45 lines
1.5 KiB
Markdown
45 lines
1.5 KiB
Markdown
# wasi-common
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This repo strips away those bits of [lucet-wasi](https://github.com/fastly/lucet/tree/master/lucet-wasi)
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which can potentially be encapsulated in a separated crate with potential plug'n'play use in both
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[Lucet](https://github.com/fastly/lucet)
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and [Wasmtime](https://github.com/CraneStation/wasmtime) projects.
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This repo is strictly experimental.
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## Supported syscalls
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We support a subset of the [WASI
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API](https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md), though we are adding
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new syscalls on a regular basis. We currently implement:
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- `__wasi_args_get`
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- `__wasi_args_sizes_get`
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- `__wasi_clock_res_get`
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- `__wasi_clock_time_get`
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- `__wasi_environ_get`
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- `__wasi_environ_sizes_get`
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- `__wasi_fd_close`
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- `__wasi_fd_fdstat_get`
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- `__wasi_fd_fdstat_set_flags`
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- `__wasi_fd_prestat_dir_name`
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- `__wasi_fd_prestat_get`
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- `__wasi_fd_read`
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- `__wasi_fd_seek`
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- `__wasi_fd_write`
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- `__wasi_path_open`
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- `__wasi_proc_exit`
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- `__wasi_random_get`
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This is enough to run basic C and Rust programs, including those that use command-line arguments,
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environment variables, stdio, and basic file operations.
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## Third-Party Code
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`src/wasm32.rs` is copied from
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[wasmtime](https://github.com/CraneStation/wasmtime/blob/master/wasmtime-wasi/src/wasm32.rs), along
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with the associated `LICENSE.wasmtime` file.
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Significant parts of our syscall implementations are derived from the C implementations in
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`cloudabi-utils`. See `LICENSE.cloudabi-utils` for license information.
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