#!/bin/sh

# Make sure the partition is mounted according to fstab
mount /mnt/gentoo 2>/dev/null

# Mount necessary directories for chroot to be possible
mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --make-rslave /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev
mount --make-rslave /mnt/gentoo/dev

# Chroot with bash shell
chroot /mnt/gentoo /bin/bash

# Unmount recursively mounted directories
umount -l /mnt/gentoo/dev{/shm,/pts,}
umount -R /mnt/gentoo

# Remount partition accordingly to fstab
# (the above umountings will unmount gentoo completely,
# which means that remounting is necessary)
mount /mnt/gentoo