xref: /illumos-gate/usr/src/head/limits.h (revision 7c478bd9)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 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 /*
299  * POSIX.1c Note:
300  * PTHREAD_STACK_MIN is also defined in <pthread.h>.
301  */
302 #if	defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L)
303 #include <sys/unistd.h>
304 
305 #if !defined(_SIZE_T) || __cplusplus >= 199711L
306 #define	_SIZE_T
307 #if defined(_LP64) || defined(_I32LPx)
308 typedef	unsigned long size_t;	/* size of something in bytes */
309 #else
310 typedef	unsigned int  size_t;	/* (historical version) */
311 #endif
312 #endif	/* _SIZE_T */
313 
314 extern long _sysconf(int);	/* System Private interface to sysconf() */
315 
316 #define	PTHREAD_STACK_MIN	((size_t)_sysconf(_SC_THREAD_STACK_MIN))
317 /* Added for UNIX98 conformance */
318 #define	PTHREAD_DESTRUCTOR_ITERATIONS	_POSIX_THREAD_DESTRUCTOR_ITERATIONS
319 #define	PTHREAD_KEYS_MAX		_POSIX_THREAD_KEYS_MAX
320 #define	PTHREAD_THREADS_MAX		_POSIX_THREAD_THREADS_MAX
321 #endif	/* defined(__EXTENSIONS__) || (_POSIX_C_SOURCE >= 199506L) */
322 
323 #ifdef	__cplusplus
324 }
325 #endif
326 
327 #endif	/* _LIMITS_H */
328