cups-driverd(8) 						    Apple Inc.							   cups-driverd(8)

NAME

       cups-driverd - cups driver daemon

SYNOPSIS

       cups-driverd cat ppd-name
       cups-driverd list request_id limit options

DESCRIPTION

       cups-driverd  shows  or	lists  PPD  files.  It is run in response to CUPS-Add-Modify-Printer or CUPS-Get-Devices requests.  The first form
       ("cups-driverd cat ppd-name") writes the named PPD file to stdout. The output format is an uncompressed PPD file.

       The second form lists the available manufacturers or PPD files to stdout as indicated by the options argument. The output format is an  IPP
       response  message.  The	request_id  argument is the request ID from the original IPP request, typically 1. The limit argument is the limit
       value from the original IPP request - 0 means no limit. Finally, the options argument is a space-delimited list of attributes  ("name=value
       name=value  ...")  that	were passed in with the request. Currently cups-driverd looks for the ppd-make and requested-attributes attributes
       and tailors the output accordingly.

DRIVERS

       Drivers can be static PPD files under the /usr/share/cups/model directory or programs under the /usr/lib/cups/driver directory. Static  PPD
       files  must conform to the Adobe PPD File Format Specification version 4.3 and may be compressed using the gzip(1) program. Driver programs
       must implement the command-line interface shown in the next section.

   DRIVER PROGRAMS
       Driver programs provide a  interface to dynamically-generated PPD files. The following arguments are currently defined:

       drivername list
	    Lists the supported PPD files to stdout.

       drivername cat ppdname
	    Writes the named PPD file to stdout.

       Driver programs MUST NOT query hardware or make other long-term operations that would delay the return of a driver list. See the NOTES sec-
       tion below for specific recommendations.

   LISTING FILES (drivername list)
       When  run with the single argument "list", the program must list the available PPD files it can generate to stdout using the following for-
       mat:
	   "drivername:ppdname" language "make" "make and model"
	   "drivername:ppdname" language "make" "make and model" "1284 device id"
	   "drivername:ppdname" language "make" "make and model" "1284 device id" "(PPD product)"
	   "drivername:ppdname" language "make" "make and model" "1284 device id" "(PPD product)" "PostScript version"
	   "drivername:ppdname" language "make" "make and model" "1284 device id" "(PPD product)" "PostScript version" "type"

       Drivername is the name of the driver program. Ppdname is the name used to select the given driver. Language is the locale  associated  with
       the  default language of the PPD file, typically "en". Make is the Manufacturer name from the PPD file. Make and model is the NickName name
       from the PPD file. 1284 device id is the 1284DeviceId from the PPD file, if any. (PPD product) is the Product string as it would appear	in
       the PPD file or from a PostScript query. PostScript version is the PSVersion string as it would appear in the PPD file or from a PostScript
       query. Type is "postscript" for PostScript printers, "pdf" for PDF printers, "raster" for raster printers, or "fax" for facsimile devices.

   WRITING FILES (drivername cat ppdname)
       When the driver program is run with the "cat ppdname" arguments, it must write the named PPD file to stdout, uncompressed. If the named PPD
       file does not exist, the driver program must not write any output to stdout and report the error to stderr instead.

   DRIVER ERROR MESSAGES
       Error messages can be relayed back to cupsd by writing them to stderr. The following prefixes are recognized:

       DEBUG: [drivername]
	    Debugging messages

       ERROR: [drivername]
	    Error messages

       INFO: [drivername]
	    Informational messages

NOTES

       Due  to	performance  considerations, driver programs have been officially deprecated and should not be used for new development. Currently
       only the CUPS web interface and lpinfo(8) command will request lists from all driver programs.

SEE ALSO

       cupsd(8), cupsd.conf(5), cupstestppd(1), lpinfo(8),
       http://localhost:631/help

COPYRIGHT

       Copyright 2007-2011 by Apple Inc.

6 January 2011							       CUPS							   cups-driverd(8)