host: Major refactor

[xonotic/darkplaces.git] / host.c

/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// host.c -- coordinates spawning and killing of local servers

#include "quakedef.h"

#include <time.h>
#include "libcurl.h"
#include "cdaudio.h"
#include "cl_video.h"
#include "progsvm.h"
#include "csprogs.h"
#include "sv_demo.h"
#include "snd_main.h"
#include "taskqueue.h"
#include "thread.h"
#include "utf8lib.h"

/*

A server can always be started, even if the system started out as a client
to a remote system.

A client can NOT be started if the system started as a dedicated server.

Memory is cleared / released when a server or client begins, not when they end.

*/

host_t host;

// pretend frames take this amount of time (in seconds), 0 = realtime
cvar_t host_framerate = {CVAR_CLIENT | CVAR_SERVER, "host_framerate","0", "locks frame timing to this value in seconds, 0.05 is 20fps for example, note that this can easily run too fast, use cl_maxfps if you want to limit your framerate instead, or sys_ticrate to limit server speed"};
cvar_t cl_maxphysicsframesperserverframe = {CVAR_CLIENT, "cl_maxphysicsframesperserverframe","10", "maximum number of physics frames per server frame"};
// shows time used by certain subsystems
cvar_t host_speeds = {CVAR_CLIENT | CVAR_SERVER, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
cvar_t host_maxwait = {CVAR_CLIENT | CVAR_SERVER, "host_maxwait","1000", "maximum sleep time requested from the operating system in millisecond. Larger sleeps will be done using multiple host_maxwait length sleeps. Lowering this value will increase CPU load, but may help working around problems with accuracy of sleep times."};

cvar_t developer = {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "developer","0", "shows debugging messages and information (recommended for all developers and level designers); the value -1 also suppresses buffering and logging these messages"};
cvar_t developer_extra = {CVAR_CLIENT | CVAR_SERVER, "developer_extra", "0", "prints additional debugging messages, often very verbose!"};
cvar_t developer_insane = {CVAR_CLIENT | CVAR_SERVER, "developer_insane", "0", "prints huge streams of information about internal workings, entire contents of files being read/written, etc.  Not recommended!"};
cvar_t developer_loadfile = {CVAR_CLIENT | CVAR_SERVER, "developer_loadfile","0", "prints name and size of every file loaded via the FS_LoadFile function (which is almost everything)"};
cvar_t developer_loading = {CVAR_CLIENT | CVAR_SERVER, "developer_loading","0", "prints information about files as they are loaded or unloaded successfully"};
cvar_t developer_entityparsing = {CVAR_CLIENT, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};

cvar_t timestamps = {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
cvar_t timeformat = {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};

cvar_t sessionid = {CVAR_CLIENT | CVAR_SERVER | CVAR_READONLY, "sessionid", "", "ID of the current session (use the -sessionid parameter to set it); this is always either empty or begins with a dot (.)"};
cvar_t locksession = {CVAR_CLIENT | CVAR_SERVER, "locksession", "0", "Lock the session? 0 = no, 1 = yes and abort on failure, 2 = yes and continue on failure"};

/*
================
Host_AbortCurrentFrame

aborts the current host frame and goes on with the next one
================
*/
void Host_AbortCurrentFrame(void) DP_FUNC_NORETURN;
void Host_AbortCurrentFrame(void)
{
        // in case we were previously nice, make us mean again
        Sys_MakeProcessMean();

        longjmp (host.abortframe, 1);
}

/*
================
Host_Error

This shuts down both the client and server
================
*/
void Host_Error (const char *error, ...)
{
        static char hosterrorstring1[MAX_INPUTLINE]; // THREAD UNSAFE
        static char hosterrorstring2[MAX_INPUTLINE]; // THREAD UNSAFE
        static qboolean hosterror = false;
        va_list argptr;

        // turn off rcon redirect if it was active when the crash occurred
        // to prevent loops when it is a networking problem
        Con_Rcon_Redirect_Abort();

        va_start (argptr,error);
        dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
        va_end (argptr);

        Con_Printf(CON_ERROR "Host_Error: %s\n", hosterrorstring1);

        // LadyHavoc: if crashing very early, or currently shutting down, do
        // Sys_Error instead
        if (host.framecount < 3 || host.state == host_shutdown)
                Sys_Error ("Host_Error: %s", hosterrorstring1);

        if (hosterror)
                Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
        hosterror = true;

        strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));

        CL_Parse_DumpPacket();

        CL_Parse_ErrorCleanUp();

        //PR_Crash();

        // print out where the crash happened, if it was caused by QC (and do a cleanup)
        PRVM_Crash(SVVM_prog);
        PRVM_Crash(CLVM_prog);
#ifdef CONFIG_MENU
        PRVM_Crash(MVM_prog);
#endif

        cl.csqc_loaded = false;
        Cvar_SetValueQuick(&csqc_progcrc, -1);
        Cvar_SetValueQuick(&csqc_progsize, -1);

        SV_LockThreadMutex();
        SV_Shutdown ();
        SV_UnlockThreadMutex();

        if (cls.state == ca_dedicated)
                Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit

        CL_Disconnect ();
        cls.demonum = -1;

        hosterror = false;

        Host_AbortCurrentFrame();
}

static void Host_ServerOptions (void)
{
        int i;

        // general default
        svs.maxclients = 8;

// COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
// COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
        // if no client is in the executable or -dedicated is specified on
        // commandline, start a dedicated server
        i = COM_CheckParm ("-dedicated");
        if (i || !cl_available)
        {
                cls.state = ca_dedicated;
                // check for -dedicated specifying how many players
                if (i && i + 1 < sys.argc && atoi (sys.argv[i+1]) >= 1)
                        svs.maxclients = atoi (sys.argv[i+1]);
                if (COM_CheckParm ("-listen"))
                        Con_Printf ("Only one of -dedicated or -listen can be specified\n");
                // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
                Cvar_SetValue(&cvars_all, "sv_public", 1);
        }
        else if (cl_available)
        {
                // client exists and not dedicated, check if -listen is specified
                cls.state = ca_disconnected;
                i = COM_CheckParm ("-listen");
                if (i)
                {
                        // default players unless specified
                        if (i + 1 < sys.argc && atoi (sys.argv[i+1]) >= 1)
                                svs.maxclients = atoi (sys.argv[i+1]);
                }
                else
                {
                        // default players in some games, singleplayer in most
                        if (gamemode != GAME_GOODVSBAD2 && !IS_NEXUIZ_DERIVED(gamemode) && gamemode != GAME_BATTLEMECH)
                                svs.maxclients = 1;
                }
        }

        svs.maxclients = svs.maxclients_next = bound(1, svs.maxclients, MAX_SCOREBOARD);

        svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);

        if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
                Cvar_SetValueQuick(&deathmatch, 1);
}

/*
==================
Host_Quit_f
==================
*/
void Host_Quit_f(cmd_state_t *cmd)
{
        if(host.state == host_shutdown)
                Con_Printf("shutting down already!\n");
        else
                host.state = host_shutdown;
}

static void Host_Version_f(cmd_state_t *cmd)
{
        Con_Printf("Version: %s build %s\n", gamename, buildstring);
}

/*
=======================
Host_InitLocal
======================
*/
void Host_SaveConfig_f(cmd_state_t *cmd);
void Host_LoadConfig_f(cmd_state_t *cmd);
extern cvar_t sv_writepicture_quality;
extern cvar_t r_texture_jpeg_fastpicmip;
static void Host_InitLocal (void)
{
        Cmd_AddCommand(CMD_SHARED, "quit", Host_Quit_f, "quit the game");
        Cmd_AddCommand(CMD_SHARED, "version", Host_Version_f, "print engine version");
        Cmd_AddCommand(CMD_SHARED, "saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
        Cmd_AddCommand(CMD_SHARED, "loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
        Cvar_RegisterVariable (&cl_maxphysicsframesperserverframe);
        Cvar_RegisterVariable (&host_framerate);
        Cvar_RegisterVariable (&host_speeds);
        Cvar_RegisterVariable (&host_maxwait);

        Cvar_RegisterVariable (&developer);
        Cvar_RegisterVariable (&developer_extra);
        Cvar_RegisterVariable (&developer_insane);
        Cvar_RegisterVariable (&developer_loadfile);
        Cvar_RegisterVariable (&developer_loading);
        Cvar_RegisterVariable (&developer_entityparsing);

        Cvar_RegisterVariable (&timestamps);
        Cvar_RegisterVariable (&timeformat);

        Cvar_RegisterVariable (&sv_writepicture_quality);
        Cvar_RegisterVariable (&r_texture_jpeg_fastpicmip);
}


/*
===============
Host_SaveConfig_f

Writes key bindings and archived cvars to config.cfg
===============
*/
static void Host_SaveConfig_to(const char *file)
{
        qfile_t *f;

// dedicated servers initialize the host but don't parse and set the
// config.cfg cvars
        // LadyHavoc: don't save a config if it crashed in startup
        if (host.framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
        {
                f = FS_OpenRealFile(file, "wb", false);
                if (!f)
                {
                        Con_Printf(CON_ERROR "Couldn't write %s.\n", file);
                        return;
                }

                Key_WriteBindings (f);
                Cvar_WriteVariables (&cvars_all, f);

                FS_Close (f);
        }
}
void Host_SaveConfig(void)
{
        Host_SaveConfig_to(CONFIGFILENAME);
}
void Host_SaveConfig_f(cmd_state_t *cmd)
{
        const char *file = CONFIGFILENAME;

        if(Cmd_Argc(cmd) >= 2) {
                file = Cmd_Argv(cmd, 1);
                Con_Printf("Saving to %s\n", file);
        }

        Host_SaveConfig_to(file);
}

static void Host_AddConfigText(cmd_state_t *cmd)
{
        // set up the default startmap_sp and startmap_dm aliases (mods can
        // override these) and then execute the quake.rc startup script
        if (gamemode == GAME_NEHAHRA)
                Cbuf_InsertText(cmd, "alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec " STARTCONFIGFILENAME "\n");
        else if (gamemode == GAME_TRANSFUSION)
                Cbuf_InsertText(cmd, "alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec " STARTCONFIGFILENAME "\n");
        else if (gamemode == GAME_TEU)
                Cbuf_InsertText(cmd, "alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
        else
                Cbuf_InsertText(cmd, "alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec " STARTCONFIGFILENAME "\n");
        Cbuf_Execute(cmd);
}

/*
===============
Host_LoadConfig_f

Resets key bindings and cvars to defaults and then reloads scripts
===============
*/
void Host_LoadConfig_f(cmd_state_t *cmd)
{
        // reset all cvars, commands and aliases to init values
        Cmd_RestoreInitState();
#ifdef CONFIG_MENU
        // prepend a menu restart command to execute after the config
        Cbuf_InsertText(&cmd_client, "\nmenu_restart\n");
#endif
        // reset cvars to their defaults, and then exec startup scripts again
        Host_AddConfigText(&cmd_client);
}

//============================================================================

/*
===================
Host_GetConsoleCommands

Add them exactly as if they had been typed at the console
===================
*/
static void Host_GetConsoleCommands (void)
{
        char *line;

        while ((line = Sys_ConsoleInput()))
        {
                if (cls.state == ca_dedicated)
                        Cbuf_AddText(&cmd_server, line);
                else
                        Cbuf_AddText(&cmd_client, line);
        }
}

/*
==================
Host_TimeReport

Returns a time report string, for example for
==================
*/
const char *Host_TimingReport(char *buf, size_t buflen)
{
        return va(buf, buflen, "%.1f%% CPU, %.2f%% lost, offset avg %.1fms, max %.1fms, sdev %.1fms", svs.perf_cpuload * 100, svs.perf_lost * 100, svs.perf_offset_avg * 1000, svs.perf_offset_max * 1000, svs.perf_offset_sdev * 1000);
}

/*
==================
Host_Frame

Runs all active servers
==================
*/
static void Host_Init(void);
double Host_Frame(double time)
{
        double cl_timer = 0;
        double sv_timer = 0;
        static double wait;

        if (host_framerate.value < 0.00001 && host_framerate.value != 0)
                Cvar_SetValueQuick(&host_framerate, 0);

        TaskQueue_Frame(false);

        // keep the random time dependent, but not when playing demos/benchmarking
        if(!*sv_random_seed.string && !cls.demoplayback)
                rand();

        NetConn_UpdateSockets();

        Log_DestBuffer_Flush();

        Curl_Run();

        // check for commands typed to the host
        Host_GetConsoleCommands();

        // process console commands
//              R_TimeReport("preconsole");
        Cbuf_Frame(&cmd_client);
        Cbuf_Frame(&cmd_server);

        if(sv.active)
                Cbuf_Frame(&cmd_serverfromclient);

//              R_TimeReport("console");

        //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);

        R_TimeReport("---");

        sv_timer = SV_Frame(time);
        cl_timer = CL_Frame(time);

        Mem_CheckSentinelsGlobal();

        // if the accumulators haven't become positive yet, wait a while
        if (cls.state == ca_dedicated)
                wait = sv_timer * -1000000.0; // dedicated
        else if (!sv.active || svs.threaded)
                wait = cl_timer * -1000000.0; // connected to server, main menu, or server is on different thread
        else
                wait = max(cl_timer, sv_timer) * -1000000.0; // listen server or singleplayer

        if (!host.restless && wait >= 1)
                return wait;
        else
                return 0;
}

static inline void Host_Sleep(double time)
{
        double time0, delta;

        if(host_maxwait.value <= 0)
                time = min(time, 1000000.0);
        else
                time = min(time, host_maxwait.value * 1000.0);
        if(time < 1)
                time = 1; // because we cast to int

        time0 = Sys_DirtyTime();
        if (sv_checkforpacketsduringsleep.integer && !sys_usenoclockbutbenchmark.integer && !svs.threaded) {
                NetConn_SleepMicroseconds((int)time);
                if (cls.state != ca_dedicated)
                        NetConn_ClientFrame(); // helps server browser get good ping values
                // TODO can we do the same for ServerFrame? Probably not.
        }
        else
                Sys_Sleep((int)time);
        delta = Sys_DirtyTime() - time0;
        if (delta < 0 || delta >= 1800) 
                delta = 0;
        host.sleeptime += delta;
//                      R_TimeReport("sleep");
        return;
}

// Cloudwalk: Most overpowered function declaration...
static inline double Host_UpdateTime (double newtime, double oldtime)
{
        double time = newtime - oldtime;

        if (time < 0)
        {
                // warn if it's significant
                if (time < -0.01)
                        Con_Printf(CON_WARN "Host_GetTime: time stepped backwards (went from %f to %f, difference %f)\n", oldtime, newtime, time);
                time = 0;
        }
        else if (time >= 1800)
        {
                Con_Printf(CON_WARN "Host_GetTime: time stepped forward (went from %f to %f, difference %f)\n", oldtime, newtime, time);
                time = 0;
        }

        return time;
}

void Host_Main(void)
{
        double time, newtime, oldtime, sleeptime;

        Host_Init(); // Start!

        host.realtime = 0;
        oldtime = Sys_DirtyTime();

        while(host.state != host_shutdown)
        {
                if (setjmp(host.abortframe))
                {
                        host.state = host_active; // In case we were loading
                        continue;                       // something bad happened, or the server disconnected
                }

                newtime = host.dirtytime = Sys_DirtyTime();
                host.realtime += time = Host_UpdateTime(newtime, oldtime);

                sleeptime = Host_Frame(time);
                oldtime = newtime;

                if (sleeptime)
                {
                        Host_Sleep(sleeptime);
                        continue;
                }

                host.framecount++;
        }

        Sys_Quit(0);
}

//============================================================================

qboolean vid_opened = false;
void Host_StartVideo(void)
{
        if (!vid_opened && cls.state != ca_dedicated)
        {
                vid_opened = true;
                // make sure we open sockets before opening video because the Windows Firewall "unblock?" dialog can screw up the graphics context on some graphics drivers
                NetConn_UpdateSockets();
                VID_Start();
                CDAudio_Startup();
        }
}

char engineversion[128];

qboolean sys_nostdout = false;

static qfile_t *locksession_fh = NULL;
static qboolean locksession_run = false;
static void Host_InitSession(void)
{
        int i;
        char *buf;
        Cvar_RegisterVariable(&sessionid);
        Cvar_RegisterVariable(&locksession);

        // load the session ID into the read-only cvar
        if ((i = COM_CheckParm("-sessionid")) && (i + 1 < sys.argc))
        {
                if(sys.argv[i+1][0] == '.')
                        Cvar_SetQuick(&sessionid, sys.argv[i+1]);
                else
                {
                        buf = (char *)Z_Malloc(strlen(sys.argv[i+1]) + 2);
                        dpsnprintf(buf, sizeof(buf), ".%s", sys.argv[i+1]);
                        Cvar_SetQuick(&sessionid, buf);
                }
        }
}
void Host_LockSession(void)
{
        if(locksession_run)
                return;
        locksession_run = true;
        if(locksession.integer != 0 && !COM_CheckParm("-readonly"))
        {
                char vabuf[1024];
                char *p = va(vabuf, sizeof(vabuf), "%slock%s", *fs_userdir ? fs_userdir : fs_basedir, sessionid.string);
                FS_CreatePath(p);
                locksession_fh = FS_SysOpen(p, "wl", false);
                // TODO maybe write the pid into the lockfile, while we are at it? may help server management tools
                if(!locksession_fh)
                {
                        if(locksession.integer == 2)
                        {
                                Con_Printf(CON_WARN "WARNING: session lock %s could not be acquired. Please run with -sessionid and an unique session name. Continuing anyway.\n", p);
                        }
                        else
                        {
                                Sys_Error("session lock %s could not be acquired. Please run with -sessionid and an unique session name.\n", p);
                        }
                }
        }
}
void Host_UnlockSession(void)
{
        if(!locksession_run)
                return;
        locksession_run = false;

        if(locksession_fh)
        {
                FS_Close(locksession_fh);
                // NOTE: we can NOT unlink the lock here, as doing so would
                // create a race condition if another process created it
                // between our close and our unlink
                locksession_fh = NULL;
        }
}

/*
====================
Host_Init
====================
*/
static void Host_Init (void)
{
        int i;
        const char* os;
        char vabuf[1024];
        cmd_state_t *cmd = &cmd_client;

        host.state = host_init;

        if (COM_CheckParm("-profilegameonly"))
                Sys_AllowProfiling(false);

        // LadyHavoc: quake never seeded the random number generator before... heh
        if (COM_CheckParm("-benchmark"))
                srand(0); // predictable random sequence for -benchmark
        else
                srand((unsigned int)time(NULL));

        // FIXME: this is evil, but possibly temporary
        // LadyHavoc: doesn't seem very temporary...
        // LadyHavoc: made this a saved cvar
// COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
        if (COM_CheckParm("-developer"))
        {
                developer.value = developer.integer = 1;
                developer.string = "1";
        }

        if (COM_CheckParm("-developer2") || COM_CheckParm("-developer3"))
        {
                developer.value = developer.integer = 1;
                developer.string = "1";
                developer_extra.value = developer_extra.integer = 1;
                developer_extra.string = "1";
                developer_insane.value = developer_insane.integer = 1;
                developer_insane.string = "1";
                developer_memory.value = developer_memory.integer = 1;
                developer_memory.string = "1";
                developer_memorydebug.value = developer_memorydebug.integer = 1;
                developer_memorydebug.string = "1";
        }

        if (COM_CheckParm("-developer3"))
        {
                gl_paranoid.integer = 1;gl_paranoid.string = "1";
                gl_printcheckerror.integer = 1;gl_printcheckerror.string = "1";
        }

// COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
        if (COM_CheckParm("-nostdout"))
                sys_nostdout = 1;

        // used by everything
        Memory_Init();

        // initialize console command/cvar/alias/command execution systems
        Cmd_Init();

        // initialize memory subsystem cvars/commands
        Memory_Init_Commands();

        // initialize console and logging and its cvars/commands
        Con_Init();

        // initialize various cvars that could not be initialized earlier
        u8_Init();
        Curl_Init_Commands();
        Sys_Init_Commands();
        COM_Init_Commands();

        // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
        FS_Init();

        // construct a version string for the corner of the console
        os = DP_OS_NAME;
        dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
        Con_Printf("%s\n", engineversion);

        // initialize process nice level
        Sys_InitProcessNice();

        // initialize ixtable
        Mathlib_Init();

        // register the cvars for session locking
        Host_InitSession();

        // must be after FS_Init
        Crypto_Init();
        Crypto_Init_Commands();

        NetConn_Init();
        Curl_Init();
        PRVM_Init();
        Mod_Init();
        World_Init();
        SV_Init();
        V_Init(); // some cvars needed by server player physics (cl_rollangle etc)
        Host_InitLocal();
        Host_ServerOptions();

        Thread_Init();
        TaskQueue_Init();

        CL_Init();

        // save off current state of aliases, commands and cvars for later restore if FS_GameDir_f is called
        // NOTE: menu commands are freed by Cmd_RestoreInitState
        Cmd_SaveInitState();

        // FIXME: put this into some neat design, but the menu should be allowed to crash
        // without crashing the whole game, so this should just be a short-time solution

        // here comes the not so critical stuff
        if (setjmp(host.abortframe)) {
                return;
        }

        Host_AddConfigText(cmd);

        Host_StartVideo();

        // if quake.rc is missing, use default
        if (!FS_FileExists("quake.rc"))
        {
                Cbuf_InsertText(cmd, "exec default.cfg\nexec " CONFIGFILENAME "\nexec autoexec.cfg\n");
                Cbuf_Execute(cmd);
        }

        host.state = host_active;

        // run stuffcmds now, deferred previously because it can crash if a server starts that early
        Cbuf_AddText(cmd,"stuffcmds\n");
        Cbuf_Execute(cmd);

        Log_Start();

        // put up the loading image so the user doesn't stare at a black screen...
        SCR_BeginLoadingPlaque(true);
        
        // check for special benchmark mode
// COMMANDLINEOPTION: Client: -benchmark <demoname> runs a timedemo and quits, results of any timedemo can be found in gamedir/benchmark.log (for example id1/benchmark.log)
        i = COM_CheckParm("-benchmark");
        if (i && i + 1 < sys.argc)
        if (!sv.active && !cls.demoplayback && !cls.connect_trying)
        {
                Cbuf_AddText(&cmd_client, va(vabuf, sizeof(vabuf), "timedemo %s\n", sys.argv[i + 1]));
                Cbuf_Execute(&cmd_client);
        }

        // check for special demo mode
// COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
        i = COM_CheckParm("-demo");
        if (i && i + 1 < sys.argc)
        if (!sv.active && !cls.demoplayback && !cls.connect_trying)
        {
                Cbuf_AddText(&cmd_client, va(vabuf, sizeof(vabuf), "playdemo %s\n", sys.argv[i + 1]));
                Cbuf_Execute(&cmd_client);
        }

#ifdef CONFIG_VIDEO_CAPTURE
// COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
        i = COM_CheckParm("-capturedemo");
        if (i && i + 1 < sys.argc)
        if (!sv.active && !cls.demoplayback && !cls.connect_trying)
        {
                Cbuf_AddText(&cmd_client, va(vabuf, sizeof(vabuf), "playdemo %s\ncl_capturevideo 1\n", sys.argv[i + 1]));
                Cbuf_Execute(&cmd_client);
        }
#endif

        if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
        if (!sv.active && !cls.demoplayback && !cls.connect_trying)
        {
                Cbuf_AddText(&cmd_client, "startmap_dm\n");
                Cbuf_Execute(&cmd_client);
        }

        if (!sv.active && !cls.demoplayback && !cls.connect_trying)
        {
#ifdef CONFIG_MENU
                Cbuf_AddText(&cmd_client, "togglemenu 1\n");
#endif
                Cbuf_Execute(&cmd_client);
        }

        Con_DPrint("========Initialized=========\n");

        if (cls.state != ca_dedicated)
                SV_StartThread();
}


/*
===============
Host_Shutdown

FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
to run quit through here before the final handoff to the sys code.
===============
*/
void Host_Shutdown(void)
{
        static qboolean isdown = false;

        if (isdown)
        {
                Con_Print("recursive shutdown\n");
                return;
        }
        if (setjmp(host.abortframe))
        {
                Con_Print("aborted the quitting frame?!?\n");
                return;
        }
        isdown = true;

        if(cls.state != ca_dedicated)
                CL_Shutdown();

        // end the server thread
        if (svs.threaded)
                SV_StopThread();

        // shut down local server if active
        SV_LockThreadMutex();
        SV_Shutdown ();
        SV_UnlockThreadMutex();

        // AK shutdown PRVM
        // AK hmm, no PRVM_Shutdown(); yet

        Host_SaveConfig();

        Curl_Shutdown ();
        NetConn_Shutdown ();

        SV_StopThread();
        TaskQueue_Shutdown();
        Thread_Shutdown();
        Cmd_Shutdown();
        Sys_Shutdown();
        Log_Close();
        Crypto_Shutdown();

        Host_UnlockSession();

        Con_Shutdown();
        Memory_Shutdown();
}

void Host_NoOperation_f(cmd_state_t *cmd)
{
}