7a. Create a Set Installation Package

This case study shows an example of creating a Set Installation Package (SIP) that is used to control the installation of a set of packages.

Techniques

This case study shows examples of the following:

• creating a setinfo(F) file.

• creating a request script that processes set member packages selection and type of installation (custom and default, if applicable)

• including the set member packages' request and default response files in the prototype(F) file as file type i files, if any, as part the SIP so that all interaction with the installer is done only during SIP processing

• using the preinstall script to pass the selected packages back to pkgadd(ADM)

Approach

1. Create a request script script to ask the installer how the set should be installed.

2. Should default installation be performed on this set?

   When the answer is yes, if any of the set's member packages require interaction and if default responses for that interaction have been provided, install the set using the default responses.

   When the answer is no, for each package in the set, prompt as to whether this package should be installed.

   When the answer is yes, if it is interactive (the package has a request script), should default installation of the package be performed?

   If yes, use the default response file.

   If no, execute the package's request script to obtain the responses.

3. When the request script has completed, the PKGLIST variable should contain the list of selected set member packages that will be installed on the system. At this time:

   • pkgadd(ADM) runs the SIP's preinstall script which places the selected set member packages for installation ($PKGLIST) into the setlist file referenced using the $SETLIST variable.

   • pkgadd then reads the setlist file and inserts the packages listed there into the list of packages to be installed on the system.

   • As each of these packages is processed, if the package is interactive, pkgadd uses the response file created earlier so that no prompting for user input occurs except during SIP processing.

setinfo file

   # Format for the setinfo file.  Field separator is: <tab>
   # pkg	 parts	default	category	package_name
   # abbr		y/n
   

   pkgw	1	y	system		Package W
   pkgx	1	y	system		Package X
   pkgy	2	n	system		Package Y
   pkgz	1	y	system		Package Y

prototype file

   # set packaging files
   i pkginfo
   i preinstall
   i request
   i setinfo
   i copyright
   

   i pkgw/request=pkgw.request
   i pkgw/response=pkgw.response
   i pkgx/request=pkgx.request
   i pkgx/response=pkgx.response

preinstall script file

   for PKG in $PKGLIST
   do
   	echo "$PKG" >>$SETLIST
   done

request script file

   # If <DELETE> is pressed, make sure we exit 77 so pkgadd knows
   # no packages were selected for installation.  In this case,
   # pkgadd will also not install the SIP itself.
   trap 'EXITCODE=77; exit' 2
   trap 'exit $EXITCODE' 0
   

   while read pkginst parts default category package_name
   do
   	echo $pkginst >>/tmp/order$$
   	if [ "$default" = "y" ]
   	then
   		echo $pkginst >>/tmp/req$$
   	else
   		echo $pkginst >>/tmp/opt$$
   	fi
   done <$SETINFO
   

   REQUIRED=`cat /tmp/req$$ 2>/dev/null`
   OPTIONAL=`cat /tmp/opt$$ 2>/dev/null`
   ORDER=`cat /tmp/order$$ 2>/dev/null`
   rm -f /tmp/opt$$ /tmp/req$$ /tmp/order$$
   	
   HELPMSG="Enter 'y' to run default set installation or enter
   'n' to run custom set installation."
   

   PROMPT="Do you want to run default set installation?"
   

   ANS=`ckyorn -d y -p "$PROMPT" -h "$HELPMSG"`|| exit $?
   

   if [ "$ANS" = "y" ]
   then
   	# Default installation
   	for PKG in $REQUIRED
   	do
   		PKGLIST="$PKGLIST $PKG"
   		if [ -f $REQDIR/$PKG/response ]
   		then
   			cp $REQDIR/$PKG/response $RESPDIR/$PKG
   		fi
   	done
   	echo "PKGLIST=$PKGLIST" >> $1
   else
   	# Custom installation of required packages
   	for PKG in $REQUIRED
   	do
   		PKGLIST="$PKGLIST $PKG"
   		if [ -f $REQDIR/$PKG/request ]
   		then
   			PROMPT="Do you want default installation for $PKG?"
   			RANS=`ckyorn -d y -p "$PROMPT" -h "$HELPMSG"` || exit $?
   			if [ "$RANS" = "y" ]
   			then
   				cp $REQDIR/$PKG/request $RESPDIR/$PKG
   			else
   				sh $REQDIR/$PKG/request $RESPDIR/$PKG
   			fi
   		fi
   	done
   

   	# Select which optional packages in set are to be installed
   	for PKG in $OPTIONAL
   	do
   	HELPMSG="Enter 'y' to install $PKG as part of this set
   	installation or 'n' to skip installation."
   	PROMPT="Do you want to install $PKG?"
   	PANS=`ckyorn -d y -p "$PROMPT" -h "$HELPMSG"` || exit $?
   

   	if [ "$PANS" = "y" -o "$PANS" = "" ]
   	then
   		PKGLIST="$PKGLIST $PKG"
   		if [ -f $REQDIR/$PKG/request ]
   		then
   		   PROMPT="Do you want default installation for $PKG?"
   		   RANS=`ckyorn -d y -p "$PROMPT" -h "$HELPMSG"` || exit $?
   		   if [ "$RANS" = "y" ]
   		   then
   			   cp $REQDIR/$PKG/request $RESPDIR/$PKG
   		   else
   			   sh $REQDIR/$PKG/request $RESPDIR/$PKG
   		   fi
   		fi
   	fi
   	done
   	echo "PKGLIST=$PKGLIST" >> $1
   fi
   

   if [ "$PKGLIST" = "" ]
   then
   	EXITCODE=77
   fi
   export SETPKGS