We should exit with a error when starting a running container.

Signed-off-by: Dongsheng Yang <yangds.f...@cn.fujitsu.com>
---
 src/lxc/lxc_start.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lxc/lxc_start.c b/src/lxc/lxc_start.c
index e836325..9a05356 100644
--- a/src/lxc/lxc_start.c
+++ b/src/lxc/lxc_start.c
@@ -276,6 +276,10 @@ int main(int argc, char *argv[])
                }
        }
 
+       if (c->is_running(c)) {
+               ERROR("Container is already running.");
+               goto out;
+       }
        /*
         * We should use set_config_item() over &defines, which would handle
         * unset c->lxc_conf for us and let us not use lxc_config_define_load()
-- 
1.8.4.2

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