1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_SYSLIMITS_H_ 33 #define _SYS_SYSLIMITS_H_ 34 35 #if !defined(_STANDALONE) && !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_) 36 #warning "No user-serviceable parts inside." 37 #endif 38 39 /* 40 * Do not add any new variables here. (See the comment at the end of 41 * the file for why.) 42 */ 43 #ifndef __ILP32__ 44 #define ARG_MAX (2 * 256 * 1024) /* max bytes for an exec function */ 45 #else 46 #define ARG_MAX (256 * 1024) /* max bytes for KVA-starved archs */ 47 #endif 48 #ifndef CHILD_MAX 49 #define CHILD_MAX 40 /* max simultaneous processes */ 50 #endif 51 #define MAX_CANON 255 /* max bytes in term canon input line */ 52 #define MAX_INPUT 255 /* max bytes in terminal input */ 53 #define NAME_MAX 255 /* max bytes in a file name */ 54 #ifndef NGROUPS_MAX 55 #define NGROUPS_MAX 1023 /* max supplemental group id's */ 56 #endif 57 #ifndef OPEN_MAX 58 #define OPEN_MAX 64 /* max open files per process */ 59 #endif 60 #define PATH_MAX 1024 /* max bytes in pathname */ 61 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */ 62 #define IOV_MAX 1024 /* max elements in i/o vector */ 63 64 /* 65 * We leave the following values undefined to force applications to either 66 * assume conservative values or call sysconf() to get the current value. 67 * 68 * HOST_NAME_MAX 69 * 70 * (We should do this for most of the values currently defined here, 71 * but many programs are not prepared to deal with this yet.) 72 */ 73 #endif 74