Defining Package Compatibilities and Dependencies

The package in this case study uses optional information files to define package compatibilities and dependencies, and to present a copyright message during installation.

Techniques

This case study demonstrates the following techniques:

• Using the copyright file

• Using the compver file

• Using the depend file

For more information on these files, see Creating Information Files.

Approach

To meet the requirements in the description, you must:

• Create a copyright file.

  A copyright file contains the ASCII text of a copyright message. The message shown in the sample file is displayed on the screen during package installation.

• Create a compver file.

  The pkginfo file shown in the next figure defines this package version as version 3.0. The compver file defines version 3.0 as being compatible with versions 2.3, 2.2, 2.1, 2.1.1, 2.1.3 and 1.7.

• Create a depend file.

  Files listed in a depend file must already be installed on the system when a package is installed. The example file has 11 packages which must already be on the system at installation time.

Case Study Files

The pkginfo File

PKG=case3
NAME=Case Study #3
CATEGORY=application
BASEDIR=/opt
ARCH=SPARC
VERSION=Version 3.0
CLASSES=none

The copyright File

Copyright (c) 1999 company_name
All Rights Reserved.
THIS PACKAGE CONTAINS UNPUBLISHED PROPRIETARY SOURCE CODE OF
company_name.
The copyright notice above does not evidence any
actual or intended publication of such source code

The compver File

Version 3.0
Version 2.3
Version 2.2
Version 2.1
Version 2.1.1
Version 2.1.3
Version 1.7

The depend File

P acu Advanced C Utilities
Issue 4 Version 1
P cc C Programming Language
Issue 4 Version 1
P dfm Directory and File Management Utilities
P ed Editing Utilities
P esg Extended Software Generation Utilities
Issue 4 Version 1
P graph Graphics Utilities
P rfs Remote File Sharing Utilities
Issue 1 Version 1
P rx Remote Execution Utilities
P sgs Software Generation Utilities
Issue 4 Version 1
P shell Shell Programming Utilities
P sys System Header Files
Release 3.1