display_globals.cpp

#include <stdint.h>
#include <stdio.h>
#include <wayland-client.h>

static void
registry_handle_global(void *data, struct wl_registry *registry,
        uint32_t name, const char *interface, uint32_t version)
        {
    printf("interface: '%s', version: %d, name: %d\n",
           interface, version, name);
        }

        static void
        registry_handle_global_remove(void *data, struct wl_registry *registry,
                uint32_t name)
                {
    // This space deliberately left blank
                }

                static const struct wl_registry_listener
                        registry_listener = {
        .global = registry_handle_global,
        .global_remove = registry_handle_global_remove,
        };

int
main(int argc, char *argv[])
{
    struct wl_display *display = wl_display_connect(NULL);
    struct wl_registry *registry = wl_display_get_registry(display);
    wl_registry_add_listener(registry, &registry_listener, NULL);
    wl_display_roundtrip(display);
    return 0;
}