Karel Zak wrote:
On Wed, Apr 28, 2010 at 03:08:02PM -0600, Curtis Gedak wrote:
Jim Meyering wrote:
Curtis Gedak wrote:
My testing using blkid to detect file systems on devices with a 4096
byte sector size has proven quite promising. One difference of note
is that blkid does not display an entry for extended partitions.
Do you mean that libblkid does not display a file system type for
an msdos extended partition? That makes sense, since the
extended partition is just a container for other partitions,
and hence has no file system of its own.
I have not worked with the libblkid library directly myself. It might
or might not recognize an msdos partition table extended partition.
My observation is that the blkid command will not return any textual
information if run on an extended partition.
It depends on version, from the current git tree:
# blkid -p -o udev /dev/sda2
ID_PART_ENTRY_SCHEME=dos
ID_PART_ENTRY_TYPE=0x5
ID_PART_ENTRY_TYPE_ENC=0x5
ID_PART_ENTRY_NUMBER=2
anyway, I don't think this is important detail for parted. The
libparted has all necessary information to probe for filesystems on
proper devices.
Karel
Thank you Karel for providing the options to determine an extended
partition using blkid. It is always good to know how to make this
determination in case I need this while enhancing GParted to support
sector sizes > 512 bytes.
Regards,
Curtis Gedak
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