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      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 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1988 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 
     31 #ifndef _LIMITS_H
     32 #define	_LIMITS_H
     33 
     34 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.34  */
     35 
     36 #include <sys/feature_tests.h>
     37 #include <sys/isa_defs.h>
     38 #include <iso/limits_iso.h>
     39 
     40 /*
     41  * Include fixed width type limits as proposed by the ISO/JTC1/SC22/WG14 C
     42  * committee's working draft for the revision of the current ISO C standard,
     43  * ISO/IEC 9899:1990 Programming language - C.  These are not currently
     44  * required by any standard but constitute a useful, general purpose set
     45  * of type definitions and limits which is namespace clean with respect to
     46  * all standards.
     47  */
     48 #if defined(__EXTENSIONS__) || !defined(_STRICT_STDC) || \
     49 	defined(__XOPEN_OR_POSIX)
     50 #include <sys/int_limits.h>
     51 #endif
     52 
     53 #ifdef	__cplusplus
     54 extern "C" {
     55 #endif
     56 
     57 #if defined(__EXTENSIONS__) || !defined(_STRICT_STDC) || \
     58 	defined(__XOPEN_OR_POSIX)
     59 
     60 #define	SSIZE_MAX	LONG_MAX	/* max value of an "ssize_t" */
     61 
     62 /*
     63  * ARG_MAX is calculated as follows:
     64  * NCARGS - space for other stuff on initial stack
     65  * like aux vectors, saved registers, etc..
     66  */
     67 #define	_ARG_MAX32	1048320	/* max length of args to exec 32-bit program */
     68 #define	_ARG_MAX64	2096640	/* max length of args to exec 64-bit program */
     69 #ifdef	_LP64
     70 #define	ARG_MAX		_ARG_MAX64	/* max length of arguments to exec */
     71 #else	/* _LP64 */
     72 #define	ARG_MAX		_ARG_MAX32	/* max length of arguments to exec */
     73 #endif	/* _LP64 */
     74 
     75 #ifndef MAX_CANON
     76 #define	MAX_CANON	256	/* max bytes in line for canonical processing */
     77 #endif
     78 
     79 #ifndef MAX_INPUT
     80 #define	MAX_INPUT	512	/* max size of a char input buffer */
     81 #endif
     82 
     83 #define	NGROUPS_MAX	16	/* max number of groups for a user */
     84 
     85 #ifndef PATH_MAX
     86 #define	PATH_MAX	1024	/* max # of characters in a path name */
     87 #endif
     88 
     89 #define	SYMLINK_MAX	1024	/* max # of characters a symlink can contain */
     90 
     91 #define	PIPE_BUF	5120	/* max # bytes atomic in write to a pipe */
     92 
     93 #ifndef TMP_MAX
     94 #define	TMP_MAX		17576	/* 26 * 26 * 26 */
     95 #endif
     96 
     97 /*
     98  * POSIX conformant definitions - An implementation may define
     99  * other symbols which reflect the actual implementation. Alternate
    100  * definitions may not be as restrictive as the POSIX definitions.
    101  */
    102 #define	_POSIX_AIO_LISTIO_MAX	    2
    103 #define	_POSIX_AIO_MAX		    1
    104 #define	_POSIX_ARG_MAX		 4096
    105 #ifdef _XPG6
    106 #define	_POSIX_CHILD_MAX	   25
    107 #else
    108 #define	_POSIX_CHILD_MAX	    6	/* POSIX.1-1990 default */
    109 #endif
    110 #define	_POSIX_CLOCKRES_MIN	20000000
    111 #define	_POSIX_DELAYTIMER_MAX	   32
    112 #define	_POSIX_LINK_MAX		    8
    113 #define	_POSIX_MAX_CANON	  255
    114 #define	_POSIX_MAX_INPUT	  255
    115 #define	_POSIX_MQ_OPEN_MAX	    8
    116 #define	_POSIX_MQ_PRIO_MAX	   32
    117 #define	_POSIX_NAME_MAX		   14
    118 #ifdef _XPG6
    119 #define	_POSIX_NGROUPS_MAX	    8
    120 #define	_POSIX_OPEN_MAX		   20
    121 #define	_POSIX_PATH_MAX		  256
    122 #else					/* POSIX.1-1990 defaults */
    123 #define	_POSIX_NGROUPS_MAX	    0
    124 #define	_POSIX_OPEN_MAX		   16
    125 #define	_POSIX_PATH_MAX		  255
    126 #endif
    127 #define	_POSIX_PIPE_BUF		  512
    128 #define	_POSIX_RTSIG_MAX	    8
    129 #define	_POSIX_SEM_NSEMS_MAX	  256
    130 #define	_POSIX_SEM_VALUE_MAX	32767
    131 #define	_POSIX_SIGQUEUE_MAX	   32
    132 #define	_POSIX_SSIZE_MAX	32767
    133 #define	_POSIX_STREAM_MAX	    8
    134 #define	_POSIX_TIMER_MAX	   32
    135 #ifdef _XPG6
    136 #define	_POSIX_TZNAME_MAX	    6
    137 #else
    138 #define	_POSIX_TZNAME_MAX	    3	/* POSIX.1-1990 default */
    139 #endif
    140 /* POSIX.1c conformant */
    141 #define	_POSIX_LOGIN_NAME_MAX			9
    142 #define	_POSIX_THREAD_DESTRUCTOR_ITERATIONS	4
    143 #define	_POSIX_THREAD_KEYS_MAX			128
    144 #define	_POSIX_THREAD_THREADS_MAX		64
    145 #define	_POSIX_TTY_NAME_MAX			9
    146 /* UNIX 03 conformant */
    147 #define	_POSIX_HOST_NAME_MAX			255
    148 #define	_POSIX_RE_DUP_MAX			255
    149 #define	_POSIX_SYMLINK_MAX			255
    150 #define	_POSIX_SYMLOOP_MAX			8
    151 
    152 /*
    153  * POSIX.2 and XPG4-XSH4 conformant definitions
    154  */
    155 
    156 #define	_POSIX2_BC_BASE_MAX		  99
    157 #define	_POSIX2_BC_DIM_MAX		2048
    158 #define	_POSIX2_BC_SCALE_MAX		  99
    159 #define	_POSIX2_BC_STRING_MAX		1000
    160 #define	_POSIX2_COLL_WEIGHTS_MAX	   2
    161 #define	_POSIX2_EXPR_NEST_MAX		  32
    162 #define	_POSIX2_LINE_MAX		2048
    163 #define	_POSIX2_RE_DUP_MAX		 255
    164 /* UNIX 03 conformant */
    165 #define	_POSIX2_CHARCLASS_NAME_MAX	  14
    166 
    167 #define	BC_BASE_MAX		_POSIX2_BC_BASE_MAX
    168 #define	BC_DIM_MAX		_POSIX2_BC_DIM_MAX
    169 #define	BC_SCALE_MAX		_POSIX2_BC_SCALE_MAX
    170 #define	BC_STRING_MAX		_POSIX2_BC_STRING_MAX
    171 #define	COLL_WEIGHTS_MAX	10
    172 #define	EXPR_NEST_MAX		_POSIX2_EXPR_NEST_MAX
    173 #define	LINE_MAX		_POSIX2_LINE_MAX
    174 #if !defined(_XPG6)
    175 #define	RE_DUP_MAX		_POSIX2_RE_DUP_MAX
    176 #else
    177 #define	RE_DUP_MAX		_POSIX_RE_DUP_MAX
    178 #endif /* !defined(_XPG6) */
    179 
    180 #endif /* defined(__EXTENSIONS__) || !defined(_STRICT_STDC) ... */
    181 
    182 #if defined(__EXTENSIONS__) || \
    183 	(!defined(_STRICT_STDC) && !defined(_POSIX_C_SOURCE)) || \
    184 	defined(_XOPEN_SOURCE)
    185 
    186 /*
    187  * For dual definitions for PASS_MAX and sysconf.c
    188  */
    189 #define	_PASS_MAX_XPG	8	/* old standards PASS_MAX */
    190 #define	_PASS_MAX	256	/* modern Solaris PASS_MAX */
    191 
    192 #if defined(_XPG3) && !defined(_XPG6)
    193 #define	PASS_MAX	_PASS_MAX_XPG	/* max # of characters in a password */
    194 #else	/* XPG6 or just Solaris */
    195 #define	PASS_MAX	_PASS_MAX	/* max # of characters in a password */
    196 #endif	/* defined(_XPG3) && !defined(_XPG6) */
    197 
    198 #define	CHARCLASS_NAME_MAX	_POSIX2_CHARCLASS_NAME_MAX
    199 
    200 #define	NL_ARGMAX	9	/* max value of "digit" in calls to the	*/
    201 				/* NLS printf() and scanf() */
    202 #define	NL_LANGMAX	14	/* max # of bytes in a LANG name */
    203 #define	NL_MSGMAX	32767	/* max message number */
    204 #define	NL_NMAX		1	/* max # bytes in N-to-1 mapping characters */
    205 #define	NL_SETMAX	255	/* max set number */
    206 #define	NL_TEXTMAX	2048	/* max set number */
    207 #define	NZERO		20	/* default process priority */
    208 
    209 #define	WORD_BIT	32	/* # of bits in a "word" or "int" */
    210 #if defined(_LP64)
    211 #define	LONG_BIT	64	/* # of bits in a "long" */
    212 #else	/* _ILP32 */
    213 #define	LONG_BIT	32	/* # of bits in a "long" */
    214 #endif
    215 
    216 /* Marked as LEGACY in SUSv2 and removed in UNIX 03 */
    217 #ifndef _XPG6
    218 #define	DBL_DIG		15	/* digits of precision of a "double" */
    219 #define	DBL_MAX		1.7976931348623157081452E+308	/* max decimal value */
    220 							/* of a double */
    221 #define	FLT_DIG		6		/* digits of precision of a "float" */
    222 #define	FLT_MAX		3.4028234663852885981170E+38F	/* max decimal value */
    223 							/* of a "float" */
    224 #endif
    225 
    226 /* Marked as LEGACY in SUSv1 and removed in SUSv2 */
    227 #ifndef _XPG5
    228 #define	DBL_MIN		2.2250738585072013830903E-308	/* min decimal value */
    229 							/* of a double */
    230 #define	FLT_MIN		1.1754943508222875079688E-38F	/* min decimal value */
    231 							/* of a float */
    232 #endif
    233 
    234 #endif	/* defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) ... */
    235 
    236 #define	_XOPEN_IOV_MAX	16	/* max # iovec/process with readv()/writev() */
    237 #define	_XOPEN_NAME_MAX	255	/* max # bytes in filename excluding null */
    238 #define	_XOPEN_PATH_MAX	1024	/* max # bytes in a pathname */
    239 
    240 #define	IOV_MAX		_XOPEN_IOV_MAX
    241 
    242 #if defined(__EXTENSIONS__) || \
    243 	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
    244 
    245 #define	FCHR_MAX	1048576		/* max size of a file in bytes */
    246 #define	PID_MAX		999999		/* max value for a process ID */
    247 
    248 /*
    249  * POSIX 1003.1a, section 2.9.5, table 2-5 contains [NAME_MAX] and the
    250  * related text states:
    251  *
    252  * A definition of one of the values from Table 2-5 shall be omitted from the
    253  * <limits.h> on specific implementations where the corresponding value is
    254  * equal to or greater than the stated minimum, but where the value can vary
    255  * depending on the file to which it is applied. The actual value supported for
    256  * a specific pathname shall be provided by the pathconf() (5.7.1) function.
    257  *
    258  * This is clear that any machine supporting multiple file system types
    259  * and/or a network can not include this define, regardless of protection
    260  * by the _POSIX_SOURCE and _POSIX_C_SOURCE flags.
    261  *
    262  * #define	NAME_MAX	14
    263  */
    264 
    265 #define	CHILD_MAX	25	/* max # of processes per user id */
    266 #ifndef OPEN_MAX
    267 #define	OPEN_MAX	256	/* max # of files a process can have open */
    268 #endif
    269 
    270 #define	PIPE_MAX	5120	/* max # bytes written to a pipe in a write */
    271 
    272 #define	STD_BLK		1024	/* # bytes in a physical I/O block */
    273 #define	UID_MAX		2147483647	/* max value for a user or group ID */
    274 #define	USI_MAX		4294967295	/* max decimal value of an "unsigned" */
    275 #define	SYSPID_MAX	1	/* max pid of system processes */
    276 
    277 #ifndef SYS_NMLN		/* also defined in sys/utsname.h */
    278 #define	SYS_NMLN	257	/* 4.0 size of utsname elements */
    279 #endif
    280 
    281 #ifndef CLK_TCK
    282 
    283 #if !defined(_CLOCK_T) || __cplusplus >= 199711L
    284 #define	_CLOCK_T
    285 typedef long	clock_t;
    286 #endif	/* !_CLOCK_T */
    287 
    288 extern long _sysconf(int);	/* System Private interface to sysconf() */
    289 #define	CLK_TCK	((clock_t)_sysconf(3))	/* 3 is _SC_CLK_TCK */
    290 
    291 #endif /* CLK_TCK */
    292 
    293 #define	LOGNAME_MAX	8	/* max # of characters in a login name */
    294 #define	TTYNAME_MAX	128	/* max # of characters in a tty name */
    295 
    296 #endif	/* if defined(__EXTENSIONS__) || (!defined(_STRICT_STDC) ... */
    297 
    298 #if	defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L)
    299 #include <sys/unistd.h>
    300 
    301 #if !defined(_SIZE_T) || __cplusplus >= 199711L
    302 #define	_SIZE_T
    303 #if defined(_LP64) || defined(_I32LPx)
    304 typedef	unsigned long size_t;	/* size of something in bytes */
    305 #else
    306 typedef	unsigned int  size_t;	/* (historical version) */
    307 #endif
    308 #endif	/* _SIZE_T */
    309 
    310 extern long _sysconf(int);	/* System Private interface to sysconf() */
    311 
    312 #define	PTHREAD_STACK_MIN	((size_t)_sysconf(_SC_THREAD_STACK_MIN))
    313 /* Added for UNIX98 conformance */
    314 #define	PTHREAD_DESTRUCTOR_ITERATIONS	_POSIX_THREAD_DESTRUCTOR_ITERATIONS
    315 #define	PTHREAD_KEYS_MAX		_POSIX_THREAD_KEYS_MAX
    316 #define	PTHREAD_THREADS_MAX		_POSIX_THREAD_THREADS_MAX
    317 #endif	/* defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L) */
    318 
    319 #ifdef	__cplusplus
    320 }
    321 #endif
    322 
    323 #endif	/* _LIMITS_H */
    324