[9fans] /tmp in "ram disk"

[9fans] /tmp in "ram disk"

[ron minnich]

How do you create entries in the "ram disk" that plan 9 boots with,
i.e. where in the
pccpu
or whatever would I put an entry such that I get a
/tmp
directory when it comes up?

I'm sure it's obvious but I can't quite find it ...

thanks

ron

Re: [9fans] /tmp in "ram disk"

[erik quanstrom]

the stuff in /tmp is not in a ramdisk but in eve's $home/tmp.

if you want to build stuff into the kernel which will appear in /boot,
you need to modify the bootdir section of the kernel template in
/sys/src/9/$arch/$templatename, where $templatename is probablly pccpu
or similar.

- erik

Re: [9fans] /tmp in "ram disk"

[Richard Miller]

> i.e. where in the
> pccpu
> or whatever would I put an entry such that I get a
> /tmp
> directory when it comes up?

/sys/src/9/port/devroot.c:94,107

Re: [9fans] /tmp in "ram disk"

[ron minnich]

On 5/31/07, Richard Miller <9fans@hamnavoe.com> wrote:
> > i.e. where in the
> > pccpu
> > or whatever would I put an entry such that I get a
> > /tmp
> > directory when it comes up?
>
> /sys/src/9/port/devroot.c:94,107
>
>

I sleazed out and put an addrootdir("tmp") in devroot.c. It was the
easiest way out,
and that seems to be how it's done.

What I've got is a very limited node, security not an issue. I need a
ramfs, but I want a /tmp there for it. Simple stuff.

thanks

ron

Re: [9fans] /tmp in "ram disk"

[andrey mirtchovski]

can't you mount ramfs on / (before) and then create tmp inside ramfs?

On May 31, 2007, at 1:07 PM, ron minnich wrote:

> On 5/31/07, Richard Miller <9fans@hamnavoe.com> wrote:
>> > i.e. where in the
>> > pccpu
>> > or whatever would I put an entry such that I get a
>> > /tmp
>> > directory when it comes up?
>>
>> /sys/src/9/port/devroot.c:94,107
>>
>>
>
> I sleazed out and put an addrootdir("tmp") in devroot.c. It was the
> easiest way out,
> and that seems to be how it's done.
>
> What I've got is a very limited node, security not an issue. I need a
> ramfs, but I want a /tmp there for it. Simple stuff.
>
> thanks
>
> ron

Re: [9fans] /tmp in "ram disk"

[ron minnich]

On 5/31/07, andrey mirtchovski <andrey@lanl.gov> wrote:
> can't you mount ramfs on / (before) and then create tmp inside ramfs?

Yes, I have also done this in the past. It gets kind of weird because
ramfs is one level ... at least that's my memory. So you can mkdir in
ramfs but things don't appear where you expect them to.

Or is my memory that bad?

OK, I'll try that once the machine I'm on comes back. It "went away"

ron

Re: [9fans] /tmp in "ram disk"

[Richard Miller]

> What I've got is a very limited node, security not an issue. I need a
> ramfs, but I want a /tmp there for it. Simple stuff.

You could also have used the little-known aux/stub command to make a /tmp.