# patterned on /usr/include/sysexits.h
 
 EX_OK         = 0
 EX_GENERAL    = 1
 EX_SOMEFAILED = 2    # some parts of the command succeeded, while others failed
 EX_USAGE      = 64   # The command was used incorrectly (e.g. bad command line syntax)
 EX_SOFTWARE   = 70   # internal software error (e.g. S3 error of unknown specificity)
 EX_OSERR      = 71   # system error (e.g. out of memory)
 EX_OSFILE     = 72   # OS error (e.g. invalid Python version)
 EX_IOERR      = 74   # An error occurred while doing I/O on some file.
 EX_TEMPFAIL   = 75   # temporary failure (S3DownloadError or similar, retry later)
 EX_NOPERM     = 77   # Insufficient permissions to perform the operation on S3  
 EX_CONFIG     = 78   # Configuration file error
 _EX_SIGNAL    = 128
 _EX_SIGINT    = 2
 EX_BREAK      = _EX_SIGNAL + _EX_SIGINT # Control-C (KeyboardInterrupt raised)