Fixes golang/go#10239.

Change-Id: I3ae657b57ca7bef31207780477c44939c0bdc8b5
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/10185Reviewed-by: Rob Pike <r@golang.org>

Fixes golang/go#10813.

Change-Id: I3ae657b57ca7bef31207780477c44939c0bdc8b4
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/10184Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I62774b8ee0c1a7cc1a3b7009ca860e3fd64a6564
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/10182Reviewed-by: Rob Pike <r@golang.org>

Built with 3.18 linux kernel headers on Gentoo.

Change-Id: Ic21a315eb7569c6682f5cb2c991f0966245197f9
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/10044Reviewed-by: Rob Pike <r@golang.org>

Make Plan 9 implementation similar to Unix.

Fixes golang/go#10803.

Change-Id: Ib2f069a68370792daf926ec2a393f9cf16c2816b
Reviewed-on: https://go-review.googlesource.com/10104Reviewed-by: Rob Pike <r@golang.org>

This CL includes changes from:

http://golang.org/cl/9805
http://golang.org/cl/9806
http://golang.org/cl/9901

Change-Id: I1f41a8215f9f760c0d3b84596e37bf48bf4c9bc2
Reviewed-on: https://go-review.googlesource.com/10132Reviewed-by: Rob Pike <r@golang.org>

Fixes build.

Change-Id: Ib090c951b192ec5d4e145aa2d302d140f99b1417
Reviewed-on: https://go-review.googlesource.com/10099Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Make windows implementation similar to unix.

Updates golang/go#10803 (0intro will close the issue)

Change-Id: I6f6a7b1c84f54b1ec92f0346a9998df34235c71a
Reviewed-on: https://go-review.googlesource.com/10077Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I8ed64dcb1c1a2119ce6f15fa1be55fbe0b0c637e
Reviewed-on: https://go-review.googlesource.com/10087Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>

Go1.4 does not recognize arm64 and ppc64le as valid GOARCH values, so
we need explicit build tags.

Change-Id: I1a886c132ae398d9f92b2c2b33d2a4827bbdb9d4
Reviewed-on: https://go-review.googlesource.com/10083Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes plan9 and windows build.

Change-Id: I3d913441a4f3f3f3da82ab74ef165b91d05eb8d3
Reviewed-on: https://go-review.googlesource.com/10078Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This is a copy of https://golang.org/cl/154020043 in the syscall package.

Fixes golang/go#10804

Change-Id: I6f6177e30c105c8065fdc8cc351e899090e160a9
Reviewed-on: https://go-review.googlesource.com/10076Reviewed-by: Minux Ma <minux@golang.org>

This incorporates changes from https://golang.org/cl/123290043 and
https://golang.org/cl/127320043.

Files generated on Ubuntu Trusty.

Change-Id: I669c60714e857ef5f06515cd3b65dfc94785e179
Reviewed-on: https://go-review.googlesource.com/10060Reviewed-by: Rob Pike <r@golang.org>

This incorporates generation script changes from
http://golang.org/cl/7143.

Files generated on Ubuntu Trusty.

Change-Id: I28cfa0993573e1b280c549a67f453c0fb01dee2f
Reviewed-on: https://go-review.googlesource.com/10038Reviewed-by: Rob Pike <r@golang.org>

This applies the following CLs from the syscall package:
http://golang.org/cl/9962
http://golang.org/cl/9966
http://golang.org/cl/9924

It also adds arm64/ppc64 support to mkall.sh and mksysnum_linux.pl.

Change-Id: I84fbfde2a2876dbf6d16c6159e847195c274b396
Reviewed-on: https://go-review.googlesource.com/10037Reviewed-by: Rob Pike <r@golang.org>

This is a copy of http://golang.org/cl/9870 in the syscall package.

This is in preparation for arm64 support, as the arm64 Linux kernel
does not have an inotify_init system call, only inotify_init1.

Update golang/go#10150.

Change-Id: I9224a094af79adbb2f5714ad977b195d5a941eb0
Reviewed-on: https://go-review.googlesource.com/10036Reviewed-by: Rob Pike <r@golang.org>

This copies http://golang.org/cl/8723 from the syscall package.

Quoting the original CL:

    This is clumsy, but currently cover tool fails as:

    $ go test -run=none -cover syscall
    syscall_linux_amd64.go:15: can only use //go:noescape with external func imp
    FAIL        syscall [build failed]

    This happens because cover tool mishandles //go: comments.
    r and gri said that fixing cover is infeasible due to go/ast limitations.

    So at least fix the offending code so that coverage works.
    This come up in context of coverage-guided fuzzing which works best
    with program-wide coverage.

Change-Id: Id9e243968a4eb7ae75a585877fdf3192c89e419c
Reviewed-on: https://go-review.googlesource.com/10035Reviewed-by: Rob Pike <r@golang.org>

This brings over three CLs from the main syscall package:
http://golang.org/cl/5833
http://golang.org/cl/5835
http://golang.org/cl/5837

Pipe, Pipe2, and Dup2 are moved from syscall_linux.go to the GOARCH
specific variants.  On 386 and amd64, Linux kernel version 2.6.23 (the
documented minimum Linux kernel version the Go distribution supports)
does not support the pipe2 system call, so Pipe continues to call
pipe.  On ARM, Pipe now calls pipe2.

Several system calls are reimplemented in terms of the *at syscalls,
passing AT_FDCWD to indicate that pathnames are to be interpreted
relative to the current directory.  The *at syscalls were added in
Linux kernel version 2.6.16.

This is in preparation for arm64 support, as the arm64 Linux kernel
does not provide the traditional syscall variants.

Change-Id: Id6bc6097dc5f4324cd9e429c5e1f3a411a08ce42
Reviewed-on: https://go-review.googlesource.com/10032Reviewed-by: Rob Pike <r@golang.org>

Bring in http://golang.org/cl/138650044 from syscall package.

Change-Id: I554b0b31b981c682b6826644564971321a55c9e4
Reviewed-on: https://go-review.googlesource.com/10030Reviewed-by: Rob Pike <r@golang.org>

Port http://golang.org/cl/9714 from the main syscall package.

Change-Id: I85e3f119777b0e1f52dfd10365fd30c900120dc2
Reviewed-on: https://go-review.googlesource.com/9961Reviewed-by: Minux Ma <minux@golang.org>

I meant to do this earlier but forget to "git add".

Change-Id: I14b777b5b9fa5b121809c5821719da3ec4a5e0ce
Reviewed-on: https://go-review.googlesource.com/9960Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

With these changes the package builds, and the tests pass, using gccgo
on amd64 GNU/Linux.  I have not tested other systems but I don't know
why they wouldn't work.

Change-Id: I727365daef55f158657eb89afbfcdbf3334610d1
Reviewed-on: https://go-review.googlesource.com/9842Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Includes 386, amd64, and arm for Linux.

Change-Id: I428bfb732141448659a94dc6e2ab7a98efea507a
Reviewed-on: https://go-review.googlesource.com/9766Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: David Symonds <dsymonds@golang.org>

This CL adds the Utimensat syscall and AT_SYMLINK_NOFOLLOW constant.

This is required for setting the access/modification times on symlinks.

In addition, it updates the UtimesNano function to pass 0 as the flags
parameter, to avoid potentially passing junk.

Change-Id: I280645f3f53173628b1e1986bc7a47bac254fcf8
Reviewed-on: https://go-review.googlesource.com/9379Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I58bb446aaa387b31d8a9ff4217793a170b96a7e2
Reviewed-on: https://go-review.googlesource.com/9104Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I02bfcdeac44167d1dbeb15bcd5c82111fba3f527
Reviewed-on: https://go-review.googlesource.com/9234Reviewed-by: Rob Pike <r@golang.org>

Change-Id: Ia7c3d6250c041b95aa43ca5ca2a92251c480ef77
Reviewed-on: https://go-review.googlesource.com/8843Reviewed-by: Rob Pike <r@golang.org>

From main repo: https://go-review.googlesource.com/#/c/6350
                https://go-review.googlesource.com/#/c/6385

Change-Id: Ieba5ff60fc501be9aa4739860c8fe026f8b3eb67
Reviewed-on: https://go-review.googlesource.com/8721Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

From main repo: https://go-review.googlesource.com/#/c/2167

Change-Id: I2043458a432ccd2aa8b206adc107ac7b215e355f
Reviewed-on: https://go-review.googlesource.com/8720Reviewed-by: Rob Pike <r@golang.org>

Related issue golang/go#10150

Change-Id: I38e3e13238624655bb828d501bc865ff8a4312e9
Reviewed-on: https://go-review.googlesource.com/7493Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

According to ReadDirectoryChangesW documentation, this parameter is
perfectly valid and its absence in current enumeration makes it incomplete.

Internal flags like FILE_NOTIFY_CHANGE_EA were not added.

Change-Id: I9d4182dcfa67e67289c0cc35155a64bf5e5152db
Reviewed-on: https://go-review.googlesource.com/6560Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

From main repo: https://go-review.googlesource.com/#/c/4940

Change-Id: I56fe7f6aedc0fd350abb94299ad500fcb80c049a
Reviewed-on: https://go-review.googlesource.com/8604Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Because ARM ABI requires 64-bit argument to be passed in even
register pairs, to avoid wasting one register between fd and
advise in the usual fadvise64 syscall signature, linux/arm
has its own variation that reorders the argument so that the
arguments fit in six registers.

While we're at it, also fix build for linux/386.

Fixes golang/go#10294.

Change-Id: I322e2226619c5aa9c096a1d5cb7ae1e94fd4a5a1
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8282Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The previous cherry-pick merge of fadvice from Gerrit added the
fadvise system calls, but from before the errno CL, which went in
concurrently.

Change-Id: I6f01e020bfe2930a8ea2fdbe4998ab9e2669ce14
Reviewed-on: https://go-review.googlesource.com/8199Reviewed-by: Rob Pike <r@golang.org>

Support includes 386, amd64, and arm for both Linux and FreeBSD.
FreeBSD changes courtesy Dave Chapeskie <dchapeskie@gmail.com>

Change-Id: I89dc18533d7178e74ae6c442a2e6272c9bd9692c
Reviewed-on: https://go-review.googlesource.com/8055Reviewed-by: Rob Pike <r@golang.org>

From main repo: https://go-review.googlesource.com/#/c/6701/3

Fixes golang/go#10266

Change-Id: I141fefe7f317edcea19b588b1569fa8772237f56
Reviewed-on: https://go-review.googlesource.com/8190Reviewed-by: Rob Pike <r@golang.org>

This avoids hanging when a Go program uses a FUSE filesystem and the
dup system call has to close a file descriptor.  When dup uses
RawSyscall then the goroutine calling dup will occupy a scheduler slot
(a p structure) during the call, and may block waiting for some other
goroutine to respond to the close call on the FUSE filesystem.
Changing to Syscall avoids the problem.  This makes Dup a tiny bit
slower but is quite unlikely to make a difference for any real
programs.

Update golang/go#10202.

Change-Id: I590c5c9a04e0a1281a85dc553c7592fa83949ac7
Reviewed-on: https://go-review.googlesource.com/8056Reviewed-by: Rob Pike <r@golang.org>

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>