Function fetch_display

src/utils/utils.c:10–20

* On X, use X display variable; * On Wl, use Wl display variable; * Otherwise, use NULL device * (ie: we are neither on x or wayland; try drm plugin) */

 * (ie: we are neither on x or wayland; try drm plugin)
 */
const char *fetch_display() {
    /*
     * Use wayland as first case, 
     * as sometimes on wayland you have $DISPLAY env var too!
     */
    const char *wl_display = getenv("WAYLAND_DISPLAY");
    if (!is_string_empty(wl_display)) {
        return wl_display;
    }
    return getenv("DISPLAY");
}

/*
 * On X, use xauthority