sysdeps/unix/sysv/linux/seekdir.c

   1 /* Copyright (C) 1991-2021 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stddef.h>
  20 #include <dirent.h>
  21 #include <unistd.h>
  22 #include <dirstream.h>
  23
  24 /* Seek to position POS in DIRP.  */
  25 /* XXX should be __seekdir ? */
  26 void
  27 seekdir (DIR *dirp, long int pos)
  28 {
  29   __libc_lock_lock (dirp->lock);
  30   (void) __lseek (dirp->fd, pos, SEEK_SET);
  31   dirp->size = 0;
  32   dirp->offset = 0;
  33   dirp->filepos = pos;
  34   __libc_lock_unlock (dirp->lock);
  35 }