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vol_id - probe filesystem and read label and uuid
This program is normally called from a udev rule, to provide udev with the
filesystem type of a volume and the label and uuid to name a device node.
vol_id opens the blockdevice node specified at the commandline. The following
commandline switches are supported to specify what vol_id should print:
--export export key/value pairs
--type filesystem type
--label filesystem label
--label-raw raw label
--uuid filesystem uuid
--skip-raid don't probe for raid
--probe-all find possibly conflicting signatures
--help
vol_id will only return successful if the string asked for, is not
empty. All trailing whitespace will be removed, spaces replaced by underscore
and slashes ignored.
fstype probe label uuid version
--------------------------------------------------
linux swap * * * *
ext * * * *
reiserfs jr/3.5/3.6/4 * * * *
fat (12, 16, 32) * * * *
ntfs * * * *
jfs * * * -
xfs * * * -
hfs (plus, wrapped) * * * -
udf * * - -
iso9660 * * - -
ufs * - - -
cramfs * * - -
sysv * * - *
luks * - * -
hpfs * - - -
romfs * * - -
squashfs * - - -
minix * - - *
ocfs (1, 2) * * * *
vxfs * - - *
nss (netware) * * *
gfs, gfs2 * * * -
oracleasm * * - -
Raid members are detected to prevent the probing for a filesystem
-----------------------------------------------------------------
linux raid (md) * * * *
LVM 1 * - - -
LVM 2 * - - *
ddf * - * *
highpoint * - - -
isw_raid * - - -
lsi_raid * - - -
nvidia_raid * - - -
promise_raid * - - -
silicon_raid * - - -
via_raid * - - -
jmicron * - - -
adaptec * - - -
To give it a try, you may call it on the commandline:
$ extras/volume_id/vol_id --export /dev/sda6
ID_FS_USAGE=filesystem
ID_FS_TYPE=ext3
ID_FS_VERSION=1.0
ID_FS_UUID=3e999973-00c9-4917-9442-b7633bd95b9e
ID_FS_LABEL=devel
ID_FS_LABEL_SAFE=devel
$ extras/volume_id/vol_id --label /dev/sda6
devel
$ extras/volume_id/vol_id --type /dev/sda6
ext3
Any comment/questions/concerns to me:
Kay Sievers <kay.sievers@vrfy.org>
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