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Date: Fri, 11 Aug 2006 14:16:41 -0600 (MDT)
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To: jchoque@tlmat.unican.es
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Attach/detach devices
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In message: <00bb01c6bd6f$77c8ddb0$2bba90c1@Altair>
            "Johnny Choque" <jchoque@tlmat.unican.es> writes:
: Hi,
: 
: I'm trying to do a userland program that detect the event when a device is
: attached/detached. In particular, I would like to detect these events for
: wireless pc card insertion/ejection or when tear down the connection of the
: wireless interface build-in laptop. I've found that functions
: device_attach/device_detach are used by the kernel when a device is
: attached/detached respectively, and, e.g, when a device is detached "a
: notification event is sent to userland for user-based device management
: service", how can I use that notification event in my userland program?
: Could you give me some ideas to do my program?

man 8 devd

Warner