sysdeps/posix/rewinddir.c

   1 /* Copyright (C) 1991-2018 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stddef.h>
  19 #include <dirent.h>
  20 #include <sys/types.h>
  21 #include <unistd.h>
  22 #include <dirstream.h>
  23
  24 /* Rewind DIRP to the beginning of the directory.  */
  25 void
  26 __rewinddir (DIR *dirp)
  27 {
  28 #if IS_IN (libc)
  29   __libc_lock_lock (dirp->lock);
  30 #endif
  31   (void) __lseek (dirp->fd, (off_t) 0, SEEK_SET);
  32   dirp->filepos = 0;
  33   dirp->offset = 0;
  34   dirp->size = 0;
  35   dirp->errcode = 0;
  36 #if IS_IN (libc)
  37   __libc_lock_unlock (dirp->lock);
  38 #endif
  39 }
  40 libc_hidden_def (__rewinddir)
  41 weak_alias (__rewinddir, rewinddir)