change attach to use exceptions instead of error strings

1 files changed, 3 insertions, 2 deletions

diff --git a/src/main/kotlin/ProtocolTranslator.kt b/src/main/kotlin/ProtocolTranslator.kt
index eb13fc2..1b45252 100644
--- a/src/main/kotlin/ProtocolTranslator.kt
+++ b/src/main/kotlin/ProtocolTranslator.kt
@@ -55,9 +55,10 @@ interface ProtocolTranslator {
      * @param afid A FID previously established by an auth message.
      * @param uname A user identifier.
      * @param aname The desired file tree to access.
-     * @return a possible error.
+     * @throws except.InvalidMessageException if the received message is invalid.
+     * @throws except.RErrorException if the received message is an R-error message.
      */
-    fun attach(fid: UInt, afid: UInt, uname: String, aname: String): String?
+    fun attach(fid: UInt, afid: UInt, uname: String, aname: String)
 
     /**
      * Descend a directory hierarchy.