blob: 86acbfad621c5ce23dc03ca76524ca3eadee2e35 [file] [log] [blame]
// Copyright (c) 2012 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/udev_linux/udev_linux.h"
#include <stddef.h>
#include "base/bind.h"
namespace device {
UdevLinux::UdevLinux(const std::vector<UdevMonitorFilter>& filters,
const UdevNotificationCallback& callback)
: udev_(udev_new()),
monitor_(udev_ ? udev_monitor_new_from_netlink(udev_.get(), "udev")
: nullptr),
callback_(callback) {
if (!monitor_) {
LOG(ERROR) << "Failed to initialize udev, possibly due to an invalid "
<< "system configuration. Various device-related browser "
<< "features may be broken.";
for (const UdevMonitorFilter& filter : filters) {
const int ret = udev_monitor_filter_add_match_subsystem_devtype(
monitor_.get(), filter.subsystem, filter.devtype);
CHECK_EQ(0, ret);
const int ret = udev_monitor_enable_receiving(monitor_.get());
CHECK_EQ(0, ret);
monitor_fd_ = udev_monitor_get_fd(monitor_.get());
CHECK_GE(monitor_fd_, 0);
monitor_watch_controller_ = base::FileDescriptorWatcher::WatchReadable(
monitor_fd_, base::Bind(&UdevLinux::OnMonitorCanReadWithoutBlocking,
UdevLinux::~UdevLinux() = default;
udev* UdevLinux::udev_handle() {
return udev_.get();
void UdevLinux::OnMonitorCanReadWithoutBlocking() {
// Events occur when devices attached to the system are added, removed, or
// change state. udev_monitor_receive_device() will return a device object
// representing the device which changed and what type of change occured.
ScopedUdevDevicePtr dev(udev_monitor_receive_device(monitor_.get()));
if (!dev)
} // namespace device