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cups-lpd(8) Easy Software Products cups-lpd(8)
NAME
cups-lpd - receive print jobs and report printer status to lpd clients
SYNOPSIS
cups-lpd [ -o option=value ]
DESCRIPTION
cups-lpd is the CUPS Line Printer Daemon ("LPD") mini-server that supports legacy
client systems that use the LPD protocol. cups-lpd does not act as a standalone
network daemon but instead operates using the Internet "super-server" inetd(8). Add
the following line to the inetd.conf file to enable the cups-lpd daemon:
printer stream tcp nowait lp /path/to/cups/daemon/cups-lpd cups-lpd -o document-format=application/octet-stream
If you are using the newer xinetd(8) daemon, add the following lines to the
xinetd.conf file:
service printer
{
socket_type = stream
protocol = tcp
wait = no
user = lp
group = sys
passenv =
server = /path/to/cups/daemon/cups-lpd
server_args = -o document-format=application/octet-stream
}
The /path/to/cups/daemon is usually /usr/lib/cups/daemon or /usr/libexec/cups/dae-
mon, depending on the operating system. Consult the cupsd.conf file for the local
setting.
OPTIONS
The -o option to cups-lpd inserts options for all print queues. Most often this is
used to disable the "l" filter so that remote print jobs are filtered as needed for
printing:
printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd -o document-format=application/octet-stream
server = /usr/lib/cups/daemon/cups-lpd
server_args = -o document-format=application/octet-stream
The example shown resets the document format to be application/octet-stream, which
forces auto-detection of the print file type.
PERFORMANCE
cups-lpd performs well with small numbers of clients and printers. However, since a
new process is created for each connection and since each process must query the
printing system before each job submission, it does not scale to larger configura-
tions. We highly recommend that large configurations use the native IPP support
provided by CUPS instead.
SECURITY
cups-lpd currently does not perform any access control based on the settings in
cupsd.conf(5) or in the hosts.allow(5) or hosts.deny files used by TCP wrappers.
Therefore, running cups-lpd on your server will allow any computer on your network
(and perhaps the entire Internet) to print to your server.
While xinetd has built-in access control support, you should use the TCP wrappers
package with inetd to limit access to only those computers that should be able to
print through your server.
cups-lpd is not enabled by the standard CUPS distribution. Please consult with
your operating system vendor to determine whether it is enabled in their distribu-
tions.
COMPATIBILITY
cups-lpd does not enforce the restricted source port number specified in RFC 1179,
as using restricted ports does not prevent users from submitting print jobs. While
this behavior is different than standard Berkeley LPD implementations, it should
not affect normal client operations.
The output of the status requests follows RFC 2569, Mapping between LPD and IPP
Protocols. Since many LPD implementations stray from this definition, remote status
reporting to LPD clients may be unreliable.
SEE ALSO
cupsd(8), inetd(8), xinetd(8), CUPS Software Administrators Manual, http://local-
host:631/documentation.html
COPYRIGHT
Copyright 1993-2005 by Easy Software Products, All Rights Reserved.
11 August 2004 Common UNIX Printing System cups-lpd(8)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-08-20 21:41 @38.103.63.61 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)