Add a Getsockopt variant returning a string. This can e.g. be used to
retrieve a peer's SELinux or AppArmor labels using SO_PEERSEC.

Fixes golang/go#16374

Change-Id: Ia266bad1b0aef94ce19d378719ce1c1c976b4cc5
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Change-Id: I0f9bbda1053bea93b00e47a2d90f380d83c5eb16
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Change-Id: I40f99aab912c7002d113f82ccc60c9f68b9bc496
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Change-Id: I8adc5905f8c3da09b395845959def8cc580dd356
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The Utsname members are only 32 bytes on Dragonfly and the syscall
returns ENOMEM in case the value is longer than that. Like uname(3)
on Dragonfly, handle this case gracefully and just truncate the
value.

Change-Id: If617af1b6831cff6d4245f498dad9f264b8fd118
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Follow up for CL 80615

The NetBSD 8.0 builders don't seem to have these device nodes either.
Just remove them entirely.

Change-Id: Ib729574ed119f9ec78b06124ba4a5d9bbc74bf4d
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Fixes golang/go#16137

Change-Id: I0b7ebb71b95de3c262242ddb4032da5f470f5643
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Use /dev/ptyp* instead of /dev/ttyp* which don't seem to be available on
NetBSD 8.0+ anymore.

Change-Id: Idda6cc91b8cd26f5488852027b8d918f35a5e8fb
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Change-Id: Ib5eead82c8571a4becd4ddf6b1b87f8dcb2eb23e
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The SOCK_DGRAM version of the test was introduced for 1.10, and breaks
on older versions.

Fixes golang/go#22899

Change-Id: I97ce6f05a8a885541df823eae996cbf5d87428c2
Reviewed-on: https://go-review.googlesource.com/80275
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Follow the review comments by Brad in CL 79918.

Change-Id: Iedb27aa9582502a90231778f5032a2e0109a4621
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FreeBSD doesn't have a uname syscall but the information can be
retrieved using sysctls the same way as on Darwin.

Change-Id: I824c42490d1feed3f1ad3823427c01dd3e5ea3c1
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Looks like it's enough to just add wrappers pointing to the
corresponding SYS_FSTATAT{,64} or SYS_NEWFSTATAT syscall. Add a test to
verify that assumption which checks that the returned stat data matches
what is returned by Stat/Lstat.

Also add the AT_NO_AUTOMOUNT constant which may be used for the flags
parmeter.

Fixes golang/go#14216

Change-Id: I73f27b483bd97d2dcf09d4b95a7957e75d194395
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dragonfly/386 isn't a valid GOOS/GOARCH pair and there are no generated
files for this pair in x/sys/unix.

Follows CL 79675 which did the same for syscall.

Change-Id: Ie70937b464fa911a43c26515bcac1c03740dc1fe
Reviewed-on: https://go-review.googlesource.com/79676Reviewed-by: Ian Lance Taylor <iant@golang.org>

Add the same workaround as already present for 386 (CL 14151), amd64 (CL
14091) and arm64 (CL 14094) on darwin.

Fixes golang/go#22839

Change-Id: I7eee543df204410dd3328dccb7d81166f77e1e2f
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testing.Run was introduced in Go 1.7. Skip the tests using it if built
with Go 1.6 or below.

Change-Id: I24c81426ea6d3eaaca5a565ad79b62b30e645d04
Reviewed-on: https://go-review.googlesource.com/78255Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes golang/go#22801

Change-Id: I1f466e26bcdf52bdd0df09bd81e31dde10347862
Reviewed-on: https://go-review.googlesource.com/78618
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Change-Id: I6e587cf1b7e8532f45df03bf94e209aafe8f81fd
Reviewed-on: https://go-review.googlesource.com/78235Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Use sort.Search to look up sysctl mib values from names instead of using
a hand-crafted binary search.

Also add a simple test to verify sysctl is still working after the
change.

Change-Id: I844840ac434a704b14c3166c3730daffabd2f347
Reviewed-on: https://go-review.googlesource.com/76930
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Darwin doesn't have a uname syscall but the same information can be
retrieved using sysctls. Use the raw sysctl numbers instead of doing the
roundtrip via SysctlString in order to void the additional sysctl calls
in nametomib and SysctlRaw.

This implementation follows the one in
https://opensource.apple.com/source/Libc/Libc-1244.1.7/gen/uname.c

Change-Id: I19541e2a6700f84ced0549a8fb86faa8cb5e6fbe
Reviewed-on: https://go-review.googlesource.com/77270
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PtracePeekUser was already added in CL 38638, also add its "counterpart"
allowing to modify the tracee's user area.

Change-Id: Id84e85fe17b5cab7df5ecc83b6b7b8a39241241d
Reviewed-on: https://go-review.googlesource.com/76670Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Id71df85e55e586b33fac66c5494291e11db8ed14
Reviewed-on: https://go-review.googlesource.com/76471Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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The unexported function syscallMode was added in CL 47290 but was never
used anywhere. Remove it.

FWIW this should also fix the build failure on plan9, as the file in
question was lacking build tags.

Change-Id: Icfd6b2dbcd66ceb2065c945d8a5a6d55e634fe5e
Reviewed-on: https://go-review.googlesource.com/76510
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Re-run tip gofmt to remove empty lines before the first comment in a
block (CL 71990).

Change-Id: I10bed93b88fd4fa4345f9f8f930c45db9f0d6e59
Reviewed-on: https://go-review.googlesource.com/76191
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To be used e.g. in github.com/mdlayher/vsock

Change-Id: I52148a6e6c53c022c07e2cc8bf7348a96445c17b
Reviewed-on: https://go-review.googlesource.com/76193
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Add IoctlGetInt/IoctlSetInt, IoctlGetTermios/IoctlSetTermios and
IoctlGetWinsize/IoctlSetWinsize on NetBSD. These are similar to the
already existing implementations on Linux, Darwin and Solaris.

Change-Id: I6c38d946b9f461c8e4c6c5e044aaff9b37e4b02f
Reviewed-on: https://go-review.googlesource.com/76171Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Add IoctlGetInt/IoctlSetInt, IoctlGetTermios/IoctlSetTermios and
IoctlGetWinsize/IoctlSetWinsize on Dragonfly. These are similar to the
already existing implementations on Linux, Darwin and Solaris.

Change-Id: I5a5a7ef69f02e01a4216779df5c927f241e5cec0
Reviewed-on: https://go-review.googlesource.com/76170Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Add IoctlGetInt/IoctlSetInt, IoctlGetTermios/IoctlSetTermios and
IoctlGetWinsize/IoctlSetWinsize on OpenBSD. These are similar to the
already existing implementations on Linux, Darwin and Solaris.

Change-Id: I99e9434fa50338a0b5d825490513e9383539727d
Reviewed-on: https://go-review.googlesource.com/75791
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Update the syscall numbers and error constants on macOS 10.13 with iOS
SDK 11.1.

The removed syscalls are all removed or marked as deprecated/old in the
following list

  https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/kern/syscalls.master

which according to

  https://opensource.apple.com/release/macos-1013.html

is the kernel version used for macOS 10.13.

The poll function was moved around because I missed to regenerate the
zsyscall_darwin_*.go files in CL 74290.

Change-Id: I747c8c842f78f3db8d25b46759265aa99da9d739
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Now that go tip runs vet during go test	(CL 74356), the x/sys/windows
test fails due to the following vet error:

  syscall_windows_test.go:84: Fatal call has possible formatting directive %x

Fix it by using Fatalf instead.

Change-Id: I02536312c00bc9002400b29b5b5acef879a0e51a
Reviewed-on: https://go-review.googlesource.com/75973Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes the following vet error:

  syscall_linux_test.go:181: golang.org/x/sys/unix.Timeval composite literal uses unkeyed fields

Change-Id: I6973ad4ecd54b542074610a755573f98eb23f343
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Change-Id: I7b1ff99b46273ad32c26247a2435e674c9e42789
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Use to setarrlist to implement UtimesNanoAt with nanosecond precision
(on Mac OS 10.13 with APFS). Translate AT_SYMLINK_NOFOLLOW to
FSOPT_NOFOLLOW correspondingly.

Change-Id: I1468a1f4eecb53b2280ff6329b1ec64e204701f1
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Follow CL 74952 for x/sys/unix.

Update golang/go#22528

Change-Id: Id146da75b80a64cfa4eac28e9bb7b3befe944718
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Poll is now supported for all unix systems. Also enable TestPoll for all
of them.

Change-Id: Id6250702bf0d29c49fbeeed4cca21d232b72666a
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Now that all BSD flavors support Poll, move the common implementation
into syscall_bsd.go

Change-Id: Id62a6163d41ef24e33f96540b661002b095a2fa1
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In order to make conversion to string easier, change the Utsname
members from int8 array to byte array.

Also add a test on Linux for Uname and the string conversion of the
Utsname members.

Fixes golang/go#20753

Change-Id: Iec793dfb4a6dd8f3523cf0b6284a6162074f2e9e
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Tested with TestPoll extracted from syscall_linux_test.go.

Now that Poll is supported on all unix flavors, TestPoll can be moved
to syscall_unix_test.go in a successive CL.

Change-Id: Ibd5ff3f45198008464522c3b165f2af7865ce81e
Reviewed-on: https://go-review.googlesource.com/73881Reviewed-by: Ian Lance Taylor <iant@golang.org>

Tested with TestPoll extracted from syscall_linux_test.go. Once Poll is
supported on all OSes this test can be moved to syscall_unix_test.go.

Change-Id: Ic7ad2e749039e2e81612c2085d6fab73581d59f9
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Update go to 1.9.2 in the Dockerfile used to generate the Linux go files.

The update also changes some zerror definitions: RLIM_INFINITY is
assigned to Rlimit.{Cur,Max} which are both uint64 on all architectures.
PR_SET_PTRACER_ANY is used with Prctl which expects an uintptr.

With the current version, an "constant -1 overflows uint64" error would
result if these constants were used directly without type conversion.

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