Listing 1 Modified Java installation script

#!/bin/sh
PATH=/usr/bin:/bin
NODOT_VERSION=142_04
javahome=j2re1.4.2_04
PACKED_JARS="lib/rt.jar lib/jsse.jar lib/charsets.jar \
  lib/ext/localedata.jar lib/plugin.jar javaws/javaws.jar"
LINUX_RPM=
JAVAWS_BIN=javaws/javaws
libthread_path=
localinstall=$1
diskSpaceRequired=50338
MIME_TYPE=application/x-java-jnlp-file

outname=install.sfx.$$
trap 'rm -f $outname; exit 1' HUP INT QUIT TERM

echo "Unpacking..."
tail +131 $0 > $outname
chmod +x $outname
echo "Extracting..."
./$outname > /dev/null 2>&1
rm -f $outname

if [ -z "$LINUX_RPM" ]; then
 UNPACK_CMD=""
 if [ -f $javahome/lib/unpack ]; then
   UNPACK_CMD=$javahome/lib/unpack
   chmod +x $UNPACK_CMD
   packerror=""
   for i in $PACKED_JARS; do
        if [ -f $javahome/'dirname $i'/'basename $i .jar'.pack ]; then
            printf "Creating %s\n" $javahome/$i
            $UNPACK_CMD $javahome/'dirname $i'/'basename $i \
              .jar'.pack $javahome/$i
            if [ ! -f $javahome/$i ]; then
                printf "Failed to unpack jar files %s. Please \
                  refer\n" $i
                printf "to the Troubleshooting section of the \
                  Installation\n"
                printf "Instructions on the download page for \
                  more information.\n"
                packerror="1"
            fi
            rm -f $javahome/'dirname $i'/'basename $i .jar'.pack
        fi
   done
   rm -f $UNPACK_CMD
   if [  x$packerror = x1 ]; then
        printf "ERROR: Installation failed. Please refer to the "
        printf "Troubleshooting Section of the Installation "
        printf "Instructions on the download page "
        if [ -d $javahome ]; then
            /bin/rm -rf $javahome
            exit 2
        fi
   fi
 fi

 if [ -n "$libthread_path" ] && [ -f "$libthread_path/'uname \
   -r'/libthread.so.1" ]; then
  echo "Making libthread links"
  ln -s 'uname -r'/libthread.so.1 $libthread_path/libthread.so.1
  ln -s libthread.so.1 $libthread_path/libthread.so
 fi

 userid='expr "\'id\'" : ".*uid=[0-9]*(\(.[0-9a-z]*\)) .*"'
 if [ -f $HOME/.java/properties$NODOT_VERSION ]; then
  if [ x$userid = "xroot" ] ; then
    su $USER -c "mv -f $HOME/.java/properties$NODOT_VERSION \
      $HOME/.java/_properties$NODOT_VERSION"
  else
    mv -f $HOME/.java/properties$NODOT_VERSION \
      $HOME/.java/_properties$NODOT_VERSION
  fi
 fi

 if [ ! x$javahome = "x" ]; then
  PREFS_LOCATION=$javahome
  if [ x$userid = "xroot" ] ; then
    if [ x$localinstall = "x-localinstall" ] ; then
      PREFS_LOCATION=/etc/.java
    fi
  fi
  if [ ! -d $PREFS_LOCATION ] ; then
    mkdir -m 755 $PREFS_LOCATION
  fi
  if [ ! -d $PREFS_LOCATION/.systemPrefs ] ; then
    mkdir -m 755 $PREFS_LOCATION/.systemPrefs
  fi
  if [ ! -f $PREFS_LOCATION/.systemPrefs/.system.lock ] ; then
    touch $PREFS_LOCATION/.systemPrefs/.system.lock
    chmod 644 $PREFS_LOCATION/.systemPrefs/.system.lock
  fi
  if [ ! -f $PREFS_LOCATION/.systemPrefs/.systemRootModFile ] ; then
    touch $PREFS_LOCATION/.systemPrefs/.systemRootModFile
    chmod 644 $PREFS_LOCATION/.systemPrefs/.systemRootModFile
  fi
 fi

 if [ -n "$JAVAWS_BIN" -a -z "$JAVAWS_PRIVATE" ]; then
  FULLJAVAHOME='cd $javahome; pwd'
  if [ -w ${HOME}/.mailcap ]; then
    jGrep='grep -n ${MIME_TYPE} ${HOME}/.mailcap'
    if [ -n "$jGrep" ] ; then
      grep -v ${MIME_TYPE} < ${HOME}/.mailcap | grep -v \
        "# Java Web Start" > /tmp/.mailcap1
      mv /tmp/.mailcap1 ${HOME}/.mailcap
    fi
    # Doesn't contain application/x-java-jnlp-file file, add it.
    echo "# Java Web Start" >> ${HOME}/.mailcap
    echo "${MIME_TYPE}; $FULLJAVAHOME/$JAVAWS_BIN %s" \
      >> ${HOME}/.mailcap
  elif [ -w ${HOME}/ ]; then
    # .mailcap doesn't exist, create it.
    echo "# Java Web Start" > ${HOME}/.mailcap
    echo "${MIME_TYPE}; $FULLJAVAHOME/$JAVAWS_BIN %s" \
      >> ${HOME}/.mailcap
  fi
  if [ -w ${HOME}/.mime.types ]; then
    # the file exists, make sure it contains jnlp
    jGrep='grep ${MIME_TYPE} ${HOME}/.mime.types'
    if [ -z "${jGrep}" ]; then
      # doesn't contain Javaws, add it
      echo "type=${MIME_TYPE} desc=\"Java Web Start\" \
        exts=\"jnlp\"" >> ${HOME}/.mime.types
    fi
  elif [ -w ${HOME}/ ]; then
    # Doesn't exist so create it, even though if it doesn't exist it
    # implies you are not using Communicator, but we'll create it 
    # on the chance that you do install Communicator.
    echo '#--Netscape Communications Corporation MIME Information' > \
     ${HOME}/.mime.types
    echo '#Do not delete the above line. It is used to identify \
      the file type.' >> ${HOME}/.mime.types 
    echo '#mime types added by Netscape Helper' >> \
      ${HOME}/.mime.types
    echo 'type=application/x-java-jnlp-file desc="Java Web Start" \
     exts="jnlp"' >> ${HOME}/.mime.types
  fi
 fi
fi

echo "Done."
exit 0