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how to configure hotplugging ?
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javeree
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Joined: 29 Jan 2006
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PostPosted: Thu Dec 06, 2012 2:42 pm    Post subject: how to configure hotplugging ? Reply with quote

in gentoo it is possible to allow services to be hotplugged on detection of certain usb equipments.

E.g. if I set in /etc/rc.conf
rc_hotplug="net.eth1", the service net.eth1 will automatically be started when eth1 is detected by udev.

However, I cannot find the location where I can configure this behaviour.

What I want to do: I have a usb based wifi stick, and I can start the hostapd service to get an access point.

However, when someone pulls and replugs the usb wifi stick, I need the service hostapd to be restarted, not the service net.eth0.

I would expect that there is somewhere some config file that creates a link between a specific device+type and a specific service

I guess that there is some default that says

<network device> named <ethx> ==> service net.ethx

I would like to change that to
<network device> named 'usbwifi' ==> hostapd

Is there any such config file ?
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javeree
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PostPosted: Mon Dec 10, 2012 12:39 pm    Post subject: Reply with quote

I found out more about this mapping. It turns out that all mappings are hardcoded in udev. more specifically,
each time a network interafce is added or removed, the rules in /lib/udev/rules.d/90-network.rules are called.
This calls a script net.sh, which starts or stops /etc/init.d/net.$iface

=> I will have to write my own udev rule to make a map
SUBSYSTEM="net",%k="usbwifi" RUN+=start-or-stop-hostapd
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