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Document the preopened file descriptor range.

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Dan Gohman
2019-04-09 12:53:20 -07:00
parent d722b354db
commit a99107203e
1 changed files with 4 additions and 1 deletions
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5
docs/WASI-api.md
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@@ -1594,7 +1594,10 @@ Used by many functions in this API.
As in POSIX, three file descriptor numbers are provided to instances
on startup -- 0, 1, and 2, (a.k.a. `STDIN_FILENO`, `STDOUT_FILENO`,
and `STDERR_FILENO`).
and `STDERR_FILENO`). Starting at 3 follow a possibly-entry sequence
of preopened file descriptors provided by the host environment;
information about these may be obtained through
[`__wasi_fd_prestat_get()`](#fd_prestat_get).
Other than these, WASI implementations are not required to allocate
new file descriptors in ascending order.