Check if at least one Wayland session is running - c++

Question

I'm using Qt and want to check if any Wayland session is running.
For now I have this just for test code, that works as expected:
QProcess process;
process.setProgram("bash");
process.setArguments({"-c", "loginctl list-sessions --no-legend | awk '{print $1}'"});
process.start();
process.waitForFinished();
const QByteArrayList sessionsList = process.readAll().split('\n');
foreach (const QByteArray &sessionID, sessionsList) {
if (sessionID.isEmpty())
continue;
process.setArguments({"-c", "loginctl show-session " + sessionID});
process.start();
process.waitForFinished();
if (process.readAll().contains("Type=wayland"))
qDebug() << "At least one Wayland session is running";
}
Is it possible to get rid of QProcess and use Linux C++ API?

Answer 1

You can try to connect to Wayland. If you can connect to a Wayland composer it is running otherwise is not running or someone haven't set the environment variables correctly and not used the default name.
#include <wayland/wayland-client-core.h>
bool isWaylandRunning(){
auto display = wl_display_connect(nullptr);
if (display){
wl_display_disconnect(display);
return true;
} else {
return false;
}
}