Fix node rawfs

Author: hoodmane

src/library_fs.js

@@ -938,6 +938,10 @@ FS.staticInit();
       }
       return node.node_ops.getattr(node);
     },
+    fstat(fd) {
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      return stream.node.node_ops.getattr(stream.node);
+    },
     lstat(path) {
       return FS.stat(path, true);
     },

src/library_noderawfs.js

@@ -79,6 +79,10 @@ addToLibrary({
       }
       return stat;
     },
+    fstat(fd) {
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      return fs.fstatSync(stream.nfd);
+    },
     chmod(path, mode, dontFollow) {
       mode &= {{{ cDefs.S_IALLUGO }}};
       if (NODEFS.isWindows) {

src/library_syscall.js

@@ -679,8 +679,7 @@ var SyscallsLibrary = {
     return SYSCALLS.doStat(FS.lstat, path, buf);
   },
   __syscall_fstat64: (fd, buf) => {
-    var stream = SYSCALLS.getStreamFromFD(fd);
-    return SYSCALLS.doStat(stream.node.node_ops.getattr, stream.node, buf);
+    return SYSCALLS.doStat(FS.fstat, fd, buf);
   },
   __syscall_fchown32: (fd, owner, group) => {
     FS.fchown(fd, owner, group);

test/test_core.py

@@ -5921,6 +5921,7 @@ def test_fs_64bit(self):
       self.set_setting('FORCE_FILESYSTEM')
     self.do_runf('fs/test_64bit.c', 'success')
 
+  @also_with_noderawfs
   def test_fs_stat_unnamed_file_descriptor(self):
     if self.get_setting('WASMFS'):
       self.set_setting('FORCE_FILESYSTEM')