filter - phpMan

filter(1)                   Easy Software Products                   filter(1)



NAME
       filter - cups file conversion filter interfaces

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

DESCRIPTION
       The  CUPS  filter  interface  provides a standard method for adding support for new
       document types to CUPS. Each filter is capable of converting from one or more input
       formats to another format that can either be printed directly or piped into another
       filter to get it to a printable format.

       Filters 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 as required by the
       file format. All output must be sent to the standard output.

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

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

       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 destina-
            tion 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.

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

       PATH
            The standard execution path for external programs that may be run by the  fil-
            ter.

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

       PRINTER
            The name of the printer; this is provided for shell scripts which may  not  be
            able to get the passed argv[0] string.

       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 filter, typically lp; consult the cupsd.conf file for
            the current setting.

COMPATIBILITY
       While the filter interface is compatible with System V interface scripts,  it  will
       only  work  with  the  System V interface script as the only filter.  Typically the
       interface script will be provided via the lpadmin(8) command using the -i option.

SEE ALSO
       backend(1), cupsd(8), CUPS Interface Design Description, CUPS Software  Administra-
       tors  Manual,  CUPS  Software  Programmers  Manual, http://localhost:631/documenta-
       tion.html

COPYRIGHT
       Copyright 1993-2005 by Easy Software Products, All Rights Reserved.



22 June 2000              Common UNIX Printing System                filter(1)

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