From 31a92bd8bd8a5f401586552b4485a7bb02c332ed Mon Sep 17 00:00:00 2001
From: Vreixo Formoso <metalpain2002@yahoo.es>
Date: Sat, 1 Mar 2008 17:12:27 +0100
Subject: [PATCH] Ensure filters are only applied to repeatable Streams.

---
 libisofs/filter.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libisofs/filter.c b/libisofs/filter.c
index 90f2b84..a7f2be6 100644
--- a/libisofs/filter.c
+++ b/libisofs/filter.c
@@ -33,6 +33,12 @@ int iso_file_add_filter(IsoFile *file, FilterContext *filter, int flag)
     }
     
     original = file->stream;
+
+    if (!iso_stream_is_repeatable(original)) {
+        /* TODO use custom error */
+        return ISO_WRONG_ARG_VALUE;
+    }
+    
     ret = filter->get_filter(filter, original, &filtered);
     if (ret < 0) {
         return ret;