Re: [hylafax-users] HylaFAX and PCL

[Jean-Pierre Radley <jpr@xxxxxxx>]

Lee Howard typed (on Tue, Jan 22, 2008 at 05:09:13PM -0800):

> Second (the more significant issue), it appears the there is no sure-fire 
> way to identify a PCL file.  You can see from your system's "magic" file 
> (often /usr/share/magic) that PCL file detection is a bit of a 
> best-guess/probability approach... and it's further-muddied by HP's PJL 
> wrappers around both PCL and non-PCL (usually Postscript) data and the 
> likelihood that users will want to process PJL-PCL files as if they were 
> PCL (because GhostPDL seems to usually support that).  So we need to take a 
> look at how to type the PCL files you'll be sending, at least.  That typing 
> information will need to be added to typerules (for the client-side) as 
> well as hfaxd/FileSystem.c++ (for the server-side).  Once we can reliably 
> type the PCL files that you'll be sending then this issue should not impact 
> you any longer.  (I am told that the <ESC>E<ESC> is the most-reliable way 
> to detect non-PJL PCL data, and this typing detection is *not* present in 
> 5.2.1.)

<ESC>E (0x1b45) is the PCL command for resetting a printer to its
defaults.  Another <ESC> *may* follow to introduce some other PCL
instruction(s), but an <ESC> by itself signifies nothing and I can't
imagine it ever occuring.

-- 
JP


____________________ HylaFAX(tm) Users Mailing List _______________________
  To subscribe/unsubscribe, click http://lists.hylafax.org/cgi-bin/lsg2.cgi
 On UNIX: mail -s unsubscribe hylafax-users-request@xxxxxxxxxxx < /dev/null
  *To learn about commercial HylaFAX(tm) support, mail sales@xxxxxxxxx*