make-initrd

init (1980B)

#!/bin/sh
# Copyright 2017-2022 Haelwenn (lanodan) Monnier <contact@hacktivis.me>
# SPDX-License-Identifier: ISC
export PATH=/bin:/sbin:/usr/bin:/usr/sbin
export init=/sbin/init newroot=/newroot root=zroot/ROOT/gentoo sh=/bin/sh level=3\ -a dev_hotplug=mdev
rescueshell() {
	export PS1='rsh:$(tty | cut -c6-):$PWD # '
	if command -v setsid >/dev/null; then
		# shellcheck disable=SC2094
		setsid "$sh" -i -0<"$console" 1>"$console" 2>&1
	else
		# shellcheck disable=SC2094
		"$sh" -i 0<"$console" 1>"$console" 2>&1
	fi
}
die() {
	echo "Dropping into a rescueshell..."
	rescueshell || exec $sh -i
}
getdev() {
	blkid | grep "$1" | cut -d: -f1
}
set -v
/bin/busybox --install /usr/bin
umask 0077
mount -t proc proc /proc
mount -t sysfs sysfs /sys
if grep -q devtmpfs /proc/filesystems; then
	mount -t devtmpfs devtmpfs /dev
else
	mount -t tmpfs tmpfs /dev
fi
# shellcheck disable=SC2013
for arg in $(cat /proc/cmdline); do
	case $arg in
		rescue*)
			export rescue=1
		;;
		single)
			export level=2
		;;
		level*|init*|root*|crypt_root*|sh*|dev_hotplug*)
			# shellcheck disable=SC2163
			export "$arg"
		;;
	esac
done
root="${root/#ZFS=}"
"$dev_hotplug" -s || die
command -v "$dev_hotplug" > /proc/sys/kernel/hotplug
[ -h /dev/fd     ] || ln -fs /proc/self/fd     /dev/fd
[ -h /dev/stderr ] || ln -fs /proc/self/stderr /dev/stderr
[ -h /dev/stdin  ] || ln -fs /proc/self/stdin  /dev/stdin
[ -h /dev/stdout ] || ln -fs /proc/self/stdout /dev/stdout
: "${console:=/dev/console}"
# shellcheck disable=SC2094
exec 0<"$console" 1>"$console" 2>&1
#root=$(getdev $crypt_root)
#[ $root ] || root=/dev/sda2
#cryptsetup open $root root || die
#
#mount /dev/mapper/root $newroot || die
modprobe zfs || die
cryptsetup open /dev/sda2 cryptrpool || die
zpool import -d /dev/mapper -d /dev -N rpool || die
mount -t zfs -o rw,zfsutil "$root" "$newroot" || die
for d in /proc /sys /dev; do umount -l "$d"; done
exec switch_root "$newroot" "${init:-/sbin/init}" "$level" || die