Technical Note PR13

Spooler Queries?

CONTENTS Introduction References Downloadables

[Jul 01 1987]

Introduction

When the LaserShare spooler is on an AppleTalk network, it acts like a LaserWriter-type device, which can be chosen and communicated with much like a real LaserWriter. Some applications, however, must communicate with a LaserWriter directly, not a spooler. If this is true for your application, you can check whether you are actually talking to a real LaserWriter by sending to the LaserWriter the following query:

    %!PS-Adobe-1.2 Query
    %%Title: Query to Spooler/Non-Spooler status
    %%?BeginSpoolerQuery
    (0) = flush
    %%?EndSpoolerQuery 1

(The query has to be sent using the Printer Access Protocol (PAP). The object code for PAP is available from Licensing.) If the string returned begins with a "%%" then it is a status string, and you can ignore it and wait for another string. If the LaserWriter is actually a LaserShare spooler, then the string that is returned will be "1." If the LaserWriter is a real LaserWriter then the string returned will be "0."

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References

PostScript Language Reference Manual

Adobe Systems Document Structuring Conventions

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Downloadables