Add CBS_FAIL to enum callback_status

1 files changed, 2 insertions, 0 deletions

diff --git a/proc.h b/proc.h
index 949bbe7..84241bf 100644
--- a/proc.h
+++ b/proc.h
@@ -38,6 +38,8 @@ struct library;
 enum callback_status {
 	CBS_STOP, /* The iteration should stop.  */
 	CBS_CONT, /* The iteration should continue.  */
+	CBS_FAIL, /* There was an error.  The iteration should stop
+		   * and return error.  */
 };
 
 struct event_handler {