Very Computer

I'm trying to write a dialback program for Solaris (working on v2.6).
With ttymon, it's easy to have it call my program instead of the
default /bin/login.

The one problem I'm encountering is trying to drop the modem
connection.  My program ends after I do this.  I've tried ignoring
all signals (with sigignore()) figuring that I might be getting HUP
(first I tried just ignoring HUP, but that didn't do anything).
Anybody know why my program is terminating when I disconnect the modem
line?  And more importantly, how to prevent it?

Thanks for any information.
--

Disclaimer: Any/All views expressed
here have been proved to be my own.   [http://www.csh.rit.edu/~adam/]

If you can achieve this, you can send a command to make the modem
hold DCD on all the time, hang up the phone line, and dial out
while remaining in command mode.  Then when the modem says a
connection was made, you can re-program the DCD behavior and
tell the modem to go back on-line.

Might be easier to have ttymon invoke a program that sends a signal
to another program that does the calling back.  Then the original
program can be killed off when the modem hangs up without preventing
the callback.

  -Greg
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Quote:>....
>The one problem I'm encountering is trying to drop the modem
>connection.  My program ends after I do this.  I've tried ignoring
>all signals (with sigignore()) figuring that I might be getting HUP
>(first I tried just ignoring HUP, but that didn't do anything).
>Anybody know why my program is terminating when I disconnect the modem
>line?  And more importantly, how to prevent it?

From a security standpoint, it is cleaner to open a separate modem for
outgoing, anyway.

--
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The word of the day is mispergitude

Quote:

> The most obvious way to prevent it is to tell the modem to
> not drop the DCD signal when it disconnects.

--
Andrew Gabriel
Consultant Software Engineer

Quote:> there's a complicated solution, and a simple solution.
> well, there's atleast two solutions :-)
> one way would be to simply fork your program before disconnecting the
> modem.
> Then the child re-opens a modemline.

Adam