#!/bin/bash
#
# @(#)jcontrol	1.40 06/01/27
#
# Copyright 2006 Sun Microsystems, Inc. All rights reserved.
# SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
#
# Shell Script to run the Java(tm) Plug-in control panel.
#
# Parse the command-line options
# -r means make associate with the container (i.e browser)
# -u means remove the association with the container
# -c provides the location of the container install
# -j provides the location of the jre install
# if neither -r or -u are specified, run the ControlPanel UI

USAGE='usage: ControlPanel [ (-u scheme | -r scheme) -c cpath -j jrepath ]'
JLERROR='ControlPanel: Error: Invalid JRE location: '
CLERROR='ControlPanel: Error: Invalid container location: '
IPERROR='ControlPanel: Error: Insufficient permission'
ISERROR='ControlPanel: Error: Invalid scheme: '
XLERROR='ControlPanel: Error: Invalid link or copy: '

check_container_dir() {

   if [ ! -d ${1} ]; then
      echo "${CLERROR}${2}"
      exit 1
   fi
   if [ ! -w ${1} ]; then
      echo "${IPERROR}"
      exit 1
   fi
}

link_logic() {
   if [ ${mode} = "reg" ]; then
      ln -s ${1} ${2}
   else
      rm -f ${2}
   fi
}

#
# Get the absolute path to a symbolic link's reference.
#
# Parameters:
#     $* : path - the path to the file (link) to dereference (can have spaces in
#                 the path).
#
# Output:
#     This function writes the path to the link reference to stdout.
#
# Note: This function is not capable of detecting that one or more directories
#       in the path is also a link and unravelling that.
#
dereference() {
    path="$*"
    result=

    #
    # Make sure the path is absolute
    #
    parent="`cd \`dirname \"${path}\"\`; pwd`"
    child="`basename \"${path}\"`"

    #
    # if parent == child, then path == /, and is already absolute
    #
    if [ "${parent}" != "${child}" ]; then
        path="${parent}/${child}"
    fi

    if [ -h "${path}" ]; then
        path=`ls -l "${path}" | sed -e "s#^.*${path} -> ##"`

        # make sure the path is still absolute (starts with '/')
        if expr "${path}" : '[^/]' > /dev/null; then
            path="${parent}/${path}"
        fi
    fi

    echo ${path}
}

#
# Check for all the parts required to launch the control panel relative to the
# given path.
#
#
# Parameters:
#     $* : path - the path to examine, presumably the resolved path to this
#                 script (can have spaces in the path).
#
# Output:
#     If successful, this function outputs the absolute path to a directory
#     containing the Java binary, and ../lib/deploy.jar; otherwise it outputs
#     an empty string.  (Output is to stdout.)
#
# Note: the assumption is that this function returns either:
#
#            <jdk-root>/jre/bin, or
#            <jre-root>/bin
#
#       However, as long as the directory pointed by the path returned by this
#       function contains:
#
#            ./java
#            ../lib/deploy.jar
#
#       it should be possible to successfully launch the JCP from the given
#       information.
#
check_parts() {
    result="`cd \`dirname \"$*\"\`; pwd`"

    # if this is a JDK, we need the JRE subdir
    if [ -d "${result}/../jre/bin" ]; then
        result="`cd \`dirname \"$*\"\`/../jre/bin; pwd`"
    fi

    if [ ! -x "${result}/java" ] || [ ! -f "${result}/../lib/deploy.jar" ]; then
        result=
    fi

    echo ${result}
}

#
# Launch the Java Control Panel.
#
# Parameters:
#     $* : path - the path of this script (can have spaces in the path).
#
launch_jcp() {
    path="$*"
    while [ -h ${path} ]; do
        path="`dereference ${path}`"
    done

    java_home="`check_parts ${path}`"
    if [ -n "${java_home}" ]; then
	# launch the JCP using paths relative to 
	${java_home}/java -Djavaplugin.user.profile=${USER_JPI_PROFILE}    \
	                  -Xbootclasspath/a:${java_home}/../lib/deploy.jar \
	                  ${_JAVA_VM_OPTIONS}                              \
	                  com.sun.deploy.panel.ControlPanel
    else
        echo "${XLERROR}${java_home}"
        exit 1
    fi
}

#
# Manage the process of registering/unregistering the Java Plug-in with a given
# container (browser).
#
manage_container() {
   # Do the "right" thing based on the provided scheme.
   plugin_stem=${java_home}/plugin/${proc}
   if [ ! -d ${plugin_stem} ]; then
      echo "${JLERROR}${java_home}"
      exit 1
   fi

   case ${scheme} in
        ns4 | ns4E )
              plugin_location="${plugin_stem}/ns4"
              if [ ${mode} = "reg" ]; then
                 echo "${plugin_location}"
              fi
              ;;
       ns4L ) 
              plugin_location="${plugin_stem}/ns4"
              filename=`ls ${plugin_location}`
              container_target="${container_home}/plugins"
              check_container_dir ${container_target} ${container_home}
              link_logic ${plugin_location}/${filename} ${container_target}/${filename}
              ;;
     ns610 | ns610L )
              plugin_location="${plugin_stem}/ns610"
              filename=`ls ${plugin_location}`
              container_target="${container_home}/plugins"
              check_container_dir ${container_target} ${container_home}
              link_logic ${plugin_location}/${filename} ${container_target}/${filename}
              ;;
          * ) 
              echo ${ISERROR}${scheme}
              exit 1
   esac
}

while getopts ":r:u:c:j:" opt; do
   case $opt in
      r ) mode="reg";scheme=${OPTARG}
          ;;
      u ) mode="unreg";scheme=${OPTARG}
          ;;
      c ) container_home=${OPTARG}
          ;;
      j ) java_home=${OPTARG}
          ;;
      : ) echo ${USAGE}
          exit 1
          ;;
     \? ) echo ${USAGE}
          exit 1
          ;;
   esac
done

os=`uname -s`
if [ "${os}" = "Linux" ]; then
    case "`uname -m`" in
	i[3-9]86  | ia32 | ia64 | x86_64)
	    proc=i386
	    ;;
	sparc*)
	    proc=sparc
	    ;;
	*)
	    proc="`uname -m`"
	    ;;
    esac
else
    proc=`uname -p`
fi

if [ -z "${scheme}" ] &&
   [ -z "${java_home}" ] && [ -z "${container_home}" ]
then
    # just run the control panel
    launch_jcp $0
elif [ -n "${scheme}" ] &&
     [ -n "${java_home}" ] && [ -n "${container_home}" ]
then
    # try to register/unregister the plugin
    manage_container
else
    # one or more missing args
    echo ${USAGE}
    exit 1
fi   
