In message <[EMAIL PROTECTED]>, Alexander Langer write
s:
>Thus spake Poul-Henning Kamp ([EMAIL PROTECTED]):
>
>> You guys are overlooking something about DEVFS: devices may appear
>> post-boot.
>
>Ah, yes.
>
>BTW: Devices don't disappear if you unload devices.
>This happens for example with bktr.ko.
That is because the bktr driver fails to call destroy_dev()
when it unloads.
>Hmm. A technical question: How would the devd be notifed about an
>event in the devfs?
There are many ways to do this, a kqueue() or poll() based solution
is probably the correct way, monitoring the sysctl vfs.devfs.generation
is the Q&D way.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED] | TCP/IP since RFC 956
FreeBSD coreteam member | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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