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NAME

       papd - AppleTalk print server daemon

SYNOPSIS

       papd [-d] [-f configfile] [-p printcap]

DESCRIPTION

       papd is the AppleTalk printer daemon. This daemon accepts print jobs from AppleTalk
       clients (typically Macintosh computers) using the Printer Access Protocol (PAP). When used
       with System V printing systems, papd spools jobs directly into an lpd(8) spool directory
       and wakes up lpd after accepting a job from the network to have it re-examine the
       appropriate spool directory. The actual printing and spooling is handled entirely by lpd.

       papd can also pipe the print job to an external program for processing, and this is the
       preferred method on systems not using CUPS to avoid compatibility problems with all the
       flavours of lpd in use.

       As of version 2.0, CUPS is also supported. Simply using cupsautoadd as first papd.conf
       entry will share all CUPS printers automagically using the PPD files configured in CUPS.
       It ist still possible to overwrite these defaults by individually define printer shares.
       See papd.conf(5) for details.

       papd is typically started at boot time, out of system init scripts. It first reads from
       its configuration file, /etc/netatalk/papd.conf. The file is in the same format as
       /etc/printcap. See printcap(5) for details. The name of the entry is registered with NBP.

       The following options are supported:

       Name   Type    Default     Description
        pd    str    ´.ppd´       Pathname to PPD
                                  file
        pr    str    ´lp´         LPD or CUPS printer
                                  name (or pipe to a
                                  print
                                                command)
        op    str    ´operator´   Operator name for LPD
                                  spooling
        au    bool   false        Whether to do
                                  authenticated printing
                                  or not
        ca    str    NULL         Pathname used for
                                  CAP-style
                                  authentification
        sp    bool   false        PSSP-style
                                  authetication
        am    str    NULL         UAMS to use for
                                  authentication
        pa    str    NULL         Printer´s AppleTalk
                                  address
        co    str    NULL         CUPS options as
                                  supplied to the lp(1)
                                  command with "-o"
        fo    bool   false        adjust lineending for
                                  foomatic-rip

       If no configuration file is given, the hostname of the machine is used as the NBP name and
       all options take their default value.

OPTIONS

       -d
           Do not fork or disassociate from the terminal. Write some debugging information to
           stderr.

       -f configfile
           Consult configfile instead of /etc/netatalk/papd.conf for the configuration
           information.

       -p printcap
           Consult printcap instead of /etc/printcap for LPD configuration information.

NOTES

       PSSP (Print Server Security Protocol) is an authentication protocol carried out through
       postscript printer queries to the print server. Using PSSP requires LaserWriter 8.6.1 or
       greater on the client mac. The user will be prompted to enter their username and password
       before they print. It may be necessary to re-setup the printer on each client the first
       time PSSP is enabled, so that the client can figure out that authentication is required to
       print. You can enable PSSP on a per-printer basis. PSSP is the recommended method of
       authenticating printers as it is more robust than CAP-style authentication, described
       below.

       CAP-style authentication gets its name from the method the CAP (Columbia APpletalk)
       package used to authenticate its mac clients´ printing. This method requires that a user
       login to a file share before they print.  afpd records the username in a temporary file
       named after the client´s Appletalk address, and it deletes the temporary file when the
       user disconnects. Therefore CAP style authentification will not work for clients connected
       to afpd via TCP/IP.  papd gets the username from the file with the same Appletalk address
       as the machine connecting to it. CAP-style authentication will work with any mac client.
       If both CAP and PSSP are enabled for a particular printer, CAP will be tried first, then
       papd will fall back to PSSP.

       The list of UAMs to use for authentication (specified with the ´am´ option) applies to all
       printers. It is not possible to define different authentication methods on each printer.
       You can specify the list of UAMS multiple times, but only the last setting will be used.
       Currently only uams_guest.so and uams_clrtxt.so are supported as printer authentication
       methods. The guest method requires a valid username, but not a password. The Cleartext UAM
       requires both a valid username and the correct password.

           Note
           As of this writing, Mac OS X makes no use of PSSP authentication any longer. CAP-style
           authentication normally won´t be an option, too caused by the use of AFP over TCP
           these days.

FILES

       /etc/netatalk/papd.conf
           Default configuration file.

       /etc/printcap
           Printer capabilities database.

       .ppd
           PostScript Printer Description file. papd answers configuration and font queries from
           printing clients by consulting the configured PPD file. Such files are available for
           download from Adobe, Inc. (http://www.adobe.com/support/downloads/main.htm[1]), or
           from the printer´s manufacturer. If no PPD file is configured, papd will return the
           default answer, possibly causing the client to send excessively large jobs.

CAVEATS

       papd accepts characters with the high bit set (a full 8-bits) from the clients, but some
       PostScript printers (including Apple Computer´s LaserWriter family) only accept 7-bit
       characters on their serial interface by default. The same applies for some printers when
       they´re accessed via TCP/IP methods (remote LPR or socket). You will need to configure
       your printer to accept a full 8 bits or take special precautions and convert the
       printjob´s encoding (eg. by using co="protocol=BCP" when using CUPS 1.1.19 or above).

       When printing clients run MacOS 10.2 or above, take care that PPDs do not make use of
       *cupsFilter: comments unless the appropriate filters are installed at the client´s side,
       too (remember: Starting with 10.2 Apple chose to integrate CUPS into MacOS X). For
       in-depth information on how CUPS uses PPDs see chapter 3.4 in http://tinyurl.com/zbxn[2]).

SEE ALSO

       lpr(1),lprm(1),printcap(5),lpc(8),lpd(8), lp(1).

NOTES

        1. http://www.adobe.com/support/downloads/main.htm
           http://www.adobe.com/support/downloads/main.html#Printer

        2. http://tinyurl.com/zbxn
           http://tinyurl.com/zbxn