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Peter Huene 8fdd776f81 Implement fd_fdstat_set_flags for Windows. 
This commit implements `fd_fdstat_set_flags` for Windows.

Additionally, it fixes a problem where `O_APPEND` was not working correctly
because `GENERIC_WRITE` was always being set; as a result, `FILE_WRITE_DATA`
could not be removed from the permission set to properly enable append-only
mode.

It also treats `O_TRUNC` with `O_APPEND` as an invalid argument error.  This is
because Windows cannot support these two flags together. To support `O_TRUNC`,
the `GENERIC_WRITE` bit must be set for the file access flags.  Setting this
bit will cause `FILE_WRITE_DATA` to be set, which will not properly treat the
file as append-only (it requires `FILE_APPEND_DATA` without `FILE_WRITE_DATA`).
2020-01-09 17:13:21 -08:00
..
src
Implement fd_fdstat_set_flags for Windows.
2020-01-09 17:13:21 -08:00
WASI @ 9150e66a34
wig: update to latest witx
2019-12-04 17:16:29 -08:00
wasi-common-cbindgen
Fix wasi-common-cbindgen missing no_mangle attr
2019-12-16 10:51:39 +01:00
wig
Reduce boilerplate in wasmtime-wasi (#707)
2019-12-16 16:37:20 -06:00
winx
Implement fd_fdstat_set_flags for Windows.
2020-01-09 17:13:21 -08:00
yanix
[wasi-common] Clean up fd_filestat_get implementation (#757)
2020-01-08 16:34:38 +01:00
Cargo.toml
Add yanix crate and replace nix with yanix in wasi-common (#649)
2019-12-08 16:40:05 -08:00
LICENSE
Initial reorg.
2019-11-08 06:35:40 -08:00
LICENSE.cloudabi-utils
Initial reorg.
2019-11-08 06:35:40 -08:00
README.md
Fix feature-gating of test-programs (#612)
2019-11-21 13:52:15 +01:00

README.md

wasi-common

A Bytecode Alliance project

A library providing a common implementation of WASI hostcalls for re-use in any WASI-enabled runtime.

Crates.io version Download docs.rs docs

The wasi-common crate will ultimately serve as a library providing a common implementation of WASI hostcalls for re-use in any WASI (and potentially non-WASI) runtimes such as Wasmtime and Lucet.

The library is an adaption of lucet-wasi crate from the Lucet project, and it is currently based on 40ae1df git revision.

Please note that the library requires Rust compiler version at least 1.37.0.

Supported syscalls

*nix

In our *nix implementation, we currently support the entire WASI API with the exception of socket hostcalls:

  • sock_recv
  • sock_send
  • sock_shutdown

We expect these to be implemented when network access is standardised.

We also currently do not support the proc_raise hostcall, as it is expected to be dropped entirely from WASI.

Windows

In our Windows implementation, we currently support the minimal subset of WASI API which allows for running the very basic "Hello world!" style WASM apps. More coming shortly, so stay tuned!

Development hints

When testing the crate, you may want to enable and run full wasm32 integration testsuite. This requires wasm32-wasi target installed which can be done as follows using rustup

rustup target add wasm32-wasi

Now, you should be able to run the integration testsuite by running cargo test on the test-programs package with test_programs feature enabled:

cargo test --features test_programs --package test-programs

Third-Party Code

Significant parts of our hostcall implementations are derived from the C implementations in cloudabi-utils. See LICENSE.cloudabi-utils for license information.