Map GPTID to disk / device identifier (e.g. ada0)

gptid_to_deviceid.sh

#!/bin/bash

# Create associative mapping array
declare -A GPTID_TO_DISKID
while read -r row; do
    gptid=$(echo "$row" | cut -d ' ' -f1)
    diskid=$(echo "$row" | cut -d ' ' -f3 | rev | cut -d 'p' -f2 | rev)

    if [[ "$gptid" = "gptid"* ]]; then
        GPTID_TO_DISKID[$gptid]=$diskid
    fi
done < <(glabel status | tail -n +2 | tr -s ' ')

# Verbose logging
echo "Detected GPTID to disk identifier mappings:"
for gptid in "${!GPTID_TO_DISKID[@]}"; do
    echo "-> [$gptid]=${GPTID_TO_DISKID[$gptid]}"
done