Play a message before fax transmiting

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Gert Doering <gert@greenie.muc.de> wrote:
> Marc (and Marc), where is the modem connected to in a "vm shell"? 

If you are talking about a voice shell script launched from vgetty,
the modem is still controlled by vgetty, the shell just talks to
vgetty through pipes, sending commands such as PLAY, RECORD, etc.

> stdin/stdout?  If yes, one could attack this by running "sendfax -S" 
> (modem on stdin), and sending something like "VOICE STOP" to vm 
> beforehand, which would mean "do not listen on the modem file descriptor 
> anymore at all".

The other possibility is when vm executes a shell script: I never did
that. However what about adding a new command SEND_FAX or
EXECUTE_PROGRAM which would cause vgetty to fork + waitpid on a
sendfax process ?