1 /* $OpenBSD: syslimits.h,v 1.15 2022/02/22 16:58:08 deraadt Exp $ */ 2 /* $NetBSD: syslimits.h,v 1.12 1995/10/05 05:26:19 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)syslimits.h 8.1 (Berkeley) 6/2/93 33 */ 34 35 #include <sys/cdefs.h> 36 37 #if __POSIX_VISIBLE || __XPG_VISIBLE || __BSD_VISIBLE 38 #define ARG_MAX (512 * 1024) /* max bytes for an exec function */ 39 #define CHILD_MAX 80 /* max simultaneous processes */ 40 #define LINK_MAX 32767 /* max file link count */ 41 #define MAX_CANON 255 /* max bytes in term canon input line */ 42 #define MAX_INPUT 255 /* max bytes in terminal input */ 43 #define NAME_MAX 255 /* max bytes in a file name */ 44 #define NGROUPS_MAX 16 /* max supplemental group id's */ 45 #define OPEN_MAX 64 /* max open files per process */ 46 #define PATH_MAX 1024 /* max bytes in pathname */ 47 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */ 48 #define SYMLINK_MAX PATH_MAX /* max bytes in a symbolic link */ 49 #define SYMLOOP_MAX 32 /* max symlinks per path (for loops) */ 50 51 #define BC_BASE_MAX INT_MAX /* max ibase/obase values in bc(1) */ 52 #define BC_DIM_MAX 65535 /* max array elements in bc(1) */ 53 #define BC_SCALE_MAX INT_MAX /* max scale value in bc(1) */ 54 #define BC_STRING_MAX INT_MAX /* max const string length in bc(1) */ 55 #define COLL_WEIGHTS_MAX 2 /* max weights for order keyword */ 56 #define EXPR_NEST_MAX 32 /* max expressions nested in expr(1) */ 57 #define LINE_MAX 2048 /* max bytes in an input line */ 58 #ifndef RE_DUP_MAX 59 #define RE_DUP_MAX 255 /* max RE's in interval notation */ 60 #define SEM_VALUE_MAX UINT_MAX /* max value of a sem_* semaphore */ 61 #endif 62 63 #if __XPG_VISIBLE 64 #define IOV_MAX 1024 /* max # of iov's (readv,sendmsg,etc) */ 65 #define NZERO 20 /* default "nice" */ 66 #endif /* __XPG_VISIBLE */ 67 68 #endif /* __POSIX_VISIBLE || __XPG_VISIBLE || __BSD_VISIBLE */ 69 70 #if __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE 71 #define TTY_NAME_MAX 260 /* max tty device name length w/ NUL */ 72 #define LOGIN_NAME_MAX 32 /* max login name length w/ NUL */ 73 #endif /* __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE */ 74 75 #if __POSIX_VISIBLE >= 200112 76 #define HOST_NAME_MAX 255 /* max hostname length w/o NUL */ 77 #endif 78 79 #define _MAXCOMLEN 24 /* includes NUL */ 80