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cboscari
n00b
Joined: 11 Jan 2018
Posts: 4
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 Posted: Sat Jan 13, 2018 2:11 am Post subject: What's wrong with this short udev rules file? |
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I'm trying to learn udev rules scripting from Daniel Drake's how to, and I just don't understand why I'm not getting it.
My one rule file looks like this -
| Code: | | KERNEL=="sd*", SUBSYSTEMS=="scsi", ATTRS{model}=="Elements 107D ", SYMLINK+="testdrive", GROUP="users" |
from the output from this part of unvadm info -a -p /dev/sdb:
| Code: | looking at parent device '/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/host10/target10:0:0/10:0:0:0':
KERNELS=="10:0:0:0"
SUBSYSTEMS=="scsi"
DRIVERS=="sd"
ATTRS{evt_soft_threshold_reached}=="0"
ATTRS{evt_mode_parameter_change_reported}=="0"
ATTRS{inquiry}==""
ATTRS{evt_capacity_change_reported}=="0"
ATTRS{vendor}=="WD "
ATTRS{timeout}=="30"
ATTRS{evt_lun_change_reported}=="0"
ATTRS{evt_media_change}=="0"
ATTRS{queue_type}=="none"
ATTRS{device_busy}=="0"
ATTRS{eh_timeout}=="10"
ATTRS{dh_state}=="detached"
ATTRS{model}=="Elements 107D "
ATTRS{iocounterbits}=="32"
ATTRS{queue_depth}=="1"
ATTRS{type}=="0"
ATTRS{evt_inquiry_change_reported}=="0"
ATTRS{max_sectors}=="240"
ATTRS{iodone_cnt}=="0x8c"
ATTRS{state}=="running"
ATTRS{iorequest_cnt}=="0x8c"
ATTRS{rev}=="1065"
ATTRS{ioerr_cnt}=="0x13"
ATTRS{scsi_level}=="7"
ATTRS{device_blocked}=="0"
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The device label does not skow up in /dev. I'm aware about avoiding using attributes from different sections, I'm avoiding that but using different values from the same driver section still does not mount /dev/sdb at /dev/testdrive like I expect, let alone give me permissions. I unplug the USB drive between rule updates, I think that re-polls the device, but I might be wrong.
Thanks for any help. I never had to deal with anything more complicated than an fstab in the past...
[Moderator edit: added [code] tags to preserve output layout. -Hu] |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Sat Jan 13, 2018 4:01 am Post subject: |
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| "SUBSYSTEMS" looks like a typo, should be "SUBSYSTEM". Check the output of udevadm info /dev/sdb. |
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cboscari
n00b
Joined: 11 Jan 2018
Posts: 4
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| Posted: Sat Jan 13, 2018 4:31 am Post subject: |
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I changed it, but it didn't work. The output for the parent device, where the model name of the drive is located, says "SUBSYSTEMS=="scsi", but other devices use "SUBSYSTEM." I think I can only use attributes from the same device in a rule, but I'm still (trying) to learn how these rules file work. I'm off to a bad start.
Chris
UPDATE:
I used the command udevadm test --action="KERNEL" /sys/block/sdb as root and the rule *did* work. It seems to be a permissions issue? Why isn't udev processing this when the usb drive is inserted?
UPDATED: OK, I needed to run udevadm control reload. Now it is working. Also changed the KERNEL rule to ACTION=="add" so thanks everyone. |
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