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When is 'ifup' really done?

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Old 05-03-2008
When is 'ifup' really done?
I have been looking in the scripts for interface management, in an effort to kick off a script of my own on any "significant network event" (I will qualify that in a bit)

I managed to add a check to tell netplugd to run my script every time there is a hot-plug event. Now I need to make it so my script is also kicked off on a 'service network restart' or simply an 'ifup ethX'... which seemed doable to me...

Looking in the ifup script, I saw the ifup-eth script get kicked off, from there, the ifup-post script, to the ifup-local script (which doesn't exist, so isn't run)... stupid me, I made the assumption that "post" meant "after", and instead of seeing my script run, I see messages like "arping: recvfrom: Network is down" (arping is being called from my script)

btw - the first exec of my script happens *after* the interfaces are raised, but only because I do it via the boot-order rc3.d script-list

Any idea how I can make my script *actually* kick off after the interface is *actually* up?
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LEARN ABOUT DEBIAN

essidscan

ESSIDSCAN(8)							     Commands							      ESSIDSCAN(8)

NAME

       essidscan - scan for ESSID corresponding to available WLAN access points

SYNOPSIS

       In /etc/network/interfaces:

       mapping <interface> script essidscan

DESCRIPTION

       The essidscan utility is used to tell the ifup and ifdown utilities about the current SSID of the WLAN currently being accessed.  It can be
       used to map the SSID name to an iface stanza.

CONFIGURATION

       A sample /etc/network/interfaces may look like this:

	  mapping hotplug
	    script /etc/network/essidscan
	    map SSIDONE  wlan-work
	    map SSIDTWO  wlan-work
	    map HOME

	  iface wlan-work inet dhcp
	    wireless-key     1234-5678-9ABC-DEF0-1234-5678-9A
	    wireless-keymode restricted

	  iface HOME inet static
	    address	     192.168.2.4
	    netmask	     255.255.255.0
	    gateway	     192.168.2.1
	    wireless-essid   HOME
	    wireless-key     s:somepassword
	    wireless-keymode open

	  iface DEFAULT inet dhcp

FILES

       /etc/network/interfaces
	      the interfaces definition file

       /etc/network/run/ifstate
	      a record of the current state of the interfaces, managed by ifup and ifdown

SEE ALSO

       interfaces(5) ifscheme(8) ifup(8) ifdown(8)

AUTHORS

       Tor Slettnes <tor@slett.net>

																      ESSIDSCAN(8)