[release/6.0] Fallback to read/write if pread/pwrite fails#60280

Merged

Anipik merged 13 commits intorelease/6.0from

backport/pr-59846-to-release/6.0

Oct 12, 2021

Commits on Oct 12, 2021

Fallback to read/write if pread/pwrite fails

David Cantu
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* Cache whether a handle supports random access * Keep avoiding pread/pwrite for unseekable files * Fallback to read/write only for known error ENXIO

David Cantu
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Test more device paths and add tests for WriteAll*

David Cantu
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Fix CI: skip test when device can't be opened

David Cantu
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* Do not use SkipTestException * Exclude EBADF from assertion

David Cantu
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use NullableBool in _supportsRandomAccess

jozkee
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Add tests for mkfifo and socketpair

jozkee
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Rename test file

jozkee
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Address feedback in src

jozkee
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Address suggestions

jozkee
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Address suggestions

jozkee
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Update src/libraries/System.IO.FileSystem/tests/FileStream/DevicesPipesAndSockets.cs

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Use IEnumerable<string> in Lazy and fix usages

jozkee
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