netdev - [PATCH] iproute: disallow ip rule del without parameters

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Date:   Wed, 24 Aug 2016 23:43:00 +0300
From:   "Andrey Jr. Melnikov" <temnota.am@...il.com>
To:     Stephen Hemminger <shemminger@...l.org>
Cc:     netdev@...r.kernel.org
Subject: [PATCH] iproute: disallow ip rule del without parameters

Disallow run `ip rule del` without any parameter to avoid delete any first
rule from table.

Signed-off-by: Andrey Jr. Melnikov <temnota.am@...il.com>
---

diff --git a/ip/iprule.c b/ip/iprule.c
index 8f24206..70562c5 100644
--- a/ip/iprule.c
+++ b/ip/iprule.c
@@ -346,6 +346,11 @@ static int iprule_modify(int cmd, int argc, char **argv)
 		req.r.rtm_type = RTN_UNICAST;
 	}

+	if (cmd == RTM_DELRULE && argc == 0) {
+		fprintf(stderr, "\"ip rule del\" requires arguments.\n");
+		return -1;
+	}
+
 	while (argc > 0) {
 		if (strcmp(*argv, "not") == 0) {
 			req.r.rtm_flags |= FIB_RULE_INVERT;