hope i fixed the bug

autoytarchive/cappedio.py

@@ -14,16 +14,22 @@ class CappedBufferedReader(io.BufferedReader):
         return super().read(size)
 
     def seek(self, offset, whence=os.SEEK_SET):
-        if offset == 0 and whence == os.SEEK_END and self.capped_size is not None:
-            if self.capped_size < 0:
-                offset = 0
-            else:
-                real_end = super().seek(0, os.SEEK_END)
-                if self.capped_size > real_end:
-                    offset = real_end
+        if self.capped_size is not NOne:
+            if offset == 0 and whence == os.SEEK_END:
+                if self.capped_size < 0:
+                    offset = 0
                 else:
-                    offset = self.capped_size
-            whence = os.SEEK_SET
+                    real_end = super().seek(0, os.SEEK_END)
+                    if self.capped_size > real_end:
+                        offset = real_end
+                    else:
+                        offset = self.capped_size
+                self.capped_size -= offset
+                whence = os.SEEK_SET
+            elif whence == os.SEEK_SET:
+                current_pos = self.tell()
+                if current_pos > offset:
+                    self.capped_size += current_pos - offset
         return super().seek(offset, whence)
 
     @property