Override the linux library responsible for the host file too allow for alternate locations

host_override.sh

#!/bin/bash

OVERRIDE_PATH="./lib_overrides"

COMMAND="${1}"; shift
ARGUMENTS="$@"

mkdir -p ${OVERRIDE_PATH}

# Ensure the host file exists at our new location
if [ ! -f /tmp/hosts ]; then
  cp /etc/hosts /tmp/hosts
fi

for LIB in $(find / -name libnss_files.so.2 -print 2> /dev/null); do
  # Generally there is both a 32bit and 64bit version, differentiate them with
  # their parent dir.
  DIR=$(basename $(dirname ${LIB}));
  NEW_LIB_PATH="${OVERRIDE_PATH}/${DIR}/$(basename ${LIB})"

  if [ ! -f ${NEW_LIB_PATH} ]; then
    mkdir -p $(dirname ${NEW_LIB_PATH})
    cp ${LIB} ${NEW_LIB_PATH}
    sed -ie 's:/etc/hosts:/tmp/hosts:g' ${NEW_LIB_PATH}
  fi

  LD_LIBRARY_PATH="${OVERRIDE_PATH}/${DIR}:${LD_LIBRARY_PATH}"
done

echo ${LD_LIBRARY_PATH}
export LD_LIBRARY_PATH
${COMMAND} ${ARGUMENTS}