wpa_add script
================================================================================

I have this script named `wpa_add`, which I use to easily add new WiFi when I
am outside, possibly in a cafe. I have written this script because I don't like
the way my girlfriend looks at me while thinking that I am an absolute moron for
not using Windows 10, and the entirety of Linux is a circlejerk. It is only
natural that she thinks this way. I use my own distribution that doesn't have
things like `dbus`, or `NetworkManager`, or one of those common desktop
environments. You could install it by creating a simple package, but I am happy
to not have any of those in my system.

This script uses wpa-supplicant to add a new network and reconfigure. It uses
dmenu for input, however you could replace dmenu calls with some command line
prompts. I am doing the following assumptions:
- You can manipulate `wpa_supplicant` without root access.
- The configuration is on `/etc/wpa_supplicant.conf`.
- You can edit `/etc/wpa/supplicant.conf`.

If you want to ensure the above just do the following (as root):

```sh
# Add yourself to the wheel group if you aren't already.
adduser user wheel

# Change the ownership of /etc/wpa_supplicant.conf
chown root:wheel /etc/wpa_supplicant.conf

# Make sure the configuration can be edited by the wheel group.
chmod 664 /etc/wpa_supplicant.conf
```

Your `wpa_supplicant` configuration must include the following line (or something similar):

```plaintext
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
```


Here is the script

```sh
#!/bin/sh
# Script to add wpa_supplicant networks through dmenu

if [ "$1" ]; then
    name=$1
else
    name=$(dmenu -p "Please enter network name, leave empty if you want to search" <&-)
fi

[ "$name" ] || {
    wpa_cli scan
    name=$(
    wpa_cli scan_results | sed 1,2d | while read -r _ _ _ _ ssid _; do
        # Hidden wifi are not to be returned
        [ "$ssid" ] || continue
        echo "$ssid"
    done | sort -u | dmenu -l 10 -p "Please choose WiFi")
    [ "$name" ] || exit 1
}

pass=$(dmenu -P -p "Please enter your password, leave empty if the network has open access.")

if [ "$pass" ]; then
    wpa_passphrase "$name" <<EOF>> /etc/wpa_supplicant.conf
$pass
EOF
else
    printf 'network={\n\tssid="%s"\n\tkey_mgmt=NONE\n\tpriority=-999\n}\n' "$name" >> /etc/wpa_supplicant.conf
fi

wpa_cli reconfigure
```


As I have said, you could do something similar in a command-line-only tool as
well. This one uses `fzf` on WiFi selection.

```sh
#!/bin/sh -e

stty="$(stty -g)"
trap "stty $stty" EXIT INT TERM HUP

if [ "$1" ]; then
    name=$1
else
    printf 'Network Name, leave empty if you want to search: '
    read -r name
fi

[ "$name" ] || {
    wpa_cli scan >/dev/null
    name=$(
    wpa_cli scan_results | sed 1,2d | while read -r _ _ _ _ ssid _; do
        # Hidden wifi are not to be returned
        [ "$ssid" ] || continue
        echo "$ssid"
    done | sort -u | fzf --prompt "Please choose WiFi: ")
}

[ "$name" ] || exit 1

stty -echo
printf 'Please enter your password, leave empty if the network has open access.\nPassword: '
read -r pass

if [ "$pass" ]; then
    wpa_passphrase "$name" <<EOF>> /etc/wpa_supplicant.conf
$pass
EOF
else
    printf 'network={\n\tssid="%s"\n\tkey_mgmt=NONE\n\tpriority=-999\n}\n' "$name" >> /etc/wpa_supplicant.conf
fi

wpa_cli reconfigure
```

These scripts can be found as a gist [here](https://git.io/JULL6)