Merge pull request #4647 from SmileTheory/lfn_wrong_filesize

DOS_Int21_71a6(): Report correct file size on win32 when file is open.
joncampbell123 · Dec 2, 2023 · 406ac94 · 406ac94
2 parents 505231b + ac084fe
commit 406ac94
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/src/dos/dos.cpp b/src/dos/dos.cpp
@@ -5352,6 +5352,19 @@ void DOS_Int21_71a6(const char *name1, const char *name2) {
 			if(status.st_mode & S_IFDIR) st = DOS_ATTR_DIRECTORY;
 			else st = DOS_ATTR_ARCHIVE;
 
+			/* Win32 stat() will not return the correct file size of a file open for writing */
+#if defined (WIN32)
+			if (Files[handle]->IsOpen())
+			{
+				Files[handle]->Flush();
+				uint32_t oldPos = Files[handle]->GetSeekPos();
+				uint32_t newPos = 0;
+				Files[handle]->Seek(&newPos, DOS_SEEK_END);
+				status.st_size = Files[handle]->GetSeekPos();
+				Files[handle]->Seek(&oldPos, DOS_SEEK_SET);
+			}
+#endif
+
 			memset(buf, 0, 52);
 			set_dword(buf, st);
 			// 116444736000000000LL = FILETIME 1970/01/01 00:00:00