Hi,
i believe to have found the udev rules in Debian 6 which
govern the population of /dev/disk/by-label.
File
/lib/udev/rules.d/60-persistent-storage.rules
has
# probe filesystem metadata of disks
KERNEL!="sr*", IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
...
ENV{ID_FS_LABEL_ENC}=="?*", ENV{ID_FS_USAGE}=="filesystem|other", \
SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"
I understand that if blkid sets variable ID_FS_LABEL_ENC to
a non-empty value, then this will become the link name in ./by-label.
The link target is the device that is being examined by the rule.
>From a USB stick with partition start LBA 1, i get:
$ /sbin/blkid -o udev -p /dev/sdb
ID_PART_TABLE_TYPE=dos
ID_FS_LABEL=epidemic-4.1-b1-1-ts-amd64
ID_FS_LABEL_ENC=epidemic-4.1-b1-1-ts-amd64
ID_FS_TYPE=iso9660
ID_FS_USAGE=filesystem
$ /sbin/blkid -o udev -p /dev/sdb1
$
So why the hell does /dev/sdb1 become link target ?
Its ID_FS_LABEL_ENC must be empty.
Any idea how to get a verbous log of these decisions ?
Have a nice day :)
Thomas
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