netwifi

#!/usr/bin/env bash
# description	: simple bash script for wireless connection using wpa_supplicant
# maintainer	: mahirrudin@gmail.com
# system 	: debian stretch (9.6)

pause(){
  read -p "Press [Enter] key to continue..." EnterKey
}

register(){
	echo ""
	wpaconfdir="/etc/wpa_supplicant/conf"
	if [ ! -d $wpaconfdir ]; then sudo mkdir $wpaconfdir; fi

	read -p "Type SSID name you want to registered: " ssid
	read -p "Type $ssid password: " password

	wpaconfname=`echo "$ssid" | sed 's/ //g' | sed -e 's/\(.*\)/\L\1/'`
	wpa_passphrase "$ssid" "$password" > /tmp/$wpaconfname
	sudo mv /tmp/$wpaconfname $wpaconfdir/$wpaconfname
}

connecting(){
	echo ""
	echo "Configuration SSID availabe: "
	for ssid in `ls /etc/wpa_supplicant/conf/`; do
		echo " [*] "$ssid;
	done

	echo ""
	for dev in `ls /sys/class/net`; do
		if [ -d "/sys/class/net/$dev/wireless" ]; then
			echo -e "Detected wireless interfaces: "$dev;
		fi;
	done

	# detect if wpa_supplicant installed
	if [ ! -f "/sbin/wpa_supplicant" ]; then
	   echo -e "wpasupplicant not found, install first"
	   echo -e "sudo apt install wpasupplicant"
	   exit
	fi

	# detect if wpa_supplicant process available
	if pgrep wpa_supplicant 2>/dev/null; then
	   echo -e "Terminating wpa_supplicant old process"
	   sudo pkill wpa_supplicant 2>/dev/null
	fi


	echo ""
	read -p "Please type SSID you want to connect: " selected

	echo ""
	sudo ip link set $dev up && sudo wpa_supplicant -B -i$dev -c /etc/wpa_supplicant/conf/$selected
	echo -e "Please wait a minute, we still working"
	sudo rm /var/lib/dhcp/dhclient.*
	sudo dhclient -r $dev
	sudo dhclient $dev
}

# function to display menus
show_menus() {
	clear
	echo "~~~~~~~~~~~~~~~~~~~~~"
	echo " M A I N - M E N U"
	echo "~~~~~~~~~~~~~~~~~~~~~"
	echo "1. Register New SSID"
	echo "2. Connect to SSID"
	echo "3. Exit"
}

# read input from the keyboard and take a action
read_options(){
	local choice
	read -p "Enter choice [ 1 - 3] " choice
	case $choice in
		1) register ;;
		2) connecting ;;
		3) exit 0;;
		*) echo -e "Error..." && sleep 2
	esac
}

# Trap CTRL+C, CTRL+Z and quit singles
trap '' SIGINT SIGQUIT SIGTSTP

while true
do
	show_menus
	read_options
done