system calls

[Tomas By]

Hi all,

In a Guile program I am using (system <string>) to start a C binary 
which I then communicate with over the network.

I'm wondering if there is any way to get the process id of this binary?

Have tried to call "ps -A|grep <name>" using with-output-to-string and 
with-error-to-string, but am not getting the system call output. Also, 
this is a very crude approach.

Cannot find anything useful in the Guile manual.

Perhaps there are some libaries with a more sophisticated system call 
API?

Grateful for any suggestions.

/Tomas