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#!/bin/sh

# CONTROLLING STARTUP:
#
# This script relies on few environment variables to determine startup
# behavior, those variables are:
#
#   ES_CLASSPATH -- A Java classpath containing everything necessary to run.
#   JAVA_OPTS    -- Additional arguments to the JVM for heap size, etc
#   ES_JAVA_OPTS -- External Java Opts on top of the defaults set
#
#
# Optionally, exact memory values can be set using the following values, note,
# they can still be set using the `ES_JAVA_OPTS`. Sample format include "512m", and "10g".
#
#   ES_HEAP_SIZE -- Sets both the minimum and maximum memory to allocate (recommended)
#
# As a convenience, a fragment of shell is sourced in order to set one or
# more of these variables. This so-called `include' can be placed in a
# number of locations and will be searched for in order. The lowest
# priority search path is the same directory as the startup script, and
# since this is the location of the sample in the project tree, it should
# almost work Out Of The Box.
#
# Any serious use-case though will likely require customization of the
# include. For production installations, it is recommended that you copy
# the sample to one of /usr/share/elasticsearch/elasticsearch.in.sh,
# /usr/local/share/elasticsearch/elasticsearch.in.sh, or
# /opt/elasticsearch/elasticsearch.in.sh and make your modifications there.
#
# Another option is to specify the full path to the include file in the
# environment. For example:
#
#   $ ES_INCLUDE=/path/to/in.sh elasticsearch -p /var/run/es.pid
#
# Note: This is particularly handy for running multiple instances on a
# single installation, or for quick tests.
#
# If you would rather configure startup entirely from the environment, you
# can disable the include by exporting an empty ES_INCLUDE, or by
# ensuring that no include files exist in the aforementioned search list.
# Be aware that you will be entirely responsible for populating the needed
# environment variables.

# Maven will replace the project.name with elasticsearch below. If that
# hasn't been done, we assume that this is not a packaged version and the
# user has forgotten to run Maven to create a package.

IS_PACKAGED_VERSION='distributions'
if [ "$IS_PACKAGED_VERSION" != "distributions" ]; then
    cat >&2 << EOF
Error: You must build the project with Maven or download a pre-built package
before you can run Elasticsearch. See 'Building from Source' in README.textile
or visit https://www.elastic.co/download to get a pre-built package.
EOF
    exit 1
fi

CDPATH=""
SCRIPT="$0"

# SCRIPT may be an arbitrarily deep series of symlinks. Loop until we have the concrete path.
while [ -h "$SCRIPT" ] ; do
  ls=`ls -ld "$SCRIPT"`
  # Drop everything prior to ->
  link=`expr "$ls" : '.*-> \(.*\)$'`
  if expr "$link" : '/.*' > /dev/null; then
    SCRIPT="$link"
  else
    SCRIPT=`dirname "$SCRIPT"`/"$link"
  fi
done

# determine elasticsearch home
ES_HOME=`dirname "$SCRIPT"`/..

# make ELASTICSEARCH_HOME absolute
ES_HOME=`cd "$ES_HOME"; pwd`


# If an include wasn't specified in the environment, then search for one...
if [ "x$ES_INCLUDE" = "x" ]; then
    # Locations (in order) to use when searching for an include file.
    for include in /usr/share/elasticsearch/elasticsearch.in.sh \
                   /usr/local/share/elasticsearch/elasticsearch.in.sh \
                   /opt/elasticsearch/elasticsearch.in.sh \
                   ~/.elasticsearch.in.sh \
                   "$ES_HOME/bin/elasticsearch.in.sh" \
                   "`dirname "$0"`"/elasticsearch.in.sh; do
        if [ -r "$include" ]; then
            . "$include"
            break
        fi
    done
# ...otherwise, source the specified include.
elif [ -r "$ES_INCLUDE" ]; then
    . "$ES_INCLUDE"
fi

if [ -x "$JAVA_HOME/bin/java" ]; then
    JAVA="$JAVA_HOME/bin/java"
else
    JAVA=`which java`
fi

if [ ! -x "$JAVA" ]; then
    echo "Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME"
    exit 1
fi

if [ -z "$ES_CLASSPATH" ]; then
    echo "You must set the ES_CLASSPATH var" >&2
    exit 1
fi

# don't let JAVA_TOOL_OPTIONS slip in (e.g. crazy agents in ubuntu)
# works around https://bugs.launchpad.net/ubuntu/+source/jayatana/+bug/1441487
if [ "x$JAVA_TOOL_OPTIONS" != "x" ]; then
    echo "Warning: Ignoring JAVA_TOOL_OPTIONS=$JAVA_TOOL_OPTIONS"
    echo "Please pass JVM parameters via JAVA_OPTS instead"
    unset JAVA_TOOL_OPTIONS
fi

# Special-case path variables.
case `uname` in
    CYGWIN*)
        ES_CLASSPATH=`cygpath -p -w "$ES_CLASSPATH"`
        ES_HOME=`cygpath -p -w "$ES_HOME"`
    ;;
esac

# full hostname passed through cut for portability on systems that do not support hostname -s
# export on separate line for shells that do not support combining definition and export
HOSTNAME=`hostname | cut -d. -f1`
export HOSTNAME

# manual parsing to find out, if process should be detached
daemonized=`echo $* | egrep -- '(^-d |-d$| -d |--daemonize$|--daemonize )'`
if [ -z "$daemonized" ] ; then
    exec "$JAVA" $JAVA_OPTS $ES_JAVA_OPTS -Des.path.home="$ES_HOME" -cp "$ES_CLASSPATH" \
          org.elasticsearch.bootstrap.Elasticsearch start "$@"
else
    exec "$JAVA" $JAVA_OPTS $ES_JAVA_OPTS -Des.path.home="$ES_HOME" -cp "$ES_CLASSPATH" \
          org.elasticsearch.bootstrap.Elasticsearch start "$@" <&- &
    retval=$?
    pid=$!
    [ $retval -eq 0 ] || exit $retval
    if [ ! -z "$ES_STARTUP_SLEEP_TIME" ]; then
      sleep $ES_STARTUP_SLEEP_TIME
    fi
    if ! ps -p $pid > /dev/null ; then
      exit 1
    fi
    exit 0
fi

exit $?

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