bytemedia

commit: 100970ba9410a0571c15a0261e9b3d1a93210440
parent 01765eace2b83bc543e23044352c92db39680f5a
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Tue, 22 Jun 2021 16:12:36 +0200

C/wayland: Add fatal errors

Diffstat:
M
C/wayland.c
19
+++++++++++++++++--

1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/C/wayland.c b/C/wayland.c
@@ -5,6 +5,8 @@
 #include <fcntl.h>
 #include <limits.h>
 #include <stdbool.h>
+#include <stdlib.h> /* exit(), EXIT_FAILURE */
+#include <stdio.h> /* fputs(), stderr */
 #include <string.h>
 #include <sys/mman.h>
 #include <time.h>
@@ -260,19 +262,32 @@ static const struct wl_registry_listener wl_registry_listener = {
     .global_remove = registry_global_remove,
 };
 
+static void
+fatal(const char *message) {
+	fputs(message, stderr);
+	exit(EXIT_FAILURE);
+}
+
 int
 main(int argc, char *argv[])
 {
 	struct client_state state = {0};
-	state.wl_display          = wl_display_connect(NULL);
-	state.wl_registry         = wl_display_get_registry(state.wl_display);
 	state.width               = 800;
 	state.height              = 600;
 	state.closed              = false;
 
+	state.wl_display          = wl_display_connect(NULL);
+	if(!state.wl_display) fatal("Failed to connect to wayland display, exiting...\n");
+
+	state.wl_registry         = wl_display_get_registry(state.wl_display);
 	wl_registry_add_listener(state.wl_registry, &wl_registry_listener, &state);
+
 	wl_display_roundtrip(state.wl_display);
 
+	if(!state.wl_shm) fatal("wl_shm protocol not found, exiting...\n");
+	if(!state.wl_compositor) fatal("wl_compositor protocol not found, exiting...\n");
+	if(!state.xdg_wm_base) fatal("xdg_wm_base protocol not found, exiting...\n");
+
 	state.wl_surface  = wl_compositor_create_surface(state.wl_compositor);
 	state.xdg_surface = xdg_wm_base_get_xdg_surface(state.xdg_wm_base, state.wl_surface);
 	xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);