Using QLocalServer over QtService : how to set security attributes to named pipe created by QLocalServer?

Question

I am trying to use QLocalServer in service application on win7. QLocalServer's windows implementation uses named pipes, and since winVista try to access it from GUI causes error. There was even QT bug about it, but trolls closed it without any fixing. So my question is: Is there a way to change security attributes of already created in service named pipe to make it accessible from gui applications? Or the only way is copypaste QT QLocalServer object and add security attributes to its code which creates pipe? I grant access to pipes handles with

template <class To, class From> inline To* d_ptr(From* ptr)
{
    return (To*)QObjectPrivate::get(ptr);
}
...
QLocalServerPrivate* p=d_ptr<QLocalServerPrivate>(this);

But what to do with them now?

score 0 · Answer 1 · answered Dec 27 '16 at 15:52

I faced with the same problem few years ago. Maybe it already fixed in latest Qt version. I resolved the problem with next workaround:

bool fixLocalServerPermissions(QLocalServer *server)
{
    QString pipeName = server->fullServerName();

    HANDLE h = CreateNamedPipeA(pipeName.toStdString().c_str(), PIPE_ACCESS_DUPLEX | WRITE_DAC,
            PIPE_TYPE_MESSAGE, PIPE_UNLIMITED_INSTANCES, 1024*16, 1024*16, 0, NULL);

    if (h == INVALID_HANDLE_VALUE)
        return false;

    bool status = SetSecurityInfo(h, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, NULL, NULL) == ERROR_SUCCESS;
    CloseHandle(h);

    return status;
}

score 0 · Accepted Answer · answered Dec 17 '10 at 16:24

0

if believe to this pipe security attributes cannot be changed under LocalAdmin user... so I edited QLocalServer, which i did not wanted to do :(

answered Dec 17 '10 at 16:24

Raiv

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Using QLocalServer over QtService : how to set security attributes to named pipe created by QLocalServer?

2 Answers2