> From [EMAIL PROTECTED] Thu Sep 11 18:33:17 2003
> Date: Fri, 12 Sep 2003 10:07:39 +1000
> To: [EMAIL PROTECTED]
> Subject: LPRng: An interesting idea for lprng
> From: [EMAIL PROTECTED] (Craig Small)
>
> Hello Patrick,
> Here is an interesting but strange idea. Something for those times
> when you wonder what wackyness you can get lprng to do in your spare
> moments :)
>
> Needless to say, while the idea has merit, occassional users probably
> should use something more lightweight.
>
> ref: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=199094
>
> Dmitry Rutsky <[EMAIL PROTECTED]> reported:
> > I think there should be a way to start the daemon only when it is needed. Of
> > course, constant run is completely acceptable for servers, but for a home
> > computer, where printing is occasional and rare, most of the time it is just
> > a redundant process slot, about 350K of virtual memory and bootup entry. Not
> > very much to worry about, though.
> >
> > I couldn't figure out how to do it from the lprng documentation. AFAIK, all
> > thegood daemons which perform server functions for occasional tasks can run via
> > inetd; lpd doesn't seem to be able to do so.
>
> - Craig
>
> --
> Craig Small GnuPG:1C1B D893 1418 2AF4 45EE 95CB C76C E5AC 12CA DFA5
> Eye-Net Consulting http://www.enc.com.au/ MIEE Debian developer
> csmall at : enc.com.au ieee.org debian.org
One of the problems that other severs do not have to deal with is
restarting operations. The print spooler is considered broken
if, after rebooting, printing of jobs in the spool queue are not
automatically started.
After several years and (literally) hundreds of queiries about this
I ripped out the inetd support in the old PLP software.
Having said this, if you want to add it, do the folllwing:
a) /etc/lpd.conf - set unix_socket_path to 'no' or '' to
suppress the use of the Unix socket (/var/run/lpd)
b) add a '-i' option oto lpd.c that will cause:
fd 1, 2 to be opened to /dev/null
dup fd 0 to Listen_FD
close fd 0 and dup fd 1 to fd 0
skip the socket/bind/listen for the TCP/IP lpd listen
socket.
Remove the lpd startup code from wherever it is hiding.
Add entry to /etc/inetd with 'wait' for the mode, and -i option.
killall lpd
killall -HUP inetd (or killal -pHUP xinetd)
Test. Rinse. Repeat. Reboot. Test. Rinse... etc.
Good luck. If you do this, perhaps you can post patches
and some documentation. Then if other folks want to do
this, we can have some information for them.
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