Fetch all Steam Shortcut App IDs from shortcuts.vdf using Bash.

get_all_steam_shortcut_appids.sh

#!/usr/bin/env bash

# Magic that represents 'appid' column
magic_appid="617070696400"

# Paste in your Steam UserID
steam_userid=""
shortcuts_vdf="$HOME/.steam/root/userdata/${steam_userid}/config/shortcuts.vdf"

function convert_aid {
    hex_aid="$1"
    little_endian="$( echo "$hex_aid" | tac -rs .. | tr -d '\n' )"
    echo "$((16#${little_endian}))"
}

# Get first 8 characters after magic and convert it from hex to 32bit unsigned integer
mapfile -t non_steam_appids < <(xxd -ps "$shortcuts_vdf" | grep -oP "${magic_appid}\K.{8}")
for nsi in "${non_steam_appids[@]}"; do
    convert_aid "$nsi"
done