How to autoRun the command "dbus-daemon --config-file=session.conf"?

[to_guliang]

Pass the arguments in a form of a string list as a second argument to startDetached().

thanks very much.

i tried what you said as following manner,
but it doesn't work.
At the same time, i have tried "QString program = "/DBusEssential/dbus-daemon.exe". It doesn't work.

could you tell me what's wrong in my code? Thanks a lot.

QString program = "/DBusEssential/dbus-daemon";
    QStringList arguments;
    arguments << "--config-file" << "=" << "/DBusEssential/session.conf";
    QProcess::startDetached(program,arguments);

QString program = "/DBusEssential/dbus-daemon";
    QStringList arguments;
    arguments << "--config-file" << "=" << "/DBusEssential/session.conf";
    QProcess::startDetached(program,arguments);

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[wysota]

It seems to me "--config-file=/DBusEssential/session.conf" is a single argument and not three separate ones.

[to_guliang]

It seems to me "--config-file=/DBusEssential/session.conf" is a single argument and not three separate ones.

Putting the "--config-file=/DBusEssential/session.conf" in a single argument doesn't work........

[wysota]

Any details on how "doesn't work" occur?

[ChrisW67]

You haven't established whether the command you are trying to run works at all. If you type exactly this:

/DBusEssential/dbus-daemon --config-file=/DBusEssential/session.conf

/DBusEssential/dbus-daemon --config-file=/DBusEssential/session.conf

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into your terminal, with the same environment as the application will have, does it run? Does it give you meaningful errors if it doesn't?

[to_guliang]

Thanks to wysota and ChrisW67!!!!!!

i must say sorry . today i do as ChrisW67 says, it doesn't work in terminal. I remember that i have tried "/DBusEssential/dbus-daemon --config-file=/DBusEssential/session.conf" in my terminal and it works. the facts prove that i have misremember.

now, i copy the "dbus-daemon.exe" and "session.conf" to the project root directory, the effective code is follows:

QString program = "dbus-daemon.exe";
    QStringList arguments;
    arguments << "--config-file=session.conf";
    QProcess::startDetached(program,arguments);

QString program = "dbus-daemon.exe";
    QStringList arguments;
    arguments << "--config-file=session.conf";
    QProcess::startDetached(program,arguments);

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but now there is another problem, a terminal window named "d:\QtProject\dbus-chat\dbus-daemon.exe" will appear in my desktop. As you know, the client won't accept this window.
Maybe there is a better way to autorun the dbus-daemon.exe without the terminal window?

[to_guliang]

The following code will do the right thing. the "dbus-daemon.exe" will exit if the application exit:

QString program = "dbus-daemon.exe";
QStringList arguments;
   arguments << "--config-file=session.conf";
 
QProcess myProcess;
     myProcess.start(program, arguments);

QString program = "dbus-daemon.exe";
QStringList arguments;
   arguments << "--config-file=session.conf";

QProcess myProcess;
     myProcess.start(program, arguments);

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Thanks to all!

[ChrisW67]

Be a little careful because the program's working directory may not be be same as the application executable's location: you might want to use QCoreApplication::applicationDirPath() to find dbus-daemon.

Regarding the console window:

• Does using the DBus "--fork" option help?
• Is "dbus-launch" of any use?
• Does making the command equivalent to "cmd /c start /b dbus-daemon --config-file=session.conf" help?
• Does capturing the program output stream help?