[CRIU] [PATCH] zdtm: Make sure the root dirs are not present

[Cyrill Gorcunov]

When creating root for NS testing we should make
sure that directories we're about to create are
not present (created already). For this sake
use os.access helper.

With this patch I can run test on my local machine.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
Andrew, does it make sense?

 test/zdtm.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/test/zdtm.py b/test/zdtm.py
index 1ace91953667..7e93d5b977f3 100755
--- a/test/zdtm.py
+++ b/test/zdtm.py
@@ -161,8 +161,9 @@ class ns_flavor:
 
 	def __construct_root(self):
 		for dir in self.__root_dirs:
-			os.mkdir(self.root + dir)
-			os.chmod(self.root + dir, 0777)
+			if not os.access(self.root + dir, os.F_OK):
+				os.mkdir(self.root + dir)
+				os.chmod(self.root + dir, 0777)
 
 		for ldir in [ "/bin", "/sbin", "/lib", "/lib64" ]:
 			os.symlink(".." + ldir, self.root + "/usr" + ldir)
-- 
2.5.0