ASP.NET Web PDF Document Viewer/Editor Control Library

In order to connect with SYSDBA or SYSOPER privileges, you must add your username and password to the iSQL*Plus authentication file for the iSQL*Plus Application Server. Java Authentication and Authorization Service (JAAS) is a package that augments Java 2 security and supports userbased authentication and access control. Oracle s JAAS implementation is known as the JAAS Provider or JAZN (an abbreviation of Java authorization). You can configure the JAAS Provider with either an XML repository (JAZN-XML) or the Oracle Internet Directory (OID). In this section, I show how to set up the iSQL*Plus DBA URL to use the XML-based JAAS provider. In order to use the JAAS Provider, you need to use two configuration files jazn.xml and jazn-data.xml. In the jazn.xml file, you specify the provider type, either XML or LDAP/OID. You use the jazn-data.xml file when you specify the XML provider type. This file will contain JAAS data on users, roles, policies, and login modules. To set up the iSQL*Plus DBA URL, you need to start the JAZN shell, create authorized users, grant the WEBDBA role to new users, and test the new DBA access. The following sections describe these steps.

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Although you can create and manage users from the command line, it is laborious to do so, and you re better off invoking the JAZN shell. You must start the JAZN shell from the following directory: $ORACLE_HOME/oc4j/j2ee/isqlplus/application-deployments/isqlplus. Before you invoke the JAZN shell, make sure that the iSQL*Plus server is running. If it isn t, start it using the isqlplusctl utility described in the Starting and Stopping the iSQL*Plus Application Server section earlier in this chapter.

First use the cd command to move to the right directory. $ cd $ORACLE_HOME/oc4j/j2ee/isqlplus/application-deployments/isqlplus To invoke the JAZN shell, use the following command, all on the same line: $ $JAVA_HOME/bin/java -Djava.security.properties= $ORACLE_HOME/sqlplus/admin/iplus/provider -jar $ORACLE_HOME /oc4j/j2ee/home/jazn.jar -user "iSQL*Plus DBA/admin" -password admin_password -shell In the preceding command, you need to replace admin_password with the actual password ( welcome is the default password) for the iSQL*Plus DBA realm administrator user, admin. Once you run the previous command, you ll be in the JAZN shell, as shown here: JAZN:> You need to first change the default password of the admin user for the iSQL*Plus DBA environment, by using the following command: JAZN:> SETPASSWD "iSQL*Plus DBA" "iSQL*Plus DBA/admin" welcome newpass1 In the previous command, note that iSQL*Plus DBA/admin is the admin user for the iSQL*Plus DBA environment, whose default password, as I mentioned earlier, is welcome . The SETPASSWD command changes the password to newpass1.

Once you invoke the JAZN shell, you need to create the users that will be granted access to the iSQL*Plus DBA URL. Here s how you do this: JAZN:> ADDUSER "iSQL*Plus DBA" salapati sammyy1 The previous command creates a new user, salapati, who can connect using the iSQL*Plus DBA URL. Since the command doesn t indicate the status of your request to create the new user, you need to check if the new user has been created by using the following command: JAZN:> LISTUSERS "iSQL*Plus DBA" salapati admin JAZN> You find two users the admin user that you created originally, and the salapati user that you created subsequently. If you wish to remove any of the new users you created, you can use the REMUSER command, as shown here: JAZN> REMUSER "iSQL*Plus DBA" username

First the data originally piped to the while read loop is sent to a temporary file. The file is then redirected into the back end of the loop. This functions the same way as the original code, but allows the variables populated within the loop to remain usable once the loop completes. 8 offers another example of this technique. The following is a modified form of the previous example:

// when this application is built with /clr, GetLastError will be 0, // otherwise it will be 0x57! printf("Indirect call caused error code 0x%X\n", GetLastError()); } When this application is built with /clr, the output will be as follows: Direct call caused error code 0x57 Indirect call caused error code 0x0 If you face this problem in your code, you must move the indirect function call and the call to GetLastError to native code. This will ensure that neither the native function nor the GetLastError function will be called via a thunk, and the correct GetLastError value will be returned.