27753a3cf7
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.
44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
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udev_volume_id - partition, filesystem, disklabel reader
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This program is normally called from a udev rule, to provide udev with the
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name, uuid or the filesystem type of a partition to name a device node.
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udev_volume_id opens the blockdevice node specified at the commandline.
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The following commandline switches are supported to specify what udev_volume_id
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should print to stdout:
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no option prints all values
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-h prints help text
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-l prints the label of the partition
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-u prints the uuid of the partition
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udev_volume_id will only return successful if the string asked for, is not
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empty. All trailing whitespace will be removed, spaces replaced by underscore
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and slashes ignored.
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The following rule will create a symlink named with the label string:
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KERNEL="[hs]d*", PROGRAM="/sbin/udev_volume_id -l %N", SYMLINK="%c"
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If no label is found udev_volume_id exits with nonzero and the rule will be
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ignored.
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To give it a try, you may call it on the commandline:
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[root@pim udev.kay]# extras/volume_id/udev_volume_id /dev/hda3
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T:ext3
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L:Music Store
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N:Music_Store
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U:d2da42b5-bbd9-44eb-a72c-cc4542fcb71e
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[root@pim udev.kay]# extras/volume_id/udev_volume_id -l /dev/hda3
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Music_Store
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[root@pim udev.kay]# extras/volume_id/udev_volume_id -t /dev/hda3
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swap
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Please send any comment/questions/concerns to me or:
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linux-hotplug-devel@lists.sourceforge.net
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Kay Sievers <kay.sievers@vrfy.org>
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