Exit points and the network print server

An exit point is a specific point in a system function or program where control can be passed to an installation specified program or programs. These programs are called exit programs because they are providing an exit from the normal processing of the system function or program. The exit programs are usually programs created by users.

The following table contains the IBM-registered exit points that can be used with the network print server.

The functions provided by these exit points are:

• Exit point QIBM_QNPS_ENTRY

  This exit point is used by exit programs that want to control which users can access the network print server.

• Exit point QIBM_QNPS_SPLF

  This exit point is used by exit programs that process spooled files.

Exit programs must be registered with the i5/OS registration facility. Registration allows all users to associate exit programs with the exit points.

i5/OS registration facility and the network print server

The registration facility provides storage and retrieval service for both i5/OS and non-i5/OS exit points and exit programs.

The network print server exit points are already registered with the i5/OS Registration Facility. To use these exit points, you have to register your exit programs with the i5/OS Registration Facility.

Exit programs are registered and deregistered using the following APIs:

• Add Exit Program (QUSADDEP) API

  Adds an exit program entry for a specific exit point.

  Note:
  The network print server exit points do not define exit program data. When you register your exit program, you can provide exit program data. However, the data is not used by the network print server.
• Remove Exit Program (QUSRMVEP) API

  Removes an exit program entry for a specific exit point.

For information and examples on how to register exit programs and exit points, see the Application programming interfaces (APIs) topic collection.

Verifying exit point and exit program registration

The Work with Registration Information (WRKREGINF) command displays information about exit points and exit programs. The command does not add, delete, or change exit points or exit programs within the registration facility. The APIs listed above must be used to initiate a change.