Option to disable wifi

src/freedombone-wifi

 WIFI_CONFIG=/etc/wpa_supplicant/wpa_supplicant.conf
 WIFI_NETWORKS_FILE=~/${PROJECT_NAME}-wifi.cfg
 NETWORKS_INTERACTIVE=
+WIFI_DISABLE=
 
 function wifi_get_psk {
     ssid=$1
 }
 
 function create_networks_interactive {
-	if [ -f $WIFI_NETWORKS_FILE ]; then
-		rm $WIFI_NETWORKS_FILE
-	fi
+    if [ -f $WIFI_NETWORKS_FILE ]; then
+        rm $WIFI_NETWORKS_FILE
+    fi
 
-	wifi_ctr=0
-	wifi_networks_done=
+    wifi_ctr=0
+    wifi_networks_done=
     while [ ! $wifi_networks_done ]
     do
-		data=$(tempfile 2>/dev/null)
-		trap "rm -f $data" 0 1 2 5 15
-		dialog --backtitle $"Freedombone Configuration" \
-			   --title $"Wifi Settings ${wifi_ctr}" \
-			   --form $"\nIf you wish to use wifi and have a Free Software compatible adapter (eg. Atheros) rather than wired ethernet then enter the details below, otherwise just select Ok:" 15 55 4 \
-			   $"SSID:" 1 1 "$WIFI_SSID" 1 16 30 30 \
-			   $"Type:" 2 1 "$WIFI_TYPE" 2 16 10 10 \
-			   $"Passphrase:" 3 1 "$WIFI_PASSPHRASE" 3 16 30 30 \
-			   2> $data
-		sel=$?
-		case $sel in
-			1) return;;
-			255) return;;
-		esac
-		WIFI_SSID=$(cat $data | sed -n 1p)
-		WIFI_TYPE=$(cat $data | sed -n 2p)
-		WIFI_PASSPHRASE=$(cat $data | sed -n 3p)
-
-		# if these fields are empty then there are no more wifi networks
-		if [ ${#WIFI_SSID} -lt 2 ]; then
-			wifi_networks_done='yes'
-			continue
-		fi	
-		if [ ${#WIFI_TYPE} -lt 2 ]; then
-			wifi_networks_done='yes'
-			continue
-		fi
-		
-		# update the wifi networks file
-		echo '' >> $WIFI_NETWORKS_FILE
-		echo "$WIFI_SSID" >> $WIFI_NETWORKS_FILE
-		echo "$WIFI_TYPE" >> $WIFI_NETWORKS_FILE
-		if [ ${#WIFI_PASSPHRASE} -gt 1 ]; then
-			echo "$WIFI_PASSPHRASE" >> $WIFI_NETWORKS_FILE
-		fi
-		wifi_ctr=$((wifi_ctr + 1))
-	done
+        data=$(tempfile 2>/dev/null)
+        trap "rm -f $data" 0 1 2 5 15
+        dialog --backtitle $"Freedombone Configuration" \
+               --title $"Wifi Settings ${wifi_ctr}" \
+               --form $"\nIf you wish to use wifi and have a Free Software compatible adapter (eg. Atheros) rather than wired ethernet then enter the details below, otherwise just select Ok:" 15 55 4 \
+               $"SSID:" 1 1 "$WIFI_SSID" 1 16 30 30 \
+               $"Type:" 2 1 "$WIFI_TYPE" 2 16 10 10 \
+               $"Passphrase:" 3 1 "$WIFI_PASSPHRASE" 3 16 30 30 \
+               2> $data
+        sel=$?
+        case $sel in
+            1) return;;
+            255) return;;
+        esac
+        WIFI_SSID=$(cat $data | sed -n 1p)
+        WIFI_TYPE=$(cat $data | sed -n 2p)
+        WIFI_PASSPHRASE=$(cat $data | sed -n 3p)
+
+        # if these fields are empty then there are no more wifi networks
+        if [ ${#WIFI_SSID} -lt 2 ]; then
+            wifi_networks_done='yes'
+            continue
+        fi  
+        if [ ${#WIFI_TYPE} -lt 2 ]; then
+            wifi_networks_done='yes'
+            continue
+        fi
+        
+        # update the wifi networks file
+        echo '' >> $WIFI_NETWORKS_FILE
+        echo "$WIFI_SSID" >> $WIFI_NETWORKS_FILE
+        echo "$WIFI_TYPE" >> $WIFI_NETWORKS_FILE
+        if [ ${#WIFI_PASSPHRASE} -gt 1 ]; then
+            echo "$WIFI_PASSPHRASE" >> $WIFI_NETWORKS_FILE
+        fi
+        wifi_ctr=$((wifi_ctr + 1))
+    done
+}
+
+function disable {
+    hotspot_off
+    echo '# interfaces(5) file used by ifup(8) and ifdown(8)' > /etc/network/interfaces
+    echo '# Include files from /etc/network/interfaces.d:' >> /etc/network/interfaces
+    echo 'source-directory /etc/network/interfaces.d' >> /etc/network/interfaces
+    systemctl restart network-manager
 }
 
 function show_help {
     echo $'     --hotspot [yes|no]            Create a hotspot'
     echo $'     --networks [filename]         File containing wifi networks'
     echo $'     --createnetworks [filename]   Create file containing wifi networks'
+    echo $'     --disable [yes/no]            Disable wifi'
     echo ''
     exit 0
 }
             ;;
         --networksinteractive)
             shift
-			NETWORKS_INTERACTIVE='yes'
+            NETWORKS_INTERACTIVE='yes'
             WIFI_NETWORKS_FILE=${1}
             ;;
+        --disable)
+            shift
+            WIFI_DISABLE=${1}
+            ;;
         *)
             # unknown option
             ;;
     shift
 done
 
+if [[ $WIFI_DISABLE == $'yes' || $WIFI_DISABLE == $'y' ]]; then
+    disable
+    exit 0
+fi
+
 if [ $NETWORKS_INTERACTIVE ]; then
-	create_networks_interactive
-	exit 0
+    create_networks_interactive
+    exit 0
 fi
 
 if [ -f $WIFI_NETWORKS_FILE ]; then
-	networks_from_file
-	exit 0
+    networks_from_file
+    exit 0
 fi
 
 if [ ! $WIFI_SSID ]; then
-	echo $'No SSID given'
-	exit 1
+    echo $'No SSID given'
+    exit 1
 fi
 
 if [[ $WIFI_HOTSPOT != 'no' ]]; then
-	hotspot_on
-	exit 0
+    hotspot_on
+    exit 0
 else
-	hotspot_off
+    hotspot_off
 fi
 
 if [[ $WIFI_TYPE != 'none' ]]; then
-	if [ ! $WIFI_PASSPHRASE ]; then
-		echo $'No wifi passphrase was given'
-		exit 2
-	fi
+    if [ ! $WIFI_PASSPHRASE ]; then
+        echo $'No wifi passphrase was given'
+        exit 2
+    fi
 fi
 
 if [[ $WIFI_TYPE == 'wpa2-psk' ]]; then
-	if [ ! -d /etc/wpa_supplicant ]; then
-		echo $'wpasupplicant package is not installed'
-		exit 3
-	fi
-	wifi_wpa2_psk "$WIFI_SSID" "$WIFI_PASSPHRASE"
-	exit 0
+    if [ ! -d /etc/wpa_supplicant ]; then
+        echo $'wpasupplicant package is not installed'
+        exit 3
+    fi
+    wifi_wpa2_psk "$WIFI_SSID" "$WIFI_PASSPHRASE"
+    exit 0
 fi
 
 if [[ $WIFI_TYPE == 'none' ]]; then
-	wifi_none "$WIFI_SSID"
-	exit 0
+    wifi_none "$WIFI_SSID"
+    exit 0
 fi
 
 exit 0