Using devfs and udev at the same time ?

DISCUSSION Frédéric L. W. Meunier 2 participants 4 messages Dec 23, 2003

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Frédéric L. W. Meunier

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2003-12-23 18:33 UTC #0 lore raw

I'd like to know if it's possible to use devfs in /dev and udev in /udev at the same time, mainly for testing purposes.

It doesn't seem to or something is broken on my end. devfs works but I only get a .udev.tdb in /udev.

Or does it only work with devfs=nomount / no CONFIG_DEVFS_FS ?

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Greg KH

2003-12-23 22:18 UTC #1 lore raw

Quoted 5 lines · Frédéric L. W. Meunier

I'd like to know if it's possible to use devfs in /dev and udev in /udev at the same time, mainly for testing purposes.
It doesn't seem to or something is broken on my end. devfs works but I only get a .udev.tdb in /udev.

It should work just fine.

Quoted 1 line

Or does it only work with devfs=nomount / no CONFIG_DEVFS_FS ?

Nope, udev doesn't care and doesn't know anything about devfs.

Do you have CONFIG_HOTPLUG enabled? And have sysfs mounted on /sys or somewhere?

thanks,

greg k-h

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Frédéric L. W. Meunier

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2003-12-23 22:42 UTC #2 lore raw

In reply to Frédéric L. W. Meunier

Quoted 7 lines · Greg KH

Quoted 5 lines · Frédéric L. W. Meunier
I'd like to know if it's possible to use devfs in /dev and udev in /udev at the same time, mainly for testing purposes.
It doesn't seem to or something is broken on my end. devfs works but I only get a .udev.tdb in /udev.

Quoted 8 lines

It should work just fine.
Quoted 1 line
Or does it only work with devfs=nomount / no CONFIG_DEVFS_FS ?
Nope, udev doesn't care and doesn't know anything about devfs.
Do you have CONFIG_HOTPLUG enabled? And have sysfs mounted on /sys or somewhere?

Sorry for the false alarm. It happened after I installed 010 and by mistake also commented "export ACTIONd" in rc.udev since I'm on Slackware.

BTW, I'm not sure if it's a problem, but udev created ptmx with the following permissions:

crw------- 1 root root 5, 2 Dez 23 20:31 ptmx

devfs creates it with:

crw-rw-rw- 1 root root 5, 2 Dez 23 20:34 ptmx

devs-2.3.1-noarch-18.tgz from Slackware:

crw-rw-rw- 1 root tty 5, 2 Abr 21 1999 ptmx

Yesterday, when I booted with only udev screen didn't work as an user (No more PTYs). I got it working changing to 666. But then for some reason ssh and rxvt didn't work as an user, and I went back to devfs. I'll try to see what was wrong with the others.

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Greg KH

2003-12-23 22:48 UTC #3 lore raw

In reply to Frédéric L. W. Meunier

Quoted 9 lines · Frédéric L. W. Meunier

BTW, I'm not sure if it's a problem, but udev created ptmx with the following permissions:
crw------- 1 root root 5, 2 Dez 23 20:31 ptmx
devfs creates it with:
crw-rw-rw- 1 root root 5, 2 Dez 23 20:34 ptmx

Then add a udev.permissions entry for the ptmx file, or change the default mode in the udev.config file for all devices (which is the more dangerous situation.)

Either way, it's just a configuration issue :)

thanks,

greg k-h