diff options
| author | kay.sievers@vrfy.org <kay.sievers@vrfy.org> | 2005-02-10 09:35:52 +0100 |
|---|---|---|
| committer | Greg KH <gregkh@suse.de> | 2005-04-26 23:31:05 -0700 |
| commit | 27753a3cf74f9d665728e0e2c483435b1d72721f (patch) | |
| tree | 6c2bcd7b9f8847d9435d9bc7fc68cd08ebe711c4 /extras/volume_id/README | |
| parent | 69aa6dfb7081de376769cf712d1a8832f4346516 (diff) | |
[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.
Diffstat (limited to 'extras/volume_id/README')
| -rw-r--r-- | extras/volume_id/README | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/extras/volume_id/README b/extras/volume_id/README index 9d881a1a05..d570615e10 100644 --- a/extras/volume_id/README +++ b/extras/volume_id/README @@ -3,43 +3,37 @@ 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 specified by the environment variable -DEVPATH and searches for a filesystem superblock to read the label. The -following commandline switches are supported to specify what udev_volume_id +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 - -d read disk instead of partition - -If -d is specified udev_volume_id tries to read the label from the main -block device where the partition belongs to. For now this is only useful -for s390 dasd labels. 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", SYMLINK="%c" + 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]# DEVPATH=/block/hda/hda3 extras/volume_id/udev_volume_id + [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]# DEVPATH=/block/hda/hda3 extras/volume_id/udev_volume_id -l + [root@pim udev.kay]# extras/volume_id/udev_volume_id -l /dev/hda3 Music_Store - [root@pim udev.kay]# DEVPATH=/block/hda/hda1 extras/volume_id/udev_volume_id -t + [root@pim udev.kay]# extras/volume_id/udev_volume_id -t /dev/hda3 swap |