1 /* $NetBSD: syslimits.h,v 1.19 2001/03/28 08:45:34 mrg Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)syslimits.h 8.1 (Berkeley) 6/2/93 36 */ 37 38 #ifndef _SYS_SYSLIMITS_H_ 39 #define _SYS_SYSLIMITS_H_ 40 41 #include <sys/featuretest.h> 42 43 #if !defined(_ANSI_SOURCE) 44 #define ARG_MAX (256 * 1024) /* max bytes for an exec function */ 45 #define CHILD_MAX 160 /* max simultaneous processes */ 46 #define GID_MAX 2147483647U /* max value for a gid_t (2^31-2) */ 47 #define LINK_MAX 32767 /* max file link count */ 48 #define MAX_CANON 255 /* max bytes in term canon input line */ 49 #define MAX_INPUT 255 /* max bytes in terminal input */ 50 #define NAME_MAX 255 /* max bytes in a file name */ 51 #define NGROUPS_MAX 16 /* max supplemental group id's */ 52 #define UID_MAX 2147483647U /* max value for a uid_t (2^31-2) */ 53 #define OPEN_MAX 64 /* max open files per process */ 54 #define PATH_MAX 1024 /* max bytes in pathname */ 55 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */ 56 57 #define BC_BASE_MAX INT_MAX /* max ibase/obase values in bc(1) */ 58 #define BC_DIM_MAX 65535 /* max array elements in bc(1) */ 59 #define BC_SCALE_MAX INT_MAX /* max scale value in bc(1) */ 60 #define BC_STRING_MAX INT_MAX /* max const string length in bc(1) */ 61 #define COLL_WEIGHTS_MAX 2 /* max weights for order keyword */ 62 #define EXPR_NEST_MAX 32 /* max expressions nested in expr(1) */ 63 #define LINE_MAX 2048 /* max bytes in an input line */ 64 #define RE_DUP_MAX 255 /* max RE's in interval notation */ 65 66 /* 67 * IEEE Std 1003.1c-95, adopted in X/Open CAE Specification Issue 5 Version 2 68 */ 69 #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || \ 70 (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 71 #define LOGIN_NAME_MAX 17 /* max login name length incl. NUL */ 72 #endif 73 74 /* 75 * X/Open CAE Specification Issue 5 Version 2 76 */ 77 #if !defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) 78 #define IOV_MAX 1024 /* max # of iovec's for readv(2) etc. */ 79 #define NZERO 20 /* default "nice" */ 80 #endif /* !_POSIX_C_SOURCE || _XOPEN_SOURCE */ 81 82 #endif /* !_ANSI_SOURCE */ 83 84 #endif /* !_SYS_SYSLIMITS_H_ */ 85