Prevent globbing and word splitting

.scripts/panel/battery.sh

@@ -2,8 +2,8 @@
 
 BAT_INFO=${BLOCK_INSTANCE:-"$(acpi -b | grep ': [^Unknown]')"}
 
-CAPACITY=$(echo $BAT_INFO | awk '{ print int($4) }')
+CAPACITY=$(echo "$BAT_INFO" | awk '{ print int($4) }')
-TIME="$(echo $BAT_INFO | awk '{ print substr($5, 0, length($5) - 3) }')"
+TIME="$(echo "$BAT_INFO" | awk '{ print substr($5, 0, length($5) - 3) }')"
 CHARACTER=":"
 
 if [ "$TIME" != "" ] && [ "${TIME#*$CHARACTER}" != "$TIME" ]; then
@@ -13,7 +13,7 @@ else
 fi
 
 COLOR="-"
-if [ "$(echo $BAT_INFO | awk '{ print $6 }')" = "remaining" ]; then
+if [ "$(echo "$BAT_INFO" | awk '{ print $6 }')" = "remaining" ]; then
 	if [ "$CAPACITY" -ge "80" ]; then
 		ICON=""
 	elif [ "$CAPACITY" -ge "60" ]; then

.scripts/panel/wifi.sh

@@ -4,8 +4,8 @@ ICON=""
 WIRELESS="${1:-wlan0}"
 
 if [ "$NOTIFY" = "1" ]; then
-	SSID="$(iw dev $WIRELESS link | awk '/SSID/ { print $2 }')"
+	SSID="$(iw dev "$WIRELESS" link | awk '/SSID/ { print $2 }')"
-	IP="$(ip a show $WIRELESS \
+	IP="$(ip a show "$WIRELESS" \
 		| awk '/inet / { print substr($2, 0, length($2) - 3) }')"
 
 	notify-send -r 3 "Wifi" "\
@@ -14,13 +14,13 @@ SSID:      $SSID
 IP:        $IP"
 else
 	COLOR="-"
-	if [ ! -d /sys/class/net/${WIRELESS}/wireless ] ||
+	if [ ! -d /sys/class/net/"$WIRELESS"/wireless ] ||
-		[ "$(cat /sys/class/net/$WIRELESS/operstate)" = 'down' ]; then
+		[ "$(cat /sys/class/net/"$WIRELESS"/operstate)" = 'down' ]; then
 
 		COLOR="$COLOR7"
 		DISPLAY="$ICON"
 	else
-		QUALITY=$(grep $WIRELESS /proc/net/wireless | \
+		QUALITY=$(grep "$WIRELESS" /proc/net/wireless | \
 			awk '{ print int($3 * 100 / 70) }')
 
 		COLOR="$COLOR15"