127.0.0.1 - - [05/May/2011:10:54:07 +0800] "OPTIONS * HTTP/1.0" 200 -     127.0.0.1 - - [05/May/2011:10:54:08 +0800] "OPTIONS * HTTP/1.0" 200 -     127.0.0.1 - - [05/May/2011:10:54:09 +0800] "OPTIONS * HTTP/1.0" 200 -     127.0.0.1 - - [05/May/2011:10:54:10 +0800] "OPTIONS * HTTP/1.0" 200 -

static apr_status_t pod_signal_internal(ap_pod_t *pod)     {         apr_status_t rv;         char char_of_death = '!';         apr_size_t one = 1;              rv = apr_file_write(pod->pod_out, &char_of_death, &one);         if (rv != APR_SUCCESS) {             ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf,                          "write pipe_of_death");         }              return rv;     }

static apr_status_t dummy_connection(ap_pod_t *pod)     {     //...有省略         /* Create the request string. We include a User-Agent so that          * adminstrators can track down the cause of the odd-looking          * requests in their logs.          */         srequest = apr_pstrcat(p, "OPTIONS * HTTP/1.0rnUser-Agent: ",                                ap_get_server_banner(),                                " (internal dummy connection)rnrn", NULL);     //...有省略     }

static void child_main(int child_num_arg)     {     //...有省略              while (!die_now && !shutdown_pending) {     //...有省略             //1. listen             //2. accept             //3. process request                  /* Check the pod and the generation number after processing a              * connection so that we'll go away if a graceful restart occurred              * while we were processing the connection or we are the lucky              * idle server process that gets to die.              */             if (ap_mpm_pod_check(pod) == APR_SUCCESS) { /* selected as idle? */                 die_now = 1;             }     //...有省略        }     //...有省略     }