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How can I use socketpair (C++ Linux) to have two way communication between (two) applications? Both applications will run on same hardware, hence I am looking for implementation of socketpair on same platform.

I have a simple test program which "connects two sockets" and passes the data between them.

How do I make them aware that each socket is in DIFFERENT application?

I have some success doing same task using bluetooth (apps run on different hardware), now I would like to apply similar approach on same hardware.

Suggestions are appreciated.

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    Your question is not clear. Include what you have tried, and what went, wrong. – ctrl-alt-delor Mar 13 '20 at 21:29
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If you use this call. Then you will have a few choices (there may be others):

  • Call fork, so that you have two processes with the sockets. Then you can have one end used by the parent, and one by the child.
  • Alternatively use a named socket. Then one end is owed by the creator, and the other is attached to a file-name.
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  • Thanks for reply. – anne Mar 15 '20 at 19:29
  • Thanks for reply. I am currently running the primary application (client) communication to the secondary (server). In server I used socketpair and fork. The child is managing the client / server Bluetooth connection and the parent does the graphics (OpenGL). Works in principle, still haveing some timing issues. – anne Mar 15 '20 at 19:35

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