mount.sh

#!/bin/bash

if [ ! -f /dev/mapper/rootfs ]; then
  cryptsetup luksOpen /dev/sdb rootfs
fi

mkdir -p /mnt/gentoo

mount /dev/mapper/rootfs /mnt/gentoo
mount /dev/sda /mnt/gentoo/boot/efi

mkdir -p /mnt/gentoo/{proc,sys,dev}

mount -v -t proc none /mnt/gentoo/proc
mount -v --rbind /sys /mnt/gentoo/sys
mount -v --rbind /dev /mnt/gentoo/dev

mount -v --make-rslave /mnt/gentoo/sys
mount -v --make-rslave /mnt/gentoo/dev