1cups-lpd(8) Apple Inc. cups-lpd(8)
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6 cups-lpd - receive print jobs and report printer status to lpd clients
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9 cups-lpd [ -h hostname[:port] ] [ -n ] [ -o option=value ]
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12 cups-lpd is the CUPS Line Printer Daemon ("LPD") mini-server that sup‐
13 ports legacy client systems that use the LPD protocol. cups-lpd does
14 not act as a standalone network daemon but instead operates using the
15 Internet "super-server" inetd(8) or xinetd(8). If you are using inetd,
16 add the following line to the inetd.conf file to enable the cups-lpd
17 mini-server:
18 printer stream tcp nowait lp /usr/lib/cups/daemon/cups-lpd cups-lpd \
20 -o document-format=application/octet-stream
21 Note: If you are using Solaris 10 or higher, you must run the inetd‐
23 conv(1m) program to register the changes to the inetd.conf file.
24 If you are using the newer xinetd(8) daemon, create a file named
26 /etc/xinetd.d/cups containing the following lines:
27 service printer
29 {
30 socket_type = stream
31 protocol = tcp
32 wait = no
33 user = lp
34 group = sys
35 passenv =
36 server = /usr/lib/cups/daemon/cups-lpd
37 server_args = -o document-format=application/octet-stream
38 }
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41 -h hostname[:port]
42 Sets the CUPS server (and port) to use.
43 -n
45 Disables reverse address lookups; normally cups-lpd will try to
46 discover the hostname of the client via a reverse DNS lookup.
47 -o name=value
49 Inserts options for all print queues. Most often this is used to
50 disable the "l" filter so that remote print jobs are filtered as
51 needed for printing; the examples in the previous section set the
52 "document-format" option to "application/octet-stream" which
53 forces autodetection of the print file format.
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56 cups-lpd performs well with small numbers of clients and printers. How‐
57 ever, since a new process is created for each connection and since each
58 process must query the printing system before each job submission, it
59 does not scale to larger configurations. We highly recommend that large
60 configurations use the native IPP support provided by CUPS instead.
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63 cups-lpd currently does not perform any access control based on the
64 settings in cupsd.conf(5) or in the hosts.allow(5) or hosts.deny(5)
65 files used by TCP wrappers. Therefore, running cups-lpd on your server
66 will allow any computer on your network (and perhaps the entire Inter‐
67 net) to print to your server.
68 While xinetd has built-in access control support, you should use the
70 TCP wrappers package with inetd to limit access to only those computers
71 that should be able to print through your server.
72 cups-lpd is not enabled by the standard CUPS distribution. Please con‐
74 sult with your operating system vendor to determine whether it is
75 enabled on your system.
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78 cups-lpd does not enforce the restricted source port number specified
79 in RFC 1179, as using restricted ports does not prevent users from sub‐
80 mitting print jobs. While this behavior is different than standard
81 Berkeley LPD implementations, it should not affect normal client opera‐
82 tions.
83 The output of the status requests follows RFC 2569, Mapping between LPD
85 and IPP Protocols. Since many LPD implementations stray from this defi‐
86 nition, remote status reporting to LPD clients may be unreliable.
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89 cups(1), cupsd(8), inetconv(1m), inetd(8), xinetd(8),
90 http://localhost:631/help
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93 Copyright 2007-2009 by Apple Inc.
944 August 2008 CUPS cups-lpd(8)