commit a3f7420310be0fd778ef9fe2abf20edc2d8dc81a
from: Tim Culverhouse <tim@timculverhouse.com>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Sun Feb 18 15:14:26 2024 UTC

csi: check for private marker in 'S' case

The handler for 'S' final character does not check for a private
marker. This can cause a conflict with a sequence called 'XTSMGRAPHICS'
which also has an 'S' final character, but uses the private marker '?'.
Without checking for a private marker, st will perform a scroll up
operation when XTSMGRAPHICS is seen, which can cause unexpected display
artifacts.

commit - 9846a56bd7fdc86bf788db04bbbcbde7b7eb9952
commit + a3f7420310be0fd778ef9fe2abf20edc2d8dc81a
blob - d6478f55a2498f36bc1c0fa54bdff5de94e1b114
blob + 034954d0aa83de340560498116a75930bc1b3db9
--- st.c
+++ st.c
@@ -1728,6 +1728,7 @@ csihandle(void)
 		}
 		break;
 	case 'S': /* SU -- Scroll <n> line up */
+		if (csiescseq.priv) break;
 		DEFAULT(csiescseq.arg[0], 1);
 		tscrollup(term.top, csiescseq.arg[0]);
 		break;