Date: Thu, 24 Apr 2014 08:51:08 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Rolf Nielsen <rmg1970swe@gmail.com> Cc: User questions <freebsd-questions@freebsd.org> Subject: Re: Running a command when a specific interface is created or destroyed Message-ID: <alpine.BSF.2.00.1404240849380.4641@wonkity.com> In-Reply-To: <53591F01.4020108@gmail.com> References: <53591F01.4020108@gmail.com>
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On Thu, 24 Apr 2014, Rolf Nielsen wrote: > Hi, > > I use my phone's 3G/4G connection to connect my computer to the > internet. With the help of the urndis driver, it comes up as ue0. > However, if I reboot the computer, the phone automatically disables USB > tethering, and I can't re-enable it until the boot is complete. > > Being somewhat paranoid, I use an OpenVPN service, and I want the cilent > to start automatically. I obviously can't set it to start from rc.conf, > as I can't log in to the server before I have an internet connection. > > So, is there a way to start the OpenVPN client automatically upon > creation of the ue0 interface? E.g. can dhclient be set up to run the > openvpn start script after it has given ue0 an IP address? And is there > a way to automatically stop the openvpn client if ue0 is destroyed, e.g. > if I disconnect my phone from the computer? devd(8) can do that. Look at /etc/devd.conf for some examples, and devd.conf(5) for more detail.
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