c_cpp/etc/calc/have_ustat.c

   1 /*
   2  * have_ustat - Determine if we have ustat()
   3  *
   4  * Copyright (C) 1999  Landon Curt Noll
   5  *
   6  * Calc is open software; you can redistribute it and/or modify it under
   7  * the terms of the version 2.1 of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation.
   9  *
  10  * Calc is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
  13  * Public License for more details.
  14  *
  15  * A copy of version 2.1 of the GNU Lesser General Public License is
  16  * distributed with calc under the filename COPYING-LGPL.  You should have
  17  * received a copy with calc; if not, write to Free Software Foundation, Inc.
  18  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * @(#) $Revision: 30.1 $
  21  * @(#) $Id: have_ustat.c,v 30.1 2007/03/16 11:09:46 chongo Exp $
  22  * @(#) $Source: /usr/local/src/bin/calc/RCS/have_ustat.c,v $
  23  *
  24  * Under source code control:   1999/10/20 22:51:13
  25  * File existed as early as:    1999
  26  *
  27  * chongo <was here> /\oo/\     http://www.isthe.com/chongo/
  28  * Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
  29  */
  30
  31 /*
  32  * usage:
  33  *      have_ustat
  34  *
  35  * Not all systems have the ustat() function, so this may not
  36  * compile on your system.
  37  *
  38  * This prog outputs several defines:
  39  *
  40  *      HAVE_USTAT
  41  *              defined ==> use ustat()
  42  *              undefined ==> do not call or cannot call ustat()
  43  */
  44
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include <ustat.h>
  49
  50 int
  51 main(void)
  52 {
  53 #if defined(HAVE_NO_USTAT)
  54
  55         printf("#undef HAVE_USTAT /* no */\n");
  56
  57 #else /* HAVE_NO_USTAT */
  58
  59         struct stat stat_dot;           /* stat of "." */
  60         struct ustat ustat_dot;         /* usage stat of "." */
  61
  62         (void) stat(".", &stat_dot);
  63         (void) ustat(stat_dot.st_dev, &ustat_dot);
  64
  65         printf("#define HAVE_USTAT /* yes */\n");
  66
  67 #endif /* HAVE_NO_USTAT */
  68
  69         /* exit(0); */
  70         return 0;
  71 }