Drop into debug shell when files could not be copied into tmpfs

ChangeLog

@@ -5,6 +5,10 @@
 # Distributed under the GPL v2
 # $Id$
 
+  16 Mar 2012; Sebastian Pipping <sping@gentoo.org> defaults/initrd.scripts,
+  defaults/linuxrc:
+  Drop into debug shell when files could not be copied into tmpfs
+
   16 Mar 2012; Sebastian Pipping <sping@gentoo.org> defaults/initrd.scripts,
   defaults/linuxrc:
   Improve handling of missing /etc/fstab

defaults/linuxrc

@@ -701,7 +701,10 @@ then
 
 	good_msg "Copying read-write image contents to tmpfs"
 	# Copy over stuff that should be writable
-	(cd "${NEW_ROOT}/${FS_LOCATION}"; cp -a ${ROOT_TREES} "${NEW_ROOT}")
+	(cd "${NEW_ROOT}/${FS_LOCATION}"; cp -a ${ROOT_TREES} "${NEW_ROOT}") || {
+		bad_msg "Copying failed, dropping into a shell."
+		do_rundebugshell
+	}
 
 	# Now we do the links.
 	for x in ${ROOT_LINKS}