX 2 111 #define _POSIX_AIO_MAX 1 112 #define _POSIX_ARG_MAX 4096 113 #ifdef _XPG6 114 #define _POSIX_CHILD_MAX 25 115 #else 116 #define _POSIX_CHILD_MAX 6 /* POSIX.1-1990 default */ 117 #endif 118 #define _POSIX_CLOCKRES_MIN 20000000 119 #define _POSIX_DELAYTIMER_MAX 32 120 #define _POSIX_LINK_MAX 8 121 #define _POSIX_MAX_CANON 255 122 #define _POSIX_MAX_INPUT 255 123 #define _POSIX_MQ_OPEN_MAX 8 124 #define _POSIX_MQ_PRIO_MAX 32 125 #define _POSIX_NAME_MAX 14 126 #ifdef _XPG6 127 #define _POSIX_NGROUPS_MAX 8 128 #define _POSIX_OPEN_MAX 20 129 #define _POSIX_PATH_MAX 256 130 #else /* POSIX.1-1990 defaults */ 131 #define _POSIX_NGROUPS_MAX 0 132 #define _POSIX_OPEN_MAX 16 133 #define _POSIX_PATH_MAX 255 134 #endif 135 #define _POSIX_PIPE_BUF 512 136 #define _POSIX_RTSIG_MAX 8 137 #define _POSIX_SEM_NSEMS_MAX 256 138 #define _POSIX_SEM_VALUE_MAX 32767 139 #define _POSIX_SIGQUEUE_MAX 32 140 #define _POSIX_SSIZE_MAX 32767 141 #define _POSIX_STREAM_MAX 8 142 #define _POSIX_TIMER_MAX 32 143 #ifdef _XPG6 144 #define _POSIX_TZNAME_MAX 6 145 #else 146 #define _POSIX_TZNAME_MAX 3 /* POSIX.1-1990 default */ 147 #endif 148 /* POSIX.1c conformant */ 149 #define _POSIX_LOGIN_NAME_MAX 9 150 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 151 #define _POSIX_THREAD_KEYS_MAX 128 152 #define _POSIX_THREAD_THREADS_MAX 64 153 #define _POSIX_TTY_NAME_MAX 9 154 /* UNIX 03 conformant */ 155 #define _POSIX_HOST_NAME_MAX 255 156 #define _POSIX_RE_DUP_MAX 255 157 #define _POSIX_SYMLINK_MAX 255 158 #define _POSIX_SYMLOOP_MAX 8 159 160 /* 161 * POSIX.2 and XPG4-XSH4 conformant definitions 162 */ 163 164 #define _POSIX2_BC_BASE_MAX 99 165 #define _POSIX2_BC_DIM_MAX 2048 166 #define _POSIX2_BC_SCALE_MAX 99 167 #define _POSIX2_BC_STRING_MAX 1000 168 #define _POSIX2_COLL_WEIGHTS_MAX 2 169 #define _POSIX2_EXPR_NEST_MAX 32 170 #define _POSIX2_LINE_MAX 2048 171 #define _POSIX2_RE_DUP_MAX 255 172 /* UNIX 03 conformant */ 173 #define _POSIX2_CHARCLASS_NAME_MAX 14 174 175 #define BC_BASE_MAX _POSIX2_BC_BASE_MAX 176 #define BC_DIM_MAX _POSIX2_BC_DIM_MAX 177 #define BC_SCALE_MAX _POSIX2_BC_SCALE_MAX 178 #define BC_STRING_MAX _POSIX2_BC_STRING_MAX 179 #define COLL_WEIGHTS_MAX 10 180 #define EXPR_NEST_MAX _POSIX2_EXPR_NEST_MAX 181 #define LINE_MAX _POSIX2_LINE_MAX 182 #if !defined(_XPG6) 183 #define RE_DUP_MAX _POSIX2_RE_DUP_MAX 184 #else 185 #define RE_DUP_MAX _POSIX_RE_DUP_MAX 186 #endif /* !defined(_XPG6) */ 187 188 #endif /* defined(__EXTENSIONS__) || !defined(_STRICT_STDC) ... */ 189 190 #if defined(__EXTENSIONS__) || \ 191 (!defined(_STRICT_STDC) && !defined(_POSIX_C_SOURCE)) || \ 192 defined(_XOPEN_SOURCE) 193 194 /* 195 * For dual definitions for PASS_MAX and sysconf.c 196 */ 197 #define _PASS_MAX_XPG 8 /* old standards PASS_MAX */ 198 #define _PASS_MAX 256 /* modern Solaris PASS_MAX */ 199 200 #if defined(_XPG3) && !defined(_XPG6) 201 #define PASS_MAX _PASS_MAX_XPG /* max # of characters in a password */ 202 #else /* XPG6 or just Solaris */ 203 #define PASS_MAX _PASS_MAX /* max # of characters in a password */ 204 #endif /* defined(_XPG3) && !defined(_XPG6) */ 205 206 #define CHARCLASS_NAME_MAX _POSIX2_CHARCLASS_NAME_MAX 207 208 #define NL_ARGMAX 9 /* max value of "digit" in calls to the */ 209 /* NLS printf() and scanf() */ 210 #define NL_LANGMAX 14 /* max # of bytes in a LANG name */ 211 #define NL_MSGMAX 32767 /* max message number */ 212 #define NL_NMAX 1 /* max # bytes in N-to-1 mapping characters */ 213 #define NL_SETMAX 255 /* max set number */ 214 #define NL_TEXTMAX 2048 /* max set number */ 215 #define NZERO 20 /* default process priority */ 216 217 #define WORD_BIT 32 /* # of bits in a "word" or "int" */ 218 #if defined(_LP64) 219 #define LONG_BIT 64 /* # of bits in a "long" */ 220 #else /* _ILP32 */ 221 #define LONG_BIT 32 /* # of bits in a "long" */ 222 #endif 223 224 /* Marked as LEGACY in SUSv2 and removed in UNIX 03 */ 225 #ifndef _XPG6 226 #define DBL_DIG 15 /* digits of precision of a "double" */ 227 #define DBL_MAX 1.7976931348623157081452E+308 /* max decimal value */ 228 /* of a double */ 229 #define FLT_DIG 6 /* digits of precision of a "float" */ 230 #define FLT_MAX 3.4028234663852885981170E+38F /* max decimal value */ 231 /* of a "float" */ 232 #endif 233 234 /* Marked as LEGACY in SUSv1 and removed in SUSv2 */ 235 #ifndef _XPG5 236 #define DBL_MIN 2.2250738585072013830903E-308 /* min decimal value */ 237 /* of a double */ 238 #define FLT_MIN 1.1754943508222875079688E-38F /* min decimal value */ 239 /* of a float */ 240 #endif 241 242 #endif /* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) ... */ 243 244 #define _XOPEN_IOV_MAX 16 /* max # iovec/process with readv()/writev() */ 245 #define _XOPEN_NAME_MAX 255 /* max # bytes in filename excluding null */ 246 #define _XOPEN_PATH_MAX 1024 /* max # bytes in a pathname */ 247 248 #if defined(__EXTENSIONS__) || \ 249 (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) 250 251 #define FCHR_MAX 1048576 /* max size of a file in bytes */ 252 #define PID_MAX 999999 /* max value for a process ID */ 253 254 /* 255 * POSIX 1003.1a, section 2.9.5, table 2-5 contains [NAME_MAX] and the 256 * related text states: 257 * 258 * A definition of one of the values from Table 2-5 shall be omitted from the 259 * <limits.h> on specific implementations where the corresponding value is 260 * equal to or greater than the stated minimum, but where the value can vary 261 * depending on the file to which it is applied. The actual value supported for 262 * a specific pathname shall be provided by the pathconf() (5.7.1) function. 263 * 264 * This is clear that any machine supporting multiple file system types 265 * and/or a network should not include this define, regardless of protection 266 * by the _POSIX_SOURCE and _POSIX_C_SOURCE flags. We chose to ignore that 267 * and provide it anyway for compatibility with other platforms that don't 268 * follow the spec as precisely as they should. Its usage is discouraged. 269 */ 270 #define NAME_MAX 255 271 272 #define CHILD_MAX 25 /* max # of processes per user id */ 273 #ifndef OPEN_MAX 274 #define OPEN_MAX 256 /* max # of files a process can have open */ 275 #endif 276 277 #define PIPE_MAX 5120 /* max # bytes written to a pipe in a write */ 278 279 #define STD_BLK 1024 /* # bytes in a physical I/O block */ 280 #define UID_MAX 2147483647 /* max value for a user or group ID */ 281 #define USI_MAX 4294967295 /* max decimal value of an "unsigned" */ 282 #define SYSPID_MAX 1 /* max pid of system processes */ 283 284 #ifndef SYS_NMLN /* also defined in sys/utsname.h */ 285 #define SYS_NMLN 257 /* 4.0 size of utsname elements */ 286 #endif 287 288 #ifndef CLK_TCK 289 290 #if !defined(_CLOCK_T) || __cplusplus >= 199711L 291 #define _CLOCK_T 292 typedef long clock_t; 293 #endif /* !_CLOCK_T */ 294 295 extern long _sysconf(int); /* System Private interface to sysconf() */ 296 #define CLK_TCK ((clock_t)_sysconf(3)) /* 3 is _SC_CLK_TCK */ 297 298 #endif /* CLK_TCK */ 299 300 #ifdef __USE_LEGACY_LOGNAME__ 301 #define LOGNAME_MAX 8 /* max # of characters in a login name */ 302 #else /* __USE_LEGACY_LOGNAME__ */ 303 #define LOGNAME_MAX 32 /* max # of characters in a login name */ 304 /* Increased for illumos */ 305 #endif /* __USE_LEGACY_LOGNAME__ */ 306 #define LOGIN_NAME_MAX (LOGNAME_MAX + 1) /* max buffer size */ 307 #define LOGNAME_MAX_TRAD 8 /* traditional length */ 308 #define LOGIN_NAME_MAX_TRAD (LOGNAME_MAX_TRAD + 1) /* and size */ 309 310 #define TTYNAME_MAX 128 /* max # of characters in a tty name */ 311 312 #endif /* if defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) ... */ 313 314 #if defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L) 315 #include <sys/unistd.h> 316 317 #if !defined(_SIZE_T) || __cplusplus >= 199711L 318 #define _SIZE_T 319 #if defined(_LP64) || defined(_I32LPx) 320 typedef unsigned long size_t; /* size of something in bytes */ 321 #else 322 typedef unsigned int size_t; /* (historical version) */ 323 #endif 324 #endif /* _SIZE_T */ 325 326 extern long _sysconf(int); /* System Private interface to sysconf() */ 327 328 #define PTHREAD_STACK_MIN ((size_t)_sysconf(_SC_THREAD_STACK_MIN)) 329 /* Added for UNIX98 conformance */ 330 #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS 331 #define PTHREAD_KEYS_MAX _POSIX_THREAD_KEYS_MAX 332 #define PTHREAD_THREADS_MAX _POSIX_THREAD_THREADS_MAX 333 #endif /* defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L) */ 334 335 #ifdef __cplusplus 336 } 337 #endif 338 339 #endif /* _LIMITS_H */ 340