06be4b1495
* Clean up fd_filestat_get implementation
This commit does 4 things:
* Adds `yanix::file::fstat`, a wrapper around `libc::fstat`.
* It essentially reverts 89fbde2 for Unix hosts -- in other words,
it brings back the use of `fstat` to obtain `libc::stat` from a
file descriptor, rather than relying on `std::fs::Metadata`. This
way, we reuse `host_impl::filestat_from_nix` in
`hostcalls_impl::fd_filestat_get` implementation rather than
unnecessarily duplicate code for converting filestats into
`__wasi_filestat_t`.
* Moves `crate::helpers::systemtime_to_timestamp` to Windows `host_impl`
module. It does the same thing with helpers which assist in converting
`std::fs::Metadata` into `__wasi_filestat_t`. This should retain symmetry
between *nix and Windows impls.
* Makes timestamp conversions in `host_impl::filestat_from_nix` fallible.
* Backport changes to snapshot0
* Signal no overflow with `from` rather than `as` cast
11 lines
321 B
Rust
11 lines
321 B
Rust
use crate::{Error, Result};
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use std::str;
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/// Creates not-owned WASI path from byte slice.
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///
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/// NB WASI spec requires bytes to be valid UTF-8. Otherwise,
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/// `__WASI_ERRNO_ILSEQ` error is returned.
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pub(crate) fn path_from_slice<'a>(s: &'a [u8]) -> Result<&'a str> {
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str::from_utf8(s).map_err(|_| Error::EILSEQ)
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}
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