Improved env detection

.config/sway/kdpi/genbg.bash

@@ -1,7 +1,10 @@
 #!/usr/bin/bash -x
 
 # Check that SWAYSOCK is in the env before doing anything
-[ -z "$SWAYSOCK" ] && echo '$SWAYSOCK Not set in env. Exiting.'; exit 1
+if [[ ! -v SWAYSOCK ]]; then
+	echo '$SWAYSOCK Not set in env. Exiting.'
+	exit 0
+fi
 
 # Path to genbg.gp
 genbg="/home/thurstylark/.config/sway/$(uname -n)/genbg.gp"
@@ -18,7 +21,7 @@ outh=$(swaymsg -r -t get_outputs | jq -r '.[0].current_mode.height')
 bgstash="$(mktemp tl-sway-bg.XXXX)"
 
 # Clean up any old files 
-rm ${tempfile%.*}.*
+rm ${bgstash%.*}.*
 
 # Generate the file in question
 gnuplot -c "$genbg" "$outw" "$outh" > "$bgstash"