LISTBC, OPERATOR SEND, and SEND commands

Users issue the SEND command to send messages to other users. Users who are authorized to use the OPERATOR command can issue the SEND subcommand to send messages to users. The SEND command and the OPERATOR SEND subcommand may store messages in the broadcast data set depending on the operands the user specifies. Users issue the LISTBC command to retrieve messages that SEND stores.

By default, SEND and OPERATOR SEND store messages in the broadcast data set and LISTBC retrieves stored messages from this data set. You can define individual user logs that SEND, OPERATOR SEND, and LISTBC use to store and retrieve messages instead of using the broadcast data set.

To customize SEND, OPERATOR SEND, and LISTBC processing, you can use SYS1.PARMLIB member IKJTSOxx to define installation defaults. You can:

Specify whether users can use the SEND command
Specify whether users who are authorized to use the OPERATOR command can use the SEND subcommand
Specify whether user logs are used and name those logs
With RACF® installed, specify whether security labels (SECLABELs) will be used to protect messages

To further tailor the process, you can write exits for LISTBC, OPERATOR SEND, and SEND. Using these exits, you can:

Provide additional restrictions on who can or cannot send messages
Override defaults that you previously set in IKJTSOxx
Tailor the use of user logs
Change operands that users specify on LISTBC, OPERATOR SEND, or SEND
Change message text or format messages

For more information, see Customizing how users send and retrieve messages.