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Date: Wed, 29 Jan 2020 16:55:30 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: MUSL not including <sys/ttydefaults.h> in <sys/ioctl.h>
* Petr Vorel <pvorel@...e.cz> [2020-01-29 13:50:12 +0100]:
> Hi,
>
> Glibc is including <sys/ttydefaults.h> in <sys/ioctl.h> with following comment:
>
> /* On a Unix system, the system <sys/ioctl.h> probably defines some of
> the symbols we define in <sys/ttydefaults.h> (usually with the same
> values). The code to generate <bits/ioctls.h> has omitted these
> symbols to avoid the conflict, but a Unix program expects <sys/ioctl.h>
> to define them, so we must include <sys/ttydefaults.h> here. */
>
> I guess glibc is (as usual) wrong and therefore users who needs these
> definitions should load also <sys/ttydefaults.h> explicitly.
at some point i did some sys/ioctl.h cleanup
and i don't remember how conciously i omitted
the sys/ttydefaults.h include. (they are both
non-standard headers so in principle including
is ok)
sys/ttydefaults.h is more related to termios.h:
several TTYDEF_* macros depend on termios.h and
termios.h includes it on both glibc and bsd in
non-standard mode i think (termios.h is standard
header). it is weird to include things into
ioctl.h that don't work without termios.h.
i don't think bsd sys/ioctl.h includes it, but
ioctl is very os specific.
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