[1917] in RedHat Linux List
bug (?) in shutdown
daemon@ATHENA.MIT.EDU (Levente Farkas)
Wed Oct 30 18:18:57 1996
Date: Wed, 30 Oct 1996 23:49:17 +0100 (MET)
From: Levente Farkas <lfarkas@u-szeged.hu>
To: redhat-list@redhat.com
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
Hi,
Now the shutdown manual is included and I read in it:
Access Control
Shutdown can be called from init(8) when the magic keys
CTRL-ALT-DEL are pressed, by creating an appropriate entry
in /etc/inittab. This means that everyone who has physical
access to the console keyboard can shut the system down.
To prevent this, shutdown can check to see if an autho-
rized user is logged in on one of the virtual consoles. If
shutdown is called from init, it checks to see if the file
/etc/shutdown.allow is present. It then compares the
login names in that file with the list of people that are
logged in on a virtual console (from /var/run/utmp). Only
if one of those authorized users or root is logged in, it
will proceed. Otherwise it will write the message
shutdown: no authorized users logged in
to the (physical) system console. The format of /etc/shut-
down.allow is one user name per line. Empty lines and com-
ment lines (prefixed by a #) are allowed. Currently there
is a limit of 32 users in this file.
I have an /etc/shutdown.allow with a few login, but if no one login
and I push CTRL-ALT-DEL than the system shut down and if I login as
a user who not listed in /etc/shutdown.allow and press CTRL-ALT-DEL
the result is the same. I thought in this case the system doesn't
allow the shutdown. And I'm unable to get the :
shutdown: no authorized users logged in
message.
So I misunderstand the manual, this is a bug or this is a "believe or
not Linux standard"?
btw. I'm not on the redhat-list (I can't handle so much message) so I
read this list on the web. But the list October-4 ended at Oct. 26.
and the October-5 started at Oct. 28. where is the missing 2 days?
I send I a few mail in this time and I wanna read the answer or the
mail server is crash? (cause in this case I bounce these mails.
-- Levente
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E-Mail: Levente Farkas <lfarkas@u-szeged.hu>
Homepage: http://www.inf.u-szeged.hu/~lfarkas/
Finger for PGP public key & Geek Code: lfarkas@sol.cc.u-szeged.hu
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