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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 CUPS-GetDevices
       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  or  /usr/libexec/cups/driver (OS X) directories.  Static PPD files must conform
       to the Adobe PPD File Format Specification version 4.3 and may be compressed using the  gzip(1)  pro-gram. program.
       gram. 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 section 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 gener-ate generate
       ate to stdout using the following format:
           "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 2007-2013 by Apple Inc.



8 July 2013                                         CUPS                                     cups-driverd(8)