X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=extras%2Fvolume_id%2FREADME;h=974a5016d9e1f5cdafd781cf3c08eb722d325337;hb=0e47c219fc5c509f277c9a44f2d29362fff88193;hp=9d881a1a05e6208d37fc0cd0c2c8f4fb54488a6d;hpb=cde5a756ce10530136b8d387346c48260a69dbfb;p=elogind.git diff --git a/extras/volume_id/README b/extras/volume_id/README index 9d881a1a0..974a5016d 100644 --- a/extras/volume_id/README +++ b/extras/volume_id/README @@ -1,49 +1,72 @@ - -udev_volume_id - partition, filesystem, disklabel reader +vol_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 -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 +vol_id opens the blockdevice node specified at the commandline. +The following commandline switches are supported to specify what vol_id +should print: + + --export prints all values + -h prints help text + -l prints the label of the partition + -u prints the uuid of the partition + +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 fsversion +---------------------------------------------------- +ext * * * * +reiserfs jr/3.5/3.6/4 * * * * +fat (12, 16, 32) * * * * +ntfs * * * * +jfs * * * - +xfs * * * - +hfs (plus, wrapped) * * * - +udf * * - - +iso9660 * * n/a - +ufs * - - - +linux swap * * * * +LVM 1 * - - - +LVM 2 * - - * +linux raid * - * * +cramfs * * - - +sysv * * - * +luks * - * - +hpfs * - - - +romfs * +minix * +highpoint * +isw_raid * +lsi_raid * +nvidia_raid * +promise_raid * +silicon_raid * +via_raid * +mac partitons * +msdos partitions * + + 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/vol_id -l %N", SYMLINK+="%c" -If no label is found udev_volume_id exits with nonzero and the rule will be +If no label is found vol_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/vol_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/vol_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/vol_id -t /dev/hda3 swap -Please send any comment/questions/concerns to me or: - linux-hotplug-devel@lists.sourceforge.net - +Any comment/questions/concerns to me: Kay Sievers