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We never used any of the libsysfs convenience features. Here we replace
it completely with 300 lines of code, which are much simpler and a bit
faster cause udev(d) does not open any syfs file for a simple event which
does not need any parent device information.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
FAT32 volumes should never have a cluster count, that fits
into a 16 bit value, but mkdosfs can create such volumes.
No sane formatter or Windows will ever do this, but the
Linux kernel as Windows can read/write it.
Thanks to Ted Ts'o <tytso@mit.edu> for convincing me.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
After beeing hit by proprietary applications which statically
link the LGPL'd libusb, which needs a patch to reflect the recent
kernel changes, I decided not to provide LGPL code anymore.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
vol_id segfaults if read() fails on broken devices reporting
the wrong size.
Thanks to Erhard Schultchen for the debugging.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Solaris uses volume_id now and they fiddled around with configure scripts
to map the linux kernel int types. Adding the types locally to volume_id
breaks the klibc build, so just switch to these ugly types and forget it. :)
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Any program can query with udevinfo for persistent device
attributes evaluated on device discovery now.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
udev can create the temporary node for us now. (On bootup we don't
know where a writable filesystem is mounted). Also the parent handling
is not needed anymore, cause udev is able to pass us the node name
of the parent device.
The -d option in udev_allows to go from a partition to the underlying disk
for s390 dasd labels. If the device is already the disk itself, finding the
parent will fail, therefore -d on /sys/block/dasda/ for example gives no
result at all.
Fix FAT label reading bug for very large volumes.
Recognize FAT label at Win98 formatted volumes.
Read iso9660 joliet descriptor for unicode labels.
Support uuid/label of swap partitions.
Let's try it another way:
We define BLKGETSIZE64 in udev-volume_id.c now, cause including <fs.h>
does also not work with klibc. This hopefully fixes your compile problem
too.
Also included is an update to udev_volume_id with the latest fixes for
volume_id. It adds a simple logging file to map the debug function, that
we can use exactly the same files in HAL and udev.
Here is an update for the volume_id callout to catch up to the latest
and greatest:
o It is able to skip the label reading of linux raid members, which are
otherwise recognized as a normal filesystem.
o It reads FAT labels stored in the directory instead of the
superblock (Windows only writes in the directory).
o The NTFS uuid is the right one now.
o It reads all the Apple HFS(+) formats with the labels.
o UFS volumes are recognized but no labels are extracted.
o We use CFLAGS+=-D_FILE_OFFSET_BITS=64 instead of lsee64() which may fix
a bug mentioned on the klibc mailing list.
A lot of other new features are only used in HAL and not needed in this
simple callout. But if someone stumbles over it and want's to send a patch
for some exotic formats, we better keep it up to date :)
volume_id is now able to read NTFS labels. Not very exciting, but we
keep up to date with the version in HAL. Also __packed__ was needed for
the structs, cause the gcc 3.4 compiled version was no longer working
properly.
Here is a update to extras/volume_id/*
o The device is now specified by the DEVPATH in the environment,
it's no longer needed to pass the major/minor to the callout.
o leading spaces and slashes are now removed from the returned string
and spaces are replaced by underscore, to not to confuse udev.
o Arnd Bergmann <arnd@arndb.de> provided the code to recognize s390
dasd disk labels. The -d switch tries to read the main block device
instead of the partition.
On Fri, Apr 30, 2004 at 03:29:54PM -0700, Greg KH wrote:
> On Thu, Apr 29, 2004 at 11:04:46PM +0200, Kay Sievers wrote:
> > Hi,
> > here is a small udev toy, which enables udev to name partitions by
> > its filesystem label or uuid's.
> >
> > The following udev rule:
> >
> > KERNEL="sd*", PROGRAM="/sbin/udev_volume_id -M%M -m%m -u", SYMLINK="%c"
> >
> > creates a symlink with the uuid read from the filesystem. If no label or
> > uuid is found the program exits with nonzero and the rule will fail.
> >
> > ext2, ext3, reiserfs, xfs, jfs, vfat, msdos volume labels are supported,
> > ntfs and swap partitions can be recognized.
> >
> > It's possible to compile with klibc and the static binary takes 13kb.
>
> Very nice, I was wondering who was going to use that library to make
> such a tool. This is even better as we can use klibc for it.
Here is a update, which supports iso9660 and udf labels.
Not very useful in the udev case, but I've added it for hal,
so we just catch up with the latest version.
here is a small udev toy, which enables udev to name partitions by
its filesystem label or uuid's.
The following udev rule:
KERNEL="sd*", PROGRAM="/sbin/udev_volume_id -M%M -m%m -u", SYMLINK="%c"
creates a symlink with the uuid read from the filesystem. If no label or
uuid is found the program exits with nonzero and the rule will fail.
ext2, ext3, reiserfs, xfs, jfs, vfat, msdos volume labels are supported,
ntfs and swap partitions can be recognized.
It's possible to compile with klibc and the static binary takes 13kb.
