/* save-cwd.c -- Save and restore current working directory.
- Copyright (C) 1995, 1997, 1998, 2003, 2004, 2005 Free Software
+ Copyright (C) 1995, 1997-1998, 2003-2006, 2009-2010 Free Software
Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Jim Meyering. */
-#if HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include <config.h>
#include "save-cwd.h"
+#include <errno.h>
+#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include "chdir-long.h"
+#include "unistd--.h"
+#include "xgetcwd.h"
+#include "cloexec.h"
-#if HAVE_FCNTL_H
-# include <fcntl.h>
+#if GNULIB_FCNTL_SAFER
+# include "fcntl--.h"
#else
-# include <sys/file.h>
+# define GNULIB_FCNTL_SAFER 0
#endif
-#include <errno.h>
-
-#include "chdir-long.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
cwd->name = NULL;
cwd->desc = open (".", O_RDONLY);
+ if (!GNULIB_FCNTL_SAFER)
+ cwd->desc = fd_safer (cwd->desc);
if (cwd->desc < 0)
{
- cwd->desc = open (".", O_WRONLY);
- if (cwd->desc < 0)
- {
- cwd->name = xgetcwd ();
- return cwd->name ? 0 : -1;
- }
+ cwd->name = xgetcwd ();
+ return cwd->name ? 0 : -1;
}
+ set_cloexec_flag (cwd->desc, true);
return 0;
}
{
if (cwd->desc >= 0)
close (cwd->desc);
- if (cwd->name)
- free (cwd->name);
+ free (cwd->name);
}