diff --git a/file_io.cc b/file_io.cc
new file mode 100644
index 0000000..5bab442
--- /dev/null
+++ b/file_io.cc
@@ -0,0 +1,47 @@
+// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "shill/file_io.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <base/posix/eintr_wrapper.h>
+
+namespace shill {
+
+namespace {
+
+static base::LazyInstance<FileIO> g_file_io =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+FileIO::FileIO() {}
+
+FileIO::~FileIO() {}
+
+// static
+FileIO *FileIO::GetInstance() {
+  return g_file_io.Pointer();
+}
+
+ssize_t FileIO::Write(int fd, const void *buf, size_t count) {
+  return HANDLE_EINTR(write(fd, buf, count));
+}
+
+ssize_t FileIO::Read(int fd, void *buf, size_t count) {
+  return HANDLE_EINTR(read(fd, buf, count));
+}
+
+int FileIO::Close(int fd) {
+  return HANDLE_EINTR(close(fd));
+}
+
+int FileIO::SetFdNonBlocking(int fd) {
+  const int flags = HANDLE_EINTR(fcntl(fd, F_GETFL)) | O_NONBLOCK;
+  return HANDLE_EINTR(fcntl(fd, F_SETFL,  flags));
+}
+
+}  // namespace shill