JavaScript is required to for searching.
Skip Navigation Links
Exit Print View
Application Packaging Developer's Guide
search filter icon
search icon

Document Information

Preface

1.  Designing a Package

2.  Building a Package

3.  Enhancing the Functionality of a Package (Tasks)

4.  Verifying and Transferring a Package

5.  Case Studies of Package Creation

Soliciting Input From the Administrator

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The request Script

Creating a File at Installation and Saving It During Removal

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The space File

The i.admin Class Action Script

The r.cfgdata Removal Script

Defining Package Compatibilities and Dependencies

Techniques

Approach

Case Study Files

The pkginfo File

The copyright File

The compver File

The depend File

Modifying a File by Using Standard Classes and Class Action Scripts

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The i.inittab Installation Class Action Script

The r.inittab Removal Class Action Script

The inittab File

Modifying a File by Using the sed Class and a postinstall Script

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The sed Class Action Script (/etc/inittab)

The postinstall Script

Modifying a File by Using The build Class

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The Build File

Modifying crontab Files During Installation

Techniques

Approach

Case Study Files

The pkginfo Command

The prototype File

The i.cron Installation Class Action Script

The r.cron Removal Class Action Script

crontab File #1

crontab File #2

Installing and Removing a Driver With Procedure Scripts

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The request Script

The postinstall Script

The preremove Script

Installing a Driver by Using the sed Class and Procedure Scripts

Techniques

Approach

Case Study Files

The pkginfo File

The prototype File

The sed Class Action Script (/etc/devlink.tab)

The postinstall Installation Script

The preremove Removal Script

The copyright File

6.  Advanced Techniques for Creating Packages

Glossary

Index

Modifying a File by Using Standard Classes and Class Action Scripts

This case study modifies an existing file during package installation using standard classes and class action scripts. It uses one of three modification methods. The other two methods are described in Modifying a File by Using the sed Class and a postinstall Script and Modifying a File by Using The build Class. The file modified is /etc/inittab.

Techniques

This case study demonstrates how to use installation and removal class action scripts. For more information, see Writing Class Action Scripts.

Approach

To modify /etc/inittab during installation, using classes and class action scripts, you must complete the following tasks:

This case study is more complicated than the next one; see Modifying a File by Using the sed Class and a postinstall Script. Instead of providing two files, three are needed and the delivered /etc/inittab file is actually just a place holder containing a fragment of the entry to be inserted. This could have been placed into the i.inittab file except that the pkgadd command must have a file to pass to the i.inittab file. Also, the removal procedure must be placed into a separate file (r.inittab). While this method works fine, it is best reserved for cases involving very complicated installations of multiple files. See Modifying crontab Files During Installation.

The sed program used in Modifying a File by Using the sed Class and a postinstall Script supports multiple package instances since the comment at the end of the inittab entry is based on package instance. The case study in Modifying a File by Using The build Class shows a more streamlined approach to editing /etc/inittab during installation.

Case Study Files

The pkginfo File
PKG=case5
NAME=Case Study #5
CATEGORY=applications
BASEDIR=/opt
ARCH=SPARC
VERSION=Version 1d05
CLASSES=inittab
The prototype File
i pkginfo
i i.inittab
i r.inittab
e inittab /etc/inittab ? ? ?
The i.inittab Installation Class Action Script
# PKGINST parameter provided by installation service
while read src dest
do
# remove all entries from the table that
# associated with this PKGINST
sed -e "/^[^:]*:[^:]*:[^:]*:[^#]*#$PKGINST$/d" $dest >
/tmp/$$itab ||
exit 2
sed -e "s/$/#$PKGINST" $src >> /tmp/$$itab ||
exit 2
mv /tmp/$$itab $dest ||
exit 2
done
if [ "$1" = ENDOFCLASS ]
then
/sbin/init q ||
exit 2
fi
exit 0
The r.inittab Removal Class Action Script
# PKGINST parameter provided by installation service
while read src dest
do
# remove all entries from the table that
# are associated with this PKGINST
sed -e "/^[^:]*:[^:]*:[^:]*:[^#]*#$PKGINST$/d" $dest >
/tmp/$$itab ||
exit 2
mv /tmp/$$itab $dest ||
exit 2
done
/sbin/init q ||
exit 2
exit 0
The inittab File
rb:023456:wait:/usr/robot/bin/setup