#!/bin/sh

#
# @(#)java_wrapper_linux.sh	1.12 01/03/12
#
# Copyright 1994-2001 by Sun Microsystems, Inc.,
# 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
# All rights reserved.
#
# This software is the confidential and proprietary information
# of Sun Microsystems, Inc. ("Confidential Information").  You
# shall not disclose such Confidential Information and shall use
# it only in accordance with the terms of the license agreement
# you entered into with Sun.
#

PRG=$0
SVPATH="$PATH"
PATH=/bin:/usr/bin

progname=`basename $0`
case "`uname -m`" in
    i[3-6]86  | ia32 | ia64)
        proc=i386
        ;;
    sparc*)
        proc=sparc
        ;;
    *)
        proc="`uname -m`"
        ;;
esac

# Resolve symlinks. See 4152645.
while [ -L "$PRG" ]; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/' > /dev/null; then
	PRG="$link"
    else
	PRG="`dirname $PRG`/$link"
    fi
done

APPHOME=`dirname "$PRG"`/.. 
JREHOME=$APPHOME/jre

# Where is JRE?
unset jre
if [ -f "${JREHOME}/lib/${proc}/libjava.so" ]; then
    jre="${JREHOME}"
fi
if [ -f "${APPHOME}/lib/${proc}/libjava.so" ]; then
    jre="${APPHOME}"
fi
if [ "x${jre}" = "x" ]; then
    echo "Error: can't find libjava.so."
    exit 1
fi

# Get the canonicalized absolute pathnames
jre="`$jre/bin/realpath $jre`"
APPHOME="`${jre}/bin/realpath $APPHOME`"
JREHOME="`${jre}/bin/realpath $JREHOME`"
export APPHOME JREHOME

# Select vm type
ttype=native_threads
if grep "^$1\$" ${jre}/lib/jvm.cfg > /dev/null; then
    # User specified some VM type known to jvm.cfg.
    vmtype=`echo $1 | cut -c 2-`
else
    # User didn't specify a VM type, see if default is classic.
    default=`grep -v '^#' "${jre}/lib/jvm.cfg" | head -1`
    vmtype=`echo ${default} | cut -c 2-`
fi

if [ "${vmtype}" = "classic" ]; then
    ttype=green_threads
    LD_BIND_NOW=yes
    export LD_BIND_NOW
    _JVM_THREADS_TYPE=green_threads
    export _JVM_THREADS_TYPE
fi              


# If jre is in a jre subdir, include parent dir libraries in lib path.  This
# needs to be cleaned up because -Xrun libraries are the ones that need it.
if [ "${jre}" = "$JREHOME" ]; then
   JAVA_LIBRARY_PATH=":${jre}/../lib/${proc}"
fi
# Set LD_LIBRARY_PATH for libjvm.so (necessitated by ld.so bugid 4176579)
JAVA_LIBRARY_PATH="${jre}/lib/${proc}/${vmtype}$JAVA_LIBRARY_PATH"

# Set LD_LIBRARY_PATH to find libawt.so etc.
JAVA_LIBRARY_PATH="${jre}/lib/${proc}:${jre}/lib/${proc}/${ttype}/:${JAVA_LIBRARY_PATH}"

LD_LIBRARY_PATH="${JAVA_LIBRARY_PATH}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
export LD_LIBRARY_PATH

# bug #4344135 workaround
# A thread currently waiting on a I/O operation will not wake up if one
# of the files involved is actually closed (last close - the file is
# no longer accessible but the thread is still waiting in the kernel).
# The library libpreemptive_close.so is dynamically linked to the JVM 
# iff the J2SE_PREEMPTCLOSE environment variable is set to 1
#
if [ "$J2SE_PREEMPTCLOSE" = 1 ]; then
   LD_PRELOAD=${LD_PRELOAD}:libpreemptive_close.so
   export LD_PRELOAD
fi

prog="$APPHOME/bin/${proc}/${ttype}/${progname}"

# Run.
if [ -x "$prog" ]
then
     # Calling: exec $DEBUG_PROG "$prog" "$@"
     PATH="$SVPATH"
     exec $DEBUG_PROG "$prog" "$@" 
else
    echo >&2 "$progname was not found in ${prog}"
    exit 1
fi