wificonnect

#!/bin/bash

#script to list available SSID and mod wpa-supplicant
#file to connect to new wifi hotspot
#this script works in conjuction with autohotspot
#http://www.raspberryconnect.com/network/item/330-raspberry-pi-auto-wifi-hotspot-switch-internet
#km4ack 20190401
#edited 20200221

mkdir -p $HOME/temp
TEMPFILE=$HOME/temp/tempwifi
HS=$(systemctl is-active autohotspot)
if [ $HS = 'active' ]
then
HSS=ACTIVE
else
HSS=INACTIVE
fi

ADD () {
# Generate List of Available SSIDs
SSID_LIST () {
LIST=$(iw dev "wlan0" scan ap-force | egrep "^BSS|SSID:" | grep SSID: | sed 's/SSID://' | awk '{ print $1 }' )
clear;echo;echo
echo "These SSID's are available"
echo
echo "$LIST" | sed '/^$/d'
#ask user about hotspots
echo
echo "1 to refresh the list, 2 to exit or"
echo "Enter name of SSID would you like add?"
read SSID
if [ $SSID == "1" ]
then
clear;echo;echo
echo "Scanning for WiFi again...please wait"
SSID_LIST
elif [ $SSID == "2" ]
then
echo "Goodbye"
exit
fi
}

#print list on screen
clear;echo;echo
echo "Scanning for Wifi.....please wait"
SSID_LIST

#get SSID password
echo
echo "What is the password for the hotspot?"
read PASS

#verify you want to add the hotspot
echo
echo "SSID = "$SSID
echo "Password = "$PASS
echo "REMEMBER THIS IS CASE SENSITIVE"
echo "Is this correct? y/n"
read ANSWER

#make the change to wpa_supplicant.conf
if [ $ANSWER == "y" ] || [ $ANSWER == "Y" ]
then
cat > $TEMPFILE <<EOF
network={
ssid="$SSID"
psk="$PASS"
key_mgmt=WPA-PSK
}
EOF
cat $TEMPFILE | tee -a /etc/wpa_supplicant/wpa_supplicant.conf
rm $TEMPFILE
	if [ $HSS = 'ACTIVE' ]
	then
	echo "attempting to connect to new wifi"
	/usr/bin/autohotspotN
	elif [ $HSS = 'INACTIVE' ]
	then
	killall wpa_supplicant
	sleep 1
	wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf
	sleep 2
	fi
else
clear;echo;echo;
echo "Scanning for WiFi.....please wait"
SSID_LIST
fi
}

SUBTRACT () {
SSID=$(cat /etc/wpa_supplicant/wpa_supplicant.conf | grep ssid= | sed 's/ssid="//' | sed 's/"//')
clear
echo;echo
echo "List of currently known SSID's"
echo
echo "$SSID"
echo;echo
read -p "Name of SSID to remove or exit to quit " RSSID

if [ "$RSSID" = 'exit' ]
then
exit 0
fi

EXIST=$(echo $SSID | grep "$RSSID")
if [ -z "$EXIST" ]
then
cat <<EOF
That wifi doesn't exist on the pi.
Please check spelling and try again.
Remember that your answer is case
sensitive
EOF
sleep 5
exit 1
fi

file="/etc/wpa_supplicant/wpa_supplicant.conf"
foo="$(cat "$file" | awk -v RSSID="$RSSID" '$0 ~ RSSID { flag=1 }; flag==0 { print $0 }; /network={/ { flag=0 }' )"
if echo -e "$foo" | tail -1 | grep -q 'network={'; then
   foo=$(echo -e "$foo" | head -n -1)
fi
#cat $foo | tee /etc/wpa_supplicant/wpa_supplicant.conf
echo -e "$foo" > "$file"
echo
echo $RSSID" has been removed"
sleep 2
}

CHOICES() {
clear;echo;echo
echo "Manage SSID's on the Pi"
echo;echo
echo "1 to remove WiFi"
echo "2 to add WiFi"
echo "3 to exit"
read ANS

if [ $ANS = '1' ]
then
SUBTRACT
elif [ $ANS = '2' ]
then
ADD
elif [ $ANS = '3' ]
then
exit 0
else
echo "No such option. Try again"
sleep 1
CHOICES
fi
}

CHOICES