sysdeps/unix/fdopendir.c

   1 /* Copyright (C) 2005 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 <dirent.h>
  20 #include <errno.h>
  21 #include <sys/stat.h>
  22
  23
  24 DIR *
  25 fdopendir (int fd)
  26 {
  27   struct stat64 statbuf;
  28
  29   if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &statbuf), 0) < 0)
  30     return NULL;
  31   if (__builtin_expect (! S_ISDIR (statbuf.st_mode), 0))
  32     {
  33       __set_errno (ENOTDIR);
  34       return NULL;
  35     }
  36
  37   return __alloc_dir (fd, &statbuf);
  38 }