From 8252b7b1a496adeab18e7fdf78b506efcfde823c Mon Sep 17 00:00:00 2001
From: Jente Hidskes <dev@hjdskes.nl>
Date: Sat, 25 Jan 2020 22:51:15 +0100
Subject: [PATCH] Cage: check if XDG_RUNTIME_DIR is set

Wayland requires this environment variable to be set, see
https://manpages.debian.org/experimental/libwayland-doc/wl_display_connect.3.en.html
---
 cage.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cage.c b/cage.c
index b911370..9526e82 100644
--- a/cage.c
+++ b/cage.c
@@ -194,6 +194,12 @@ main(int argc, char *argv[])
 	wlr_log_init(WLR_ERROR, NULL);
 #endif
 
+	/* Wayland requires XDG_RUNTIME_DIR to be set. */
+	if (!getenv("XDG_RUNTIME_DIR")) {
+		wlr_log(WLR_ERROR, "XDG_RUNTIME_DIR is not set in the environment");
+		return 1;
+	}
+
 	server.wl_display = wl_display_create();
 	if (!server.wl_display) {
 		wlr_log(WLR_ERROR, "Cannot allocate a Wayland display");