1 files changed, 17 insertions, 2 deletions

diff --git a/src/filter.cpp b/src/filter.cpp
index 693fb9f..96a8694 100644
--- a/src/filter.cpp
+++ b/src/filter.cpp
@@ -50,6 +50,11 @@ bool Bu::Filter::isEOS()
         return rNext.isEOS();
 }
 
+bool Bu::Filter::isOpen()
+{
+        return rNext.isOpen();
+}
+
 bool Bu::Filter::canRead()
 {
         return rNext.canRead();
@@ -60,9 +65,19 @@ bool Bu::Filter::canWrite()
         return rNext.canWrite();
 }
 
-bool Bu::Filter::canSeek()
+bool Bu::Filter::isReadable()
+{
+        return rNext.isReadable();
+}
+
+bool Bu::Filter::isWritable()
+{
+        return rNext.isWritable();
+}
+
+bool Bu::Filter::isSeekable()
 {
-        return rNext.canSeek();
+        return rNext.isSeekable();
 }
 
 bool Bu::Filter::isBlocking()