do not allow negative -l limit.

1 files changed, 6 insertions, 1 deletions

diff --git a/uxd.c b/uxd.c
index 95a91bd..6ea3897 100644
--- a/uxd.c
+++ b/uxd.c
@@ -230,7 +230,12 @@ void parse_args(int argc, char **argv) {
 			case 'b':
 				bold = 1; break;
 			case 'l':
-				limit = parse_number(opt, optarg); break;
+				limit = parse_number(opt, optarg);
+				if(limit < 0) {
+					fprintf(stderr, "%s: negative limit for -l not allowed.\n", self);
+					exit(1);
+				}
+				break;
 			case 'r':
 				hilite_multi = 1; break;
 			case 'm':