standards/107561: Missing SUS function tcgetsid()

[Garrett Wollman]

<<On Sun, 7 Jan 2007 21:04:18 +0100 (CET), Oliver Fromme <olli at lurza.secnetix.de> said:

> In fact, tcgetsid() is part of IEEE Std 1003.1-2001 a.k.a.
> POSIX-2001, which is equivalent to SUSv3.

That is not entirely true.  IEEE Std.1003.1-2001 describes a set of
base interfaces and several sets of layered options which complement
the base interfaces.  SUSv3 uses the same document, but some of the
interfaces which are optional in 1003.1-2001 are mandatory in SUSv3.
Most significantly, this includes the XSI option, which standardizes
old System V (and X/Open) mistakes.

-GAWollman