forked from openkylin/quarkai
81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
#include "filesystemwatcher.h"
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#include "util.h"
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#include <QDebug>
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FileSystemWatcher *FileSystemWatcher::m_watcher = NULL;
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FileSystemWatcher *FileSystemWatcher::instance()
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{
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if (!m_watcher) {
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m_watcher = new FileSystemWatcher;
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m_watcher->initWatcher();
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}
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return m_watcher;
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}
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FileSystemWatcher::FileSystemWatcher(QObject *parent)
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: QObject(parent)
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,m_fd(-1)
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{
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}
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FileSystemWatcher::~FileSystemWatcher()
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{
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this->clearWatcher();
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}
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bool FileSystemWatcher::initWatcher()
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{
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m_origFileSet = getFileContentsLineByLine(DEVICE_MOUNT_PONINT_RECORD_FILE);
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m_fd = open(DEVICE_MOUNT_PONINT_RECORD_FILE, O_RDONLY);
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if (m_fd == -1) {
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qDebug() << QString("open %1 failed!").arg(DEVICE_MOUNT_PONINT_RECORD_FILE);
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return false;
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}
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m_socketNotifier = new QSocketNotifier(m_fd, QSocketNotifier::Write, this);
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m_socketNotifier->setEnabled(true);
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connect(m_socketNotifier, &QSocketNotifier::activated, this, &FileSystemWatcher::onMountDeviceFileContentsChanged);
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return true;
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}
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bool FileSystemWatcher::watcherInitSuccess()
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{
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if (m_fd != -1 && m_socketNotifier) {
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return true;
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}
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else {
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return false;
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}
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}
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bool FileSystemWatcher::clearWatcher()
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{
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if (this->watcherInitSuccess()) {
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close(m_fd);
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m_fd = -1;
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delete m_socketNotifier;
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m_socketNotifier = nullptr;
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return true;
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}
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else {
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return false;
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}
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}
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void FileSystemWatcher::onMountDeviceFileContentsChanged()
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{
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QSet<QString> nowFileSet = getFileContentsLineByLine(DEVICE_MOUNT_PONINT_RECORD_FILE);
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for(const QString &mountPath: nowFileSet - m_origFileSet) {
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emit this->deviceAdded(getDeviceMountedPointPath(mountPath));
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}
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for(const QString &mountPath: m_origFileSet - nowFileSet) {
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emit this->deviceRemoved(getDeviceMountedPointPath(mountPath));
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}
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m_origFileSet = nowFileSet;
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}
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