Re: vfork specs

Stanislav Meduna (stano@trillian.eunet.sk)
Sat, 16 Jan 1999 10:21:06 +0100 (CET)

> Assume this:
>
> void
> bar ()
> {
> pid_t p = baz ();
> if (p == 0)
> foo (0);
> }
> pid_t
> baz ()
> {
> return vfork ();
> }

The Single Unix Specification says:

: The vfork() function has the same effect as fork(),
: except that the behaviour is undefined if the process
: created by vfork() either modifies any data other than
: a variable of type pid_t used to store the return value
: from vfork(), or returns from the function in which
: vfork() was called, or calls any other function before
: successfully calling _exit() or one of the exec family
: of functions.

So this one is (if I interpret it correctly)
definitly bad code.

Regards

-- 
				Stano




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