On Thu, Dec 23, 2004 at 11:59:59PM -0500, Pierre A. Humblet wrote: >At 11:35 PM 12/23/2004 -0500, Christopher Faylor wrote: >>I don't think you need it. You just need to tell a process which is >>about to exec after having been execed to make sure that its >>wr_proc_pipe is valid. > >Yes, that's the key. So the question is only about method. Either the parent >guarantees that the child has a valid handle, or the child must check >that it already has a valid handle or wait until it does.
I have just implemented code which causes an execed child to wait for the parent to fill in its wr_proc_pipe if it is going to exec again. It uses a busy loop but I think it's unlikely that the loop will be exercised too often. I'm testing it now. cgf
