can-utils: canfdtest, a full duplex test to find out-of-order messages

[sojka/can-utils.git] / isotptun.c

diff --git a/isotptun.c b/isotptun.c
index 5fca673703abd7201ef08d61325fd661bfb407df..d40df87cb88e662697be8f19ba721f409e1f6763 100644 (file)
--- a/isotptun.c
+++ b/isotptun.c
@@ -111,7 +111,7 @@ int main(int argc, char **argv)
 
        addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
 
-       while ((opt = getopt(argc, argv, "s:d:x:p:q:P:t:b:m:whv")) != -1) {
+       while ((opt = getopt(argc, argv, "s:d:x:p:q:P:t:b:m:whv?")) != -1) {
                switch (opt) {
                case 's':
                        addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
@@ -178,10 +178,15 @@ int main(int argc, char **argv)
                        verbose = 1;
                        break;
 
+               case '?':
+                       print_usage(basename(argv[0]));
+                       exit(0);
+                       break;
+
                default:
                        fprintf(stderr, "Unknown option %c\n", opt);
                        print_usage(basename(argv[0]));
-                       exit(0);
+                       exit(1);
                        break;
                }
        }
@@ -190,7 +195,7 @@ int main(int argc, char **argv)
            (addr.can_addr.tp.tx_id == NO_CAN_ID) ||
            (addr.can_addr.tp.rx_id == NO_CAN_ID)) {
                print_usage(basename(argv[0]));
-               exit(0);
+               exit(1);
        }
   
        if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {