package daemon: Fix handling of multiple writable files

When attempting to extract the second writable file from the package,
we noticed that the root directory already existed and assumed
everything had been already extracted. Now we first extract all files
and process them one by one afterwards. Fixes #10131.

src/servers/package/Volume.cpp

@@ -512,12 +512,7 @@ struct Volume::CommitTransactionHandler {
 			_AddUser(package, *user);
 
 		// handle global writable files
-		const BObjectList<BGlobalWritableFileInfo>& files
-			= package->Info().GlobalWritableFileInfos();
-		for (int32 i = 0; const BGlobalWritableFileInfo* file = files.ItemAt(i);
-			i++) {
-			_AddGlobalWritableFile(package, *file);
-		}
+		_AddGlobalWritableFiles(package);
 	}
 
 	void _AddGroup(Package* package, const BString& groupName)
@@ -612,10 +607,19 @@ struct Volume::CommitTransactionHandler {
 		}
 	}
 
-	void _AddGlobalWritableFile(Package* package,
-		const BGlobalWritableFileInfo& file)
+	void _AddGlobalWritableFiles(Package* package)
 	{
-		if (!file.IsIncluded())
+		// get the list of included files
+		const BObjectList<BGlobalWritableFileInfo>& files
+			= package->Info().GlobalWritableFileInfos();
+		BStringList contentPaths;
+		for (int32 i = 0; const BGlobalWritableFileInfo* file = files.ItemAt(i);
+			i++) {
+			if (file->IsIncluded() && !contentPaths.Add(file->Path()))
+				throw std::bad_alloc();
+		}
+
+		if (contentPaths.IsEmpty())
 			return;
 
 		// Open the root directory of the installation location where we will
@@ -645,9 +649,22 @@ struct Volume::CommitTransactionHandler {
 
 		// extract files into a subdir of the writable-files directory
 		BDirectory extractedFilesDirectory;
-		_ExtractPackageContent(package, file.Path(),
+		_ExtractPackageContent(package, contentPaths,
 			fWritableFilesDirectory, extractedFilesDirectory);
 
+		for (int32 i = 0; const BGlobalWritableFileInfo* file = files.ItemAt(i);
+			i++) {
+			if (file->IsIncluded()) {
+				_AddGlobalWritableFile(package, *file, rootDirectory,
+					extractedFilesDirectory);
+			}
+		}
+	}
+
+	void _AddGlobalWritableFile(Package* package,
+		const BGlobalWritableFileInfo& file, const BDirectory& rootDirectory,
+		const BDirectory& extractedFilesDirectory)
+	{
 		// Map the path name to the actual target location. Currently this only
 		// concerns "settings/", which is mapped to "settings/global/".
 		BString targetPath(file.Path());
@@ -662,7 +679,7 @@ struct Volume::CommitTransactionHandler {
 
 		// open parent directory of the source entry
 		const char* lastSlash = strrchr(file.Path(), '/');
-		BDirectory* sourceDirectory;
+		const BDirectory* sourceDirectory;
 		BDirectory stackSourceDirectory;
 		if (lastSlash != NULL) {
 			sourceDirectory = &stackSourceDirectory;
@@ -671,8 +688,8 @@ struct Volume::CommitTransactionHandler {
 			if (sourceParentPath.Length() == 0)
 				throw std::bad_alloc();
 
-			error = stackSourceDirectory.SetTo(&extractedFilesDirectory,
-				sourceParentPath);
+			status_t error = stackSourceDirectory.SetTo(
+				&extractedFilesDirectory, sourceParentPath);
 			if (error != B_OK) {
 				throw Exception(error,
 					BString().SetToFormat("failed to open directory \"%s\"",
@@ -696,7 +713,7 @@ struct Volume::CommitTransactionHandler {
 				throw std::bad_alloc();
 
 			BDirectory targetDirectory;
-			error = FSUtils::OpenSubDirectory(rootDirectory,
+			status_t error = FSUtils::OpenSubDirectory(rootDirectory,
 				RelativePath(targetParentPath), true, targetDirectory);
 			if (error != B_OK) {
 				throw Exception(error,
@@ -718,8 +735,8 @@ struct Volume::CommitTransactionHandler {
 	}
 
 	void _AddGlobalWritableFileRecurse(Package* package,
-		BDirectory& sourceDirectory, FSUtils::Path& relativeSourcePath,
-		BDirectory& targetDirectory, const char* targetName,
+		const BDirectory& sourceDirectory, FSUtils::Path& relativeSourcePath,
+		const BDirectory& targetDirectory, const char* targetName,
 		BWritableFileUpdateType updateType)
 	{
 		// * If the file doesn't exist, just copy the extracted one.
@@ -1115,8 +1132,9 @@ struct Volume::CommitTransactionHandler {
 		return path.IsEmpty() ? fallback : path;
 	}
 
-	void _ExtractPackageContent(Package* package, const char* contentPath,
-		BDirectory& targetDirectory, BDirectory& _extractedFilesDirectory)
+	void _ExtractPackageContent(Package* package,
+		const BStringList& contentPaths, BDirectory& targetDirectory,
+		BDirectory& _extractedFilesDirectory)
 	{
 		// check whether the subdirectory already exists
 		BString targetName(package->RevisionedNameThrows());
@@ -1199,13 +1217,18 @@ struct Volume::CommitTransactionHandler {
 		NotOwningEntryRef packageRef(fVolume->fPackagesDirectoryRef,
 			package->FileName());
 
-		error = FSUtils::ExtractPackageContent(FSUtils::Entry(packageRef),
-			contentPath, FSUtils::Entry(subDirectory));
-		if (error != B_OK) {
-			throw Exception(error,
-				BString().SetToFormat("failed to extract \"%s\" from package",
-					contentPath),
-				package->FileName());
+		int32 contentPathCount = contentPaths.CountStrings();
+		for (int32 i = 0; i < contentPathCount; i++) {
+			const char* contentPath = contentPaths.StringAt(i);
+
+			error = FSUtils::ExtractPackageContent(FSUtils::Entry(packageRef),
+				contentPath, FSUtils::Entry(subDirectory));
+			if (error != B_OK) {
+				throw Exception(error,
+					BString().SetToFormat(
+						"failed to extract \"%s\" from package", contentPath),
+					package->FileName());
+			}
 		}
 
 		// tag all entries with the package attribute