Commit Graph

41 Commits

Author SHA1 Message Date
Tobias Klauser
abf886d6f5 unix: unify definition of func fcntl
For linux and *bsd, implement func fcntl in fcntl.go instead of
generating it. Implement it using fcntl64Syscall, so SYS_FCNTL64 is used
on 32-bit linux.

For aix, darwin and solaris continue generate func fcntl as before.

Change-Id: I3750b88d1ee5573daaee2b75c369f723fde8834a
Reviewed-on: https://go-review.googlesource.com/c/sys/+/212337
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-12-23 22:40:30 +00:00
Jason A. Donenfeld
f89234f9a2 unix: __sysctl is sysctl on darwin
While the other BSDs use __sysctl as the name, Darwin now uses sysctl,
without the leading underscores, and considers __sysctl to be "private".
Using __sysctl leads to App Store rejections, and Go's syscall package
already uses the proper syscall. So this commit changes Darwin's syscall
to use it too here, while reverting a recent commit that removed it all
together on arm and arm64.

This reverts CL 194097.

Fixes golang/go#35103
Updates golang/go#34133
Updates golang/go#35101

Change-Id: Ic72d5e7a435b99fe62c533b77b2c3790590f4c9e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/202837
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-10-23 15:13:26 +00:00
Tobias Klauser
2aa67d56cd unix: fix Select to return number of ready fds on Darwin and *BSD
Make Select's signature on Darwin and the BSDs match the one on Linux
and return the number of ready file descriptors.

Fixes golang/go#34458

Change-Id: Ia618ce34ff754f2b731d7f913cab840d7948579c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/196802
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-24 06:27:00 +00:00
Elias Naur
d223b2b6db unix: disable sysctl on iOS
Running the regenerating scripts also brought in ClockGettime.

Updates golang/go#34133

Change-Id: I0eb9ed6dbbc2bdd7e3d2a7f5d88492e9dfed0ada
Reviewed-on: https://go-review.googlesource.com/c/sys/+/194097
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-09-07 18:44:12 +00:00
Kir Kolyshkin
08d80c9d36 unix: unify Ioctl* functions
Unify Ioctl* functions common across the different UNIX OSs.

Change-Id: I2376d97a7162e7e6518f75faf9317ffc87962411
Reviewed-on: https://go-review.googlesource.com/c/sys/+/192358
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-08-30 08:01:33 +00:00
Tobias Klauser
e07cf5db27 unix: don't use syscall.ParseDirent
Implement ParseDirent in x/sys/unix instead of calling
syscall.ParseDirent. The latter uses offsets into syscall.Dirent which
might not be matching unix.Dirent depending on Go version. This is e.g.
the case with of FreeBSD whose Dirent structure was updated for Go 1.12.

This fixes TestDirent and TestGetdirentries on freebsd with Go 1.11

Reverts CL 88475

Change-Id: I04318f59c6fbf148c75ce3667255a0c0428288e2
Reviewed-on: https://go-review.googlesource.com/c/sys/+/183897
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
2019-06-26 15:08:13 +00:00
Yuval Pavel Zholkover
a26fa11ef6 unix: fix Getdirentries emulation using Getdents on netbsd, openbsd
CL 182319 used the wrong shift offset, correct and enable the TestGetdirentries.

Change-Id: I45d8d420a071fd79fa1b37642b984d80943f492b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/183221
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-06-21 18:44:11 +00:00
Yuval Pavel Zholkover
15dcb6c006 unix: fix Getdirentries emulation using Getdents on netbsd, openbsd
Call Seek if basep is not nil to read the current dir offset.
Return EIO error if the offset doesn't fit into a 32-bit uintptr.
Make Getdents public.

Update golang/go#32498

Change-Id: Idfbc48d3fc3a6cc8a979242681e8882d39998285
Reviewed-on: https://go-review.googlesource.com/c/sys/+/182319
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-06-16 12:48:12 +00:00
Tobias Klauser
6c81ef8f67 unix: add SysctlClockinfo on OpenBSD
OpenBSD (like NetBSD) uses sysctl with struct clockinfo to get clock
rate information from the kernel. Add type Clockinfo and the
SysctlClockinfo function to query this information.

Change-Id: I35070a82b8de23dcd7592e8654dcc5eeee143b5b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/168057
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
2019-03-18 19:57:19 +00:00
Keith Randall
7c4c994c65 unix: remove raw syscall from Sendfile
Update golang/go#17490

Change-Id: Iaec54b8ffda1a24d4c8b5671185d570fb8683155
Reviewed-on: https://go-review.googlesource.com/c/154663
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-12-20 18:20:59 +00:00
Tobias Klauser
c8e336422f unix: add remaining *at functions on openbsd
Add Fchownat, Linkat, Mkdirat, Mkfifoat, Mknodat, Renameat, Symlinkat
and Unlinkat.

Change-Id: I023214f3b65e3b7d620fa7e1ce12f1c35a765cd9
Reviewed-on: https://go-review.googlesource.com/c/145817
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-10-30 13:39:55 +00:00
Tobias Klauser
d69651ed34 unix: add Readlinkat on openbsd
Change-Id: I1069c327a5ce01ca2bfa37a889d3c6fd72b7859d
Reviewed-on: https://go-review.googlesource.com/c/145517
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-10-29 17:45:26 +00:00
Tobias Klauser
22bddfe262 unix: add Openat on openbsd
Change-Id: I0c9d97d7db72e74cfd5d7ba77c46726ec38b821b
Reviewed-on: https://go-review.googlesource.com/c/144172
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-10-24 14:55:22 +00:00
Tobias Klauser
44b849a8bc unix: add Ppoll on openbsd
Change-Id: I3a13730e219e6f6df28829cf0d1e193c62073ac8
Reviewed-on: https://go-review.googlesource.com/c/144057
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-10-23 15:21:57 +00:00
Tobias Klauser
679a27dec1 unix: add SysctlUvmexp on OpenBSD
OpenBSD uses sysctl with struct uvmexp to get information from the
virtual memory system of the kernel. Add type Uvmexp and the
SysctlUvmexp function to query this information.

This will be used in github.com/tklauser/go-sysconf to get
_SC_AVPHYS_PAGES on OpenBSD.

Change-Id: I96ded2d1be37e5307bab55e79b13234cc93d21e6
Reviewed-on: https://go-review.googlesource.com/c/139278
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-10-03 14:57:07 +00:00
Brad Fitzpatrick
e072cadbbd unix: document IoctlSetWinsize and IoctlSetTermios and fix pointer lifetime
Change-Id: I42e59149e58bd928d9beb2c6665ce186b377d2a1
Reviewed-on: https://go-review.googlesource.com/125640
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-07-24 21:28:12 +00:00
Tobias Klauser
f4b713d596 unix: add Faccessat on OpenBSD
Change-Id: I4e3101b4689e8e94fbae6634975d10c8bb6b8a31
Reviewed-on: https://go-review.googlesource.com/118616
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-06-13 14:36:30 +00:00
Ivan Markin
ecfd8b563e unix: implement getrtable/setrtable syscalls on OpenBSD
Change-Id: I9f0ca3c2c1cd79f0c996ebbc7f79a42f740e0d2c
GitHub-Last-Rev: ebd0046a4f
GitHub-Pull-Request: golang/sys#10
Reviewed-on: https://go-review.googlesource.com/107302
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-04-16 21:11:45 +00:00
Tobias Klauser
f8f1a95d4d unix: add Fchmodat on OpenBSD
Change-Id: If7868a3d43eed266496db8a0e2af908de77362eb
Reviewed-on: https://go-review.googlesource.com/101576
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-20 09:40:49 +00:00
Tobias Klauser
5c2edb58fd unix: add Fstatat on OpenBSD
Also enable TestFstatat for all Unices now that they all implement
Fstatat.

Change-Id: I9722437042d5fc0df4a27d3a6a2be3d124c60057
Reviewed-on: https://go-review.googlesource.com/100617
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-15 07:57:55 +00:00
Tobias Klauser
0346725895 unix: add godoc for Sockaddr* types
Add rudimentary godoc for all existing Sockaddr* types implementing the
Sockaddr interface.

Change-Id: Ida7d1e8756477b54fc773f4bc978002c3d4a376d
Reviewed-on: https://go-review.googlesource.com/89775
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-01-25 14:53:36 +00:00
Tobias Klauser
af50095a40 unix: use ParseDirent from syscall
Just call syscall's implementation instead of duplicating ParseDirent
and the GOOS-specific private functions needed by it.

Change-Id: Icf49769390929463323608e093dd2a3d1c0ae4d3
Reviewed-on: https://go-review.googlesource.com/88475
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-01-22 08:19:59 +00:00
Tobias Klauser
1d2aa6dbde unix: add Getcwd to support Getwd on all BSDs
All BSDs provide the SYS___GETCWD syscall which can be used to implement
Getwd.

Also add a test based on TestChdirAndGetwd from os/os_test.go

Change-Id: I243eae3e02a40e92afad317eb1f8a28b6032c131
Reviewed-on: https://go-review.googlesource.com/83755
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-12-14 07:29:55 +00:00
Tobias Klauser
19b530ce1b unix: add Uname on openbsd
Change-Id: I40f99aab912c7002d113f82ccc60c9f68b9bc496
Reviewed-on: https://go-review.googlesource.com/82855
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-12-08 14:40:20 +00:00
Tobias Klauser
bf42f188b9 unix: use sort.Search for sysctl lookup on OpenBSD
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-11-14 16:20:44 +00:00
Tobias Klauser
75813c6472 unix: remove empty lines before first comment in block
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-11-07 16:15:30 +00:00
Tobias Klauser
eae8a563e8 unix: add ioctl functions on OpenBSD
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-11-06 15:24:42 +00:00
Tobias Klauser
46eaec7899 unix: use setattrlist for UtimesNanoAt on Darwin
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-11-02 21:26:49 +00:00
Tobias Klauser
feaf45c67f unix: use setattrlist for UtimesNano on Darwin for ns resolution
Follow CL 74952 for x/sys/unix.

Update golang/go#22528

Change-Id: Id146da75b80a64cfa4eac28e9bb7b3befe944718
Reviewed-on: https://go-review.googlesource.com/75610
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-11-02 20:14:56 +00:00
Tobias Klauser
af4555b109 unix: move Poll implementation for BSDs into syscall_bsd.go
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-10-31 08:18:28 +00:00
Tobias Klauser
b98136db33 unix: add Poll function on OpenBSD
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
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-10-27 13:59:02 +00:00
Tobias Klauser
43e60d72a8 unix: unify memory functions on BSD
Make Madvice, Mlock, Mlockall, Mprotect, Msync, Munlock and Munlockall
available equally on all BSD flavors. NetBSD was previously lacking
SYS_MSYNC, so add it.

Reorder the //sys function prototype alphabetically and clean up already
implemented syscalls everywhere.

Also add tests for Mprotect, Msync and Madvice - now that they're
available on all unix platforms.

Fixes golang/go#18513

Change-Id: I0eb502d72c7e991f191fb96225ef04e8297d8b8d
Reviewed-on: https://go-review.googlesource.com/56172
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-08-17 23:46:08 +00:00
Tobias Klauser
2d3e384235 unix: add utimensat and use it for UtimesNano on BSD
Follow golang.org/cl/55130 and add the utimensat syscall on *BSD. Use it
in UtimesNano and UtimesNanoAt (which is added on *BSD, akin to the
already existing implementation on Linux and Solaris).

Also add AT_FDCWD and AT_SYMLINK_NOFOLLOW where they are missing. These
might be used with UtimesNanoAt.

In order to be able to generate the syscalls, also add two missing
$GOOS_$GOARCH patterns to mkall.sh. As a side effect, some additional
syscalls are added for openbsd/arm.

Change-Id: I85351098002209f8454ec328cef0cfe9d12c5214
Reviewed-on: https://go-review.googlesource.com/55071
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-08-14 19:17:52 +00:00
Koki Ide
9a7256cb28 unix: validate ParseDirent inputs
This is a copy of https://golang.org/cl/23780 for the x/sys repo.

Don't panic, crash, or return references to uninitialized memory when 
ParseDirent is passed invalid input.

Updates golang/go#15653
Fixes golang/go#19754

Change-Id: Idb7cffe14d48ed662e5a55ecb5249c1907cf4003
Reviewed-on: https://go-review.googlesource.com/38758
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-03-29 06:16:34 +00:00
Sameer Ajmani
aaabbdc969 x/sys/unix: remove the "use" function and its calls.
Update mksyscall*.pl to skip generating calls to "use".
Make build tag handling match what's used in the syscall package.

See issue https://golang.org/issue/16607
and CL https://golang.org/cl/36616

Change-Id: I2d2e823fe1846d2110c07eb1bf976852706ecf60
Reviewed-on: https://go-review.googlesource.com/36715
Run-TryBot: Sameer Ajmani <sameer@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-02-10 16:30:38 +00:00
Mikio Hara
a408501be4 unix: fix missing use of use function in Getfsstat and Getwd
Updates golang/go#13372.

Change-Id: I623de97eb19880356148cbcb7d17759df82684aa
Reviewed-on: https://go-review.googlesource.com/24751
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-07-04 03:17:55 +00:00
Ian Lance Taylor
5829c74886 unix: change Dup,Dup2,Dup3 to use Syscall, not RawSyscall
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/8056
Reviewed-by: Rob Pike <r@golang.org>
2015-03-26 17:59:35 +00:00
William Orr
853bdd547a unix: add mlock/munlock/mlockall/munlockall/mprotect to *BSD
Change-Id: I01c5dd902bbc349b860600ec2b3d556e2dc406c9
Reviewed-on: https://go-review.googlesource.com/1921
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-01-06 02:05:08 +00:00
Rob Pike
dc3c21c62b go.sys/unix: use syscall.Errno for errors
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
2014-08-15 09:57:24 -07:00
Rob Pike
8442dd2c63 go.sys: update package names
Semi-automatic migration from package syscall to package {plan9,windows,unix}.
No builds attempted yet, but this gets a lot of noise behind us so subsequent
CLs will be more concise and easier to follow.
Subsequent CLs will have semantic content.

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/121520043
2014-08-11 15:58:26 -07:00
Rob Pike
20acc5cf31 go.sys: copy files from syscall package to go.sys/{plan9,windows,unix}
This CL copies to each package of go.sys the files from syscall it will need.
Different directories have different files, but these:
        mkall.sh
        str.go
        syscall.go
        mksyscall.pl
        race.go
        race0.go
        syscall_test.go
are copied to all three.
No changes yet, these are just copies. They are not ready to use yet:
package names are wrong, for starters. But this clean copy will make
it easier to follow the changes as the packages are enabled.

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/126960043
2014-08-11 14:48:46 -07:00