NAME

       p910nd - port 9100+n printer daemon

SYNOPSIS

       p910nd [-f device] [-i bindaddr] [-bv] [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.

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 0.95 February 2011

                                         16 February 2011                               P910ND(8)