This section provides a brief overview of how logon exits let you customize the logon process.

When the TSO/E user enters the LOGON command, the command initiates a terminal session by supplying the system with information that the user specifies on the command, such as user ID, password, and account number. For more information about the LOGON command and its operands, see .

During logon processing, TSO/E invokes installed logon exit routines. These logon exit routines allow you to tailor various stages of the logon process to meet the needs of your installation. Figure 1 illustrates the flow of TSO/E logon exits. The figure shows the division of logon exit processing into four stages: pre-prompt, pre-display, post-display, and post-prompt. These stages are described in the following sections.

Figure 1. TSO/E logon exit flow