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 * 3. 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: src/sys/sys/syslimits.h,v 1.23 2007/05/29 15:14:46 cognet Exp $ 31 */ 32 33 #ifndef _SYS_SYSLIMITS_H_ 34 #define _SYS_SYSLIMITS_H_ 35 36 #if !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_) 37 #if __GNUC__ >= 3 38 #warning "No user-serviceable parts inside." 39 #endif 40 #endif 41 42 /* 43 * Do not add any new variables here. (See the comment at the end of 44 * the file for why.) 45 */ 46 #define ARG_MAX 262144 /* max bytes for an exec function */ 47 #ifndef CHILD_MAX 48 #define CHILD_MAX 40 /* max simultaneous processes */ 49 #endif 50 #define LINK_MAX 32767 /* max file link count */ 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 #define NGROUPS_MAX 16 /* max supplemental group id's */ 55 #ifndef OPEN_MAX 56 #define OPEN_MAX 64 /* max open files per process */ 57 #endif 58 #define PATH_MAX 1024 /* max bytes in pathname */ 59 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */ 60 #define IOV_MAX 1024 /* max elements in i/o vector */ 61 62 /* 63 * We leave the following values undefined to force applications to either 64 * assume conservative values or call sysconf() to get the current value. 65 * 66 * HOST_NAME_MAX 67 * 68 * (We should do this for most of the values currently defined here, 69 * but many programs are not prepared to deal with this yet.) 70 */ 71 #endif 72