Add some prototype UI for overwriting saves

Common/File/FileUtil.cpp

@@ -37,6 +37,9 @@
 #include <ctime>
 #include <memory>
 
+#include <sys/utime.h>
+#include <sys/types.h>
+
 #include "Common/Log.h"
 #include "Common/LogReporting.h"
 #include "Common/File/AndroidContentURI.h"
@@ -1240,4 +1243,20 @@ bool WriteDataToFile(bool text_file, const void* data, size_t size, const Path &
 	return true;
 }
 
+void ChangeMTime(const Path &path, time_t mtime) {
+	if (path.Type() == PathType::CONTENT_URI) {
+		// No clue what to do here.
+		return;
+	}
+
+	_utimbuf buf{};
+	buf.actime = mtime;
+	buf.modtime = mtime;
+#ifdef _WIN32
+	_utime(path.c_str(), &buf);
+#else
+	utime(path.c_str(), &buf);
+#endif
+}
+
 }  // namespace File

Common/File/FileUtil.h

@@ -83,6 +83,8 @@ uint64_t ComputeRecursiveDirectorySize(const Path &path);
 // Returns true if successful, or path already exists.
 bool CreateDir(const Path &filename);
 
+void ChangeMTime(const Path &path, time_t mtime);
+
 // Creates the full path of fullPath returns true on success
 bool CreateFullPath(const Path &fullPath);
 

Core/Util/GameManager.cpp

@@ -24,13 +24,15 @@
 #include <set>
 #include <sstream>
 #include <thread>
-
+#include <sys/types.h>
+#include <sys/utime.h>
 #ifdef SHARED_LIBZIP
 #include <zip.h>
 #else
 #include "ext/libzip/zip.h"
 #endif
 #ifdef _WIN32
+
 #include "Common/CommonWindows.h"
 #endif
 #include "Common/Data/Encoding/Utf8.h"
@@ -652,8 +654,14 @@ bool GameManager::ExtractFile(struct zip *z, int file_index, const Path &outFile
 			*bytesCopied += readSize;
 			installProgress_ = (float)*bytesCopied / (float)allBytes;
 		}
+
 		zip_fclose(zf);
 		fclose(f);
+
+		// Copy the mtime, too. May not be possible on Android?
+		if (zstat.mtime) {
+			File::ChangeMTime(outFilename, zstat.mtime);
+		}
 		delete[] buffer;
 		return true;
 	} else {