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
57extern "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
292typedef long	clock_t;
293#endif	/* !_CLOCK_T */
294
295extern 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)
320typedef	unsigned long size_t;	/* size of something in bytes */
321#else
322typedef	unsigned int  size_t;	/* (historical version) */
323#endif
324#endif	/* _SIZE_T */
325
326extern 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