Imported Upstream version 1.23

[debian/tar] / lib / save-cwd.c

diff --git a/lib/save-cwd.c b/lib/save-cwd.c
deleted file mode 100644 (file)
index e158e8b..0000000
--- a/lib/save-cwd.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/* save-cwd.c -- Save and restore current working directory.
-
-   Copyright (C) 1995, 1997, 1998, 2003, 2004, 2005, 2006 Free
-   Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program 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 General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-/* Written by Jim Meyering.  */
-
-#include <config.h>
-
-#include "save-cwd.h"
-
-#include <errno.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include "chdir-long.h"
-#include "fcntl--.h"
-#include "xgetcwd.h"
-
-/* On systems without the fchdir function (WOE), pretend that open
-   always returns -1 so that save_cwd resorts to using xgetcwd.
-   Since chdir_long requires fchdir, use chdir instead.  */
-#if !HAVE_FCHDIR
-# undef open
-# define open(File, Flags) (-1)
-# undef fchdir
-# define fchdir(Fd) (abort (), -1)
-# undef chdir_long
-# define chdir_long(Dir) chdir (Dir)
-#endif
-
-/* Record the location of the current working directory in CWD so that
-   the program may change to other directories and later use restore_cwd
-   to return to the recorded location.  This function may allocate
-   space using malloc (via xgetcwd) or leave a file descriptor open;
-   use free_cwd to perform the necessary free or close.  Upon failure,
-   no memory is allocated, any locally opened file descriptors are
-   closed;  return non-zero -- in that case, free_cwd need not be
-   called, but doing so is ok.  Otherwise, return zero.
-
-   The `raison d'etre' for this interface is that the working directory
-   is sometimes inaccessible, and getcwd is not robust or as efficient.
-   So, we prefer to use the open/fchdir approach, but fall back on
-   getcwd if necessary.
-
-   Some systems lack fchdir altogether: e.g., OS/2, pre-2001 Cygwin,
-   SCO Xenix.  Also, SunOS 4 and Irix 5.3 provide the function, yet it
-   doesn't work for partitions on which auditing is enabled.  If
-   you're still using an obsolete system with these problems, please
-   send email to the maintainer of this code.  */
-
-int
-save_cwd (struct saved_cwd *cwd)
-{
-  cwd->name = NULL;
-
-  cwd->desc = open (".", O_RDONLY);
-  if (cwd->desc < 0)
-    {
-      cwd->name = xgetcwd ();
-      return cwd->name ? 0 : -1;
-    }
-
-  return 0;
-}
-
-/* Change to recorded location, CWD, in directory hierarchy.
-   Upon failure, return -1 (errno is set by chdir or fchdir).
-   Upon success, return zero.  */
-
-int
-restore_cwd (const struct saved_cwd *cwd)
-{
-  if (0 <= cwd->desc)
-    return fchdir (cwd->desc);
-  else
-    return chdir_long (cwd->name);
-}
-
-void
-free_cwd (struct saved_cwd *cwd)
-{
-  if (cwd->desc >= 0)
-    close (cwd->desc);
-  free (cwd->name);
-}