CHARSET
The default text character set (typically us-ascii or iso-8859-1).
backend1
Backend transmission interfaces
Usage
backend job
user
title
num-copies
options
[filename]
Overview
The CUPS backend interface provides a standard method for sending document files to different physical interfaces.
Backends must be capable of reading from a filename on the command-line or from the standard input, copying stdin to a temporary if required by the physical interface.
The command name (argv[0]) is set to the device URI of the destination printer.
Environment
The following environment variables are defined by the CUPS server when executing the backend:
-
CONTENT_TYPE -
The MIME type associated with the file (e.g. application/postscript).
-
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).
-
SERVER_ROOT -
The root directory of the server.
-
SOFTWARE -
The name and version number of the server (typically CUPS/1.0).
-
TZ -
The timezone of the server.
-
USER -
The user executing the backend (typically lp).