collectd-nagios: Be more verbose before bailing out with usage().

diff --git a/src/collectd-nagios.c b/src/collectd-nagios.c
index 4e4e494..b995b1c 100644 (file)
--- a/src/collectd-nagios.c
+++ b/src/collectd-nagios.c
@@ -617,7 +617,11 @@ int main (int argc, char **argv)
                                else if (strcasecmp (optarg, "percentage") == 0)
                                        consolitation_g = CON_PERCENTAGE;
                                else
+                               {
+                                       fprintf (stderr, "Unknown consolidation function `%s'.\n",
+                                                       optarg);
                                        usage (argv[0]);
+                               }
                                break;
                        case 'd':
                        {
@@ -649,7 +653,10 @@ int main (int argc, char **argv)
 
        if ((socket_file_g == NULL) || (value_string_g == NULL)
                        || (hostname_g == NULL))
+       {
+               fprintf (stderr, "Missing required arguments.\n");
                usage (argv[0]);
+       }
 
        return (do_check ());
 } /* int main */