rwall bug?

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Article #10862

#10862

From: tom reingold
Date: Fri, 10 Feb 1989 07:52

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[Posting to comp.sys.sun and comp.unix.wizards]

As a system administrator of a few dozen systems, I have used the "rwall"
command to notify users of the shutting down of systems.  It seems that
there is a horrible bug that is rather embarrassing.  It sends my message
to all systems on the Internet that it can reach within a short timeout
period.  Thank goodness the period is short, but I have received mail from
various parts of the country saying that my message of shutdowns was
received.

What am I doing wrong?  I used the command "rwall -n <group>" where
<group> is defined in my /etc/netgroup file.

The result seems to be the same, whether I use a machine using Sun OS 3.4,
Sun OS 4.0 or Pyramid's version of Unix.

Tom Reingold                   INTERNET:       tr@bellcore.bellcore.com
Bell Communications Research   UUCP:           bellcore!tr
444 Hoes La room 1H217         PHONE:          (201) 829-4622 [work],
Piscataway, NJ 08854                           (201) 287-2345 [home]

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!husc6!rice!sun-spots-request
From: tr@ctt.bellcore.com (tom reingold)
Newsgroups: comp.sys.sun
Subject: rwall bug?
Message-ID: <13737@bellcore.bellcore.com>
Date: 10 Feb 89 07:52:24 GMT
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Organization: Bellcore, Piscataway, Noo Joizy
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Original-Date: 30 Jan 89 13:58:27 GMT
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