1 files changed, 45 insertions, 0 deletions
diff --git a/io/getdirname.c b/io/getdirname.c
new file mode 100644
index 0000000000..733745b584
--- /dev/null
+++ b/io/getdirname.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Return a malloc'd string containing the current directory name.
+   If the environment variable `PWD' is set, and its value is correct,
+   that value is used.  */
+
+char *
+DEFUN_VOID(get_current_dir_name)
+{
+  char *pwd;
+  struct stat dotstat, pwdstat;
+
+  pwd = getenv ("PWD");
+  if (pwd != NULL &&
+      stat (".", &dotstat) == 0 &&
+      stat (pwd, &pwdstat) == 0 &&
+      pwdstat.st_dev == dotstat.st_dev &&
+      pwdstat.st_ino == dotstat.st_ino)
+    /* The PWD value is correct.  Use it.  */
+    return strdup (pwd);
+
+  return getcwd ((char *) NULL, 0);
+}