1 /* $NetBSD: syslimits.h,v 1.28 2015/08/21 07:19:39 uebayasi 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. 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 * @(#)syslimits.h 8.1 (Berkeley) 6/2/93 32 */ 33 34 #ifndef _SYS_SYSLIMITS_H_ 35 #define _SYS_SYSLIMITS_H_ 36 37 #include <sys/featuretest.h> 38 39 #if defined(_KERNEL_OPT) 40 #include "opt_syslimits.h" 41 #endif 42 43 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \ 44 defined(_NETBSD_SOURCE) 45 #define ARG_MAX (256 * 1024) /* max bytes for an exec function */ 46 #ifndef CHILD_MAX 47 #define CHILD_MAX 160 /* max simultaneous processes */ 48 #endif 49 #define GID_MAX 2147483647U /* max value for a gid_t (2^31-2) */ 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 511 /* max bytes in a file name, must be */ 54 /* kept in sync with MAXNAMLEN */ 55 #define NGROUPS_MAX 16 /* max supplemental group id's */ 56 #define UID_MAX 2147483647U /* max value for a uid_t (2^31-2) */ 57 #ifndef OPEN_MAX 58 #define OPEN_MAX 128 /* 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 63 #define BC_BASE_MAX INT_MAX /* max ibase/obase values in bc(1) */ 64 #define BC_DIM_MAX 65535 /* max array elements in bc(1) */ 65 #define BC_SCALE_MAX INT_MAX /* max scale value in bc(1) */ 66 #define BC_STRING_MAX INT_MAX /* max const string length in bc(1) */ 67 #define COLL_WEIGHTS_MAX 2 /* max weights for order keyword */ 68 #define EXPR_NEST_MAX 32 /* max expressions nested in expr(1) */ 69 #define LINE_MAX 2048 /* max bytes in an input line */ 70 #define RE_DUP_MAX 255 /* max RE's in interval notation */ 71 72 /* 73 * IEEE Std 1003.1c-95, adopted in X/Open CAE Specification Issue 5 Version 2 74 */ 75 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \ 76 defined(_NETBSD_SOURCE) 77 #define LOGIN_NAME_MAX 17 /* max login name length incl. NUL */ 78 #endif 79 80 /* 81 * X/Open CAE Specification Issue 5 Version 2 82 */ 83 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 84 #define IOV_MAX 1024 /* max # of iovec's for readv(2) etc. */ 85 #define NZERO 20 /* default "nice" */ 86 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ 87 88 #endif /* !_ANSI_SOURCE */ 89 90 #endif /* !_SYS_SYSLIMITS_H_ */ 91