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According to the POSIX standard, if connect() is interrupted by a
signal that is caught while blocked waiting to establish a connection,
connect() shall fail and set errno to EINTR, but the connection
request shall not be aborted, and the connection shall be established
asynchronously.
If asynchronous connection was successfully established after EINTR
and before the next connection attempt, OS returns EISCONN that was
handled as an error before. This behavior is fixed now and we handle
it as success.
The problem affects MacOS users: Linux doesn't return EISCONN in this
case, Windows connect() can not be interrupted without an old-fashoin
WSACancelBlockingCall function that is not used in the library.
So current solution gives connect() as OS specific implementation.
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Use std::io::Error::is_interrupted everywhere
In https://github.com/rust-lang/rust/pull/115228 I introduced this helper and started using it, this PR uses it to replace all applicable uses of `std::io::Error::kind`. The justification is the same; for whatever reason LLVM totally flops optimizing `Error::kind` so it's nice to use it less.
FYI ``@mkroening`` I swear the hermit changes look good, but I was so sure about the previous PR.
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This function does not exist as of hermit-sys 0.4.1 [1].
Once std does not call this function, we can remove it entirely.
[1]: https://github.com/hermitcore/hermit-rs/commit/e38f246e046c3ad50bd2f5e33d8d810d33891cbd#diff-a9b7fa816defab285f0d4fe69d4df4a0cbbcf1c89913000df3273aded949f257R10
Signed-off-by: Martin Kröning <martin.kroening@eonerc.rwth-aachen.de>
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In principle, this PR extends rust-lang/rust#108326 for RustyHermit.
Signed-off-by: Stefan Lankes <slankes@eonerc.rwth-aachen.de>
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By moving the IO traits, the RustyHermit support is harmonized to
of other operating systems.
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RustHermit publishs a new kernel interface and supports
a common BSD socket layer. By supporting this interface,
the implementation can be harmonized to other operating systems.
To realize this socket layer, the handling of file descriptors
is also harmonized to other operating systems.
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