File entrypoint.sh of Package opensuse-nsd-image

#!/bin/sh
set -e

DEBUG=${DEBUG:-"0"}

[ "${DEBUG}" = "1" ] && set -x

DATA_DIR=/data
NSD_USER=_nsd

create_bind_data_dir() {
  mkdir -p ${DATA_DIR}

  # populate default bind configuration if it does not exist
  if test ! -d ${DATA_DIR}/etc; then
      mkdir -p ${DATA_DIR}/etc/zones
      chmod 0750 ${DATA_DIR}/etc
      chmod 0750 ${DATA_DIR}/etc/zones
      mv /etc/nsd/nsd.conf.sample ${DATA_DIR}/etc/
      sed -i -e 's|"/etc/nsd/|"${DATA_DIR}/etc/nsd/|g' ${DATA_DIR}/etc/nsd.conf.sample
      chown --recursive _nsd:_nsd ${DATA_DIR}/etc
  fi
  rm -rf /etc/nsd/zones
  ln -sf ${DATA_DIR}/etc/nsd.conf /etc/nsd/nsd.conf
  ln -sf ${DATA_DIR}/etc/nsd/zones /etc/nsd/zones
  chown -R ${NSD_USER}:${NSD_USER} ${DATA_DIR}/etc

  if test ! -d ${DATA_DIR}/lib; then
    mv /var/lib/nsd ${DATA_DIR}/lib
    chown -R ${NSD_USER}:${NSD_USER} ${DATA_DIR}/lib
  fi
  rm -rf /var/lib/nsd
  ln -sf ${DATA_DIR}/lib /var/lib/nsd
}

create_pid_dir() {
  mkdir -m 0775 -p /var/run/nsd
  chown ${NSD_USER}:${NSD_USER} /var/run/nsd
}

create_pid_dir
create_bind_data_dir

# allow arguments to be passed to nsd
if test "${1:0:1}" = '-'; then
  EXTRA_ARGS="$@"
  set --
elif test "${1}" = "nsd" || test "${1}" = "/usr/sbin/nsd"; then
  shift 1
  EXTRA_ARGS="${@}"
  set --
fi

# default behaviour is to launch nsd
if test -z ${1}; then
  echo "Starting nsd..."
  exec /usr/sbin/nsd -u ${NSD_USER} -t ${DATA_DIR} -d ${EXTRA_ARGS}
else
  exec "$@"
fi