bin/hadoop - hadoop - Git at Google

 #!/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.


 # The Hadoop command script
 #
 # Environment Variables
 #
 #   JAVA_HOME        The java implementation to use.  Overrides JAVA_HOME.
 #
 #   HADOOP_CLASSPATH Extra Java CLASSPATH entries.
 #
 #   HADOOP_HEAPSIZE  The maximum amount of heap to use, in MB.
 #                    Default is 1000.
 #
 #   HADOOP_OPTS      Extra Java runtime options.
 #
 #   HADOOP_NAMENODE_OPTS       These options are added to HADOOP_OPTS
 #   HADOOP_CLIENT_OPTS         when the respective command is run.
 #   HADOOP_{COMMAND}_OPTS etc  HADOOP_JT_OPTS applies to JobTracker
 #                              for e.g.  HADOOP_CLIENT_OPTS applies to
 #                              more than one command (fs, dfs, fsck,
 #                              dfsadmin etc)
 #
 #   HADOOP_CONF_DIR  Alternate conf dir. Default is ${HADOOP_HOME}/conf.
 #
 #   HADOOP_ROOT_LOGGER The root appender. Default is INFO,console
 #

 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`

 . "$bin"/hadoop-config.sh

 cygwin=false
 case "`uname`" in
 CYGWIN*) cygwin=true;;
 esac

 # if no args specified, show usage
 if [ $# = 0 ]; then
   echo "Usage: hadoop [--config confdir] COMMAND"
   echo "where COMMAND is one of:"
   echo "  namenode -format     format the DFS filesystem"
   echo "  secondarynamenode    run the DFS secondary namenode"
   echo "  namenode             run the DFS namenode"
   echo "  datanode             run a DFS datanode"
   echo "  dfsadmin             run a DFS admin client"
   echo "  mradmin              run a Map-Reduce admin client"
   echo "  fsck                 run a DFS filesystem checking utility"
   echo "  fs                   run a generic filesystem user client"
   echo "  balancer             run a cluster balancing utility"
   echo "  jobtracker           run the MapReduce job Tracker node"
   echo "  pipes                run a Pipes job"
   echo "  tasktracker          run a MapReduce task Tracker node"
   echo "  job                  manipulate MapReduce jobs"
   echo "  queue                get information regarding JobQueues"
   echo "  version              print the version"
   echo "  jar <jar>            run a jar file"
   echo "  distcp <srcurl> <desturl> copy file or directories recursively"
   echo "  archive -archiveName NAME <src>* <dest> create a hadoop archive"
   echo "  daemonlog            get/set the log level for each daemon"
   echo " or"
   echo "  CLASSNAME            run the class named CLASSNAME"
   echo "Most commands print help when invoked w/o parameters."
   exit 1
 fi

 # get arguments
 COMMAND=$1
 shift

 if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
   . "${HADOOP_CONF_DIR}/hadoop-env.sh"
 fi

 # some Java parameters
 if [ "$JAVA_HOME" != "" ]; then
   #echo "run java in $JAVA_HOME"
   JAVA_HOME=$JAVA_HOME
 fi

 if [ "$JAVA_HOME" = "" ]; then
   echo "Error: JAVA_HOME is not set."
   exit 1
 fi

 JAVA=$JAVA_HOME/bin/java
 JAVA_HEAP_MAX=-Xmx1000m

 # check envvars which might override default args
 if [ "$HADOOP_HEAPSIZE" != "" ]; then
   #echo "run with heapsize $HADOOP_HEAPSIZE"
   JAVA_HEAP_MAX="-Xmx""$HADOOP_HEAPSIZE""m"
   #echo $JAVA_HEAP_MAX
 fi

 # CLASSPATH initially contains $HADOOP_CONF_DIR
 CLASSPATH="${HADOOP_CONF_DIR}"
 CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar

 # for developers, add Hadoop classes to CLASSPATH
 if [ -d "$HADOOP_HOME/build/classes" ]; then
   CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/classes
 fi
 if [ -d "$HADOOP_HOME/build/webapps" ]; then
   CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build
 fi
 if [ -d "$HADOOP_HOME/build/test/classes" ]; then
   CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/test/classes
 fi
 if [ -d "$HADOOP_HOME/build/tools" ]; then
   CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/tools
 fi

 # so that filenames w/ spaces are handled correctly in loops below
 IFS=

 # for releases, add core hadoop jar & webapps to CLASSPATH
 if [ -d "$HADOOP_HOME/webapps" ]; then
   CLASSPATH=${CLASSPATH}:$HADOOP_HOME
 fi
 for f in $HADOOP_HOME/hadoop-*-core.jar; do
   CLASSPATH=${CLASSPATH}:$f;
 done

 # add libs to CLASSPATH
 for f in $HADOOP_HOME/lib/*.jar; do
   CLASSPATH=${CLASSPATH}:$f;
 done

 if [ -d "$HADOOP_HOME/build/ivy/lib/Hadoop/common" ]; then
 for f in $HADOOP_HOME/build/ivy/lib/Hadoop/common/*.jar; do
   CLASSPATH=${CLASSPATH}:$f;
 done
 fi

 for f in $HADOOP_HOME/lib/jsp-2.1/*.jar; do
   CLASSPATH=${CLASSPATH}:$f;
 done

 for f in $HADOOP_HOME/hadoop-*-tools.jar; do
   TOOL_PATH=${TOOL_PATH}:$f;
 done
 for f in $HADOOP_HOME/build/hadoop-*-tools.jar; do
   TOOL_PATH=${TOOL_PATH}:$f;
 done

 # add user-specified CLASSPATH last
 if [ "$HADOOP_CLASSPATH" != "" ]; then
   CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}
 fi

 # default log directory & file
 if [ "$HADOOP_LOG_DIR" = "" ]; then
   HADOOP_LOG_DIR="$HADOOP_HOME/logs"
 fi
 if [ "$HADOOP_LOGFILE" = "" ]; then
   HADOOP_LOGFILE='hadoop.log'
 fi

 # default policy file for service-level authorization
 if [ "$HADOOP_POLICYFILE" = "" ]; then
   HADOOP_POLICYFILE="hadoop-policy.xml"
 fi

 # restore ordinary behaviour
 unset IFS

 # figure out which class to run
 if [ "$COMMAND" = "namenode" ] ; then
   CLASS='org.apache.hadoop.hdfs.server.namenode.NameNode'
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_NAMENODE_OPTS"
 elif [ "$COMMAND" = "secondarynamenode" ] ; then
   CLASS='org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode'
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_SECONDARYNAMENODE_OPTS"
 elif [ "$COMMAND" = "datanode" ] ; then
   CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode'
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_DATANODE_OPTS"
 elif [ "$COMMAND" = "fs" ] ; then
   CLASS=org.apache.hadoop.fs.FsShell
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "dfs" ] ; then
   CLASS=org.apache.hadoop.fs.FsShell
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "dfsadmin" ] ; then
   CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "mradmin" ] ; then
   CLASS=org.apache.hadoop.mapred.tools.MRAdmin
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "fsck" ] ; then
   CLASS=org.apache.hadoop.hdfs.tools.DFSck
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "balancer" ] ; then
   CLASS=org.apache.hadoop.hdfs.server.balancer.Balancer
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_BALANCER_OPTS"
 elif [ "$COMMAND" = "jobtracker" ] ; then
   CLASS=org.apache.hadoop.mapred.JobTracker
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_JOBTRACKER_OPTS"
 elif [ "$COMMAND" = "tasktracker" ] ; then
   CLASS=org.apache.hadoop.mapred.TaskTracker
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_TASKTRACKER_OPTS"
 elif [ "$COMMAND" = "job" ] ; then
   CLASS=org.apache.hadoop.mapred.JobClient
 elif [ "$COMMAND" = "queue" ] ; then
   CLASS=org.apache.hadoop.mapred.JobQueueClient
 elif [ "$COMMAND" = "pipes" ] ; then
   CLASS=org.apache.hadoop.mapred.pipes.Submitter
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "version" ] ; then
   CLASS=org.apache.hadoop.util.VersionInfo
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "jar" ] ; then
   CLASS=org.apache.hadoop.util.RunJar
 elif [ "$COMMAND" = "distcp" ] ; then
   CLASS=org.apache.hadoop.tools.DistCp
   CLASSPATH=${CLASSPATH}:${TOOL_PATH}
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "daemonlog" ] ; then
   CLASS=org.apache.hadoop.log.LogLevel
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "archive" ] ; then
   CLASS=org.apache.hadoop.tools.HadoopArchives
   CLASSPATH=${CLASSPATH}:${TOOL_PATH}
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 elif [ "$COMMAND" = "sampler" ] ; then
   CLASS=org.apache.hadoop.mapred.lib.InputSampler
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
 else
   CLASS=$COMMAND
 fi

 # cygwin path translation
 if $cygwin; then
   CLASSPATH=`cygpath -p -w "$CLASSPATH"`
   HADOOP_HOME=`cygpath -w "$HADOOP_HOME"`
   HADOOP_LOG_DIR=`cygpath -w "$HADOOP_LOG_DIR"`
   TOOL_PATH=`cygpath -p -w "$TOOL_PATH"`
 fi
 # setup 'java.library.path' for native-hadoop code if necessary
 JAVA_LIBRARY_PATH=''
 if [ -d "${HADOOP_HOME}/build/native" -o -d "${HADOOP_HOME}/lib/native" ]; then
   JAVA_PLATFORM=`CLASSPATH=${CLASSPATH} ${JAVA} -Xmx32m org.apache.hadoop.util.PlatformName | sed -e "s/ /_/g"`

   if [ -d "$HADOOP_HOME/build/native" ]; then
     JAVA_LIBRARY_PATH=${HADOOP_HOME}/build/native/${JAVA_PLATFORM}/lib
   fi

   if [ -d "${HADOOP_HOME}/lib/native" ]; then
     if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
       JAVA_LIBRARY_PATH=${JAVA_LIBRARY_PATH}:${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
     else
       JAVA_LIBRARY_PATH=${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
     fi
   fi
 fi

 # cygwin path translation
 if $cygwin; then
   JAVA_LIBRARY_PATH=`cygpath -p "$JAVA_LIBRARY_PATH"`
 fi

 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.dir=$HADOOP_LOG_DIR"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.file=$HADOOP_LOGFILE"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.id.str=$HADOOP_IDENT_STRING"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.root.logger=${HADOOP_ROOT_LOGGER:-INFO,console}"
 if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
   HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$JAVA_LIBRARY_PATH"
 fi
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.policy.file=$HADOOP_POLICYFILE"

 # run it
 exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
	#!/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.


	# The Hadoop command script
	#
	# Environment Variables
	#
	# JAVA_HOME The java implementation to use. Overrides JAVA_HOME.
	#
	# HADOOP_CLASSPATH Extra Java CLASSPATH entries.
	#
	# HADOOP_HEAPSIZE The maximum amount of heap to use, in MB.
	# Default is 1000.
	#
	# HADOOP_OPTS Extra Java runtime options.
	#
	# HADOOP_NAMENODE_OPTS These options are added to HADOOP_OPTS
	# HADOOP_CLIENT_OPTS when the respective command is run.
	# HADOOP_{COMMAND}_OPTS etc HADOOP_JT_OPTS applies to JobTracker
	# for e.g. HADOOP_CLIENT_OPTS applies to
	# more than one command (fs, dfs, fsck,
	# dfsadmin etc)
	#
	# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf.
	#
	# HADOOP_ROOT_LOGGER The root appender. Default is INFO,console
	#

	bin=`dirname "$0"`
	bin=`cd "$bin"; pwd`

	. "$bin"/hadoop-config.sh

	cygwin=false
	case "`uname`" in
	CYGWIN*) cygwin=true;;
	esac

	# if no args specified, show usage
	if [ $# = 0 ]; then
	echo "Usage: hadoop [--config confdir] COMMAND"
	echo "where COMMAND is one of:"
	echo " namenode -format format the DFS filesystem"
	echo " secondarynamenode run the DFS secondary namenode"
	echo " namenode run the DFS namenode"
	echo " datanode run a DFS datanode"
	echo " dfsadmin run a DFS admin client"
	echo " mradmin run a Map-Reduce admin client"
	echo " fsck run a DFS filesystem checking utility"
	echo " fs run a generic filesystem user client"
	echo " balancer run a cluster balancing utility"
	echo " jobtracker run the MapReduce job Tracker node"
	echo " pipes run a Pipes job"
	echo " tasktracker run a MapReduce task Tracker node"
	echo " job manipulate MapReduce jobs"
	echo " queue get information regarding JobQueues"
	echo " version print the version"
	echo " jar <jar> run a jar file"
	echo " distcp <srcurl> <desturl> copy file or directories recursively"
	echo " archive -archiveName NAME <src>* <dest> create a hadoop archive"
	echo " daemonlog get/set the log level for each daemon"
	echo " or"
	echo " CLASSNAME run the class named CLASSNAME"
	echo "Most commands print help when invoked w/o parameters."
	exit 1
	fi

	# get arguments
	COMMAND=$1
	shift

	if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
	. "${HADOOP_CONF_DIR}/hadoop-env.sh"
	fi

	# some Java parameters
	if [ "$JAVA_HOME" != "" ]; then
	#echo "run java in $JAVA_HOME"
	JAVA_HOME=$JAVA_HOME
	fi

	if [ "$JAVA_HOME" = "" ]; then
	echo "Error: JAVA_HOME is not set."
	exit 1
	fi

	JAVA=$JAVA_HOME/bin/java
	JAVA_HEAP_MAX=-Xmx1000m

	# check envvars which might override default args
	if [ "$HADOOP_HEAPSIZE" != "" ]; then
	#echo "run with heapsize $HADOOP_HEAPSIZE"
	JAVA_HEAP_MAX="-Xmx""$HADOOP_HEAPSIZE""m"
	#echo $JAVA_HEAP_MAX
	fi

	# CLASSPATH initially contains $HADOOP_CONF_DIR
	CLASSPATH="${HADOOP_CONF_DIR}"
	CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar

	# for developers, add Hadoop classes to CLASSPATH
	if [ -d "$HADOOP_HOME/build/classes" ]; then
	CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/classes
	fi
	if [ -d "$HADOOP_HOME/build/webapps" ]; then
	CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build
	fi
	if [ -d "$HADOOP_HOME/build/test/classes" ]; then
	CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/test/classes
	fi
	if [ -d "$HADOOP_HOME/build/tools" ]; then
	CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/tools
	fi

	# so that filenames w/ spaces are handled correctly in loops below
	IFS=

	# for releases, add core hadoop jar & webapps to CLASSPATH
	if [ -d "$HADOOP_HOME/webapps" ]; then
	CLASSPATH=${CLASSPATH}:$HADOOP_HOME
	fi
	for f in $HADOOP_HOME/hadoop-*-core.jar; do
	CLASSPATH=${CLASSPATH}:$f;
	done

	# add libs to CLASSPATH
	for f in $HADOOP_HOME/lib/*.jar; do
	CLASSPATH=${CLASSPATH}:$f;
	done

	if [ -d "$HADOOP_HOME/build/ivy/lib/Hadoop/common" ]; then
	for f in $HADOOP_HOME/build/ivy/lib/Hadoop/common/*.jar; do
	CLASSPATH=${CLASSPATH}:$f;
	done
	fi

	for f in $HADOOP_HOME/lib/jsp-2.1/*.jar; do
	CLASSPATH=${CLASSPATH}:$f;
	done

	for f in $HADOOP_HOME/hadoop-*-tools.jar; do
	TOOL_PATH=${TOOL_PATH}:$f;
	done
	for f in $HADOOP_HOME/build/hadoop-*-tools.jar; do
	TOOL_PATH=${TOOL_PATH}:$f;
	done

	# add user-specified CLASSPATH last
	if [ "$HADOOP_CLASSPATH" != "" ]; then
	CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}
	fi

	# default log directory & file
	if [ "$HADOOP_LOG_DIR" = "" ]; then
	HADOOP_LOG_DIR="$HADOOP_HOME/logs"
	fi
	if [ "$HADOOP_LOGFILE" = "" ]; then
	HADOOP_LOGFILE='hadoop.log'
	fi

	# default policy file for service-level authorization
	if [ "$HADOOP_POLICYFILE" = "" ]; then
	HADOOP_POLICYFILE="hadoop-policy.xml"
	fi

	# restore ordinary behaviour
	unset IFS

	# figure out which class to run
	if [ "$COMMAND" = "namenode" ] ; then
	CLASS='org.apache.hadoop.hdfs.server.namenode.NameNode'
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_NAMENODE_OPTS"
	elif [ "$COMMAND" = "secondarynamenode" ] ; then
	CLASS='org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode'
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_SECONDARYNAMENODE_OPTS"
	elif [ "$COMMAND" = "datanode" ] ; then
	CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode'
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_DATANODE_OPTS"
	elif [ "$COMMAND" = "fs" ] ; then
	CLASS=org.apache.hadoop.fs.FsShell
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "dfs" ] ; then
	CLASS=org.apache.hadoop.fs.FsShell
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "dfsadmin" ] ; then
	CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "mradmin" ] ; then
	CLASS=org.apache.hadoop.mapred.tools.MRAdmin
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "fsck" ] ; then
	CLASS=org.apache.hadoop.hdfs.tools.DFSck
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "balancer" ] ; then
	CLASS=org.apache.hadoop.hdfs.server.balancer.Balancer
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_BALANCER_OPTS"
	elif [ "$COMMAND" = "jobtracker" ] ; then
	CLASS=org.apache.hadoop.mapred.JobTracker
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_JOBTRACKER_OPTS"
	elif [ "$COMMAND" = "tasktracker" ] ; then
	CLASS=org.apache.hadoop.mapred.TaskTracker
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_TASKTRACKER_OPTS"
	elif [ "$COMMAND" = "job" ] ; then
	CLASS=org.apache.hadoop.mapred.JobClient
	elif [ "$COMMAND" = "queue" ] ; then
	CLASS=org.apache.hadoop.mapred.JobQueueClient
	elif [ "$COMMAND" = "pipes" ] ; then
	CLASS=org.apache.hadoop.mapred.pipes.Submitter
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "version" ] ; then
	CLASS=org.apache.hadoop.util.VersionInfo
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "jar" ] ; then
	CLASS=org.apache.hadoop.util.RunJar
	elif [ "$COMMAND" = "distcp" ] ; then
	CLASS=org.apache.hadoop.tools.DistCp
	CLASSPATH=${CLASSPATH}:${TOOL_PATH}
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "daemonlog" ] ; then
	CLASS=org.apache.hadoop.log.LogLevel
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "archive" ] ; then
	CLASS=org.apache.hadoop.tools.HadoopArchives
	CLASSPATH=${CLASSPATH}:${TOOL_PATH}
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	elif [ "$COMMAND" = "sampler" ] ; then
	CLASS=org.apache.hadoop.mapred.lib.InputSampler
	HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
	else
	CLASS=$COMMAND
	fi

	# cygwin path translation
	if $cygwin; then
	CLASSPATH=`cygpath -p -w "$CLASSPATH"`
	HADOOP_HOME=`cygpath -w "$HADOOP_HOME"`
	HADOOP_LOG_DIR=`cygpath -w "$HADOOP_LOG_DIR"`
	TOOL_PATH=`cygpath -p -w "$TOOL_PATH"`
	fi
	# setup 'java.library.path' for native-hadoop code if necessary
	JAVA_LIBRARY_PATH=''
	if [ -d "${HADOOP_HOME}/build/native" -o -d "${HADOOP_HOME}/lib/native" ]; then
	JAVA_PLATFORM=`CLASSPATH=${CLASSPATH} ${JAVA} -Xmx32m org.apache.hadoop.util.PlatformName \| sed -e "s/ /_/g"`

	if [ -d "$HADOOP_HOME/build/native" ]; then
	JAVA_LIBRARY_PATH=${HADOOP_HOME}/build/native/${JAVA_PLATFORM}/lib
	fi

	if [ -d "${HADOOP_HOME}/lib/native" ]; then
	if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
	JAVA_LIBRARY_PATH=${JAVA_LIBRARY_PATH}:${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
	else
	JAVA_LIBRARY_PATH=${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
	fi
	fi
	fi

	# cygwin path translation
	if $cygwin; then
	JAVA_LIBRARY_PATH=`cygpath -p "$JAVA_LIBRARY_PATH"`
	fi

	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.dir=$HADOOP_LOG_DIR"
	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.file=$HADOOP_LOGFILE"
	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.id.str=$HADOOP_IDENT_STRING"
	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.root.logger=${HADOOP_ROOT_LOGGER:-INFO,console}"
	if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
	HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$JAVA_LIBRARY_PATH"
	fi
	HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.policy.file=$HADOOP_POLICYFILE"

	# run it
	exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"