hiddev-test usage message

diff --git a/hostside/hiddev-test.c b/hostside/hiddev-test.c
index a0a643989f137b0c27e09124875e47d3103dde1e..d2bc01b70e9a561eb9f0164604888d88f71237c9 100644 (file)
--- a/hostside/hiddev-test.c
+++ b/hostside/hiddev-test.c
@@ -1,4 +1,6 @@
-/**/
+/*
+ * hiddev-test </dev/usb/hidddevN
+ */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -12,7 +14,7 @@
 
 #include "common.h"
 
-int main(void) {
+int main(int argc, char **argv) {
   struct hiddev_usage_ref ev;
   struct hiddev_field_info fi;
   int r, flag;
@@ -21,6 +23,8 @@ int main(void) {
   r= ioctl(0, HIDIOCSFLAG, &flag);
   if (r) diee("ioctl HIDIOCSFLAG");
 
+  if (!argv[0] || argv[1]) badusage("no arguments allowed");
+
   for (;;) {
     r= fread(&ev,1,sizeof(ev),stdin);
     if (feof(stdin)) exit(0);