libdiskfs: add fsys_get_source

Add a user overridable function diskfs_get_source with a default
implementation returning EOPNOTSUPP. Add a server function for
fsys-get-source.

* libdiskfs/Makefile: Add fsys-get-source.c and get-source.c
* libdiskfs/diskfs.h: Add diskfs_get_source.
* libdiskfs/fsys-get-source.c: New file.
* libdiskfs/get-source.c: Likewise.

1 files changed, 28 insertions, 0 deletions

diff --git a/libdiskfs/get-source.c b/libdiskfs/get-source.c
new file mode 100644
index 00000000..d0c143be
--- /dev/null
+++ b/libdiskfs/get-source.c
@@ -0,0 +1,28 @@
+/* Default version of diskfs_get_source
+
+   Copyright (C) 2013 Free Software Foundation, Inc.
+
+   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "priv.h"
+
+error_t
+diskfs_get_source (char *source)
+{
+  return EOPNOTSUPP;
+}