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All files in /sys/class/pcmcia_socket/pcmcia_socket0/* are unreadable
without a card inserted:
read(3, 0x9167858, 4096) = -1 ENODEV (No such device)
So we need to skip that step for now.
Here we remove all the sysfs sleep loops from udev as wait_for_sysfs
will do this for us and any other hotplug user. We still keep a small
blacklist of subsystems we don't care about but any missing entry here
will no longer lead to a spinning udev waiting for files.
Hey, we got consistent source filenames today. Let's go ahead :)
I once started this ambitiuos curses gui to edit udev rules files.
udevruler still lays dead around in the tree. I will not finish it
and it is not really useful at his state. If nobody wants to do
something for it, I'm for deleting it.
> > > > That explains the spaces. What about stuff trailing %s, if %s does not
> > > > contain spaces. I.e, in the above example, model is ST336753LC and the
> > > > resulting device file is /dev/scsi_disks/some-proceding-stuff-
> > > > ST336753LC.
> > >
> > > I expect the model value has trailing spaces.
> > >
> > > You may look with:
> > > udevinfo -a -p /block/sdX
> >
> > Yes it does, and it seems for most SCSI devices, vendor and model will
> > have trailing spaces.
>
> It all depends on the vendor and model :)
>
> > I have included a patch to udev-036 to deal with
> > this issue. It trims off trailing whitespace for all sysfs attributes.
> > It might be better to trim off leading whitespace as well.
>
> We already trim it off when matching, but we also allow matching if you
> do put the spaces in there. This patch breaks that, right?
Correct, I have a new patch that trims after the comparison, so it
should work in both cases.
This patch fixes the reintroduced bug with the
sig_handler(), if we link against a -mregparm=3 compiled
klibc on i386.
It also fixes some compiler warnings about redefined
asmlinkage on some systems.
Also some (broken?) compilers on distros throw out warnings
if asmlinkage is before "static void". This fixes it, too.
This patch fixes two
warning: assignment from incompatible pointer type
asmlinkage is the reason for the warning. We can
simply cast to avoid it.
It also fixes this warning:
warning: implicit declaration of function `umask'
Here is the patch, that should prevent all of the known deadlocks with
corrupt tdb databases we discovered.
Thanks to Frank Steiner <fsteiner-mail@bio.ifi.lmu.de>, who tested all this
endlessly with a NFS mounted /dev. The conclusion is, that udev will not work
on filesystems without proper record locking, but we should prevent the
endless loops anyway. This patch implements:
o recovery from a corrupted udev database. udev will continue
without database support now, instead of doing nothing. So the node should
be generated in any case, remove will obviously not work for custom names.
o added iteration limits to the tdb-code at the places we discovered endless
loops. In the case tdb tries to find more than 100.000 entries with the
same hash, we better give up :)
o prevent a {all_partitions} loop caused by corrupt db data
o log all tdb errors to syslog
o switch sleep() to usleep() cause we want to use alarm()
Here is an update to wait_for_sysfs to print the udev version to syslog,
let hardware net interfaces wait again for the device link and
revert the video4linux to wait for the device. The error here was caused
by a out-of-tree media-driver, that needs the fix, not the our program.
I've added a small comment for that to the log as I expect more of this
to show up and the recent desktop integration work depends heavily on proper
sysfs support, so the drivers should be fixed.
Here is the correction for the dev.d/ scripts too. We should pass
the right argv[0] here too. A script may depend on the right value, as
udev does with udev/udevstart.
Here is the old version:
[pid 4692] execve("/etc/dev.d/default/log.dev", ["./udev", "block"], [/* 41 vars */]) = 0
this the new one:
[pid 9832] execve("/etc/dev.d/default/log.dev", ["/etc/dev.d/default/log.dev", "block"], [/* 41 vars */]) = 0
when udevstart was running we didn't set the environment and the
subsystem argument for the callouts the dev.d/ scripts.
Here is a fix, that sets that with every udevstart iteration, corrects
argv[0] to be the basename() only not the whole path and adds a test
for invoking callouts without arguments.
