Where does the "prompt come from"

[Niclas Bäckman C (LI/EAB)]

Hi All !
I have a little question about the shell that is run when establishing a
connection towards an SSH server.
The client(OpenSSH) displays a prompt(as usual) when a command is executed,
but my question is, where does the prompt come from.
Is it sent by the remote shell or is it handled in the client ??

The reason I ask is that we have developed a product that redirects
stdin/stdout/stderr from the ssh binary to a socket, and we then
perform socket read/writes directly into the ssh tunnel. But when i perform
a command, the prompt is never read up from the server.
So it's difficult to know when a remote script is finished. Using the same
solution but towards a telnet server always results in a prompt
back to the client.

I would be most greatful for any good ideas/hints in this case.

Thanks in advance !!

e
Niclas Bäckman 
Software Design | OMSec - team SSH
Ericsson AB
Center for Radio Network Control
Box 1248
581 12 Linköping
Sweden
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