I am not using fork().If thats the case then the exec() you are linking is not behaving as a POSIX exec() call, because if it did you would not still have two processes to even compete for the I/O streams. The first process image would be "replaced" by the second.
just plain exec().
% man execl
8< ---------
"The exec family of functions replaces the current process image with a new process
image."
-------------
So, either you are not using Cygwin execl(), or it is VERY broken, which I doubt because too many applications have been working correctly for too long for the second to be the case.
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