How to force keystrokes into the buffer on Unix

I know there is a way to do this - that is, a system call that allows
you to push a character into the keyboard buffer - but I can't seem to
find it now (checked man pages for tty, termio(s) on several systems).

I found a workaround, with expect, like this:

expect -c 'spawn program;expect something;send key;interact'

but I'd prefer to avoid that as it brings in the overhead of expect and
a tty layer just to push one key. Anyway, I think I did this a long
time ago and that it is TIOsomething. Can anyone help?

.

Relevant Pages

  • Re: How to force keystrokes into the buffer on Unix
    ... you to push a character into the keyboard buffer - but I can't seem to ... a tty layer just to push one key. ...
    (comp.unix.programmer)
  • Re: How to force keystrokes into the buffer on Unix
    ... you to push a character into the keyboard buffer - but I can't seem to ... a tty layer just to push one key. ... I don't think you can avoid the overhead of a tty layer. ... Assume I have an app that is reading and writing the keyboard, ...
    (comp.unix.programmer)
  • Re: How to force keystrokes into the buffer on Unix
    ... find it now (checked man pages for tty, ... a tty layer just to push one key. ... I don't think you can avoid the overhead of a tty layer. ... there would be nothing to push the character into. ...
    (comp.unix.programmer)
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  • Re: How to force keystrokes into the buffer on Unix
    ... gazelle@xxxxxxxxxxxxxxxxxxxxx (Kenny McCormack) wrote: ... Barry Margolin wrote: ... a tty layer just to push one key. ... received the character pointed to by cp. ...
    (comp.unix.programmer)