Implement getting a BInstallationLocationInfo

* Rename PackageDaemonDefs.h to DaemonDefs.h.
* Replace the MESSAGE_GET_PACKAGES by the new
  B_MESSAGE_GET_INSTALLATION_LOCATION_INFO, which not only returns the
  packages, but also other information about the installation location.
* daemon: Volume: Implement a change count which is bumped whenever
  packages are activated/deactivated/added/removed. Cache the reply
  for a location info request, using the change count to check whether
  it is still up-to-date.
* Add private BDaemonClient for communication with the daemon.
* BRoster:
  - Add GetInstallationLocationInfo() using BDaemonClient.
  - Reimplement GetActivePackages(), using
    GetInstallationLocationInfo().

headers/os/package/PackageRoster.h

@@ -28,6 +28,7 @@ struct BRepositoryConfigVisitor {
 };
 
 
+class BInstallationLocationInfo;
 class BPackageInfoSet;
 class BRepositoryCache;
 class BRepositoryConfig;
@@ -60,6 +61,9 @@ public:
 			status_t			GetRepositoryConfig(const BString& name,
 									BRepositoryConfig* repositoryConfig);
 
+			status_t			GetInstallationLocationInfo(
+									BPackageInstallationLocation location,
+									BInstallationLocationInfo& _info);
 			status_t			GetActivePackages(
 									BPackageInstallationLocation location,
 									BPackageInfoSet& packageInfos);

headers/private/package/DaemonClient.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <ingo_weinhold@gmx.de>
+ */
+#ifndef _PACKAGE__PRIVATE__DAEMON_CLIENT_H_
+#define _PACKAGE__PRIVATE__DAEMON_CLIENT_H_
+
+
+#include <Messenger.h>
+#include <package/PackageDefs.h>
+
+
+namespace BPackageKit {
+
+
+class BInstallationLocationInfo;
+class BPackageInfoSet;
+
+
+namespace BPrivate {
+
+
+class BDaemonClient {
+public:
+								BDaemonClient();
+								~BDaemonClient();
+
+			status_t			GetInstallationLocationInfo(
+									BPackageInstallationLocation location,
+									BInstallationLocationInfo& _info);
+
+private:
+			status_t			_InitMessenger();
+			status_t			_ExtractPackageInfoSet(const BMessage& message,
+									const char* field, BPackageInfoSet& _infos);
+
+private:
+			BMessenger			fDaemonMessenger;
+};
+
+
+}	// namespace BPrivate
+}	// namespace BPackageKit
+
+
+#endif	// _PACKAGE__PRIVATE__DAEMON_CLIENT_H_

headers/private/package/DaemonDefs.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <ingo_weinhold@gmx.de>
+ */
+#ifndef _PACKAGE__PRIVATE__DAEMON_DEFS_H_
+#define _PACKAGE__PRIVATE__DAEMON_DEFS_H_
+
+
+namespace BPackageKit {
+namespace BPrivate {
+
+
+#define B_PACKAGE_DAEMON_APP_SIGNATURE "application/x-vnd.haiku-package_daemon"
+
+
+enum BDaemonError {
+	B_DAEMON_OK
+};
+
+
+// message codes for requests to and replies from the daemon
+enum {
+	B_MESSAGE_GET_INSTALLATION_LOCATION_INFO		= 'PKLI',
+		// "location": int32
+		//		the respective installation location constant
+	B_MESSAGE_GET_INSTALLATION_LOCATION_INFO_REPLY	= 'PKLR',
+		// "base directory device": int32
+		// "base directory node": int64
+		// "packages directory device": int32
+		// "packages directory node": int64
+		// "change count": int64
+		// "active packages": message[]
+		//		archived BPackageInfos of the active packages
+		// "inactive packages": message[]
+		//		archived BPackageInfos of the inactive packages
+};
+
+
+#endif	// _PACKAGE__PRIVATE__DAEMON_DEFS_H_
+
+
+}	// namespace BPrivate
+}	// namespace BPackageKit

headers/private/package/PackageDaemonDefs.h

@@ -1,37 +0,0 @@
-/*
- * Copyright 2013, Haiku, Inc. All Rights Reserved.
- * Distributed under the terms of the MIT License.
- *
- * Authors:
- *		Ingo Weinhold <ingo_weinhold@gmx.de>
- */
-#ifndef _PACKAGE__PRIVATE__PACKAGE_DAEMON_DEFS_H_
-#define _PACKAGE__PRIVATE__PACKAGE_DAEMON_DEFS_H_
-
-
-namespace BPackageKit {
-namespace BPrivate {
-
-
-#define PACKAGE_DAEMON_APP_SIGNATURE "application/x-vnd.haiku-package_daemon"
-
-
-// message codes for requests to and replies from the daemon
-enum {
-	MESSAGE_GET_PACKAGES		= 'PKGG',
-		// "location": int32
-		//		the respective installation location constant
-	MESSAGE_GET_PACKAGES_REPLY	= 'PKGR'
-		// "active packages": string[]
-		//		file names of the active packages (no path)
-		// "inactive packages": string[]
-		//		file names of the inactive packages (no path)
-	
-};
-
-
-#endif	// _PACKAGE__PRIVATE__PACKAGE_DAEMON_DEFS_H_
-
-
-}	// namespace BPrivate
-}	// namespace BPackageKit

src/kits/package/DaemonClient.cpp

@@ -0,0 +1,137 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <ingo_weinhold@gmx.de>
+ */
+
+
+#include <package/DaemonClient.h>
+
+#include <package/InstallationLocationInfo.h>
+#include <package/PackageInfo.h>
+
+#include <package/DaemonDefs.h>
+
+
+namespace BPackageKit {
+namespace BPrivate {
+
+
+BDaemonClient::BDaemonClient()
+	:
+	fDaemonMessenger()
+{
+}
+
+
+BDaemonClient::~BDaemonClient()
+{
+}
+
+
+status_t
+BDaemonClient::GetInstallationLocationInfo(
+	BPackageInstallationLocation location, BInstallationLocationInfo& _info)
+{
+	status_t error = _InitMessenger();
+	if (error != B_OK)
+		return error;
+
+	// send the request
+	BMessage request(B_MESSAGE_GET_INSTALLATION_LOCATION_INFO);
+	error = request.AddInt32("location", location);
+	if (error != B_OK)
+		return error;
+
+	BMessage reply;
+	fDaemonMessenger.SendMessage(&request, &reply);
+	if (reply.what != B_MESSAGE_GET_INSTALLATION_LOCATION_INFO_REPLY)
+		return B_ERROR;
+
+	// extract the location info
+	int32 baseDirectoryDevice;
+	int64 baseDirectoryNode;
+	int32 packagesDirectoryDevice;
+	int64 packagesDirectoryNode;
+	int64 changeCount;
+	BPackageInfoSet activePackages;
+	BPackageInfoSet inactivePackages;
+	if ((error = reply.FindInt32("base directory device", &baseDirectoryDevice))
+			!= B_OK
+		|| (error = reply.FindInt64("base directory node", &baseDirectoryNode))
+			!= B_OK
+		|| (error = reply.FindInt32("packages directory device",
+			&packagesDirectoryDevice)) != B_OK
+		|| (error = reply.FindInt64("packages directory node",
+			&packagesDirectoryNode)) != B_OK
+		|| (error = _ExtractPackageInfoSet(reply, "active packages",
+			activePackages)) != B_OK
+		|| (error = _ExtractPackageInfoSet(reply, "inactive packages",
+			inactivePackages)) != B_OK
+		|| (error = reply.FindInt64("change count", &changeCount)) != B_OK) {
+		return error;
+	}
+
+	_info.Unset();
+	_info.SetLocation(location);
+	_info.SetBaseDirectoryRef(node_ref(baseDirectoryDevice, baseDirectoryNode));
+	_info.SetPackagesDirectoryRef(
+		node_ref(packagesDirectoryDevice, packagesDirectoryNode));
+	_info.SetActivePackageInfos(activePackages);
+	_info.SetInactivePackageInfos(inactivePackages);
+	_info.SetChangeCount(changeCount);
+
+	return B_OK;
+}
+
+
+status_t
+BDaemonClient::_InitMessenger()
+{
+	if (fDaemonMessenger.IsValid())
+		return B_OK;
+
+		// get the package daemon's address
+	status_t error;
+	fDaemonMessenger = BMessenger(B_PACKAGE_DAEMON_APP_SIGNATURE, -1, &error);
+	return error;
+}
+
+
+status_t
+BDaemonClient::_ExtractPackageInfoSet(const BMessage& message,
+	const char* field, BPackageInfoSet& _infos)
+{
+	// get the number of items
+	type_code type;
+	int32 count;
+	if (message.GetInfo(field, &type, &count)) {
+		// the field is missing
+		return B_OK;
+	}
+	if (type != B_MESSAGE_TYPE)
+		return B_BAD_DATA;
+
+	for (int32 i = 0; i < count; i++) {
+		BMessage archive;
+		status_t error = message.FindMessage(field, i, &archive);
+		if (error != B_OK)
+			return error;
+
+		BPackageInfo info(&archive, &error);
+		if (error != B_OK)
+			return error;
+
+		error = _infos.AddInfo(info);
+		if (error != B_OK)
+			return error;
+	}
+
+	return B_OK;
+}
+
+
+}	// namespace BPrivate
+}	// namespace BPackageKit

src/kits/package/Jamfile

@@ -51,6 +51,7 @@ SharedLibrary libpackage.so
 	BlockBufferCacheNoLock.cpp
 	ChecksumAccessors.cpp
 	Context.cpp
+	DaemonClient.cpp
 	DropRepositoryRequest.cpp
 	FetchFileJob.cpp
 	InstallationLocationInfo.cpp

src/kits/package/PackageRoster.cpp

@@ -19,6 +19,7 @@
 #include <String.h>
 #include <StringList.h>
 
+#include <package/InstallationLocationInfo.h>
 #include <package/PackageInfo.h>
 #include <package/PackageInfoContentHandler.h>
 #include <package/PackageInfoSet.h>
@@ -28,7 +29,7 @@
 #include <package/hpkg/PackageReader.h>
 
 #if defined(__HAIKU__) && !defined(HAIKU_HOST_PLATFORM_HAIKU)
-#	include <package/PackageDaemonDefs.h>
+#	include <package/DaemonClient.h>
 #endif
 
 
@@ -188,6 +189,21 @@ BPackageRoster::GetRepositoryConfig(const BString& name,
 }
 
 
+status_t
+BPackageRoster::GetInstallationLocationInfo(
+	BPackageInstallationLocation location, BInstallationLocationInfo& _info)
+{
+// This method makes sense only on an installed Haiku, but not for the build
+// tools.
+#if defined(__HAIKU__) && !defined(HAIKU_HOST_PLATFORM_HAIKU)
+	return BPackageKit::BPrivate::BDaemonClient().GetInstallationLocationInfo(
+		location, _info);
+#else
+	return B_NOT_SUPPORTED;
+#endif
+}
+
+
 status_t
 BPackageRoster::GetActivePackages(BPackageInstallationLocation location,
 	BPackageInfoSet& packageInfos)
@@ -195,67 +211,12 @@ BPackageRoster::GetActivePackages(BPackageInstallationLocation location,
 // This method makes sense only on an installed Haiku, but not for the build
 // tools.
 #if defined(__HAIKU__) && !defined(HAIKU_HOST_PLATFORM_HAIKU)
-	// check the given location
-	directory_which packagesDirectory;
-	switch (location) {
-		case B_PACKAGE_INSTALLATION_LOCATION_SYSTEM:
-			packagesDirectory = B_SYSTEM_PACKAGES_DIRECTORY;
-			break;
-		case B_PACKAGE_INSTALLATION_LOCATION_COMMON:
-			packagesDirectory = B_COMMON_PACKAGES_DIRECTORY;
-			break;
-		case B_PACKAGE_INSTALLATION_LOCATION_HOME:
-			packagesDirectory = B_USER_PACKAGES_DIRECTORY;
-			break;
-		default:
-			return B_BAD_VALUE;
-	}
-
-	// get the package daemon's address
-	status_t error;
-	BMessenger messenger(PACKAGE_DAEMON_APP_SIGNATURE, -1, &error);
+	BInstallationLocationInfo info;
+	status_t error = GetInstallationLocationInfo(location, info);
 	if (error != B_OK)
 		return error;
 
-	// request a list of packages
-	BMessage request(BPackageKit::BPrivate::MESSAGE_GET_PACKAGES);
-	error = request.AddInt32("location", location);
-	if (error != B_OK)
-		return error;
-
-	BMessage reply;
-	messenger.SendMessage(&request, &reply);
-	if (reply.what != BPackageKit::BPrivate::MESSAGE_GET_PACKAGES_REPLY)
-		return B_ERROR;
-
-	// find and open the packages directory
-	BPath packagesDirPath;
-	error = find_directory(packagesDirectory, &packagesDirPath);
-	if (error != B_OK)
-		return error;
-
-	// iterate through the packages
-	const char* packageFileName;
-	for (int32 i = 0;
-		reply.FindString("active packages", i, &packageFileName) == B_OK; i++) {
-		// get the full package file path
-		BPath packagePath;
-		error = packagePath.SetTo(packagesDirPath.Path(), packageFileName);
-		if (error != B_OK)
-			continue;
-
-		// read the package info from the file
-		BPackageInfo info;
-		error = info.ReadFromPackageFile(packagePath.Path());
-		if (error != B_OK || info.InitCheck() != B_OK)
-			continue;
-
-		// add the info
-		error = packageInfos.AddInfo(info);
-		if (error != B_OK)
-			return error;
-	}
-
+	packageInfos = info.ActivePackageInfos();
 	return B_OK;
 #else
 	return B_NOT_SUPPORTED;

src/servers/package/PackageDaemon.cpp

@@ -16,7 +16,7 @@
 #include <NodeMonitor.h>
 
 #include <AutoDeleter.h>
-#include <package/PackageDaemonDefs.h>
+#include <package/DaemonDefs.h>
 
 #include "DebugSupport.h"
 #include "Root.h"
@@ -28,7 +28,7 @@ using namespace BPackageKit::BPrivate;
 
 PackageDaemon::PackageDaemon(status_t* _error)
 	:
-	BServer(PACKAGE_DAEMON_APP_SIGNATURE, false, _error),
+	BServer(B_PACKAGE_DAEMON_APP_SIGNATURE, false, _error),
 	fSystemRoot(NULL),
 	fRoots(10, true),
 	fVolumeWatcher()
@@ -85,12 +85,12 @@ PackageDaemon::MessageReceived(BMessage* message)
 			break;
 		}
 
-		case MESSAGE_GET_PACKAGES:
+		case B_MESSAGE_GET_INSTALLATION_LOCATION_INFO:
 		{
 			if (fSystemRoot == NULL)
 				break;
 
-			fSystemRoot->HandleGetPackagesRequest(DetachCurrentMessage());
+			fSystemRoot->HandleGetLocationInfoRequest(DetachCurrentMessage());
 			break;
 		}
 

src/servers/package/Root.cpp

@@ -42,11 +42,11 @@ private:
 };
 
 
-// #pragma mark - VolumeJob
+// #pragma mark - HandleGetLocationInfoRequestJob
 
 
-struct Root::HandleGetPackagesJob : public Job {
-	HandleGetPackagesJob(Root* root, BMessage* message)
+struct Root::HandleGetLocationInfoRequestJob : public Job {
+	HandleGetLocationInfoRequestJob(Root* root, BMessage* message)
 		:
 		fRoot(root),
 		fMessage(message)
@@ -55,7 +55,7 @@ struct Root::HandleGetPackagesJob : public Job {
 
 	virtual void Do()
 	{
-		fRoot->_HandleGetPackagesRequest(fMessage.Get());
+		fRoot->_HandleGetLocationInfoRequest(fMessage.Get());
 	}
 
 private:
@@ -209,10 +209,10 @@ Root::FindVolume(dev_t deviceID) const
 
 
 void
-Root::HandleGetPackagesRequest(BMessage* message)
+Root::HandleGetLocationInfoRequest(BMessage* message)
 {
-	HandleGetPackagesJob* job
-		= new(std::nothrow) HandleGetPackagesJob(this, message);
+	HandleGetLocationInfoRequestJob* job
+		= new(std::nothrow) HandleGetLocationInfoRequestJob(this, message);
 	if (job == NULL) {
 		delete message;
 		return;
@@ -314,7 +314,7 @@ Root::_ProcessNodeMonitorEvents(Volume* volume)
 
 
 void
-Root::_HandleGetPackagesRequest(BMessage* message)
+Root::_HandleGetLocationInfoRequest(BMessage* message)
 {
 	int32 location;
 	if (message->FindInt32("location", &location) != B_OK
@@ -341,7 +341,7 @@ Root::_HandleGetPackagesRequest(BMessage* message)
 	}
 
 	if (volume != NULL)
-		volume->HandleGetPackagesRequest(message);
+		volume->HandleGetLocationInfoRequest(message);
 }
 
 

src/servers/package/Root.h

@@ -41,7 +41,7 @@ public:
 
 			Volume*				FindVolume(dev_t deviceID) const;
 
-			void				HandleGetPackagesRequest(BMessage* message);
+			void				HandleGetLocationInfoRequest(BMessage* message);
 
 private:
 	// Volume::Listener
@@ -52,9 +52,9 @@ protected:
 
 private:
 			struct VolumeJob;
-			struct HandleGetPackagesJob;
+			struct HandleGetLocationInfoRequestJob;
 
-			friend struct HandleGetPackagesJob;
+			friend struct HandleGetLocationInfoRequestJob;
 
 private:
 			Volume**			_GetVolume(PackageFSMountType mountType);
@@ -63,7 +63,8 @@ private:
 			void				_InitPackages(Volume* volume);
 			void				_DeleteVolume(Volume* volume);
 			void				_ProcessNodeMonitorEvents(Volume* volume);
-			void				_HandleGetPackagesRequest(BMessage* message);
+			void				_HandleGetLocationInfoRequest(
+									BMessage* message);
 
 			status_t			_QueueJob(Job* job);
 

src/servers/package/Volume.cpp

@@ -30,7 +30,7 @@
 
 #include <AutoDeleter.h>
 #include <AutoLocker.h>
-#include <package/PackageDaemonDefs.h>
+#include <package/DaemonDefs.h>
 #include <package/PackagesDirectoryDefs.h>
 
 #include "DebugSupport.h"
@@ -104,7 +104,9 @@ Volume::Volume(BLooper* looper)
 	fPendingNodeMonitorEventsLock("pending node monitor events"),
 	fPendingNodeMonitorEvents(),
 	fPackagesToBeActivated(),
-	fPackagesToBeDeactivated()
+	fPackagesToBeDeactivated(),
+	fChangeCount(0),
+	fLocationInfoReply(B_MESSAGE_GET_INSTALLATION_LOCATION_INFO_REPLY)
 {
 	looper->AddHandler(this);
 }
@@ -335,20 +337,49 @@ INFORM("Volume::InitialVerify(%p, %p)\n", nextVolume, nextNextVolume);
 
 
 void
-Volume::HandleGetPackagesRequest(BMessage* message)
+Volume::HandleGetLocationInfoRequest(BMessage* message)
 {
-	BMessage reply(MESSAGE_GET_PACKAGES_REPLY);
+	// If the cached reply message is up-to-date, just send it.
+	int64 changeCount;
+	if (fLocationInfoReply.FindInt64("change count", &changeCount) == B_OK
+		&& changeCount == fChangeCount) {
+		message->SendReply(&fLocationInfoReply, (BHandler*)NULL,
+			kCommunicationTimeout);
+		return;
+	}
+
+	// rebuild the reply message
+	fLocationInfoReply.MakeEmpty();
+
+	if (fLocationInfoReply.AddInt32("base directory device",
+			fRootDirectoryRef.device) != B_OK
+		|| fLocationInfoReply.AddInt64("base directory node",
+			fRootDirectoryRef.node) != B_OK
+		|| fLocationInfoReply.AddInt32("packages directory device",
+			fPackagesDirectoryRef.device) != B_OK
+		|| fLocationInfoReply.AddInt64("packages directory node",
+			fPackagesDirectoryRef.node) != B_OK) {
+		return;
+	}
 
 	for (PackageFileNameHashTable::Iterator it
 			= fPackagesByFileName.GetIterator(); it.HasNext();) {
 		Package* package = it.Next();
 		const char* fieldName = package->IsActive()
 			? "active packages" : "inactive packages";
-		if (reply.AddString(fieldName, package->FileName()) != B_OK)
+		BMessage packageArchive;
+		if (package->Info().Archive(&packageArchive) != B_OK
+			|| fLocationInfoReply.AddMessage(fieldName, &packageArchive)
+				!= B_OK) {
 			return;
+		}
 	}
 
-	message->SendReply(&reply, (BHandler*)NULL, kCommunicationTimeout);
+	if (fLocationInfoReply.AddInt64("change count", fChangeCount) != B_OK)
+		return;
+
+	message->SendReply(&fLocationInfoReply, (BHandler*)NULL,
+		kCommunicationTimeout);
 }
 
 
@@ -514,6 +545,7 @@ fPackagesToBeActivated.size(), fPackagesToBeDeactivated.size());
 	for (PackageSet::iterator it = fPackagesToBeActivated.begin();
 		it != fPackagesToBeActivated.end(); ++it) {
 		(*it)->SetActive(true);
+		fChangeCount++;
 	}
 
 	for (PackageSet::iterator it = fPackagesToBeDeactivated.begin();
@@ -671,8 +703,7 @@ INFORM("Volume::_PackagesEntryCreated(\"%s\")\n", name);
 		return;
 	}
 
-	fPackagesByFileName.Insert(package);
-	fPackagesByNodeRef.Insert(package);
+	_AddPackage(package);
 	packageDeleter.Detach();
 
 	try {
@@ -731,11 +762,19 @@ Volume::_FillInActivationChangeItem(PackageFSActivationChangeItem* item,
 }
 
 
+void
+Volume::_AddPackage(Package* package)
+{
+	fPackagesByFileName.Insert(package);
+	fPackagesByNodeRef.Insert(package);
+}
+
 void
 Volume::_RemovePackage(Package* package)
 {
 	fPackagesByFileName.Remove(package);
 	fPackagesByNodeRef.Remove(package);
+	fChangeCount++;
 }
 
 
@@ -762,8 +801,7 @@ Volume::_ReadPackagesDirectory()
 
 		status_t error = package->Init(entry);
 		if (error == B_OK) {
-			fPackagesByFileName.Insert(package);
-			fPackagesByNodeRef.Insert(package);
+			_AddPackage(package);
 			packageDeleter.Detach();
 		}
 	}

src/servers/package/Volume.h

@@ -13,6 +13,7 @@
 
 #include <Handler.h>
 #include <Locker.h>
+#include <Message.h>
 #include <String.h>
 
 #include <package/packagefs.h>
@@ -48,7 +49,7 @@ public:
 									bool activeOnly);
 			void				InitialVerify(Volume* nextVolume,
 									Volume* nextNextVolume);
-			void				HandleGetPackagesRequest(BMessage* message);
+			void				HandleGetLocationInfoRequest(BMessage* message);
 
 			void				Unmounted();
 
@@ -105,6 +106,8 @@ private:
 									PackageFSActivationChangeItem* item,
 									PackageFSActivationChangeType type,
 									Package* package, char*& nameBuffer);
+
+			void				_AddPackage(Package* package);
 			void				_RemovePackage(Package* package);
 
 			status_t			_ReadPackagesDirectory();
@@ -133,6 +136,8 @@ private:
 			NodeMonitorEventList fPendingNodeMonitorEvents;
 			PackageSet			fPackagesToBeActivated;
 			PackageSet			fPackagesToBeDeactivated;
+			int64				fChangeCount;
+			BMessage			fLocationInfoReply;
 };