MySQL:如何编写daemon plugin(15)

        return 1; 

    } 

    get_date(time_str, GETDATE_DATE_TIME, 0); 

    sprintf(buffer, "Monitoring started at%s\n", time_str); 

    write(monitoring_file, buffer,strlen(buffer)); 

    pthread_attr_init(&attr); 

    pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_JOINABLE); 

    if (pthread_create(&monitoring_thread,&attr, 

                monitoring, NULL) != 0){ 

        fprintf(stderr, "Plugin'monitoring': " 

                "Could not create monitoringthread!\n"); 

        return 1; 

    } 

    return 0; 

} 

/*卸载插件时调用*/ 

static intmonitoring_plugin_deinit(void *p) 

{ 

    char buffer[MONITORING_BUFFER]; 

char time_str[20]; 

/*通知后台线程结束*/ 

    pthread_cancel(monitoring_thread); 

    pthread_join(monitoring_thread, NULL); 

    get_date(time_str, GETDATE_DATE_TIME, 0); 

    sprintf(buffer, "Monitoring stopped at%s\n", time_str); 

    write(monitoring_file, buffer,strlen(buffer)); 

    close(monitoring_file); 

    return 0; 

} 

struct st_mysql_daemonmonitoring_plugin = { MYSQL_DAEMON_INTERFACE_VERSION }; 

/*声明插件*/ 

mysql_declare_plugin(monitoring) 

{ 

    MYSQL_DAEMON_PLUGIN, 

    &monitoring_plugin, 

    "monitoring", 

    "yinfeng", 

    "a daemon montor,log process usagestate", 

    PLUGIN_LICENSE_GPL, 

    monitoring_plugin_init, 

    monitoring_plugin_deinit, 

    0x0100, 

    sys_status_var, 

    vars_system_var, 

    NULL