fix various typos in comments, documentation and messages.
mainly s/paramater/parameter/ and s/reduntant/redundant/.

fix various typos in comments and log messages.

Try to appease KUBSan in sys/sys/wait.h in W_EXITCODE()

Cast return value that is stored as int to unsigned int in order to
appease the << 8 operation. In case of a ret=-1, this cast is papering
thi

Try to appease KUBSan in sys/sys/wait.h in W_EXITCODE()

Cast return value that is stored as int to unsigned int in order to
appease the << 8 operation. In case of a ret=-1, this cast is papering
things over or replacing UB with an implementation specific behavior.

There is a reverse operation with the same papering things over:
WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)

No functional change intended.

Detected with Kernel Undefined Behavior Sanitizer.

Reported by <Harry Pantazis>

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- Move WUNTRACED outside the _NETBSD_SOURCE ifdef because waitpid()
needs it (kre)
- Reformat the comments

Reflect current reality about the wait options and standards.

GC WOPTSCHECKED, define macros for the select opts and all the valid opts.
The linux compat flags are not part of X/Open.

Since the stopped bits set is a subset of the continued bits set, check
that we are not continued in WIFSTOPPED.
Make WIFSIGNALED more obvious, it being the remaining state of not exited,
not stopped

Since the stopped bits set is a subset of the continued bits set, check
that we are not continued in WIFSTOPPED.
Make WIFSIGNALED more obvious, it being the remaining state of not exited,
not stopped and not continued.

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KNF. Remove extra spaces. No functional change.

Implement WIFCONTINUED using the linux value instead of the FreeBSD one...

need more includes for siginfo...

Add wait6() to be used to implement waitid, mostly from FreeBSD.
Create idtypes.h shared by wait.h and pset.h

correct the definition of WSTOPPED

merge christos-time_t

Split sys_wait4() so that compat code can fiddle with the returned 'status'
and 'rusage' without having to copy data to/from stackgap buffers.
The old split (find_stopped_child) could be removed.
amd

Split sys_wait4() so that compat code can fiddle with the returned 'status'
and 'rusage' without having to copy data to/from stackgap buffers.
The old split (find_stopped_child) could be removed.
amd64 seems to run netbsd32, linux and linux32 emulations. sparc64 compiles.

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merge ktrace-lwp.

nuke trailing whitespace

de-__P

correctly define _W_INT ifdef _KERNEL
- kernels where sizeof(u_short) != sizeof(int) were broken otherwise

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.

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.

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Defines for modified kern_exit.c

Add `WALLSIG' which causes wait4(2) to wait for all processes, regardless
of exit signal. Add Linux-compatible aliases __WCLONE (for WALTSIG) and
__WALL (for WALLSIG), for compatibility with the Lin

Add `WALLSIG' which causes wait4(2) to wait for all processes, regardless
of exit signal. Add Linux-compatible aliases __WCLONE (for WALTSIG) and
__WALL (for WALLSIG), for compatibility with the Linux clone(2) API.

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Fix various misspellings of compatible/compatibility.

Allow an alternate exit signal (i.e. not SIGCHLD) to be delivered to the
parent, specified at fork time. Specify a new flag to wait4(2), WALTSIG,
to wait for processes which use an alternate exit si

Allow an alternate exit signal (i.e. not SIGCHLD) to be delivered to the
parent, specified at fork time. Specify a new flag to wait4(2), WALTSIG,
to wait for processes which use an alternate exit signal.

This is required for clone(2).

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& 0xff WSTOPSIG and WEXITSTATUS, since only 8 bits are significant.