2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)syslimits.h 8.1 (Berkeley) 6/2/93
37 #ifndef _SYS_SYSLIMITS_H_
38 #define _SYS_SYSLIMITS_H_
40 #if !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_)
42 #warning "No user-serviceable parts inside."
47 * Do not add any new variables here. (See the comment at the end of
50 #define ARG_MAX 65536 /* max bytes for an exec function */
52 #define CHILD_MAX 40 /* max simultaneous processes */
54 #define LINK_MAX 32767 /* max file link count */
55 #define MAX_CANON 255 /* max bytes in term canon input line */
56 #define MAX_INPUT 255 /* max bytes in terminal input */
57 #define NAME_MAX 255 /* max bytes in a file name */
58 #define NGROUPS_MAX 16 /* max supplemental group id's */
60 #define OPEN_MAX 64 /* max open files per process */
62 #define PATH_MAX 1024 /* max bytes in pathname */
63 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */
64 #define IOV_MAX 1024 /* max elements in i/o vector */
67 * We leave the following values undefined to force applications to either
68 * assume conservative values or call sysconf() to get the current value.
72 * (We should do this for most of the values currently defined here,
73 * but many programs are not prepared to deal with this yet.)