Makefile: adopt to new location for kernel headers

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

diff --git a/isotpdump.c b/isotpdump.c
index c5c4de5afb703df96fe90f3e1c8489d171c203f7..3ed02df0249ceffcbccfdb13fd4f85406730df83 100644 (file)
--- a/isotpdump.c
+++ b/isotpdump.c
@@ -103,7 +103,7 @@ int main(int argc, char **argv)
        last_tv.tv_sec  = 0;
        last_tv.tv_usec = 0;
 
-       while ((opt = getopt(argc, argv, "s:d:ax:ct:")) != -1) {
+       while ((opt = getopt(argc, argv, "s:d:ax:ct:?")) != -1) {
                switch (opt) {
                case 's':
                        src = strtoul(optarg, (char **)NULL, 16);
@@ -144,10 +144,15 @@ int main(int argc, char **argv)
                        }
                        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;
                }
        }