From f114bcedd113017d907aad32031db92c050f4bf3 Mon Sep 17 00:00:00 2001 From: sasha Date: Sun, 27 Jul 2025 05:43:47 +0000 Subject: [PATCH] Eat up "CSI 58" sequences This is used in the wild by systemd systemctl for example and st misinterpreted it as "blink", because it didn't know "58", then saw "5" as "blink", and then didn't know "245". This should print "foo" as normal text: printf '\e[58:5:245mfoo\n' printf '\e[58:2:50:100:200mfoo\n' --- st.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/st.c b/st.c index 03b9bc8..37f38c5 100644 --- a/st.c +++ b/st.c @@ -1430,6 +1430,12 @@ tsetattr(const int *attr, int l) case 49: term.c.attr.bg = defaultbg; break; + case 58: + /* This starts a sequence to change the color of + * "underline" pixels. We don't support that and + * instead eat up a following "5;n" or "2;r;g;b". */ + tdefcolor(attr, &i, l); + break; default: if (BETWEEN(attr[i], 30, 37)) { term.c.attr.fg = attr[i] - 30; -- 2.50.0