replace wlan0 to sysgo.WifiDev

move execCmd to UI.ExecCmd

add read app-local.ini in config.go for dev/ run launcher out of
GameShell

sysgo/UI/main_screen.go

@@ -364,10 +364,8 @@ func (self *MainScreen) IsWifiConnectedNow() bool {
 func (self *MainScreen) GetWirelessIP() string {
 
   cli := fmt.Sprintf( "ip -4 addr show %s | grep -oP '(?<=inet\\s)\\d+(\\.\\d+){3}'",sysgo.WifiDev)
-  out := System(cli)
-  if len(out) > 5 {
-		out = strings.TrimSuffix(out,"\n")
-	}
+  out := SystemTrim(cli)
+
 	
   return out	
 }

sysgo/UI/util_funcs.go

@@ -286,3 +286,17 @@ func SystemTrim(cmd string) string {
 
   return strings.Trim(ret,"\r\n")
 }
+
+func cmdEnv() []string {
+	return []string{"LANG=C", "LC_ALL=C"}
+}
+
+func ExecCmd(cmdArgs []string) ([]byte, error) {
+	cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	cmd.Env = append(os.Environ(), cmdEnv()...)
+	out, err := cmd.Output()
+	if err != nil {
+		err = fmt.Errorf(`failed to execute "%v" (%+v)`, strings.Join(cmdArgs, " "), err)
+	}
+	return out, err
+}