Qt App as init process

janhieber

Hi,

currently i have a QT GUI app running on a Buildroot Linux on RPI.
The app runs without X11/wayland with the following environment variables:

QT_QPA_PLATFORM=linuxfb:fb=/dev/fb0
QT_QPA_EGLFS_WIDTH=800
QT_QPA_EGLFS_HEIGHT=600

And the following parameters:

 -plugin EvdevMouse -plugin EvdevKeyboard

Now I want to use the app as init process, started directly from kernel.
For this to work I do the init stuff (mounting /tmp /dev ...) in main() at the beginning.

My only problem is: When i launch the app with the kernel "init=" parameter,
i can not set the environment variables or the parameters.

So is there a way to do both, QPA and Plugins in C code in the app?

SGaist

Hi and welcome to devnet,

Why not use a script to start your application ?

By the way, shouldn't it rather be launched by your init manager (systemd, init, etc.) ?

In any case, qputenv could be used to set the environment variables and you would have to modify by hand argc and argv before passing them to your QApplication instance.