Name

       papd — AppleTalk print server daemon

Synopsis

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

       papd [-v | -V]

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 Netatalk 2.0, CUPS is also supported. Simply using cupsautoadd as the first  papd.conf  entry  will
       share  all CUPS printers automagically.  It is still possible to overwrite these defaults by individually
       defining printer shares. See papd.conf(5) for details on the configuration file format.

       papd is typically started at boot time from system init scripts or services.  It  first  reads  from  its
       configuration file, papd.conf.

       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.

       -f configfile

              Consult configfile instead of papd.conf for the configuration information.

       -p printcap

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

       -P pidfile

              Specifies the file in which papd stores its process id.

       -v | -V

              Print version information and exit.

Authentication

       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  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 authentication 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, 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

              Print authentication is only supported on Mac OS 9 and earlier.

Files

       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 from Adobe, Inc., 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’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 (e.g. by using co=“protocol=BCP” when using CUPS 1.1.19 or above).

       When printing clients run Mac OS X 10.2 or later, take care that PPDs do not  make  use  of  *cupsFilter:
       comments unless the appropriate filters are installed at the client’s side, too.

See also

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

Author

       Contributors to the Netatalk Project (https://netatalk.io/contributors)

Netatalk 4.2.3                                                                                           PAPD(8)