[ECOS] select () confusion

[Trenton D. Adams]

  > 
  > Yes. Normally you track the largest fd you've ever had, or keep a
list
  > of
  > fds. Or just use FD_SETSIZE if you're lazy IIRC.
  > 

IIRC?

  > > Anyhow, I thought that the first parameter was the number of file
  > > descriptors in the fd_set.  It makes no sense to have to calculate
  > what
  > > the highest numbered socket descriptor is before calling select
().
  > 
  > It's standard BSD select() use.
  > 

Not *_ALL_* standards are a good idea! ;)

I personally like the windows, BSD *compatible*, select better.  The
first parameter is there only for compatibility.  Since FD_SET always
increments the fd count anyhow, I don't see a point in even using the
first parameter.

  > > On
  > > top of that, the example at the bottom of the documentation for
select
  > > () is not very good.  It passes a 1 in as the first parameter
which is
  > > exactly why I thought it was the number of file descriptors and
not
  > the
  > > highest numbered one.
  > 
  > Ah, that's because it happens to choose stdin, which is always fd 0.
  > 

Oh, I see.