SUMMARY: /dev/null.....I need 2

From: Frode Stromsvag (frode@read-well.no)
Date: Fri Jun 23 1995 - 04:35:42 CDT


Thanks.

I guess this was an easy one.

1. Use 'mknod c 3 2 /dev/null2' to create a second 'null'-fil, and
   'chmod 666 /dev/null2'.
2. Some proposed that I could create a symbolic link to /dev/null, but
3. some of you recommended not to use /dev/null for printing since
   lpd's lock on /dev/null may interfere with ordinary (non-printing)
   processes attempting to access /dev/null.
4. Some suggested I could create an empty file in each printers
   spool directory and have printcap point to these files instead.

Thanks to
mueller@darmstadt.gmd.de
Martin Achilli
Birger A. Wathne
Anatoly M. Lisovsky
tim@ben.dciem.dnd.ca Tim Pointing
Brett Lymn
chrish@miles33.com Chris Habasinski
pauls@essex.ac.uk
andrew@dcs.bbk.ac.uk Andrew Watkins
peter.allan@aeat.co.uk
dlp@medphys.ucl.ac.uk Dave Plummer
fruechtenicht@rz.fh-wilhelmshaven.de Henning Fruechtenicht
ric@rtd.com Ric Anderson
blu@mc.com Brian Utterback
fletch@ain.bls.com
wightman@sol.acs.uwosh.edu Brian T. Wightman
anderson@neon.mitre.org Mark S. Anderson
dhb@ssd.ray.com David H. Brierley
rp2893@email.sps.mot.com RJ Nichols III
ichael.shon@East.Sun.COM Michael Shon
mike@trdlnk.com Michael T. Sullivan
dave@exar.com Dave Haut
pln@egret1.Stanford.EDU Patrick L. Nolan

....and I'm sure many more to come.....

The original:

----- Begin Included Message -----

Hello out there.

I have connected two printers to a dual parallel card on
an IPC running SunOS 4.1.3. The printcap entries look
like this:

Postscript-1|ps:\
        :lp=/dev/null:\
        :if=/soft/RWS/prog/sparc/ps_spool:\
        :sd=/usr/spool/lpq1:\
        :lf=/usr/adm/lpd-errs:mx#0:sf:sh:
Postscript-2|lp:\
        :lp=/dev/null:\
        :if=/soft/RWS/prog/sparc/ps_spool2:\
        :sd=/usr/spool/lpq2:\
        :lf=/usr/adm/lpd-errs:mx#0:sf:sh:

This brings me into a lock situation on /dev/null, so one printer
has to finish before the other can start. I want them both to
be active simultaneously.

Does anyone know how to create a second null file, /dev/null2?

Of course I will summarize.

Frode Stromsvag email: frode@read-well.no
READ Well Services a.s.
Ravnsborgveien 56
P.O. Box 25
1364 Hvalstad Phone number: +47-66982240
NORWAY FAX number: +47-66982022

----- End Included Message -----



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