| > Most of the time this works as expected.  However, if a child process is 
| > blocked on a select() call at the time the parent calls waitpid(), then 
| > waitpid() does not return despite the WNOHANG option.

  I tried a minimal test program, and it worked as expected (ie. not
blocking). Is there something special about the not-"most of the time"
times when it blocks?

	mjl