udevstart problem

udevstart problem

[Nico Schottelius]

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Hello!

I am trying to use udev with an empty /dev.

It works more or less good, when mounting /sys and then
runnig udevstart. But udevstart does not produce
/dev/null nor /dev/urandom.

Is that a bug or is it wanted that I create/mknod them myself?

Nico

Please CC me, I am not subscribed.

-- 
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Re: udevstart problem

[Marco d'Itri]

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On Nov 07, Nico Schottelius <nico-linux-udev@schottelius.org> wrote:

> It works more or less good, when mounting /sys and then
> runnig udevstart. But udevstart does not produce
> /dev/null nor /dev/urandom.
You need a newer kernel.

-- 
ciao, |
Marco | [9035 mi4bOGc8z79Cs]

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Re: udevstart problem

[Nico Schottelius]

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Marco d'Itri [Sun, Nov 07, 2004 at 03:37:12PM +0100]:
> On Nov 07, Nico Schottelius <nico-linux-udev@schottelius.org> wrote:
> 
> > It works more or less good, when mounting /sys and then
> > runnig udevstart. But udevstart does not produce
> > /dev/null nor /dev/urandom.
> You need a newer kernel.

Why is this kernel dependend?

Newer than 2.6.9? This means I have to wait for 2.6.10?

Nico


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Keep it simple & stupid, use what's available.
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Re: udevstart problem

[Marco d'Itri]

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On Nov 08, Nico Schottelius <nico-linux-udev@schottelius.org> wrote:

> > > It works more or less good, when mounting /sys and then
> > > runnig udevstart. But udevstart does not produce
> > > /dev/null nor /dev/urandom.
> > You need a newer kernel.
> Why is this kernel dependend?
> 
> Newer than 2.6.9? This means I have to wait for 2.6.10?
Because older kernels did not have sysfs support for these devices, but
2.6.9 is definitely OK. So I have no clue about your problem, sorry.

-- 
ciao, |
Marco | [9066 apHpcnMSrj58Y]

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Re: udevstart problem

[Kay Sievers]

On Sun, 2004-11-07 at 15:07 +0100, Nico Schottelius wrote:
> Hello!
> 
> I am trying to use udev with an empty /dev.
> 
> It works more or less good, when mounting /sys and then
> runnig udevstart. But udevstart does not produce
> /dev/null nor /dev/urandom.
> 
> Is that a bug or is it wanted that I create/mknod them myself?

It should be created by udevstart. What does:

  [kay@pim ~]$ udevtest /class/mem/null
  version 043
  looking at '/class/mem/null'
  parse error /etc/udev/rules.d/50-udev.rules, line 76:31, rule skipped
  configured rule in '/etc/udev/rules.d/50-udev.rules' at line 49 applied, added symlink 'XOR'
  creating device node '/dev/null', major = '1', minor = '3', mode = '020666', uid = '0', gid = '0'

print for you?

Kay



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Re: udevstart problem

[Nico Schottelius]

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Kay Sievers [Mon, Nov 08, 2004 at 08:36:53PM +0100]:
> On Sun, 2004-11-07 at 15:07 +0100, Nico Schottelius wrote:
> > Hello!
> > 
> > I am trying to use udev with an empty /dev.
> > 
> > It works more or less good, when mounting /sys and then
> > runnig udevstart. But udevstart does not produce
> > /dev/null nor /dev/urandom.
> > 
> > Is that a bug or is it wanted that I create/mknod them myself?
> 
> It should be created by udevstart. What does:
> [...]
> print for you?

No:

[22:10] scice:/etc/minit# /usr/packages/udev-040/usr/bin/udevtest /sys/class/mem/null/
version 040
looking at '/sys/class/mem/null/'
zsh: segmentation fault  /usr/packages/udev-040/usr/bin/udevtest /sys/class/mem/null/

As I see you are using 043, I'll retry that...

[22:23] scice:~/udev-043# /usr/bin/udevtest /sys/class/mem/null/
version 043
looking at '/sys/class/mem/null/'
sysfs_open_class_device_path failed

Oops found my mistake:

[22:23] scice:~/udev-043# /usr/bin/udevtest /class/mem/null/
version 043
looking at '/class/mem/null/'
creating device node '/udev/null', major = '1', minor = '3', mode = '020600', uid = '0', gid = '0'

Is it possible to strip a leading '/sys', if specified? Would make life
for me (user/tester) easier.

I'll try to reboot and look if /dev/null und /dev/urandom than exist.

Nico

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Re: udevstart problem

[Nico Schottelius]

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Nico Schottelius [Mon, Nov 08, 2004 at 10:26:45PM +0100]:
> [...] 
> I'll try to reboot and look if /dev/null und /dev/urandom than exist.

Yes, everything's there. Working fine!

But there is another problem:

I want to run udevstart at system startup. I am using
minit[0,1], which starts programs with links:

ln -s /sbin/udevstart run

When calling run, it looks like udevstart (which is a link to udev)
looks at argv[0].

Can we change that and make two programs of it or add
a parameter "-s" for start to udev?

Nico

-- 
Keep it simple & stupid, use what's available.
Please use pgp encryption: 8D0E 27A4 is my id.
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Re: udevstart problem

[Kay Sievers]

On Tue, 2004-11-09 at 22:39 +0100, Nico Schottelius wrote:
> Nico Schottelius [Mon, Nov 08, 2004 at 10:26:45PM +0100]:
> > [...] 
> > I'll try to reboot and look if /dev/null und /dev/urandom than exist.
> 
> Yes, everything's there. Working fine!
> 
> But there is another problem:
> 
> I want to run udevstart at system startup. I am using
> minit[0,1], which starts programs with links:
> 
> ln -s /sbin/udevstart run

Yes, but minit uses the the link target and passes it as argv[0]. So
this should work. If not, just wrap it in a two line shell script that
does an exec udevstart.

> When calling run, it looks like udevstart (which is a link to udev)
> looks at argv[0].
> 
> Can we change that and make two programs of it or add
> a parameter "-s" for start to udev?

I will add a parameter. I miss that too, cause you need to create the
link in the source tree just to test udevstart.

Thanks,
Kay



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Re: udevstart problem

[Nico Schottelius]

Kay Sievers [Wed, Nov 10, 2004 at 01:06:26AM +0100]:
> On Tue, 2004-11-09 at 22:39 +0100, Nico Schottelius wrote:
> > Nico Schottelius [Mon, Nov 08, 2004 at 10:26:45PM +0100]:
> > [...]
> > I want to run udevstart at system startup. I am using
> > minit[0,1], which starts programs with links:
> > 
> > ln -s /sbin/udevstart run
> 
> Yes, but minit uses the the link target and passes it as argv[0]. So
> this should work. If not, just wrap it in a two line shell script that
> does an exec udevstart.

Didn't know that minit does that, will have to look into the source
to be able to verify that. The second solution is the one I am 
currently using, but which is imho dirty, as it starts an additional
shell (which will effectively slow down the boot process some
mili-seconds).
 
> > When calling run, it looks like udevstart (which is a link to udev)
> > looks at argv[0].
> > 
> > Can we change that and make two programs of it or add
> > a parameter "-s" for start to udev?
> 
> I will add a parameter. I miss that too, cause you need to create the
> link in the source tree just to test udevstart.

That sounds very good! As soon as you realesed that,
I'll try it (I see I should subscribe to the ML in the near future).

Just found another interesting thing: The default
permissions file is very small, not covering null, zero,
pty* and so on. Is there a place you maintain
bigger samples or are you interested in having, which can be used
for productive systems?

Nico


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Re: udevstart problem

[Marco d'Itri]

On Nov 10, Nico Schottelius <nico-linux-udev@schottelius.org> wrote:

> Just found another interesting thing: The default
> permissions file is very small, not covering null, zero,
> pty* and so on. Is there a place you maintain
> bigger samples or are you interested in having, which can be used
> for productive systems?
In the source tarball there are example permissions files provided by
major distributions, so I suggest I look at the udev package for your
distribution of choice.

-- 
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Marco | [9111 scv.xQcF/6tf.]


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