Capsicum support was added by https://golang.org/cl/47290, but only for
amd64. This broke the freebsd/386 build which was subsequently fixed by
http://golang.org/cl/51270. However, even with this fix the tests still
fail to build due to the missing Capsicum functions and types.

Fix the build/test on freebsd/386 for real by re-running mkall.sh on
FreeBSD 11.1-RELEASE (inside VirtualBox) to get all the Capsicum
functions and types.

Some zerrors constants were removed or converted to enums in the FreeBSD
headers. Manually move them to a dedicated file. Do the same for amd64,
where these constants were removed by accident in
https://golang.org/cl/47290.

Updates golang/go#21136

Change-Id: I54fe2c4567674b07dedad677756369a43a1f0ef6
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The packet_mreq structure is used on Linux to modify the behavior
of packet sockets using setsockopt.  See 'man 7 packet' for more
details.

Change-Id: I34e5b99a6b6eb1f23d49a9c9f25ce7b77121c8f0
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Add the SizeofIovec constant corresponding to type Iovec.

Change-Id: Icde241b8cac3bc89806f0081a4021598bf0ef7cf
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Syncfs is Linux-specific system call to synchronize to disk one
filesystem specified by fd to any of its files.

See http://man7.org/linux/man-pages/man2/syncfs.2.html for details.

Change-Id: Ia2ad6208c3fa0e9c40d5112ce938edd5d374131d
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It was broken by https://golang.org/cl/47290

Fixes golang/go#21136

Change-Id: I2a08869fd44a9776f0dc7d461814e1df4e606b5d
Reviewed-on: https://go-review.googlesource.com/51270Reviewed-by: Ian Lance Taylor <iant@golang.org>

Remove a duplicate build tag in unix/flock.go. Keep the alphabetically
sorted version below the copyright header.

Change-Id: Ie3a6e5e01e5e4114960fdf63111a68d3b2b8de47
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Add Major, Minor and Mkdev functions for converting devices numbers to
their major/minor components and vice versa.

The functions follow the behavior of glibc's corresponding macros. Also
add an explanatory comment about the device number format, so the magic
numbers make more sense.

Test the conversion macros with some well-known device numbers for
devices which should be present on any Linux system.

Fixes golang/go#8106

Change-Id: Id336317985d6ac85ee83bc54e5f23703257c9121
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Add the Msync function on darwin/amd64 and darwin/386.

Fixes golang/go#8245

Change-Id: I1d234bb97731934c36d926ed2332c93b35b2f641
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Add the Msync function on Linux. See
http://man7.org/linux/man-pages/man2/msync.2.html

Updates golang/go#8245

Change-Id: I964259bafc8d4fbca09961443f21c4278bf56706
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Add the Faccessat, Fchownat, Linkat, Mkdirat, Openat, Readlinkat,
Renameat, Symlinkat and Unlinkat functions (to conform to POSIX.1-2008)
and make Fchmodat available on all architectures, not just amd64. Also
add the missing AT_* constants.

Generated on Mac OS 10.11 (Darwin 15.6.0) for darwin/amd64 and
darwin/386 only.

Fixes golang/go#14458

Change-Id: I6d9258864383ea77f9cad058ee8ba2c728213b40
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Change-Id: Ibb1426ebd18d27ee9f144af0fd8c94b08c06f7d7
Reviewed-on: https://go-review.googlesource.com/47290Reviewed-by: Ian Lance Taylor <iant@golang.org>
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Add IoctlGetWinsize and IoctlSetWinsize to retreive and manipulate
Winsize structures on Linux, akin to the already existing implementation
on Solaris.

Also remove the named result parameter for IoctlSetInt and
IoctlSetTermios, as they add no additional use.

Change-Id: Id349d1d6a21d5c9a05943f4dcc3a275613ccf7b8
Reviewed-on: https://go-review.googlesource.com/49231
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Add the Mkfifoat function on Linux, akin to the existing Mkfifo function
but taking an additional dirfd parameter. See
http://man7.org/linux/man-pages/man3/mkfifo.3.html

Originally requested in golang/go#14216

Also remove the named result parameter for Mkfifo, as they add no
additional use (suggested by Brad Fitzpatrick).

Change-Id: I7b759752abf3e1469d7f883a7f13313e3062aeb4
Reviewed-on: https://go-review.googlesource.com/48530Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Add additional SIOC* socket ioctl constants from linux/sockios.h on
Linux.

Change-Id: I76f8c9d9d0015d398ee52844b3c9f506cd182329
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Add the PERF_EVENT_IOC_* constants on Linux which are used to
enable/disable/configure perf events. Also add the PERF_IOC_FLAG_GROUP
constant which might be using as part of the ioct argument. See section
"perf_event ioctl calls" in
http://man7.org/linux/man-pages/man2/perf_event_open.2.html

Change-Id: I92fb8f6ef5cc53711f00db566d8e277cdf1cd607
Reviewed-on: https://go-review.googlesource.com/47770Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Change-Id: I5709137db7308934e627d866da1cc8aa5abca7db
Reviewed-on: https://go-review.googlesource.com/47310Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I5bb10469bab144f5e42c7bcf6ee8717d3fd0d4e4
Reviewed-on: https://go-review.googlesource.com/47337Reviewed-by: Matt Layher <mdlayher@gmail.com>
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Change-Id: I0dee287567bdbf882e804bcd5ed7dcd6f748b30c
Reviewed-on: https://go-review.googlesource.com/47340Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Fixes golang/go#20086

Change-Id: Ifdc2561fe6cc125fa45a57bad9750f3f3f055e66
Reviewed-on: https://go-review.googlesource.com/47335
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Add IoctlGetTermios and IoctlGetTermios to retreive and manipulate
Termios structures on Linux, akin to the already existing implementation
or Solaris.

If desired, functions conforming to POSIX tcgetattr/tcsetattr could be
implemented on top of these.

Change-Id: I2a71061bad2e632c597b6f6184ad6374c46a43ee
Reviewed-on: https://go-review.googlesource.com/47330Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Add the UMOUNT_NOFOLLOW on Linux, available since Linux 2.6.34. See
http://man7.org/linux/man-pages/man2/umount.2.html and
https://github.com/torvalds/linux/commit/db1f05bb85d796

Fixes golang/go#18316

Change-Id: I5c7dafdbb311f287b6cf290aa8a0eaf2940b9834
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Add the remaining AcceptX commands (AcceptParamChange,
AcceptNetBindChange, AcceptHardwareProfileChange, AcceptPowerEvent, and
AcceptSessionChange) to the windows/svc package. Also add support for
these to updateStatus such that a service can actually accept these
commands.

Change-Id: I11191e7798489b3222a3e76ba55129f10fd202ab
Reviewed-on: https://go-review.googlesource.com/46722Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Add the SECCOMP_MODE_DISABLED, SECCOMP_MODE_STRICT and
SECCOMP_MODE_FILTER constants to be used with the PR_SET_SECCOMP prctl.
See http://man7.org/linux/man-pages/man2/prctl.2.html

Change-Id: Iacd1ffaeced4ae95e780a09038d35b763778a3d3
Reviewed-on: https://go-review.googlesource.com/46691Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Add the XATTR_CREATE and XATTR_REPLACE constants, to be used in the
flags parameter of Setxattr/Lsetxattr. See
http://man7.org/linux/man-pages/man2/setxattr.2.html

Fixes golang/go#14454

Change-Id: I868ac019fe3be755e0f6f8bff734f843ba602ee9
Reviewed-on: https://go-review.googlesource.com/46690Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Currently Linux' fchmodat(2) syscall implementation doesn't support the
flags parameter (though it might in future versions [1]). Fchmodat in
x/sys/unix takes the parameter and (wrongly) passes it on to the syscall
which will ignore it.

According to the POSIX.1-2008 manual page [2], AT_SYMLINK_NOFOLLOW is
the only valid value for the flags parameter and EOPNOTSUPP should be
returned in case changing the mode of a symbolic link is not supported
by the underlying system.  EINVAL should be returned for any other value
of the flags parameter.

  [1] https://patchwork.kernel.org/patch/9596301/
  [2] http://pubs.opengroup.org/onlinepubs/9699919799/functions/chmod.html

Change the Fchmodat implementation accordingly and also add the
corresponding test.

Fixes golang/go#20130

Change-Id: I62e677e6674d3702eaf388af0ac3d7e623a35c24
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Add API to list services installed on the system.

Fixes golang/go#20596

Change-Id: Ifa2f20ef15ccb962bd21d03788ce931dd45f2630
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Add support for the eventfd2 syscall on Linux.

Use the eventfd2 syscall instead of eventfd, as the latter does not
provide a flags argument and glibc also maps its eventfd() function to
the eventfd2 syscall, see the Notes section in
http://man7.org/linux/man-pages/man2/eventfd.2.html

Also add the corresponding flags values EFD_CLOEXEC, EFD_NONBLOCK and
EFD_SEMAPHORE.

Change-Id: Ia8c99e68d5966ab5c7ebe7e45423943fd7d8214e
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Add the following additional Getrlimit/Setrlimit resource constants (see
http://man7.org/linux/man-pages/man2/getrlimit.2.html):

  RLIMIT_LOCKS
  RLIMIT_MEMLOCK
  RLIMIT_MSGQUEUE
  RLIMIT_NICE
  RLIMIT_NPROC
  RLIMIT_RSS
  RLIMIT_RTPRIO
  RLIMIT_RTTIME
  RLIMIT_SIGPENDING

Fixes golang/go#14854

Change-Id: I302ff67d6d1b11d94f18614490fbd634a8caec19
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Add support for the lgetxattr, llistxattr, lremovexattr and lsetxattr on
Linux, akin to the already existing getxattr, listxattr, removexattr and
setxattr syscalls.

These variants are identical to the already existing variants. except in
the case of a symbolic link where the extended attribute operation is
applied to the link itself rather than to the file that it refers to.
See:

  http://man7.org/linux/man-pages/man2/getxattr.2.html
  http://man7.org/linux/man-pages/man2/listxattr.2.html
  http://man7.org/linux/man-pages/man2/removexattr.2.html
  http://man7.org/linux/man-pages/man2/setxattr.2.html

Fixes golang/go#14116

Change-Id: I786953db8bf862566f54bdd745cc1feca5031be7
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This CL adds basic integer get/set functions which wrap a generic
ioctl call.  The API is similar the one introduced for solaris/amd64
in CL 14587, but the request parameter has been changed to a uint
instead of an int.  This makes requests with a number larger than the
maximum signed 32-bit integer work on linux/386.

For consistency, the solaris/amd64 API has also been updated to make
use of a uint instead of an int for the request number.

Fixes golang/go#20474

Change-Id: Iaae1ee2e4bb4bfcc420dcec252fe53c8d90ce81d
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The args passed to Mgr.CreateService end up as the command-line
arguments (available via os.Args), not as the args passed to
Svc.Handler.Execute.

Fixes golang/go#20440

Change-Id: I55a1ec3432b377082c018fe960114c96350e8978
Reviewed-on: https://go-review.googlesource.com/43714Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This CL adds support for the ADD_KEY, REQUESET_KEY, and KEYCTL syscalls.
These syscalls allow access to the kernel keyring facilities. In C code,
these syscalls are wrapped by the libkeyutils package. See:
	http://man7.org/linux/man-pages/man7/keyutils.7.html

The ADD_KEY and REQUEST_KEY calls are fairly straightforward, but the
KEYCTL syscall is a multiplexor for a number of key management
functions. See:
	http://man7.org/linux/man-pages/man3/keyctl.3.html

The Go bindings for the KEYCTL functions attempt to replicate what
libkeyutils does. This is done via generated helper functions.

Change-Id: If8c97d4ef5bce14c43dee3e6772ded42dc3c595a
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This allows services written with this library to register for more
advanced notifications like SERVICE_CONTROL_DEVICEEVENT for example.

Also the code now exposes the service status handle through a new
api call, because the handle is needed to register for such
notifications and can not be obtained by any other means.

Change-Id: I80796e1dd9d94ec9d6c236d0413b17288c67fe1f
Reviewed-on: https://go-review.googlesource.com/42812Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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Change-Id: I4ef179aacaf0694cd7661b4d9972ce85abeee8df
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Reference: https://www.illumos.org/man/2/statvfs

Change-Id: If7af43da35b3204f5069a48eb08426a145544008
Reviewed-on: https://go-review.googlesource.com/43490Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Introduces the CopyFileRange syscall which first appears in Linux 4.5.
Allows copying file content between file descriptors within the kernel
without transferring data to user space. This syscall also allows the
kernel to take advantage of reflinking or other fast copy methods on
supported file systems.
http://man7.org/linux/man-pages/man2/copy_file_range.2.html

Change-Id: Id365f1e5d4d5ddf7159478e3a13084c9576ebd5c
Reviewed-on: https://go-review.googlesource.com/39992Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

On mips, "struct user" bears no relation to the actual structure used by
PTRACE_GETREGS. The real structure is "struct pt_regs" which is declared
in asm/ptrace.h

Fixes golang/go#20338.

Change-Id: I604d27bd2b0a0903784380cbd3fa2fd9b9811fa5
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After this commit the testsuite passes on mips64le.

Fixes golang/go#20340.

Change-Id: I6b3f673674af107fd6d249ccf5e695e0e50a41bb
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Useful since GetSystemTimePreciseAsFileTime is Windows 8+.

Change-Id: I736bd0668aaf6ad086f6465b8b9a17f1943f0570
Reviewed-on: https://go-review.googlesource.com/43312Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This is a backport of https://go-review.googlesource.com/30171.

Updates golang/go#7402.

Change-Id: I4e79570964c248ec52acf14d0ed8306e52073a51
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