winedos: Open files with write access on read only media.

If the CreateFile in INT21_CreateFile fails with ERROR_WRITE_PROTECT, retry without write access.

winedos: Open files with write access on read only media.
43694d95 · Rein Klazes · Alexandre Julliard · d82af6f7 · 43694d95
Commit 43694d95 authored Jan 10, 2006 by Rein Klazes Committed by Alexandre Julliard Jan 10, 2006
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int21.c dlls/winedos/int21.c +6 -0

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--- a/dlls/winedos/int21.c
+++ b/dlls/winedos/int21.c
@@ -1090,6 +1090,12 @@ static BOOL INT21_CreateFile( CONTEXT86 *context,
    {
        winHandle = CreateFileW( pathW, winAccess, winSharing, NULL,
                                 winMode, winAttributes, 0 );
+        /* DOS allows to open files on a CDROM R/W */
+        if( winHandle == INVALID_HANDLE_VALUE &&
+                GetLastError()== ERROR_WRITE_PROTECT) {
+            winHandle = CreateFileW( pathW, winAccess & ~GENERIC_WRITE,
+                    winSharing, NULL, winMode, winAttributes, 0 );
+        }

        if (winHandle == INVALID_HANDLE_VALUE)
            return FALSE;