Programmatically Determining Whether the Current User Is an Administrator or Root

Title

Summary

This article provides sample Java code demonstrating how to programmatically determine whether the current user running the installation is either an administrator on Windows or root on Unix / Linux

Synopsis

This article provides sample Java code demonstrating how to programmatically determine whether the current user running the installation is either an administrator on Windows or root on Unix / Linux. The sample Java code implements a Java class as a Custom Code Rule in InstallAnywhere.

Discussion

The Java code first sets a boolean variable to false as a default value and then gets a handle on the SecurityService through a ruleProxy object. Next, the Java code calls the isCurrentUserAdmin() method, which detects whether the current user is an administrator on Windows or root on Unix / Linux. Finally, the Java code returns the boolean result from the call to the isCurrentUserAdmin() method. If the current user is an Administrator on Windows or root on Unix, the Java code returns true. Otherwise, it returns false.

Compile the source code using the Java compiler and ensure that the IAClasses.zip file (in the InstallAnywhere home directory) and all the JAR files in the <InstallAnywhereHome>\resource\services directory are in the classpath. Place the compiler output (a Java class file) in a JAR file using the Java jar command. Add an Evaluate Custom Rule Action to your project that points to that JAR file and the respective Java class. If you would like the evaluation of the rule to take place before the Pre-Install Task, add the Evaluate Custom Rule Action under Project > Rules > Installer Rules by clicking the Add Rule button.

NOTE: In addition, check the "Add service support for custom code" checkbox found under Project > Java for InstallAnywhere versions from InstallAnywhere 2009 up to InstallAnywhere 2012 with SP1. With the redesign of the UI, this checkbox is under the Project View > JVM Settings View > General Settings Tab for InstallAnywhere 2013 and later. Checking this checkbox ensures that the InstallShield MultiPlatform API services are built into the installer and made available at runtime.

Code:

import com.installshield.wizard.service.security.SecurityService;
import com.zerog.ia.api.pub.*;

public class IsCurrentUserAdmin extends CustomCodeRule

{

public boolean evaluateRule()

{
boolean isAdmin = false;

try

{

SecurityService sservice = (SecurityService) ruleProxy.getService(SecurityService.class);

isAdmin = sservice.isCurrentUserAdmin();

}

catch(Exception e)

{

e.printStackTrace();

}

return isAdmin;

}
}

Related KB Articles

Q113344

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Case id: 00001065