Add mount and unmount functionality to TDE disk hardware class

tdecore/tdehardwaredevices.cpp

@@ -22,6 +22,9 @@
 #include <tqdir.h>
 #include <tqstringlist.h>
 
+#include <kglobal.h>
+#include <ktempfile.h>
+
 #include <libudev.h>
 
 #include <fcntl.h>
@@ -173,6 +176,22 @@ TQString TDEStorageDevice::mountPath() {
 	// See if this device node is mounted
 	// This requires parsing /proc/mounts, looking for deviceNode()
 
+	// The Device Mapper throws a monkey wrench into this
+	// It likes to advertise mounts as /dev/mapper/<something>,
+	// where <something> is listed in <system path>/dm/name
+	TQString dmnodename = systemPath();
+	dmnodename.append("/dm/name");
+	TQFile namefile( dmnodename );
+	TQString dmaltname;
+	if ( namefile.open( IO_ReadOnly ) ) {
+		TQTextStream stream( &namefile );
+		dmaltname = stream.readLine();
+		namefile.close();
+	}
+	if (!dmaltname.isNull()) {
+		dmaltname.prepend("/dev/mapper/");
+	}
+
 	TQStringList lines;
 	TQFile file( "/proc/mounts" );
 	if ( file.open( IO_ReadOnly ) ) {
@@ -181,7 +200,7 @@ TQString TDEStorageDevice::mountPath() {
 		while ( !stream.atEnd() ) {
 			line = stream.readLine();
 			TQStringList mountInfo = TQStringList::split(" ", line, true);
-			if (*mountInfo.at(0) == deviceNode()) {
+			if ((*mountInfo.at(0) == deviceNode()) || (*mountInfo.at(0) == dmaltname)) {
 				return *mountInfo.at(1);
 			}
 			lines += line;
@@ -189,9 +208,90 @@ TQString TDEStorageDevice::mountPath() {
 		file.close();
 	}
 
+	// While this device is not directly mounted, it could concievably be mounted via the Device Mapper
+	// If so, try to retrieve the mount path...
+	TQStringList slaveDeviceList = slaveDevices();
+	for ( TQStringList::Iterator slavedevit = slaveDeviceList.begin(); slavedevit != slaveDeviceList.end(); ++slavedevit ) {
+		// Try to locate this device path in the TDE device tree
+		TDEHardwareDevices *hwdevices = KGlobal::hardwareDevices();
+		TDEGenericDevice *hwdevice = hwdevices->findBySystemPath(*slavedevit);
+		if ((hwdevice) && (hwdevice->type() == TDEGenericDeviceType::Disk)) {
+			TDEStorageDevice* sdevice = static_cast<TDEStorageDevice*>(hwdevice);
+			return sdevice->mountPath();
+		}
+	}
+
+	return TQString::null;
+}
+
+TQString TDEStorageDevice::mountDevice(TQString mediaName) {
+	TQString ret = mountPath();
+
+	if (!ret.isNull()) {
+		return ret;
+	}
+
+	// Create dummy password file
+	KTempFile passwordFile(TQString::null, "tmp", 0600);
+	passwordFile.setAutoDelete(true);
+
+	TQString command = TQString("pmount -p %1 %2").arg(passwordFile.name()).arg(deviceNode());
+	if (!mediaName.isNull()) {
+		command.append(mediaName);
+	}
+
+	if (system(command.ascii()) == 0) {
+		ret = mountPath();
+	}
+
+	return ret;
+}
+
+TQString TDEStorageDevice::mountEncryptedDevice(TQString passphrase, TQString mediaName) {
+	TQString ret = mountPath();
+
+	if (!ret.isNull()) {
+		return ret;
+	}
+
+	// Create dummy password file
+	KTempFile passwordFile(TQString::null, "tmp", 0600);
+	passwordFile.setAutoDelete(true);
+	TQFile* pwFile = passwordFile.file();
+	if (!pwFile) {
 		return TQString::null;
 	}
 
+	pwFile->writeBlock(passphrase.ascii(), passphrase.length());
+	pwFile->flush();
+
+	TQString command = TQString("pmount -p %1 %2").arg(passwordFile.name()).arg(deviceNode());
+	if (!mediaName.isNull()) {
+		command.append(mediaName);
+	}
+
+	if (system(command.ascii()) == 0) {
+		ret = mountPath();
+	}
+
+	return ret;
+}
+
+bool TDEStorageDevice::unmountDevice() {
+	TQString mountpoint = mountPath();
+
+	if (mountpoint.isNull()) {
+		return true;
+	}
+
+	TQString command = TQString("pumount %1").arg(mountpoint);
+	if (system(command.ascii()) == 0) {
+		return true;
+	}
+
+	return false;
+}
+
 TDEHardwareDevices::TDEHardwareDevices() {
 	// Set up device list
 	m_deviceList.setAutoDelete( TRUE );	// the list owns the objects
@@ -235,6 +335,17 @@ TDEHardwareDevices::~TDEHardwareDevices() {
 	udev_unref(m_udevStruct);
 }
 
+TDEGenericDevice* TDEHardwareDevices::findBySystemPath(TQString syspath) {
+	TDEGenericDevice *hwdevice;
+	for ( hwdevice = m_deviceList.first(); hwdevice; hwdevice = m_deviceList.next() ) {
+		if (hwdevice->systemPath() == syspath) {
+			return hwdevice;
+		}
+	}
+
+	return 0;
+}
+
 void TDEHardwareDevices::checkForHotPluggedHardware() {
 	udev_device* dev = udev_monitor_receive_device(m_udevMonitorStruct);
 	if (dev) {

tdecore/tdehardwaredevices.h

@@ -347,6 +347,30 @@ class TDECORE_EXPORT TDEStorageDevice : public TDEGenericDevice
 		*/
 		void setSlaveDevices(TQStringList sd);
 
+		/**
+		* Mounts the device if not encrypted
+		*
+		* @param a TQString containing a requested mount name under /media, if desired
+		* @return a TQString with the mount path, if successful
+		*/
+		TQString mountDevice(TQString mediaName=TQString::null);
+
+		/**
+		* Mounts the encrypted device if the correct passphrase is given
+		*
+		* @param a TQString containing the passphrase
+		* @param a TQString containing a requested mount name under /media, if desired
+		* @return a TQString with the mount path, if successful
+		*/
+		TQString mountEncryptedDevice(TQString passphrase, TQString mediaName=TQString::null);
+
+		/**
+		* Unmounts the device
+		*
+		* @return TRUE if unmount was successful
+		*/
+		bool unmountDevice();
+
 		/**
 		* @return a TQString with the mount path, if mounted
 		*/
@@ -400,6 +424,12 @@ class TDECORE_EXPORT TDEHardwareDevices : TQObject
 		*/
 		TQPtrList<TDEGenericDevice> &listAllPhysicalDevices();
 
+		/**
+		*  Return the device with system path @arg syspath, or 0 if no device exists for that path
+		*  @return TDEGenericDevice
+		*/
+		TDEGenericDevice* findBySystemPath(TQString syspath);
+
 	signals:
 		void hardwareAdded(TDEGenericDevice);
 		void hardwareRemoved(TDEGenericDevice);