Created
          April 29, 2019 08:34 
        
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  | if __name__ == '__main__': | |
| pid_file = cur_file_dir() + '/logstat.pid' | |
| fp = open(pid_file, 'w') | |
| try: | |
| fcntl.lockf(fp, fcntl.LOCK_EX | fcntl.LOCK_NB) | |
| except IOError: | |
| # another instance is running | |
| sys.exit(0) | 
  
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