#! /bin/sh

if [ -z "$BTRACE_HOME" -o ! -d "$BTRACE_HOME" ] ; then
  # resolve links - $0 could be a link to btrace's home
  PRG="$0"
  progname=`basename "$0"`
  BTRACE_HOME=`dirname "$PRG"`/..
  BTRACE_HOME=`cd "$BTRACE_HOME" && pwd`
fi

if [ -f "${BTRACE_HOME}/build/btrace-client.jar" ] ; then
    if [ "${JAVA_HOME}" != "" ]; then
         TOOLS_JAR="${JAVA_HOME}/lib/tools.jar"
         if [ ! -f ${TOOLS_JAR} ] ; then
           case "`uname`" in
             Darwin*)
               # In older JDK versions for Mac OS X, tools.jar is classes.jar 
               # and is kept in a different location. Check if we can locate
               # classes.jar based on ${JAVA_VERSION}
               TOOLS_JAR="/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Classes/classes.jar"

               # if we can't find, try relative path from ${JAVA_HOME}. Usually,
               # /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home
               # is JAVA_HOME. (or whatever version beyond 1.6.0!)
               if [ ! -f ${TOOLS_JAR} ] ; then
                 TOOLS_JAR="${JAVA_HOME}/../Classes/classes.jar"
               fi

               # If we still can't find, tell the user to set JAVA_VERSION.
               # This way, we can avoid zip file errors from the agent side
               # and "connection refused" message from client.
               if [ ! -f ${TOOLS_JAR} ] ; then
                 echo "Please set JAVA_VERSION to the target java version"
                 exit 1
               fi
               ;;
           esac
         fi
       ${JAVA_HOME}/bin/java -cp ${BTRACE_HOME}/build/btrace-client.jar:${TOOLS_JAR}:/usr/share/lib/java/dtrace.jar com.sun.btrace.client.Main $*
    else
       echo "Please set JAVA_HOME before running this script"
       exit 1
    fi
else
    echo "Please set BTRACE_HOME before running this script"
    exit 1
fi