サーバエラーが帰ってきても、curlの戻り値は0 $ curl -Is http://ozuma.sakura.ne.jp/httpstatus/500 HTTP/1.1 500 Internal Server Error Server: nginx Date: Tue, 04 Feb 2020 00:51:35 GMT Content-Type: text/html; charset=utf-8 Connection: keep-al…