Qt: Add a permission error dialog when converting memorycards in a R/O directory

.github/workflows/scripts/linux/build-dependencies-qt.sh

@@ -51,7 +51,7 @@ aa27e4454ce631c5a17924ce0624eac736da19fc6f5a2ab15a6c58da7b36950f  shaderc-glslan
 03ee1a2c06f3b61008478f4abe9423454e53e580b9488b47c8071547c6a9db47  shaderc-spirv-tools-$SHADERC_SPIRVTOOLS.tar.gz
 EOF
 
-curl -C - -L \
+curl -L \
 	-O "https://github.com/ianlancetaylor/libbacktrace/archive/$LIBBACKTRACE.zip" \
 	-O "https://ijg.org/files/jpegsrc.v$LIBJPEG.tar.gz" \
 	-O "https://downloads.sourceforge.net/project/libpng/libpng16/$LIBPNG/libpng-$LIBPNG.tar.xz" \

pcsx2-qt/Settings/MemoryCardConvertDialog.cpp

@@ -8,6 +8,7 @@
 #include <QtWidgets/QProgressDialog>
 
 #include "common/Console.h"
+#include "common/Error.h"
 #include "common/Path.h"
 #include "common/StringUtil.h"
 
@@ -262,6 +263,21 @@ void MemoryCardConvertDialog::ConvertCard()
 			destName.append(StringUtil::StdStringFromFormat("_%02zd.ps2", ++num).c_str());
 		}
 
+		// Check if we have write permission in the memory card directory
+		const std::string destPath = Path::Combine(EmuFolders::MemoryCards, destName.toStdString());
+		Error error;
+		FILE* tmpFile = FileSystem::OpenCFile(destPath.c_str(), "w", &error);
+		if (tmpFile == nullptr)
+		{
+			FileOpenError(error.GetDescription().c_str());
+			return;
+		}
+		else
+		{
+			fclose(tmpFile);
+			FileSystem::DeleteFilePath(destPath.c_str());
+		}
+
 		m_destCardName = destName;
 		StartThread();
 	}
@@ -303,3 +319,8 @@ void MemoryCardConvertDialog::SetType_Folder()
 {
 	SetType(MemoryCardType::Folder, MemoryCardFileType::Unknown, tr("Uses a folder on your PC filesystem, instead of a file. Infinite capacity, while keeping the same compatibility as an 8 MB Memory Card."));
 }
+
+void MemoryCardConvertDialog::FileOpenError(const QString errmsg)
+{
+	QMessageBox::critical(this, tr("Cannot Convert Memory Card"),tr("There was an error when accessing the memory card directory. Error message: %0").arg(errmsg));
+}

pcsx2-qt/Settings/MemoryCardConvertDialog.h

@@ -41,6 +41,7 @@ private:
 	void SetType_32();
 	void SetType_64();
 	void SetType_Folder();
+	void FileOpenError(const QString errmsg);
 	
 	Ui::MemoryCardConvertDialog m_ui;