[Buildroot] Run a custom script after USB mount

[Arnout Vandecappelle <arnout@mind.be>]

On 04/24/15 01:04, Santhosh Ramani wrote:
> Hello Arnout,
> 
>     > /# cat /etc/udev/rules.d/99-usb-detection.rules/*
>     > SUBSYSTEM=="usb", ACTION=="add", KERNEL=="sda*", RUN+="/etc/hcc/usb-detected"*
>      If it's a scsi device, the subsystem is block, not usb, right?
> 
> 
> Yes you are correct - I removed the subsystem section and it now works properly.
> I also was not restarting (or reloading) udev rules properly and that was also
> contributing to the problem. 
> 
> The script I want to run copies data from the USB stick and places it at a given
> location. However, it seems that by the time the script finishes executing the
> USB is not yet mounted so nothing gets copied. How can I defer execution of the
> script until the volume is mounted, yet at the same time not block udev. I tried
> the following:
> 
> usb-detected: Launcher Script
> 
> /etc/hcc/update_script & exit
> 
> I was hoping the second script "update" would be launched as a separate process
> and will be non-blocking. I could then add sleep command in the second script
> and delay execution. However, this doesn't seem to work. I was not able to use
> 'disown' either, since it's a bash command. Similarly I didn't have any luck
> with 'at' command either.
> 
> Any thoughts on how I can defer the thread and not block udev?

 Actually I don't use udev myself - I just read the documentation to answer your
question. so I really can't say.

 However, can't you add something to whatever script is doing the mounting, so
you can be sure that it's mounted already?

 Regards,
 Arnout

> 
> Thank you once again for all your replies.
> Regards
> 
> Santhosh


-- 
Arnout Vandecappelle                          arnout at mind be
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