cups cupsBackChannelRead

velupillai kalyani.vel at
Thu Jan 24 08:34:12 PST 2008

I wrote a raster filter. Now i want The filter be able to request some information from the printer. so i use cupsBackChannelRead (i tried cups 1.2.10 then 1.3.5).but it failed to read and return -1.i noticed in /var/log/cups/error the sentence "Received 1 bytes data from backchannel".Can anyone help me? thanks in advance.

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