compat/dirfd.c

   1 /*****************************************************************************
   2  * dirfd.c: POSIX dirfd replacement
   3  *****************************************************************************
   4  * Copyright © 2009-2011 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <dirent.h>
  26 #include <errno.h>
  27
  28 int dirfd (DIR *dir)
  29 {
  30 #if defined (__sun__)
  31     return dir->dd_fd;
  32 #elif defined (__APPLE__)
  33     return dir->__dd_fd;
  34 #else
  35     (void) dir;
  36 # ifdef ENOTSUP
  37     errno = ENOTSUP;
  38 # endif
  39     return -1;
  40 #endif
  41 }