2001-02-25 Roland McGrath <roland@frob.com>

	* readonly-changed.c: New file.
	* Makefile (OTHERSRCS): Add it.

2 files changed, 35 insertions, 3 deletions

diff --git a/libdiskfs/Makefile b/libdiskfs/Makefile
index 9180c74d..56cba641 100644
--- a/libdiskfs/Makefile
+++ b/libdiskfs/Makefile
@@ -1,5 +1,5 @@
 #
-#   Copyright (C) 1994,95,96,97,98,99,2000 Free Software Foundation, Inc.
+#   Copyright (C) 1994,95,96,97,98,99,2000, 2001 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
@@ -46,10 +46,11 @@ OTHERSRCS = conch-fetch.c conch-set.c dir-clear.c dir-init.c dir-renamed.c \
 	sync-interval.c sync-default.c \
 	opts-set.c opts-get.c opts-std-startup.c opts-std-runtime.c \
         opts-append-std.c opts-common.c opts-runtime.c opts-version.c \
-	trans-callback.c readonly.c remount.c console.c disk-pager.c \
+	trans-callback.c readonly.c readonly-changed.c \
+	remount.c console.c disk-pager.c \
 	name-cache.c direnter.c dirrewrite.c dirremove.c lookup.c dead-name.c \
 	validate-mode.c validate-group.c validate-author.c validate-flags.c \
-	validate-rdev.c validate-owner.c extra-version.c 
+	validate-rdev.c validate-owner.c extra-version.c
 SRCS = $(OTHERSRCS) $(FSSRCS) $(IOSRCS) $(FSYSSRCS) $(IFSOCKSRCS)
 LCLHDRS = diskfs.h priv.h lithp.h fsmutations.h diskfs-pager.h fhandle.h
 installhdrs = diskfs.h diskfs-pager.h
diff --git a/libdiskfs/readonly-changed.c b/libdiskfs/readonly-changed.c
new file mode 100644
index 00000000..44ee9225
--- /dev/null
+++ b/libdiskfs/readonly-changed.c
@@ -0,0 +1,31 @@
+/* Default hook for change to/from read-only
+
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+   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 this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "diskfs.h"
+
+/* The user may define this function.  It is called when the disk has been
+   changed from read-only to read-write mode or vice-versa.  READONLY is the
+   new state (which is also reflected in DISKFS_READONLY).  This function is
+   also called during initial startup if the filesystem is to be writable.  */
+void
+diskfs_readonly_changed (int readonly)
+{
+  /* By default do nothing at all.  */
+}