accessing the output of an external cmd from inside a loadable builtin

[bobg]

Inside my builtin, I want to execute a 'find' command and process the 
results. I have been looking at the execute_cmd.c file. I have been 
using execute_shell_function for other commands but I am not sure how I 
should do it so that I can access the output of the find command in the 
builtin code. There's probably multiple ways to do it.  Can anyone 
suggest a good approach?

--BobG