/* Copyright 2009 Benjamin K. Stuhl This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) version 3, or any later version accepted by the membership of KDE e.V. (or its successor approved by the membership of KDE e.V.), which shall act as a proxy defined in Section 6 of version 3 of the license. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library. If not, see . */ #include "udevqt.h" #include "udevqt_p.h" #include #include namespace UdevQt { ClientPrivate::ClientPrivate(Client *q_) : udev(0), monitor(0), q(q_), monitorNotifier(0) { } ClientPrivate::~ClientPrivate() { udev_unref(udev); delete monitorNotifier; if (monitor) udev_monitor_unref(monitor); } void ClientPrivate::init(const QStringList &subsystemList, ListenToWhat what) { udev = udev_new(); if (what != ListenToNone) { setWatchedSubsystems(subsystemList); } } void ClientPrivate::setWatchedSubsystems(const QStringList &subsystemList) { // create a listener struct udev_monitor *newM = udev_monitor_new_from_netlink(udev, "udev"); if (!newM) { qWarning("UdevQt: unable to create udev monitor connection"); return; } // apply our filters; an empty list means listen to everything foreach (const QString& subsysDevtype, subsystemList) { int ix = subsysDevtype.indexOf("/"); if (ix > 0) { QByteArray subsystem = subsysDevtype.left(ix).toLatin1(); QByteArray devType = subsysDevtype.mid(ix + 1).toLatin1(); udev_monitor_filter_add_match_subsystem_devtype(newM, subsystem.constData(), devType.constData()); } else { udev_monitor_filter_add_match_subsystem_devtype(newM, subsysDevtype.toLatin1().constData(), NULL); } } // start the new monitor receiving udev_monitor_enable_receiving(newM); QSocketNotifier *sn = new QSocketNotifier(udev_monitor_get_fd(newM), QSocketNotifier::Read); QObject::connect(sn, SIGNAL(activated(int)), q, SLOT(_uq_monitorReadyRead(int))); // kill any previous monitor delete monitorNotifier; if (monitor) udev_monitor_unref(monitor); // and save our new one monitor = newM; monitorNotifier = sn; watchedSubsystems = subsystemList; } void ClientPrivate::_uq_monitorReadyRead(int fd) { Q_UNUSED(fd); monitorNotifier->setEnabled(false); struct udev_device *dev = udev_monitor_receive_device(monitor); monitorNotifier->setEnabled(true); if (!dev) return; Device device(new DevicePrivate(dev, false)); QByteArray action(udev_device_get_action(dev)); if (action == "add") { emit q->deviceAdded(device); } else if (action == "remove") { emit q->deviceRemoved(device); } else if (action == "change") { emit q->deviceChanged(device); } else if (action == "online") { emit q->deviceOnlined(device); } else if (action == "offline") { emit q->deviceOfflined(device); } else { qWarning("UdevQt: unhandled device action \"%s\"", action.constData()); } } DeviceList ClientPrivate::deviceListFromEnumerate(struct udev_enumerate *en) { DeviceList ret; struct udev_list_entry *list, *entry; udev_enumerate_scan_devices(en); list = udev_enumerate_get_list_entry(en); udev_list_entry_foreach(entry, list) { struct udev_device *ud = udev_device_new_from_syspath(udev_enumerate_get_udev(en), udev_list_entry_get_name(entry)); if (!ud) continue; ret << Device(new DevicePrivate(ud, false)); } udev_enumerate_unref(en); return ret; } Client::Client(QObject *parent) : QObject(parent) , d(new ClientPrivate(this)) { d->init(QStringList(), ClientPrivate::ListenToNone); } Client::Client(const QStringList& subsystemList, QObject *parent) : QObject(parent) , d(new ClientPrivate(this)) { d->init(subsystemList, ClientPrivate::ListenToList); } Client::~Client() { delete d; } QStringList Client::watchedSubsystems() const { // we're watching a specific list if (!d->watchedSubsystems.isEmpty()) return d->watchedSubsystems; // we're not watching anything if (!d->monitor) return QStringList(); // we're watching everything: figure out what "everything" currently is // we don't cache it, since it may be subject to change, depending on hotplug struct udev_enumerate *en = udev_enumerate_new(d->udev); udev_enumerate_scan_subsystems(en); QStringList s = listFromListEntry(udev_enumerate_get_list_entry(en)); udev_enumerate_unref(en); return s; } void Client::setWatchedSubsystems(const QStringList &subsystemList) { d->setWatchedSubsystems(subsystemList); } DeviceList Client::devicesByProperty(const QString &property, const QVariant &value) { struct udev_enumerate *en = udev_enumerate_new(d->udev); if (value.isValid()) { udev_enumerate_add_match_property(en, property.toLatin1().constData(), value.toString().toLatin1().constData()); } else { udev_enumerate_add_match_property(en, property.toLatin1().constData(), NULL); } return d->deviceListFromEnumerate(en); } DeviceList Client::allDevices() { struct udev_enumerate *en = udev_enumerate_new(d->udev); return d->deviceListFromEnumerate(en); } DeviceList Client::devicesBySubsystem(const QString &subsystem) { struct udev_enumerate *en = udev_enumerate_new(d->udev); udev_enumerate_add_match_subsystem(en, subsystem.toLatin1().constData()); return d->deviceListFromEnumerate(en); } Device Client::deviceByDeviceFile(const QString &deviceFile) { struct stat sb; if (stat(deviceFile.toLatin1().constData(), &sb) != 0) return Device(); struct udev_device *ud = 0; if (S_ISBLK(sb.st_mode)) ud = udev_device_new_from_devnum(d->udev, 'b', sb.st_rdev); else if (S_ISCHR(sb.st_mode)) ud = udev_device_new_from_devnum(d->udev, 'c', sb.st_rdev); if (!ud) return Device(); return Device(new DevicePrivate(ud, false)); } Device Client::deviceBySysfsPath(const QString &sysfsPath) { struct udev_device *ud = udev_device_new_from_syspath(d->udev, sysfsPath.toLatin1().constData()); if (!ud) return Device(); return Device(new DevicePrivate(ud, false)); } Device Client::deviceBySubsystemAndName(const QString &subsystem, const QString &name) { struct udev_device *ud = udev_device_new_from_subsystem_sysname(d->udev, subsystem.toLatin1().constData(), name.toLatin1().constData()); if (!ud) return Device(); return Device(new DevicePrivate(ud, false)); } } #include "moc_udevqt.cpp"