2007-02-21  Ulrich Drepper  <drepper@redhat.com>

	[BZ #4076]
	* io/ftw.c (ftw_startup): Handle special case of FTW_CHDIR in /.
	(open_dir_stream): Likewise.
	* io/Makefile (tests): Add bug-ftw5.
	* io/bug-ftw5.c: New file.

--- libc/io/ftw.c	10 May 2006 06:35:59 -0000	1.54
+++ libc/io/ftw.c	21 Feb 2007 09:36:15 -0000	1.55
@@ -348,8 +348,17 @@ open_dir_stream (int *dfdp, struct ftw_d
 	}
       else
 	{
-	  const char *name = ((data->flags & FTW_CHDIR)
-			      ? data->dirbuf + data->ftw.base: data->dirbuf);
+	  const char *name;
+
+	  if (data->flags & FTW_CHDIR)
+	    {
+	      name = data->dirbuf + data->ftw.base;
+	      if (name[0] == '\0')
+		name = ".";
+	    }
+	  else
+	    name = data->dirbuf;
+
 	  dirp->stream = __opendir (name);
 	}
 
@@ -721,9 +730,16 @@ ftw_startup (const char *dir, int is_nft
   /* Get stat info for start directory.  */
   if (result == 0)
     {
-      const char *name = ((data.flags & FTW_CHDIR)
-			  ? data.dirbuf + data.ftw.base
-			  : data.dirbuf);
+      const char *name;
+
+      if (data.flags & FTW_CHDIR)
+	{
+	  name = data.dirbuf + data.ftw.base;
+	  if (name[0] == '\0')
+	    name = ".";
+	}
+      else
+	name = data.dirbuf;
 
       if (((flags & FTW_PHYS)
 	   ? LXSTAT (_STAT_VER, name, &st)
--- libc/io/Makefile	5 Dec 2006 21:26:11 -0000	1.68
+++ libc/io/Makefile	21 Feb 2007 09:35:36 -0000	1.69
@@ -66,7 +66,7 @@ tests		:= test-utime test-stat test-stat
 		   tst-openat tst-unlinkat tst-fstatat tst-futimesat \
 		   tst-renameat tst-fchownat tst-fchmodat tst-faccessat \
 		   tst-symlinkat tst-linkat tst-readlinkat tst-mkdirat \
-		   tst-mknodat tst-mkfifoat tst-ttyname_r
+		   tst-mknodat tst-mkfifoat tst-ttyname_r bug-ftw5
 
 distribute	:= ftwtest-sh
 
--- libc/io/bug-ftw5.c	1 Jan 1970 00:00:00 -0000
+++ libc/io/bug-ftw5.c	21 Feb 2007 09:35:26 -0000	1.1
@@ -0,0 +1,25 @@
+#include <errno.h>
+#include <ftw.h>
+#include <stdio.h>
+
+static int
+fn (const char *file, const struct stat *sb, int flag, struct FTW *s)
+{
+  puts (file);
+  return FTW_STOP;
+}
+
+static int
+do_test (void)
+{
+  if (nftw ("/", fn, 0, FTW_CHDIR | FTW_ACTIONRETVAL) < 0)
+    {
+      printf ("nftw / FTW_CHDIR: %m\n");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"