(sys_chown): New function.

src/w32.c

@@ -1897,6 +1897,14 @@ sys_chmod (const char * path, int mode)
   return _chmod (map_w32_filename (path, NULL), mode);
 }
 
+int
+sys_chown (const char *path, uid_t owner, gid_t group)
+{
+  if (sys_chmod (path, _S_IREAD) == -1) /* check if file exists */
+    return -1;
+  return 0;
+}
+
 int
 sys_creat (const char * path, int mode)
 {