Re: Simple Rule Now Broken in udev089

[Kay Sievers <kay.sievers@vrfy.org>]

On Fri, Apr 14, 2006 at 12:34:42AM +0000, Robert Kennedy wrote:
> >On Wed, Apr 12, 2006 at 11:17:08PM +0000, Robert Kennedy wrote:
> >> >On Wed, Apr 12, 2006 at 09:11:43PM +0000, Robert Kennedy wrote:
> >> >> >On Tue, Apr 11, 2006 at 09:49:43PM +0000, Robert Kennedy wrote:
> >> >> >>
> >> >> >> For awhile I have been using the following simple rule to create a
> >> >> >> persistent symlink for my removable CDRW burner:
> >> >> >>
> >> >> >> KERNEL="scd0", SYMLINK="cdrwiter"
> >> >> >>
> >> >> >> I placed this rule in 10-local.rules inside the /etc/udev/rules.d/
> >> >> >> directory.
> >> >> >>
> >> >> >> It used to work in previous version of udev but now it does not 
> >work.
> >> >> >udev
> >> >> >> is still creating the /dev/scd0 node but not the /dev/cdwriter 
> >node.
> >> >> >>
> >> >> >> Any ideas on what might be happening.    Has anything changed in 
> >udev
> >> >> >089?
> >> >> >
> >> >> >No, something like this works for me. But you should always use += 
> >to
> >> >> >add a new symlink to the list, otherwise you reset all earlier added
> >> >> >ones. Maybe there is a later rule that overwrites that one?
> >> >> >
> >
> >> >> Thanks for the tip Kay.  I tried changing the rule to:
> >> >>
> >> >> KERNEL="scd0", SYMLINK+="cdwriter"
> >> >>
> >> >> and then doing a udevstart but it did not work.  I still get a 
> >/dev/scd0
> >> >> node but not a /dev/cdwriter node.  Very strange.    I only have this
> >> >one
> >> >> rule in 10-local.rules.  10-local.rules should be the first file
> >> >processed
> >> >> in /etc/udev/rules.d/
> >> >
> >> >Are sure you have a scd* kernel device and not a sr*?
> >> >What does:
> >> >  ls -l /sys/block
> >> >show?
> >
> >> Thanks Kay.  I think we are getting close.  See the following:
> >>
> >> [root@myarch ~]# ls -l /sys/block
> >> total 0
> >
> >> drwxr-xr-x  3 root root 0 2006-04-12 16:58 sr0
> >>
> >> [root@myarch ~]# ls -l /dev/sr*
> >> ls: /dev/sr*: No such file or directory
> >>
> >> [root@myarch ~]# ls -l /dev/sc*
> >> brw-rw----  1 root optical 11, 0 2006-04-12 19:08 /dev/scd0
> >>
> >> [root@myarch ~]# ls -l /dev/sg*
> >> crw-rw----  1 root optical 21, 0 2006-04-12 19:08 /dev/sg0
> >>
> >> Even though the kernel shows it as a sr0 device, the /dev/sr0 is not 
> >being
> >> created but instead /dev/scd0 is being created.  Strange.
> >
> >Maybe you have a rule like Fedora is using, which may probably
> >better be converted to be symlink:
> >  # rename sr* to scd*
> >  KERNEL="sr[0-9]*", BUS="scsi", NAME="scd%n"
> >
> >> I tried changing the rule to
> >> KERNEL="sr0", SYMLINK+="cdwriter"
> >>
> >> and did a usevstart but that did not work either.
> >>
> >> I think I have a more fundamental problem to address -- i.e why is the
> >> /dev/sr0 not being created.
> >
> >Try:
> >  udevtest /block/sr0
> >
> >Kay
> >
> [root@myarch ~]# udevtest /block/sr0

> udev_rules_get_name: rule applied, 'sr0' becomes 'scd0'

You have a rule somewhere to rename the default kernel name
to scd*, that's why sr* never gets created.

Kay


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