\"      $NetBSD: pcnfsd.8,v 1.8 2008/09/27 04:47:01 reed Exp $
\" @(#) @(#)pcnfsd.8c   1.1 9/3/91;
TH RPC.PCNFSD 8 "25 April 1991"
SH NAME
pcnfsd, rpc.pcnfsd \- (PC)NFS authentication and print request server
SH SYNOPSIS
B /usr/sbin/rpc.pcnfsd
SH DESCRIPTION
LP
B pcnfsd
is an
SM RPC
server that supports Sun ONC clients on PC (DOS, OS/2, Macintosh, and other)
systems. This page describes version two of the
B pcnfsd
server.
LP
B rpc.pcnfsd
may be started from
B /etc/rc.local
or by the
BR inetd (8)
superdaemon. It reads the configuration file
B /etc/pcnfsd.conf
if present, and then services RPC requests directed to
program number 150001. This release of the
B pcnfsd
daemon supports both version 1 and version 2 of the pcnfsd
protocol. Consult the
B rpcgen
source file
B pcnfsd.x
for details of the protocols.
LP
The requests serviced by
B pcnfsd
fall into three categories: authentication, printing, and other. Only the
authentication and printing services have administrative significance.
SH AUTHENTICATION
When
B pcnfsd
receives a
B PCNFSD_AUTH
or
B PCNFSD2_AUTH
request\**, it will "log in" the user by validating the username and
password and returning the corresponding uid, gids, home directory,
and umask. If
B pcnfsd
was built with the
B WTMP
compile-time option, it will also append a record to the
BR wtmp (5)
data base. If you do not wish to record PC "logins" in this way,
you should add a line of the form
RS
sp
\fBwtmp off\fP
sp
RE
to the
B /etc/pcnfsd.conf
file.
SH PRINTING
LP
B pcnfsd
supports a printing model based on the use of NFS to transfer
the actual print data from the client to the server. The client system
issues a
B PCNFSD_PR_INIT
or
B PCNFSD2_PR_INIT
request, and the server returns the path to a spool directory which
the client may use and which is exported by NFS.
B pcnfsd
creates a subdirectory for each of its clients: the parent
directory is normally
B /export/pcnfs
and the subdirectory is the hostname of the client system.
If you wish to use a different parent directory, you should add a
line of the form
RS
sp
\fBspooldir\fP \fIpath\fP
sp
RE
to the
B /etc/pcnfsd.conf
file.
LP
Once a client has mounted the spool directory using NFS
and has transferred print data to a file in this directory, it
will issue a
B PCNFSD_PR_START
or
B PCNFSD2_PR_START
request.
B pcnfsd
handles this, and most other print-related requests, by
constructing a command based on the printing services of
the server operating system and executing the command using the
identity of the PC user. Since this involves set-user-id privileges,
B pcnfsd
must be run as root.
LP
Every print request from the client includes the name of the printer
which is to be used. In SunOS, this name corresponds to a printer
definition in the
BR /etc/printcap (5)
database. If you wish to define a non-standard way of processing
print data, you should define a new printer and arrange for the
client to print to this printer. There are two ways of setting up a new printer.
The first involves the addition of an entry to
BR /etc/printcap (5)
and the creation of filters to perform the required processing. This
is outside the scope of this discussion. In addition,
B pcnfsd
includes a mechanism by which  you can define virtual printers known
only to
B pcnfsd
clients. Each printer is defined by a line in the
B /etc/pcnfsd.conf
file of the following form
RS
sp
\fBprinter\fP \fIname alias-for command\fP
sp
RE
\fIname\fP is the name of the printer you want to define. \fIalias-for\fP
is the name of a "real" printer which corresponds to this printer. For
example, a request to
display the queue for \fIname\fP will be translated into the
corresponding request for the printer \fIalias-for\fP. If you have
defined a printer in such a way that there is no "real" printer to
which it corresponds, use a single "-" for this field. (See the
definition of the printer
B test
below for an example.) \fIcommand\fP is a
command which will be executed whenever a file is printed on \fIname\fP.
This command is executed by the Bourne shell,
B /bin/sh
using the
B -c
option. For complex operations you should
construct an executable shell program and invoke that in \fIcommand\fP.
Within \fIcommand\fP the following tokens will be replaced:
LP
TP 10
B Token
B Substitution
TP
SB $FILE
Replaced by the full path name of the print data file. When
the command has been executed, the file will be unlinked.
TP
SB $USER
Replaced by the username of the user logged in to the client system.
TP
SB $HOST
Replaced by the host name of the client system.
LP
Consider the following example
B /etc/pcnfsd.conf
file:
RS
sp
printer rotated lw /usr/local/bin/enscript -2r \s-2$FILE\s0
br
printer test - /usr/bin/cp \s-2$FILE\s0 /usr/tmp/\s-2$HOST\s0-\s-2$USER\s0
sp
RE
If a client system prints a job on the printer
B rotated
the utility
B enscript
will be invoked to pre-process the file \s-2$FILE\s0. In this
case, the
B -2r
option causes the file to be printed in two-column rotated format
on the default PostScript\(rg printer.
If the client requests a list of the print queue for the printer
B rotated
the
B pcnfsd
daemon will translate this into a request for a listing for
the printer
B lw.
LP
The printer
B test
is used only for testing. Any file sent to this printer
will be copied into
B /usr/tmp.
Any request to list the queue, check the status, etc. of printer
B test
will be rejected because the \fIalias-for\fP has been specified as "-".
SH FILES
PD 0
TP 20
B /etc/pcnfsd.conf
configuration file
TP 20
B /export/pcnfs
default print spool directory
PD
SH "SEE ALSO"
BR lpr (1),
BR lpc (8)
SH HISTORY
The
B pcnfsd
source code is distributed by Sun Microsystems, Inc. with their
SM PC/NFS
product under terms described in common.h in that source code.
Those terms require that you be informed that this version of
B pcnfsd
was modified to run on NetBSD and is NOT supported by Sun.

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