xopen_lim.h

   1 /* Copyright (C) 1996 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /* Additional definitions from X/Open Portability Guide, Issue 4, Version 2
  20    System Interfaces and Headers, 4.16 <limits.h>
  21
  22    Please note only the values which are not greater than the minimum
  23    stated in the standard document are listed.  The `sysconf' functions
  24    should be used to obtain the actual value.  */
  25
  26 #ifndef _XOPEN_LIM_H
  27
  28 #define _XOPEN_LIM_H    1
  29
  30 /* We do not provide fixed values for
  31
  32    ARG_MAX      Maximum length of argument to the `exec' function
  33                 including environment data.
  34
  35    ATEXIT_MAX   Maximum number of functions that may be registered
  36                 with `atexit'.
  37
  38    CHILD_MAX    Maximum number of simultaneous processes per real
  39                 user ID.
  40
  41    OPEN_MAX     Maximum number of files that one process can have open
  42                 at anyone time.
  43
  44    PAGESIZE
  45    PAGE_SIZE    Size of bytes of a page.
  46
  47    PASS_MAX     Maximum number of significant bytes in a password.
  48 */
  49
  50
  51 /* Maximum number of `iovec' structures that one process has available
  52    for use with `readv' or writev'.  */
  53 #define IOV_MAX         _XOPEN_IOV_MAX
  54
  55 /* The number of streams that one process can have open at one time.  */
  56 #define STREAM_MAX      _POSIX_STREAM_MAX
  57
  58 /* Maximum number of bytes supported for the name of a time zone.  */
  59 #define TZNAME_MAX      _POSIX_TZNAME_MAX
  60
  61
  62 /* Maximum number of `iovec' structures that one process has available
  63    for use with `readv' or writev'.  */
  64 #define _XOPEN_IOV_MAX  _POSIX_UIO_MAXIOV
  65
  66
  67 /* Maximum value of `digit' in calls to the `printf' and `scanf'
  68    functions.  We have no limit, so return a reasonable value.  */
  69 #define NL_ARGMAX       _POSIX_ARG_MAX
  70
  71 /* Maximum number of bytes in a `LANG' name.  We have no limit.  */
  72 #define NL_LANGMAX      _POSIX2_LINE_MAX
  73
  74 /* Maximum message number.  We have no limit.  */
  75 #define NL_MSGMAX       INT_MAX
  76
  77 /* Maximum number of bytes in N-to-1 collation mapping.  We have no
  78    limit.  */
  79 #define NL_NMAX         INT_MAX
  80
  81 /* Maximum set number.  We have no limit.  */
  82 #define NL_SETMAX       INT_MAX
  83
  84 /* Maximum number of bytes in a message.  We have no limit.  */
  85 #define NL_TEXTMAX      INT_MAX
  86
  87 /* Default process priority.  */
  88 #define NZERO           20
  89
  90 #endif /* xopen_lim.h */