Mailinglist Archive: opensuse (4054 mails)

[Roger Oberholtzer <roger@xxxxxx>]

Hello

I am making a udev rule for ttyS0, ttyS1 and ttyS2. The main thing I
want to do is set the permissions to rw for everybody.  The ports have
things like GPS receivers and VCRs attached. So there are no devices
SUSE Linux recognizes or has been told to use (afaik).

I see that my udev rules are installed correctly. The command
'udevtest /sys/class/tty/ttyS0 tty' lists:

	main: looking at device '/class/tty/ttyS0' from subsystem 'tty'
	main: opened class_dev->name='ttyS0'
	udev_rules_get_name: rule applied, 'ttyS0' becomes 'ttyS0'
	udev_rules_get_name: reset symlink list
	udev_rules_get_name: add symlink 'gps'
	create_node: creating device node '/dev/ttyS0', major = '4', minor =
'64', mode = '0666',
			uid = '0', gid = '14'
	create_node: creating symlink '/dev/gps' to 'ttyS0'

which looks fine (mode=0666 and symlink in place). I do the same for
ttyS1 and ttyS2, with similar results.

My problem is that ttyS0 (only) does not maintain the permissions and
owner. ttyS1 and ttyS2 do. The symlink for all remain.

	crw-------  1 roger uucp 4, 64 2006-01-18 11:21 /dev/ttyS0
	crw-rw-rw-  1 root  uucp 4, 65 2006-01-18 11:21 /dev/ttyS1
	crw-rw-rw-  1 root  uucp 4, 66 2006-01-18 11:21 /dev/ttyS2
	crw-rw----  1 root  uucp 4, 67 2006-01-18 11:21 /dev/ttyS3
	crw-rw----  1 root  uucp 4, 68 2006-01-18 11:21 /dev/ttyS4
	crw-rw----  1 root  uucp 4, 69 2006-01-18 11:21 /dev/ttyS5
	crw-rw----  1 root  uucp 4, 70 2006-01-18 11:21 /dev/ttyS6
	crw-rw----  1 root  uucp 4, 71 2006-01-18 11:21 /dev/ttyS7
	lrwxrwxrwx  1 root  root     5 2006-01-18 11:21 /dev/gps -> ttyS0
	lrwxrwxrwx  1 root  root     5 2006-01-18 11:21 /dev/photocell -> ttyS1
	lrwxrwxrwx  1 root  root     5 2006-01-18 11:21 /dev/vcr -> ttyS2

This means that someone somewhere is modifying the ttyS0 serial port
after udev sets it up.  But I do not know who. It is no software that I
have installed, as none of that runs. I do not have ppp installed
(unless it is some default activity set up by the SUSE 10 install). I
see that the port belongs to me, but I do not know why.

Any ideas?

--
Roger Oberholtzer