petits-scripts-persos/wifi_chooser

#!/bin/sh
# choose a wifi signal in range and try to connect to it

verb=0
action=start

while true ; do
    case "$1" in
    	"-v")
    		verb=1
    		;;
    	"stop")
    		action=stop
    		;;
		"start") ;;
		"") break ;;
    	*)
			echo "Invalid parameter '$1'"
    		break;;
    esac
    shift
done
# Remaining args are garbage
if [ "$#" -ne 0 ] ; then
	echo "Usage: $0 [-v] [start|stop]"
	echo "-v verbose output"
	echo "start or stop the wifi"
	exit -1
fi


title="Wifi Selector"
id=""
notify () {
	if [ -z "$id" ] ; then
		id="$(dunstify -p "$title" "$@")"
	else
		dunstify -r "$id" "$title" "$@"
	fi
}

# Stop the wifi if asked
if [ "$action" == "stop" ] ; then
	nmcli radio wifi off
	notify "Wifi stopped"
	exit "$?"
fi

# Else, start it if needed
if ( nmcli radio wifi | grep disabled > /dev/null ) ; then
 	notify "Turning on"
 	nmcli radio wifi on 
 	sleep 2
fi

notify "Scanning networks in range..."
nmcli device wifi rescan

ssid="$(nmcli -f IN-USE,SSID,BARS d wifi list | dmenu -l 8)" 
ssid="$(echo "${ssid:2:-5}" | sed 's/^ *//g' | sed 's/ *$//g')"

# We get a clean version of SSIDs. It is a fix to connect to wifis that begin or end with spaces
ssid="$(nmcli -f SSID -m multiline -t -c no d wifi list | grep -F "$ssid")"
ssid="${ssid:5}"

[ $verb -gt 0 ] && echo "ssid: $ssid"
[ -z "$ssid" ] && notify "No SSID selected" && exit 1

notify "Connecting to $ssid"
out="$(nmcli d wifi connect "$ssid" 2>&1 | grep -i error)"
res="$?"
[ -z "$out" ] && notify "Connected :)" || notify "Error connecting :(\n$out"