Script to generate real SMBIOS for QEMU

generate_smbios.sh

#!/bin/bash

# See https://www.qemu.org/docs/master/system/invocation.html?highlight=smbios#hxtool-4
declare -A smb0
declare -A smb1
declare -A smb2
declare -A smb3
declare -A smb4
declare -A smb11
declare -A smb17

function addDmi () {
    declare -n smb="smb$1"
    local dmiFle="/sys/class/dmi/id/$3"
    if [[ -f "$dmiFle" ]]; then
        smb[$2]=$(cat "$dmiFle")
        return
    fi

    local dmiDec=$(dmidecode --string "$3")
    if [[ $? -eq 0 ]]; then
        smb[$2]="$dmiDec"
    else
        smb[$2]="Default string"
    fi
}

function addDmiField () {
    declare -n smb="smb$1"
    local dmiDec=$(dmidecode -t $1 | grep -E "\s$3:" | head -n1 | grep -E -o ':\s+.*$' | cut -c3-)
    smb[$2]="$dmiDec"
}

function addStr () {
    declare -n smb="smb$1"
    smb[$2]="$3"
}

function printSmbType () {
    declare -n smb="smb$1"

    echo -n "-smbios 'type=$1"
    for key in "${!smb[@]}"; do
        local val="${smb[$key]/,/,,}"
        if [[ -z "$val" ]]; then val="''"; fi
        echo -n ",$key=$val"
    done
    echo -n "' "
}


addDmi 0 vendor bios_vendor
addDmi 0 version bios_version
addDmi 0 date bios_date
addDmi 0 release bios_release
addStr 0 uefi on

addDmi 1 manufacturer sys_vendor
addDmi 1 product product_name
addDmi 1 version product_version
addDmi 1 serial product_serial
addDmi 1 uuid product_uuid
addDmi 1 sku product_sku
addDmi 1 family product_family

addDmi 2 manufacturer board_vendor
addDmi 2 product board_name
addDmi 2 version board_version
addDmi 2 serial board_serial
addDmi 2 asset board_asset_tag
addDmiField 2 location 'Location In Chassis'

addDmi 3 manufacturer chassis_vendor
addDmi 3 version chassis_version
addDmi 3 serial chassis_serial
addDmi 3 asset chassis_asset_tag
addDmiField 3 sku 'SKU Number'

addDmiField 4 sock_pfx 'Socket Designation'
addDmi 4 manufacturer processor-manufacturer
addDmi 4 version processor-version
addDmiField 4 serial 'Serial Number'
addDmiField 4 asset 'Asset Tag'
addDmi 4 part processor-family

addStr 11 value 'Default string'

addStr 17 loc_pfx 'DIMM 0'
addStr 17 bank 'Bank 0'
addDmiField 17 manufacturer 'Manufacturer'
addDmiField 17 serial 'Serial Number'
addDmiField 17 asset 'Asset Tag'
addDmiField 17 part 'Part Number'
addStr 17 speed 3200

printSmbType 0
printSmbType 1
printSmbType 2
printSmbType 3
printSmbType 4
printSmbType 11
printSmbType 17

echo ''