put getrandom::Error into Error

crates/wasi-common/src/error.rs

@@ -14,6 +14,8 @@ pub enum Error {
     TryFromInt(#[from] std::num::TryFromIntError),
     #[error("Utf8Error: {0}")]
     Utf8(#[from] std::str::Utf8Error),
+    #[error("GetRandom: {0}")]
+    GetRandom(#[from] getrandom::Error),
 
     /// The host OS may return an io error that doesn't match one of the
     /// wasi errno variants we expect. We do not expose the details of this

crates/wasi-common/src/snapshots/wasi_snapshot_preview1.rs

@@ -5,7 +5,7 @@ use crate::wasi::wasi_snapshot_preview1::WasiSnapshotPreview1;
 use crate::wasi::{types, AsBytes};
 use crate::{path, poll};
 use crate::{Error, Result, WasiCtx};
-use log::{debug, error, trace};
+use log::{debug, trace};
 use std::convert::TryInto;
 use std::io::{self, SeekFrom};
 use wiggle::{GuestPtr, GuestSlice};
@@ -802,10 +802,8 @@ impl<'a> WasiSnapshotPreview1 for WasiCtx {
 
     fn random_get(&self, buf: &GuestPtr<u8>, buf_len: types::Size) -> Result<()> {
         let mut slice = buf.as_array(buf_len).as_slice()?;
-        getrandom::getrandom(&mut *slice).map_err(|err| {
-            error!("getrandom failure: {:?}", err);
-            Error::Io
-        })
+        getrandom::getrandom(&mut *slice)?;
+        Ok(())
     }
 
     fn sock_recv(

crates/wasi-common/src/wasi.rs

@@ -36,6 +36,7 @@ impl From<Error> for Errno {
             Error::TryFromInt(_) => Errno::Overflow,
             Error::Utf8(_) => Errno::Ilseq,
             Error::UnexpectedIo(_) => Errno::Io,
+            Error::GetRandom(_) => Errno::Io,
             Error::TooBig => Errno::TooBig,
             Error::Acces => Errno::Acces,
             Error::Badf => Errno::Badf,