Automatically configures netctl to use wired DHCP with a chosen interface.

netctl-auto-ethernet.sh

#!/bin/bash

interfaces=$(ip link | cut -d ":" -f 1-2 | sed 'n; d')
echo -e "Available Interfaces:\n$interfaces"
read -p "Please choose an interface: " choice
if [ "$choice" -ge 1 -a "$choice" -le $(echo "$interfaces" | wc -l) ]; then
    interface=$(echo "$interfaces" | sed "${choice}q;d" | cut -d ":" -f 2 | sed 's/ //g')
    sed "s/eth0/$interface/g" /etc/netctl/examples/ethernet-dhcp > /etc/netctl/ethernet-dhcp
    echo "Now enabling the $interface interface..."
    netctl start ethernet-dhcp
    if [ $? -eq 0 ]; then
        echo "Success!"
    else
        echo "An error occurred. Check the file '/etc/netctl/ethernet-dhcp' for issues."
    fi
else
    echo "Please enter the number prefixing the desired interface."
fi

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