Use udev for serial device enumeration on Linux

device/serial/serial_device_enumerator_mac.cc

+// Copyright (c) 2014 The Chromium 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 "device/serial/serial_device_enumerator_mac.h"
+
+#include "base/file_util.h"
+#include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string_util.h"
+
+namespace device {
+
+// static
+scoped_ptr<SerialDeviceEnumerator> SerialDeviceEnumerator::Create() {
+  return scoped_ptr<SerialDeviceEnumerator>(new SerialDeviceEnumeratorMac());
+}
+
+SerialDeviceEnumeratorMac::SerialDeviceEnumeratorMac() {}
+
+SerialDeviceEnumeratorMac::~SerialDeviceEnumeratorMac() {}
+
+void SerialDeviceEnumeratorMac::GetDevices(
+    std::vector<SerialDeviceInfo>* devices) {
+  const base::FilePath kDevRoot("/dev");
+  const int kFilesAndSymLinks =
+      base::FileEnumerator::FILES | base::FileEnumerator::SHOW_SYM_LINKS;
+
+  std::set<std::string> valid_patterns;
+  valid_patterns.insert("/dev/*Bluetooth*");
+  valid_patterns.insert("/dev/*Modem*");
+  valid_patterns.insert("/dev/*bluetooth*");
+  valid_patterns.insert("/dev/*modem*");
+  valid_patterns.insert("/dev/*serial*");
+  valid_patterns.insert("/dev/tty.*");
+  valid_patterns.insert("/dev/cu.*");
+
+  devices->clear();
+  base::FileEnumerator enumerator(kDevRoot, false, kFilesAndSymLinks);
+  do {
+    const base::FilePath next_device_path(enumerator.Next());
+    const std::string next_device = next_device_path.value();
+    if (next_device.empty())
+      break;
+
+    std::set<std::string>::const_iterator i = valid_patterns.begin();
+    for (; i != valid_patterns.end(); ++i) {
+      if (MatchPattern(next_device, *i)) {
+        SerialDeviceInfo info;
+        info.path = next_device;
+        devices->push_back(info);

[rpaquay, 2014/02/12 00:39:28]

I am assuming we don't know of any way to retrieve product_name, vendor_id, etc.
in the MacOS implementation. Maybe we could add a "TODO" or create a bug (in
case someone somewhere knows how to do that)?

[Ken Rockot(use gerrit already), 2014/02/12 01:22:45]

Done.

+        break;
+      }
+    }
+  } while (true);
+}
+
+}  // namespace device