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/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
2 of the License, or (at your option) any later version.
*/
#include <QVarLengthArray>
#include <QMutexLocker>
#include <QDateTime>
#include <QDir>
#include <QSemaphore>
#include <sys/inotify.h>
#include <stropts.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <errno.h>
#include "smdirwatcher.h"
#include "smtreeitem.h"
#include "helper.h"
extern int errno;
SmDirWatcher::SmDirWatcher(QObject *parent) : QThread(parent), mFd(0), mDescr(0) {
mBufLen = 1024 * (sizeof(struct inotify_event) + 16);
mINdata = new char[mBufLen];
mFd = inotify_init();
mCollector = new SmDataColletor(8, this);
mSemFree = new QSemaphore(1024);
mSemUsed = new QSemaphore;
mDataQueue = new QQueue<QPair<QString, DWEvent> >();
mCollector->init(mSemFree, mSemUsed, mDataQueue);
mCollector->start();
}
SmDirWatcher::~SmDirWatcher(){
mCollector->terminate();
mCollector->wait();
if(mFd && mDescr){
inotify_rm_watch(mFd, mDescr);
}
delete mINdata;
}
void SmDirWatcher::setDir(const QString &dir){
if(mDescr){
inotify_rm_watch(mFd, mDescr); //generates IN_IGNORE ???
}
/* mask rationale:
* IN_DELETE_SELF cannot happen since we're only
* watching one directory at all time.
* We don't care about the other events
*/
mDescr = inotify_add_watch(mFd, qPrintable(dir), IN_CLOSE_WRITE | IN_CREATE | IN_DELETE | IN_MODIFY | IN_MOVED_FROM | IN_MOVED_TO);
mCurrent = dir;
mSemFree->acquire();
QPair<QString, DWEvent> c = qMakePair(dir, Populate);
mDataQueue->enqueue(c);
mSemUsed->release();
}
void SmDirWatcher::run(){
int r = read(mFd, mINdata, mBufLen);
if(r <= 0){
return;
}
int i = 0;
while(i < r){
inotify_event *e = reinterpret_cast<inotify_event*>(&mINdata[i]);
if((!e->len) || (e->mask & IN_IGNORED)){
i += sizeof(inotify_event) + e->len;
continue;
}
mSemFree->acquire();
quint32 mask = e->mask;
QString name = QString("%1/%2").arg(mCurrent).arg(e->name);
DWEvent curEvent = None;
if(mask & IN_CREATE || mask & IN_MOVED_TO){
curEvent = Added;
}
if(mask & IN_DELETE || mask & IN_MOVED_FROM){
curEvent = Deleted;
}
if(mask & IN_CLOSE_WRITE || e->mask & IN_MODIFY){
curEvent = Modified;
}
QPair<QString, DWEvent> c = qMakePair(name, curEvent);
mDataQueue->enqueue(c);
mSemUsed->release();
i += sizeof(inotify_event) + e->len;
}
}
SmDataColletor::SmDataColletor(const int numFields, QObject *parent) : QThread(parent), mSemFree(0), mSemUsed(0), mDataQueue(0), mNumFields(numFields) {}
void SmDataColletor::init(QSemaphore *set, QSemaphore *get, QQueue<QPair<QString, SmDirWatcher::DWEvent> > *data){
mSemFree = set;
mSemUsed = get;
mDataQueue = data;
}
void SmDataColletor::run(){
forever {
mSemUsed->acquire();
QPair<QString, SmDirWatcher::DWEvent> cur = mDataQueue->dequeue();
if(cur.second == SmDirWatcher::Populate){
SmTreeItem *i = populate(cur.first);
emit population(i);
mSemFree->release();
continue;
}
QFileInfo fi(cur.first);
QList<QVariant> fd = fileData(fi);
emit newData(fd, cur.second);
mSemFree->release();
}
}
SmTreeItem * SmDataColletor::populate(const QString &dir){
SmTreeItem *retval = new SmTreeItem(mNumFields);
QDir d = QDir(dir);
foreach(QFileInfo fi, d.entryInfoList()){
if(fi.fileName() == "."){
continue;
}
QList<QVariant> data = fileData(fi);
SmTreeItem *newItem = new SmTreeItem(data, retval);
retval->appendChild(newItem);
}
return retval;
}
const QList<QVariant> SmDataColletor::fileData(const QFileInfo &fi) const{
QList<QVariant> data;
data << fi.fileName() << fi.size();
QString mime = Helper::mimeType(fi.absoluteFilePath());
data << mime;
data << fi.lastModified();
QList<QVariant> si = QList<QVariant>() << QVariant() << QVariant();
if(mime.startsWith("video")){
si = Helper::duration(fi.absoluteFilePath());
}
data << Helper::md5Sum(fi.absoluteFilePath());
data << si << fi.absoluteFilePath();
return data;
}
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