Display OpenVPN status more prettily

openvpn_status.sh

#!/bin/bash

LOG_FILE="/var/log/openvpn/status.log"

if [ ! -f "$LOG_FILE" ]; then
    echo "Log file not found: $LOG_FILE"
    exit 1
fi

declare -A tunnel_ips

in_routing=0
while IFS=, read -r virtual_ip common_name real_ip last_ref; do
    if [[ "$virtual_ip" == "ROUTING TABLE" ]]; then
        in_routing=1
        continue
    fi
    if [[ "$virtual_ip" == "GLOBAL STATS" ]]; then
        break
    fi
    if [[ "$virtual_ip" == "Virtual Address" ]]; then
        continue
    fi
    if (( in_routing )); then
        tunnel_ips["$common_name"]="$virtual_ip"
    fi
done < "$LOG_FILE"

printf "%-20s %-15s %-21s %-10s %-10s %-20s\n" "Client" "Tunnel IP" "IP:Port" "Recv (B)" "Sent (B)" "Connected Since"
echo "------------------------------------------------------------------------------------------------------------------"

temp_file=$(mktemp)

in_clients=0
while IFS=, read -r name ip recv sent since; do
    if [[ "$name" == "OpenVPN CLIENT LIST" ]]; then
        in_clients=1
        continue
    fi
    if [[ "$name" == "ROUTING TABLE" ]]; then
        break
    fi
    if [[ "$name" == "Common Name" || "$name" == "Updated" ]]; then
        continue
    fi
    if (( in_clients )); then
        tunnel_ip="${tunnel_ips[$name]}"
        printf "%-20s %-15s %-21s %-10s %-10s %-20s\n" "$name" "$tunnel_ip" "$ip" "$recv" "$sent" "$since" >> "$temp_file"
    fi
done < "$LOG_FILE"

sort "$temp_file"
rm -f "$temp_file"