wait for compositor

wayland.c

@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <poll.h>
 #include <sys/mman.h>
 #include <wayland-client.h>
 #include <xkbcommon/xkbcommon.h>
@@ -321,11 +322,8 @@ waylandthread(void *_)
 
 	(void)_;
 	threadsetname("wayland");
-	dpy = wl_display_connect(nil);
-	if(dpy == nil){
-		fprint(2, "strans: wayland: cannot connect to display\n");
-		return;
-	}
+	while((dpy = wl_display_connect(nil)) == nil)
+		poll(nil, 0, 1000);
 	xkb = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
 	if(xkb == nil){
 		wl_display_disconnect(dpy);