3.16 Output and Input to/from the standard streams

When the LispWorks IDE starts it sets the follow variables:

• hcl:*background-output* to mp:*background-standard-output*.
• hcl:*background-input* to a stream that always returns EOF.
• hcl:*background-query-io* to a stream that interacts with the user using CAPI prompters.

hcl:*background-output* is the default destination of cl:*standard-output*, cl:*trace-output* and cl:*error-output*.

hcl:*background-input* is the default source cl:*standard-input*.

hcl:*background-query-io* is the default for cl:*query-io* and cl:*debug-io*.

The output sent to mp:*background-standard-output* can be viewed in the Output Browser tool and in the Output tab of Editor and Listener tools. See the entry for hcl:*background-output* in the LispWorks® User Guide and Reference Manual for more details.