Corey Huinker <corey.huin...@gmail.com> writes:
> 128+N is implemented.

I think this mostly looks OK, but:

* I still say there is no basis whatever for believing that the result
of ferror() is an exit code, errno code, or anything else with
significance beyond zero-or-not.  Feeding it to wait_result_to_exit_code
as you've done here is not going to do anything but mislead people in
a platform-dependent way.  Probably should set exit_code to -1 if
ferror reports trouble.

* Why do you have wait_result_to_exit_code defaulting to return 0
if it doesn't recognize the code as either WIFEXITED or WIFSIGNALED?
That seems pretty misleading; again -1 would be a better idea.

                        regards, tom lane


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