Merge remote-tracking branch 'origin/master'

1 files changed, 28 insertions, 0 deletions

diff --git a/.config/login.d/02_xdg_runtime_dir.sh b/.config/login.d/02_xdg_runtime_dir.sh
new file mode 100644
index 0000000..6d93359
--- /dev/null
+++ b/.config/login.d/02_xdg_runtime_dir.sh
@@ -0,0 +1,28 @@
+# This should be readable by /bin/sh
+
+# Set XDG_RUNTIME_DIR if we can
+if [ -z "$XDG_RUNTIME_DIR" ] && shopt -q login_shell && type flock &>/dev/null; then
+	_diy_xdg_runtime_login() {
+		export XDG_RUNTIME_DIR="$XDG_CACHE_HOME/xdg-runtime-dir/$HOSTNAME"
+		# There's a race condition here, between the `ln -s` and `flock`.
+		# But it's not like I'll be hammering a box with logins.
+		if [ ! -d "$XDG_RUNTIME_DIR" ]; then
+			local tmp="$(mktemp -d --tmpdir -- "${USER}@${HOSTNAME}-runtime.XXXXXXXXXX")"
+			mkdir -p -- "$XDG_CACHE_HOME/xdg-runtime-dir"
+			ln -sfT -- "$tmp" "$XDG_RUNTIME_DIR"
+		fi
+		if ! [ /dev/fd/7 -ef "$XDG_CACHE_HOME/xdg-runtime-dir/.lock" ]; then
+			exec 7>"$XDG_CACHE_HOME/xdg-runtime-dir/.lock"
+			if flock -sn 7; then
+				# Unfortunately this doesn't survive across exec(1).
+				trap _diy_xdg_runtime_logout EXIT
+			fi
+		fi
+	}
+	_diy_xdg_runtime_logout() {
+		if flock -xn 7; then
+			rm -rf -- "$(readlink "$XDG_RUNTIME_DIR")"
+		fi
+	}
+	_diy_xdg_runtime_login
+fi