Linux open file dialog

Im trying to program a open file dialog in C. I dont want to use any gui projects.

It seems there's XORG and wayland so I'm guessing I need to implement open file dialog for both of those.

So far my program looks like this

#ifdef _WIN32

        OPENFILENAME  ofd;        
        memset(&ofd,0,sizeof(ofd));
        ofd.lStructSize     = sizeof(ofd);
        ofd.lpstrFile       = filename;
        ofd.nMaxFile        = MAX_PATH;
        ofd.Flags           = OFN_FILEMUSTEXIST;
    #endif

#ifdef __linux__
        
#endif