Doing this because the slices functions are slightly faster and
slightly easier to use. It also removes one dependency layer.
This CL does not change packages that are used during bootstrap,
as the bootstrap compiler does not have the required slices functions.
It does not change the go/scanner package because the ErrorList
Len, Swap, and Less methods are part of the Go 1 API.
Change-Id: If52899be791c829198e11d2408727720b91ebe8a
Reviewed-on: https://go-review.googlesource.com/c/go/+/587655
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The path/filepath package needs to depend on the os package to
implement Abs, Walk, and other functions. Move the implementation
of purely lexical functions from path/filepath into
internal/filepathlite, so they can be used by os and
other low-level packages.
Change-Id: Id211e547d6f1f58c82419695ff2d75cd6cd14a12
Reviewed-on: https://go-review.googlesource.com/c/go/+/566556
Reviewed-by: Behroz Karimpor <behrozkarimpor201@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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The safefilepath package was originally added to contain
the FromFS function. We subsequently added FromFS to path/filepath
as Localize. The safefilepath package now exists only to permit
the os package to import Localize.
Rename safefilepath to filepathlite to better indicate that it's
a low-dependency version of filepath.
Change-Id: I4c5f9b28e8581f841947b48c5cac9954cd0c9535
Reviewed-on: https://go-review.googlesource.com/c/go/+/581517
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Change-Id: I020ca2ed8a6af60977f2c492cd742f824906d4ec
GitHub-Last-Rev: b27fda4630
GitHub-Pull-Request: golang/go#66462
Reviewed-on: https://go-review.googlesource.com/c/go/+/573715
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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This CL updates os.Readlink so it no longer tries to normalize volumes
to drive letters, which was not always even possible.
This behavior is controlled by the `winreadlinkvolume` setting.
For Go 1.23, it defaults to `winreadlinkvolume=1`.
Previous versions default to `winreadlinkvolume=0`.
Fixes#63703.
Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest,gotip-windows-arm64
Change-Id: Icd6fabbc8f0b78e23a82eef8db89940e89e9222d
Reviewed-on: https://go-review.googlesource.com/c/go/+/567735
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Reviewed-by: Bryan Mills <bcmills@google.com>
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This CL changes the behavior of os.Lstat to stop setting the
os.ModeSymlink type mode bit for mount points on Windows. As a result,
filepath.EvalSymlinks no longer evaluates mount points, which was the
cause of many inconsistencies and bugs.
Additionally, os.Lstat starts setting the os.ModeIrregular type mode bit
for all reparse tags on Windows, except for those that are explicitly
supported by the os package, which, since this CL, doesn't include mount
points. This helps to identify files that need special handling outside
of the os package.
This behavior is controlled by the `winsymlink` GODEBUG setting.
For Go 1.23, it defaults to `winsymlink=1`.
Previous versions default to `winsymlink=0`.
Fixes#39786Fixes#40176Fixes#61893
Updates #63703
Updates #40180
Updates #63429
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Change-Id: I2e7372ab8862f5062667d30db6958d972bce5407
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Add the Localize function, which takes an io/fs slash-separated path
and returns an operating system path.
Localize returns an error if the path cannot be represented on
the current platform.
Replace internal/safefile.FromFS with Localize,
which serves the same purpose as this function.
The internal/safefile package remains separate from path/filepath
to avoid a dependency cycle with the os package.
Fixes#57151
Change-Id: I75c88047ddea17808276761da07bf79172c4f6fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/531677
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TestAbs modifies the absTests global variable on Windows, which makes
the test to fail if it is run more than once, i.e. executing
"go test -run ^TestAbs$ -count 2 path/filepath".
This CL fixes the issue by clipping the absTests slices before
appending more elements to it.
Change-Id: I8f1144b2f10b8fa1b847e6639c0bda7baafc2dac
Reviewed-on: https://go-review.googlesource.com/c/go/+/566396
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Change-Id: I4ce88b2e8e8d24afb63ca7246ce0c418fcb02c9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/564715
Reviewed-by: Damien Neil <dneil@google.com>
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Also make the reference into a doc link.
Change-Id: Ib112307a65b65c8f963abf60aa92cb1942de940c
Reviewed-on: https://go-review.googlesource.com/c/go/+/554295
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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Change-Id: I6d40a59cde4c3f1d5094f5126fdbc1195285195f
Reviewed-on: https://go-review.googlesource.com/c/go/+/539577
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While fixing several bugs in path handling on Windows,
beginning with \\?\.
Prior to #540277, VolumeName considered the first path component
after the \\?\ prefix to be part of the volume name.
After, it considered only the \\? prefix to be the volume name.
Restore the previous behavior.
Fixes#64028
Change-Id: I6523789e61776342800bd607fb3f29d496257e68
Reviewed-on: https://go-review.googlesource.com/c/go/+/541175
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On Windows, A root local device path is a path which begins with
\\?\ or \??\. A root local device path accesses the DosDevices
object directory, and permits access to any file or device on the
system. For example \??\C:\foo is equivalent to common C:\foo.
The Clean, IsAbs, IsLocal, and VolumeName functions did not
recognize root local device paths beginning with \??\.
Clean could convert a rooted path such as \a\..\??\b into
the root local device path \??\b. It will now convert this
path into .\??\b.
IsAbs now correctly reports paths beginning with \??\
as absolute.
IsLocal now correctly reports paths beginning with \??\
as non-local.
VolumeName now reports the \??\ prefix as a volume name.
Join(`\`, `??`, `b`) could convert a seemingly innocent
sequence of path elements into the root local device path
\??\b. It will now convert this to \.\??\b.
In addition, the IsLocal function did not correctly
detect reserved names in some cases:
- reserved names followed by spaces, such as "COM1 ".
- "COM" or "LPT" followed by a superscript 1, 2, or 3.
IsLocal now correctly reports these names as non-local.
Fixes#63713
Fixes CVE-2023-45283
Fixes CVE-2023-45284
Change-Id: I446674a58977adfa54de7267d716ac23ab496c54
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2040691
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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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
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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
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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
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Fixes#52812
Change-Id: Idb70d0540bbf9ecdc64293c62a23f07ee3be883c
Reviewed-on: https://go-review.googlesource.com/c/go/+/405615
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Reviewed-by: Caleb Spare <cespare@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
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>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: David du Colombier <0intro@gmail.com>
[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>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
