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)