How to tell when a script is executed by cron ?

[Grant Edwards]

In article <pan.2003.02.05.05.20.31.693008 at scu.edu.au>, Simon Dobner wrote:
> On Wed, 05 Feb 2003 11:41:45 +1100, Simon Dobner wrote:
> 
>> I want to know how to tell if a script is being executed in the background
>> by cron, as opposed to running in the foreground from the command prompt.
> 
> OK, I had a bit of a play and came up with this
> 
> import sys
> import termios
> 
> try:
>     termios.tcgetattr(sys.stdout)
>     #this IS a terminal, therfore we are running interactivly
>     # Do nothing
> except:
>     #this is NOT a terminal so
>     logfile = open('/tmp/logfile', 'w')
>     sys.stdout = logfile

You can also use 

 if os.isatty(sys.stdout.fileno()):
      # we're running interactively
 else:
      # batch mode

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