we should check invalite parameter, and then print a warning

v3:
 - usage has changed, so no need of fprintf output
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 |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/tools/cgconfig.c b/src/tools/cgconfig.c
index 6ed4c77..e96ab9d 100644
--- a/src/tools/cgconfig.c
+++ b/src/tools/cgconfig.c
@@ -152,6 +152,12 @@ int main(int argc, char *argv[])
                }
        }
 
+       if (argv[optind]) {
+               usage(1, argv[0]);
+               error = -1;
+               goto err;
+       }
+
        /* set default permissions */
        default_group = cgroup_new_cgroup("default");
        if (!default_group) {
-- 
1.7.1



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