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From: "crrodriguez at opensuse dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/28730] Extend posix_spawnattr_* interface with more useful
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Date: Sun, 09 Jan 2022 14:07:56 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28730

--- Comment #5 from Cristian Rodr=C3=ADguez <crrodriguez at opensuse dot or=
g> ---
(In reply to Adhemerval Zanella from comment #4)
> (In reply to Cristian Rodr=C3=ADguez from comment #3)
> > do you know by any chance why it was decided to make posix_spawnattr_t =
and
> > posix_spawn_file_actions_t transparent ? posix says otherwise..
> >=20
> > "for extensibility and consistency with the newer POSIX interfaces, the
> > attributes interface has been changed to an opaque data type. This inte=
rface
> > now consists of the type posix_spawnattr_t.."=20=20
> >=20
> > MacOS and opebsd at least do it this way..
>=20
> POSIX states posix_spawnattr_t and posix_spawn_file_actions_t must be act=
ual
> types, it does not imposes any restriction to on how it is actually
> implemented. The example provided does use a struct with some internal
> fields [1].
>=20


So the best way way would be to use the pad space to introduce a an internal
opaque struct  which we can modify or extend at will ? even with all
implementation-defined leisure we still shouldn't break the ABI..

--=20
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