[m-dev.] io__call_system()

[Zoltan Somogyi]

> - Is the 8 bits as flags a standard.  ie can i just shift the return val right
>   8 bits to get the actual return value, or will my results depend on the
>   system?

It used to be standard until about the mid-eighties. Since then, some
versions of Unix have done things differently, returning a "union wait"
instead of an int.

> - Do we want to make the behaviour of io__call_system() friendlier?

Yes.

Zoltan.