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Jakub Konka c98b3d10ec Fix fd_readdir on BSD-style nixes (#81 )

* Fix fd_readdir on BSD-style nixes

The fix was tested on Darwin-XNU and FreeBSD. The change introduces
thread-safe cache of (RawFd, *mut libc::DIR) pairs so that
libc::fdopendir syscall is called only once when invoking fd_readdir
for the first time, and then the pointer to the directory stream,
*mut libc::DIR, is reused until the matching raw file descriptor
is closed.

This fix allows then correct use (and matching to the implementation
on Linux kernels) of libc::seekdir and libc::rewinddir to seek through
and rewind the existing directory stream, *mut libc::DIR, which
otherwise seems to be reset/invalidated every time libc::fdopendir
is called (unlike on Linux, where this behaviour is not observed).

* Store dir stream as part of the FdEntry's Descriptor

* Move bsd specifics into separate module

* Add todo comments and fix formatting

* Refactor int conversions

* Emphasise in debug logs that we're looking at fd_readdir entry

* Change visibility of FdEntry and related to public-private

* Rewrite creating DirStream for the first time

2019-09-14 21:01:39 +02:00

misc_testsuite @ a8b2291b47

Add fd_advise smoke test

2019-09-13 12:19:34 +02:00

src

Fix fd_readdir on BSD-style nixes (#81 )

2019-09-14 21:01:39 +02:00

tests

Fix linter warnings

2019-08-14 12:59:00 +02:00

wasi-common-cbindgen

Update to syn 1 and quote 1.

2019-09-09 16:33:32 +02:00

winx

Add #![cfg(windows)] to allow publishing from non-Windows hosts.

2019-08-21 00:04:00 -07:00

.azure-pipelines.yml

Check out submodules in Azure

2019-08-23 20:36:11 -07:00

.gitignore

Add .vscode to .gitignore

2019-09-06 20:38:50 -07:00

.gitmodules

Check out submodules in Azure

2019-08-23 20:36:11 -07:00

.rustfmt.toml

Set up CI, add format and test scripts.

2019-05-08 07:39:54 +02:00

build.rs

Fix fd_readdir on BSD-style nixes (#81 )

2019-09-14 21:01:39 +02:00

Cargo.toml

Check if testsuite exists, set target dir

2019-08-23 20:36:11 -07:00

clippy.toml

Set up CI, add format and test scripts.

2019-05-08 07:39:54 +02:00

CODE_OF_CONDUCT.md

Add contributing guide and code of conduct

2019-05-09 19:02:32 +02:00

CONTRIBUTING.md

Add contributing guide and code of conduct

2019-05-09 19:02:32 +02:00

LICENSE

Extract common interface from lucet-wasi

2019-05-04 18:20:21 +02:00

LICENSE.cloudabi-utils

Eliminate whitespace diffs with upstream LICENSE files.

2019-05-07 09:01:57 +02:00

README.md

Update CI status in README

2019-08-02 11:54:16 +02:00

README.md

wasi-common

This repo 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 1.36.0.

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!

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.