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- .\" This product includes software developed by the University of
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- .\" 4. Neither the name of the University nor the names of its contributors
- .\" may be used to endorse or promote products derived from this software
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- .\" @(#)4.t 6.6 (Berkeley) 4/17/91
- .\"
- .NH 1
- Setting up
- .PP
- The 4.3BSD release comes with the necessary programs
- installed and with the default line printer queue
- created. If the system must be modified, the
- makefile in the directory /usr/src/usr.lib/lpr
- should be used in recompiling and reinstalling
- the necessary programs.
- .PP
- The real work in setting up is to create the
- .I printcap
- file and any printer filters for printers not supported
- in the distribution system.
- .NH 2
- Creating a printcap file
- .PP
- The
- .I printcap
- database contains one or more entries per printer.
- A printer should have a separate spooling directory;
- otherwise, jobs will be printed on
- different printers depending on which printer daemon starts first.
- This section describes how to create entries for printers that do not
- conform to the default printer description (an LP-11 style interface to a
- standard, band printer).
- .NH 3
- Printers on serial lines
- .PP
- When a printer is connected via a serial communication line
- it must have the proper baud rate and terminal modes set.
- The following example is for a DecWriter III printer connected
- locally via a 1200 baud serial line.
- .DS
- .DT
- lp|LA-180 DecWriter III:\e
- :lp=/dev/lp:br#1200:fs#06320:\e
- :tr=\ef:of=/usr/lib/lpf:lf=/usr/adm/lpd-errs:
- .DE
- The
- .B lp
- entry specifies the file name to open for output. Here it could
- be left out since ``/dev/lp'' is the default.
- The
- .B br
- entry sets the baud rate for the tty line and the
- .B fs
- entry sets CRMOD, no parity, and XTABS (see \fItty\fP\|(4)).
- The
- .B tr
- entry indicates that a form-feed should be printed when the queue
- empties so the paper can be torn off without turning the printer off-line and
- pressing form feed.
- The
- .B of
- entry specifies the filter program
- .I lpf
- should be used for printing the files;
- more will be said about filters later.
- The last entry causes errors
- to be written to the file ``/usr/adm/lpd-errs''
- instead of the console. Most errors from \fIlpd\fP are logged using
- \fIsyslogd\fP\|(8) and will not be logged in the specified file. The
- filters should use \fIsyslogd\fP to report errors; only those that
- write to standard error output will end up with errors in the \fBlf\fP file.
- (Occasionally errors sent to standard error output have not appeared
- in the log file; the use of \fIsyslogd\fP is highly recommended.)
- .NH 3
- Remote printers
- .PP
- Printers that reside on remote hosts should have an empty
- .B lp
- entry.
- For example, the following printcap entry would send output to the printer
- named ``lp'' on the machine ``ucbvax''.
- .DS
- .DT
- lp|default line printer:\e
- :lp=:rm=ucbvax:rp=lp:sd=/usr/spool/vaxlpd:
- .DE
- The
- .B rm
- entry is the name of the remote machine to connect to; this name must
- be a known host name for a machine on the network.
- The
- .B rp
- capability indicates
- the name of the printer on the remote machine is ``lp'';
- here it could be left out since this is the default value.
- The
- .B sd
- entry specifies ``/usr/spool/vaxlpd''
- as the spooling directory instead of the
- default value of ``/usr/spool/lpd''.
- .NH 2
- Output filters
- .PP
- Filters are used to handle device dependencies and to
- do accounting functions. The output filtering of
- .B of
- is used when accounting is
- not being done or when all text data must be passed through a filter.
- It is not intended to do accounting since it is started only once,
- all text files are filtered through it, and no provision is made for passing
- owners' login name, identifying the beginning and ending of jobs, etc.
- The other filters (if specified) are started for each file
- printed and do accounting if there is an
- .B af
- entry.
- If entries for both
- .B of
- and other filters are specified,
- the output filter is used only to print the banner page;
- it is then stopped to allow other filters access to the printer.
- An example of a printer that requires output filters
- is the Benson-Varian.
- .DS
- .DT
- va|varian|Benson-Varian:\e
- :lp=/dev/va0:sd=/usr/spool/vad:of=/usr/lib/vpf:\e
- :tf=/usr/lib/rvcat:mx#2000:pl#58:px=2112:py=1700:tr=\ef:
- .DE
- The
- .B tf
- entry specifies ``/usr/lib/rvcat'' as the filter to be
- used in printing \fItroff\fP\|(1) output.
- This filter is needed to set the device into print mode
- for text, and plot mode for printing
- .I troff
- files and raster images (see \fIva\fP\|(4V)).
- Note that the page length is set to 58 lines by the
- .B pl
- entry for 8.5" by 11" fan-fold paper.
- To enable accounting, the varian entry would be
- augmented with an
- .B af
- filter as shown below.
- .DS
- .DT
- va|varian|Benson-Varian:\e
- :lp=/dev/va0:sd=/usr/spool/vad:of=/usr/lib/vpf:\e
- :if=/usr/lib/vpf:tf=/usr/lib/rvcat:af=/usr/adm/vaacct:\e
- :mx#2000:pl#58:px=2112:py=1700:tr=\ef:
- .DE
- .NH 2
- Access Control
- .PP
- Local access to printer queues is controlled with the
- .B rg
- printcap entry.
- .DS
- :rg=lprgroup:
- .DE
- Users must be in the group
- .I lprgroup
- to submit jobs to the specified printer.
- The default is to allow all users access.
- Note that once the files are in the local queue, they can be printed
- locally or forwarded to another host depending on the configuration.
- .PP
- Remote access is controlled by listing the hosts in either the file
- /etc/hosts.equiv or /etc/hosts.lpd, one host per line. Note that
- .IR rsh (1)
- and
- .IR rlogin (1)
- use /etc/hosts.equiv to determine which hosts are equivalent for allowing logins
- without passwords. The file /etc/hosts.lpd is only used to control
- which hosts have line printer access.
- Remote access can be further restricted to only allow remote users with accounts
- on the local host to print jobs by using the \fBrs\fP printcap entry.
- .DS
- :rs:
- .DE
-