LPD.CONF(5)                                                        LPD.CONF(5)



NAME
       lpd.conf - configuration file for the LPRng line printer spooler system

DESCRIPTION
       The file lpd.conf is used to provide configuration information for the
       LPRng Printer spooler system and defaults for printcap information.
       Leading spaces on lines are ignored, and blank lines and lines whose
       first nonblank character is a sharp (``#'') are ignored.  Trailing
       blanks and tabs (whitespace) for an option value are deleted unless the
       last one is escaped with a backslash (``\'').  All other lines specify
       parameters and should be of the following form:
              keyword
              keyword@
              keyword#value
              keyword=value
       Note that these values are the same format as printcap(5) values.
       Values in the configuration can contain host or machine dependent
       information; to assist with this, the following escape sequences in the
       configuration information are replaced as follows:

       %h     the short form of the host name (i.e.- non fully qualified).

       %H     the fully qualified host name.

       %a     the abbreviated architecture name, sun4, sol2, hpux, aix, irix5,
              etc.  This value can be set using the architecture keyword in
              the configuration file and is set to a default value at
              compile_time.

       %P     the printer name from the printcap entry (see below).

       %R     the remote printer name from the printcap entry.

       %M     the remote host name from the printcap entry.  This is truncated
              to the short host name.

       For example, on host dickory.sdsu.edu, the strings short=%h long=%H
       arch=%a would be expanded as short=dickory long=dickory.sdsu.edu
       arch=sun4 .

       The P, R, and M tags are provided for use with combined configuration
       and printcap information.  These values are not expanded when the
       printcap information is initially processed, and can be used only in a
       limited number of printcap or other entries.  Currently only the
       printcap :sd: (spool directory) and :forward_server: (forward server)
       entries use these.

GENERAL CONFIGURATION PARAMETERS
       Some of the following paramters take lists of files or directories.
       Unless otherwise explicitly stated, these lists can be separated by
       commas (,), semicolons (;), or colons, (punctuation) and possibly tabs
       or spaces (whitespace) as well.

       Keyword names can use either underscores (_) or hyphens (-) in their
       names, but the underscore is preferred.

       include pathname [pathname*] (no default)
              This can be used to include files into the lpd.conf file.  The
              include file parameter a whitespace separated list of files; the
              files must have absolute pathnames and must be readable.

       ae (default: "jobend $H $n $P $k $b $t")
              This specifies either a script or a filter to be invoked at the
              send of a job for accounting purposes.  See as for the matching
              accounting at start, and the printcap(5) and lpd(8) man pages
              for details.

       allow_getenv (default: "LPD_CONF")
              This option specifies an enviorinment variable whose value is a
              configuration file.  Use of this is restricted to test purposes,
              and SUID ROOT client and server will not run when the variable
              is enabled.

       ar (default: yes)
              See printcap(5) for details.

       architecture
              The default value is set at compile time and can be overwritten
              with this parameter.  The default value of this parameter is set
              at compile time and it is used when expanding the special
              sequence %a in pathname and filename strings in this config
              file.

       auth (default: NULL)
              Authentication type to be used for client to server
              communication.

       auth_client_filter (default: NULL)
              Program to be used for client to server communication.

       auth_forward (default: NULL)
              Authentication type to be used for server to server
              communication.

       auth_forward_filter (default: NULL)
              Program to be used for server to server communication.

       auth_forward_id (default: NULL)
              Authentication id of remote server for server to server
              communication.

       auth_receive_filter (default: NULL)
              Program to be used by server receive server or client
              communication.

       auth_server_id (default: NULL)
              Authentication id of originating client or server.

       as (default: "jobstart $H $n $P $k $b $t")
              See as.

       bk (default: no)
              See printcap(5) for details.

       bk_filter_options
              (default: "$P $w $l $x $y $F $c $L $i $J $C $0n $0h $-a") If the
              "bkf" (backwards compatible filter) flags is set in the printcap
              entry and the original filter specification does not have a `$`
              in it, this option string is appended to a filter specification,
              and the string expanded with values from the printcap
              information and job information.  (see of_filter_options,
              filter_options, bk_filter_options, bk_of_filter_options)

       bk_of_filter_options
              (default: "$w $l $x $y") If the "bkf" (backwards compatible
              filter) flags is set in the printcap entry and the original
              filter specification does not have a `$` in it, this option
              string is appended to the OF filter specification, and the
              string expanded with values from the printcap information and
              job information.  (see of_filter_options, filter_options,
              bk_filter_options, bk_of_filter_options)

       check_for_nonprintable (default: "")
              (Used by LPR) check f and p formats for non_printable characters
              unless -b (binary) or -l (literal) command_line option is
              supplied. Note that files containing HPGL or other printer
              control languages would often be classed as ``non_printable''.

       connect_grace (default: 0 seconds)
              The time to pause before opening a new connection to a printer.
              This allows the printer time to recover from the previous job.

       connect_interval (default: 10 (seconds))
              The time to pause after a failed connection or open of the
              printing device before attempting a new connection or open.

       connect_timeout (default: 10 (seconds))
              The time to wait for a device open or connection to complete.  A
              zero value is infinite timeout.

       retry_nolink (default: true)
              When TRUE and the LPD server is printing or transfering a job,
              then an indefinate number of attempts to connect to or open the
              IO device will be made.

       default_banner_printer (default: "")
              The default banner printer program to be used for printing
              banners.  This should be specified in the LPD configuration
              file.

       default_format (default: "f")
              Default format for printing jobs.

       default_logger_port
              (default: 2001) specifies a default port number for logger
              information.  See logger_destination for details.

       default_logger_protocol
              (default: UDP) specifies a default protocol for logger
              information.  See logger_destination for details.

       default_permission (default: ACCEPT)
              Default permission for operations.

       default_printer (default: "")
              The default printer to use if there is no PRINTER environment
              variable, the user has not specified a printer, or there is no
              printcap information.

       default_priority (default: "A")
              Default priority (class) for printing jobs.  This is also used
              as the job class.

       default_remote_host (default: "%H")
              The default remote host to use.

       default_tmp_dir (default: /tmp)
              Directory for temporary files.

       domain_name (default: "")
              This parameter is optional, and is appended to the hostname to
              make it into a fully_qualified domain name, ie. class.iona.ie.
              It will only be used if the software cannot determine the domain
              name using other means, such as gethostbyname(3n).

       ff (default: \f)
              Formfeed string.

       filter_ld_path
              (default: /lib:/usr/lib:/usr/5lib:/usr/ucblib) The value for the
              environment variable LD_LIBRARY_PATH, both used when executing,
              and passed on to filters.  This variable is used to find shared
              libraries on SunOS, Solaris and Linux.

       filter_options
              (default: "$C $F $H $J $L $P $Q $R $Z $a $c $d $e $f $h $i $j $k
              $l $n $p $r $s $w $x $y $-a") If the "bkf" (backwards compatible
              filter) flags is not set in the printcap entry and the original
              filter specification does not have a `$` in it, this option
              string is appended to a filter specification, and the string
              expanded with values from the printcap information and job
              information.  (see of_filter_options, filter_options,
              bk_filter_options, bk_of_filter_options)

       filter_path
              (default: /bin:/usr/bin:) The value for the environment variable
              PATH, both used to find filters and passed on to filters run by
              lpd and lpr.

       force_poll (default: no)
              Some software packages put print jobs directly into the spool
              queues.  The force_poll flag forces lpd to periodically poll
              spool queues looking for jobs and no server.  The poll_time
              variable sets the interval between polls.

       full_time (default: no)
              Use full time and date format in logging and error messages.

       fx (default: "")
              See printcap(5) for details.  This specifies the job formats
              allowed for this queue.

       group (default "daemon")
              The group to use for file ownership and process permissions.
              Used only by lpd; this can be the name of a group or a number.
              All filters will run as the specified group.  Note that if the
              group value is 0, then the real user group of the process at
              startup will be used.

       kerberos_keytab (default "/etc/lpd.keytab")
              The keytab file to be used by the LPD server when using built-in
              kerberos authentication.  The keytab file should be owned by the
              LPD server, and be readable/writable only by it (i.e. - 600
              permissions).

       kerberos_life (default NULL)
              The lifetime of a Kerberos ticket.  NULL selects the default
              lifetime.  Time should be specified using the standard Kerberos
              time representations.

       kerberos_forward_principal (default NULL)
              remote principal used by server when forwarding

       kerberos_renew (default NULL)
              The renewal of a Kerberos ticket.  NULL selects a non-renewable
              ticket.  Time should be specified using the standard Kerberos
              time representations.

       kerberos_server_principal (default "lpr")
              Server principal used when client sending to server or when
              server is originating connection to another server for
              forwarding.

       kerberos_service (default "lpr")
              The service name used to make requests to the LPD server when
              using kerberos authentication.  For example, if kerberos_service
              has the value lpr, the server is on host alpha.com, and the
              kerberos domain is ALPHA.COM, then the kerberos principal name
              would be:
              lpr/alpha.com@ALPHA.COM.

       la (default: yes)
              See printcap(5) for details.

       lf (default: log)
              Name of the log file.

       lo (default: lock)
              Name of the lock file.

       localhost
              (default "localhost") The name of the localhost entry to be used
              for the TCP/IP loopback interface.  The TCP/IP connection may
              originate from the local host; use this name to check to see if
              the local host address is in the IP address database, and use it
              as the origination address for local connections.  This is done
              to avoid problems with multi-homed hosts who originate
              connections from different interfaces.

       lockfile (default: /var/spool/lpd/lpd)
              The file used to indicate the presence of an lpd server running
              on the host.  The lpd_port value is appended to the lockfile
              value to provide a unique lockfile even when different versions
              of LPRng are running on the same system.

       logger_destination
              (default: "") This specifies a destination for logger
              information generated by the lpd server.  The formation of the
              destination specification is host[%port][,(TCP|UDP)].  For
              example, localhost%2001,UDP would send logger information to the
              localhost IP address, on port 2001 using the UPD protocol.  The
              default port and protocol are set by the default_logger_port and
              default_logger_protocol configuration variables respectively.

       longnumber
              (default: no) RFC1179 requires 3 digit job numbers; setting
              longnumber to yes allows 6 digit numbers.  If the
              backwards_compatible flag is set, only 3 digit numbers will be
              used.

       lpd_port (default: printer)  [ipaddr%]port
              The port that lpd binds to, and that lpr and the other client
              programs send their requests to.  The specification has the
              format ipaddr%port.  If the ipaddress is specified then a bind
              to only this address and port is done.  If the port value is not
              a number a service lookup is performed and the corresponding
              service port is used; see services(5).  This parameter is useful
              for debugging a new installation of LPRng, in that running LPRng
              on a different port from the default will not interfere with a
              previous installation of LPD or LPRng.

       lpd_printcap_path (default: "")
              The location of lpd server only printcap database information.
              If this is nonblank the printcap_pathP will not be used by the
              lpd server.

       mail_operator_on_error (default: "")
              Put this person on the CC-list of the mail, if it is not a
              success mail. (So in addition to the person who made the printer
              request, also this person gets error messages, but no success
              messages.)

       max_status_line (default: 79)
              An integer value specifying the numbers of characters to be used
              for displaying simple job status;  this includes the queue
              position, job identifier,  job contents, size, and time.  A 0
              (zero) value indicates no restrictions.

       max_status_size (default: 10 (Kbytes))
              An integer value specifying (in K bytes) the maximum size of the
              status file to be generated during printing operations.  A 0
              value will create unlimited size status files.  When the file
              size exceeds this value, it is truncated to min_status_size K
              bytes.

       mc (default: 1)
              See printcap(5) for details.

       min_status_size (default: 0 (Kbytes))
              Minimum status size.  If 0, defaults to 20 percent of
              max_status_size.

       minfree (default: 0)
              The amount of free space (in Kbytes) needed in the spool
              directory in order for a job to be accepted.  If 0, there is no
              limit; if the parameter is the name of a file rather than a
              number, the file must contain a numerical minimum free value (in
              Kbytes).  This value is overriden by the printcap mi field
              value.

       ms_time_resolution
              (default: FALSE) This flag causes the time information to be
              printed to millisecond accuracy.  This is overkill for most
              purposes.

       of_filter_options
              (default: "") If this is not set, the value defaults to the same
              as the filter_options value.  This string is appended to a OF
              filter specification, and the string expanded with values from
              the printcap information and job information.  If the "bkf"
              (backwards compatible filter) flags is set in the printcap
              entry, of bk_of_filter_options value is appended instead (see
              of_filter_options, filter_options, bk_filter_options,
              bk_of_filter_options)

       originate_port
              (default: "721 731") A range of port numbers to orginate
              requests from.  When sending service requests, the software will
              try to open and bind to these ports to originate a request to a
              server.  If no port is given, or all of the requested ports are
              unavailable or cannot be bound to, then a normal use port is
              requested.  Note that on UNIX systems, if a port in the range
              0-1023 is requested the EUID of the process must be root for the
              request to be granted.  Note that RFC1179 specifies that
              requests must originate from ports in the range 721-731.

       pass_env
              (default: "PGPPASS,PGPPATH") Client programs such as LPR, LPC,
              etc., will pass these environment variables to any filter
              programs they start.

       poll_time (default: 6000)
              Interval in seconds at which LPD checks for queues with jobs and
              no server active.  See force_poll as well.

       pl (default: 66)
              See printcap(5) for details.

       pr (default: /bin/pr)
              See printcap(5) for details.

       printcap_path
              (default: "/etc/printcap") The location of the printcap database
              file.  If a file or filter does not exist, it is considered a
              fatal error.  All valid entries in these files will be used.
              See PRINTCAP LOOKUP for details.

       perms_path
              (default:
              /etc/lpd.perms:/usr/etc/lpd.perms:/var/spool/lpd/lpd.perms.%h)
              The location of the printer permissions database.  If a file or
              filter does not exist, it is skipped.  The first file or filter
              that exists and is readable will be used.  See PERMISSIONS
              LOOKUP for details.

       pw (default: 80)
              See printcap(5) for details.

       save_on_error
              (default: no) Save a job in the spool queue if it has an error
              rather than removing it.

       save_when_done
              (default: no) Save a job in the spool queue after completion
              rather than removing it.

       send_data_first
              (default: no) Send data files of a job first, followed by the
              control file.

       send_failure_action (default: "")
              The lpd server uses this to determine the action to take when
              unable to print or process a job.  The keyword abort will cause
              it to terminate operations, leaving the job in the queue, remove
              will cause it to remove the job, retry will cause it to retry
              the job, and hold will cause it to hold the job with an error
              indication.  If the value is a filter, then the filter will be
              invoked and the exit status of the filter used to determine the
              actions.

       send_job_rw_timeout (default: 6000)
              When printing or sending a job to a remote printer, use this as
              a write to the device or remote host timeout value.  If a
              timeout occurs, then a FAIL status is returned and the
              send_failure_action value is used to determine what to do on
              failure.

       send_try (default: 3)
              Numbers of times to try to send a job to the printer or remote
              host.  A 0 value means an infinite number of times.

       sendmail (default: "/usr/lib/sendmail -oi -t")
              If the argument is empty then all mail_related functionality is
              disabled.  The arguments are the command to run when mail is to
              be sent.  The command used needs to be able to accept the
              message on stdin, with no arguments.  The message will contain
              the To:, From:, Cc: and Subject: headers.

       server_tmp_dir (default: /tmp)
              Temporary dir for the server.

       spool_dir_perms (default: 042700)
              Permissions of the spool directories.

       spool_file_perms (default: 0600)
              Permissions of the spool files.

       syslog_device (default: /dev/console)
              Log to this device if all else fails.

       use_date (default: no)
              No information about this parameter available.

       use_identifier (default: no)
              Add a job identifier line to the control file, using the 'A'
              entry in the control file.

       use_info_cache (default: yes)
              If this is set to yes, lpd.perms and printcap information
              lookups will be cached for later use.  Only lookups in the main
              databases will be cached, not lookups in the per_printer
              databases.  You can force the lpd to flush its cache and reread
              the permissions file by sending it a SIGHUP.

       use_queuename (default: no)
              Put an entry into control files identifying the spool queue the
              job was originally sent to.  The entry has the form
              'Qspoolname', and its value can be passed to filters.  This is
              useful for setting up a spool queue which formats jobs in
              different ways, depending on the name of the queue.

       use_shorthost (default: no)
              By default, names of lpr job files used the originating host
              fully qualified domain name.  This can exceed 14 characters, the
              limit of file names on some UNIX systems.  If this is set to
              yes, the non-qualified name will be used, and if the host name
              is at most 8 characters the file name will be at most 14
              characters long.

       user (default: daemon)
              The user that lpd and its filters runs as, and the owner of the
              spool directories and other lpd_writable files.  This can be the
              name of a user or a number.  If the user value is 0, then the
              real UID of the program when started will be used.  This allows
              a non_root user to test the functionality of the LRPng software.


PRINTCAP LOOKUP, DATABASE FILES AND FILTERS
       The printcap_path and printer_perms_path variables specify a list of
       either data base files or filters to use to get printcap or permission
       entries for a printer.  To get information, the filter is started and a
       single line with the printer name is sent to it.  Note that the printer
       name all is used to request information either about all printers, or a
       specific printer entry that has a list of all printers.  See
       printcap(5) for more details.

       To find the printcap information, LPRng programs will read the database
       files specified in the printcap_path entry.  The lpd server will read
       any additional files specified in the lpd_printcap_path entry.  If any
       of the files is missing or non-readable a fatal error will result.
       After having searched the various files, if a filter has been specified
       the filter will be started and the required printer name will be sent
       to the filter.  The output from the filter will be used as the printcap
       information.

SECURITY-RELATED PARAMETERS
       Environment variables are sanitized by lpd and the other executables,
       in that the variables IFS, LD_PRELOAD and LD_PROFILE are all deleted
       from the environment passed to filters and any other sub_processes.
       For more reliability, script filters should set their own PATH and
       LD_LIBRARY_PATH variables.

       All filters will run as the user and group specified by the group and
       user variables.


EXAMPLE
       # lpd.conf generated from  on Wed Apr  7 07:59:48 PDT 1999

       #   The values in this file are the default values.
       #   If you modify the file,  set the value to something other than the default
       #   For example, '# default force_localhost' means
       #     the 'force_localhost' option value is on or 1.
       #   Uncomment this and change it to read 'force_localhost@'

       # Purpose: always print banner, ignore lpr -h option
       #   default ab@
       # Purpose: query accounting server when connected
       #   default achk@
       # Purpose: accounting at end (see also af, la, ar, as)
       #   default ae=jobend $H $n $P $k $b $t
       # Purpose: name of accounting file (see also la, ar)
       #   default af=
       af=acct
       # Purpose: automatically hold all jobs
       #   default ah@
       ah
       # Purpose: Allow duplicate command line arguments (legacy requirement)
       #   default allow_duplicate_args@

FILES
       The files used by LPRng are set by values in the printer configuration
       file.  The following are a commonly used set of default values.
       /etc/LPRng/lpd.conf                          LPRng configuration file
       ${HOME}/.printcap                            user printer description file
       /etc/printcap                                printer description file
       /etc/LPRng/lpd.perms                         permissions
       /var/run/lpd                                 lock file for queue control
       /var/spool/lpd                               spool directories
       /var/spool/lpd/QUEUE/control                 queue control
       /var/spool/lpd/QUEUE/log                     trace or debug log file
       /var/spool/lpd/QUEUE/acct                    accounting file
       /var/spool/lpd/QUEUE/status                  status file

SEE ALSO
       lpc(8), lpd(8), checkpc(8), lpr(1), lpq(1), lprm(1), printcap(5),
       lpd.perms(5), pr(1), lprng_certs(1), lprng_index_certs(1).

DIAGNOSTICS
       Most of the diagnostics are self explanatory.
       If you are puzzled over the exact cause of failure,
       set the debugging level on (-D5) and run again.
       The debugging information will
       help you to pinpoint the exact cause of failure.

HISTORY
       LPRng is a enhanced printer spooler system with functionality similar
       to the Berkeley LPR software.  The LPRng mailing list is
       lprng@lprng.com; subscribe by sending mail to lprng-request@lprng.com
       with the word subscribe in the body.  The software is available from
       ftp://ftp.lprng.com/pub/LPRng.

AUTHOR
       Patrick Powell <papowell@lprng.com>.



LPRng                             LPRng-3.9.0                      LPD.CONF(5)
