Re: Let init know user wants to shutdown

From: Pavel Machek <pavel@suse.cz>
To: Mike Castle <dalgoda@ix.netcom.com>, linux-kernel@vger.kernel.org
Subject: Re: Let init know user wants to shutdown
Date: Fri, 13 Apr 2001 00:29:21 +0000	[thread overview]
Message-ID: <20010413002920.C43@(none)> (raw)
In-Reply-To: <20010405000215.A599@bug.ucw.cz> <9b04food@ncc1701.cistron.net> <20010410164109.A1766@thune.mrc-home.com>
In-Reply-To: <20010410164109.A1766@thune.mrc-home.com>; from dalgoda@ix.netcom.com on Tue, Apr 10, 2001 at 04:41:09PM -0700

Hi!

> > >Init should get to know that user pressed power button (so it can do
> > >shutdown and poweroff). Plus, it is nice to let user know that we can
> > 
> > Not so hasty ;)
> > 
> > >+		printk ("acpi: Power button pressed!\n");
> > >+		kill_proc (1, SIGTERM, 1);
> 
> [reasons deleted]
> 
> Is using a signal the appropriate thing to do anyway?
> 
> Wouldn't there be better solutions?
> 
> Perhaps a mechanism a user space program can use to communicate to the kernel
> (ala arpd/kerneld message queues, or something like klogd).  Then a more
> general user space tool could be used that would do policy appropriate
> stuff, ending with init 0.

init _is_ the tool which is right for defining policy on such issues.

Take a look how UPS managment is handled.

-- 
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