trailer: have function to describe trailer layout

diff --git a/usage.c b/usage.c
index 0efa3faf601231db35239161a1a7253b3975b3f8..17f52c1b5ce631eed1cdf3447d80e7223a2e6f01 100644 (file)
--- a/usage.c
+++ b/usage.c
@@ -70,6 +70,21 @@ void set_error_routine(void (*routine)(const char *err, va_list params))
        error_routine = routine;
 }
 
+void (*get_error_routine(void))(const char *err, va_list params)
+{
+       return error_routine;
+}
+
+void set_warn_routine(void (*routine)(const char *warn, va_list params))
+{
+       warn_routine = routine;
+}
+
+void (*get_warn_routine(void))(const char *warn, va_list params)
+{
+       return warn_routine;
+}
+
 void set_die_is_recursing_routine(int (*routine)(void))
 {
        die_is_recursing = routine;