hpnp getone snmp hp printers 3 port printserver
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From: Jeff Liebermann <email@example.com> Subject: Re: Quick LP question Date: Fri, 05 Jan 2001 18:51:06 -0800 On Fri, 05 Jan 2001 18:55:15 GMT, Dan <firstname.lastname@example.org> wrote: >Dear Matt, >Make sure the printer on port 1 is always on and on/line. >Or, as Jeff Liebermann pointed out to me a while back, rename >the snmp utility /etc/getone to some other name. >I would encourage you to try netcat instead of using hpnp. >Regards, >Dan
That requires a bit of explanation. The HP JunkDirect print server has only one IP address for all 3 ports. SCO HPNP uses SNMP (stupid network management protocol) to determine if the print server is ready to print. Because there were no 3 port print servers available at the time HPNP was first inscribed, HPNP only polls the first port for status info. If you take the first printer offline, HPNP thinks that all 3ea ports are offline and nothing works on any of the ports. Put the printer on the first port back online, and printing resumes on all ports. The solution is a kludge. If HPNP discovers that SNMP is not installed on the server, it simply pretends that the printe server is always ready. The /etc/getone program is what HPNP uses to get SNMP status. It is not used by any other SCO supplied program and can safetly be renamed to something else. If you get a totally bogus error about adding the printer to some non-existant access list (I forgot the name), it's the /etc/getone problem. Incidentally, the reason SCO has not fixed this problem was that someone decided to impliment IPP (Internet Printing Protocol) instead, which includes all the features of HPNP printing. However, this was deemed to be a major project and the entire effort was dropped. IPP is my favorite example of collective insanity by an industry committee. It is the lack of work on HPNP to deal with modern print servers and ancient bugs that inspired me to push Kevin Smith's netcat program as the solution to all such nonsense. I would strongly recommend trying netcat. You can have both running at the same time and as long as the printer names and printer scripts are different, there should be no complications (famous last words before every disaster). Drivel: Please do not send me 24bit true-colour screen dumps of whatever ails your system via email. I still get my mail via a 14.4Kbits/sec connection and only have about 30MB of diskspace left on my 3.2v4.2 mail server. Sometimes I'm glad that SCO doesn't include an X11 screen grabber.
-- Jeff Liebermann email@example.com 150 Felker St #D Santa Cruz CA 95060 831-421-6491 pager 831-429-1240 fax http://www.cruzio.com/~jeffl/sco/ SCO stuff
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