MaxScale/server/modules/routing/debugcmd.c

/*
 * Copyright (c) 2016 MariaDB Corporation Ab
 *
 * Use of this software is governed by the Business Source License included
 * in the LICENSE.TXT file and at www.mariadb.com/bsl.
 *
 * Change Date: 2019-07-01
 *
 * On the date above, in accordance with the Business Source License, use
 * of this software will be governed by version 2 or later of the General
 * Public License.
 */

/**
 * @file debugcmd.c  - The debug CLI command line interpreter
 *
 * The command interpreter for the dbug user interface. The command
 * structure is such that there are a numerb of commands, notably
 * show and a set of subcommands, the things to show in this case.
 *
 * Each subcommand has a handler function defined for it that is passeed
 * the DCB to use to print the output of the commands and up to 3 arguments
 * as numeric values.
 *
 * There are two "built in" commands, the help command and the quit
 * command.
 *
 * @verbatim
 * Revision History
 *
 * Date         Who                     Description
 * 20/06/13     Mark Riddoch            Initial implementation
 * 17/07/13     Mark Riddoch            Additional commands
 * 09/08/13     Massimiliano Pinto      Added enable/disable commands (now only for log)
 * 20/05/14     Mark Riddoch            Added ability to give server and service names rather
 *                                      than simply addresses
 * 23/05/14     Mark Riddoch            Added support for developer and user modes
 * 29/05/14     Mark Riddoch            Add Filter support
 * 16/10/14     Mark Riddoch            Add show eventq
 * 05/03/15     Massimiliano Pinto      Added enable/disable feedback
 * 27/05/15     Martin Brampton         Add show persistent [server]
 * 06/11/15     Martin Brampton         Add show buffers (conditional compilation)
 * 23/05/16     Massimiliano Pinto      'add user' and 'remove user'
 *                                      no longer accept password parameter
 * 27/06/16     Martin Brampton         Modify to work with list manager sessions
 *
 * @endverbatim
 */
#include <my_config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <service.h>
#include <session.h>
#include <router.h>
#include <filter.h>
#include <modules.h>
#include <atomic.h>
#include <server.h>
#include <spinlock.h>
#include <buffer.h>
#include <dcb.h>
#include <maxscale/poll.h>
#include <users.h>
#include <dbusers.h>
#include <maxconfig.h>
#include <telnetd.h>
#include <adminusers.h>
#include <monitor.h>
#include <debugcli.h>
#include <housekeeper.h>
#include <listmanager.h>

#include <skygw_utils.h>
#include <log_manager.h>
#include <sys/syslog.h>

#define MAXARGS 6

#define ARG_TYPE_ADDRESS        1
#define ARG_TYPE_STRING         2
#define ARG_TYPE_SERVICE        3
#define ARG_TYPE_SERVER         4
#define ARG_TYPE_DBUSERS        5
#define ARG_TYPE_SESSION        6
#define ARG_TYPE_DCB            7
#define ARG_TYPE_MONITOR        8
#define ARG_TYPE_FILTER         9
#define ARG_TYPE_NUMERIC        10

extern LIST_CONFIG SESSIONlist;

/**
 * The subcommand structure
 *
 * These are the options that may be passed to a command
 */
struct subcommand {
    char    *arg1;
    int     n_args;
    void    (*fn)();
    char    *help;
    char    *devhelp;
    int     arg_types[3];
};

static void telnetdShowUsers(DCB *);
static void show_log_throttling(DCB *);

/**
 * The subcommands of the show command
 */
struct subcommand showoptions[] = {
#if defined(BUFFER_TRACE)
    { "buffers",	0, dprintAllBuffers,
	  "Show all buffers with backtrace",
      "Show all buffers with backtrace",
      {0, 0, 0} },
#endif
    { "dcblist", 0, dprintDCBList,
      "Show statistics for the list of all descriptor control blocks",    
      "Show statistics for the list of all descriptor control blocks",    
      {0, 0, 0} },
    { "dcbs", 0, dprintAllDCBs,
      "Show all descriptor control blocks (network connections)",
      "Show all descriptor control blocks (network connections)",
      {0, 0, 0} },
    { "dcb", 1, dprintDCB,
      "Show a single descriptor control block e.g. show dcb 0x493340",
      "Show a single descriptor control block e.g. show dcb 0x493340",
      {ARG_TYPE_DCB, 0, 0} },
    { "dbusers", 1, dcb_usersPrint,
      "Show statistics and user names for a service's user table.\n"
      "\t\tExample : show dbusers <service name>",
      "Show statistics and user names for a service's user table.\n"
      "\t\tExample : show dbusers <ptr of 'User's data' from services list>|<service name>",
      {ARG_TYPE_DBUSERS, 0, 0} },
    { "epoll", 0, dprintPollStats,
      "Show the poll statistics",
      "Show the poll statistics",
      {0, 0, 0} },
    { "eventq", 0, dShowEventQ,
      "Show the queue of events waiting to be processed",
      "Show the queue of events waiting to be processed",
      {0, 0, 0} },
    { "eventstats", 0, dShowEventStats,
      "Show the event statistics",
      "Show the event statistics",
      {0, 0, 0} },
    { "feedbackreport", 0, moduleShowFeedbackReport,
      "Show the report of MaxScale loaded modules, suitable for Notification Service",
      "Show the report of MaxScale loaded modules, suitable for Notification Service",
      {0, 0, 0} },
    { "filter", 1, dprintFilter,
      "Show details of a filter, called with a filter name",
      "Show details of a filter, called with the address of a filter",
      {ARG_TYPE_FILTER, 0, 0} },
    { "filters", 0, dprintAllFilters,
      "Show all filters",
      "Show all filters",
      {0, 0, 0} },
    { "log_throttling", 0, show_log_throttling,
      "Show the current log throttling setting (count, window (ms), suppression (ms))",
      "Show the current log throttling setting (count, window (ms), suppression (ms))",
      {0, 0, 0} },
    { "modules", 0, dprintAllModules,
      "Show all currently loaded modules",
      "Show all currently loaded modules",
      {0, 0, 0} },
    { "monitor", 1, monitorShow,
      "Show the monitor details",
      "Show the monitor details",
      {ARG_TYPE_MONITOR, 0, 0} },
    { "monitors", 0, monitorShowAll,
      "Show the monitors that are configured",
      "Show the monitors that are configured",
      {0, 0, 0} },
    { "persistent", 1, dprintPersistentDCBs,
      "Show persistent pool for a named server, e.g. show persistent dbnode1",
      "Show persistent pool for a server, e.g. show persistent 0x485390. "
      "The address may also be replaced with the server name from the configuration file",
      {ARG_TYPE_SERVER, 0, 0} },
    { "server", 1, dprintServer,
      "Show details for a named server, e.g. show server dbnode1",
      "Show details for a server, e.g. show server 0x485390. The address may also be "
      "repalced with the server name from the configuration file",
      {ARG_TYPE_SERVER, 0, 0} },
    { "servers", 0, dprintAllServers,
      "Show all configured servers",
      "Show all configured servers",
      {0, 0, 0} },
    { "serversjson", 0, dprintAllServersJson,
      "Show all configured servers in JSON format",
      "Show all configured servers in JSON format",
      {0, 0, 0} },
    { "services", 0, dprintAllServices,
      "Show all configured services in MaxScale",
      "Show all configured services in MaxScale",
      {0, 0, 0} },
    { "service", 1, dprintService,
      "Show a single service in MaxScale, may be passed a service name",
      "Show a single service in MaxScale, may be passed a service name or address of a service object",
      {ARG_TYPE_SERVICE, 0, 0} },
    { "session", 1, dprintSession,
      "Show a single session in MaxScale, e.g. show session 0x284830",
      "Show a single session in MaxScale, e.g. show session 0x284830",
      {ARG_TYPE_SESSION, 0, 0} },
    { "sessionlist", 0, dprintSessionList,
      "Show statistics for the list of all sessions",    
      "Show statistics for the list of all sessions",    
      {0, 0, 0} },
    { "sessions", 0, dprintAllSessions,
      "Show all active sessions in MaxScale",
      "Show all active sessions in MaxScale",
      {0, 0, 0} },
    { "tasks", 0, hkshow_tasks,
      "Show all active housekeeper tasks in MaxScale",
      "Show all active housekeeper tasks in MaxScale",
      {0, 0, 0} },
    { "threads", 0, dShowThreads,
      "Show the status of the polling threads in MaxScale",
      "Show the status of the polling threads in MaxScale",
      {0, 0, 0} },
    { "users", 0, telnetdShowUsers,
      "Show statistics and user names for the debug interface",
      "Show statistics and user names for the debug interface",
      {0, 0, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

/**
 * The subcommands of the list command
 */
struct subcommand listoptions[] = {
    { "clients", 0, dListClients,
      "List all the client connections to MaxScale",
      "List all the client connections to MaxScale",
      {0, 0, 0} },
    { "dcbs", 0, dListDCBs,
      "List all the DCBs active within MaxScale",
      "List all the DCBs active within MaxScale",
      {0, 0, 0} },
    { "filters", 0, dListFilters,
      "List all the filters defined within MaxScale",
      "List all the filters defined within MaxScale",
      {0, 0, 0} },
    { "listeners", 0, dListListeners,
      "List all the listeners defined within MaxScale",
      "List all the listeners defined within MaxScale",
      {0, 0, 0} },
    { "modules", 0, dprintAllModules,
      "List all currently loaded modules",
      "List all currently loaded modules",
      {0, 0, 0} },
    { "monitors", 0, monitorList,
      "List all monitors",
      "List all monitors",
      {0, 0, 0} },
    { "services", 0, dListServices,
      "List all the services defined within MaxScale",
      "List all the services defined within MaxScale",
      {0, 0, 0} },
    { "servers", 0, dListServers,
      "List all the servers defined within MaxScale",
      "List all the servers defined within MaxScale",
      {0, 0, 0} },
    { "sessions", 0, dListSessions,
      "List all the active sessions within MaxScale",
      "List all the active sessions within MaxScale",
      {0, 0, 0} },
    { "threads", 0, dShowThreads,
      "List the status of the polling threads in MaxScale",
      "List the status of the polling threads in MaxScale",
      {0, 0, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

extern void shutdown_server();
static void shutdown_service(DCB *dcb, SERVICE *service);
static void shutdown_monitor(DCB *dcb, MONITOR *monitor);

/**
 * The subcommands of the shutdown command
 */
struct subcommand shutdownoptions[] = {
    {
        "maxscale",
        0,
        shutdown_server,
        "Shutdown MaxScale",
        "Shutdown MaxScale",
        {0, 0, 0}
    },
    {
        "monitor",
        1,
        shutdown_monitor,
        "Shutdown a monitor, e.g. shutdown monitor 0x48381e0",
        "Shutdown a monitor, e.g. shutdown monitor 0x48381e0",
        {ARG_TYPE_MONITOR, 0, 0}
    },
    {
        "service",
        1,
        shutdown_service,
        "Shutdown a service, e.g. shutdown service \"Sales Database\"",
        "Shutdown a service, e.g. shutdown service 0x4838320 or shutdown service \"Sales Database\"",
        {ARG_TYPE_SERVICE, 0, 0}
    },
    {
        NULL,
        0,
        NULL,
        NULL,
        NULL,
        {0, 0, 0}
    }
};

static void sync_logs(DCB *dcb)
{
    if (mxs_log_flush_sync() == 0)
    {
        dcb_printf(dcb, "Logs flushed to disk\n");
    }
    else
    {
        dcb_printf(dcb, "Failed to flush logs to disk. Read the error log for "
            "more details.\n");
    }
}

struct subcommand syncoptions[] =
{
    {
        "logs",
        0,
        sync_logs,
        "Flush log files to disk",
        "Flush log files to disk",
        {0, 0, 0}
    },
    {
        NULL,
        0,
        NULL,
        NULL,
        NULL,
        {0, 0, 0}
    }
};

static void restart_service(DCB *dcb, SERVICE *service);
static void restart_monitor(DCB *dcb, MONITOR *monitor);
/**
 * The subcommands of the restart command
 */
struct subcommand restartoptions[] = {
    { "monitor", 1, restart_monitor,
      "Restart a monitor, e.g. restart monitor 0x48181e0",
      "Restart a monitor, e.g. restart monitor 0x48181e0",
      {ARG_TYPE_MONITOR, 0, 0} },
    { "service", 1, restart_service,
      "Restart a service, e.g. restart service \"Test Service\"",
      "Restart a service, e.g. restart service 0x4838320",
      {ARG_TYPE_SERVICE, 0, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

static void set_server(DCB *dcb, SERVER *server, char *bit);
static void set_pollsleep(DCB *dcb, int);
static void set_nbpoll(DCB *dcb, int);
static void set_log_throttling(DCB *dcb, int count, int window_ms, int suppress_ms);
/**
 * The subcommands of the set command
 */
struct subcommand setoptions[] = {
    { "server", 2, set_server,
      "Set the status of a server. E.g. set server dbnode4 master",
      "Set the status of a server. E.g. set server 0x4838320 master",
      {ARG_TYPE_SERVER, ARG_TYPE_STRING, 0} },
    { "pollsleep", 1, set_pollsleep,
      "Set the maximum poll sleep period in milliseconds",
      "Set the maximum poll sleep period in milliseconds",
      {ARG_TYPE_NUMERIC, 0, 0} },
    { "nbpolls", 1, set_nbpoll,
      "Set the number of non-blocking polls",
      "Set the number of non-blocking polls",
      {ARG_TYPE_NUMERIC, 0, 0} },
    { "log_throttling", 3, set_log_throttling,
      "Set the log throttling configuration",
      "Set the log throttling configuration",
      {ARG_TYPE_NUMERIC, ARG_TYPE_NUMERIC, ARG_TYPE_NUMERIC} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

static void clear_server(DCB *dcb, SERVER *server, char *bit);
/**
 * The subcommands of the clear command
 */
struct subcommand clearoptions[] = {
    { "server", 2, clear_server,
      "Clear the status of a server. E.g. clear server dbnode2 master",
      "Clear the status of a server. E.g. clear server 0x4838320 master",
      {ARG_TYPE_SERVER, ARG_TYPE_STRING, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

static void reload_dbusers(DCB *dcb, SERVICE *service);
static void reload_config(DCB *dcb);

/**
 * The subcommands of the reload command
 */
struct subcommand reloadoptions[] = {
    { "config", 0, reload_config,
      "Reload the configuration data for MaxScale.",
      "Reload the configuration data for MaxScale.",
      {0, 0, 0} },
    { "dbusers", 1, reload_dbusers,
      "Reload the dbuser data for a service. E.g. reload dbusers \"splitter service\"",
      "Reload the dbuser data for a service. E.g. reload dbusers 0x849420",
      {ARG_TYPE_SERVICE, 0, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};

static void enable_log_action(DCB *, char *);
static void disable_log_action(DCB *, char *);
static void enable_log_priority(DCB *, char *);
static void disable_log_priority(DCB *, char *);
static void enable_sess_log_action(DCB *dcb, char *arg1, char *arg2);
static void disable_sess_log_action(DCB *dcb, char *arg1, char *arg2);
static void enable_sess_log_priority(DCB *dcb, char *arg1, char *arg2);
static void disable_sess_log_priority(DCB *dcb, char *arg1, char *arg2);
static void enable_monitor_replication_heartbeat(DCB *dcb, MONITOR *monitor);
static void disable_monitor_replication_heartbeat(DCB *dcb, MONITOR *monitor);
static void enable_service_root(DCB *dcb, SERVICE *service);
static void disable_service_root(DCB *dcb, SERVICE *service);
static void enable_feedback_action();
static void disable_feedback_action();
static void enable_syslog();
static void disable_syslog();
static void enable_maxlog();
static void disable_maxlog();

/**
 *  * The subcommands of the enable command
 *   */
struct subcommand enableoptions[] = {
    {
        "heartbeat",
        1,
        enable_monitor_replication_heartbeat,
        "Enable the monitor replication heartbeat, pass a monitor name as argument",
        "Enable the monitor replication heartbeat, pass a monitor name as argument",
        {ARG_TYPE_MONITOR, 0, 0}
    },
    {
        "log",
        1,
        enable_log_action,
        "[deprecated] Enable Log options for MaxScale, options 'trace' | 'error' | 'message'."
        "E.g. 'enable log message'.",
        "[deprecated] Enable Log options for MaxScale, options 'trace' | 'error' | 'message'."
        "E.g. 'enable log message'.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "log-priority",
        1,
        enable_log_priority,
        "Enable a logging priority; options 'err' | 'warning' | 'notice' | 'info' | 'debug'. "
        "E.g.: 'enable log-priority info'.",
        "Enable a logging priority; options 'err' | 'warning' | 'notice' | 'info' | 'debug'. "
        "E.g.: 'enable log-priority info'.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "sessionlog",
        2,
        enable_sess_log_action,
        "[deprecated] Enable Log options for a single session. Usage: enable sessionlog [trace | error | "
        "message | debug] <session id>\t E.g. enable sessionlog message 123.",
        "[deprecated] Enable Log options for a single session. Usage: enable sessionlog [trace | error | "
        "message | debug] <session id>\t E.g. enable sessionlog message 123.",
        {ARG_TYPE_STRING, ARG_TYPE_STRING, 0}
    },
    {
        "sessionlog-priority",
        2,
        enable_sess_log_priority,
        "Enable a logging priority for a particular session. "
        "Usage: enable sessionlog-priority [err | warning | notice | info | debug] <session id>"
        "message | debug] <session id>\t E.g. enable sessionlog-priority info 123.",
        "Enable a logging priority for a particular session. "
        "Usage: enable sessionlog-priority [err | warning | notice | info | debug] <session id>"
        "message | debug] <session id>\t E.g. enable sessionlog-priority info 123.",
        {ARG_TYPE_STRING, ARG_TYPE_STRING, 0}
    },
    {
        "root",
        1,
        enable_service_root,
        "Enable root access to a service, pass a service name to enable root access",
        "Enable root access to a service, pass a service name to enable root access",
        {ARG_TYPE_SERVICE, 0, 0}
    },
    {
        "feedback",
        0,
        enable_feedback_action,
        "Enable MaxScale modules list sending via http to notification service",
        "Enable MaxScale modules list sending via http to notification service",
        {0, 0, 0}
    },
    {
        "syslog",
        0,
        enable_syslog,
        "Enable syslog logging",
        "Enable syslog logging",
        {0, 0, 0}
    },
    {
        "maxlog",
        0,
        enable_maxlog,
        "Enable maxlog logging",
        "Enable maxlog logging",
        {0, 0, 0}
    },
    {
        NULL,
        0,
        NULL,
        NULL,
        NULL,
        {0, 0, 0}
    }
};



/**
 *  * The subcommands of the disable command
 *   */
struct subcommand disableoptions[] = {
    {
        "heartbeat",
        1,
        disable_monitor_replication_heartbeat,
        "Disable the monitor replication heartbeat",
        "Disable the monitor replication heartbeat",
        {ARG_TYPE_MONITOR, 0, 0}
    },
    {
        "log",
        1,
        disable_log_action,
        "[deprecated] Disable Log for MaxScale, Options: 'debug' | 'trace' | 'error' | 'message'."
        "E.g. 'disable log debug'.",
        "[deprecated] Disable Log for MaxScale, Options: 'debug' | 'trace' | 'error' | 'message'."
        "E.g. 'disable log debug'.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "log-priority",
        1,
        disable_log_priority,
        "Disable a logging priority; options 'err' | 'warning' | 'notice' | 'info' | 'debug'. "
        "E.g.: 'disable log-priority info'.",
        "Disable a logging priority; options 'err' | 'warning' | 'notice' | 'info' | 'debug'. "
        "E.g.: 'disable log-priority info'.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "sessionlog",
        2,
        disable_sess_log_action,
        "[deprecated] Disable Log options for a single session. Usage: disable sessionlog [trace | error | "
        "message | debug] <session id>\t E.g. disable sessionlog message 123.",
        "[deprecated] Disable Log options for a single session. Usage: disable sessionlog [trace | error | "
        "message | debug] <session id>\t E.g. disable sessionlog message 123.",
        {ARG_TYPE_STRING, ARG_TYPE_STRING, 0}
    },
    {
        "sessionlog-priority",
        2,
        disable_sess_log_priority,
        "Disable a logging priority for a particular session. "
        "Usage: disable sessionlog-priority [err | warning | notice | info | debug] <session id>"
        "message | debug] <session id>\t E.g. enable sessionlog-priority info 123.",
        "Enable a logging priority for a particular session. "
        "Usage: disable sessionlog-priority [err | warning | notice | info | debug] <session id>"
        "message | debug] <session id>\t E.g. enable sessionlog-priority info 123.",
        {ARG_TYPE_STRING, ARG_TYPE_STRING, 0}
    },
    {
        "root",
        1,
        disable_service_root,
        "Disable root access to a service",
        "Disable root access to a service",
        {ARG_TYPE_SERVICE, 0, 0}
    },
    {
        "feedback",
        0,
        disable_feedback_action,
        "Disable MaxScale modules list sending via http to notification service",
        "Disable MaxScale modules list sending via http to notification service",
        {0, 0, 0}
    },
    {
        "syslog",
        0,
        disable_syslog,
        "Disable syslog logging",
        "Disable syslog logging",
        {0, 0, 0}
    },
    {
        "maxlog",
        0,
        disable_maxlog,
        "Disable maxlog logging",
        "Disable maxlog logging",
        {0, 0, 0}
    },
    {
        NULL,
        0,
        NULL,
        NULL,
        NULL,
        {0, 0, 0}
    }
};

#if defined(FAKE_CODE)

static void fail_backendfd(void);
static void fail_clientfd(void);
static void fail_accept(DCB* dcb, char* arg1, char* arg2);
/**
 *  * The subcommands of the fail command
 *   */
struct subcommand failoptions[] = {
    {
        "backendfd",
        0,
        fail_backendfd,
        "Fail backend socket for next operation.",
        "Fail backend socket for next operation.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "clientfd",
        0,
        fail_clientfd,
        "Fail client socket for next operation.",
        "Fail client socket for next operation.",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "accept",
        2,
        fail_accept,
        "Fail to accept next client connection.",
        "Fail to accept next client connection.",
        {ARG_TYPE_STRING, ARG_TYPE_STRING, 0}
    },
    {
        NULL,
        0,
        NULL,
        NULL,
        NULL,
        {0, 0, 0}
    }
};
#endif /* FAKE_CODE */

static void telnetdAddUser(DCB *, char *);
/**
 * The subcommands of the add command
 */
struct subcommand addoptions[] = {
    { "user", 1, telnetdAddUser,
      "Add a new user for the debug interface. E.g. add user john",
      "Add a new user for the debug interface. E.g. add user john",
      {ARG_TYPE_STRING, 0, 0} },
    { NULL, 0, NULL, NULL, NULL,
      {0, 0, 0} }
};


static void telnetdRemoveUser(DCB *, char *);
/**
 * The subcommands of the remove command
 */
struct subcommand removeoptions[] = {
    {
        "user",
        1,
        telnetdRemoveUser,
        "Remove existing maxscale user. Example : remove user john",
        "Remove existing maxscale user. Example : remove user john",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        NULL, 0, NULL, NULL, NULL, {0, 0, 0}
    }
};

/**
 * User command to flush a single logfile
 *
 * @param pdcb          The stream to write output to
 * @param logname       The name of the log
 */
static void
flushlog(DCB *pdcb, char *logname)
{
    bool unrecognized = false;
    bool deprecated = false;

    if (!strcasecmp(logname, "error"))
    {
        deprecated = true;
    }
    else if (!strcasecmp(logname, "message"))
    {
        deprecated = true;
    }
    else if (!strcasecmp(logname, "trace"))
    {
        deprecated = true;
    }
    else if (!strcasecmp(logname, "debug"))
    {
        deprecated = true;
    }
    else if (!strcasecmp(logname, "maxscale"))
    {
        ; // nop
    }
    else
    {
        unrecognized = true;
    }

    if (unrecognized)
    {
        dcb_printf(pdcb, "Unexpected logfile name '%s', expected: 'maxscale'.\n", logname);
    }
    else
    {
        mxs_log_rotate();

        if (deprecated)
        {
            dcb_printf(pdcb,
                       "'%s' is deprecated, currently there is only one log 'maxscale', "
                       "which was rotated.\n", logname);
        }
    }
}

/**
 * User command to flush all logfiles
 *
 * @param pdcb          The stream to write output to
 */
static void
flushlogs(DCB *pdcb)
{
    mxs_log_rotate();
}


/**
 * The subcommands of the flush command
 */
struct subcommand flushoptions[] = {
    {
        "log",
        1,
        flushlog,
        "Flush the content of a log file, close that log, rename it and open a new log file",
        "Flush the content of a log file, close that log, rename it and open a new log file",
        {ARG_TYPE_STRING, 0, 0}
    },
    {
        "logs",
        0,
        flushlogs,
        "Flush the content of all log files, close those logs, rename them and open a new log files",
        "Flush the content of all log files, close those logs, rename them and open a new log files",
        {0, 0, 0}
    },
    {
        NULL, 0, NULL, NULL, NULL, {0, 0, 0}
    }
};


/**
 * The debug command table
 */
static struct {
    char               *cmd;
    struct  subcommand *options;
} cmds[] = {
    { "add",        addoptions },
    { "clear",      clearoptions },
    { "disable",    disableoptions },
    { "enable",     enableoptions },
#if defined(FAKE_CODE)
    { "fail",       failoptions },
#endif /* FAKE_CODE */
    { "flush",      flushoptions },
    { "list",       listoptions },
    { "reload",     reloadoptions },
    { "remove",     removeoptions },
    { "restart",    restartoptions },
    { "set",        setoptions },
    { "show",       showoptions },
    { "shutdown",   shutdownoptions },
    { "sync",   syncoptions },
    { NULL,         NULL    }
};


/**
 * Convert a string argument to a numeric, observing prefixes
 * for number bases, e.g. 0x for hex, 0 for octal
 *
 * @param mode          The CLI mode
 * @param arg           The string representation of the argument
 * @param arg_type      The target type for the argument
 * @return The argument as a long integer
 */
static unsigned long
convert_arg(int mode, char *arg, int arg_type)
{
    unsigned long  rval;
    SERVICE       *service;

    switch (arg_type)
    {
    case ARG_TYPE_ADDRESS:
        return (unsigned long)strtol(arg, NULL, 0);
    case ARG_TYPE_STRING:
        return (unsigned long)arg;
    case ARG_TYPE_SERVICE:
        if (mode == CLIM_USER || (rval = (unsigned long)strtol(arg, NULL, 0)) == 0)
        {
            rval = (unsigned long)service_find(arg);
        }
        return rval;
    case ARG_TYPE_SERVER:
        if (mode == CLIM_USER || (rval = (unsigned long)strtol(arg, NULL, 0)) == 0)
        {
            rval = (unsigned long)server_find_by_unique_name(arg);
        }
        return rval;
    case ARG_TYPE_DBUSERS:
        if (mode == CLIM_USER || (rval = (unsigned long)strtol(arg, NULL, 0)) == 0)
        {
            service = service_find(arg);
            if (service)
            {
                return (unsigned long)(service->ports->users);
            }
            else
            {
                return 0;
            }
        }
        return rval;
    case ARG_TYPE_DCB:
        rval = (unsigned long)strtol(arg, NULL, 0);
        if (mode == CLIM_USER && dcb_isvalid((DCB *)rval) == 0)
        {
            rval = 0;
        }
        return rval;
    case ARG_TYPE_SESSION:
        rval = (unsigned long)strtol(arg, NULL, 0);
        if (mode == CLIM_USER && session_isvalid((SESSION *)rval) == 0)
        {
            rval = 0;
        }
        return rval;
    case ARG_TYPE_MONITOR:
        if (mode == CLIM_USER || (rval = (unsigned long)strtol(arg, NULL, 0)) == 0)
        {
            rval = (unsigned long)monitor_find(arg);
        }
        return rval;
    case ARG_TYPE_FILTER:
        if (mode == CLIM_USER || (rval = (unsigned long)strtol(arg, NULL, 0)) == 0)
        {
            rval = (unsigned long)filter_find(arg);
        }
        return rval;
    case ARG_TYPE_NUMERIC:
        {
            int i;
            for (i = 0; arg[i]; i++)
            {
                if (arg[i] < '0' || arg[i] > '9')
                {
                    return 0;
                }
            }
            return atoi(arg);
        }
    }
    return 0;
}

/**
 * We have a complete line from the user, lookup the commands and execute them
 *
 * Commands are tokenised based on white space and then the first
 * word is checked againts the cmds table. If a match is found the
 * second word is compared to the different options for that command.
 *
 * Commands may also take up to 3 additional arguments, these are all
 * assumed to the numeric values and will be converted before being passed
 * to the handler function for the command.
 *
 * @param cli           The CLI_SESSION
 * @return      Returns 0 if the interpreter should exit
 */
int
execute_cmd(CLI_SESSION *cli)
{
    DCB           *dcb = cli->session->client_dcb;
    int            argc, i, j, found = 0;
    char          *args[MAXARGS + 1];
    unsigned long  arg1, arg2, arg3;
    int            in_quotes = 0, escape_next = 0;
    char          *ptr, *lptr;
    bool           in_space = false;
    int            nskip = 0;

    args[0] = cli->cmdbuf;
    ptr = args[0];
    lptr = ptr;
    i = 0;
    /*
     * Break the command line into a number of words. Whitespace is used
     * to delimit words and may be escaped by use of the \ character or
     * the use of double quotes.
     * The array args contains the broken down words, one per index.
     */

    while (*ptr)
    {
        if (escape_next)
        {
            *lptr++ = *ptr++;
            escape_next = 0;
        }
        else if (*ptr == '\\')
        {
            escape_next = 1;
            ptr++;
        }
        else if (in_quotes == 0 && ((in_space = *ptr == ' ') || *ptr == '\t' || *ptr == '\r' || *ptr == '\n'))
        {

            *lptr = 0;
            lptr += nskip;
            nskip = 0;

            if (!in_space)
            {
                break;
            }

            if (args[i] == ptr)
            {
                args[i] = ptr + 1;
            }
            else
            {
                i++;
                if (i >= MAXARGS - 1)
                {
                    break;
                }
                args[i] = ptr + 1;
            }
            ptr++;
            lptr++;
        }
        else if (*ptr == '\"' && in_quotes == 0)
        {
            in_quotes = 1;
            ptr++;
            nskip++;
        }
        else if (*ptr == '\"' && in_quotes == 1)
        {
            in_quotes = 0;
            ptr++;
            nskip++;
        }
        else
        {
            *lptr++ = *ptr++;
        }
    }
    *lptr = 0;
    args[MIN(MAXARGS - 1, i + 1)] = NULL;

    if (args[0] == NULL || *args[0] == 0)
    {
        return 1;
    }
    for (i = 0; args[i] && *args[i]; i++)
        ;
    argc = i - 2;   /* The number of extra arguments to commands */

    if (!strcasecmp(args[0], "help"))
    {
        if (args[1] == NULL || *args[1] == 0)
        {
            found = 1;
            dcb_printf(dcb, "Available commands:\n");
            for (i = 0; cmds[i].cmd; i++)
            {
                if (cmds[i].options[1].arg1 == NULL)
                {
                    dcb_printf(dcb, "    %s %s\n", cmds[i].cmd, cmds[i].options[0].arg1);
                }
                else
                {
                    dcb_printf(dcb, "    %s [", cmds[i].cmd);
                    for (j = 0; cmds[i].options[j].arg1; j++)
                    {
                        dcb_printf(dcb, "%s%s", cmds[i].options[j].arg1,
                                   cmds[i].options[j + 1].arg1 ? "|" : "");
                    }
                    dcb_printf(dcb, "]\n");
                }
            }
            dcb_printf(dcb, "\nType help command to see details of each command.\n");
            dcb_printf(dcb, "Where commands require names as arguments and these names contain\n");
            dcb_printf(dcb, "whitespace either the \\ character may be used to escape the whitespace\n");
            dcb_printf(dcb, "or the name may be enclosed in double quotes \".\n\n");
        }
        else
        {
            for (i = 0; cmds[i].cmd; i++)
            {
                if (!strcasecmp(args[1], cmds[i].cmd))
                {
                    found = 1;
                    dcb_printf(dcb, "Available options to the %s command:\n", args[1]);
                    for (j = 0; cmds[i].options[j].arg1; j++)
                    {
                        dcb_printf(dcb, "    %-12s %s\n", cmds[i].options[j].arg1,
                                   cmds[i].options[j].help);
                    }
                }
            }
            if (found == 0)
            {
                dcb_printf(dcb, "No command %s to offer help with\n", args[1]);
            }
        }
        found = 1;
    }
    else if (!strcasecmp(args[0], "quit"))
    {
        return 0;
    }
    else if (argc >= 0)
    {
        for (i = 0; cmds[i].cmd; i++)
        {
            if (strcasecmp(args[0], cmds[i].cmd) == 0)
            {
                for (j = 0; cmds[i].options[j].arg1; j++)
                {
                    if (strcasecmp(args[1], cmds[i].options[j].arg1) == 0)
                    {
                        found = 1; /**< command and sub-command match */
                        if (argc != cmds[i].options[j].n_args)
                        {
                            dcb_printf(dcb, "Incorrect number of arguments: %s %s expects %d arguments\n",
                                       cmds[i].cmd, cmds[i].options[j].arg1,
                                       cmds[i].options[j].n_args);
                        }
                        else
                        {
                            switch (cmds[i].options[j].n_args)
                            {
                            case 0:
                                cmds[i].options[j].fn(dcb);
                                break;
                            case 1:
                                arg1 = convert_arg(cli->mode, args[2], cmds[i].options[j].arg_types[0]);

                                if (arg1)
                                {
                                    cmds[i].options[j].fn(dcb, arg1);
                                }
                                else
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[2]);
                                }
                                break;
                            case 2:
                                arg1 = convert_arg(cli->mode, args[2], cmds[i].options[j].arg_types[0]);
                                arg2 = convert_arg(cli->mode, args[3], cmds[i].options[j].arg_types[1]);
                                if (arg1 && arg2)
                                {
                                    cmds[i].options[j].fn(dcb, arg1, arg2);
                                }
                                else if (arg1 == 0)
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[2]);
                                }
                                else
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[3]);
                                }
                                break;
                            case 3:
                                arg1 = convert_arg(cli->mode, args[2], cmds[i].options[j].arg_types[0]);
                                arg2 = convert_arg(cli->mode, args[3], cmds[i].options[j].arg_types[1]);
                                arg3 = convert_arg(cli->mode, args[4], cmds[i].options[j].arg_types[2]);
                                if (arg1 && arg2 && arg3)
                                {
                                    cmds[i].options[j].fn(dcb, arg1, arg2, arg3);
                                }
                                else if (arg1 == 0)
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[2]);
                                }
                                else if (arg2 == 0)
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[3]);
                                }
                                else if (arg3 == 0)
                                {
                                    dcb_printf(dcb, "Invalid argument: %s\n",
                                               args[4]);
                                }
                            }
                        }
                    }
                }
                if (!found)
                {
                    dcb_printf(dcb,
                               "Unknown or missing option for the %s command. Valid sub-commands are:\n",
                               cmds[i].cmd);
                    for (j = 0; cmds[i].options[j].arg1; j++)
                    {
                        dcb_printf(dcb, "    %-10s %s\n", cmds[i].options[j].arg1,
                                   cmds[i].options[j].help);
                    }
                    found = 1;
                }
            }
        }
    }
    else if (argc == -1)
    {
        dcb_printf(dcb,
                   "Commands must consist of at least two words. Type help for a list of commands\n");
        found = 1;
    }
    if (!found)
    {
        dcb_printf(dcb,
                   "Command '%s' not known, type help for a list of available commands\n", args[0]);
    }

    memset(cli->cmdbuf, 0, CMDBUFLEN);

    return 1;
}

/**
 * Debug command to stop a service
 *
 * @param dcb           The DCB to print any output to
 * @param service       The service to shutdown
 */
static void
shutdown_service(DCB *dcb, SERVICE *service)
{
    serviceStop(service);
}

/**
 * Debug command to restart a stopped service
 *
 * @param dcb           The DCB to print any output to
 * @param service       The service to restart
 */
static void
restart_service(DCB *dcb, SERVICE *service)
{
    serviceRestart(service);
}

/**
 * Set the status bit of a server
 *
 * @param dcb           DCB to send output to
 * @param server        The server to set the status of
 * @param bit           String representation of the status bit
 */
static void
set_server(DCB *dcb, SERVER *server, char *bit)
{
    unsigned int bitvalue;

    if ((bitvalue = server_map_status(bit)) != 0)
    {
        server_set_status(server, bitvalue);
    }
    else
    {
        dcb_printf(dcb, "Unknown status bit %s\n", bit);
    }
}


/**
 * Clear the status bit of a server
 *
 * @param dcb           DCB to send output to
 * @param server        The server to set the status of
 * @param bit           String representation of the status bit
 */
static void
clear_server(DCB *dcb, SERVER *server, char *bit)
{
    unsigned int bitvalue;

    if ((bitvalue = server_map_status(bit)) != 0)
    {
        server_clear_status(server, bitvalue);
    }
    else
    {
        dcb_printf(dcb, "Unknown status bit %s\n", bit);
    }
}

/**
 * Reload the authenticaton data from the backend database of a service.
 *
 * @param dcb           DCB to send output
 * @param service       The service to update
 */
static void
reload_dbusers(DCB *dcb, SERVICE *service)
{
    dcb_printf(dcb, "Loaded %d database users for service %s.\n",
               reload_mysql_users(service->ports), service->name);
}

/**
 * Relaod the configuration data from the config file
 *
 * @param dcb           DCB to use to send output
 */
static void
reload_config(DCB *dcb)
{
    dcb_printf(dcb, "Reloading configuration from file.\n");
    config_reload();
}

/**
 * Add a new maxscale admin user
 *
 * @param dcb           The DCB for messages
 * @param user          The user name
 */
static void
telnetdAddUser(DCB *dcb, char *user)
{
    char    *err;

    if (admin_search_user(user))
    {
        dcb_printf(dcb, "User %s already exists.\n", user);
        return;
    }

    if ((err = admin_add_user(user)) == NULL)
    {
        dcb_printf(dcb, "User %s has been successfully added.\n", user);
    }
    else
    {
        dcb_printf(dcb, "Failed to add new user. %s\n", err);
    }
}


/**
 * Remove a maxscale admin user
 *
 * @param dcb           The DCB for messages
 * @param user          The user name
 */
static void telnetdRemoveUser(
    DCB*  dcb,
    char* user)
{
    char* err;

    if (!admin_search_user(user))
    {
        dcb_printf(dcb, "User %s doesn't exist.\n", user);
        return;
    }

    if ((err = admin_remove_user(user)) == NULL)
    {
        dcb_printf(dcb, "User %s has been successfully removed.\n", user);
    }
    else
    {
        dcb_printf(dcb, "Failed to remove user %s. %s\n", user, err);
    }
}



/**
 * Print the adminsitration users
 *
 * @param dcb   The DCB to print the user data to
 */
static void
telnetdShowUsers(DCB *dcb)
{
    dcb_printf(dcb, "Administration interface users:\n");
    dcb_PrintAdminUsers(dcb);
}

/**
 * Print the log throttling state
 *
 * @param dcb The DCB to print the state to.
 */
static void
show_log_throttling(DCB *dcb)
{
    MXS_LOG_THROTTLING t;
    mxs_log_get_throttling(&t);

    dcb_printf(dcb, "%lu %lu %lu\n", t.count, t.window_ms, t.suppress_ms);
}

/**
 * Command to shutdown a running monitor
 *
 * @param dcb   The DCB to use to print messages
 * @param monitor       The monitor to shutdown
 */
static void
shutdown_monitor(DCB *dcb, MONITOR *monitor)
{
    monitorStop(monitor);
}

/**
 * Command to restart a stopped monitor
 *
 * @param dcb   The DCB to use to print messages
 * @param monitor       The monitor to restart
 */
static void
restart_monitor(DCB *dcb, MONITOR *monitor)
{
    monitorStart(monitor, NULL);
}

/**
 * Enable replication heartbeat for a monitor
 *
 * @param dcb           Connection to user interface
 * @param monitor       The monitor
 */
static void
enable_monitor_replication_heartbeat(DCB *dcb, MONITOR *monitor)
{
    CONFIG_PARAMETER param;
    const char* name = "detect_replication_lag";
    const char* value = "1";
    param.name = (char*)name;
    param.value = (char*)value;
    param.next = NULL;
    monitorStop(monitor);
    monitorStart(monitor, &param);
}

/**
 * Disable replication heartbeat for a monitor
 *
 * @param dcb           Connection to user interface
 * @param monitor       The monitor
 */
static void
disable_monitor_replication_heartbeat(DCB *dcb, MONITOR *monitor)
{
    CONFIG_PARAMETER param;
    const char* name = "detect_replication_lag";
    const char* value = "0";
    param.name = (char*)name;
    param.value = (char*)value;
    param.next = NULL;
    monitorStop(monitor);
    monitorStart(monitor, &param);
}

/**
 * Enable root access to a service
 *
 * @param dcb           Connection to user interface
 * @param service       The service
 */
static void
enable_service_root(DCB *dcb, SERVICE *service)
{
    serviceEnableRootUser(service, 1);
}

/**
 * Disable root access to a service
 *
 * @param dcb           Connection to user interface
 * @param service       The service
 */
static void
disable_service_root(DCB *dcb, SERVICE *service)
{
    serviceEnableRootUser(service, 0);
}

struct log_action_entry
{
    const char* name;
    int priority;
    const char* replacement;
};

static bool get_log_action(const char* name, struct log_action_entry* entryp)
{
    static const struct log_action_entry entries[] =
        {
            { "debug",   LOG_DEBUG,  "debug" },
            { "trace",   LOG_INFO,   "info" },
            { "message", LOG_NOTICE, "notice" },
        };
    const int n_entries = sizeof(entries) / sizeof(entries[0]);

    bool found = false;
    int i = 0;

    while (!found && (i < n_entries))
    {
        if (strcmp(name, entries[i].name) == 0)
        {
            *entryp = entries[i];
            found = true;
        }

        ++i;
    }

    return found;
}

/**
 * Enables a log for a single session
 * @param session The session in question
 * @param dcb Client DCB
 * @param type Which log to enable
 */
static void enable_sess_log_action(DCB *dcb, char *arg1, char *arg2)
{
    struct log_action_entry entry;

    if (get_log_action(arg1, &entry))
    {
        size_t id = (size_t) strtol(arg2, 0, 0);
        list_entry_t *current = list_start_iteration(&SESSIONlist);
        while (current)
        {
            SESSION *session = (SESSION *)current;
            if (session->ses_id == id)
            {
                session_enable_log_priority(session, entry.priority);
                list_terminate_iteration_early(&SESSIONlist, current);
                break;
            }
            current = list_iterate(&SESSIONlist, current);
        }

        if (!current)
        {
            dcb_printf(dcb, "Session not found: %s.\n", arg2);
        }
    }
    else
    {
        dcb_printf(dcb, "%s is not supported for enable log.\n", arg1);
    }
}

/**
 * Disables a log for a single session
 * @param session The session in question
 * @param dcb Client DCB
 * @param type Which log to disable
 */
static void disable_sess_log_action(DCB *dcb, char *arg1, char *arg2)
{
    struct log_action_entry entry;

    if (get_log_action(arg1, &entry))
    {
        size_t id = (size_t) strtol(arg2, 0, 0);
        list_entry_t *current = list_start_iteration(&SESSIONlist);
        while (current)
        {
            SESSION *session = (SESSION *)current;
            if (session->ses_id == id)
            {
                session_disable_log_priority(session, entry.priority);
                list_terminate_iteration_early(&SESSIONlist, current);
                break;
            }
            current = list_iterate(&SESSIONlist, current);
        }

        if (!current)
        {
            dcb_printf(dcb, "Session not found: %s.\n", arg2);
        }
    }
    else
    {
        dcb_printf(dcb, "%s is not supported for disable log.\n", arg1);
    }
}

struct log_priority_entry
{
    const char* name;
    int priority;
};

static int compare_log_priority_entries(const void* l, const void* r)
{
    const struct log_priority_entry* l_entry = (const struct log_priority_entry*) l;
    const struct log_priority_entry* r_entry = (const struct log_priority_entry*) r;

    return strcmp(l_entry->name, r_entry->name);
}

static int string_to_priority(const char* name)
{
    static const struct log_priority_entry LOG_PRIORITY_ENTRIES[] =
        {
            // NOTE: If you make changes to this array, ensure that it remains alphabetically ordered.
            { "debug",   LOG_DEBUG },
            { "info",    LOG_INFO },
            { "notice",  LOG_NOTICE },
            { "warning", LOG_WARNING },
        };

    const size_t N_LOG_PRIORITY_ENTRIES = sizeof(LOG_PRIORITY_ENTRIES) / sizeof(LOG_PRIORITY_ENTRIES[0]);

    struct log_priority_entry key = { name, -1 };
    struct log_priority_entry* result = bsearch(&key,
                                                LOG_PRIORITY_ENTRIES,
                                                N_LOG_PRIORITY_ENTRIES,
                                                sizeof(struct log_priority_entry),
                                                compare_log_priority_entries);

    return result ? result->priority : -1;
}

/**
 * Enables a log priority for a single session
 * @param session The session in question
 * @param dcb Client DCB
 * @param type Which log to enable
 */
static void enable_sess_log_priority(DCB *dcb, char *arg1, char *arg2)
{
    int priority = string_to_priority(arg1);

    if (priority != -1)
    {
        size_t id = (size_t) strtol(arg2, 0, 0);
        list_entry_t *current = list_start_iteration(&SESSIONlist);
        while (current)
        {
            SESSION *session = (SESSION *)current;
            if (session->ses_id == id)
            {
                session_enable_log_priority(session, priority);
                list_terminate_iteration_early(&SESSIONlist, current);
                break;
            }
            current = list_iterate(&SESSIONlist, current);
        }

        if (!current)
        {
            dcb_printf(dcb, "Session not found: %s.\n", arg2);
        }
    }
    else
    {
        dcb_printf(dcb, "'%s' is not a supported log priority.\n", arg1);
    }
}

/**
 * Disable a log priority for a single session
 * @param session The session in question
 * @param dcb Client DCB
 * @param type Which log to enable
 */
static void disable_sess_log_priority(DCB *dcb, char *arg1, char *arg2)
{
    int priority = string_to_priority(arg1);

    if (priority != -1)
    {
        size_t id = (size_t) strtol(arg2, 0, 0);
        list_entry_t *current = list_start_iteration(&SESSIONlist);
        while (current)
        {
            SESSION *session = (SESSION *)current;
            if (session->ses_id == id)
            {
                session_disable_log_priority(session, priority);
                list_terminate_iteration_early(&SESSIONlist, current);
                break;
            }
            current = list_iterate(&SESSIONlist, current);
        }

        if (!current)
        {
            dcb_printf(dcb, "Session not found: %s.\n", arg2);
        }
    }
    else
    {
        dcb_printf(dcb, "'%s' is not a supported log priority.\n", arg1);
    }
}

/**
 * The log enable action
 */
static void enable_log_action(DCB *dcb, char *arg1)
{
    struct log_action_entry entry;

    if (get_log_action(arg1, &entry))
    {
        mxs_log_set_priority_enabled(entry.priority, true);

        dcb_printf(dcb,
                   "'enable log %s' is accepted but deprecated, use 'enable log-priority %s' instead.\n",
                   arg1, entry.replacement);
    }
    else
    {
        dcb_printf(dcb, "'%s' is not supported for enable log.\n", arg1);
    }
}

/**
 * The log disable action
 */
static void disable_log_action(DCB *dcb, char *arg1)
{
    struct log_action_entry entry;

    if (get_log_action(arg1, &entry))
    {
        mxs_log_set_priority_enabled(entry.priority, false);

        dcb_printf(dcb,
                   "'disable log %s' is accepted but deprecated, use 'enable log-priority %s' instead.\n",
                   arg1, entry.replacement);
    }
    else
    {
        dcb_printf(dcb, "'%s' is not supported for 'disable log'.\n", arg1);
    }
}

/**
 * The log-priority enable action
 */

static void enable_log_priority(DCB *dcb, char *arg1)
{
    int priority = string_to_priority(arg1);

    if (priority != -1)
    {
        mxs_log_set_priority_enabled(priority, true);
    }
    else
    {
        dcb_printf(dcb, "'%s' is not a supported log priority.\n", arg1);
    }
}

/**
 * The log-priority disable action
 */

static void disable_log_priority(DCB *dcb, char *arg1)
{
    int priority = string_to_priority(arg1);

    if (priority != -1)
    {
        mxs_log_set_priority_enabled(priority, false);
    }
    else
    {
        dcb_printf(dcb, "'%s' is not a supported log priority.\n", arg1);
    }
}

/**
 * Set the duration of the sleep passed to the poll wait
 *
 * @param       dcb             DCB for output
 * @param       sleeptime       Sleep time in milliseconds
 */
static void
set_pollsleep(DCB *dcb, int sleeptime)
{
    poll_set_maxwait(sleeptime);
}

/**
 * Set the number of non-blockign spins to make
 *
 * @param       dcb             DCB for output
 * @param       nb              Number of spins
 */
static void
set_nbpoll(DCB *dcb, int nb)
{
    poll_set_nonblocking_polls(nb);
}

static void
set_log_throttling(DCB *dcb, int count, int window_ms, int suppress_ms)
{
    if ((count >= 0) || (window_ms >= 0) || (suppress_ms >= 0))
    {
        MXS_LOG_THROTTLING t = { count, window_ms, suppress_ms };

        mxs_log_set_throttling(&t);
    }
    else
    {
        dcb_printf(dcb,
                   "set log_throttling expect 3 integers X Y Z, equal to or larger than 0, "
                   "where the X denotes how many times particular message may be logged "
                   "during a period of Y milliseconds before it is suppressed for Z milliseconds.");
    }
}

/**
 * Re-enable sendig MaxScale module list via http
 * Proper [feedback] section in MaxSclale.cnf
 * is required.
 */
static void
enable_feedback_action(void)
{
    config_enable_feedback_task();
    return;
}

/**
 * Disable sendig MaxScale module list via http
 */

static void
disable_feedback_action(void)
{
    config_disable_feedback_task();
    return;
}

/**
 * Enable syslog logging.
 */
static void
enable_syslog()
{
    mxs_log_set_syslog_enabled(true);
}

/**
 * Disable syslog logging.
 */
static void
disable_syslog()
{
    mxs_log_set_syslog_enabled(false);
}

/**
 * Enable maxlog logging.
 */
static void
enable_maxlog()
{
    mxs_log_set_maxlog_enabled(true);
}

/**
 * Disable maxlog logging.
 */
static void
disable_maxlog()
{
    mxs_log_set_maxlog_enabled(false);
}

#if defined(FAKE_CODE)
static void fail_backendfd(void)
{
    fail_next_backend_fd = true;
}

static void fail_clientfd(void)
{
    fail_next_client_fd = true;
}

static void fail_accept(
    DCB*  dcb,
    char* arg1,
    char* arg2)
{
    int failcount = MIN(atoi(arg2), 100);
    fail_accept_errno = atoi(arg1);
    char errbuf[STRERROR_BUFLEN];

    switch(fail_accept_errno) {
    case EAGAIN:
//    case EWOULDBLOCK:
    case EBADF:
    case EINTR:
    case EINVAL:
    case EMFILE:
    case ENFILE:
    case ENOTSOCK:
    case EOPNOTSUPP:
    case ENOBUFS:
    case ENOMEM:
    case EPROTO:
        fail_next_accept = failcount;
        break;

    default:
        dcb_printf(dcb,
                   "[%d, %s] is not valid errno for accept.\n",
                   fail_accept_errno,
                   strerror_r(fail_accept_errno, errbuf, sizeof(errbuf)));
        return ;
    }
}
#endif /* FAKE_CODE */