sent2pdf now ends with alt+shift+s

.config/sxhkd/sxhkdrc

@@ -69,3 +69,6 @@ alt + p
 
 XF86Launch1
     dash $SCRIPTS/toggle-select-videos-to-watch.sh
+
+alt + shift + s
+    dash $SCRIPTS/stop-sent2pdf.sh

scripts/sent2pdf.sh

@@ -1,6 +1,5 @@
 #!/bin/sh
 
-[ -z "$1" ] && exit 1
 [ -z "$2" ] && out="$HOME/out.pdf" || out="$2"
 
 folder="/tmp/sent2pdf"
@@ -10,7 +9,10 @@ i="0"
 
 killall unclutter 2> /dev/null
 
-while [ $i -ne "$1" ]
+
+wait4stop="/tmp/stop-sent2pdf"
+touch $wait4stop
+while [ -f $wait4stop ]
 do
     i="$(( $i + 1 ))"
     import "$folder/$i.png" -window current &&
@@ -18,6 +20,8 @@ do
     sleep 0.3
 done
 
+rm "$folder/$i.png"
+
 files="$(ls -v $folder/*.png | tr '\n' ' ')"
 
 convert $files "$out"