sysdeps/unix/mk-local_lim.c

   1 /* Copyright (C) 1993, 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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <stdio.h>
  20 #include <sys/types.h>
  21
  22 #ifdef HAVE_SYS_PARAM_H
  23 #include <sys/param.h>
  24 #endif
  25
  26 #ifdef HAVE_LIMITS_H
  27 #include <limits.h>
  28 #endif
  29
  30 #ifdef HAVE_SYS_LIMITS_H
  31 #include <sys/limits.h>
  32 #endif
  33
  34 /* Generate local_lim.h from the values defined in the system's headers.  */
  35
  36 struct param
  37   {
  38     char *name;
  39     int value;
  40   };
  41
  42 static struct param params[] =
  43   {
  44
  45 #if !defined (ARG_MAX) && defined (NCARGS)
  46 #define ARG_MAX NCARGS
  47 #endif
  48 #ifdef ARG_MAX
  49     { "ARG_MAX", ARG_MAX },
  50 #endif
  51
  52 #if !defined (CHILD_MAX) && defined (MAXUPRC)
  53 #define CHILD_MAX MAXUPRC
  54 #endif
  55 #ifdef CHILD_MAX
  56     { "CHILD_MAX", CHILD_MAX },
  57 #endif
  58
  59 #if !defined (LINK_MAX) && defined (MAXLINK)
  60 #define LINK_MAX MAXLINK
  61 #endif
  62 #ifdef LINK_MAX
  63     { "LINK_MAX", LINK_MAX },
  64 #endif
  65
  66 #if !defined (OPEN_MAX) && defined (NOFILE)
  67 #define OPEN_MAX NOFILE
  68 #endif
  69 #ifdef OPEN_MAX
  70     { "OPEN_MAX", OPEN_MAX },
  71 #endif
  72
  73 #if !defined (MAX_CANON) && defined (CANBSIZ)
  74 #define MAX_CANON CANBSIZ
  75 #endif
  76 #ifdef MAX_CANON
  77     { "MAX_CANON", MAX_CANON },
  78 #endif
  79
  80 #if !defined (NAME_MAX) && defined (MAXNAMLEN)
  81 #define NAME_MAX MAXNAMLEN
  82 #endif
  83 #ifndef NAME_MAX
  84 #define NAME_MAX        255     /* XXX ? */
  85 #endif
  86     { "NAME_MAX", NAME_MAX },
  87
  88 #if !defined (PATH_MAX) && defined (MAXPATHLEN)
  89 #define PATH_MAX MAXPATHLEN
  90 #endif
  91 #ifdef PATH_MAX
  92     { "PATH_MAX", PATH_MAX },
  93 #endif
  94
  95 #if !defined (SYMLOOP_MAX) && defined (MAXSYMLINKS)
  96 #define SYMLOOP_MAX MAXSYMLINKS
  97 #endif
  98 #ifdef SYMLOOP_MAX
  99     { "SYMLOOP_MAX", SYMLOOP_MAX },
 100 #endif
 101
 102     { NULL, 0 }
 103   };
 104
 105 int
 106 main()
 107 {
 108   extern char *ctime ();
 109   extern time_t time ();
 110   time_t now = time ((time_t *) NULL);
 111   register struct param *p;
 112
 113   if (! params[0].name)
 114     /* We have no information to give, so let the caller know.  */
 115     exit (1);
 116
 117   printf ("\
 118 /* Implementation-specific limits.\n\
 119    Generated at %.24s.  */\n\n", ctime (&now));
 120
 121   for (p = params; p->name != NULL; ++p)
 122     printf ("#define %s %d\n", p->name, p->value);
 123
 124   exit (0);
 125 }