On 9/4/21 1:29 AM, Pavel Machek wrote:
+What: /sys/class/leds/<led>/add_blkdev
+Date: September 2021
+Contact: Ian Pilcher <arequipeno@xxxxxxxxx>
+Description:
+ Associate a block device with this LED by writing its kernel
+ name (as shown in /sys/block) to this attribute. Multiple
+ device names may be written at once, separated by whitespace.
This is seriously strange interface.
It's the netdev-like interface that Marek described in an earlier note
(adapted for the fact that the trigger supports many-to-many
relationships).
If you have directory with symlinks, why not use symlink() syscall
instead of add_blkdev, and unlink() syscall instead of delete_blkdev?
I'd actually had that thought as well, but I didn't see any obvious way
to do that in sysfs when I looked. If you know how to do it or know of
an example, please let me know.
If using symlink()/unlink() isn't an option, do you have a suggestion
for a less seriously strange interface?
Thanks!
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