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Consistencely allow '-?' to get a help text.

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This commit is contained in:
Oliver Hartkopp
2009-01-13 09:32:45 +00:00
parent 278ba6377d
commit 4369ac1c55
10 changed files with 56 additions and 19 deletions
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isotpsniffer.c
+8 -3
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@@ -193,7 +193,7 @@ int main(int argc, char **argv)
unsigned char buffer[4096];
int nbytes;
while ((opt = getopt(argc, argv, "s:d:x:h:ct:f:")) != -1) {
while ((opt = getopt(argc, argv, "s:d:x:h:ct:f:?")) != -1) {
switch (opt) {
case 's':
src = strtoul(optarg, (char **)NULL, 16);
@@ -234,17 +234,22 @@ 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;
}
}
if ((argc - optind) != 1 || src == NO_CAN_ID || dst == NO_CAN_ID) {
print_usage(basename(argv[0]));
exit(0);
exit(1);
}
if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {