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netns : close all sockets at unshare ? [message #21168] Tue, 02 October 2007 21:45 Go to previous message
Daniel Lezcano is currently offline  Daniel Lezcano
Messages: 417
Registered: June 2006
Senior Member
Hi,

I was looking at some cornercases and trying to figure out what happens 
if someone does:

1 - fd = socket(...)
2 - unshare(CLONE_NEWNET)
3 - bind(fd, ...) / listen(fd, ...)

There is here an interaction between two namespaces.
Trying to catch all these little tricky paths everywhere with the 
network namespace is painful, perhaps we should consider a more radical 
solution.

Shall we close all fd sockets when doing an unshare ? like a 
close-on-exec behavior ?







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