Save log file at different place to prevent permission error.

    For root: /tmp/berrynet.log
    For user: $HOME/.cache/berrynet.log

Signed-off-by: Bofu Chen (bafu) <bofu@dt42.io>

berrynet/__init__.py

@@ -1,4 +1,12 @@
+import os
+
 from logzero import setup_logger
 
 
-logger = setup_logger(name='berrynet-logger', logfile='/tmp/berrynet.log')
+# Save log file at different place to prevent permission error.
+if os.geteuid() == 0:  # root
+    LOGGING_FLLEPATH='/tmp/berrynet.log'
+else:
+    LOGGING_FLLEPATH='{}/.cache/berrynet.log'.format(os.getenv('HOME'))
+
+logger = setup_logger(name='berrynet-logger', logfile=LOGGING_FLLEPATH)