[hpoj-devel] (no subject)

[Talukdar, N. <nip...@di...>]

LPR/LPD problem 
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I have a problem. The lpd on a HP LaserJet 8150  keeps on sending reply of
one octet of 0 or a -1. 
Now suppose somebody presses  the CANCEL JOB button on the printer , then
how will the LPR program 
will know that the PRINTER is cancelling the jobs. I saw that in such a case
the connection to the LPD 
of the PRINTER doesn't get closed and the LPR in the local system keeps
sending the data happily and 
the LPD of printer also keeps on accepting the data. 
   While with  port 9100 of the printer we can actually know the physical
state of the printer like PAPER JAM , 
 CANCEL JOB BUTTON PRESSED  etc , there is no way to know it through LPR/LPD
as far as I know. 

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How can LPR know "CANCEL JOB BUTTON" is pressed in the printer ??? 

If somebody helps me , I will be sincerely grateful to him all my life 
and may be even after death when I will be in paradise. 

PLEASE HELP ME .... PLEASE HELP ME .... PLEASE HELP ME .... 



Nipun