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94 lines
3.0 KiB
Groff
94 lines
3.0 KiB
Groff
.TH P910ND 8 "1 August 2004"
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.SH NAME
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p910nd \- port 9100+n printer daemon
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.SH SYNOPSIS
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.B p910nd
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[\fB-f device\fR]
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[\fB-i bindaddr\fR]
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[\fB-bv\fR]
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[\fB0|1|2\fR]
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.SH DESCRIPTION
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.I p910nd
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is a small daemon that copies any data received on the port
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it is listening on to the corresponding printer port.
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It is primarily intended for diskless Linux hosts running as printer drivers
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but there is no reason why it could not be used on diskful hosts.
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Port 9100 is copied to /dev/lp0, 9101 to /dev/lp1 and 9102 to /dev/lp2.
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The default is port 9100 to /dev/lp0.
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.LP
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The \fB-f\fR option can be used to specify a different printer device,
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e.g. /dev/usblp0.
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.LP
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The \fB-i\fR option can be used to specify binding to one address instead
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of all interfaces which is the default.
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.LP
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The \fB-b\fR option turns on bidirectional copying.
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.LP
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The \fB-v\fR option shows the version number.
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.SH INSTALLATION
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.I p910nd
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can be run as a standalone daemon or from inetd.
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It will automatically detect if it is running under inetd.
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.LP
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A sample SysVinit script,
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.IR p910nd.sh ,
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is provided for operation as a daemon.
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.I p910nd
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will change its name under ps to match the printer port, i.e.
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.I p9100d, p9101d
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and
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.IR p9102d .
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.LP
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When running under inetd, the
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.I /etc/inetd.conf
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entry should look something like this (with tcpwrappers protection):
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.sp
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.nf
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p9101 stream tcp nowait root /usr/sbin/tcpd /sbin/p910nd
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.fi
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.sp
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Don't forget to add an entry in
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.I /etc/services
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for the corresponding port.
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.LP
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If operating with lprng, use the host%port syntax for the
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printer device to send jobs to it.
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.LP
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If operating with CUPS, this is supported as the AppSocket
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protocol, also known as the JetDirect (probably TM) protocol.
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.LP
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If operating with classic Berkeley lpd, a sample client,
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.IR client.pl ,
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is provided.
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This should be installed as the ifilter (if=) in /etc/printcap.
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.I banner.pl
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should be installed as the ofilter (of=) in /etc/printcap.
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It may be necessary to create a dummy spool file for lpd (lp=).
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This file will be opened but not written to.
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The corresponding C versions are left as an exercise for the reader.
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.LP
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When running under inetd, more than one instance could be started.
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To avoid problems with multiple instances attempting to access the
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printer at the same time, make sure that only one client is active
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at any one time. This can be done by designating one host as the
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spooler and sending all jobs to this host. You will probably
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need to set up an intermediate queue anyway to provide print job filtering.
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.LP
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If compiled with USE_LIBWRAP and linked with -lwrap, it uses the libwrap
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library (tcpwrappers). Access control can be done with /etc/hosts.allow
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and /etc/hosts.deny. The service name is p910nd.
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.SH DIAGNOSTICS
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.I p910nd
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logs error messages to syslog.
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.SH "SEE ALSO"
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printcap(5), hosts_access(5)
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.SH FILES
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/var/run/p9100d.pid, /var/lock/subsys/p9100d, /etc/hosts.allow, /etc/hosts.deny
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.SH COPYRIGHT
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.I p910nd
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is under the GNU Public License
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.SH AUTHOR
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Ken Yap (ken_yap@users.sourceforge.net)
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.SH DATE
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Version 0.8 October 2004
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