hadoop/bin/hadoop
Christopher Douglas fc1bf705e9 HADOOP-6142. Update documentation and use of harchives for relative paths added
in MAPREDUCE-739. Contributed by Mahadev Konar


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@794943 13f79535-47bb-0310-9956-ffa450edef68
2009-07-17 02:06:42 +00:00

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#!/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.
# This script runs the hadoop core commands.
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
. "$bin"/hadoop-config.sh
function print_usage(){
echo "Usage: hadoop [--config confdir] COMMAND"
echo " where COMMAND is one of:"
echo " fs run a generic filesystem user client"
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 -p <parent path> <src>* <dest> create a hadoop archive"
echo " classpath prints the class path needed to get the"
echo " Hadoop jar and the required libraries"
echo " daemonlog get/set the log level for each daemon"
echo " or"
echo " CLASSNAME run the class named CLASSNAME"
echo ""
echo "Most commands print help when invoked w/o parameters."
}
if [ $# = 0 ]; then
print_usage
exit
fi
COMMAND=$1
case $COMMAND in
#hdfs commands
namenode|secondarynamenode|datanode|dfs|dfsadmin|fsck|balancer)
echo "DEPRECATED: Use of this script to execute hdfs command is deprecated."
echo "Instead use the hdfs command for it."
echo ""
#try to locate hdfs and if present, delegate to it.
if [ -f "${HADOOP_HDFS_HOME}"/bin/hdfs ]; then
exec "${HADOOP_HDFS_HOME}"/bin/hdfs $*
else
echo "HDFS not found."
exit
fi
;;
#mapred commands
mradmin|jobtracker|tasktracker|pipes|job|queue)
echo "DEPRECATED: Use of this script to execute mapred command is deprecated."
echo "Instead use the mapred command for it."
echo ""
#try to locate mapred and if present, delegate to it.
if [ -f "${HADOOP_MAPRED_HOME}"/bin/mapred ]; then
exec "${HADOOP_MAPRED_HOME}"/bin/mapred $*
else
echo "MAPRED not found."
exit
fi
;;
classpath)
if $cygwin; then
CLASSPATH=`cygpath -p -w "$CLASSPATH"`
fi
echo $CLASSPATH
exit
;;
#core commands
*)
# the core commands
if [ "$COMMAND" = "fs" ] ; then
CLASS=org.apache.hadoop.fs.FsShell
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 $HADOOP_CLIENT_OPTS"
else
CLASS=$COMMAND
fi
shift
if $cygwin; then
CLASSPATH=`cygpath -p -w "$CLASSPATH"`
fi
exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
;;
esac