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mirror of https://github.com/systemd/systemd.git synced 2024-12-25 01:34:28 +03:00
systemd/extras/volume_id
kay.sievers@vrfy.org 27753a3cf7 [PATCH] udev_volume_id: remove temporary node creation and parent handling
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.
2005-04-26 23:31:05 -07:00
..
volume_id [PATCH] udev_volume_id: remove __packed__ from dasd structure as it does not work 2005-04-26 23:31:02 -07:00
Makefile [PATCH] udev_volume_id: volume_id version 034 2005-04-26 23:26:14 -07:00
README [PATCH] udev_volume_id: remove temporary node creation and parent handling 2005-04-26 23:31:05 -07:00
s390-dasd.rules [PATCH] udev_volume_id update 2005-04-26 21:35:17 -07:00
udev_volume_id.c [PATCH] udev_volume_id: remove temporary node creation and parent handling 2005-04-26 23:31:05 -07:00

udev_volume_id - partition, filesystem, disklabel reader

This program is normally called from a udev rule, to provide udev with the
name, uuid or the filesystem type of a partition to name a device node.
udev_volume_id opens the blockdevice node specified at the commandline.
The following commandline switches are supported to specify what udev_volume_id
should print to stdout:

       no option prints all values
  -h   prints help text
  -l   prints the label of the partition
  -u   prints the uuid of the partition

udev_volume_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.

The following rule will create a symlink named with the label string:
  KERNEL="[hs]d*", PROGRAM="/sbin/udev_volume_id -l %N", SYMLINK="%c"

If no label is found udev_volume_id exits with nonzero and the rule will be
ignored.

To give it a try, you may call it on the commandline:

  [root@pim udev.kay]# extras/volume_id/udev_volume_id /dev/hda3
  T:ext3
  L:Music Store
  N:Music_Store
  U:d2da42b5-bbd9-44eb-a72c-cc4542fcb71e

  [root@pim udev.kay]# extras/volume_id/udev_volume_id -l /dev/hda3
  Music_Store

  [root@pim udev.kay]# extras/volume_id/udev_volume_id -t /dev/hda3
  swap


Please send any comment/questions/concerns to me or:
	linux-hotplug-devel@lists.sourceforge.net

Kay Sievers <kay.sievers@vrfy.org>