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Re: pipe buffering

From: Neil Jerram
Subject: Re: pipe buffering
Date: Wed, 22 Sep 2010 21:17:08 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Aidan Gauland <address@hidden> writes:

> Then I have a sexp for debugging, which shows that `expect' is getting
> one character at a time from the telnet subprocess, since it only
> prints out "Tmatch", instead of "Trying [IP address]..."

Well, as the manual says:

 -- Macro: expect clause ...
     [...]   The procedures
     are called in turn after each character is read from the port,

     The test is successful if the procedure returns a non-false value.

Your lambda returns *unspecified*, which counts as a non-false value.
So the whole (expect ...) invocation completes after reading just one


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