[WasmFS] Ensure error codes are negative in the Node backend (#26598)

kleisauke · web-flow · commit 34f6bcfd5773 · 2026-04-02T09:16:07.000-07:00
See commit 48459c6 for details. Split out from #24733, this fixes a test failure in `core0.test_fs_js_api_wasmfs_rawfs` from that PR.
diff --git a/system/lib/wasmfs/backends/node_backend.cpp b/system/lib/wasmfs/backends/node_backend.cpp
@@ -256,7 +256,7 @@ class NodeDirectory : public Directory {
     }
 
     auto childPath = getChildPath(name);
-    return _wasmfs_node_rename(fromPath.c_str(), childPath.c_str());
+    return -_wasmfs_node_rename(fromPath.c_str(), childPath.c_str());
   }
 
   ssize_t getNumEntries() override {

Original file line number	Diff line number	Diff line change
`@@ -256,7 +256,7 @@ class NodeDirectory : public Directory {`
`256`	`256`	`}`
`257`	`257`
`258`	`258`	`auto childPath = getChildPath(name);`
`259`		`- return _wasmfs_node_rename(fromPath.c_str(), childPath.c_str());`
	`259`	`+ return -_wasmfs_node_rename(fromPath.c_str(), childPath.c_str());`
`260`	`260`	`}`
`261`	`261`
`262`	`262`	`ssize_t getNumEntries() override {`