#! /bin/ksh
#
# installation script for gpt-1.0 Globus Grid Packaging Technology
#

if [[ $1 = "" ]]
  then
  kit_location="`/usr/bin/dirname $0`/.."
  else
  kit_location=$1
fi
  
# Because the update procedure potentially (very high likelyhood)
# needs to replace shared libraries or other package dependent rpm's
# (temporarily breaking packages), we can only perform those upgrades
# by making use of the --nodeps flag, otherwhise RPM will refuse to
# install them. The --nodeps flag should only be necessary while we're
# called via the upgrade-packages.ksh script. It is quite possible
# that this particular package does not require the --nodeps flag
# during the upgrade procedure, but rather than chance an oversight
# (it is difficult to test all permutations as the upgrade procedure
# is performed on a random list), the --nodeps flag is employed for
# virtually all packages during the upgrade step.
if [[ $3 = "Upgrade" ]]
  then
  depsflag="--nodeps"
fi

#
#  First let's make sure we have superuser privilege
#
if [ `whoami` != "root" ]
       then
       echo "You must be superuser to run this script"
       exit 1
fi

#
# We need to ensure that it's a V5.1 or V5.1A system...
#
OS_VERSION=`/usr/sbin/sizer -v | cut -d" " -f 4 | cut -b 2-5`

if [[ $OS_VERSION < "5.1" ]]
  then 
  echo "You need Tru64 UNIX V5.1 to install any of the"
  echo "rpm kits from this CD-ROM!"
  echo "Please refer to the /mnt/README file for instructions"
  echo
  exit 1
fi

# let's make sure that there's a /tmp directory

if [[ ! -d /tmp ]]
   then
   echo "directory /tmp was not found."
   echo "This script requires a writable /tmp directory"
   echo "Exiting gpt-1.0 installation script..."
   echo
   exit 1
fi

if [[ ! -w /usr/tmp ]]
   then
   echo "directory /tmp is not writable."
   echo "This script requires a writable /tmp directory"
   echo "Exiting gpt-1.0 installation script..."
   echo
   exit 1
fi

# let's make sure that there's a /usr/local directory

if [[ ! -d /usr/local ]]
   then
   echo "directory /usr/local was not found."
   echo "rather than create a /usr/local directory for you,"
   echo "you are advised to mount a separate (from /usr) 800Mb+ file system"
   echo "at /usr/local ."
   echo "Exiting gpt-1.0 installation script..."
   echo
   exit 1
fi

if [[ ! -w /usr/local ]]
   then
   echo "directory /usr/local is not writable."
   echo "Exiting gpt-1.0 installation script..."
   echo
   exit 1
fi

# Need to ensure that /usr/local is not an nfs mounted file system:
/sbin/mount -t nfs | awk '$3=="/usr/local"{exit 1}'
if [ $? != 0 ]; then
   echo "This script cannot install this kit to an NFS mounted file system."
   echo "Exiting gpt-1.0 installation script..."
   echo 
   exit 1
fi

# We don't want to look anywhere other than /usr/local/globus

  echo "Checking if gpt-1.0 is already installed..."
  if [[ -f /usr/local/globus/sbin/globus-install ]]
  then   
  echo
  echo "gpt-1.0 is already installed on this system."
  echo "Exiting gpt-1.0 installation script..."
  echo
  exit
  fi           

#
# Now let's check for required free space.
# gpt-1.0   requires       7110656 bytes in /tmp
# gpt-1.0   requires        843776 bytes in /usr/local
  
  space_avail="`/sbin/df /tmp | tail -1 | awk '{print $4}'`"
  let  "space_avail=space_avail*512"
  if (( $space_avail < 7110656 ))
   then
   echo 
   echo "The amount of required free space in /tmp to build and install"
   echo "gpt-1.0 on this system is: 7110656 bytes"
   echo
   echo "Sorry, you don't have enough space in /tmp to install gpt-1.0"
   echo
   echo "Exiting gpt-1.0 installation script..."
   echo
   exit 1
   else
   Required_space=843776
   space_avail="`/sbin/df /usr/local | tail -1 | awk '{print $4}'`"
   let  "space_avail=space_avail*512"
      echo "The amount of required free space to install gpt-1.0"
      echo "on this system is: $Required_space bytes, leaving you with"
 
      let "Remaining_space=$space_avail-$Required_space"
 
      echo "$Remaining_space bytes free in your /usr/local file system"
      echo

      echo "Do you want to continue? [y/n]: \c"
      read answer
      echo
  	if [ "$answer" = "n" ] || [ "$answer" = "N" ]
  	  then exit
  	fi
  	if [ "$answer" != "y" -a "$answer" != "Y" ]
  	  then
  	  echo "Response $answer is not recognized, "
  	  echo "Exiting gpt-1.0 installation script..."
  	  echo
  	  exit 1
  	fi
   fi
#
# Building and Installing gpt-1.0 kit...
#
  echo
  echo "NOTE: This script will now unpack the gpt-1.0 sources in /tmp"
  echo "and build and install the software."
  echo "Please be patient..."
  echo
  
  cd /tmp/
  gzip -dc $kit_location/GLOBUS/gpt-1.0.tar.gz | tar xf -
  cd gpt-1.0
  GLOBUS_LOCATION=/usr/local/globus; export GLOBUS_LOCATION
  GPT_LOCATION=/usr/local/globus; export GPT_LOCATION  
  CC=cc ./build_gpt

  if [[ -f /usr/local/globus/sbin/globus-install ]]
  then   
  echo
  echo "gpt-1.0 is now installed on this system."
  echo
  echo "       -----------------------------------------------------------"
  echo
  else    
  echo
  echo "An unknown ERROR was encountered. This script FAILED to"
  echo "install gpt-1.0 on your system !!"
  echo 
  echo
  exit
  fi 
    
  echo
  echo "It is recommended that you allow this script to remove"
  echo "the /tmp/gpt-1.0 source directory."
  echo  
  echo "Do you want to remove /tmp/gpt-1.0 ? [y/n]: \c"
      read answer
      echo
  	if [ "$answer" = "n" ] || [ "$answer" = "N" ]
  	  then exit
  	fi
  	if [ "$answer" != "y" -a "$answer" != "Y" ]
  	  then
  	  echo "Response $answer is not recognized, "
  	  echo "Exiting gpt-1.0 installation script..."
  	  echo
  	  exit 1
  	fi   

  cd /tmp
  rm -r /tmp/gpt-1.0

  echo  
  echo "the /tmp/gpt-1.0 directory has been removed."
  echo
  exit
  
# Klaus2> df /tmp
#Filesystem        512-blocks        Used   Available Capacity  Mounted on
#root_domain#root     1160528      160030      989584    14%    /
#Klaus2> gzip -dc ~/gpt-1.0.tar.gz| tar xf -
# AFTER ./build_gpt
# df /tmp
#Filesystem        512-blocks        Used   Available Capacity  Mounted on
#root_domain#root     1160528      174142      975696    16%    /
#
#before ./build_gpt
#$ df /usr/local
#Filesystem      512-blocks        Used   Available Capacity  Mounted on
#usr_domain#usr    18194128     8769928     9283168    49%    /usr
#
#after ./build_gpt
# df /usr/local
#Filesystem      512-blocks        Used   Available Capacity  Mounted on
#usr_domain#usr    18194128     8772340     9281520    49%    /usr