From 04d5638c0268f68eaba25392d15b0b3fb576b28b Mon Sep 17 00:00:00 2001 From: "tim.schubert@tu-bs.de" Date: Sun, 30 Oct 2016 00:12:16 +0200 Subject: [PATCH] Add help message. --- netcalc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/netcalc.c b/netcalc.c index 06a25bc..df9acb1 100644 --- a/netcalc.c +++ b/netcalc.c @@ -281,10 +281,15 @@ int main(int argc, char *argv[]) if (argc > 1 && strcmp(argv[1], "-c") == 0) { CLIENT = 1; // client mode - if (argc > 3) { + if (argc > 2) { host = argv[2]; - port = argv[3]; + if (argc > 3) { + port = argv[3]; + } } + } else if (argc > 1 && strcmp(argv[1], "-h") == 0) { + printf("usage: netcalc [-c hostname] [port]\n"); + return 0; } else { CLIENT = 0; afamiliy = AF_INET6;