open large file in qt?

[marcel]

What does Get Info in Finder has to say about /dev?
I mean, do you have any permissions at all?

[patrik08]

What does Get Info in Finder has to say about /dev?
I mean, do you have any permissions at all?

Normal ist /Volumes

#if defined Q_WS_MAC
  /* apple + K */
  label_webdav->setText(tr("Mac OS: Mount Disk Webdav Root"));
  QString listdiron ="/Volumes/"; 
  webdav_root->addItem(disksetting);
  /* webdav_root->addItem(listdiron);*/
              QDir dir(listdiron);
              if (dir.exists()) {
                  const QFileInfoList list = dir.entryInfoList();
                      QFileInfo fi;
                      for (int i = 0; i < list.size(); i++)
                      {
                          fi = list.at(i);
                             if (fi.isDir() && fi.fileName() != "." && fi.fileName() != "..") {
                                 QString disker = fi.absoluteFilePath();
                                 QString diskeree = disker.append("/");
                                webdav_root->addItem(diskeree); 
                             }
                      }
              }
  webdav_root->setEditable(false);
#endif

#if defined Q_WS_MAC
  /* apple + K */
  label_webdav->setText(tr("Mac OS: Mount Disk Webdav Root"));
  QString listdiron ="/Volumes/"; 
  webdav_root->addItem(disksetting);
  /* webdav_root->addItem(listdiron);*/
              QDir dir(listdiron);
              if (dir.exists()) {
                  const QFileInfoList list = dir.entryInfoList();
                      QFileInfo fi;
                      for (int i = 0; i < list.size(); i++)
                      {
                          fi = list.at(i);
                             if (fi.isDir() && fi.fileName() != "." && fi.fileName() != "..") {
                                 QString disker = fi.absoluteFilePath();
                                 QString diskeree = disker.append("/");
                                webdav_root->addItem(diskeree); 
                             }
                      }
              }
  webdav_root->setEditable(false);
#endif

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[vishal.chauhan]

Thanks for Reply.

But Actually I want to open the HardDisk not to read Dir or File Actually I have to Read the Bytes from the HardDisk.
I have a function to do that but Actually It can not able to open the file. I have also used c function open("/dev/rdisk0",O_RDONLY) but it also not able to open the Drives.

It is showing that it has read write permission when I see from Getinfo in finder.
Actually I have tried on other system but it doesnot work.

It is working when I open a removable media but not in case of Hard disk.

[wysota]

What does ls -l /dev/rdisk0 return?

[vishal.chauhan]

Hey guys I got it.
Actually I am login as admin but it have some file system permission to root user.

So I just enabled user root and now it is running correctly.

Guys Thanks for reply.