watches versus sfds

[Matt Wette]

Hi All,

I am writing a mainloop for Guile based on libdbus and epoll.

I have a procedure for adding watches.  Is there a limit on how many 
watches are assocated
with a specific (unix) fd?   I see from print statements that it is at 
least two.  I am setting up
a datastructure to track fd->watches so want to know if this is just a 
handful (in, out, error, hangup) or an arbitrary number.

Thanks,
Matt