From 770eeeaf2316b14d56a19732de17ed83c51db3e9 Mon Sep 17 00:00:00 2001
From: Oliver Hartkopp <socketcan@hartkopp.net>
Date: Thu, 13 Mar 2008 21:52:20 +0000
Subject: [PATCH] Allow commandline option '-?' to print the help text.

---
 candump.c      | 3 +--
 canlogserver.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/candump.c b/candump.c
index 5c2a7f2..1ed2b8d 100644
--- a/candump.c
+++ b/candump.c
@@ -204,7 +204,7 @@ int main(int argc, char **argv)
     last_tv.tv_sec  = 0;
     last_tv.tv_usec = 0;
 
-    while ((opt = getopt(argc, argv, "m:v:i:e:t:cas:b:B:lL")) != -1) {
+    while ((opt = getopt(argc, argv, "m:v:i:e:t:cas:b:B:lL?")) != -1) {
 	switch (opt) {
 	case 'm':
 	    i = sscanf(optarg, "%x,%x,%x,%x,%x,%x",
@@ -304,7 +304,6 @@ int main(int argc, char **argv)
 	    break;
 
 	default:
-	    fprintf(stderr, "Unknown option %c\n", opt);
 	    print_usage(basename(argv[0]));
 	    exit(1);
 	    break;
diff --git a/canlogserver.c b/canlogserver.c
index 5a17da9..9db8c57 100644
--- a/canlogserver.c
+++ b/canlogserver.c
@@ -208,7 +208,7 @@ int main(int argc, char **argv)
     last_tv.tv_sec  = 0;
     last_tv.tv_usec = 0;
 
-    while ((opt = getopt(argc, argv, "m:v:i:e:p:")) != -1) {
+    while ((opt = getopt(argc, argv, "m:v:i:e:p:?")) != -1) {
 
 	switch (opt) {
 	case 'm':
@@ -246,7 +246,6 @@ int main(int argc, char **argv)
 	    port = atoi(optarg);
 	    break;
 	default:
-	    fprintf(stderr, "Unknown option %c\n", opt);
 	    print_usage(basename(argv[0]));
 	    exit(1);
 	    break;