* Open /dev/null for writing as well as reading.
Port this fix to wasi-common:
b905c44483
* Remove all remaining uses of `std::mem::uninitialized`.
Patch inspired by:
2d6519d051
* Replace libc::memcpy() calls with std::ptr::copy_nonoverlapping()
Port this fix to wasi-common:
a3f3a33e9b
* Pass `WasiError` by value.
It's a `u16` underneath, so we can pass it by value.
* Avoid unnecessary explicit lifetime parameters.
* Use immutable references rather than mutable references.
Patch inspired by:
54baa4c38c
