Add transmission methods

1 files changed, 2 insertions, 0 deletions

diff --git a/program.h b/program.h
index 4c93066..e910b78 100644
--- a/program.h
+++ b/program.h
@@ -4,6 +4,8 @@
 /* Return 0 if you want to continue reading. @data is null-terminated */
 typedef int (*ProgramOutputCallback)(char *data, int size, void *userdata);
 
+int program_empty_callback(char *data, int size, void *userdata);
+
 /*
     @args need to have at least 2 arguments. The first which is the program name
     and the last which is NULL, which indicates end of args