we should check invalite parameter, and then print a warning

v2:
        change print info format. This is suggested
by Dhaval Giani <dhaval.gi...@gmail.com>

Signed-off-by: Libo Chen <clbchenlibo.c...@huawei.com>
---
 src/tools/cgconfig.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/tools/cgconfig.c b/src/tools/cgconfig.c
index b205d1b..76aee94 100644
--- a/src/tools/cgconfig.c
+++ b/src/tools/cgconfig.c
@@ -140,6 +140,13 @@ int main(int argc, char *argv[])
                }
        }

+       if (argv[optind]) {
+               fprintf(stderr, "%s: illegal option -- %s\n",
+                       argv[0], argv[optind]);
+               usage(argv[0]);
+               goto err;
+       }
+
        /* set default permissions */
        default_group = cgroup_new_cgroup("default");
        if (!default_group) {
-- 
1.7.1


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