#! /bin/sh
#
#     @(#)java_wrapper.sh	1.33 97/10/16
#
#===================================================================
# THIS SCRIPT AND JAVA WILL NOT RUN UNDER SUNOS4.X, AKA SOLARIS 1.X.  
#===================================================================

# Set up default variable values if not supplied by the user.

PRG=`type -p $0` >/dev/null 2>&1
# If PRG is a symlink, trace it to the real home directory

while [ -L "$PRG" ]
do
    newprg=`expr "\`/bin/ls -l "$PRG"\`" : ".*$PRG -> \(.*\)"`
    expr "$newprg" : / >/dev/null || newprg="`dirname $PRG`/$newprg"
    PRG="$newprg"
done

J_HOME=`dirname $PRG`/..
progname=`basename $0`
ARCH=`arch`
LANG=ja

# The default THREADS_TYPE is "green_threads".  To change the default change
# the setting of the DEFAULT_THREADS_FLAG variable.  The only valid values 
# of that variable are 'green' and 'native'. 
# 
# This introduces a dependency of this wrapper on the policy used to do builds.
# e.g. the usage of the name "green_threads" here is dependent on the build
# scripts which use the same name. Since this is somewhat analogous to the
# wrapper already depending on the build scripts putting the executable in
# a specific place (JAVA_HOME/bin/${ARCH}), the new dependency does not
# seem all that bad.

DEFAULT_THREADS_FLAG=green

if [ "${THREADS_FLAG:-${DEFAULT_THREADS_FLAG}}" = native ]
then 
    THREADS_TYPE=native_threads
else
    THREADS_TYPE=green_threads
fi
export THREADS_TYPE
#echo "Using executables built for $THREADS_TYPE"

#
# If -native or -green is the first argument, override threads type
# based on that. Also, remove it from $@, because this is an argument
# _only_ to this wrapper. This is an alternative to setting
# THREADS_FLAG on Solaris.
#
if [ "$1" = "-native" -o "$1" = "-green" ]; then
    if [ "$1" = "-native" ]; then
      THREADS_TYPE=native_threads
    else
      THREADS_TYPE=green_threads
    fi
    shift 1
fi

if [ -z "$JAVA_HOME" ] ; then
    export JAVA_HOME
    JAVA_HOME=$J_HOME
fi

#
# For some programs like appletviewer, it is important that "." not be
# in the classpath by default (unless the user set the CLASSPATH
# explicitly). Applications that fit in this list are ones that load
# classes through a ClassLoader, where classes coming off . will end
# up being system classes. For now we know of only appletviewer.
#
NO_DOT_LIST="appletviewer"
DEFAULT_CLASSPATH="."
for excluded in ${NO_DOT_LIST}; do
    if [ ${excluded} = ${progname} ]; then
        DEFAULT_CLASSPATH="";
    fi
done

CLASSPATH="${CLASSPATH:-${DEFAULT_CLASSPATH}}"
if [ -z "${CLASSPATH}" ] ; then
    CLASSPATH="$JAVA_HOME/classes:$JAVA_HOME/lib/classes.jar:$JAVA_HOME/lib/rt.jar:$JAVA_HOME/lib/i18n.jar:$JAVA_HOME/lib/classes.zip"
else
    CLASSPATH="$CLASSPATH:$JAVA_HOME/classes:$JAVA_HOME/lib/classes.jar:$JAVA_HOME/lib/rt.jar:$JAVA_HOME/lib/i18n.jar:$JAVA_HOME/lib/classes.zip"
fi

export CLASSPATH

# Linux: deal with ensuring that the correct versions of libc and libdl are
# the ones that java will use
binPath="${JAVA_HOME}/bin/${ARCH}/${THREADS_TYPE}"
libPath="${JAVA_HOME}/lib/${ARCH}/${THREADS_TYPE}"

# only do this if we're not in the JDK build environment
if [ -z "${IN_JDK_BUILD}" ] 
then
    if [ -x ${JAVA_HOME}/bin/checkVersions ]
    then
        if ${JAVA_HOME}/bin/checkVersions java
	then
	    # note the trailing colon is required!
	    JDK_LIBS="${libPath}/linuxlibs:"
	fi
    else
        echo "Warning: can't find ${JAVA_HOME}/bin/checkVersions, hope that's ok"
    fi
fi

LD_LIBRARY_PATH="$JAVA_HOME/lib/${ARCH}/$THREADS_TYPE:${JDK_LIBS}$LD_LIBRARY_PATH"
export LD_LIBRARY_PATH

LD_PRELOAD="$JAVA_HOME/lib/${ARCH}/$THREADS_TYPE/liblocale.so"
export LD_PRELOAD


orig_progname="${progname}"
if [ -n "$NS_JAVA" ]
then
    progname="${progname}_ns"
elif [ -n "$DYN_JAVA" ]
then
    progname="${progname}_dyn"
fi

prog=$JAVA_HOME/bin/${ARCH}/${THREADS_TYPE}/${progname}

if [ -f $prog ]
then
    exec $DEBUG_PROG $prog $opts "$@"
else
    prog=$JAVA_HOME/bin/${ARCH}/${THREADS_TYPE}/${orig_progname}
    if [ -f $prog ]
    then
        exec $DEBUG_PROG $prog $opts "$@"
    fi
fi
    
echo >&2 "$progname was not found in ${prog}"
exit 1