While reading the source code, I noticed that readDir
seemed extremely similar to os.ReadDir. They indeed appear to be copies.
Note that there's readDirNames as well, but it has no corresponding
os.ReadDirNames top-level helper to be replaced by.
Change-Id: I6fe1d0aeda35dc69bb4531986fe3a21ebda1d877
Reviewed-on: https://go-review.googlesource.com/c/go/+/530795
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
While strings.LastIndex{,Byte} cannot be used in package path, the
respective internal/bytealg function can be used.
Change-Id: If0ecc36484308221f50875c8609913f6f2887fba
Reviewed-on: https://go-review.googlesource.com/c/go/+/527855
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
Fix a bug where Clean could improperly drop .. elements from a
path on Windows, when the path contains elements containing a ':'.
For example, Clean("a/../b:/../../c") now correctly returns "..\c"
rather than "c".
Fixes#61866
Change-Id: I97b0238953c183b2ce19ca89c14f26700008ea72
Reviewed-on: https://go-review.googlesource.com/c/go/+/517216
Run-TryBot: Damien Neil <dneil@google.com>
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Over the past few months as I read the standard library's documentation
I kept finding spots where godoc links would have helped me.
I kept adding to a stash of changes to fix them up bit by bit.
The stash has grown big enough by now, and we're nearing a release,
so I think it's time to merge to avoid git conflicts or bit rot.
Note that a few sentences are slightly reworded,
since "implements the Fooer interface" can just be "implements [Fooer]"
now that the link provides all the context needed to the user.
Change-Id: I01c31d3d3ff066d06aeb44f545f8dd0fb9a8d998
Reviewed-on: https://go-review.googlesource.com/c/go/+/508395
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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GOROOT/test is pruned out by cmd/distpack. It isn't really needed for
the test anyway; the test can instead use the "src/unicode" subdirectory,
which is even within the same module.
This test was previously adjusted in CL 13467045 and CL 31859.
Unlike in previous iterations of the test, the directories used in
this revision are covered by the Go 1 compatibility policy and thus
unlikely to disappear.
For #24904.
Change-Id: I156ae18354bcbc2ddd8d22b210f16ba1e97cd5d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/504116
Auto-Submit: Bryan Mills <bcmills@google.com>
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The new String methods use the new FormatFileInfo and
FormatDirEntry functions.
Fixes#54451
Change-Id: I414cdfc212ec3c316fb2734756d2117842a23631
Reviewed-on: https://go-review.googlesource.com/c/go/+/491175
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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The "double link with slash" test is skipped on darwin due to an
apparent kernel / libc bug. If the bug is present on other platforms
too, I'd like to know about it.
For #59586.
Change-Id: I4bdd6a80a3ed7b0960ea6da30f91a655f317d512
Reviewed-on: https://go-review.googlesource.com/c/go/+/484395
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Fixes#58141
Co-authored-by: Richard Musiol <neelance@gmail.com>
Co-authored-by: Achille Roussel <achille.roussel@gmail.com>
Co-authored-by: Julien Fabre <ju.pryz@gmail.com>
Co-authored-by: Evan Phoenix <evan@phx.io>
Change-Id: I49b66946acc90fdf09ed9223096bfec9a1e5b923
Reviewed-on: https://go-review.googlesource.com/c/go/+/479627
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
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I noticed the one in path/filepath while reading the docs,
and the other ones were found via some quick grepping.
Change-Id: I386f2f74ef816a6d18aa2f58ee6b64dbd0147c9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/478795
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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Do not permit Clean to convert a relative path into one starting
with a drive reference. This change causes Clean to insert a .
path element at the start of a path when the original path does not
start with a volume name, and the first path element would contain
a colon.
This may introduce a spurious but harmless . path element under
some circumstances. For example, Clean("a/../b:/../c") becomes `.\c`.
This reverts CL 401595, since the change here supersedes the one
in that CL.
Thanks to RyotaK (https://twitter.com/ryotkak) for reporting this issue.
Fixes#57274
Fixes CVE-2022-41722
Change-Id: I837446285a03aa74c79d7642720e01f354c2ca17
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1675249
Reviewed-by: Roland Shoemaker <bracewell@google.com>
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This also makes path/filepath.Walk more consistent between
Windows and POSIX platforms.
According to
https://pubs.opengroup.org/onlinepubs/9699919799.2013edition/basedefs/V1_chap04.html#tag_04_12
symlinks in a path that includes a trailing slash must be resolved
before a function acts on that path.
POSIX defines an lstat function, whereas the Win32 API does not, so
Go's os.Lstat should follow the (defined) POSIX semantics instead of
doing something arbitrarily different.
CL 134195 added a test for the correct POSIX behavior when os.Lstat is
called on a symlink. However, the test turned out to be broken on Windows,
and when it was fixed (in CL 143578) it was fixed with different Lstat
behavior on Windows than on all other platforms that support symlinks.
In #50807 we are attempting to provide consistent symlink behavior for
cmd/go. This unnecessary platform difference, if left uncorrected,
will make that fix much more difficult.
CL 460595 reworked the implementation of Stat and Lstat on Windows,
and with the new implementation this fix is straightforward.
For #50807.
Updates #27225.
Change-Id: Ia28821aa4aab6cefa021da2d9b803506cdb2621b
Reviewed-on: https://go-review.googlesource.com/c/go/+/463177
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EvalSymlinks calls Clean twice, one in walkSymlinks and another in
toNorm. The later is not necessary, as toNorm is only called by
EvalSymlinks and just after walkSymlinks cleans the path without any
path manipulation in between.
Change-Id: Ibdb782c7eed59468f0ebb913e98d2a7db0df010d
Reviewed-on: https://go-review.googlesource.com/c/go/+/454615
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For symlinks created from symlinks under the root directory created
as the relative path (e.g., symbolic links under /tmp), we update vol and volLen.
Fixes#57905
Change-Id: I45affd1db3b93109de51bf19b181f3cdba061109
Reviewed-on: https://go-review.googlesource.com/c/go/+/461761
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Historically, on Windows filepath.Join("c:", elt) does not insert
a path separator between "c:" and elt, but preserves leading slashes
in elt. Restore this behavior, which was inadvertently changed by
CL 444280.
Fixes#56988
Change-Id: Id728bf311f4093264f8c067d8b801ea9ebef5b5f
Reviewed-on: https://go-review.googlesource.com/c/go/+/453497
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Don't test IsLocal("nul.txt"), since whether this name is reserved
or not is version-dependent.
Change-Id: Ifff3edc77454e052080e325871c08bbba49e692c
Reviewed-on: https://go-review.googlesource.com/c/go/+/451222
Reviewed-by: Austin Clements <austin@google.com>
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IsLocal reports whether a path lexically refers to a location
contained within the directory in which it is evaluated.
It identifies paths that are absolute, escape a directory
with ".." elements, and (on Windows) paths that reference
reserved device names.
For #56219.
Change-Id: I35edfa3ce77b40b8e66f1fc8e0ff73cfd06f2313
Reviewed-on: https://go-review.googlesource.com/c/go/+/449239
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Reviewed-by: Joedian Reid <joedian@golang.org>
This reverts commit d154ef60a0.
This change made IsAbs return true for certain reserved filenames,
but does not consistently detect reserved names. For example,
"./COM1", "//./COM1", and (on some Windows versions) "COM1.txt"
all refer to the COM1 device, but IsAbs detects none of them.
Since NUL is not an absolute path, do not attempt to detect it
or other device paths in IsAbs. See #56217 for more discussion
of IsAbs and device paths.
For #56217.
Change-Id: If4bf81c7e1a2e8842206c7c5268555102140dae8
Reviewed-on: https://go-review.googlesource.com/c/go/+/448898
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Previously, the volumeNameLen function checked for UNC paths starting
with two slashes, a non-'.' character, and another slash. This misses
volume names such as "\\.\C:\".
The previous check for volume names rejects paths beginning
with "\\.". This is incorrect, because while these names are not
UNC paths, "\\.\C:\" is a DOS device path prefix indicating the
C: device. It also misses UNC path prefixes in the form
"\\.\UNC\server\share\".
The previous check for UNC paths also rejects any path with an
empty or missing host or share component. This leads to a number
of possibly-incorrect behaviors, such as Clean(`\\a`) returning `\a`.
Converting the semantically-significant `\\` prefix to a single `\`
seems wrong.
Consistently treat paths beginning with two separators as having
a volume prefix.
Update VolumeName to detect DOS device paths (`\\.\` or `\\?\`),
DOS device paths linking to UNC paths (`\\.\UNC\Server\Share`
or `\\?\UNC\Server\Share`), and UNC paths (`\\Server\Share\`).
Clean(`\\a`) = `\\a`
Join(`\\`, `a`, `b`) = `\\a\b`
In addition, normalize path separators in VolumeName for consistency
with other functions which Clean their result.
Fixes#56336
Change-Id: Id01c33029585bfffc313dcf0ad42ff6ac7ce42fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/444280
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Reviewed-by: Roland Shoemaker <roland@golang.org>
A linear search through a list of 22 strings takes ~80ns.
A quick check for 3-4 byte strings reduces this check to 2ns
for a vast majority of inputs.
In the event of a name match, the new logic is either just
as fast (for "CON") or 10x faster (for "LPT9").
Change-Id: I412fa73beebd7c81dc95f9ed12c35ca1d5d6baf0
Reviewed-on: https://go-review.googlesource.com/c/go/+/433175
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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Fixes#52812
Change-Id: Idb70d0540bbf9ecdc64293c62a23f07ee3be883c
Reviewed-on: https://go-review.googlesource.com/c/go/+/405615
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Caleb Spare <cespare@gmail.com>
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A limit is added to the number of path separators allowed by an input to
Glob, to prevent stack exhaustion issues.
Thanks to Juho Nurminen of Mattermost who reported the issue.
Fixes CVE-2022-30632
Fixes#53416
Change-Id: I1b9fd4faa85411a05dbc91dceae1c0c8eb021f07
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1498176
Reviewed-by: Roland Shoemaker <bracewell@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/417066
Reviewed-by: Heschi Kreinick <heschi@google.com>
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Fixes#52476
Change-Id: I9eb72ac7dbccd6322d060291f31831dc389eb9bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/401595
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Plan 9 doesn't have symbolic links, so EvalSymlinks can be simplified
just to check validity of the path and call Clean. This saves a lot
of redundant file system activity.
Updates #50775
Change-Id: I84c24ef1d5e6e38fd19df2d37c72fbf883f0140d
Reviewed-on: https://go-review.googlesource.com/c/go/+/404954
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[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]
Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.
For #51082.
Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
go/doc in all its forms applies this replacement when rendering
the comments. We are considering formatting doc comments,
including doing this replacement as part of the formatting.
Apply it to our source files ahead of time.
For #51082.
Change-Id: Ifcc1f5861abb57c5d14e7d8c2102dfb31b7a3a19
Reviewed-on: https://go-review.googlesource.com/c/go/+/384262
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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A future change to gofmt will rewrite
// Doc comment.
//
func f()
to
// Doc comment.
func f()
Apply that change preemptively to all doc comments.
For #51082.
Change-Id: I4023e16cfb0729b64a8590f071cd92f17343081d
Reviewed-on: https://go-review.googlesource.com/c/go/+/384259
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This fixes many (but not all) of the tests that currently fail
(due to a bogus path reported by runtime.GOROOT) when run with
'go test -trimpath std cmd'.
Updates #51461
Change-Id: Ia2cc05705529c4859e7928f32eeceed647f2e986
Reviewed-on: https://go-review.googlesource.com/c/go/+/391806
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When these packages are released as part of Go 1.18,
Go 1.16 will no longer be supported, so we can remove
the +build tags in these files.
Ran go fix -fix=buildtag std cmd and then reverted the bootstrapDirs
as defined in src/cmd/dist/buildtool.go, which need to continue
to build with Go 1.4 for now.
Also reverted src/vendor and src/cmd/vendor, which will need
to be updated in their own repos first.
Manual changes in runtime/pprof/mprof_test.go to adjust line numbers.
For #41184.
Change-Id: Ic0f93f7091295b6abc76ed5cd6e6746e1280861e
Reviewed-on: https://go-review.googlesource.com/c/go/+/344955
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On darwin, under load, it appears that the system occasionally
deletes the temp dir mid-test. Don't fail the test when that happens.
It would be nice to fix this in a deeper way.
See golang.org/cl/332009 for some discussion.
In the meantime, this will at least stop the flakiness.
Updates #37910
Change-Id: I6669e466fed9abda4a87ca88345c04cd7986b41e
Reviewed-on: https://go-review.googlesource.com/c/go/+/332009
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Add the tempDirCanonical function, for tests that need a temporary
directory that does not contain symlinks.
Updates #45402
Change-Id: I3d08ef32ef911331544acce3d7d013b4c3382960
Reviewed-on: https://go-review.googlesource.com/c/go/+/308011
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Change-Id: I6d78e0e742cb0e7f5ea3f430e9cec0f5d1ee03e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/307652
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Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).
Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild
Change-Id: Ia0534360e4957e58cd9a18429c39d0e32a6addb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/294430
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As part of #42026, these helpers from io/ioutil were moved to os.
(ioutil.TempFile and TempDir became os.CreateTemp and MkdirTemp.)
Update the Go tree to use the preferred names.
As usual, code compiled with the Go 1.4 bootstrap toolchain
and code vendored from other sources is excluded.
ReadDir changes are in a separate CL, because they are not a
simple search and replace.
For #42026.
Change-Id: If318df0216d57e95ea0c4093b89f65e5b0ababb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266365
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This commit is a copy of filepath.WalkDir adapted to use fs.FS
instead of the native OS file system. It is the last implementation
piece of the io/fs proposal.
The original io/fs proposal was to adopt filepath.Walk, but we
have since introduced the more efficient filepath.WalkDir (#42027),
so this CL adopts that more efficient option instead.
(The changes in path/filepath bring the two copies more in line
with each other. The main change is unembedding the field
in statDirEntry, so that the fs.DirEntry passed to the WalkDirFunc
for the root of the tree does not have any extra methods.)
For #41190.
Change-Id: I9359dfcc110338c0ec64535f22cafb38d0b613a6
Reviewed-on: https://go-review.googlesource.com/c/go/+/243916
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WalkDir is like Walk but can use ReadDir to read directories,
instead of Readdirnames + Lstat on every entry,
which is usually a significant performance improvement.
(The Lstat can still happen if the walk function calls d.Info.)
Fixes#42027.
[Replay of CL 266240 after it was reverted due to accidentally
enabling on Windows a test that does not work on Windows.
The original code only ran the test on os.Getuid() > 0.
The rolled-back CL skipped the test on os.Getuid() == 0.
But on Windows, os.Getuid(), it turns out, always returns -1.
So what looked like a test for root was also excluding Windows.
This CL revises the test to skip Windows explicitly.]
Change-Id: I9b3661013d6449b7486532445d934ae91e5393ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/267887
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
This reverts CL 266240.
Reason for revert: tests aren't passing on windows-amd64-longtest.
Change-Id: If323c6254a42aff0418e2c0a9531f3d4c829a242
Reviewed-on: https://go-review.googlesource.com/c/go/+/267798
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
WalkDir is like Walk but can use ReadDir to read directories,
instead of Readdirnames + Lstat on every entry,
which is usually a significant performance improvement.
(The Lstat can still happen if the walk function calls d.Info.)
Fixes#42027.
Change-Id: Ie11024b23be2656e320d41fd81ff0d8810aa729e
Reviewed-on: https://go-review.googlesource.com/c/go/+/266240
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Fixes#42079
Previously, EvalSymlinks returned an error when called with the root of
a UNC share (e.g. \\server\share). This was due to Windows's
FindFirstFile function not supporting a share root path.
To resolve this, now return early from toNorm in the case where the path
after the volume name is empty. Skipping the later path component
resolution shouldn't have any negative impact in this case, as if the
path is empty, there aren't any path components to resolve anyways.
The test case uses the localhost admin share (c$), as it should be
present in most situations. This allows testing without setting up an
external file share. However, this fix applies to all UNC share root
paths.
Change-Id: I05035bd86be93662d7bea34fab4b75fc8e918206
GitHub-Last-Rev: bd3db2cda6
GitHub-Pull-Request: golang/go#42096
Reviewed-on: https://go-review.googlesource.com/c/go/+/263917
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Giovanni Bajo <rasky@develer.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>