The code implements these two bindings like this:
if (ctrl && meta && (keysym == XK_c || keysym == XK_v))
if (keysym == XK_v)
selection_request (ev.time, Sel_Clipboard);
else if (selection.len > 0)
selection.clip_text = rxvt_wcsdup (selection.text, selection.len);
selection.clip_len = selection.len;
selection_grab (CurrentTime, true);
You cannot use the
keysym resource to rebind something else, since that only maps to strings (no modifiers such as control and alt).
However, you could use the Perl extension, which has methods for working with selections. But you'd have to write a Perl script to tie those together.