Actually mount when mapping into /

wasmerio · May 31, 2023 · eec73b7 · eec73b7
1 parent 2b1fa2f
commit eec73b7
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Showing 2 changed files with 12 additions and 0 deletions.
diff --git a/lib/virtual-fs/src/tmp_fs.rs b/lib/virtual-fs/src/tmp_fs.rs
@@ -42,6 +42,17 @@ impl TmpFileSystem {
         self.fs.union(other)
     }
 
+    /// See [`mem_fs::FileSystem::mount_directory_entries`].
+    pub fn mount_directory_entries(
+        &self,
+        target_path: &Path,
+        other: &Arc<dyn crate::FileSystem + Send + Sync>,
+        source_path: &Path,
+    ) -> Result<()> {
+        self.fs
+            .mount_directory_entries(target_path, other, source_path)
+    }
+
     pub fn mount(
         &self,
         src_path: PathBuf,

diff --git a/lib/wasi/src/runners/wasi_common.rs b/lib/wasi/src/runners/wasi_common.rs
@@ -121,6 +121,7 @@ fn prepare_filesystem(
                 })?;
 
             if guest_path == Path::new("/") {
+                root_fs.mount_directory_entries(&guest_path, &host_fs, &host_path)?;
             } else {
                 if let Some(parent) = guest_path.parent() {
                     create_dir_all(&root_fs, parent).with_context(|| {