NAME

       p910nd - port 9100+n printer daemon

SYNOPSIS

       p910nd [-f device] [-i bindaddr] [-bvd] [0|1|2]

DESCRIPTION

       p910nd  is  a small daemon that copies any data received on the port it is listening on to
       the corresponding printer port.  It is primarily intended for diskless Linux hosts running
       as printer drivers but there is no reason why it could not be used on diskful hosts.  Port
       9100 is copied to /dev/lp0, 9101 to /dev/lp1 and 9102 to /dev/lp2.  The  default  is  port
       9100 to /dev/lp0.

       The -f option can be used to specify a different printer device, e.g. /dev/usblp0.

       The  -i  option  can  be  used to specify binding to one address instead of all interfaces
       which is the default.

       The -b option turns on bidirectional copying.

       The -v option shows the version number.

       The -d option causes the daemon to run in the foreground in standalone mode and prints log
       messages to stdout for debugging.

INSTALLATION

       p910nd  can  be run as a standalone daemon or from (x)inetd.  It will automatically detect
       if it is running under (x)inetd.

       A sample SysVinit script, p910nd.sh, is provided for operation as a daemon.   p910nd  will
       change its name under ps to match the printer port, i.e.  p9100d, p9101d and p9102d.

       When  running  under  (x)inetd,  the /etc/inetd.conf entry should look something like this
       (with tcpwrappers protection):

       p9101 stream tcp nowait root /usr/sbin/tcpd /sbin/p910nd

       Don't forget to add an entry in /etc/services for the corresponding port.

       If operating with lprng, use the host%port syntax for the printer device to send  jobs  to
       it.

       If  operating  with  CUPS,  this is supported as the AppSocket protocol, also known as the
       JetDirect (probably TM) protocol.

       If operating with classic Berkeley lpd, a sample client,  client.pl,  is  provided.   This
       should  be installed as the ifilter (if=) in /etc/printcap.  banner.pl should be installed
       as the ofilter (of=) in /etc/printcap.  It may be necessary to create a dummy  spool  file
       for lpd (lp=).  This file will be opened but not written to.  The corresponding C versions
       are left as an exercise for the reader.

       When running under inetd, more than one instance could be started.  To avoid problems with
       multiple  instances attempting to access the printer at the same time, make sure that only
       one client is active at any one time. This can be done by  designating  one  host  as  the
       spooler  and  sending  all  jobs  to  this  host.  You  will  probably  need  to set up an
       intermediate queue anyway to provide print job filtering.

       If built with USE_WRAP, it uses the libwrap library (tcpwrappers).  Access control can  be
       done with /etc/hosts.allow and /etc/hosts.deny. The service name is p910nd.

DIAGNOSTICS

       p910nd logs error messages to syslog.

SEE ALSO

       printcap(5), hosts_access(5)

FILES

       /var/run/p9100d.pid, /var/lock/p910nd/p9100d, /etc/hosts.allow, /etc/hosts.deny

COPYRIGHT

       p910nd is under the GNU Public License Version 2

AUTHOR

       Ken Yap (greenpossum ATSIGN users PERIOD sourceforge PERIOD net)

DATE

       Version 0.97 January 2014

                                         16 January 2014                                P910ND(8)