Document ul_log_domain_arg2levels()

diff --git a/ulut/ul_logreg.c b/ulut/ul_logreg.c
index 6f63d95eb8586ed0f69beba222690b4d4ae9064d..4dd6ebef48900cd7d32ebdef468a33f4d47a7666 100644 (file)
--- a/ulut/ul_logreg.c
+++ b/ulut/ul_logreg.c
@@ -128,6 +128,12 @@ int ul_log_domain_getlevel(const char *name)
 #define UL_MAX_DOMAIN_NAME 20
 #endif /*UL_MAX_DOMAIN_NAME*/
 
+/* Argument syntax:
+ *
+ * <arg> := <assignment> | <arg> (':' | ',') <assignment>
+ * <assignment> := [ <domain> ('.' | '=') ] NUMBER
+ * <domain> := ( IDENTIFIER | "all" | "ALL" )
+ */
 int ul_log_domain_arg2levels(const char *arg)
 {
   const char *p=arg;