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ip rule: Require at least one argument for add

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'ip rule add' with no additional arguments just adds another rule
for the main table - which exists by default. Require at least
1 argument similar to delete.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
David Ahern 2018-10-30 13:59:05 -07:00 committed by Stephen Hemminger
parent b65b4c0870
commit 2380120926
1 changed files with 5 additions and 0 deletions
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5
ip/iprule.c
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@ -696,6 +696,11 @@ static int iprule_modify(int cmd, int argc, char **argv)
};
if (cmd == RTM_NEWRULE) {
if (argc == 0) {
fprintf(stderr,
"\"ip rule add\" requires arguments.\n");
return -1;
}
req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
req.frh.action = FR_ACT_TO_TBL;
}