From: Frank Steiner <fsteiner-mail@bio.ifi.lmu.de>
To: linux-hotplug@vger.kernel.org
Subject: permissions: udev vs. pam_devperm.so
Date: Tue, 26 Oct 2004 06:37:28 +0000 [thread overview]
Message-ID: <417DF0A8.2060108@bio.ifi.lmu.de> (raw)
Hi,
when logging in via kdm on our SuSE, the pam_devperm module sets
permissions and owner of local devices like /dev/hdc (for cdrom). So
if user "bart" logs in, he get
brw------- 1 bart disk 22, 0 Sep 23 2003 /dev/hdc
But on some events like calling k3b etc., hotplug/udev sometimes jump
in (not always) an re-detect the block device /dev/hdc, thus setting
the permissions back to the defaults:
brw-rw---- 1 root disk 22, 0 Sep 23 2003 /dev/hdc
This stops user bart from accessing the cdrom for burning etc.
Can I tel udev to leave the permission of *existing* nodes untouched?
I figured out that I could set the line in the permissions file to
hdc*:::660
but the drawback is that udev will create /dev/hdc with the defaults
root:root and 600 like defined in udev.conf, and not with root:disk 660
like it should when no local user is logged in.
Any way to achieve that? Like a flag "leave node untouched if it exists"?
cu,
Frank
--
Dipl.-Inform. Frank Steiner Web: http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17 Phone: +49 89 2180-4049
80333 Muenchen, Germany Fax: +49 89 2180-99-4049
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next reply other threads:[~2004-10-26 6:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-26 6:37 Frank Steiner [this message]
2004-10-26 12:25 ` permissions: udev vs. pam_devperm.so Kay Sievers
2004-10-26 12:30 ` Frank Steiner
2004-10-26 13:16 ` Kay Sievers
2004-10-26 13:20 ` Frank Steiner
2004-10-26 13:49 ` Frank Steiner
2004-10-26 14:47 ` Kay Sievers
2004-10-26 14:57 ` Kay Sievers
2004-10-27 0:02 ` Kay Sievers
2004-10-27 5:59 ` Frank Steiner
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