Don't apply file transformations to volume names.

* src/list.c (decode_header): Don't apply file transformations to volume names.
* tests/xform01.at: New testcase.
* tests/xform-h.at (xform): Rename macro to xformtest. Use pushdef/popdef.
* tests/Makefile.am, tests/testsuite.at: Add xform01.at

src/list.c

@@ -656,6 +656,10 @@ decode_header (union block *header, struct tar_stat_info *stat_info,
 	stat_info->is_dumpdir = true;
     }
 
+  if (header->header.typeflag == GNUTYPE_VOLHDR)
+    /* Name transformations don't apply to volume headers. */
+    return;
+  
   transform_member_name (&stat_info->file_name, XFORM_REGFILE);
   switch (header->header.typeflag)
     {

tests/Makefile.am

@@ -150,6 +150,7 @@ TESTSUITE_AT = \
  verbose.at\
  version.at\
  xform-h.at\
+ xform01.at\
  star/gtarfail.at\
  star/gtarfail2.at\
  star/multi-fail.at\

tests/testsuite.at

@@ -123,6 +123,7 @@ m4_include([append01.at])
 m4_include([append02.at])
 
 m4_include([xform-h.at])
+m4_include([xform01.at])
 
 m4_include([exclude.at])
 m4_include([exclude01.at])

tests/xform-h.at

@@ -1,7 +1,7 @@
 # Process this file with autom4te to create testsuite. -*- Autotest -*-
 
 # Test suite for GNU tar.
-# Copyright (C) 2009 Free Software Foundation, Inc.
+# Copyright (C) 2009, 2010 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
@@ -30,7 +30,7 @@
 AT_SETUP([transforming hard links on create])
 AT_KEYWORDS([transform xform xform-h])
 
-m4_define([xform],[
+m4_pushdef([xformtest],[
 echo "$1"
 tar cf archive --transform="s,^basedir/,,$2" basedir/test basedir/test_link
 tar tvf archive | sed -n 's/.*test_link link to //p'
@@ -41,9 +41,9 @@ mkdir basedir
 echo "hello" > basedir/test
 ln basedir/test basedir/test_link
 
-xform(Default transform scope)
-xform(Transforming hard links,h)
-xform(Not transforming hard links,H)
+xformtest(Default transform scope)
+xformtest(Transforming hard links,h)
+xformtest(Not transforming hard links,H)
 ],
 [0],
 [Default transform scope
@@ -54,6 +54,8 @@ Not transforming hard links
 basedir/test
 ])
 
+m4_popdef([xformtest])
+
 AT_CLEANUP
 
 # End of xform-h.at

tests/xform01.at

@@ -0,0 +1,43 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright (C) 2010 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
+# the Free Software Foundation; either version 3, 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
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# 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., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+# Transformations should not apply to GNU volume labels.
+# Reported by: Thomas Graf <hausmeister@askja.de>
+# References: <4C72AB8D.3070706@askja.de>
+#             http://lists.gnu.org/archive/html/bug-tar/2010-08/msg00035.html
+
+AT_SETUP([transformations and GNU volume labels])
+AT_KEYWORDS([transform xform xform01 volume])
+
+AT_TAR_CHECK([
+genfile --file file
+tar -cf archive.tar -V /label/ file
+tar tf archive.tar
+],
+[0],
+[/label/
+file
+],
+[],[],[],[gnu])
+
+AT_CLEANUP
+
+
+