[CentOS] Odd issue with custom udev rule at boot
James A. Peltier
jpeltier at sfu.ca
Thu Jun 16 15:26:45 UTC 2011
----- Original Message -----
| James A. Peltier wrote:
|
| > BTW: Can anyone try this to see if it is in fact a bug or not?
| >
| > Create a file called
| >
| > /etc/udev/rules.d/99-udev-override.rules
| >
| > that contains
| >
| > KERNEL=="tty[A-Z]*", GROUP="some_other_group_than_uucp",
| > MODE="0660", OPTIONS="last_rule"
| >
| > with mode of 0644 reboot and confirm that the group permissions
| > change or not. If you change the mode however you will see that the
| > mode *does* change.
|
| Works for me.
|
| Before:
|
| # ls -l /dev/ttyS*
| crw-rw---- 1 root uucp 4, 64 Jun 15 16:16 /dev/ttyS0
| crw-rw---- 1 root uucp 4, 65 Jun 15 16:16 /dev/ttyS1
| crw-rw---- 1 root uucp 4, 66 Jun 15 16:16 /dev/ttyS2
| crw-rw---- 1 root uucp 4, 67 Jun 15 16:16 /dev/ttyS3
|
| Created /etc/udev/rules.d/99-udev-override.rules containing:
|
| KERNEL=="tty[A-Z]*", GROUP="users", MODE="0660", OPTIONS="last_rule"
|
| After reboot:
|
| # ls -l /dev/ttyS*
| crw-rw---- 1 root users 4, 64 Jun 16 10:45 /dev/ttyS0
| crw-rw---- 1 root users 4, 65 Jun 16 10:45 /dev/ttyS1
| crw-rw---- 1 root users 4, 66 Jun 16 10:45 /dev/ttyS2
| crw-rw---- 1 root users 4, 67 Jun 16 10:45 /dev/ttyS3
|
| However, if I use a group name that isn't in /etc/groups (but is
| defined
| in say NIS), then the group is set to root after a reboot - but using
| the GID of that group works.
|
| James Pearson
AHA! We use NIS here and I didn't even think that it wouldn't set the GROUP properly if it couldn't resolve it properly. James, you're brilliant! That fixed it.
:)
--
James A. Peltier
IT Services - Research Computing Group
Simon Fraser University - Burnaby Campus
Phone : 778-782-6573
Fax : 778-782-3045
E-Mail : jpeltier at sfu.ca
Website : http://www.sfu.ca/itservices
http://blogs.sfu.ca/people/jpeltier
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