sys/sys/syslimits.h

   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 #include <sys/cdefs.h>
  38 #if __GNUC_PREREQ__(3, 0)
  39 #warning "No user-serviceable parts inside."
  40 #endif
  41 #endif
  42
  43 /*
  44  * Do not add any new variables here.  (See the comment at the end of
  45  * the file for why.)
  46  */
  47 #define ARG_MAX                 262144  /* max bytes for an exec function */
  48 #ifndef CHILD_MAX
  49 #define CHILD_MAX                  40   /* max simultaneous processes */
  50 #endif
  51 #define LINK_MAX                32767   /* max file link count */
  52 #define MAX_CANON                 255   /* max bytes in term canon input line */
  53 #define MAX_INPUT                 255   /* max bytes in terminal input */
  54 #define NAME_MAX                  255   /* max bytes in a file name */
  55 #define NGROUPS_MAX                16   /* max supplemental group id's */
  56 #ifndef OPEN_MAX
  57 #define OPEN_MAX                   64   /* max open files per process */
  58 #endif
  59 #define PATH_MAX                 1024   /* max bytes in pathname */
  60 #define PIPE_BUF                  512   /* max bytes for atomic pipe writes */
  61 #define IOV_MAX                  1024   /* max elements in i/o vector */
  62
  63 /*
  64  * We leave the following values undefined to force applications to either
  65  * assume conservative values or call sysconf() to get the current value.
  66  *
  67  * HOST_NAME_MAX
  68  *
  69  * (We should do this for most of the values currently defined here,
  70  * but many programs are not prepared to deal with this yet.)
  71  */
  72 #endif