From fc3c24634ee8e44e9c27be14d4189ff3e4256f6d Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Fri, 29 Mar 2013 22:02:21 -0500
Subject: [PATCH] Add new lockDriveMedia method to TDE hardware manager

---
 tdecore/tdehardwaredevices.cpp | 28 ++++++++++++++++++++++++++++
 tdecore/tdehardwaredevices.h   |  8 ++++++++
 2 files changed, 36 insertions(+)

diff --git a/tdecore/tdehardwaredevices.cpp b/tdecore/tdehardwaredevices.cpp
index 418326bf0..b385538fb 100644
--- a/tdecore/tdehardwaredevices.cpp
+++ b/tdecore/tdehardwaredevices.cpp
@@ -40,6 +40,7 @@
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <linux/fs.h>
+#include <linux/cdrom.h>
 
 // Backlight devices
 #include <linux/fb.h>
@@ -433,6 +434,21 @@ bool TDEStorageDevice::checkDiskStatus(TDEDiskDeviceStatus::TDEDiskDeviceStatus
 	return ((m_diskStatus&sf)!=(TDEDiskDeviceStatus::TDEDiskDeviceStatus)0);
 }
 
+bool TDEStorageDevice::lockDriveMedia(bool lock) {
+	int fd = open(deviceNode().ascii(), O_RDWR | O_NONBLOCK);
+	if (fd < 0) {
+		return false;
+	}
+	if (ioctl(fd, CDROM_LOCKDOOR, (lock)?1:0) != 0) {
+		close(fd);
+		return false;
+	}
+	else {
+		close(fd);
+		return true;
+	}
+}
+
 TQString TDEStorageDevice::diskLabel() {
 	return m_diskName;
 }
@@ -989,6 +1005,9 @@ bool TDECPUDevice::canSetGovernor() {
 			if (reply.type() == TQT_DBusMessage::ReplyMessage && reply.count() == 1) {
 				return reply[0].toVariant().value.toBool();
 			}
+			else {
+				return FALSE;
+			}
 		}
 		else {
 			return FALSE;
@@ -1168,6 +1187,9 @@ bool TDERootSystemDevice::canSuspend() {
 			if (reply.type() == TQT_DBusMessage::ReplyMessage && reply.count() == 1) {
 				return reply[0].toVariant().value.toBool();
 			}
+			else {
+				return FALSE;
+			}
 		}
 		else {
 			return FALSE;
@@ -1202,6 +1224,9 @@ bool TDERootSystemDevice::canHibernate() {
 			if (reply.type() == TQT_DBusMessage::ReplyMessage && reply.count() == 1) {
 				return reply[0].toVariant().value.toBool();
 			}
+			else {
+				return FALSE;
+			}
 		}
 		else {
 			return FALSE;
@@ -1675,6 +1700,9 @@ bool TDEBacklightDevice::canSetBrightness() {
 			if (reply.type() == TQT_DBusMessage::ReplyMessage && reply.count() == 1) {
 				return reply[0].toVariant().value.toBool();
 			}
+			else {
+				return FALSE;
+			}
 		}
 		else {
 			return FALSE;
diff --git a/tdecore/tdehardwaredevices.h b/tdecore/tdehardwaredevices.h
index 0363596e4..1f41f6267 100644
--- a/tdecore/tdehardwaredevices.h
+++ b/tdecore/tdehardwaredevices.h
@@ -653,6 +653,14 @@ class TDECORE_EXPORT TDEStorageDevice : public TDEGenericDevice
 		*/
 		bool checkDiskStatus(TDEDiskDeviceStatus::TDEDiskDeviceStatus sf);
 
+		/**
+		* @param TRUE to engage media lock, FALSE to disable it
+		* @return TRUE on success, FALSE on failure
+		*
+		* This method currently works on CD-ROM drives and similar devices
+		*/
+		bool lockDriveMedia(bool lock);
+
 	protected:
 		/**
 		* @param a TQString with the disk or partition label, if any