#!/bin/bash

set -e

system_fips=/etc/system-fips
dracut_cfg_d=/etc/dracut.conf.d
dracut_cfg=$dracut_cfg_d/40-fips.conf

is_ostree_system=0
if test -f /run/ostree-booted; then
    is_ostree_system=1
fi

if test x"$1" !=  x--complete ; then
	echo "Complete the instalation of FIPS modules."
	echo "usage: $0 --complete"
	exit 2
fi

if [ $(id -u) != 0 ]; then
	echo "You must be root to run $(basename $0)"
	exit 1
fi

umask 022

trap "rm -f $system_fips $dracut_cfg" ERR

echo "# FIPS module installation complete" >$system_fips

if test ! -d $dracut_cfg_d -o ! -d /boot -o "$is_ostree_system" = 1 ; then
	# No dracut configuration or boot directory present, do not try to modify it.
	# Also, on OSTree systems, we currently rely on the initrd already including
	# the FIPS module.
	exit 0
fi

cat >$dracut_cfg <<EOF
# turn on fips module

add_dracutmodules+=" fips "
EOF

echo "Kernel initramdisks are being regenerated. This might take some time."

dracut -f --regenerate-all

# This is supposed to be a fast and safe operation that's always good to run.
# Regenerating an initrd and skipping it might render the system unbootable
# (RHBZ#2013195).
if test x"$(uname -m)" = xs390x; then
	if command -v zipl >/dev/null; then
		zipl >/dev/null 2>&1
	else
		echo '`zipl` execution has been skipped: `zipl` not found.'
	fi
fi