#!/usr/bin/env bash

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

MYNAME="${BASH_SOURCE-$0}"

function hadoop_usage
{
  hadoop_add_option "--buildpaths" "attempt to add class files from build tree"
  hadoop_add_option "--daemon (start|status|stop)" "operate on a daemon"
  hadoop_add_option "--hostnames list[,of,host,names]" "hosts to use in slave mode"
  hadoop_add_option "--loglevel level" "set the log4j level for this command"
  hadoop_add_option "--hosts filename" "list of hosts to use in slave mode"
  hadoop_add_option "--slaves" "turn on slave mode"

  hadoop_add_subcommand "balancer" "run a cluster balancing utility"
  hadoop_add_subcommand "cacheadmin" "configure the HDFS cache"
  hadoop_add_subcommand "classpath" "prints the class path needed to get the hadoop jar and the required libraries"
  hadoop_add_subcommand "crypto" "configure HDFS encryption zones"
  hadoop_add_subcommand "datanode" "run a DFS datanode"
  hadoop_add_subcommand "debug" "run a Debug Admin to execute HDFS debug commands"
  hadoop_add_subcommand "dfs" "run a filesystem command on the file system"
  hadoop_add_subcommand "dfsadmin" "run a DFS admin client"
  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
  hadoop_add_subcommand "erasurecode" "run a HDFS ErasureCoding CLI"
  hadoop_add_subcommand "fetchdt" "fetch a delegation token from the NameNode"
  hadoop_add_subcommand "fsck" "run a DFS filesystem checking utility"
  hadoop_add_subcommand "getconf" "get config values from configuration"
  hadoop_add_subcommand "groups" "get the groups which users belong to"
  hadoop_add_subcommand "haadmin" "run a DFS HA admin client"
  hadoop_add_subcommand "jmxget" "get JMX exported values from NameNode or DataNode."
  hadoop_add_subcommand "journalnode" "run the DFS journalnode"
  hadoop_add_subcommand "lsSnapshottableDir" "list all snapshottable dirs owned by the current user"
  hadoop_add_subcommand "mover" "run a utility to move block replicas across storage types"
  hadoop_add_subcommand "namenode" "run the DFS namenode"
  hadoop_add_subcommand "nfs3" "run an NFS version 3 gateway"
  hadoop_add_subcommand "oev" "apply the offline edits viewer to an edits file"
  hadoop_add_subcommand "oiv" "apply the offline fsimage viewer to an fsimage"
  hadoop_add_subcommand "oiv_legacy" "apply the offline fsimage viewer to a legacy fsimage"
  hadoop_add_subcommand "portmap" "run a portmap service"
  hadoop_add_subcommand "secondarynamenode" "run the DFS secondary namenode"
  hadoop_add_subcommand "snapshotDiff" "diff two snapshots of a directory or diff the current directory contents with a snapshot"
  hadoop_add_subcommand "storagepolicies" "list/get/set block storage policies"
  hadoop_add_subcommand "version" "print the version"
  hadoop_add_subcommand "zkfc" "run the ZK Failover Controller daemon"
  hadoop_generate_usage "${MYNAME}" false
}

# let's locate libexec...
if [[ -n "${HADOOP_PREFIX}" ]]; then
  HADOOP_DEFAULT_LIBEXEC_DIR="${HADOOP_PREFIX}/libexec"
else
  bin=$(cd -P -- "$(dirname -- "${MYNAME}")" >/dev/null && pwd -P)
  HADOOP_DEFAULT_LIBEXEC_DIR="${bin}/../libexec"
fi

HADOOP_LIBEXEC_DIR="${HADOOP_LIBEXEC_DIR:-$HADOOP_DEFAULT_LIBEXEC_DIR}"
# shellcheck disable=SC2034
HADOOP_NEW_CONFIG=true
if [[ -f "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh" ]]; then
  . "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
else
  echo "ERROR: Cannot execute ${HADOOP_LIBEXEC_DIR}/hdfs-config.sh." 2>&1
  exit 1
fi

if [[ $# = 0 ]]; then
  hadoop_exit_with_usage 1
fi

COMMAND=$1
shift

case ${COMMAND} in
  balancer)
    supportdaemonization="true"
    CLASS=org.apache.hadoop.hdfs.server.balancer.Balancer
    hadoop_debug "Appending HADOOP_BALANCER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_BALANCER_OPTS}"
  ;;
  cacheadmin)
    CLASS=org.apache.hadoop.hdfs.tools.CacheAdmin
  ;;
  classpath)
    hadoop_do_classpath_subcommand CLASS "$@"
  ;;
  crypto)
    CLASS=org.apache.hadoop.hdfs.tools.CryptoAdmin
  ;;
  datanode)
    supportdaemonization="true"
    # Determine if we're starting a secure datanode, and
    # if so, redefine appropriate variables
    if [[ -n "${HADOOP_SECURE_DN_USER}" ]]; then
      secure_service="true"
      secure_user="${HADOOP_SECURE_DN_USER}"

      # backward compatiblity
      HADOOP_SECURE_PID_DIR="${HADOOP_SECURE_PID_DIR:-$HADOOP_SECURE_DN_PID_DIR}"
      HADOOP_SECURE_LOG_DIR="${HADOOP_SECURE_LOG_DIR:-$HADOOP_SECURE_DN_LOG_DIR}"

      hadoop_debug "Appending HADOOP_DATANODE_OPTS onto HADOOP_OPTS"
      hadoop_debug "Appending HADOOP_DN_SECURE_EXTRA_OPTS onto HADOOP_OPTS"
      HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_DATANODE_OPTS} ${HADOOP_DN_SECURE_EXTRA_OPTS}"
      CLASS="org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter"
    else
      hadoop_debug "Appending HADOOP_DATANODE_OPTS onto HADOOP_OPTS"
      HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_DATANODE_OPTS}"
      CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode'
    fi
  ;;
  debug)
    CLASS='org.apache.hadoop.hdfs.tools.DebugAdmin'
  ;;
  dfs)
    CLASS=org.apache.hadoop.fs.FsShell
    hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
  ;;
  dfsadmin)
    CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin
    hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
  ;;
  envvars)
    echo "JAVA_HOME='${JAVA_HOME}'"
    echo "HADOOP_HDFS_HOME='${HADOOP_HDFS_HOME}'"
    echo "HDFS_DIR='${HDFS_DIR}'"
    echo "HDFS_LIB_JARS_DIR='${HDFS_LIB_JARS_DIR}'"
    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
    exit 0
  ;;
  erasurecode)
    CLASS=org.apache.hadoop.hdfs.tools.erasurecode.ECCli
    hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
  ;;
  fetchdt)
    CLASS=org.apache.hadoop.hdfs.tools.DelegationTokenFetcher
  ;;
  fsck)
    CLASS=org.apache.hadoop.hdfs.tools.DFSck
    hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
  ;;
  getconf)
    CLASS=org.apache.hadoop.hdfs.tools.GetConf
  ;;
  groups)
    CLASS=org.apache.hadoop.hdfs.tools.GetGroups
  ;;
  haadmin)
    CLASS=org.apache.hadoop.hdfs.tools.DFSHAAdmin
    hadoop_add_to_classpath_toolspath
    hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
  ;;
  journalnode)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.hdfs.qjournal.server.JournalNode'
    hadoop_debug "Appending HADOOP_JOURNALNODE_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_JOURNALNODE_OPTS}"
  ;;
  jmxget)
    CLASS=org.apache.hadoop.hdfs.tools.JMXGet
  ;;
  lsSnapshottableDir)
    CLASS=org.apache.hadoop.hdfs.tools.snapshot.LsSnapshottableDir
  ;;
  mover)
    supportdaemonization="true"
    CLASS=org.apache.hadoop.hdfs.server.mover.Mover
    hadoop_debug "Appending HADOOP_MOVER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_MOVER_OPTS}"
  ;;
  namenode)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.hdfs.server.namenode.NameNode'
    hadoop_debug "Appending HADOOP_NAMENODE_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_NAMENODE_OPTS}"
    hadoop_add_param HADOOP_OPTS hdfs.audit.logger "-Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER}"
  ;;
  nfs3)
    supportdaemonization="true"
    if [[ -n "${HADOOP_PRIVILEGED_NFS_USER}" ]]; then
      secure_service="true"
      secure_user="${HADOOP_PRIVILEGED_NFS_USER}"

      # backward compatiblity
      HADOOP_SECURE_PID_DIR="${HADOOP_SECURE_PID_DIR:-$HADOOP_SECURE_NFS3_PID_DIR}"
      HADOOP_SECURE_LOG_DIR="${HADOOP_SECURE_LOG_DIR:-$HADOOP_SECURE_NFS3_LOG_DIR}"

      hadoop_debug "Appending HADOOP_NFS3_OPTS onto HADOOP_OPTS"
      hadoop_debug "Appending HADOOP_NFS3_SECURE_EXTRA_OPTS onto HADOOP_OPTS"
      HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_NFS3_OPTS} ${HADOOP_NFS3_SECURE_EXTRA_OPTS}"
      CLASS=org.apache.hadoop.hdfs.nfs.nfs3.PrivilegedNfsGatewayStarter
    else
      hadoop_debug "Appending HADOOP_NFS3_OPTS onto HADOOP_OPTS"
      HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_NFS3_OPTS}"
      CLASS=org.apache.hadoop.hdfs.nfs.nfs3.Nfs3
    fi
  ;;
  oev)
    CLASS=org.apache.hadoop.hdfs.tools.offlineEditsViewer.OfflineEditsViewer
  ;;
  oiv)
    CLASS=org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB
  ;;
  oiv_legacy)
    CLASS=org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer
  ;;
  portmap)
    supportdaemonization="true"
    CLASS=org.apache.hadoop.portmap.Portmap
    hadoop_debug "Appending HADOOP_PORTMAP_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_PORTMAP_OPTS}"
  ;;
  secondarynamenode)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode'
    hadoop_debug "Appending HADOOP_SECONDARYNAMENODE_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_SECONDARYNAMENODE_OPTS}"
    hadoop_add_param HADOOP_OPTS hdfs.audit.logger "-Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER}"
  ;;
  snapshotDiff)
    CLASS=org.apache.hadoop.hdfs.tools.snapshot.SnapshotDiff
  ;;
  storagepolicies)
    CLASS=org.apache.hadoop.hdfs.tools.StoragePolicyAdmin
  ;;
  version)
    CLASS=org.apache.hadoop.util.VersionInfo
  ;;
  zkfc)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.hdfs.tools.DFSZKFailoverController'
    hadoop_debug "Appending HADOOP_ZKFC_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_ZKFC_OPTS}"
  ;;
  *)
    CLASS="${COMMAND}"
    if ! hadoop_validate_classname "${CLASS}"; then
      hadoop_exit_with_usage 1
    fi
  ;;
esac

hadoop_verify_user "${COMMAND}"

if [[ ${HADOOP_SLAVE_MODE} = true ]]; then
  hadoop_common_slave_mode_execute "${HADOOP_HDFS_HOME}/bin/hdfs" "${HADOOP_USER_PARAMS[@]}"
  exit $?
fi

if [[ -n "${secure_service}" ]]; then
  HADOOP_SECURE_USER="${secure_user}"
  hadoop_verify_secure_prereq
  hadoop_setup_secure_service
  priv_outfile="${HADOOP_LOG_DIR}/privileged-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.out"
  priv_errfile="${HADOOP_LOG_DIR}/privileged-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.err"
  priv_pidfile="${HADOOP_PID_DIR}/privileged-${HADOOP_IDENT_STRING}-${COMMAND}.pid"
  daemon_outfile="${HADOOP_LOG_DIR}/hadoop-${HADOOP_SECURE_USER}-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.out"
  daemon_pidfile="${HADOOP_PID_DIR}/hadoop-${HADOOP_SECURE_USER}-${HADOOP_IDENT_STRING}-${COMMAND}.pid"
else
  daemon_outfile="${HADOOP_LOG_DIR}/hadoop-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.out"
  daemon_pidfile="${HADOOP_PID_DIR}/hadoop-${HADOOP_IDENT_STRING}-${COMMAND}.pid"
fi

if [[ "${HADOOP_DAEMON_MODE}" != "default" ]]; then
  # shellcheck disable=SC2034
  HADOOP_ROOT_LOGGER="${HADOOP_DAEMON_ROOT_LOGGER}"
  if [[ -n "${secure_service}" ]]; then
    # shellcheck disable=SC2034
    HADOOP_LOGFILE="hadoop-${HADOOP_SECURE_USER}-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.log"
  else
    # shellcheck disable=SC2034
    HADOOP_LOGFILE="hadoop-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.log"
  fi
fi

hadoop_finalize

if [[ -n "${supportdaemonization}" ]]; then
  if [[ -n "${secure_service}" ]]; then
    hadoop_secure_daemon_handler \
    "${HADOOP_DAEMON_MODE}" "${COMMAND}" "${CLASS}"\
    "${daemon_pidfile}" "${daemon_outfile}" \
    "${priv_pidfile}" "${priv_outfile}" "${priv_errfile}" "$@"
  else
    hadoop_daemon_handler "${HADOOP_DAEMON_MODE}" "${COMMAND}" "${CLASS}"\
    "${daemon_pidfile}" "${daemon_outfile}" "$@"
  fi
  exit $?
else
  # shellcheck disable=SC2086
  hadoop_java_exec "${COMMAND}" "${CLASS}" "$@"
fi