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November 2013

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Subject:
UDEV, USB no action="remove"
From:
Andrew Z <[log in to unmask]>
Reply To:
Andrew Z <[log in to unmask]>
Date:
Fri, 1 Nov 2013 12:06:45 -0400
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Hello,
 i'm trying to understand why i'm not getting action="remove" and how to
make it work.

Here are the details:
 SD card is been plugged into the internal SD reader. Rules fire up, create
a subdir per partition and mount the card.- Life is good

SD card is been pulled out of the SD reader - no rules are been executed.
SD is still been mounted.

Here are the rules:
---start copy/paste---
cat /etc/udev/rules.d/50-card.rules

# SD reader
KERNEL=="sd[a-z][0-9]",SUBSYSTEM=="block",BUS=="scsi",SYSFS{rev}=="1.00",SYSFS{model}=="USB
SD Reader   ",SYSFS{vendor}=="Generic
",NAME{all_partitions}="%k",SYMLINK+="cardreader/SD%n"
ACTION=="add",KERNEL=="sd[a-z][0-9]",SUBSYSTEM=="block",BUS=="scsi",SYSFS{rev}=="1.00",SYSFS{model}=="USB
SD Reader   ",SYSFS{vendor}=="Generic
",NAME{all_partitions}="%k",RUN+="/bin/mkdir
/media/SD/sd%n",RUN+="/bin/mount -t auto -o users,rw /dev/cardreader/SD%n
/media/SD/sd%n"
ACTION=="remove",KERNEL=="sd[a-z][0-9]",SUBSYSTEM=="block",BUS=="scsi",SYSFS{rev}=="1.00",SYSFS{model}=="USB
SD Reader   ",SYSFS{vendor}=="Generic
",NAME{all_partitions}="%k",RUN+="/bin/umount
/dev/cardreader/SD%n",RUN+="/bin/rmdir /media/SD/sd%n"

--- end of copy/paste----

after fresh reboot :
<---start copy/paste-->
udevadm monitor --udev
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

<--- plugging the SD in --->
UDEV  [1383321790.616432] change
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0/block/sdc
(block)
UDEV  [1383321792.625084] add      /module/fat (module)
UDEV  [1383321792.638649] add      /module/vfat (module)
UDEV  [1383321792.886526] add
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0/block/sdc/sdc1
(block)
UDEV  [1383321792.887997] change
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0
(scsi)
UDEV  [1383321794.141120] change
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0/block/sdc
(block)

<---pulling it out --->
UDEV  [1383321807.046784] change
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0
(scsi)
UDEV  [1383321807.311459] change
/devices/pci0000:00/0000:00:02.0/usb2/2-6/2-6:1.0/host6/target6:0:0/6:0:0:0/block/sdc
(block)

<---end copy/paste-->

it is my understanding that there is no "remove" event occurs? But that'
doesn't sound right.
Please advise.

Thank you
AZ

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