sysdeps/mach/hurd/opendir.c

   1 /* Copyright (C) 1993, 1994, 1995, 1996 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <stddef.h>
  23 #include <stdlib.h>
  24 #include <dirent.h>
  25 #include <fcntl.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <unistd.h>
  29 #include <stdio.h>
  30 #include <hurd.h>
  31 #include <hurd/fd.h>
  32 #include "dirstream.h"
  33
  34
  35 /* Open a directory stream on NAME.  */
  36 DIR *
  37 DEFUN(opendir, (name), CONST char *name)
  38 {
  39   DIR *dirp;
  40   int fd;
  41   struct hurd_fd *d;
  42
  43   fd = __open (name, O_RDONLY);
  44   if (fd < 0)
  45     return NULL;
  46
  47   dirp = (DIR *) malloc (sizeof (DIR));
  48   if (dirp == NULL)
  49     {
  50       __close (fd);
  51       return NULL;
  52     }
  53
  54   /* Extract the pointer to the descriptor structure.  */
  55   __mutex_lock (&_hurd_dtable_lock);
  56   d = dirp->__fd = _hurd_dtable[fd];
  57   __mutex_unlock (&_hurd_dtable_lock);
  58
  59   /* Set the descriptor to close on exec. */
  60   __spin_lock (&d->port.lock);
  61   d->flags |= FD_CLOEXEC;
  62   __spin_unlock (&d->port.lock);
  63
  64   dirp->__data = dirp->__ptr = NULL;
  65   dirp->__entry_data = dirp->__entry_ptr = 0;
  66   dirp->__allocation = 0;
  67   dirp->__size = 0;
  68
  69   __libc_lock_init (dirp->__lock);
  70
  71   return dirp;
  72 }