[PATCH iproute2 06/10] tc: gred: Print usage text if no arguments appear after "gred"

[David Ward <david.ward@ll.mit.edu>]

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>
---
 tc/q_gred.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/tc/q_gred.c b/tc/q_gred.c
index a3dc722..65caeee 100644
--- 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, "
-- 
1.7.1