#!/bin/sh

# Copyright 2015 VMware, Inc.  All rights reserved. -- VMware Confidential

usage ()
{
   echo 'Usage : esxgdb -e <target-esx-host>'
   echo '        where <target-esx-host> is where you want to debug/test'
   exit
}

if [ "$#" -ne 2 ]
then
  usage
fi

echo 'The purpose of this shell script is to install/copy all the required gdb '
echo 'files to the desired ESX host to enable ESX debugging. After this script '
echo 'finishes, login to the ESX host and execute the shell script '
echo
echo '/tmp/gdbDir/esxgdb-wrapper'
echo
echo 'to start debugging. Note: while this script runs, you will be asked for the root '
echo 'password of the target ESX host several times while attempting to work on top of '
echo 'scp and ssh.'

while [ "$1" != "" ]; do
case $1 in
        -e )           shift
                       ESX_HOST=$1
                       ;;
        * )            usage
    esac
    shift
done

CAYMAN_ESX_GDB_ROOT=`/bin/rpm -q --qf '%{INSTPREFIXES}\n' \
   vmware-esx-cayman_esx_gdb-1af75dbb095cc2348c35c6708c8b326ac1661974-toolchain`

CAYMAN_PYTHON_ROOT=$(/bin/rpm -q --qf '%{INSTPREFIXES}\n' \
   vmware-esx-cayman_python-99788ba0a9e40ea80ae7b05efb941377abfb31e4-toolchain)

CAYMAN_ESX_NCURSES_ROOT=$(/bin/rpm -q --qf '%{INSTPREFIXES}\n' \
   vmware-esx-cayman_esx_ncurses-9bf45330b538505c6325906c08c4ecf834184b5c-toolchain)

SCRATCHDIR=/tmp/scratchDir
ESX_GDB_WRAPPER_SCRIPT=esx-gdb-wrapper
mkdir -p ${SCRATCHDIR}/{python,ncurses-lib64,esxgdb}
STARTDIR=$(pwd)

if [ ! -d "${CAYMAN_ESX_GDB_ROOT}/esx64-cayman/usr" -o \
     ! -d "${CAYMAN_ESX_NCURSES_ROOT}/usr/lib64" -o \
     ! -d "${CAYMAN_PYTHON_ROOT}/esx64-cayman" ]; then
   echo 'One of the required cayman components was not installed correctly.'
   echo 'Exiting due to error ...'
   exit 1
fi

mkdir -p ${SCRATCHDIR}/esxgdb/{bin,share}
cp -r ${CAYMAN_ESX_GDB_ROOT}/esx64-cayman/usr/bin/gdb ${SCRATCHDIR}/esxgdb/bin/
cp -r ${CAYMAN_ESX_GDB_ROOT}/esx64-cayman/usr/share/* ${SCRATCHDIR}/esxgdb/share/

cp -r ${CAYMAN_ESX_NCURSES_ROOT}/usr/lib64/*.so* ${SCRATCHDIR}/ncurses-lib64/

cp -r ${CAYMAN_PYTHON_ROOT}/esx64-cayman/{bin,lib,share} ${SCRATCHDIR}/python/

tar cf - -C ${SCRATCHDIR} esxgdb ncurses-lib64 python \
   -C ${STARTDIR}/vmkernel-gdb ${ESX_GDB_WRAPPER_SCRIPT} | \
   ssh root@${ESX_HOST} mkdir -p /tmp/gdbDir \; cd /tmp/gdbDir \; tar xf -

if [ $? -ne 0 ]; then
   echo 'The esx gdb files could not be copied over to the target esx host.'
   echo 'Exiting due to error ...'
   exit 1
fi

echo
echo
echo 'This script executed successfully'
echo 'To start debugging, login to the target ESX host and '
echo 'run /tmp/gdbDir/esx-gdb-wrapper'