#!/bin/sh# This script attempts to locate the jre directory of the current# Java installation, even when java is not in the path# It works with  the following rpm files:#       Sun's Java Software Development Kit (Linux/Windows)#       Sun's Java Runtime Environment (Linux)#       IBM's Java Software Development Kit (linux)# We require an option to specify which directory is desired:# --java: directory with java executable# --javac: directory with javac executable# --jni: directory where JNI code is placedif [ "$1" = "--jni" ]; then    jni=yeselif [ "$1" = "--java" ]; then    java=yeselif [ "$1" = "--javac" ]; then    javac=yeselse    echo "Usage: tos-locate-jre --java|--javac|--jni" >&2    exit 2firpmlocate () {    javarpm=$1    javapath=`rpm -ql $1 2>/dev/null | grep "bin/$2$"`}pathlocate () {    javapath=`which $1 2>/dev/null`    while [ -n "$javapath" -a -h "$javapath" ]; do	javapath=`readlink -q $javapath`    done    test -n "$javapath"}case `uname` in    CYGWIN*)    # Hopefully this will always work on cygwin with Sun's Java    jversion=`regtool -q get '\\HKLM\\SOFTWARE\\JavaSoft\\Java Development Kit\\CurrentVersion'`    if [ $? != 0 ]; then	exit 1    fi    jhome=`regtool -q get '\\HKLM\SOFTWARE\\JavaSoft\\Java Development Kit\\'$jversion'\\JavaHome'`    if [ $? != 0 ]; then	exit 1    fi    jhome=`cygpath -u "$jhome"`    ;;    Darwin)    #Just statically typed in, uses default location of installation for XTools.  May need to be fixed    jhome=/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK    ;;    Linux)    # Check gentoo java configuration    javapath=`java-config -c 2>/dev/null`    # We check the path first, on the assumption that that's the preferred    # version.    if [ -z "$javapath" ]; then        pathlocate javac || { test -z "$javac" && pathlocate java; }    fi    if [ -z "$javapath" ]; then	# We try a bunch of standard names, before resorting to rpm -qa	rpmlocate IBMJava2-SDK javac || \	    rpmlocate IBMJava2-142-ia32-SDK javac || \	    rpmlocate j2sdk javac || \	    rpmlocate jdk javac || \	    { test -z "$javac" && rpmlocate j2re java; } || \	    { test -z "$javac" && rpmlocate jre java; }	if [ -z "$javapath" ]; then	    # lastly, check for a weirdly named IBMJava2	    name=`rpm -qa | grep IBMJava2 | head -1`	    if [ -n "$name" ]; then		rpmlocate $name javac	    fi	fi    fi    if [ -z "$javapath" ]; then	exit 1    fi    jbin=`dirname "$javapath"`    jhome=`dirname "$jbin"`    ;;    FreeBSD)    # We check the path first, on the assumption that that's the preferred    # version.    pathlocate javac || { test -z "$javac" && pathlocate java; }    if [ -n "$javapath" ]; then	jbin=`dirname "$javapath"`    else	if [ -f /usr/local/jdk1.4*/bin/java ]; then	    jbin=/usr/local/jdk1.4*/bin	else	    exit 1	fi    fi    jhome=`dirname $jbin`    ;;esac# These are correct for Sun and IBM's x86 Java versionsif [ "$jni" = "yes" ]; then    jnilocate () {	dir="$1"	test -d "$1"    }    # Look for a likely JNI directory    # Windows, and IBM Java: in jre/bin    # Sun Java on Linux: in jre/lib/i386    if [ `uname` = "Darwin" ]; then 	jnilocate "/Library/java/Extensions"    elif "$jhome/bin/java" -version 2>&1 | grep -q IBM || cygpath -w / >/dev/null 2>/dev/null; then	jnilocate "$jhome/jre/bin" || jnilocate "$jhome/bin"    else	arch=`uname -m`	jnilocate "$jhome/jre/lib/$arch" || \	    jnilocate "$jhome/jre/lib/i386" || \	    jnilocate "$jhome/lib/$arch" || \	    jnilocate "$jhome/lib/i386"    fielif [ "$javac" = "yes" ]; then if [ `uname` = "Darwin" ]; then   dir="$jhome/Commands" else    dir="$jhome/bin" fielif [ "$java" = "yes" ]; then if [ `uname` = "Darwin" ]; then     dir="$jhome/Commands" else    dir="$jhome/bin" fifi# Check that what we found actually existsif [ -d "$dir" ]; then echo $direlse exit 1fi