extras/volume_id/README

   1 vol_id - probe filesystem and read label and uuid
   2
   3 This program is normally called from a udev rule, to provide udev with the
   4 filesystem type of a volume and the label and uuid to name a device node.
   5 vol_id opens the blockdevice node specified at the commandline. The following
   6 commandline switches are supported to specify what vol_id should print:
   7   --export        export key/value pairs
   8   --type          filesystem type
   9   --label         filesystem label
  10   --label-raw     raw label
  11   --uuid          filesystem uuid
  12   --skip-raid     don't probe for raid
  13   --probe-all     find possibly conflicting signatures
  14   --help
  15
  16 vol_id will only return successful if the string asked for, is not
  17 empty. All trailing whitespace will be removed, spaces replaced by underscore
  18 and slashes ignored.
  19
  20 fstype                 probe  label  uuid  version
  21 --------------------------------------------------
  22 linux swap             *      *      *     *
  23 ext                    *      *      *     *
  24 reiserfs jr/3.5/3.6/4  *      *      *     *
  25 fat (12, 16, 32)       *      *      *     *
  26 ntfs                   *      *      *     *
  27 jfs                    *      *      *     -
  28 xfs                    *      *      *     -
  29 hfs (plus, wrapped)    *      *      *     -
  30 udf                    *      *      -     -
  31 iso9660                *      *      -     -
  32 ufs                    *      -      -     -
  33 cramfs                 *      *      -     -
  34 sysv                   *      *      -     *
  35 luks                   *      -      *     -
  36 hpfs                   *      -      -     -
  37 romfs                  *      *      -     -
  38 squashfs               *      -      -     -
  39 minix                  *      -      -     *
  40 ocfs (1, 2)            *      *      *     *
  41 vxfs                   *      -      -     *
  42 nss (netware)          *             *     *
  43 gfs, gfs2              *      *      -     -
  44
  45 Raid members are detected to prevent the probing for a filesystem
  46 -----------------------------------------------------------------
  47 linux raid (md)        *      *      *     *
  48 LVM 1                  *      -      -     -
  49 LVM 2                  *      -      -     *
  50 ddf                    *      -      *     *
  51 highpoint              *      -      -     -
  52 isw_raid               *      -      -     -
  53 lsi_raid               *      -      -     -
  54 nvidia_raid            *      -      -     -
  55 promise_raid           *      -      -     -
  56 silicon_raid           *      -      -     -
  57 via_raid               *      -      -     -
  58 jmicron                *      -      -     -
  59 adaptec                *      -      -     -
  60
  61 To give it a try, you may call it on the commandline:
  62   $ extras/volume_id/vol_id --export /dev/sda6
  63   ID_FS_USAGE=filesystem
  64   ID_FS_TYPE=ext3
  65   ID_FS_VERSION=1.0
  66   ID_FS_UUID=3e999973-00c9-4917-9442-b7633bd95b9e
  67   ID_FS_LABEL=devel
  68   ID_FS_LABEL_SAFE=devel
  69
  70   $ extras/volume_id/vol_id --label /dev/sda6
  71   devel
  72
  73   $ extras/volume_id/vol_id --type /dev/sda6
  74   ext3
  75
  76
  77 Any comment/questions/concerns to me:
  78   Kay Sievers <kay.sievers@vrfy.org>