delete trailing whitespace from control files

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

diff --git a/lib/save-cwd.c b/lib/save-cwd.c
index 7394d50acce33b67a4b6351552d79ba7c799370e..1de4fb36293ca775cb53b672842e5a94bca670d8 100644 (file)
--- a/lib/save-cwd.c
+++ b/lib/save-cwd.c
@@ -1,6 +1,6 @@
 /* save-cwd.c -- Save and restore current working directory.
 
-   Copyright (C) 1995, 1997-1998, 2003-2006, 2009-2010 Free Software
+   Copyright (C) 1995, 1997-1998, 2003-2006, 2009-2018 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -14,7 +14,7 @@
    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/>.  */
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering.  */
 
@@ -30,7 +30,6 @@
 
 #include "chdir-long.h"
 #include "unistd--.h"
-#include "xgetcwd.h"
 
 #if GNULIB_FCNTL_SAFER
 # include "fcntl--.h"
@@ -38,31 +37,20 @@
 # define GNULIB_FCNTL_SAFER 0
 #endif
 
-/* 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;
+   space using malloc (via getcwd) 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
+   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.
+   getcwd if necessary.  This module works for most cases with just
+   the getcwd-lgpl module, but to be truly robust, use the getcwd module.
 
    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
@@ -75,12 +63,12 @@ save_cwd (struct saved_cwd *cwd)
 {
   cwd->name = NULL;
 
-  cwd->desc = open (".", O_RDONLY);
+  cwd->desc = open (".", O_SEARCH | O_CLOEXEC);
   if (!GNULIB_FCNTL_SAFER)
-    cwd->desc = fd_safer (cwd->desc);
+    cwd->desc = fd_safer_flag (cwd->desc, O_CLOEXEC);
   if (cwd->desc < 0)
     {
-      cwd->name = xgetcwd ();
+      cwd->name = getcwd (NULL, 0);
       return cwd->name ? 0 : -1;
     }