/* xgetcwd.c -- return current directory with unlimited length
- Copyright (C) 1992 Free Software Foundation, Inc.
+
+ Copyright (C) 2001, 2003, 2004 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
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Written by David MacKenzie, djm@gnu.ai.mit.edu. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-#ifdef HAVE_CONFIG_H
-#if defined (CONFIG_BROKETS)
-/* We use <config.h> instead of "config.h" so that a compilation
- using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
- (which it would do because it found this file in $srcdir). */
-#include <config.h>
-#else
-#include "config.h"
-#endif
-#endif
+/* Written by Jim Meyering. */
-#include <stdio.h>
-#include <errno.h>
-#ifndef errno
-extern int errno;
+#if HAVE_CONFIG_H
+# include <config.h>
#endif
-#include <sys/types.h>
-#include "pathmax.h"
-#if !defined(_POSIX_VERSION) && !defined(HAVE_GETCWD)
-char *getwd ();
-#define getcwd(buf, max) getwd (buf)
-#else
-char *getcwd ();
-#endif
+#include "xgetcwd.h"
-/* Amount to increase buffer size by in each try. */
-#define PATH_INCR 32
+#include <errno.h>
-char *xmalloc ();
-char *xrealloc ();
-void free ();
+#include "getcwd.h"
+#include "xalloc.h"
-/* Return the current directory, newly allocated, arbitrarily long.
- Return NULL and set errno on error. */
+/* Return the current directory, newly allocated.
+ Upon an out-of-memory error, call xalloc_die.
+ Upon any other type of error, return NULL. */
char *
-xgetcwd ()
+xgetcwd (void)
{
- char *cwd;
- char *ret;
- unsigned path_max;
-
- errno = 0;
- path_max = (unsigned) PATH_MAX;
- path_max += 2; /* The getcwd docs say to do this. */
-
- cwd = xmalloc (path_max);
-
- errno = 0;
- while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE)
- {
- path_max += PATH_INCR;
- cwd = xrealloc (cwd, path_max);
- errno = 0;
- }
-
- if (ret == NULL)
- {
- int save_errno = errno;
- free (cwd);
- errno = save_errno;
- return NULL;
- }
+ char *cwd = getcwd (NULL, 0);
+ if (! cwd && errno == ENOMEM)
+ xalloc_die ();
return cwd;
}