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barrier/cmd/synergys/synergys.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CClientListener.h"
#include "CClientProxy.h"
#include "CConfig.h"
#include "CPrimaryClient.h"
#include "CServer.h"
#include "CScreen.h"
#include "ProtocolTypes.h"
#include "Version.h"
#include "XScreen.h"
#include "CSocketMultiplexer.h"
#include "CTCPSocketFactory.h"
#include "XSocket.h"
#include "CThread.h"
#include "CEventQueue.h"
#include "CFunctionEventJob.h"
#include "CLog.h"
#include "CString.h"
#include "CStringUtil.h"
#include "LogOutputters.h"
#include "CArch.h"
#include "XArch.h"
#include "stdfstream.h"
#include <cstring>
#define DAEMON_RUNNING(running_)
#if WINAPI_MSWINDOWS
#include "CArchMiscWindows.h"
#include "CMSWindowsScreen.h"
#include "CMSWindowsUtil.h"
#include "CMSWindowsServerTaskBarReceiver.h"
#include "resource.h"
#undef DAEMON_RUNNING
#define DAEMON_RUNNING(running_) CArchMiscWindows::daemonRunning(running_)
#elif WINAPI_XWINDOWS
#include "CXWindowsScreen.h"
#include "CXWindowsServerTaskBarReceiver.h"
#elif WINAPI_CARBON
#include "COSXScreen.h"
#include "COSXServerTaskBarReceiver.h"
#endif
// platform dependent name of a daemon
#if SYSAPI_WIN32
#define DAEMON_NAME "Synergy Server"
#elif SYSAPI_UNIX
#define DAEMON_NAME "synergys"
#endif
// configuration file name
#if SYSAPI_WIN32
#define USR_CONFIG_NAME "synergy.sgc"
#define SYS_CONFIG_NAME "synergy.sgc"
#elif SYSAPI_UNIX
#define USR_CONFIG_NAME ".synergy.conf"
#define SYS_CONFIG_NAME "synergy.conf"
#endif
typedef int (*StartupFunc)(int, char**);
static void parse(int argc, const char* const* argv);
static bool loadConfig(const CString& pathname);
static void loadConfig();
//
// program arguments
//
#define ARG CArgs::s_instance
class CArgs {
public:
CArgs() :
m_pname(NULL),
m_backend(false),
m_restartable(true),
m_daemon(true),
m_configFile(),
m_logFilter(NULL),
m_display(NULL),
m_synergyAddress(NULL),
m_config(NULL)
{ s_instance = this; }
~CArgs() { s_instance = NULL; }
public:
static CArgs* s_instance;
const char* m_pname;
bool m_backend;
bool m_restartable;
bool m_daemon;
CString m_configFile;
const char* m_logFilter;
const char* m_display;
CString m_name;
CNetworkAddress* m_synergyAddress;
CConfig* m_config;
};
CArgs* CArgs::s_instance = NULL;
//
// platform dependent factories
//
static
CScreen*
createScreen()
{
#if WINAPI_MSWINDOWS
return new CScreen(new CMSWindowsScreen(true));
#elif WINAPI_XWINDOWS
return new CScreen(new CXWindowsScreen(ARG->m_display, true));
#elif WINAPI_CARBON
return new CScreen(new COSXScreen(true));
#endif
}
static
CServerTaskBarReceiver*
createTaskBarReceiver(const CBufferedLogOutputter* logBuffer)
{
#if WINAPI_MSWINDOWS
return new CMSWindowsServerTaskBarReceiver(
CMSWindowsScreen::getInstance(), logBuffer);
#elif WINAPI_XWINDOWS
return new CXWindowsServerTaskBarReceiver(logBuffer);
#elif WINAPI_CARBON
return new COSXServerTaskBarReceiver(logBuffer);
#endif
}
//
// platform independent main
//
enum EServerState {
kUninitialized,
kInitializing,
kInitializingToStart,
kInitialized,
kStarting,
kStarted
};
static EServerState s_serverState = kUninitialized;
static CServer* s_server = NULL;
static CScreen* s_serverScreen = NULL;
static CPrimaryClient* s_primaryClient = NULL;
static CClientListener* s_listener = NULL;
static CServerTaskBarReceiver* s_taskBarReceiver = NULL;
static CEvent::Type s_reloadConfigEvent = CEvent::kUnknown;
static CEvent::Type s_forceReconnectEvent = CEvent::kUnknown;
static bool s_suspended = false;
static CEventQueueTimer* s_timer = NULL;
CEvent::Type
getReloadConfigEvent()
{
return CEvent::registerTypeOnce(s_reloadConfigEvent, "reloadConfig");
}
CEvent::Type
getForceReconnectEvent()
{
return CEvent::registerTypeOnce(s_forceReconnectEvent, "forceReconnect");
}
static
void
updateStatus()
{
s_taskBarReceiver->updateStatus(s_server, "");
}
static
void
updateStatus(const CString& msg)
{
s_taskBarReceiver->updateStatus(s_server, msg);
}
static
void
handleClientConnected(const CEvent&, void* vlistener)
{
CClientListener* listener = reinterpret_cast<CClientListener*>(vlistener);
CClientProxy* client = listener->getNextClient();
if (client != NULL) {
s_server->adoptClient(client);
updateStatus();
}
}
static
CClientListener*
openClientListener(const CNetworkAddress& address)
{
CClientListener* listen =
new CClientListener(address, new CTCPSocketFactory, NULL);
EVENTQUEUE->adoptHandler(CClientListener::getConnectedEvent(), listen,
new CFunctionEventJob(
&handleClientConnected, listen));
return listen;
}
static
void
closeClientListener(CClientListener* listen)
{
if (listen != NULL) {
EVENTQUEUE->removeHandler(CClientListener::getConnectedEvent(), listen);
delete listen;
}
}
static
void
handleScreenError(const CEvent&, void*)
{
LOG((CLOG_CRIT "error on screen"));
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
static void handleSuspend(const CEvent& event, void*);
static void handleResume(const CEvent& event, void*);
static
CScreen*
openServerScreen()
{
CScreen* screen = createScreen();
EVENTQUEUE->adoptHandler(IScreen::getErrorEvent(),
screen->getEventTarget(),
new CFunctionEventJob(
&handleScreenError));
EVENTQUEUE->adoptHandler(IScreen::getSuspendEvent(),
screen->getEventTarget(),
new CFunctionEventJob(
&handleSuspend));
EVENTQUEUE->adoptHandler(IScreen::getResumeEvent(),
screen->getEventTarget(),
new CFunctionEventJob(
&handleResume));
return screen;
}
static
void
closeServerScreen(CScreen* screen)
{
if (screen != NULL) {
EVENTQUEUE->removeHandler(IScreen::getErrorEvent(),
screen->getEventTarget());
EVENTQUEUE->removeHandler(IScreen::getSuspendEvent(),
screen->getEventTarget());
EVENTQUEUE->removeHandler(IScreen::getResumeEvent(),
screen->getEventTarget());
delete screen;
}
}
static
CPrimaryClient*
openPrimaryClient(const CString& name, CScreen* screen)
{
LOG((CLOG_DEBUG1 "creating primary screen"));
return new CPrimaryClient(name, screen);
}
static
void
closePrimaryClient(CPrimaryClient* primaryClient)
{
delete primaryClient;
}
static
void
handleNoClients(const CEvent&, void*)
{
updateStatus();
}
static
void
handleClientsDisconnected(const CEvent&, void*)
{
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
static
CServer*
openServer(const CConfig& config, CPrimaryClient* primaryClient)
{
CServer* server = new CServer(config, primaryClient);
EVENTQUEUE->adoptHandler(CServer::getDisconnectedEvent(), server,
new CFunctionEventJob(handleNoClients));
return server;
}
static
void
closeServer(CServer* server)
{
if (server == NULL) {
return;
}
// tell all clients to disconnect
server->disconnect();
// wait for clients to disconnect for up to timeout seconds
double timeout = 3.0;
CEventQueueTimer* timer = EVENTQUEUE->newOneShotTimer(timeout, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, timer,
new CFunctionEventJob(handleClientsDisconnected));
EVENTQUEUE->adoptHandler(CServer::getDisconnectedEvent(), server,
new CFunctionEventJob(handleClientsDisconnected));
CEvent event;
EVENTQUEUE->getEvent(event);
while (event.getType() != CEvent::kQuit) {
EVENTQUEUE->dispatchEvent(event);
CEvent::deleteData(event);
EVENTQUEUE->getEvent(event);
}
EVENTQUEUE->removeHandler(CEvent::kTimer, timer);
EVENTQUEUE->deleteTimer(timer);
EVENTQUEUE->removeHandler(CServer::getDisconnectedEvent(), server);
// done with server
delete server;
}
static bool initServer();
static bool startServer();
static
void
stopRetryTimer()
{
if (s_timer != NULL) {
EVENTQUEUE->deleteTimer(s_timer);
EVENTQUEUE->removeHandler(CEvent::kTimer, NULL);
s_timer = NULL;
}
}
static
void
retryHandler(const CEvent&, void*)
{
// discard old timer
assert(s_timer != NULL);
stopRetryTimer();
// try initializing/starting the server again
switch (s_serverState) {
case kUninitialized:
case kInitialized:
case kStarted:
assert(0 && "bad internal server state");
break;
case kInitializing:
LOG((CLOG_DEBUG1 "retry server initialization"));
s_serverState = kUninitialized;
if (!initServer()) {
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
break;
case kInitializingToStart:
LOG((CLOG_DEBUG1 "retry server initialization"));
s_serverState = kUninitialized;
if (!initServer()) {
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
else if (s_serverState == kInitialized) {
LOG((CLOG_DEBUG1 "starting server"));
if (!startServer()) {
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
}
break;
case kStarting:
LOG((CLOG_DEBUG1 "retry starting server"));
s_serverState = kInitialized;
if (!startServer()) {
EVENTQUEUE->addEvent(CEvent(CEvent::kQuit));
}
break;
}
}
static
bool
initServer()
{
// skip if already initialized or initializing
if (s_serverState != kUninitialized) {
return true;
}
double retryTime;
CScreen* serverScreen = NULL;
CPrimaryClient* primaryClient = NULL;
try {
CString name = ARG->m_config->getCanonicalName(ARG->m_name);
serverScreen = openServerScreen();
primaryClient = openPrimaryClient(name, serverScreen);
s_serverScreen = serverScreen;
s_primaryClient = primaryClient;
s_serverState = kInitialized;
updateStatus();
return true;
}
catch (XScreenUnavailable& e) {
LOG((CLOG_WARN "cannot open primary screen: %s", e.what()));
closePrimaryClient(primaryClient);
closeServerScreen(serverScreen);
updateStatus(CString("cannot open primary screen: ") + e.what());
retryTime = e.getRetryTime();
}
catch (XScreenOpenFailure& e) {
LOG((CLOG_CRIT "cannot open primary screen: %s", e.what()));
closePrimaryClient(primaryClient);
closeServerScreen(serverScreen);
return false;
}
catch (XBase& e) {
LOG((CLOG_CRIT "failed to start server: %s", e.what()));
closePrimaryClient(primaryClient);
closeServerScreen(serverScreen);
return false;
}
if (ARG->m_restartable) {
// install a timer and handler to retry later
assert(s_timer == NULL);
LOG((CLOG_DEBUG "retry in %.0f seconds", retryTime));
s_timer = EVENTQUEUE->newOneShotTimer(retryTime, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, s_timer,
new CFunctionEventJob(&retryHandler, NULL));
s_serverState = kInitializing;
return true;
}
else {
// don't try again
return false;
}
}
static
bool
startServer()
{
// skip if already started or starting
if (s_serverState == kStarting || s_serverState == kStarted) {
return true;
}
// initialize if necessary
if (s_serverState != kInitialized) {
if (!initServer()) {
// hard initialization failure
return false;
}
if (s_serverState == kInitializing) {
// not ready to start
s_serverState = kInitializingToStart;
return true;
}
assert(s_serverState == kInitialized);
}
double retryTime;
CClientListener* listener = NULL;
try {
listener = openClientListener(ARG->m_config->getSynergyAddress());
s_server = openServer(*ARG->m_config, s_primaryClient);
s_listener = listener;
updateStatus();
LOG((CLOG_NOTE "started server"));
s_serverState = kStarted;
return true;
}
catch (XSocketAddressInUse& e) {
LOG((CLOG_WARN "cannot listen for clients: %s", e.what()));
closeClientListener(listener);
updateStatus(CString("cannot listen for clients: ") + e.what());
retryTime = 10.0;
}
catch (XBase& e) {
LOG((CLOG_CRIT "failed to start server: %s", e.what()));
closeClientListener(listener);
return false;
}
if (ARG->m_restartable) {
// install a timer and handler to retry later
assert(s_timer == NULL);
LOG((CLOG_DEBUG "retry in %.0f seconds", retryTime));
s_timer = EVENTQUEUE->newOneShotTimer(retryTime, NULL);
EVENTQUEUE->adoptHandler(CEvent::kTimer, s_timer,
new CFunctionEventJob(&retryHandler, NULL));
s_serverState = kStarting;
return true;
}
else {
// don't try again
return false;
}
}
static
void
stopServer()
{
if (s_serverState == kStarted) {
closeClientListener(s_listener);
closeServer(s_server);
s_server = NULL;
s_listener = NULL;
s_serverState = kInitialized;
}
else if (s_serverState == kStarting) {
stopRetryTimer();
s_serverState = kInitialized;
}
assert(s_server == NULL);
assert(s_listener == NULL);
}
static
void
cleanupServer()
{
stopServer();
if (s_serverState == kInitialized) {
closePrimaryClient(s_primaryClient);
closeServerScreen(s_serverScreen);
s_primaryClient = NULL;
s_serverScreen = NULL;
s_serverState = kUninitialized;
}
else if (s_serverState == kInitializing ||
s_serverState == kInitializingToStart) {
stopRetryTimer();
s_serverState = kUninitialized;
}
assert(s_primaryClient == NULL);
assert(s_serverScreen == NULL);
assert(s_serverState == kUninitialized);
}
static
void
handleSuspend(const CEvent&, void*)
{
if (!s_suspended) {
LOG((CLOG_INFO "suspend"));
stopServer();
s_suspended = true;
}
}
static
void
handleResume(const CEvent&, void*)
{
if (s_suspended) {
LOG((CLOG_INFO "resume"));
startServer();
s_suspended = false;
}
}
static
void
reloadSignalHandler(CArch::ESignal, void*)
{
EVENTQUEUE->addEvent(CEvent(getReloadConfigEvent(),
IEventQueue::getSystemTarget()));
}
static
void
reloadConfig(const CEvent&, void*)
{
LOG((CLOG_DEBUG "reload configuration"));
if (loadConfig(ARG->m_configFile)) {
if (s_server != NULL) {
s_server->setConfig(*ARG->m_config);
}
LOG((CLOG_NOTE "reloaded configuration"));
}
}
static
void
forceReconnect(const CEvent&, void*)
{
if (s_server != NULL) {
s_server->disconnect();
}
}
static
int
mainLoop()
{
// create socket multiplexer. this must happen after daemonization
// on unix because threads evaporate across a fork().
CSocketMultiplexer multiplexer;
// create the event queue
CEventQueue eventQueue;
// if configuration has no screens then add this system
// as the default
if (ARG->m_config->begin() == ARG->m_config->end()) {
ARG->m_config->addScreen(ARG->m_name);
}
// set the contact address, if provided, in the config.
// otherwise, if the config doesn't have an address, use
// the default.
if (ARG->m_synergyAddress->isValid()) {
ARG->m_config->setSynergyAddress(*ARG->m_synergyAddress);
}
else if (!ARG->m_config->getSynergyAddress().isValid()) {
ARG->m_config->setSynergyAddress(CNetworkAddress(kDefaultPort));
}
// canonicalize the primary screen name
CString primaryName = ARG->m_config->getCanonicalName(ARG->m_name);
if (primaryName.empty()) {
LOG((CLOG_CRIT "unknown screen name `%s'", ARG->m_name.c_str()));
return kExitFailed;
}
// start the server. if this return false then we've failed and
// we shouldn't retry.
LOG((CLOG_DEBUG1 "starting server"));
if (!startServer()) {
return kExitFailed;
}
// handle hangup signal by reloading the server's configuration
ARCH->setSignalHandler(CArch::kHANGUP, &reloadSignalHandler, NULL);
EVENTQUEUE->adoptHandler(getReloadConfigEvent(),
IEventQueue::getSystemTarget(),
new CFunctionEventJob(&reloadConfig));
// handle force reconnect event by disconnecting clients. they'll
// reconnect automatically.
EVENTQUEUE->adoptHandler(getForceReconnectEvent(),
IEventQueue::getSystemTarget(),
new CFunctionEventJob(&forceReconnect));
// run event loop. if startServer() failed we're supposed to retry
// later. the timer installed by startServer() will take care of
// that.
CEvent event;
DAEMON_RUNNING(true);
EVENTQUEUE->getEvent(event);
while (event.getType() != CEvent::kQuit) {
EVENTQUEUE->dispatchEvent(event);
CEvent::deleteData(event);
EVENTQUEUE->getEvent(event);
}
DAEMON_RUNNING(false);
// close down
LOG((CLOG_DEBUG1 "stopping server"));
EVENTQUEUE->removeHandler(getForceReconnectEvent(),
IEventQueue::getSystemTarget());
EVENTQUEUE->removeHandler(getReloadConfigEvent(),
IEventQueue::getSystemTarget());
cleanupServer();
updateStatus();
LOG((CLOG_NOTE "stopped server"));
return kExitSuccess;
}
static
int
daemonMainLoop(int, const char**)
{
#if SYSAPI_WIN32
CSystemLogger sysLogger(DAEMON_NAME, false);
#else
CSystemLogger sysLogger(DAEMON_NAME, true);
#endif
return mainLoop();
}
static
int
standardStartup(int argc, char** argv)
{
if (!ARG->m_daemon) {
ARCH->showConsole(false);
}
// parse command line
parse(argc, argv);
// load configuration
loadConfig();
// daemonize if requested
if (ARG->m_daemon) {
return ARCH->daemonize(DAEMON_NAME, &daemonMainLoop);
}
else {
return mainLoop();
}
}
static
int
run(int argc, char** argv, ILogOutputter* outputter, StartupFunc startup)
{
// general initialization
ARG->m_synergyAddress = new CNetworkAddress;
ARG->m_config = new CConfig;
ARG->m_pname = ARCH->getBasename(argv[0]);
// install caller's output filter
if (outputter != NULL) {
CLOG->insert(outputter);
}
// save log messages
CBufferedLogOutputter logBuffer(1000);
CLOG->insert(&logBuffer, true);
// make the task bar receiver. the user can control this app
// through the task bar.
s_taskBarReceiver = createTaskBarReceiver(&logBuffer);
// run
int result = startup(argc, argv);
// done with task bar receiver
delete s_taskBarReceiver;
// done with log buffer
CLOG->remove(&logBuffer);
delete ARG->m_config;
delete ARG->m_synergyAddress;
return result;
}
//
// command line parsing
//
#define BYE "\nTry `%s --help' for more information."
static void (*bye)(int) = &exit;
static
void
version()
{
LOG((CLOG_PRINT
"%s %s, protocol version %d.%d\n"
"%s",
ARG->m_pname,
kVersion,
kProtocolMajorVersion,
kProtocolMinorVersion,
kCopyright));
}
static
void
help()
{
#if WINAPI_XWINDOWS
# define USAGE_DISPLAY_ARG \
" [--display <display>]"
# define USAGE_DISPLAY_INFO \
" --display <display> connect to the X server at <display>\n"
#else
# define USAGE_DISPLAY_ARG
# define USAGE_DISPLAY_INFO
#endif
#if SYSAPI_WIN32
# define PLATFORM_ARGS \
" [--daemon|--no-daemon]"
# define PLATFORM_DESC
# define PLATFORM_EXTRA \
"At least one command line argument is required. If you don't otherwise\n" \
"need an argument use `--daemon'.\n" \
"\n"
#else
# define PLATFORM_ARGS \
" [--daemon|--no-daemon]"
# define PLATFORM_DESC
# define PLATFORM_EXTRA
#endif
LOG((CLOG_PRINT
"Usage: %s"
" [--address <address>]"
" [--config <pathname>]"
" [--debug <level>]"
USAGE_DISPLAY_ARG
" [--name <screen-name>]"
" [--restart|--no-restart]"
PLATFORM_ARGS
"\n\n"
"Start the synergy mouse/keyboard sharing server.\n"
"\n"
" -a, --address <address> listen for clients on the given address.\n"
" -c, --config <pathname> use the named configuration file instead.\n"
" -d, --debug <level> filter out log messages with priorty below level.\n"
" level may be: FATAL, ERROR, WARNING, NOTE, INFO,\n"
" DEBUG, DEBUG1, DEBUG2.\n"
USAGE_DISPLAY_INFO
" -f, --no-daemon run the server in the foreground.\n"
"* --daemon run the server as a daemon.\n"
" -n, --name <screen-name> use screen-name instead the hostname to identify\n"
" this screen in the configuration.\n"
" -1, --no-restart do not try to restart the server if it fails for\n"
" some reason.\n"
"* --restart restart the server automatically if it fails.\n"
PLATFORM_DESC
" -h, --help display this help and exit.\n"
" --version display version information and exit.\n"
"\n"
"* marks defaults.\n"
"\n"
PLATFORM_EXTRA
"The argument for --address is of the form: [<hostname>][:<port>]. The\n"
"hostname must be the address or hostname of an interface on the system.\n"
"The default is to listen on all interfaces. The port overrides the\n"
"default port, %d.\n"
"\n"
"If no configuration file pathname is provided then the first of the\n"
"following to load successfully sets the configuration:\n"
" %s\n"
" %s\n"
"If no configuration file can be loaded then the configuration uses its\n"
"defaults with just the server screen.\n"
"\n"
"Where log messages go depends on the platform and whether or not the\n"
"server is running as a daemon.",
ARG->m_pname,
kDefaultPort,
ARCH->concatPath(
ARCH->getUserDirectory(),
USR_CONFIG_NAME).c_str(),
ARCH->concatPath(
ARCH->getSystemDirectory(),
SYS_CONFIG_NAME).c_str()));
}
static
bool
isArg(int argi, int argc, const char* const* argv,
const char* name1, const char* name2,
int minRequiredParameters = 0)
{
if ((name1 != NULL && strcmp(argv[argi], name1) == 0) ||
(name2 != NULL && strcmp(argv[argi], name2) == 0)) {
// match. check args left.
if (argi + minRequiredParameters >= argc) {
LOG((CLOG_PRINT "%s: missing arguments for `%s'" BYE,
ARG->m_pname, argv[argi], ARG->m_pname));
bye(kExitArgs);
}
return true;
}
// no match
return false;
}
static
void
parse(int argc, const char* const* argv)
{
assert(ARG->m_pname != NULL);
assert(argv != NULL);
assert(argc >= 1);
// set defaults
ARG->m_name = ARCH->getHostName();
// parse options
int i = 1;
for (; i < argc; ++i) {
if (isArg(i, argc, argv, "-d", "--debug", 1)) {
// change logging level
ARG->m_logFilter = argv[++i];
}
else if (isArg(i, argc, argv, "-a", "--address", 1)) {
// save listen address
try {
*ARG->m_synergyAddress = CNetworkAddress(argv[i + 1],
kDefaultPort);
ARG->m_synergyAddress->resolve();
}
catch (XSocketAddress& e) {
LOG((CLOG_PRINT "%s: %s" BYE,
ARG->m_pname, e.what(), ARG->m_pname));
bye(kExitArgs);
}
++i;
}
else if (isArg(i, argc, argv, "-n", "--name", 1)) {
// save screen name
ARG->m_name = argv[++i];
}
else if (isArg(i, argc, argv, "-c", "--config", 1)) {
// save configuration file path
ARG->m_configFile = argv[++i];
}
#if WINAPI_XWINDOWS
else if (isArg(i, argc, argv, "-display", "--display", 1)) {
// use alternative display
ARG->m_display = argv[++i];
}
#endif
else if (isArg(i, argc, argv, "-f", "--no-daemon")) {
// not a daemon
ARG->m_daemon = false;
}
else if (isArg(i, argc, argv, NULL, "--daemon")) {
// daemonize
ARG->m_daemon = true;
}
else if (isArg(i, argc, argv, "-1", "--no-restart")) {
// don't try to restart
ARG->m_restartable = false;
}
else if (isArg(i, argc, argv, NULL, "--restart")) {
// try to restart
ARG->m_restartable = true;
}
else if (isArg(i, argc, argv, "-z", NULL)) {
ARG->m_backend = true;
}
else if (isArg(i, argc, argv, "-h", "--help")) {
help();
bye(kExitSuccess);
}
else if (isArg(i, argc, argv, NULL, "--version")) {
version();
bye(kExitSuccess);
}
else if (isArg(i, argc, argv, "--", NULL)) {
// remaining arguments are not options
++i;
break;
}
else if (argv[i][0] == '-') {
LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
ARG->m_pname, argv[i], ARG->m_pname));
bye(kExitArgs);
}
else {
// this and remaining arguments are not options
break;
}
}
// no non-option arguments are allowed
if (i != argc) {
LOG((CLOG_PRINT "%s: unrecognized option `%s'" BYE,
ARG->m_pname, argv[i], ARG->m_pname));
bye(kExitArgs);
}
// increase default filter level for daemon. the user must
// explicitly request another level for a daemon.
if (ARG->m_daemon && ARG->m_logFilter == NULL) {
#if SYSAPI_WIN32
if (CArchMiscWindows::isWindows95Family()) {
// windows 95 has no place for logging so avoid showing
// the log console window.
ARG->m_logFilter = "FATAL";
}
else
#endif
{
ARG->m_logFilter = "NOTE";
}
}
// set log filter
if (!CLOG->setFilter(ARG->m_logFilter)) {
LOG((CLOG_PRINT "%s: unrecognized log level `%s'" BYE,
ARG->m_pname, ARG->m_logFilter, ARG->m_pname));
bye(kExitArgs);
}
// identify system
LOG((CLOG_INFO "Synergy server %s on %s", kVersion, ARCH->getOSName().c_str()));
}
static
bool
loadConfig(const CString& pathname)
{
try {
// load configuration
LOG((CLOG_DEBUG "opening configuration \"%s\"", pathname.c_str()));
std::ifstream configStream(pathname.c_str());
if (!configStream.is_open()) {
// report failure to open configuration as a debug message
// since we try several paths and we expect some to be
// missing.
LOG((CLOG_DEBUG "cannot open configuration \"%s\"",
pathname.c_str()));
return false;
}
configStream >> *ARG->m_config;
LOG((CLOG_DEBUG "configuration read successfully"));
return true;
}
catch (XConfigRead& e) {
// report error in configuration file
LOG((CLOG_ERR "cannot read configuration \"%s\": %s",
pathname.c_str(), e.what()));
}
return false;
}
static
void
loadConfig()
{
bool loaded = false;
// load the config file, if specified
if (!ARG->m_configFile.empty()) {
loaded = loadConfig(ARG->m_configFile);
}
// load the default configuration if no explicit file given
else {
// get the user's home directory
CString path = ARCH->getUserDirectory();
if (!path.empty()) {
// complete path
path = ARCH->concatPath(path, USR_CONFIG_NAME);
// now try loading the user's configuration
if (loadConfig(path)) {
loaded = true;
ARG->m_configFile = path;
}
}
if (!loaded) {
// try the system-wide config file
path = ARCH->getSystemDirectory();
if (!path.empty()) {
path = ARCH->concatPath(path, SYS_CONFIG_NAME);
if (loadConfig(path)) {
loaded = true;
ARG->m_configFile = path;
}
}
}
}
if (!loaded) {
LOG((CLOG_PRINT "%s: no configuration available", ARG->m_pname));
bye(kExitConfig);
}
}
//
// platform dependent entry points
//
#if SYSAPI_WIN32
static bool s_hasImportantLogMessages = false;
//
// CMessageBoxOutputter
//
// This class writes severe log messages to a message box
//
class CMessageBoxOutputter : public ILogOutputter {
public:
CMessageBoxOutputter() { }
virtual ~CMessageBoxOutputter() { }
// ILogOutputter overrides
virtual void open(const char*) { }
virtual void close() { }
virtual void show(bool) { }
virtual bool write(ELevel level, const char* message);
virtual const char* getNewline() const { return ""; }
};
bool
CMessageBoxOutputter::write(ELevel level, const char* message)
{
// note any important messages the user may need to know about
if (level <= CLog::kWARNING) {
s_hasImportantLogMessages = true;
}
// FATAL and PRINT messages get a dialog box if not running as
// backend. if we're running as a backend the user will have
// a chance to see the messages when we exit.
if (!ARG->m_backend && level <= CLog::kFATAL) {
MessageBox(NULL, message, ARG->m_pname, MB_OK | MB_ICONWARNING);
return false;
}
else {
return true;
}
}
static
void
byeThrow(int x)
{
CArchMiscWindows::daemonFailed(x);
}
static
int
daemonNTMainLoop(int argc, const char** argv)
{
parse(argc, argv);
ARG->m_backend = false;
loadConfig();
return CArchMiscWindows::runDaemon(mainLoop);
}
static
int
daemonNTStartup(int, char**)
{
CSystemLogger sysLogger(DAEMON_NAME, false);
bye = &byeThrow;
return ARCH->daemonize(DAEMON_NAME, &daemonNTMainLoop);
}
static
int
foregroundStartup(int argc, char** argv)
{
ARCH->showConsole(false);
// parse command line
parse(argc, argv);
// load configuration
loadConfig();
// never daemonize
return mainLoop();
}
static
void
showError(HINSTANCE instance, const char* title, UINT id, const char* arg)
{
CString fmt = CMSWindowsUtil::getString(instance, id);
CString msg = CStringUtil::format(fmt.c_str(), arg);
MessageBox(NULL, msg.c_str(), title, MB_OK | MB_ICONWARNING);
}
int WINAPI
WinMain(HINSTANCE instance, HINSTANCE, LPSTR, int)
{
try {
CArchMiscWindows::setIcons((HICON)LoadImage(instance,
MAKEINTRESOURCE(IDI_SYNERGY),
IMAGE_ICON,
32, 32, LR_SHARED),
(HICON)LoadImage(instance,
MAKEINTRESOURCE(IDI_SYNERGY),
IMAGE_ICON,
16, 16, LR_SHARED));
CArch arch(instance);
CMSWindowsScreen::init(instance);
CLOG;
CThread::getCurrentThread().setPriority(-14);
CArgs args;
// set title on log window
ARCH->openConsole((CString(kAppVersion) + " " + "Server").c_str());
// windows NT family starts services using no command line options.
// since i'm not sure how to tell the difference between that and
// a user providing no options we'll assume that if there are no
// arguments and we're on NT then we're being invoked as a service.
// users on NT can use `--daemon' or `--no-daemon' to force us out
// of the service code path.
StartupFunc startup = &standardStartup;
if (!CArchMiscWindows::isWindows95Family()) {
if (__argc <= 1) {
startup = &daemonNTStartup;
}
else {
startup = &foregroundStartup;
}
}
// send PRINT and FATAL output to a message box
int result = run(__argc, __argv, new CMessageBoxOutputter, startup);
// let user examine any messages if we're running as a backend
// by putting up a dialog box before exiting.
if (args.m_backend && s_hasImportantLogMessages) {
showError(instance, args.m_pname, IDS_FAILED, "");
}
delete CLOG;
return result;
}
catch (XBase& e) {
showError(instance, __argv[0], IDS_UNCAUGHT_EXCEPTION, e.what());
throw;
}
catch (XArch& e) {
showError(instance, __argv[0], IDS_INIT_FAILED, e.what().c_str());
return kExitFailed;
}
catch (...) {
showError(instance, __argv[0], IDS_UNCAUGHT_EXCEPTION, "<unknown>");
throw;
}
}
#elif SYSAPI_UNIX
int
main(int argc, char** argv)
{
CArgs args;
try {
int result;
CArch arch;
CLOG;
CArgs args;
result = run(argc, argv, NULL, &standardStartup);
delete CLOG;
return result;
}
catch (XBase& e) {
LOG((CLOG_CRIT "Uncaught exception: %s\n", e.what()));
throw;
}
catch (XArch& e) {
LOG((CLOG_CRIT "Initialization failed: %s" BYE, e.what().c_str()));
return kExitFailed;
}
catch (...) {
LOG((CLOG_CRIT "Uncaught exception: <unknown exception>\n"));
throw;
}
}
#else
#error no main() for platform
#endif
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