#!/bin/sh
#___INFO__MARK_BEGIN__
##########################################################################
#
#  The Contents of this file are made available subject to the terms of
#  the Sun Industry Standards Source License Version 1.2
#
#  Sun Microsystems Inc., March, 2001
#
#
#  Sun Industry Standards Source License Version 1.2
#  =================================================
#  The contents of this file are subject to the Sun Industry Standards
#  Source License Version 1.2 (the "License"); You may not use this file
#  except in compliance with the License. You may obtain a copy of the
#  License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
#
#  Software provided under this License is provided on an "AS IS" basis,
#  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
#  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
#  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
#  See the License for the specific provisions governing your rights and
#  obligations concerning the Software.
#
#  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
#
#  Copyright: 2001 by Sun Microsystems, Inc.
#
#  All Rights Reserved.
#
##########################################################################
#___INFO__MARK_END__

# arguments
IS_BDB=$1
IS_QMASTER=$2
IS_SHADOW=$3
IS_EXECD=$4

SPOOLING_METHOD="${cfg.spooling.method}"
if [ "$SPOOLING_METHOD" = "none" ]; then
   SPOOLING_METHOD="berkeleydb"
fi
DB_SPOOLING_SERVER="${cfg.db.spooling.server}"

# exit code for run fuctions
EXIT_CODE=0

ADMINUSER="${cfg.admin.user}"
if [ "${host.arch}" = "win32-x86" ]; then
   HOSTNAME=`hostname | tr "[a-z]" "[A-Z]"`
   ADMINUSER="$HOSTNAME+$ADMINUSER"
fi

# run the command as admin user
RunAsAdmin()
{
   "${cfg.sge.root}"/utilbin/"${host.arch}"/adminrun $ADMINUSER $@
   EXIT_CODE=$?
}

# run the command as executor then if it fails as admin user
RunAsBoth()
{
   ALL="$@"
   $ALL
   EXIT_CODE=$?
   if [ $EXIT_CODE -ne 0 -a "${user.name}" != "${cfg.admin.user}" ]; then
      RunAsAdmin $ALL      
   fi
}

# returns with the first existing parent directory in the hierarchy
GetFirstExistingDir()
{
  dir="$1"

  if [ ! -d "$dir" ]; then
     while [ ! -d "$dir" ]; do
        tmp_dir=`dirname "$dir"`
        dir="$tmp_dir"
     done
  fi
  echo "$dir"
}

#Genaretes output from the exit code and terminates the script
# $1 ... EXIT_CODE
Exit()
{
   EXIT_CODE=$1
   echo "___EXIT_CODE_${EXIT_CODE}___"
   exit $EXIT_CODE
}

# checks whether the executor or the admin user has write permission on
# the given directory even if the directory does not exist.
IsDirWritable()
{
   dir=`GetFirstExistingDir "$1"`
   RunAsBoth test -w "$dir"
   #TODO: Even when rwx, the dir can be mounted as read-only => permission denied during installation
}

# checks whether the admin user has write permission on
# the given directory even if the directory does not exist.
IsDirWritableByAdminUser()
{
   dir=`GetFirstExistingDir "$1"`
   RunAsAdmin test -w "$dir"
}

#Test that admin user is availabe on the remote host. The installation will need it at some point!
RunAsAdmin echo
if [ $EXIT_CODE -ne 0 ]; then
   Exit 60  # admin user not known on this host
fi

# if Berkeley db server host
if [ "$IS_BDB" = true ]; then
   # if BDB server spooling is enabled check write permission on BDB spool dir
   if [ "$SPOOLING_METHOD" = "berkeleydb" -a "$DB_SPOOLING_SERVER" != "none"  ]; then
      if [ -d "${cfg.db.spooling.dir}" ]; then
         Exit 50
      fi
      IsDirWritable "${cfg.db.spooling.dir}"
      if [ $EXIT_CODE -ne 0 ]; then
         Exit 51
      fi
   fi
fi

# if qmaster host
if [ "$IS_QMASTER" = true ]; then
   # TODO check qmaster port usage

   # check write permission on qmaster spool dir
   IsDirWritable "${cfg.qmaster.spool.dir}"
   if [ $EXIT_CODE -ne 0 ]; then
      Exit 20
   fi

   # check write permission on global execd spool dir
   IsDirWritable "${cfg.execd.spool.dir}"
   if [ $EXIT_CODE -ne 0 ]; then
      Exit 21
   fi

   # if JMX is enabled check configuration
   USE_JMX="${add.sge.jmx}"
   if [ "$USE_JMX" = true ]; then
      # TODO check JMX port usage

      # check write permission on JMX keystore dir
      IsDirWritable "${cfg.sge.jmx.ssl.keystore}"
      if [ $EXIT_CODE -ne 0 ]; then
         Exit 22
      fi

      jvm_lib_path="${cfg.sge.jvm.lib.path}"
      if [ -z "${cfg.sge.jvm.lib.path}" -o ! -f "${cfg.sge.jvm.lib.path}" ]; then
         #Detecting JVM will only verify it will be detected during the installation
         SGE_ROOT="${cfg.sge.root}" ; export SGE_ROOT
         . $SGE_ROOT/util/install_modules/inst_qmaster.sh
         HaveSuitableJavaBin "1.5.0" "jvm"
         if [ -z "$jvm_lib_path" ]; then
            Exit 23
         fi
      fi

      # check JVM library validity
      if [ -n "$jvm_lib_path" ]; then
         "${cfg.sge.root}"/utilbin/"${host.arch}"/valid_jvmlib "$jvm_lib_path"
         if [ $? -ne 0 ]; then
            Exit 24
         fi
      fi
  fi

   # if local BDB spooling is enabled ...
   if [ "$SPOOLING_METHOD" = "berkeleydb" -a "$DB_SPOOLING_SERVER" = "none"  ]; then
      # ...fail if exists
      if [ -d "${cfg.db.spooling.dir}" ]; then
         Exit 25
      fi

      # ...fail if FSType equals 'nfs'
      FIRST_EXISTING_DIR=`GetFirstExistingDir "${cfg.db.spooling.dir}"`
      fstype=`"${cfg.sge.root}"/utilbin/"${host.arch}"/fstype $FIRST_EXISTING_DIR`
      if [ "$fstype" = "nfs" ]; then
         Exit 26
      fi

      # ...check write permission on BDB spool dir
      IsDirWritable "${cfg.db.spooling.dir}"
      if [ $EXIT_CODE -ne 0 ]; then
         Exit 27
      fi
   fi
fi

# if shadowd host
if [ "$IS_SHADOW" = true ]; then
   # TODO check whether to start jmx
   # check JVM library
   if [ "${add.sge.jmx}" = "true" ]; then
      if [ -z "${cfg.sge.jvm.lib.path}" -o ! -f "${cfg.sge.jvm.lib.path}" ]; then
         #Detecting JVM will only verify it will be detected during the installation
         SGE_ROOT="${cfg.sge.root}" ; export SGE_ROOT
         . $SGE_ROOT/util/install_modules/inst_qmaster.sh
         HaveSuitableJavaBin "1.5.0" "jvm"
         if [ -z "$jvm_lib_path" ]; then
            Exit 30
         fi
      else
         # Need to do validity check only if not autodetected (already doen there)
         "${cfg.sge.root}"/utilbin/"${host.arch}"/valid_jvmlib "${cfg.sge.jvm.lib.path}"
         if [ $? -ne 0 ]; then
            Exit 31
         fi
      fi
   fi
fi

# if execd host
if [ "$IS_EXECD" = true ]; then
   # TODO check execd port usage

   # check write permission on local execd spool dir
   if [ -n "${cfg.exec.spool.dir.local}" ]; then
      IsDirWritable "${cfg.exec.spool.dir.local}"
   else
      # Need to check both install and admin users, since root can create whatever he wants
      IsDirWritable "${cfg.execd.spool.dir}"
   fi

   if [ $EXIT_CODE -ne 0 ]; then
      Exit 40
   fi

fi

Exit 0