backend man page on DigitalUNIX

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backend(1)		    Easy Software Products		    backend(1)

NAME
       backend - cups backend transmission interfaces

SYNOPSIS
       backend job user title num-copies options [ filename ]

DESCRIPTION
       The CUPS backend interface provides a standard method for sending docu‐
       ment files to different physical interfaces.

       Backends must be capable of reading from a filename on the command-line
       or  from	 the standard input, copying the standard input to a temporary
       file if required by the physical interface.

       The command name (argv[0]) is set to the device URI of the  destination
       printer.

ENVIRONMENT VARIABLES
       The following environment variables are defined by the CUPS server when
       executing the backend:

       CHARSET
	    The default text character set (typically us-ascii or iso-8859-1).

       CONTENT_TYPE
	    The MIME type associated with  the	file  (e.g.  application/post‐
	    script).

       CUPS_DATADIR
	    The directory where data files can be found.

       CUPS_SERVERROOT
	    The root directory of the server.

       DEVICE_URI
	    The	 device-uri  associated with the printer; this is provided for
	    shell scripts which may not be able	 to  get  the  passed  argv[0]
	    string.

       LANG
	    The default language locale (typically C or en).

       PATH
	    The	 standard execution path for external programs that may be run
	    by the backend.

       PPD
	    The full pathname of the PostScript Printer Description (PPD) file
	    for this printer.

       PRINTER
	    The name of the printer.

       RIP_CACHE
	    The	 recommended  amount of memory to use for Raster Image Proces‐
	    sors (RIPs).

       SOFTWARE
	    The name and version number of the server (typically CUPS/1.1).

       TZ
	    The timezone of the server.

       USER
	    The user executing the backend (typically lp).

SEE ALSO
       cupsd(8), filter(1) CUPS Interface Design  Description,	CUPS  Software
       Administrators  Manual, CUPS Software Programmers Manual, http://local‐
       host:631/documentation.html

COPYRIGHT
       Copyright 1993-2002 by Easy Software Products, All Rights Reserved.

22 June 2000		  Common UNIX Printing System		    backend(1)
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