tc: gred: Print usage text if no arguments appear after "gred"

This is more helpful to the user, since the command takes two forms,
and the message that would otherwise appear about missing parameters
assumes one of those forms.

Signed-off-by: David Ward <david.ward@ll.mit.edu>

diff --git a/tc/q_gred.c b/tc/q_gred.c
index a3dc722b60ce3f0a25ed4f0c903e208e26306bc4..65caeee6fb0587316fd8b5a86ea8ce68c12723ed 100644 (file)
--- a/tc/q_gred.c
+++ b/tc/q_gred.c
@@ -213,6 +213,10 @@ static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct n
                argc--; argv++;
        }
 
+       if (!ok) {
+               explain();
+               return -1;
+       }
        if (!opt.qth_min || !opt.qth_max || !opt.limit || !avpkt ||
            (opt.DP<0)) {
                fprintf(stderr, "Required parameter (min, max, limit, "