From 5081731862b0185be70493fb7a6718dc26f530a7 Mon Sep 17 00:00:00 2001
From: smitsohu <smitsohu@gmail.com>
Date: Mon, 10 Aug 2020 20:18:26 +0200
Subject: [PATCH] chroot: expose x11 session if FIREJAIL_CHROOT_X11 is set

add check so that environment variable FIREJAIL_CHROOT_X11 can be used
to mount /tmp/.X11-unix into the chroot; issue #3568
---
 src/firejail/chroot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/firejail/chroot.c b/src/firejail/chroot.c
index cae52e20b..5fc6c8298 100644
--- a/src/firejail/chroot.c
+++ b/src/firejail/chroot.c
@@ -165,7 +165,8 @@ void fs_chroot(const char *rootdir) {
 	close(fd);
 
 	// x11
-	if (getenv("FIREJAIL_X11")) {
+	// if users want this mount, they should set FIREJAIL_CHROOT_X11
+	if (getenv("FIREJAIL_X11") || getenv("FIREJAIL_CHROOT_X11")) {
 		if (arg_debug)
 			printf("Mounting /tmp/.X11-unix on chroot /tmp/.X11-unix\n");
 		check_subdir(parentfd, "tmp/.X11-unix", 0);