Public SourceMage Discussion List

[Seth Woolley <seth AT tautology.org>]

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Understood, but it's a lot more fun when you don't use the rtc device and
just use bash and date.

lines 428ff of simpleinit.c from simpleinit-msb-1.1:

        if ( ( initctl_fd = open (initctl_name, O_RDWR|O_NONBLOCK, 0) ) < 0 ) 
{
                mkfifo (initctl_name, S_IRUSR | S_IWUSR);
                if ( ( initctl_fd = open (initctl_name, O_RDWR|O_NONBLOCK, 0) 
) < 0 )
                        err ( _("error opening fifo\n") );
        }
        fcntl(initctl_fd,F_SETFD,FD_CLOEXEC); /*make sure no one inherits the 
fd*/

so it tries to open it, otherwise, it creates the fifo and then reopens
it, and then it last sets its fcntl options.  bash can do as much.
(initctl_name is "/dev/initctl")

Seth

On Thu, 9 Oct 2003, Paul Mahon wrote:

> No, the rtc device has a few k of extra memory, that's what I was
> talking about.
>
> On Thu, 2003-10-09 at 17:16, Seth Woolley wrote:
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> >
> > Current init uses a fifo/named pipe on /dev/initctl -- I'm not sure how
> > this works with devfs, but it appears to work.  I can look into the source
> > code on how it does this exactly in a bit if somebody doesn't beat me to
> > it while I'm at work. I'm sure afrayednot's stuff can use that pipe, eh?
> >
> > If we save the clock time right away, we can minuplate the clock value
> > (though it is slightly volatile, esp. in seconds field) and gain some few
> > extra bits from that.
> >
> > Seth
> >
> > P.S.  Yes, Java and XML would be great.  Then we can have the boot screen
> > use the gecko rendering engine SVG-enabled and display trees of
> > depenedencies and stuff in SVG.  A bit custom, but all-in-all a great
> > idea and we should look into it.
> >
> > On Thu, 9 Oct 2003, Paul Mahon wrote:
> >
> > > No, Python is soo amaturish. We should use Java and change the
> > > simpleinit scripts to XML.
> > > afrayednot's stuff requires a FS. I'm not sure if it actualy writes to
> > > the file, but the file must exist.
> > >
> > > Could we use the clock memory?
> > >
> > >
> > > On Thu, 2003-10-09 at 16:20, Seth Woolley wrote:
> > > > -----BEGIN PGP SIGNED MESSAGE-----
> > > > Hash: SHA1
> > > >
> > > > I'd rather fork off a daemon and do ipc to it... maybe use 
> > > > afrayednot's
> > > > ipc tools if not bash...
> > > >
> > > > or we could do it all in python ;)
> > > >
> > > > There's also nvram we could use :)
> > > >
> > > > Seth
> > > >
> > > > On Thu, 9 Oct 2003, Paul Mahon wrote:
> > > >
> > > > > You're right, it's not required for anything. henh, you could mount 
> > > > > the
> > > > > swap partition as ext2 until there's a real FS... ;)
> > > > >
> > > > > On Thu, 2003-10-09 at 03:22, Robert Helgesson wrote:
> > > > > > On Thu, Oct 09, 2003 at 02:23:34 -0500, Paul Mahon wrote:
> > > > > > > I don't suppse it would be possible to mount a tmpfs system 
> > > > > > > right at the
> > > > > > > start?
> > > > > >
> > > > > > Yes, that would probably work, but I'm not sure that it's safe to 
> > > > > > assume
> > > > > > tmpfs being available on all smgl installations. Is tmpfs 
> > > > > > required by
> > > > > > anything else?
> > > > > >
> > > > > > > On Thu, 2003-10-09 at 00:25, Robert Helgesson wrote:
> > > > > > > > On Wed, Oct 08, 2003 at 23:41:53 -0500, Paul Mahon wrote:
> > > > > > > > > I don't know how the init stuff actualy works, so the no FS 
> > > > > > > > > limitation
> > > > > > > > > may not be as bad. Good ideas though.
> > > > > > > >
> > > > > > > > It is as bad as you can imagine and worse. Being limited to no
> > > > > > > > read/write fs access and no /usr can be quite frustrating at 
> > > > > > > > times :)
> > > > > --
> > > > > De mortuis nihil nisi bonum.
> > > > >
> > > > > What is that funny looking stuff in the attachment?
> > > > > http://www.technomom.com/cynthia/pgp/
> > > > >
> > > >
> > > > - --
> > > > Seth Alan Woolley <seth at tautology.org>, SPAM/UCE is unauthorized
> > > > Key id 7BEACC7D = 2978 0BD1 BA48 B671 C1EB 93F7 EDF4 3CDF 7BEA CC7D
> > > > Full Key at seth.tautology.org and pgp.mit.edu. info: www.gnupg.org
> > > > -----BEGIN PGP SIGNATURE-----
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> > > > PJMiIKnfD5Gu7sha4y7RqcY=
> > > > =ACup
> > > > -----END PGP SIGNATURE-----
> > > >
> > > > _______________________________________________
> > > > SM-Discuss mailing list
> > > > SM-Discuss AT lists.ibiblio.org
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> > > --
> > > De mortuis nihil nisi bonum.
> > >
> > > What is that funny looking stuff in the attachment?
> > > http://www.technomom.com/cynthia/pgp/
> > >
> >
> > - --
> > Seth Alan Woolley <seth at tautology.org>, SPAM/UCE is unauthorized
> > Key id 7BEACC7D = 2978 0BD1 BA48 B671 C1EB 93F7 EDF4 3CDF 7BEA CC7D
> > Full Key at seth.tautology.org and pgp.mit.edu. info: www.gnupg.org
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> > iD8DBQE/hd5e7fQ833vqzH0RAnfpAJ9fpTCSZa5+vcZ3c1/FhTnT5gHPjgCfVVc+
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> > =Zms6
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> > _______________________________________________
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> --
> De mortuis nihil nisi bonum.
>
> What is that funny looking stuff in the attachment?
> http://www.technomom.com/cynthia/pgp/
>

- --
Seth Alan Woolley <seth at tautology.org>, SPAM/UCE is unauthorized
Key id 7BEACC7D = 2978 0BD1 BA48 B671 C1EB 93F7 EDF4 3CDF 7BEA CC7D
Full Key at seth.tautology.org and pgp.mit.edu. info: www.gnupg.org
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