bool
KUniqueApplication::start(StartFlags flags)
{
extern bool s_kuniqueapplication_startCalled;
if (s_kuniqueapplication_startCalled) {
return true;
}
s_kuniqueapplication_startCalled = true;
addCmdLineOptions(); // Make sure to add cmd line options
#if defined(Q_OS_WIN) || defined(Q_OS_MACX)
Private::s_startOwnInstance = true;
#else
KCmdLineArgs *args = KCmdLineArgs::parsedArgs("kuniqueapp");
Private::s_startOwnInstance = !args->isSet("fork");
#endif
QString appName = KCmdLineArgs::aboutData()->appName();
const QStringList parts = KCmdLineArgs::aboutData()->organizationDomain().split(QLatin1Char('.'), QString::SkipEmptyParts);
if (parts.isEmpty()) {
appName.prepend(QLatin1String("local."));
} else
foreach (const QString &s, parts) {
appName.prepend(QLatin1Char('.'));
appName.prepend(s);
}
bool
KUniqueApplication::start()
{
if( s_uniqueTestDone )
return true;
s_uniqueTestDone = true;
addCmdLineOptions(); // Make sure to add cmd line options
#ifdef Q_WS_WIN
s_nofork = true;
#else
TDECmdLineArgs *args = TDECmdLineArgs::parsedArgs("kuniqueapp");
s_nofork = !args->isSet("fork");
delete args;
#endif
TQCString appName = TDECmdLineArgs::about->appName();
if (s_nofork)
{
if (s_multipleInstances)
{
TQCString pid;
pid.setNum(getpid());
appName = appName + "-" + pid;
}
// Check to make sure that we're actually able to register with the DCOP
// server.
#ifndef Q_WS_WIN //TODO
if(dcopClient()->registerAs(appName, false).isEmpty()) {
startKdeinit();
if(dcopClient()->registerAs(appName, false).isEmpty()) {
kdError() << "KUniqueApplication: Can't setup DCOP communication." << endl;
::exit(255);
}
}
#endif
// We'll call newInstance in the constructor. Do nothing here.
return true;
}
DCOPClient *dc;
int fd[2];
signed char result;
if (0 > pipe(fd))
{
kdError() << "KUniqueApplication: pipe() failed!" << endl;
::exit(255);
}
int fork_result = fork();
switch(fork_result) {
case -1:
kdError() << "KUniqueApplication: fork() failed!" << endl;
::exit(255);
break;
case 0:
// Child
::close(fd[0]);
if (s_multipleInstances)
appName.append("-").append(TQCString().setNum(getpid()));
dc = dcopClient();
{
TQCString regName = dc->registerAs(appName, false);
if (regName.isEmpty())
{
// Check DISPLAY
if (TQCString(getenv(DISPLAY)).isEmpty())
{
kdError() << "KUniqueApplication: Can't determine DISPLAY. Aborting." << endl;
result = -1; // Error
::write(fd[1], &result, 1);
::exit(255);
}
// Try to launch tdeinit.
startKdeinit();
regName = dc->registerAs(appName, false);
if (regName.isEmpty())
{
kdError() << "KUniqueApplication: Can't setup DCOP communication." << endl;
result = -1;
delete dc; // Clean up DCOP commmunication
::write(fd[1], &result, 1);
::exit(255);
}
}
if (regName != appName)
{
// Already running. Ok.
result = 0;
delete dc; // Clean up DCOP commmunication
::write(fd[1], &result, 1);
::close(fd[1]);
#if 0
#ifdef Q_WS_X11
// say we're up and running ( probably no new window will appear )
TDEStartupInfoId id;
if( kapp != NULL ) // TDEApplication constructor unsets the env. variable
id.initId( kapp->startupId());
else
id = TDEStartupInfo::currentStartupIdEnv();
if( !id.none())
{
Display* disp = XOpenDisplay( NULL );
if( disp != NULL ) // use extra X connection
{
TDEStartupInfo::sendFinishX( disp, id );
XCloseDisplay( disp );
}
}
#else //FIXME(E): implement
#endif
#endif
return false;
}
dc->setPriorityCall(true);
}
{
#ifdef Q_WS_X11
TDEStartupInfoId id;
if( kapp != NULL ) // TDEApplication constructor unsets the env. variable
id.initId( kapp->startupId());
else
id = TDEStartupInfo::currentStartupIdEnv();
if( !id.none())
{ // notice about pid change
Display* disp = XOpenDisplay( NULL );
if( disp != NULL ) // use extra X connection
{
TDEStartupInfoData data;
data.addPid( getpid());
TDEStartupInfo::sendChangeX( disp, id, data );
XCloseDisplay( disp );
}
}
#else //FIXME(E): Implement
#endif
}
result = 0;
::write(fd[1], &result, 1);
::close(fd[1]);
return true; // Finished.
default:
// Parent
// DCOPClient::emergencyClose();
// dcopClient()->detach();
if (s_multipleInstances)
appName.append("-").append(TQCString().setNum(fork_result));
::close(fd[1]);
for(;;)
{
int n = ::read(fd[0], &result, 1);
if (n == 1) break;
if (n == 0)
{
kdError() << "KUniqueApplication: Pipe closed unexpectedly." << endl;
::exit(255);
}
if (errno != EINTR)
{
kdError() << "KUniqueApplication: Error reading from pipe." << endl;
::exit(255);
}
}
::close(fd[0]);
if (result != 0)
::exit(result); // Error occurred in child.
dc = new DCOPClient();
if (!dc->attach())
{
kdError() << "KUniqueApplication: Parent process can't attach to DCOP." << endl;
delete dc; // Clean up DCOP commmunication
::exit(255);
}
if (!dc->isApplicationRegistered(appName)) {
kdError() << "KUniqueApplication: Registering failed!" << endl;
}
TQCString new_asn_id;
#if defined Q_WS_X11
TDEStartupInfoId id;
if( kapp != NULL ) // TDEApplication constructor unsets the env. variable
id.initId( kapp->startupId());
else
id = TDEStartupInfo::currentStartupIdEnv();
if( !id.none())
new_asn_id = id.id();
#endif
TQByteArray data, reply;
TQDataStream ds(data, IO_WriteOnly);
TDECmdLineArgs::saveAppArgs(ds);
ds << new_asn_id;
dc->setPriorityCall(true);
TQCString replyType;
if (!dc->call(appName, TDECmdLineArgs::about->appName(), "newInstance()", data, replyType, reply))
{
kdError() << "Communication problem with " << TDECmdLineArgs::about->appName() << ", it probably crashed." << endl;
delete dc; // Clean up DCOP commmunication
::exit(255);
}
dc->setPriorityCall(false);
if (replyType != "int")
{
kdError() << "KUniqueApplication: DCOP communication error!" << endl;
delete dc; // Clean up DCOP commmunication
::exit(255);
}
TQDataStream rs(reply, IO_ReadOnly);
int exitCode;
rs >> exitCode;
delete dc; // Clean up DCOP commmunication
::exit(exitCode);
break;
}
return false; // make insure++ happy
}
