Some Linux architectures (e.g. arm64) don't have the getpgrp syscall,
use getpgid(0) to emulate it.

Update golang/go#10150.

This brings CL 8022 that has been applied to the syscall package to
x/sys.

Change-Id: I24c6d7e8b5b2f075ca4e68b142b2e03ab8a43342
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8023Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

For golang/go#9923

Change-Id: I7562d32f1bfcc35fe86d2e5fff26845737fd9ecb
Reviewed-on: https://go-review.googlesource.com/7917Reviewed-by: Rob Pike <r@golang.org>

POSIX defines [FRWX]_OK flags as the second arg to access() (Access()
here). Only F_OK was defined heretofore. This adds the missing
[RWX]_OK constants.

Fixes golang/go#6262

Change-Id: Ie96273db19aa21af92c46affea9509afe0efe63f
Reviewed-on: https://go-review.googlesource.com/7852Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Those libraries, routing message parsers, netlink message parsers,
berkeley packat filter are linux packet filter, are subsets and just for
the net package of standard library. It would be better keeping,
extending them at the net sub repository instead of here.

Updates golang/go#10150.

Change-Id: I1ca437bea2e2be7f7f8f6496d4db291629f49136
Reviewed-on: https://go-review.googlesource.com/7581Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

See golang.org/cl/4131 for context.

Change-Id: If2ba20a1adf9b40435628753ff7ca77577838813
Reviewed-on: https://go-review.googlesource.com/7760Reviewed-by: David Crawshaw <crawshaw@golang.org>

Also remove some empty source files while we are at it.

Change-Id: Ia3a35b274a0428196aee63ee2daacc533285d0ea
Reviewed-on: https://go-review.googlesource.com/2530Reviewed-by: Rob Pike <r@golang.org>

Updates golang/go#10068.

Change-Id: Ide71d7dfd2ad95387c1914b89bc743cbcda7d1de
Reviewed-on: https://go-review.googlesource.com/7582Reviewed-by: Rob Pike <r@golang.org>

Provides access to the GetComputerNameEx syscall.

This mirrors the change golang.org/cl/5852 in the standard library, but
provides public access to all name types provided by windows.

Change-Id: I5fbad5abe721de70e9d2b5dda2fafb7a9c419220
Reviewed-on: https://go-review.googlesource.com/6320Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Fixes golang/go#9705

Change-Id: Ie236633e0e6912de1fbf1274fa5cb3ada6ce3055
Reviewed-on: https://go-review.googlesource.com/6370Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I54489b2beda898103e622316d3095b54393039d6
Reviewed-on: https://go-review.googlesource.com/5414Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I01c5dd902bbc349b860600ec2b3d556e2dc406c9
Reviewed-on: https://go-review.googlesource.com/1921Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #9281

Change-Id: Ia4bb2e9af9f660f42202bb1d07920578cd0f9c3e
Reviewed-on: https://go-review.googlesource.com/2076Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: Ibc189f7e27ccdde94fd7da25a155636ee6bd6b25
Reviewed-on: https://go-review.googlesource.com/1920Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I0ebbb4f2da41bea7871f893332f2e4847b1bfefa
Reviewed-on: https://go-review.googlesource.com/1241Reviewed-by: Andrew Gerrand <adg@golang.org>

Fixes build breakage due to missing syscall import.

LGTM=adg, r
R=r, adg
CC=golang-codereviews
https://golang.org/cl/162650044

LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/171050043

It was part of recently submitted CL 149510043.

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/155320044

Add wrappers that provide Linux-y behavior around the FreeBSD extattr(2)
functions. This allows certain packages, like the fuse package to run
under FreeBSD.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/147850043

Import syscall so that Kill can refer to syscall.Signal.  Drop
termios constants from types_linux.go--all other systems get
them from mkerrors.sh.

Fixes golang/go#8865.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/152980044

apply latest changes made to syscall/mksyscall_windows.go

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/152200043

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/153810043

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/144980043

Dropped (or not moved) for some unknown reason. Restore them.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/140680044

That CL worked around a bug present in the
OS X Yosemite Public Beta versions 1 and 2.
Beta 3 (released today) has fixed the bug.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/144010043

LGTM=0intro
R=rsc, 0intro
CC=golang-codereviews
https://golang.org/cl/141870043

LGTM=rsc, aram, 0intro
R=rsc, aram, 0intro
CC=golang-codereviews
https://golang.org/cl/138280043

LGTM=bradfitz, r
R=r, bradfitz
CC=golang-codereviews
https://golang.org/cl/126090044

These are being deleted from go.sys because in general they can
only be implemented in close coordination with the runtime.

LGTM=0intro
R=golang-codereviews, 0intro
CC=golang-codereviews
https://golang.org/cl/132810043

These are being deleted from go.sys because in general they can
only be implemented in close coordination with the runtime.

LGTM=dave
R=rsc, dave, josharian
CC=golang-codereviews
https://golang.org/cl/129500043

These are being deleted from go.sys because in general they can
only be implemented in close coordination with the runtime.

LGTM=alex.brainman
R=alex.brainman
CC=golang-codereviews
https://golang.org/cl/132010043

71db3dc120af os: make SameFile handle paths like c:a.txt properly
ff34a3e84dc0 net: fix CNAME resolving on Windows

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/130250043

Also zsyscall_windows_386.go and zsyscall_windows_amd64.go
have same contents, so merge them into single file.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/124430043

If we use a local type, it won't compare properly with errors from
the rest of the standard library. Errors are the one type from syscall
that propagates through the system, so it's important to have only
one type for them.

Ditto for syscall.Signal.

LGTM=dave
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/123490043

All consts in errors_windows.go (except APPLICATION_ERROR) were
"invented" at the start of windows port to have minimal impact on
existing Go packages. No point keeping them around.
Also remove Errno, since we will be using syscall.Errno everywhere anyway.

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/128290044

Fix build.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/123510043

Don't re-implement these functions.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/124390043

Don't re-implement these functions.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/124350045

If we use a local type, it won't compare properly with errors from
the rest of the standard library. Errors are the one type from syscall
that propagates through the system, so it's important to have only
one type for them.

mkerrors_windows.sh is gone, so:
 - rename zerrors_windows.go and delete its DO NOT EDIT mark
 - delete the contentless zerrors_windows_*.go files

LGTM=rsc
R=rsc
CC=alex.brainman, golang-codereviews
https://golang.org/cl/122600043