How does "shutdown" in Solaris 2.6 notify users of impending shutdown?
2007-12-25 11:39:00
below). This is my final summary and I've got a good handle on my
stupid script mistake, etc..
Basically, most people initially said that I should be using the
scripted version of shutdown (the SYSV version, not the /usr/ucb
version). As it turned out, that is what I was using, but when I
quoted which version I was using, I wasn't logged on as root. Also, a
number of people reported my script mistake which was to remove the
"-x" (see comment on first bullet below) which indicates that the "if"
statement is a compound-if statement -- my mistake! I'm far from a
shell guru! Also, a number of people indicated that the "stock"
behavior under CDE is that nobody gets notified.. While this is true,
it is an easy fix by just adding the "-a" to the wall command in the
notify routine within /usr/sbin/shutdown (or /etc/shutdown on older
Solaris?). I believe that once this is done, CDE users will receive
the same messages that openwindow users normally do (according to some
of the mail I received!).
I'm also enclosing the smbwall script that I referred to since at
least one person was interested and perhaps others might find it
interesting. Keep in mind that I was thinking that I had tweaked the
smbwall script from its original condition, but upon checking a minute
ago, I found that I changed very little (ok, almost none!) from the
stock version supplied with Samba (see ~/examples/misc/wall.perl in
any Samba tar file).
#!/usr/local/bin/perl
#
#@(#) smb-wall.pl Description:
#@(#) A perl script which allows you to announce whatever you choose to
#@(#) every PC client currently connected to a Samba Server...
#@(#) ...using "smbclient -M" message to winpopup service.
#@(#) Default usage is to message every connected PC.
#@(#) Alternate usage is to message every pc on the argument list.
#@(#) Hacked up by Keith Farrar <farrar@parc.xerox.com>
#
# Cleanup and corrections by
# Michal Jaegermann <michal@ellpspace.math.ualberta.ca>
# Message to send can be now also fed (quietly) from stdin; a pipe will do.
#=============================================================================
$smbstatus = "/usr/local/samba/bin/smbstatus";
$smbshout = "/usr/local/samba/bin/smbclient -d 3 -M";
if (@ARGV) {
@clients = @ARGV;
undef @ARGV;
}
else { # no clients specified explicitly
open(PCLIST, "$smbstatus |") || die "$smbstatus failed!.\n$!\n";
while(<PCLIST>) {
last if /^Locked files:/;
split(' ', $_, 6);
# do not accept this line if less then six fields
next unless $_[5];
# if you have A LOT of clients you may speed things up by
# checking pid - no need to look further if this pid was already
# seen; left as an exercise :-)
$client = $_[4];
print "\n",$client;
# next unless $client =~ /^\w+\./; # expect 'dot' in a client name
next if grep($_ eq $client, @clients); # we want this name once
push(@clients, $client);
}
close(PCLIST);
}
if (-t) {
print <<'EOT';
Enter message for Samba clients of this host
(terminated with single '.' or end of file):
EOT
while (<>) {
last if /^\.$/;
push(@message, $_);
}
}
else { # keep quiet and read message from stdin
@message = <>;
}
foreach(@clients) {
print "To $_:\n";
if (open(SENDMSG,"|$smbshout $_")) {
print SENDMSG @message;
close(SENDMSG);
}
else {
warn "Cannot notify $_ with $smbshout:\n$!\n";
}
}
exit 0;
==============================================================
Many thanks to the following people :
Alan Orndorff
Brooke King
Charles Nguyen
D'Arcey L Carroll
David Evans
David L. Markowitz
Deiter Gobbers
Eugene Kramer
Francis Liu
Harvey Wamboldt
John Horne
Kevin Sheehan
Lee Trujillo
Leif Erickson
Mark Neill
Ramindur Singh
Raymond Wong
Rodney C. Marable
Roger Fujii
Ronald Loftin
Sabrina Downard
Sean Quaint
Sebastian Benoit
Thomas Leitner
Thomas Lester
Thomas Lewis
Tim Pointing
W. Holzmann
Wales Wong
Rick Flower writes:
>
> Ok.. I fudged up and should've waited a bit longer before posting my
> summary.. I got ahead of myself! Anyway, I've found my problem with
> CDE users not being able to get broadcast messages IF they do not have
> a "console" window open. As it turns out, there were a few problems
> with the stock version of /usr/sbin/shutdown (which is what I was
> using and hadn't particularly checked -- as opposed to the "binary"
> ucb version). The changes I made are outlined below :
>
> o Changed the "notify" routine in /usr/sbin/shutdown to only
> use the "-a" argument to /usr/sbin/showmount and tossed out
> the illegal "-x" it was also using (I'm not sure what the -x
> did or WHY it was there!).
>
> o Changed the "notify" routine in /usr/sbin/shutdown to add
> the "-a" argument to the call for /usr/sbin/wall to ensure
> that we also get coverage to the PTY's (that gets the CDE
> people!)
>
> o Added a call to my smbwall script for Samba clients to ensure
> that all Samba users (non-interactive) are aware of system
> shutdowns.
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