buildCheckInstall.txt
12-01-2001 Bikle
----------------------

This file displays a script I wrote named checkinstall.

When we build a pkg, Solaris allows us to attach a variety of
shell scripts to that pkg.  These shell scripts are run at
times determined by the name of the script.

Through some reading I discovered that I could create a script named
'checkinstall' (residing in the parent directory of software I intend
to install) which would allow me to check various things about the
host I intended to install Oracle on.  This functionality gives the
operator of the pkgadd utility the option of aborting the pkgadd.

The checkinstall script could be sophisticated enough to provide
information to the pkgadd operator to help him decide if aborting
pkgadd would be a wise decision.

Another piece of information I picked up about pkgadd's interaction
with checkinstall is that pkgadd runs checkinstall as user 'nobody'
which is a very low privilege level.

A copy of the checkinstall I wrote is pasted below:


#! /bin/sh

# checkinstall

# History:
# 08-23-2001 Bikle   Creation
########################################################################
# This script checks that the host is ready for Oracle software.

# Check that /oracle is mounted with at least 3gb of space
# If it is not mounted, exit.
# If it is not large enough, complain.


/bin/df -b /oracle

# Check error status of above command, 0 is a good status
case $? in
  0)
    echo /oracle is mounted;;

  *)
    # The above command issued an error status, deal with it here.
cat <<EOF 

We have a problem with /oracle mount point.  Please do not install
this package now.  We need to get the /oracle mount point fixed.  Come
back later after the /oracle mount point is fixed.

EOF

exit 1;;

esac

# Check the size of /oracle, it needs to be larger than 3gb
oraSize=`/bin/df -b /oracle | /bin/tail -1 | /bin/awk '{print  $2}'`
echo oraSize is $oraSize

if [ $oraSize -lt 3123123 ]; then

cat <<xxyy

We have a problem with /oracle mount point.  
It is too small.  Perhaps it would be better to install this package
after you make sure that /oracle is 3GB or larger.
This only a warning, the package install might work okay.

xxyy

fi

exit 0
## end of checkinstall