#!/bin/sh
# This is an IPFire helper script for GRUB to enable the serial console
# on AWS instances at the time of the first boost

set -e

# Do nothing if first boot isn't enabled
if [ "${GRUB_FIRST_BOOT}" != "true" ]; then
	exit 0
fi

. "${pkgdatadir}/grub-mkconfig_lib"

if [ -z "${KERNEL_RELEASE}" ]; then
	KERNEL_RELEASE="$(uname -r)"
fi

if [ -z "${boot_device_id}" ]; then
	boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"
fi

cat <<EOF
# Read the system manufacturer string from the BIOS
smbios --type 1 --get-string 4 --set system_manufacturer

# Read the chassis asset tag
smbios --type 3 --get-string 8 --set chassis_asset_tag

# Are we on Amazon EC2?
if [ "\$system_manufacturer" = "Amazon EC2" ]; then
	next_entry=gnulinux-${KERNEL_RELEASE}-serial-${boot_device_id}
fi

# Are we on Oracle Cloud?
if [ "\$chassis_asset_tag" = "OracleCloud.com" ]; then
	next_entry=gnulinux-${KERNEL_RELEASE}-serial-${boot_device_id}
fi
EOF