NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/unix/sysv386/14529

Internet Message Format | 1992-09-15 | 1.6 KB

Path: sparky!uunet!usc!sdd.hp.com!spool.mu.edu!yale.edu!jvnc.net!rutgers!modus!dyna!osra!felix!eb
From: [e-mail] (Enrico Badella)
Newsgroups: comp.unix.sysv386
Subject: What is the meaning of EPROTO (Protocol error) on select()?
Message-ID: <[e-mail]>
Date: 11 Sep 92 18:04:43 GMT
Organization: Soft*Star s.r.l, Torino, Italy
Lines: 30

Hi,

As the Subject line states I'm trying to find a meaning of EPROTO
Protocol error (errno = 71) that bites me at random times on
a select().
My environment is SCO-ODT 1.1 and my application simply reads/writes
from 2 different TCP/IP sockets and sets a timeout. After reading
some data it posts it on a message queue and returns on the select().

I reported the problem to SCO and got the following answer:

begin quote
"EPROTO Protocolo error: Some protocol error occured. This error is device
 specific, but is generally not related to a hardware failure. An EPROTO
 error can come from any device that is serviced by ioctl(S) calls. You
 must debug the code to determine what call is causing the problem"
end quote

The first part is extracted from their manuals.
My code never calls a ioctl(2) but does TCP/IP activity.
The last sentece was a revelation to me! I though code would self repair.

Thanks to for any suggestions ... maybe I should also thank sco for
giving me a daily set of new problems so I'll never become lazy.

--
Enrico Badella                Internet: [e-mail]
Soft*Star s.r.l.                      [e-mail]
Via Camburzano 9            Phone:    [phone]
10143 Torino, ITALY            Fax:      [phone]