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.
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.
"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.
DEBUG: [drivername]
Debugging messages
ERROR: [drivername]
Error messages
INFO: [drivername]
Informational messages