/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <ansidecl.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <bsddir.h>

/* Open a directory stream on NAME.  */
DIR *
DEFUN(opendir, (name), CONST char *name)
{
  DIR *dirp;
  struct stat statbuf;
  int fd;

  fd = __open (name, O_RDONLY);
  if (fd < 0)
    return NULL;

  if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
    return NULL;

  dirp = (DIR *) malloc(sizeof(DIR) + NAME_MAX);
  if (dirp == NULL)
    {
      int save = errno;
      (void) __close(fd);
      errno = save;
      return NULL;
    }

  if (__fstat(fd, &statbuf) < 0 || statbuf.st_blksize < sizeof(struct direct))
    dirp->__allocation = sizeof(struct direct);
  else
    dirp->__allocation = statbuf.st_blksize;
  dirp->__data = (char *) malloc(dirp->__allocation);
  if (dirp->__data == NULL)
    {
      int save = errno;
      free((PTR) dirp);
      (void) __close(fd);
      errno = save;
      return NULL;
    }

  dirp->__fd = fd;
  dirp->__offset = 0;
  dirp->__size = 0;
  return dirp;
}
