Henrique de Moraes Holschuh wrote on 17/08/2005 15:22: >> On Wed, 17 Aug 2005, Troy Heber wrote: >> > >>>>It's actually more complicated than that. How do you test for "up and >>>>running"? ifup returns when the interface is "up" but has no way to see when > >> >> You test for the functionality you need. In this case, ip link until it has >> proper IPs assigned, or add a hook to DHCP directly that sets up semasphores >> (we will need help from the DHCP packages for this one).
Network link status as a dependency is a problem in many ways. Most importantly because the link could go back down any second, no matter wether it is ethernet or plip/slip/ppp or something completely different. Also not all configured links might need to be up to fulfill the "networking" dependency (for example if you don't need the computers LAN connection to be available, but only its internet connection)..... Anyway: Setting a semaphore from "within" the DHCP client is easy for dhcp-client/dhcp3-client since they provide a script which is called to do the real setup and as far as I recall also provide hook directories (runparts type) to hook into the setup process. >>>>This is only one example. I think that any new initscript design should try >>>>to improve the dependency situation, including allowing users to define their >>>>own conditional dependencies. I.E. networking is not functional/running until we can >>>>ping the router, etc. > >> >> That is something it ALREADY does (err... will do :P ). What it does not, >> and should not ever bother with at the initscript subsystem level is how to >> implement such tests. This belongs in the initscript level itself... IMHO: Any service which provides an init-script (or equivalent) also should provide an implementation of these tests, preferably in a form easily adjustable to local needs by the local admin. cu, sven
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