Calling syscall.ReadFile and syscall.WriteFile on overlapped handles
always need to be passed a valid *syscall.Overlapped structure, even if
the handle is not added to a IOCP (like the Go runtime poller). Else,
the syscall will fail with ERROR_INVALID_PARAMETER.
We also need to handle ERROR_IO_PENDING errors when the overlapped
handle is not added to the poller, in which case we need to block until
the operation completes.
Previous CLs already added support for overlapped handles to the poller,
mostly to keep track of the file offset independently of the file
pointer (which is not supported for overlapped handles).
Fixed#15388.
Updates #19098.
Change-Id: I2103ab892a37d0e326752ae8c2771a43c13ba42e
Reviewed-on: https://go-review.googlesource.com/c/go/+/661795
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
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Reviewed-by: Damien Neil <dneil@google.com>
For #67002
Change-Id: I223f3f2dbc8b02726f4ce5a017c628c4a20f109a
Reviewed-on: https://go-review.googlesource.com/c/go/+/659757
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
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For #67002
Change-Id: Ifb1042bc5ceaeea64296763319b24634bbcb0bf0
Reviewed-on: https://go-review.googlesource.com/c/go/+/659416
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For #67002
Change-Id: I532a5ffc02c7457796540db54fa2f5ddad86e4b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/658995
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For #67002
Change-Id: I1bbf18838a1dd2281a2b6e56fc8a58ef70007adc
Reviewed-on: https://go-review.googlesource.com/c/go/+/649536
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For #67002
Change-Id: I9b10ac30f852052c85d6d21eb1752a9de5474346
Reviewed-on: https://go-review.googlesource.com/c/go/+/649515
Auto-Submit: Damien Neil <dneil@google.com>
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For #67002
Change-Id: I546537618cbe32217fa72264d49db2b1a1d3b6db
Reviewed-on: https://go-review.googlesource.com/c/go/+/648295
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For #67002
Change-Id: Id6c3a2096bd10f5f5f6921a0441dc6d9e6cdeb3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/645718
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Added implementations for *io/fs.subFS, os.DirFS, and testing/fstest.MapFS.
Amended testing/fstest.TestFS to check behavior.
Addressed TODOs in archive/tar and os.CopyFS around symbolic links.
I am deliberately not changing archive/zip in this CL,
since it currently does not resolve symlinks
as part of its filesystem implementation.
I am unsure of the compatibility restrictions on doing so,
so figured it would be better to address independently.
testing/fstest.MapFS now includes resolution of symlinks,
with MapFile.Data storing the symlink data.
The behavior change there seemed less intrusive,
especially given its intended usage in tests,
and it is especially helpful in testing the io/fs function implementations.
Fixes#49580
Change-Id: I58ec6915e8cc97341cdbfd9c24c67d1b60139447
Reviewed-on: https://go-review.googlesource.com/c/go/+/385534
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Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Funda Secgin <fundasecgin33@gmail.com>
The release note fragments have been merged and added
as _content/doc/go1.24.md in x/website in CL 634056.
For #68545.
Change-Id: I7b3840df01b8c3699681c0cd21a16af70f74d31d
Reviewed-on: https://go-review.googlesource.com/c/go/+/634057
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
Add os.Root, a type which represents a directory and permits performing
file operations within that directory.
For #67002
Change-Id: I863f4f1bc320a89b1125ae4237761f3e9320a901
Reviewed-on: https://go-review.googlesource.com/c/go/+/612136
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Built-in service user accounts should be treated as special cases
of well-known groups and allowed in user.Lookup and user.LookupId.
Namely, these accounts are:
- NT AUTHORITY\SYSTEM (S-1-5-18)
- NT AUTHORITY\LOCAL SERVICE (S-1-5-19)
- NT AUTHORITY\NETWORK SERVICE (S-1-5-20)
See https://learn.microsoft.com/en-us/windows/win32/services/service-user-accounts.
Note that #49509 also mentions S-1-5-17 (NT AUTHORITY\IUSR) as
another well-known group that should be treated as a user. I haven't
found any documentation supporting this claim, and it is not an account
that is used usually, so I'm not adding it for now.
This CL is heavily based on CL 452497.
Fixes#49509
Change-Id: I6e204ddfb4ed0c01b4503001cf284602531e4a88
Reviewed-on: https://go-review.googlesource.com/c/go/+/626255
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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The release note fragments have been merged and added
as _content/doc/go1.23.md in x/website in CL 594035.
For #65614.
Change-Id: I7c8c718bc065024b6bdca93ce9bcc3c5d8b2dbc7
Reviewed-on: https://go-review.googlesource.com/c/go/+/594036
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Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
This is a practical use of CL 577915, follow-up to CL 577835.
Change-Id: Ibe7e2fa11b444afa1898dc6f6aba1512fe98f1fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/578195
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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63703.md contains a paragraph that shouldn't be there,
remove it.
While here, fix a test error message related to the #63703
implementation.
Updates #63703.
Change-Id: I82a8b0b7dfa8f96530fb9a3a3aa971e03970f168
Reviewed-on: https://go-review.googlesource.com/c/go/+/569195
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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.
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Change-Id: Icd6fabbc8f0b78e23a82eef8db89940e89e9222d
Reviewed-on: https://go-review.googlesource.com/c/go/+/567735
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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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Fixes#62484
Change-Id: I5d8950dedf86af48f42a641940b34e62aa2cddcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/558995
Auto-Submit: Ian Lance Taylor <iant@google.com>
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