Honour the VNLP_COPYIFEXISTS flag when doing a copy operation.

dlls/setupapi/setupx16.h

@@ -360,6 +360,20 @@ typedef LRESULT (CALLBACK *VIFPROC)(LPVOID lpvObj, UINT16 uMsg, WPARAM wParam, L
 typedef int (CALLBACK *VCPENUMPROC)(LPVIRTNODE lpvn, LPARAM lparamRef);
 
 RETERR16 WINAPI VcpOpen16(VIFPROC vifproc, LPARAM lparamMsgRef);
+
+/* VcpQueueCopy flags */
+#define VNLP_SYSCRITICAL	0x0001
+#define VNLP_SETUPCRITICAL	0x0002
+#define VNLP_NOVERCHECK		0x0004
+#define VNLP_FORCETEMP		0x0008
+#define VNLP_IFEXISTS		0x0010
+#define VNLP_KEEPNEWER		0x0020
+#define VNLP_PATCHIFEXIST	0x0040
+#define VNLP_NOPATCH		0x0080
+#define VNLP_CATALOGCERT	0x0100
+#define VNLP_NEEDCERTIFY	0x0200
+#define VNLP_COPYIFEXISTS	0x0400
+
 RETERR16 WINAPI VcpQueueCopy16(
 	LPCSTR lpszSrcFileName, LPCSTR lpszDstFileName,
 	LPCSTR lpszSrcDir, LPCSTR lpszDstDir,

dlls/setupapi/virtcopy.c

@@ -467,7 +467,8 @@ RETERR16 VCP_CopyFiles(void)
 	/* FIXME: need to do the file copy in small chunks for notifications */
 	TRACE("copying '%s' to '%s'\n", fn_src, fn_dst);
         /* perform the file copy */
-        if (!(CopyFileA(fn_src, fn_dst, TRUE)))
+        if (!(CopyFileA(fn_src, fn_dst,
+	       (lpvn->fl & VNLP_COPYIFEXISTS) ? FALSE : TRUE )))
         {
             ERR("error copying, src: %s -> dst: %s\n", fn_src, fn_dst);
 	    res = ERR_VCP_IOFAIL;