syslimits.h revision 329175 
1/*-
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  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 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
30 * $FreeBSD: stable/11/sys/sys/syslimits.h 329175 2018-02-12 17:44:35Z kevans $
31 */
32
33#ifndef _SYS_SYSLIMITS_H_
34#define _SYS_SYSLIMITS_H_
35
36#if !defined(_STANDALONE) && !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_)
37#ifndef _SYS_CDEFS_H_
38#error this file needs sys/cdefs.h as a prerequisite
39#endif
40#ifdef __CC_SUPPORTS_WARNING
41#warning "No user-serviceable parts inside."
42#endif
43#endif
44
45/*
46 * Do not add any new variables here.  (See the comment at the end of
47 * the file for why.)
48 */
49#define	ARG_MAX			262144	/* max bytes for an exec function */
50#ifndef CHILD_MAX
51#define	CHILD_MAX		   40	/* max simultaneous processes */
52#endif
53#define	LINK_MAX		32767	/* max file link count */
54#define	MAX_CANON		  255	/* max bytes in term canon input line */
55#define	MAX_INPUT		  255	/* max bytes in terminal input */
56#define	NAME_MAX		  255	/* max bytes in a file name */
57#ifndef NGROUPS_MAX
58#define	NGROUPS_MAX	 	 1023	/* max supplemental group id's */
59#endif
60#ifndef OPEN_MAX
61#define	OPEN_MAX		   64	/* max open files per process */
62#endif
63#define	PATH_MAX		 1024	/* max bytes in pathname */
64#define	PIPE_BUF		  512	/* max bytes for atomic pipe writes */
65#define	IOV_MAX			 1024	/* max elements in i/o vector */
66
67/*
68 * We leave the following values undefined to force applications to either
69 * assume conservative values or call sysconf() to get the current value.
70 *
71 * HOST_NAME_MAX
72 *
73 * (We should do this for most of the values currently defined here,
74 * but many programs are not prepared to deal with this yet.)
75 */
76#endif
77