PR standards/44921: Add errno consts for robust mutexes

Add the two missing errno.h constants: EOWNERDEAD and ENOTRECOVERABLE.
While technically they're used for robust mutexes which we do not
support at the moment, they are listed in POSIX and used by libc++.
While libc++ can be made to build without it, it just locally redefines
the values then, so we may as well define them globally.

Sync errno messages between catalog and errno.h

Expose the pseudo-errors if _KMEMUSER is defined (as well as _KERNEL).
CVS :----------------------------------------------------------------------

branches: 1.39.88; 1.39.98;
Changed error message of ENOPROTOOPT to "Protocol option not available".

branches: 1.38.14; 1.38.16;
PR/32879: arnaud degroote: NetBSD doesn't define the EPROTO errno
While there add EMULTIHOP and ENOLINK.

branches: 1.37.2; 1.37.4; 1.37.6;
merge ktrace-lwp.

branches: 1.36.10;
Add ENOATTR ("Attribute not found"). From FreeBSD.

Cloning cleanup:
1. make fileops const
2. add 2 new negative errno's to `officially' support the cloning hack:
- EDUPFD (used to overload ENODEV)
- EMOVEFD (used to overload ENXIO)
3. Created an fdclone() function to encapsulate the operations needed for
EMOVEFD, and made all cloners use it.
4. Centralize the local noop/badop fileops functions to:
fnullop_fcntl, fnullop_poll, fnullop_kqfilter, fbadop_stat

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

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

Following kleink's lead over in <sys/signal.h> (he's braver than me), remove
all feature-test macros. All of our E* macros are permitted to be defined
by both POSIX and ANSI C, and life is a lot less confusing this way.

branches: 1.32.2;
Add ETIME, per POSIX-2001.

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.

Change the strerror() string for ERANGE consistently to "Result too
large or too small" and reword its intro(2) description to reflect
the present use for non-numerical out-of-range errors; resolves
Andrew Brown's PR standards/21004, the discussion of which was
dramatically sped up by repeated whipping from Perry Metzger. :-)

Oops, ENOSR: resource -> resources here, too.

Add the missing errno symbols that are defined in IEEE Std 1003.1-2001.
The language message files need updating.

Change reviewed and OK'd by Klaus Klein.

Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

branches: 1.26.2; 1.26.4;
Remove ENOTSUP for the moment. This needs a unique number, as noted by
kleink, and there are a few more from SUSv2 that we should have for
completeness anyway--these will be added in the near future.

Add _XOPEN_SOURCE protections. The need for these is questionable, advised
by kleink about the E* predefined namespace; we'll look into that.

Also add ENOTSUP from SUSv2 as an alias for EOPNOTSUPP. It's used by the
SUSv2 pthreads interface, has the same meaning, and pthreads does not use
EOPNOTSUPP.

Add a descriptive comment to previous.

Add an EILSEQ code (C99, first appeared in C90/AMD1), and update message
catalogs where possible.

branches: 1.22.8;
Introduce EOVERFLOW.

Separate the userland and libsa errno declarations from <sys/errno.h> into
their canonical places.

Change the type of sys_errlist from const char *const [] to const char *const *
and rename it to __sys_errlist14. This will prevent the size of the exported
symbol from changing when more errors are added to the list.

Recognize two additional feature test macros for a reentrant errno declaration.

Add ENOMSG.

add EIDRM for SysV IPC

Use __const rather than const for sys_errlist, so it DTRT with -traditional.
Also, make sys_nerr __const. Partly from Todd Vierling in PR 4151.

branches: 1.15.2;
Correct prototype for __errno().

include <sys/cdefs.h> for K&R C and C++ friendliness; PR lib/2836

add multiple inclusion protection

If _REENTRANT is defined, define errno as a macro that calls the
__errno() function.

don't declare sys_errlist or sys_nerr if _XOPEN_SOURCE is defined

Add declarations for sys_nerr & sys_errlist (moved from stdio.h)

KERNEL -> _KERNEL

New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

Add RCS ids.

new errno.h

EOPNOTSUPP == Operation not supported

add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

branches: 1.1.1;
Initial revision