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RedHat 9 (Linux i386) - man page for backend (redhat section 1)

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 document files to dif-
       ferent physical interfaces.

       Backends must be capable of reading from a filename on the command-line or from the  stan-
       dard  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).

       CLASS
	    When  a  job  is  submitted  to a printer class, contains the name of the destination
	    printer class. Otherwise this environment variable will not be set.

       CONTENT_TYPE
	    The MIME type associated with the file (e.g. application/postscript).

       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 Processors (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 Man-
       ual, CUPS Software Programmers Manual, http://localhost: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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