mount-virt.sh

#!/bin/bash

function mountbind
{
   if ! mountpoint $LFS/$1 >/dev/null; then
     $SUDO mount --bind /$1 $LFS/$1
     echo $LFS/$1 mounted
   else
     echo $LFS/$1 already mounted
   fi
}

function mounttype
{
   if ! mountpoint $LFS/$1 >/dev/null; then
     $SUDO mount -t $2 $3 $4 $5 $LFS/$1
     echo $LFS/$1 mounted
   else
     echo $LFS/$1 already mounted
   fi
}

if [ $EUID -ne 0 ]; then
  SUDO=sudo
else
  SUDO=""
fi

if [ x$LFS == x ]; then
  echo "LFS not set"
  exit 1
fi

mountbind dev
mounttype dev/pts devpts devpts -o gid=5,mode=620
mounttype proc    proc   proc
mounttype sys     sysfs  sysfs
mounttype run     tmpfs  run
if [ -h $LFS/dev/shm ]; then
  install -v -d -m 1777 $LFS$(realpath /dev/shm)
else
  mounttype dev/shm tmpfs tmpfs -o nosuid,nodev
fi 

chroot "$LFS" /usr/bin/env -i   \
    HOME=/root                  \
    TERM="$TERM"                \
    PS1='(lfs chroot) \u:\w\$ ' \
    PATH=/usr/bin:/usr/sbin     \
    MAKEFLAGS="-j$(nproc)"      \
    TESTSUITEFLAGS="-j$(nproc)" \
    /bin/bash --login

#mountbind usr/src
#mountbind boot
#mountbind home