Github user Liuchang0812 commented on a diff in the pull request:
https://github.com/apache/spark/pull/4162#discussion_r23504896
--- Diff: ec2/spark_ec2.py ---
@@ -349,6 +350,15 @@ def launch_cluster(conn, opts, cluster_name):
if opts.identity_file is None:
print >> stderr, "ERROR: Must provide an identity file (-i) for
ssh connections."
sys.exit(1)
+
+ if not os.path.exists(opts.identify_file):
+ print >> stderr, "ERROR: The identity file(%s) doesn't exist." %
opts.identity_file
+ sys.exit(1)
+
+ if oct(os.stat(opts.identity_file).st_mode)[-3:] != "600":
--- End diff --
hi, nchammas. I would like to used "os.stat(xx).st_mode & stat.S_IRUSR" to
check the identity file's permissions. 400 or 600 is a magic number, S_IRUSR is
define in posix, to check weather owner has the read permissions.
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