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    1: /*      $OpenBSD: syslimits.h,v 1.11 2008/02/02 15:31:31 kettenis 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          (256 * 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: #endif
   61: 
   62: #if __XPG_VISIBLE
   63: #define IOV_MAX                  1024 /* max # of iov's (readv,sendmsg,etc) */
   64: #define NZERO                      20   /* default "nice" */
   65: #endif /* __XPG_VISIBLE */
   66: 
   67: #endif /* __POSIX_VISIBLE || __XPG_VISIBLE || __BSD_VISIBLE */
   68: 
   69: #if __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE
   70: #define TTY_NAME_MAX            260       /* max tty device name length w/ NUL */
   71: #define LOGIN_NAME_MAX          32      /* max login name length w/ NUL */
   72: #endif /* __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE */
   73: 
   74: #if __POSIX_VISIBLE >= 200112
   75: #define HOST_NAME_MAX           255
   76: #endif