Use the new impl AsFd for &T support in io-lifetimes.
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With rust-lang/rust#93888 now in nightly, and sunfishcode/io-lifetimes#18 now in io-lifetimes 0.5.2, we can now simplify the `AsFd` pattern from `fn foo<Fd: AsFd>(fd: &Fd)` to `fn foo<Fd: AsFd>(fd: Fd)`, without the `&`. This also follows the emerging convention in std, as seen in the new [`fchown`] function. This means that users can now pass `BorrowedFd` values directly to functions that expect `AsFd` arguments, without having to write an extra `&` when passing them. [`fchown`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.fchown.html
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…is-terminal`. is-terminal is implemented in terms of rustix, so the code was previously just testing rustix against itself, and creating an awkward circluar dependency besides. Test against `libc::isatty` and `ioctl_tiocgwinsz` instead.
cgwalters
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Feb 17, 2022
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With rust-lang/rust#93888 now in nightly, and sunfishcode/io-lifetimes#18 now
in io-lifetimes 0.5.2, we can now simplify the
AsFdpattern fromfn foo<Fd: AsFd>(fd: &Fd)tofn foo<Fd: AsFd>(fd: Fd), without the&.This also follows the emerging convention in std, as seen in the new
fchownfunction.This means that users can now pass
BorrowedFdvalues directly tofunctions that expect
AsFdarguments, without having to write anextra
&when passing them.