239 lines
3.2 KiB
HTML
239 lines
3.2 KiB
HTML
<HTML
|
|
><HEAD
|
|
><TITLE
|
|
>/etc/printcap Tips</TITLE
|
|
><META
|
|
NAME="GENERATOR"
|
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
|
|
"><LINK
|
|
REL="HOME"
|
|
TITLE="The Linux Print2Win mini-HOWTO"
|
|
HREF="index.html"><LINK
|
|
REL="PREVIOUS"
|
|
TITLE="Client (Linux)"
|
|
HREF="x32.html"><LINK
|
|
REL="NEXT"
|
|
TITLE="License"
|
|
HREF="x95.html"></HEAD
|
|
><BODY
|
|
CLASS="section"
|
|
BGCOLOR="#FFFFFF"
|
|
TEXT="#000000"
|
|
LINK="#0000FF"
|
|
VLINK="#840084"
|
|
ALINK="#0000FF"
|
|
><DIV
|
|
CLASS="NAVHEADER"
|
|
><TABLE
|
|
SUMMARY="Header navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TH
|
|
COLSPAN="3"
|
|
ALIGN="center"
|
|
>The Linux Print2Win mini-HOWTO</TH
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="left"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="x32.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="80%"
|
|
ALIGN="center"
|
|
VALIGN="bottom"
|
|
></TD
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="right"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="x95.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"></DIV
|
|
><DIV
|
|
CLASS="section"
|
|
><H1
|
|
CLASS="section"
|
|
><A
|
|
NAME="AEN75">4. <TT
|
|
CLASS="filename"
|
|
>/etc/printcap</TT
|
|
> Tips</H1
|
|
>
|
|
|
|
<P
|
|
> I have used the entry below in the first example, but this is not a
|
|
particularly good idea:
|
|
<TABLE
|
|
BORDER="0"
|
|
BGCOLOR="#E0E0E0"
|
|
WIDTH="100%"
|
|
><TR
|
|
><TD
|
|
><FONT
|
|
COLOR="#000000"
|
|
><PRE
|
|
CLASS="screen"
|
|
>...
|
|
:lp=/dev/null:\</PRE
|
|
></FONT
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
>
|
|
</P
|
|
>
|
|
<P
|
|
> Because lpr does an <SPAN
|
|
CLASS="QUOTE"
|
|
>"exclusive"</SPAN
|
|
> open on the file you specify as lp=.
|
|
It does this in order to prevent multiple processes from trying to
|
|
print to the same printer at the same time.
|
|
</P
|
|
>
|
|
<P
|
|
> The side effect of this is that in your case, <TT
|
|
CLASS="literal"
|
|
>eng</TT
|
|
>
|
|
and <TT
|
|
CLASS="literal"
|
|
>colour</TT
|
|
> can't print at the same time, (usually more
|
|
or less transparent since they probably print quickly and since they queue
|
|
you probably don't notice) but any other process that tries to write to
|
|
<TT
|
|
CLASS="filename"
|
|
>/dev/null</TT
|
|
> will break!
|
|
</P
|
|
>
|
|
<P
|
|
> On a single user system, probably not a big problem. I have a system with
|
|
over 50 printers. It would be a problem there.
|
|
</P
|
|
>
|
|
<P
|
|
> The solution is to create a dummy printer for each. Eg:
|
|
<TT
|
|
CLASS="userinput"
|
|
><B
|
|
>touch /dev/eng</B
|
|
></TT
|
|
>.
|
|
</P
|
|
>
|
|
<P
|
|
> <TABLE
|
|
BORDER="0"
|
|
BGCOLOR="#E0E0E0"
|
|
WIDTH="100%"
|
|
><TR
|
|
><TD
|
|
><FONT
|
|
COLOR="#000000"
|
|
><PRE
|
|
CLASS="screen"
|
|
><TT
|
|
CLASS="prompt"
|
|
>[localhost]$</TT
|
|
> <TT
|
|
CLASS="userinput"
|
|
><B
|
|
>touch /dev/eng</B
|
|
></TT
|
|
>
|
|
<TT
|
|
CLASS="prompt"
|
|
>[localhost]$</TT
|
|
> <TT
|
|
CLASS="userinput"
|
|
><B
|
|
>touch /dev/colour</B
|
|
></TT
|
|
></PRE
|
|
></FONT
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
>
|
|
</P
|
|
>
|
|
</DIV
|
|
><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"><TABLE
|
|
SUMMARY="Footer navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x32.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="index.html"
|
|
ACCESSKEY="H"
|
|
>Home</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x95.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>Client (Linux)</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
> </TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>License</TD
|
|
></TR
|
|
></TABLE
|
|
></DIV
|
|
></BODY
|
|
></HTML
|
|
> |