Descriptor Passing without unix domain sockets or streams ?

Hello Mailing list,

i have a problem passing a file descriptor from one process to another.

I have two processes A and B. Both are running in different network and filesystem namespaces, so it is impossible to use unix domain sockets or net sockets to pass a file descriptor from process A to process B.

The usage of STREAMS is also impossible, as you can see in

	http://fixunix.com/unix/84093-streams-pipes-ioctl-i_sendfd.html

[quotation begin]
Linux doesn't have STREAMS, which are the System V way of doing this task. ...
[quotation end]

Are there additional possibilities for file descriptor passing like using a named pipe or something like that or does anybody know a good workaround for this problem ?

Thank you very much !!
Julian Thomé

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