Subject: Re: The new rc.d stuff...
To: John Nemeth <firstname.lastname@example.org>
From: Andrew Brown <email@example.com>
Date: 04/23/2000 16:24:37
>} Which don't mean a thing when you type shutdown, you end up crafting
>} your own shutdown scripts to shut things down properly before the
>} system goes down. Do you think an Oracle database takes kindly to
>} getting hit with a HUP signal and then being clobbered by a KILL a
>} little while later? If that is too high faluting for you, what about
> Actually, it would be TERM followed by KILL, and if it doesn't
>take kindly, then it is broken! In fact, there is no guarantee of a
>chance to do a clean shutdown due to things like (sudden power failure,
>hardware failure, kernel panic, idiotic kernel which oversubscribes
>swap killing processes at random, sysadmin doing 'kill -9' on wrong
>process, etc.). In otherwords, it better be prepared to go down
>without notice and have some way of coming up cleanly. Anything less
>is a major design flaw. There is no excuse for not shutting down
>properly upon receipt of TERM.
unless you're using every signal for some other asynchronous messaging
system. see any version of bind from before the advent of the ndc
>} >Forward? To what? To runlevels? You're scaring me.
>} Feh - you have two at the moment, Single user and multi-user.
> And, that is enough.
we have more than that.
0) halted (shutdown -h or halt, wait for "press any key...")
1) single user (kill 1 or boot -s)
3) multi user (a normal boot scenario)
5) power down (shutdown -p or halt -p, for systems that support it)
6) rebooting (shutdown -r or reboot)
these are all discrete run-levels (as above) in solaris. they just
don't have the numbers associated with them in netbsd. solaris also
has 2 (like 3, but without nfs), 4 (and alternate 3), q or Q (which is
the same as kill -1 1), and s or S (which looks very similar to 1).
the only other thing solaris does is have *other* jobs that run at the
various init levels that are started (or stopped) via inittab when at
a specific run-level.
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