piping input to executable reading from /dev/tty?

[Dan B.]

Eric Blake wrote:
> On 06/20/2012 10:33 AM, Dan B. wrote:
>> Is there any way to redirect /dev/tty similarly to how stdin can be
>> redirected (e.g., like "echo ... | someexecutable")?
> 
> Yes; use 'expect'.
> 
>> Does Cygwin (or Unix/Linux, for that matter) have any equivalent way
>> of redirecting /dev/tty?
>>
>> Can /dev/tty be redirected at all?  (I would guess that something
>> could be done with pseudoterminals, but I know very little about
>> them.)
> 
> Yes, 'expect' is the command line tool that lets you script around
> programs that expect to be run interactively, but where you want to
> script the input that your program will see.

Does expect use only redirection of file descriptors, or can it also
redirect references to /dev/tty?

Daniel





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