The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/syslimits.h

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    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  * 4. 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: releng/5.4/sys/sys/syslimits.h 145335 2005-04-20 19:11:07Z cvs2svn $
   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 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
   38 #warning "No user-serviceable parts inside."
   39 #endif
   40 #endif
   41 
   42 /*
   43  * Do not add any new variables here.  (See the comment at the end of
   44  * the file for why.)
   45  */
   46 #define ARG_MAX                 65536   /* max bytes for an exec function */
   47 #ifndef CHILD_MAX
   48 #define CHILD_MAX                  40   /* max simultaneous processes */
   49 #endif
   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                  255   /* max bytes in a file name */
   54 #define NGROUPS_MAX                16   /* max supplemental group id's */
   55 #ifndef OPEN_MAX
   56 #define OPEN_MAX                   64   /* max open files per process */
   57 #endif
   58 #define PATH_MAX                 1024   /* max bytes in pathname */
   59 #define PIPE_BUF                  512   /* max bytes for atomic pipe writes */
   60 #define IOV_MAX                  1024   /* max elements in i/o vector */
   61 
   62 /*
   63  * We leave the following values undefined to force applications to either
   64  * assume conservative values or call sysconf() to get the current value.
   65  *
   66  * HOST_NAME_MAX
   67  *
   68  * (We should do this for most of the values currently defined here,
   69  * but many programs are not prepared to deal with this yet.)
   70  */
   71 #endif

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