sysdeps/unix/mk-local_lim.c

   1 /* Copyright (C) 1993, 1996, 1997 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 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 bits/local_lim.h from the values defined in the system's
  35    headers.  */
  36
  37 struct param
  38   {
  39     char *name;
  40     int value;
  41   };
  42
  43 static struct param params[] =
  44   {
  45
  46 #if !defined (ARG_MAX) && defined (NCARGS)
  47 #define ARG_MAX NCARGS
  48 #endif
  49 #ifdef ARG_MAX
  50     { "ARG_MAX", ARG_MAX },
  51 #endif
  52
  53 #if !defined (CHILD_MAX) && defined (MAXUPRC)
  54 #define CHILD_MAX MAXUPRC
  55 #endif
  56 #ifdef CHILD_MAX
  57     { "CHILD_MAX", CHILD_MAX },
  58 #endif
  59
  60 #if !defined (LINK_MAX) && defined (MAXLINK)
  61 #define LINK_MAX MAXLINK
  62 #endif
  63 #ifdef LINK_MAX
  64     { "LINK_MAX", LINK_MAX },
  65 #endif
  66
  67 #if !defined (OPEN_MAX) && defined (NOFILE)
  68 #define OPEN_MAX NOFILE
  69 #endif
  70 #ifdef OPEN_MAX
  71     { "OPEN_MAX", OPEN_MAX },
  72 #endif
  73
  74 #if !defined (MAX_CANON) && defined (CANBSIZ)
  75 #define MAX_CANON CANBSIZ
  76 #endif
  77 #ifdef MAX_CANON
  78     { "MAX_CANON", MAX_CANON },
  79 #endif
  80
  81 #if !defined (NAME_MAX) && defined (MAXNAMLEN)
  82 #define NAME_MAX MAXNAMLEN
  83 #endif
  84 #ifndef NAME_MAX
  85 #define NAME_MAX        255     /* XXX ? */
  86 #endif
  87     { "NAME_MAX", NAME_MAX },
  88
  89 #if !defined (PATH_MAX) && defined (MAXPATHLEN)
  90 #define PATH_MAX MAXPATHLEN
  91 #endif
  92 #ifdef PATH_MAX
  93     { "PATH_MAX", PATH_MAX },
  94 #endif
  95
  96 #if !defined (SYMLOOP_MAX) && defined (MAXSYMLINKS)
  97 #define SYMLOOP_MAX MAXSYMLINKS
  98 #endif
  99 #ifdef SYMLOOP_MAX
 100     { "SYMLOOP_MAX", SYMLOOP_MAX },
 101 #endif
 102
 103     { NULL, 0 }
 104   };
 105
 106 int
 107 main()
 108 {
 109   extern char *ctime ();
 110   extern time_t time ();
 111   time_t now = time ((time_t *) NULL);
 112   register struct param *p;
 113
 114   if (! params[0].name)
 115     /* We have no information to give, so let the caller know.  */
 116     exit (1);
 117
 118   printf ("\
 119 /* Implementation-specific limits.\n\
 120    Generated at %.24s.  */\n\n", ctime (&now));
 121
 122   for (p = params; p->name != NULL; ++p)
 123     printf ("#define %s %d\n", p->name, p->value);
 124
 125   exit (0);
 126 }