feat: add help option

check_mysql_query_count/check_mysql_query_count.go

@@ -11,6 +11,7 @@ import (
 
 // Option to parse
 var (
+  HELP     = flag.Bool("help", false, "print the help message")
   HOSTNAME = flag.String("hostname", "localhost", "mysql hostname")
   PORT     = flag.Int("port", 3306, "mysql port")
   USERNAME = flag.String("username", "", "mysql username")
@@ -24,6 +25,11 @@ var (
 func init() {
   flag.Parse()
 
+  if *HELP {
+    flag.PrintDefaults()
+    os.Exit(3)
+  }
+
   if *QUERY == "" {
     Critical("Please set query option")
   }
@@ -87,4 +93,3 @@ func main() {
 
   Ok(msg)
 }
-