dmenumount fix + improvements (#602)

* Remove misleading character escape.

Everything is in single quotes, so shell will escape it correctly
without backslashes. Fixes #440.

* Remove lsblk type restriction.

* Make it possible to cancel with ESC in dmenu.

Up to now if you pressed ESC to cancel the program would just continue
with incorrect data.

.local/bin/dmenumount

@@ -7,18 +7,20 @@
 
 getmount() { \
 	[ -z "$chosen" ] && exit 1
-	mp="$(find $1 2>/dev/null | dmenu -i -p "Type in mount point.")"
+        # shellcheck disable=SC2086
+	mp="$(find $1 2>/dev/null | dmenu -i -p "Type in mount point.")" || exit 1
 	[ "$mp" = "" ] && exit 1
 	if [ ! -d "$mp" ]; then
-		mkdiryn=$(printf "No\\nYes" | dmenu -i -p "$mp does not exist. Create it?")
+		mkdiryn=$(printf "No\\nYes" | dmenu -i -p "$mp does not exist. Create it?") || exit 1
 		[ "$mkdiryn" = "Yes" ] && (mkdir -p "$mp" || sudo -A mkdir -p "$mp")
 	fi
 	}
 
 mountusb() { \
-	chosen="$(echo "$usbdrives" | dmenu -i -p "Mount which drive?" | awk '{print $1}')"
+	chosen="$(echo "$usbdrives" | dmenu -i -p "Mount which drive?")" || exit 1
+	chosen="$(echo "$chosen" | awk '{print $1}')"
 	sudo -A mount "$chosen" 2>/dev/null && notify-send "💻 USB mounting" "$chosen mounted." && exit 0
-	alreadymounted=$(lsblk -nrpo "name,type,mountpoint" | awk '$2=="part"&&$3!~/\/boot|\/home$|SWAP/&&length($3)>1{printf "-not \\( -path *%s -prune \\) \\ \n",$3}')
+	alreadymounted=$(lsblk -nrpo "name,type,mountpoint" | awk '$3!~/\/boot|\/home$|SWAP/&&length($3)>1{printf "-not ( -path *%s -prune ) ",$3}')
 	getmount "/mnt /media /mount /home -maxdepth 5 -type d $alreadymounted"
 	partitiontype="$(lsblk -no "fstype" "$chosen")"
 	case "$partitiontype" in
@@ -29,23 +31,25 @@ mountusb() { \
 	}
 
 mountandroid() { \
-	chosen=$(echo "$anddrives" | dmenu -i -p "Which Android device?" | cut -d : -f 1)
+	chosen="$(echo "$anddrives" | dmenu -i -p "Which Android device?")" || exit 1
+	chosen="$(echo "$chosen" | cut -d : -f 1)"
 	getmount "$HOME -maxdepth 3 -type d"
         simple-mtpfs --device "$chosen" "$mp"
-	echo "OK" | dmenu -i -p "Tap Allow on your phone if it asks for permission and then press enter"
+	echo "OK" | dmenu -i -p "Tap Allow on your phone if it asks for permission and then press enter" || exit 1
 	simple-mtpfs --device "$chosen" "$mp"
 	notify-send "🤖 Android Mounting" "Android device mounted to $mp."
 	}
 
 asktype() { \
-	case $(printf "USB\\nAndroid" | dmenu -i -p "Mount a USB drive or Android device?") in
+	choice="$(printf "USB\\nAndroid" | dmenu -i -p "Mount a USB drive or Android device?")" || exit 1
+	case $choice in
 		USB) mountusb ;;
 		Android) mountandroid ;;
 	esac
 	}
 
 anddrives=$(simple-mtpfs -l 2>/dev/null)
-usbdrives="$(lsblk -rpo "name,type,size,mountpoint" | awk '$2=="part"&&$4==""{printf "%s (%s)\n",$1,$3}')"
+usbdrives="$(lsblk -rpo "name,type,size,mountpoint" | awk '$4==""{printf "%s (%s)\n",$1,$3}')"
 
 if [ -z "$usbdrives" ]; then
 	[ -z "$anddrives" ] && echo "No USB drive or Android device detected" && exit

.local/bin/dmenuumount

@@ -6,25 +6,27 @@
 
 unmountusb() {
 	[ -z "$drives" ] && exit
-	chosen=$(echo "$drives" | dmenu -i -p "Unmount which drive?" | awk '{print $1}')
+	chosen="$(echo "$drives" | dmenu -i -p "Unmount which drive?")" || exit 1
+	chosen="$(echo "$chosen" | awk '{print $1}')"
 	[ -z "$chosen" ] && exit
 	sudo -A umount "$chosen" && notify-send "💻 USB unmounting" "$chosen unmounted."
 	}
 
 unmountandroid() { \
-	chosen=$(awk '/simple-mtpfs/ {print $2}' /etc/mtab | dmenu -i -p "Unmount which device?")
+	chosen="$(awk '/simple-mtpfs/ {print $2}' /etc/mtab | dmenu -i -p "Unmount which device?")" || exit 1
 	[ -z "$chosen" ] && exit
 	sudo -A umount -l "$chosen" && notify-send "🤖 Android unmounting" "$chosen unmounted."
 	}
 
 asktype() { \
-	case "$(printf "USB\\nAndroid" | dmenu -i -p "Unmount a USB drive or Android device?")" in
+	choice="$(printf "USB\\nAndroid" | dmenu -i -p "Unmount a USB drive or Android device?")" || exit 1
+	case "$choice" in
 		USB) unmountusb ;;
 		Android) unmountandroid ;;
 	esac
 	}
 
-drives=$(lsblk -nrpo "name,type,size,mountpoint" | awk '$2=="part"&&$4!~/\/boot|\/home$|SWAP/&&length($4)>1{printf "%s (%s)\n",$4,$3}')
+drives=$(lsblk -nrpo "name,type,size,mountpoint" | awk '$4!~/\/boot|\/home$|SWAP/&&length($4)>1{printf "%s (%s)\n",$4,$3}')
 
 if ! grep simple-mtpfs /etc/mtab; then
 	[ -z "$drives" ] && echo "No drives to unmount." &&  exit