Change VFS.open to have optional bufsize argument

2 files changed, 2 insertions, 2 deletions

diff --git a/obnamlib/vfs.py b/obnamlib/vfs.py
index 215ec33f..3f71daac 100644
--- a/obnamlib/vfs.py
+++ b/obnamlib/vfs.py
@@ -231,7 +231,7 @@ class VirtualFileSystem(object):
     def symlink(self, source, destination):
         '''Like os.symlink.'''
 
-    def open(self, pathname, mode):
+    def open(self, pathname, mode, bufsize=None):
         '''Open a file, like the builtin open() or file() function.
 
         The return value is a file object like the ones returned
diff --git a/obnamlib/vfs_local.py b/obnamlib/vfs_local.py
index f1896aea..6e023b13 100644
--- a/obnamlib/vfs_local.py
+++ b/obnamlib/vfs_local.py
@@ -328,7 +328,7 @@ class LocalFS(obnamlib.VirtualFileSystem):
         os.symlink(existing, self.join(new))
         self.maybe_crash()
 
-    def open(self, pathname, mode):
+    def open(self, pathname, mode, bufsize=None):
         tracing.trace('pathname=%s', pathname)
         tracing.trace('mode=%s', mode)
         f = LocalFSFile(self.join(pathname), mode)