automate an interactive process

automate an interactive process

[kaushal]

Hello  all,
	Iam trying to automate the login program.That is I want "my process" to
spawn login process and then provide it with the username and password
without my interaction.

I know that I can use the "expect" program for it which is based on TCL.
But I want to do this from within a C program.

  Thanks in advance.
Regards-
Kaushal

Re: automate an interactive process

[Glynn Clements]

kaushal wrote:

> 	Iam trying to automate the login program.That is I want "my process" to
> spawn login process and then provide it with the username and password
> without my interaction.
> 
> I know that I can use the "expect" program for it which is based on TCL.
> But I want to do this from within a C program.

Then you need to re-create the guts of "expect" in C.

Essentially, you need to obtain a pty, create a child process in a new
session, redirect stdin/stdout/stderr from the pty slave, then have it
execute /bin/login. The parent process reads the prompts from the pty
master and writes the appropriate input to it.

-- 
Glynn Clements <glynn.clements@virgin.net>