Align sysconf numbers.

Add _SC_AVPHYS_PAGES.
getconf(1) add this and SC_PHYS_PAGES.
libc: Use vm.uvmexp2 over vm.meter is it's twice as fast on my setup.
getconf.3: Tidy up wording for SC_PHYS_PAGES.

Add ACL support for FFS. From FreeBSD.

Provide sysconf(_SC_RTSIG_MAX) = SIGRTMAX - SIGRTMIN

Thanks nros@ for the correct definition

branches: 1.61.16;
Realtime signal support from GSoC 2016, Charles Cui.

According to Opengroup online specifications[1], _POSIX_CPUTIME and
_POSIX_THREAD_CPUTIME options should be present in unistd.h not
limits.h. Move them with other options.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html

branches: 1.59.2;
GSoC 2016 Charles Cui: Implement thread priority protection based on work
by Andy Doran. Also document the get/set pshared thread calls as not
implemented, and add a skeleton implementation that is disabled.
XXX: document _sched_protect(2).

GSoC 2016: Charles Cui: Add timer related macros
_POSIX_CPUTIME
_POSIX_THREAD_CPUTIME
_POSIX_DELAYTIMER_MAX

GSoC 2016: Charles Cui: add SEM_NSEMS_MAX

_SC_TIMERS_MAX

branches: 1.55.6;
Add shm_open(3) and shm_unlink(3) to support POSIX shared memory objects.
They are implemented using tmpfs (mounted at /var/shm).

Discussed on tech-{kern,userlevel} (quite a while ago).

branches: 1.54.2;
add _SC_PHYS_PAGES

branches: 1.53.2;
Define _POSIX_SPAWN in unistd.h and also provide its value via sysconf(),
as required by posix since we support posix_spawn().

branches: 1.52.12; 1.52.18;
Change _POSIX2_VERSION for shells and utilities to 200112L to match
_POSIX_VERSION. Requested by Channa.

- Bump posix version to 200112L, we should be mostly compliant now.
- Add text from FreeBSD explaining the values
- Add missing defines as undef'ed.

fix whitespace. no functional changes.

Add _PC_ACL_EXTENDED and _PC_MIN_HOLE_SIZE which are needed by zfs.

make the _POSIX_VDISABLE definition match the one in termios.h

explicitly define constants to 1, from Andy Shevchenko

setup _POSIX2_C_BIND per SUSv3, from Andy Shevchenko

Implement following constants and add support their to the UFS family of file
systems:
_PC_2_SYMLINKS
_PC_SYMLINK_MAX

From andy dot shevchenko at gmail dot com.

Add support for missing _SC_* constants for sysconf().
From andy dot shevchenko at gmail dot com

Moved comments for some _POSIX_* constants in front of their definition,
like all the rest of them.

branches: 1.42.2;
Add _SC_TTY_NAME_MAX.

A few more POSIX defs for threads.

branches: 1.40.6; 1.40.10; 1.40.12; 1.40.14;
Implementation of processor-sets, affinity and POSIX real-time extensions.
Add schedctl(8) - a program to control scheduling of processes and threads.

Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;

Proposed on: <tech-kern>. Reviewed by: <ad>.

branches: 1.39.4; 1.39.10;
Add _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF for sysconf(). These
are extensions but are provided by many Unix systems.

branches: 1.38.2;
Implementation of POSIX message queues.

Reviewed by: <ad>, <tech-kern>

branches: 1.37.2; 1.37.6; 1.37.8;
- Create sysctl nodes for AIO.
- Add POSIX defined system variables and constants of AIO_LISTIO_MAX and
AIO_MAX values. Both with _POSIX_ASYNCHRONOUS_IO, provide them in
sysconf(3) and getconf(1) interfaces.
- Clean up sysconf(3) for handling sysctl nodes dynamically.

Import of POSIX Asynchronous I/O.
Seems to be quite stable. Some work still left to do.

Please note, that syscalls are not yet MP-safe, because
of the file and vnode subsystems.

Reviewed by: <tech-kern>, <ad>

branches: 1.35.8; 1.35.12; 1.35.14;
Actually, we don't support CLOCK_SELECTION unless we have
pthread_condattr_{get,set}time() and clock_nanosleep().

We support the POSIX Clock Selection Option.

branches: 1.33.4; 1.33.8; 1.33.18;
merge ktrace-lwp.

branches: 1.32.6;
Extend fsync_range(2) to support the FDISKSYNC flag, which requests
that the sync be propogated out through the disk drive caches.

branches: 1.31.4; 1.31.6;
Implement sysconf(3) _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX for
the 1003.1-2001 Thread Safe Functions (TSF) getgrnam_r(3) and getpwnam_r(3).

These are not implemented in sysctl(3) "user.*", since that adds a lot
of complexity in the implementation for no real benefit.

Kernel portion of the fsync_range(2) system call. Written by Bill
Studenmund, and contributed by Wasabi Systems, Inc.

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

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

branches: 1.28.2;
Mention places where _SC_* values are hard-coded, so people who might
change them will know.

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 _POSIX_SEMAPHORES to 0: support ultimately depends on a kernel
configuration option.

Add sysconf(3) knobs for recent additions.

Provide _XOPEN_SHM.

we now support POSIX 1003.1b semaphores, add _POSIX_SEMAPHORES feature
define

Move _POSIX_THREADS to the right place and define a few other symbolic
constants for the features we gained with the merge of the nathanw_sa
branch.

Ok'd by thorpej.

Closes my PR 19930.

Add a sysconf(3) knob for {ATEXIT_MAX}.

Version times() so that programs compiled before the recent change to make
sysconf(_SC_CLK_TCK) return hz will work.

In detail:
__times13() returns values scaled by hz.
times() returns values scaled by 100.
<sys/times.h> renames times() to __times13().

_SC_CLK_TCK has changed from 3 to 39.
sysconf(3) returns 100.
sysconf(39) returns hz.
CLK_TCK is defined as sysconf(39).

branches: 1.19.8;
Add {POSIX_MONOTONIC_CLOCK} variables.

branches: 1.18.14; 1.18.16;
1003.1c: add {LOGIN_NAME_MAX}.

Add compile-time and run-time feature test knobs for the 1003.1 Mapped Files,
Process Memory Locking, Range Memory Locking and Memory Protection options.

branches: 1.16.4;
Introduce _PC_FILESIZEBITS.

Add _POSIX_SYNCHRONIZED_IO, _SC_SYNCHRONIZED_IO, _SC_IOV_MAX and _PC_SYNC_IO.
Fix a typo.

* Define _SC_PAGESIZE, _SC_PAGE_SIZE (1170 compatibility), _SC_FSYNC and
_SC_XOPEN_SHM to query the system page size, the availability of the
File Synchronization Option and the availability of System V style shared
memory, respectively, at runtime.
* Define _POSIX_FSYNC to evaluate to 1, since fsync(2) is always available.

Protect the deprecated L_* `whence' arguments to lseek() against _XOPEN_SOURCE,
too.

Bump _POSIX_VERSION to correspond to 1003.1-90

Describe the _POSIX_SAVED_IDS situation more clearly.

branches: 1.10.8;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

rcsid

update from lite

posix fix. fixes sendmail

Moved _POSIX2_VERSION macro from <limits.h>.

Added _SC_* and _CS_* constants used by POSIX.2.

branches: 1.3.4;
add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

branches: 1.1.1;
Initial revision

Add ACL support for FFS. From FreeBSD.

Provide sysconf(_SC_RTSIG_MAX) = SIGRTMAX - SIGRTMIN

Thanks nros@ for the correct definition

branches: 1.61.16;
Realtime signal support from GSoC 2016, Charles Cui.

According to Opengroup online specifications[1], _POSIX_CPUTIME and
_POSIX_THREAD_CPUTIME options should be present in unistd.h not
limits.h. Move them with other options.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html

branches: 1.59.2;
GSoC 2016 Charles Cui: Implement thread priority protection based on work
by Andy Doran. Also document the get/set pshared thread calls as not
implemented, and add a skeleton implementation that is disabled.
XXX: document _sched_protect(2).

GSoC 2016: Charles Cui: Add timer related macros
_POSIX_CPUTIME
_POSIX_THREAD_CPUTIME
_POSIX_DELAYTIMER_MAX

GSoC 2016: Charles Cui: add SEM_NSEMS_MAX

_SC_TIMERS_MAX

branches: 1.55.6;
Add shm_open(3) and shm_unlink(3) to support POSIX shared memory objects.
They are implemented using tmpfs (mounted at /var/shm).

Discussed on tech-{kern,userlevel} (quite a while ago).

branches: 1.54.2;
add _SC_PHYS_PAGES

branches: 1.53.2;
Define _POSIX_SPAWN in unistd.h and also provide its value via sysconf(),
as required by posix since we support posix_spawn().

branches: 1.52.12; 1.52.18;
Change _POSIX2_VERSION for shells and utilities to 200112L to match
_POSIX_VERSION. Requested by Channa.

- Bump posix version to 200112L, we should be mostly compliant now.
- Add text from FreeBSD explaining the values
- Add missing defines as undef'ed.

fix whitespace. no functional changes.

Add _PC_ACL_EXTENDED and _PC_MIN_HOLE_SIZE which are needed by zfs.

make the _POSIX_VDISABLE definition match the one in termios.h

explicitly define constants to 1, from Andy Shevchenko

setup _POSIX2_C_BIND per SUSv3, from Andy Shevchenko

Implement following constants and add support their to the UFS family of file
systems:
_PC_2_SYMLINKS
_PC_SYMLINK_MAX

From andy dot shevchenko at gmail dot com.

Add support for missing _SC_* constants for sysconf().
From andy dot shevchenko at gmail dot com

Moved comments for some _POSIX_* constants in front of their definition,
like all the rest of them.

branches: 1.42.2;
Add _SC_TTY_NAME_MAX.

A few more POSIX defs for threads.

branches: 1.40.6; 1.40.10; 1.40.12; 1.40.14;
Implementation of processor-sets, affinity and POSIX real-time extensions.
Add schedctl(8) - a program to control scheduling of processes and threads.

Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;

Proposed on: <tech-kern>. Reviewed by: <ad>.

branches: 1.39.4; 1.39.10;
Add _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF for sysconf(). These
are extensions but are provided by many Unix systems.

branches: 1.38.2;
Implementation of POSIX message queues.

Reviewed by: <ad>, <tech-kern>

branches: 1.37.2; 1.37.6; 1.37.8;
- Create sysctl nodes for AIO.
- Add POSIX defined system variables and constants of AIO_LISTIO_MAX and
AIO_MAX values. Both with _POSIX_ASYNCHRONOUS_IO, provide them in
sysconf(3) and getconf(1) interfaces.
- Clean up sysconf(3) for handling sysctl nodes dynamically.

Import of POSIX Asynchronous I/O.
Seems to be quite stable. Some work still left to do.

Please note, that syscalls are not yet MP-safe, because
of the file and vnode subsystems.

Reviewed by: <tech-kern>, <ad>

branches: 1.35.8; 1.35.12; 1.35.14;
Actually, we don't support CLOCK_SELECTION unless we have
pthread_condattr_{get,set}time() and clock_nanosleep().

We support the POSIX Clock Selection Option.

branches: 1.33.4; 1.33.8; 1.33.18;
merge ktrace-lwp.

branches: 1.32.6;
Extend fsync_range(2) to support the FDISKSYNC flag, which requests
that the sync be propogated out through the disk drive caches.

branches: 1.31.4; 1.31.6;
Implement sysconf(3) _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX for
the 1003.1-2001 Thread Safe Functions (TSF) getgrnam_r(3) and getpwnam_r(3).

These are not implemented in sysctl(3) "user.*", since that adds a lot
of complexity in the implementation for no real benefit.

Kernel portion of the fsync_range(2) system call. Written by Bill
Studenmund, and contributed by Wasabi Systems, Inc.

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

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

branches: 1.28.2;
Mention places where _SC_* values are hard-coded, so people who might
change them will know.

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 _POSIX_SEMAPHORES to 0: support ultimately depends on a kernel
configuration option.

Add sysconf(3) knobs for recent additions.

Provide _XOPEN_SHM.

we now support POSIX 1003.1b semaphores, add _POSIX_SEMAPHORES feature
define

Move _POSIX_THREADS to the right place and define a few other symbolic
constants for the features we gained with the merge of the nathanw_sa
branch.

Ok'd by thorpej.

Closes my PR 19930.

Add a sysconf(3) knob for {ATEXIT_MAX}.

Version times() so that programs compiled before the recent change to make
sysconf(_SC_CLK_TCK) return hz will work.

In detail:
__times13() returns values scaled by hz.
times() returns values scaled by 100.
<sys/times.h> renames times() to __times13().

_SC_CLK_TCK has changed from 3 to 39.
sysconf(3) returns 100.
sysconf(39) returns hz.
CLK_TCK is defined as sysconf(39).

branches: 1.19.8;
Add {POSIX_MONOTONIC_CLOCK} variables.

branches: 1.18.14; 1.18.16;
1003.1c: add {LOGIN_NAME_MAX}.

Add compile-time and run-time feature test knobs for the 1003.1 Mapped Files,
Process Memory Locking, Range Memory Locking and Memory Protection options.

branches: 1.16.4;
Introduce _PC_FILESIZEBITS.

Add _POSIX_SYNCHRONIZED_IO, _SC_SYNCHRONIZED_IO, _SC_IOV_MAX and _PC_SYNC_IO.
Fix a typo.

* Define _SC_PAGESIZE, _SC_PAGE_SIZE (1170 compatibility), _SC_FSYNC and
_SC_XOPEN_SHM to query the system page size, the availability of the
File Synchronization Option and the availability of System V style shared
memory, respectively, at runtime.
* Define _POSIX_FSYNC to evaluate to 1, since fsync(2) is always available.

Protect the deprecated L_* `whence' arguments to lseek() against _XOPEN_SOURCE,
too.

Bump _POSIX_VERSION to correspond to 1003.1-90

Describe the _POSIX_SAVED_IDS situation more clearly.

branches: 1.10.8;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

rcsid

update from lite

posix fix. fixes sendmail

Moved _POSIX2_VERSION macro from <limits.h>.

Added _SC_* and _CS_* constants used by POSIX.2.

branches: 1.3.4;
add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

branches: 1.1.1;
Initial revision

Provide sysconf(_SC_RTSIG_MAX) = SIGRTMAX - SIGRTMIN

Thanks nros@ for the correct definition

Realtime signal support from GSoC 2016, Charles Cui.

According to Opengroup online specifications[1], _POSIX_CPUTIME and
_POSIX_THREAD_CPUTIME options should be present in unistd.h not
limits.h. Move them with other options.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html

branches: 1.59.2;
GSoC 2016 Charles Cui: Implement thread priority protection based on work
by Andy Doran. Also document the get/set pshared thread calls as not
implemented, and add a skeleton implementation that is disabled.
XXX: document _sched_protect(2).

GSoC 2016: Charles Cui: Add timer related macros
_POSIX_CPUTIME
_POSIX_THREAD_CPUTIME
_POSIX_DELAYTIMER_MAX

GSoC 2016: Charles Cui: add SEM_NSEMS_MAX

_SC_TIMERS_MAX

branches: 1.55.6;
Add shm_open(3) and shm_unlink(3) to support POSIX shared memory objects.
They are implemented using tmpfs (mounted at /var/shm).

Discussed on tech-{kern,userlevel} (quite a while ago).

branches: 1.54.2;
add _SC_PHYS_PAGES

branches: 1.53.2;
Define _POSIX_SPAWN in unistd.h and also provide its value via sysconf(),
as required by posix since we support posix_spawn().

branches: 1.52.12; 1.52.18;
Change _POSIX2_VERSION for shells and utilities to 200112L to match
_POSIX_VERSION. Requested by Channa.

- Bump posix version to 200112L, we should be mostly compliant now.
- Add text from FreeBSD explaining the values
- Add missing defines as undef'ed.

fix whitespace. no functional changes.

Add _PC_ACL_EXTENDED and _PC_MIN_HOLE_SIZE which are needed by zfs.

make the _POSIX_VDISABLE definition match the one in termios.h

explicitly define constants to 1, from Andy Shevchenko

setup _POSIX2_C_BIND per SUSv3, from Andy Shevchenko

Implement following constants and add support their to the UFS family of file
systems:
_PC_2_SYMLINKS
_PC_SYMLINK_MAX

From andy dot shevchenko at gmail dot com.

Add support for missing _SC_* constants for sysconf().
From andy dot shevchenko at gmail dot com

Moved comments for some _POSIX_* constants in front of their definition,
like all the rest of them.

branches: 1.42.2;
Add _SC_TTY_NAME_MAX.

A few more POSIX defs for threads.

branches: 1.40.6; 1.40.10; 1.40.12; 1.40.14;
Implementation of processor-sets, affinity and POSIX real-time extensions.
Add schedctl(8) - a program to control scheduling of processes and threads.

Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;

Proposed on: <tech-kern>. Reviewed by: <ad>.

branches: 1.39.4; 1.39.10;
Add _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF for sysconf(). These
are extensions but are provided by many Unix systems.

branches: 1.38.2;
Implementation of POSIX message queues.

Reviewed by: <ad>, <tech-kern>

branches: 1.37.2; 1.37.6; 1.37.8;
- Create sysctl nodes for AIO.
- Add POSIX defined system variables and constants of AIO_LISTIO_MAX and
AIO_MAX values. Both with _POSIX_ASYNCHRONOUS_IO, provide them in
sysconf(3) and getconf(1) interfaces.
- Clean up sysconf(3) for handling sysctl nodes dynamically.

Import of POSIX Asynchronous I/O.
Seems to be quite stable. Some work still left to do.

Please note, that syscalls are not yet MP-safe, because
of the file and vnode subsystems.

Reviewed by: <tech-kern>, <ad>

branches: 1.35.8; 1.35.12; 1.35.14;
Actually, we don't support CLOCK_SELECTION unless we have
pthread_condattr_{get,set}time() and clock_nanosleep().

We support the POSIX Clock Selection Option.

branches: 1.33.4; 1.33.8; 1.33.18;
merge ktrace-lwp.

branches: 1.32.6;
Extend fsync_range(2) to support the FDISKSYNC flag, which requests
that the sync be propogated out through the disk drive caches.

branches: 1.31.4; 1.31.6;
Implement sysconf(3) _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX for
the 1003.1-2001 Thread Safe Functions (TSF) getgrnam_r(3) and getpwnam_r(3).

These are not implemented in sysctl(3) "user.*", since that adds a lot
of complexity in the implementation for no real benefit.

Kernel portion of the fsync_range(2) system call. Written by Bill
Studenmund, and contributed by Wasabi Systems, Inc.

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

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

branches: 1.28.2;
Mention places where _SC_* values are hard-coded, so people who might
change them will know.

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 _POSIX_SEMAPHORES to 0: support ultimately depends on a kernel
configuration option.

Add sysconf(3) knobs for recent additions.

Provide _XOPEN_SHM.

we now support POSIX 1003.1b semaphores, add _POSIX_SEMAPHORES feature
define

Move _POSIX_THREADS to the right place and define a few other symbolic
constants for the features we gained with the merge of the nathanw_sa
branch.

Ok'd by thorpej.

Closes my PR 19930.

Add a sysconf(3) knob for {ATEXIT_MAX}.

Version times() so that programs compiled before the recent change to make
sysconf(_SC_CLK_TCK) return hz will work.

In detail:
__times13() returns values scaled by hz.
times() returns values scaled by 100.
<sys/times.h> renames times() to __times13().

_SC_CLK_TCK has changed from 3 to 39.
sysconf(3) returns 100.
sysconf(39) returns hz.
CLK_TCK is defined as sysconf(39).

branches: 1.19.8;
Add {POSIX_MONOTONIC_CLOCK} variables.

branches: 1.18.14; 1.18.16;
1003.1c: add {LOGIN_NAME_MAX}.

Add compile-time and run-time feature test knobs for the 1003.1 Mapped Files,
Process Memory Locking, Range Memory Locking and Memory Protection options.

branches: 1.16.4;
Introduce _PC_FILESIZEBITS.

Add _POSIX_SYNCHRONIZED_IO, _SC_SYNCHRONIZED_IO, _SC_IOV_MAX and _PC_SYNC_IO.
Fix a typo.

* Define _SC_PAGESIZE, _SC_PAGE_SIZE (1170 compatibility), _SC_FSYNC and
_SC_XOPEN_SHM to query the system page size, the availability of the
File Synchronization Option and the availability of System V style shared
memory, respectively, at runtime.
* Define _POSIX_FSYNC to evaluate to 1, since fsync(2) is always available.

Protect the deprecated L_* `whence' arguments to lseek() against _XOPEN_SOURCE,
too.

Bump _POSIX_VERSION to correspond to 1003.1-90

Describe the _POSIX_SAVED_IDS situation more clearly.

branches: 1.10.8;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

rcsid

update from lite

posix fix. fixes sendmail

Moved _POSIX2_VERSION macro from <limits.h>.

Added _SC_* and _CS_* constants used by POSIX.2.

branches: 1.3.4;
add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

branches: 1.1.1;
Initial revision

Realtime signal support from GSoC 2016, Charles Cui.

According to Opengroup online specifications[1], _POSIX_CPUTIME and
_POSIX_THREAD_CPUTIME options should be present in unistd.h not
limits.h. Move them with other options.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html

branches: 1.59.2;
GSoC 2016 Charles Cui: Implement thread priority protection based on work
by Andy Doran. Also document the get/set pshared thread calls as not
implemented, and add a skeleton implementation that is disabled.
XXX: document _sched_protect(2).

GSoC 2016: Charles Cui: Add timer related macros
_POSIX_CPUTIME
_POSIX_THREAD_CPUTIME
_POSIX_DELAYTIMER_MAX

GSoC 2016: Charles Cui: add SEM_NSEMS_MAX

_SC_TIMERS_MAX

branches: 1.55.6;
Add shm_open(3) and shm_unlink(3) to support POSIX shared memory objects.
They are implemented using tmpfs (mounted at /var/shm).

Discussed on tech-{kern,userlevel} (quite a while ago).

branches: 1.54.2;
add _SC_PHYS_PAGES

branches: 1.53.2;
Define _POSIX_SPAWN in unistd.h and also provide its value via sysconf(),
as required by posix since we support posix_spawn().

branches: 1.52.12; 1.52.18;
Change _POSIX2_VERSION for shells and utilities to 200112L to match
_POSIX_VERSION. Requested by Channa.

- Bump posix version to 200112L, we should be mostly compliant now.
- Add text from FreeBSD explaining the values
- Add missing defines as undef'ed.

fix whitespace. no functional changes.

Add _PC_ACL_EXTENDED and _PC_MIN_HOLE_SIZE which are needed by zfs.

make the _POSIX_VDISABLE definition match the one in termios.h

explicitly define constants to 1, from Andy Shevchenko

setup _POSIX2_C_BIND per SUSv3, from Andy Shevchenko

Implement following constants and add support their to the UFS family of file
systems:
_PC_2_SYMLINKS
_PC_SYMLINK_MAX

From andy dot shevchenko at gmail dot com.

Add support for missing _SC_* constants for sysconf().
From andy dot shevchenko at gmail dot com

Moved comments for some _POSIX_* constants in front of their definition,
like all the rest of them.

branches: 1.42.2;
Add _SC_TTY_NAME_MAX.

A few more POSIX defs for threads.

branches: 1.40.6; 1.40.10; 1.40.12; 1.40.14;
Implementation of processor-sets, affinity and POSIX real-time extensions.
Add schedctl(8) - a program to control scheduling of processes and threads.

Notes:
- This is supported only by SCHED_M2;
- Migration of LWP mechanism will be revisited;

Proposed on: <tech-kern>. Reviewed by: <ad>.

branches: 1.39.4; 1.39.10;
Add _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF for sysconf(). These
are extensions but are provided by many Unix systems.

branches: 1.38.2;
Implementation of POSIX message queues.

Reviewed by: <ad>, <tech-kern>

branches: 1.37.2; 1.37.6; 1.37.8;
- Create sysctl nodes for AIO.
- Add POSIX defined system variables and constants of AIO_LISTIO_MAX and
AIO_MAX values. Both with _POSIX_ASYNCHRONOUS_IO, provide them in
sysconf(3) and getconf(1) interfaces.
- Clean up sysconf(3) for handling sysctl nodes dynamically.

Import of POSIX Asynchronous I/O.
Seems to be quite stable. Some work still left to do.

Please note, that syscalls are not yet MP-safe, because
of the file and vnode subsystems.

Reviewed by: <tech-kern>, <ad>

branches: 1.35.8; 1.35.12; 1.35.14;
Actually, we don't support CLOCK_SELECTION unless we have
pthread_condattr_{get,set}time() and clock_nanosleep().

We support the POSIX Clock Selection Option.

branches: 1.33.4; 1.33.8; 1.33.18;
merge ktrace-lwp.

branches: 1.32.6;
Extend fsync_range(2) to support the FDISKSYNC flag, which requests
that the sync be propogated out through the disk drive caches.

branches: 1.31.4; 1.31.6;
Implement sysconf(3) _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX for
the 1003.1-2001 Thread Safe Functions (TSF) getgrnam_r(3) and getpwnam_r(3).

These are not implemented in sysctl(3) "user.*", since that adds a lot
of complexity in the implementation for no real benefit.

Kernel portion of the fsync_range(2) system call. Written by Bill
Studenmund, and contributed by Wasabi Systems, Inc.

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

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

branches: 1.28.2;
Mention places where _SC_* values are hard-coded, so people who might
change them will know.

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 _POSIX_SEMAPHORES to 0: support ultimately depends on a kernel
configuration option.

Add sysconf(3) knobs for recent additions.

Provide _XOPEN_SHM.

we now support POSIX 1003.1b semaphores, add _POSIX_SEMAPHORES feature
define

Move _POSIX_THREADS to the right place and define a few other symbolic
constants for the features we gained with the merge of the nathanw_sa
branch.

Ok'd by thorpej.

Closes my PR 19930.

Add a sysconf(3) knob for {ATEXIT_MAX}.

Version times() so that programs compiled before the recent change to make
sysconf(_SC_CLK_TCK) return hz will work.

In detail:
__times13() returns values scaled by hz.
times() returns values scaled by 100.
<sys/times.h> renames times() to __times13().

_SC_CLK_TCK has changed from 3 to 39.
sysconf(3) returns 100.
sysconf(39) returns hz.
CLK_TCK is defined as sysconf(39).

branches: 1.19.8;
Add {POSIX_MONOTONIC_CLOCK} variables.

branches: 1.18.14; 1.18.16;
1003.1c: add {LOGIN_NAME_MAX}.

Add compile-time and run-time feature test knobs for the 1003.1 Mapped Files,
Process Memory Locking, Range Memory Locking and Memory Protection options.

branches: 1.16.4;
Introduce _PC_FILESIZEBITS.

Add _POSIX_SYNCHRONIZED_IO, _SC_SYNCHRONIZED_IO, _SC_IOV_MAX and _PC_SYNC_IO.
Fix a typo.

* Define _SC_PAGESIZE, _SC_PAGE_SIZE (1170 compatibility), _SC_FSYNC and
_SC_XOPEN_SHM to query the system page size, the availability of the
File Synchronization Option and the availability of System V style shared
memory, respectively, at runtime.
* Define _POSIX_FSYNC to evaluate to 1, since fsync(2) is always available.

Protect the deprecated L_* `whence' arguments to lseek() against _XOPEN_SOURCE,
too.

Bump _POSIX_VERSION to correspond to 1003.1-90

Describe the _POSIX_SAVED_IDS situation more clearly.

branches: 1.10.8;
New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'

new standard, minimally intrusive ID format

rcsid

update from lite

posix fix. fixes sendmail

Moved _POSIX2_VERSION macro from <limits.h>.

Added _SC_* and _CS_* constants used by POSIX.2.

branches: 1.3.4;
add rcs ids as necessary, and also clean up headers

Add consistent multiple-inclusion protection.

branches: 1.1.1;
Initial revision