On 07/12/2018 09:39, Rafał Miłecki wrote:
On 2018-12-07 04:41, Yousong Zhou wrote:
On Thu, 6 Dec 2018 at 20:42, Rafał Miłecki <[email protected]> wrote:

From: Rafał Miłecki <[email protected]>

This new function imlements common code needed to run /etc/hotplug.d/
listeners. It allows specifying subsystem and environment strings as
commonly used in the hotplug.d.

hotplug-call is currently a OpenWrt-specific shell script from
base-files.  A library function's dependence on exact name and path of
non-standard executable does not seem fit.

You're probably right, I guess the best solution would be to implement
hotplug-call script behavior directly in the libubox library.


Hotplug events from the kernel is already being handled by
hotplug.json script.  Events from non-standard subsystem like "iface"
as defined by netifd are generated and handled fine just by itself
[1].  As such, I cannot find enough other places needing this function
to make it into libubox.

We could make netifd use that hotplug_call() helper, but now I noticed
that netifd simply uses setenv() after the fork(). That may be simpler
than building all that envp array.


I'm not sure now if it's better to work on:
1) Improved (native) hotplug_call() implementation in the libubox
2) Original idea of doing fork() in the fstools / block + setenv()

Implementing hotplug_call() was originally suggested by John, let's see
what's his opinion too.


I was simply thinking of making the code reusable. i do understand the concens. I dont really hold a really strong position on this. if you feel that it is better to implment this inside blockd directly or any other way, feel free to do so.

    John



 [1]
https://git.openwrt.org/?p=project/netifd.git;a=blob;f=interface-event.c;h=a40f6dc883d3a3654d73d0592cd7eb65c2a8de85;hb=HEAD#l45

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