CVS log for src/sys/sys/sigtypes.h

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Keyword substitution: kv
Default branch: MAIN

sys/sys: remove CONSTCOND comment from do-while-0 loop

Lint doesn't need this comment anymore, as there is nothing surprising
or unusual about this idiom.

Expose sigaltstack, stack_t and friends to Posix Issue 5 (200809L) References:

https://man7.org/linux/man-pages/man2/sigaltstack.2.html
https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigaltstack.html

update from HEAD

Sync with HEAD

Sync with HEAD

make __sigmask unsigned

sync with head

sync to -current.

Remove COMPAT_SA / KERN_SA.  Welcome to 6.99.3!
Approved by core@.

sync with head.

Sync with HEAD.

Sync with HEAD.

Merge wrstuden-revivesa into HEAD.

Per discussion with ad, remove most of the #include <sys/sa.h> lines
as they were including sa.h just for the type(s) needed for syscallargs.h.

Instead, create a new file, sys/satypes.h, which contains just the
types needed for syscallargs.h. Yes, there's only one now, but that
may change and it's probably more likely to change if it'd be difficult
to handle. :-)

Per discussion with matt at n dot o, add an include of satypes.h to
sigtypes.h. Upcall handlers are kinda signal handlers, and signalling
is the header file that's already included for syscallargs.h that
closest matches SA.

This shaves about 3000 lines off of the diff of the branch relative
to the base. That also represents about 18% of the total before this
checkin.

I think this reduction is very good thing.

sync with head.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

compat code reorg.

sync with -current

sync with head.  xen and whitespace.  xen part is not finished.

Sync with HEAD.

Hi Perry!

nuke trailing whitespace

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Define a few 32bit compat types (if COMPAT_NETBSD32, not exported to
userspace). Having them here is both good and bad. Good because they're
close to the actual native ones, bad because it exposes things out
of compat/netbsd32. However, putting the exclusively in the latter
requires a lot of reshuffling in the includes there, so this will
do for now.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

Add a new feature-test macro, _NETBSD_SOURCE.  If this is defined
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.

This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
  can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
  various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
  !defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.

I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them.  In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.

Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.

Merge the nathanw_sa branch.

Split out the type defitions of sigset_t and stack_t into a new
file <sys/sigtypes.h>, and include it from <sys/signal.h>.  This
allows other header files which need the signal-related defined
types, but for which including <sys/signal.h> is too much.

file sigtypes.h was initially added on branch nathanw_sa.