st

commit bee37615c1aaabfef11230a5f3518cc589a700f5
parent 5fbab945ac0129cfde3a6995189084572132612f
Author: Jochen Sprickerhof <git@jochen.sprickerhof.de>
Date:   Mon, 27 Dec 2021 11:41:42 +0100

Fix null pointer access in strhandle

According to the spec the argument is optional for 104, so p can be
NULL as can be tested with printf '\x1b]104\x07'. This is a regression
of f89c05f.

Diffstat:
M
st.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/st.c b/st.c
@@ -1960,10 +1960,10 @@ strhandle(void)
 				break;
 			p = strescseq.args[2];
 			/* FALLTHROUGH */
-		case 104: /* color reset, here p = NULL */
+		case 104: /* color reset */
 			j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
 
-			if (!strcmp(p, "?"))
+			if (p && !strcmp(p, "?"))
 				osc4_color_response(j);
 			else if (xsetcolorname(j, p)) {
 				if (par == 104 && narg <= 1)