0-initialsetup-prereqinstall.sh

#!/usr/bin/env bash
# Noah Bliss

ENVFILE="/etc/mortar/mortar.env" #Don't want to use $0 since we are using source against this file all over the place.
CMDLINEFILE="/etc/mortar/cmdline.conf"
WORKING_DIR='/etc/mortar/'
PRIVATE_DIR="$WORKING_DIR/private/"
if [ "$UID" -ne "0" ]; then echo "Must be run as root."; exit 1; fi
mkdir -p "$PRIVATE_DIR"
chown root:root -R "$PRIVATE_DIR"
chmod go-rwx -R "$PRIVATE_DIR"
chmod go-rwx -R "$WORKING_DIR"

# Figure out our distribuition. 
source /etc/os-release

# Install prerequisite packages. 
if [ -f "res/$ID/prereqs.sh" ]; then 
	source "res/$ID/prereqs.sh"; 
else
	echo "Could not find a prerequisite installer for $ID. Please only press enter if you want to continue at your own risk."
	read -p "Press enter to continue." asdf
fi


# Install the env file with a random key_uuid if it doesn't exist.
if ! (command -v uuidgen >/dev/null); then echo "Cannot find uuidgen tool."; exit 1; fi
if ! [ -f "$ENVFILE" ]; then echo "Generating new KEY_UUID and installing mortar.env to $WORKING_DIR"; KEY_UUID=$(uuidgen --random); sed -e "/^KEY_UUID=.*/{s//KEY_UUID=$KEY_UUID/;:a" -e '$!N;$!ba' -e '}' mortar.env > "$ENVFILE"; else echo "mortar.env already installed in $WORKING_DIR"; fi

# Install cmdline.conf
if ! [ -f "$CMDLINEFILE" ]; then echo "No CMDLINE options file found. Using currently running cmdline options from /proc/cmdline"; cat /proc/cmdline > "$CMDLINEFILE"; else echo "cmdline.conf already installed in $WORKING_DIR"; fi
echo "Make sure to update the installed mortar.env with your TPM version and ensure all the paths are correct."
if grep " splash" "$CMDLINEFILE" >/dev/null; then echo "WARNING - \"splash\" detected in "$CMDLINEFILE" this this may hide boot-time mortar output!"; fi
if grep " quiet" "$CMDLINEFILE" >/dev/null; then echo "WARNING - \"quiet\" detected in "$CMDLINEFILE" this this may hide boot-time mortar output!"; fi
if grep " rhgb" "$CMDLINEFILE" >/dev/null; then echo "WARNING - \"rhgb\" detected in "$CMDLINEFILE" this this may hide boot-time mortar output!"; fi


# Install the efi signing script.
cp bin/mortar-compilesigninstall /usr/local/sbin/mortar-compilesigninstall
if ! command -v mortar-compilesigninstall >/dev/null; then
	echo "Installed mortar-compilesigninstall to /usr/local/sbin but couldn't find it in PATH. Please update your PATH to include /usr/local/sbin"
fi