cannot run vm shell script from a daemon

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Hi,

Thanks a lot to the authors of vgetty... lots of interesting things are
possible if I could understand why I can't get it to run from within my
web server. 

I can run a vm shell program from the command line but when I try to run 
it from inside a daemon it doesn't work (I'm using one of the standard 
scripts obtained from the distribution).

I'm running the vm shell script from within AOLServer which is a 
multi-threaded web server that has a facility for scheduling jobs. I've 
turned error checking up to the max, but all I see in /var/log/vm.log is:

06/24 23:45:42  vm: Executing shell script /home/web/server1/www/ringading/message.sh with shell /bin/sh
06/24 23:45:42    vm: opening pipes
06/24 23:45:42    vm: forking shell
06/24 23:45:42   vm(0): HELLO SHELL
06/24 23:46:42  vm: Watchdog timer expired, exiting...
--

The lock file is left behind in /var/lock. I've been trying this for several 
hours and the weird thing is it has occasionally worked but I can't work 
out what I've done to make it work. I seem to be able to get it to run 
within an at job launched from a web server process but not directly from 
the web server process itself.

I'm running RedHat Linux 5.2 with 2.0.35 kernel, glibc 2.1.1 with a US 
Robotics 56K modem. I installed the mgetty-voice-1.1.14 rpm (with 1.1.14 
version of mgetty).

Any pointers on how to get this to work would be much appreciated. 

John

PS. I also can't work out how to use vm shell to send an AT string to the 
modem to tell it to ignore my stuttering dial tone to dial out when I 
have a voicemail on the line. For some odd reason I can't see that 
documented anywhere and if anyone can point me to the right place that 
would be great.