lp behaves differently if you cat a file to it

[Helge Blischke]

james_hurford at yahoo.co.uk wrote:
> 
> One of my users has notcied the following behaviour
> 
> The CUPS lp command behaves differently for these two commands:
> 
>    lp -d myprinter filename
>    cat filename | lp -d myprinter
> 
> In the top command the file prints just fine on A4 paper to the printer (HP laser 4100).
> 
> When the second command is used the printer tries to print from a different tray and asks for letter size paper to be used.
> 
> How can I stop this from happening ?
> 
> It needs to work the same both ways as some very expensive EDA software (Cadence) prints using the second command

Please post an URL to a sample file that shows this error
(looking into the source code of CUPS's lp command, this error
seems impossible to me; I rather suspect your expensive application
behaves strangely).

Helge

-- 
Helge Blischke
Softwareentwicklung
SRZ Berlin | Firmengruppe besscom
http://www.srz.de
tel: +49 30 75301-360