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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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

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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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

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
Reviewed-on: https://go-review.googlesource.com/75972
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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
Reviewed-on: https://go-review.googlesource.com/75790
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Change-Id: I7b1ff99b46273ad32c26247a2435e674c9e42789
Reviewed-on: https://go-review.googlesource.com/75810
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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
Reviewed-on: https://go-review.googlesource.com/75650
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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
Reviewed-on: https://go-review.googlesource.com/74310
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Now that all BSD flavors support Poll, move the common implementation
into syscall_bsd.go

Change-Id: Id62a6163d41ef24e33f96540b661002b095a2fa1
Reviewed-on: https://go-review.googlesource.com/74290
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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
Reviewed-on: https://go-review.googlesource.com/74331
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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
Reviewed-on: https://go-review.googlesource.com/73872
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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.

Change-Id: Iefd23a44e983b4fcf210121776531df225014112
Reviewed-on: https://go-review.googlesource.com/73873
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If generating ptrace definitions for a particular pair fails for any
reason, a success message would still be shown. Avoid it in case there
was a failure.

Change-Id: Ica59c888586c055e8ef333a0db00bde2c4d15145
Reviewed-on: https://go-review.googlesource.com/73874
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CL 62111 removed the _SC_PAGESIZE definition from the types_*.go files
but did not re-generate ztypes_linux_sparc64.go. Remove the definition
manually because linux/spar64 is not yet covered by the new Docker-based
build system.

Change-Id: I1ddebc3efa0d9d23c925ca84de31f63a3a883a99
Reviewed-on: https://go-review.googlesource.com/73876
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Add godoc comments for Time{spec,val} methods Unix and Nano.
Also move them to timestruct.go to the other Time{spec,val} related
functionality.

Change-Id: I3b18c5d1bfb235ea4fea25a18fc34b85c21bb365
Reviewed-on: https://go-review.googlesource.com/73871
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Fix the header in the generated zptrace*_linux.go files to consistently
use single space after a period.

Change-Id: I527f27a68e14bc103639b1dd5734ec06ae267e01
Reviewed-on: https://go-review.googlesource.com/73875
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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: I61ec50c5ea7d6db43f7688ed925d6ed26a6bbc3a
Reviewed-on: https://go-review.googlesource.com/73650
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Change-Id: I7ae67ce410ae2816c2f3e8ecb26e46265aa11d7f
Reviewed-on: https://go-review.googlesource.com/73771Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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For pairs of GOARCH values that can execute each other's binaries on
the same system, such as 386 and amd64, add the definitions and
functions required to fetch and set registers when debugging either
variant.

Fixes golang/go#9739

Change-Id: I7896ddef7d341ffaee56614ebd080dc38c708ed4
Reviewed-on: https://go-review.googlesource.com/73555
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Copy CL 17488 into golang.org/x/sys/windows.

Change-Id: I4c6bf14982dd1fc2b8aa70ec16ad7b7c18e76bae
Reviewed-on: https://go-review.googlesource.com/73353Reviewed-by: Tim Cooper <tim.cooper@layeh.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Some of LazyProc's methods will panic if the procedure cannot be
found. This patch documents that fact.

Change-Id: If446a61e001ae04eaba0ff08b512df4def8a00b7
Reviewed-on: https://go-review.googlesource.com/73450Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Follow CL 20022 and consistently use single space after a period in
documentation.

Generated with:

$ perl -i -npe 's,^(\s*// .+[a-z]\.)  +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.)  +([A-Z])')

Change-Id: Ia29ad823668f060e81293e848a79fc4b4857d94b
Reviewed-on: https://go-review.googlesource.com/73530Reviewed-by: Ian Lance Taylor <iant@golang.org>
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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: I03f4396be2e190770abb219c1c5324ca55bcfa27
Reviewed-on: https://go-review.googlesource.com/73430
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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: I56ee0124a04c64e3ea51a1653901f2f4277983e6
Reviewed-on: https://go-review.googlesource.com/73370
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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: Ia57e3a92e6a50cb22edde8a31e1c4e70d894dc4c
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All the implementations of NsecToTimespec and NsecToTimeval were the
same other than types. Write a single version that uses
GOARCH/GOOS-specific setTimespec and setTimeval functions to handle the
types.

The logic in NsecToTimespec and NsecToTimeval caused times before 1970
to have a negative usec/nsec. The Linux kernel requires that usec
contain a positive number; for consistency, we do this for both
NsecToTimespec and NsecToTimeval.

Follow CL 30826 which did the same for syscall.

Change-Id: Id6c6f4fef8450251447d1a5b01f35c2a36b5aeb1
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Add a test for UtimesNanoAt which makes sure the timestamp of a symlink
is updated.

Change-Id: I819e43db1d390fb37f011b34e58ff9d3d06595f1
Reviewed-on: https://go-review.googlesource.com/72377
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All implementations of these functions are identical.

Follow CL 30819 which did the same for syscall.

Change-Id: I3c78f05ea12251306f3e100a006d266154a5238e
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To be used e.g. in
https://github.com/gokrazy/gokrazy/commit/2e60d5b8c8c35e0eed1bb155c7d709c729c8f041

Change-Id: If79ffec9021dc79375c861a0ddd9dd443adb4692
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They might be used as special values in struct Timespec. See
http://man7.org/linux/man-pages/man2/utimensat.2.html for details.

Change-Id: I1c2d6d7731ca7f077d033e51ee6421a4f2cfbb89
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