Add safety assert in parse_movement_unit

Let's add this just in case a caller passes argc == 0. References: #6737 (comment)
swaywm · Jan 9, 2022 · 6cb69a4 · 6cb69a4
1 parent e2b4c57
commit 6cb69a4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/common/util.c b/common/util.c
@@ -80,6 +80,12 @@ enum movement_unit parse_movement_unit(const char *unit) {
 
 int parse_movement_amount(int argc, char **argv,
 		struct movement_amount *amount) {
+	if (!sway_assert(argc > 0, "Expected args in parse_movement_amount")) {
+		amount->amount = 0;
+		amount->unit = MOVEMENT_UNIT_INVALID;
+		return 0;
+	}
+
 	char *err;
 	amount->amount = (int)strtol(argv[0], &err, 10);
 	if (*err) {