Can you help me understand why closing one file handle ($out) results in the other file handle ($in) printing output in the while loop?

When you close the $out file handle, the remote process which is reading from the other side gets an EOF and that triggers its 'ok-i-have-the-complete-request-sending-the-response-now' logic.

In theory, sending the end of record marker should be enough to get the response back, but it is not uncommon for network equipment to have broken SSH implementations. In this case, it seems that it has some buffering issue.

Delivering of the EOF in SSH is done using a different set of protocol primitives and those are correctly flushing the buffers (otherwise, it would be a useless SSH implementation).

In reply to Re^12: SSH to remote subsystem (Net::OpenSSH?) by salva
in thread SSH to remote subsystem (Net::OpenSSH?) by sojourner9

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