On Sep 30, 2008, at 1:48 PM, "Andrew Farnsworth" <[EMAIL PROTECTED]>
wrote:
> Ok,
> Trying to decipher a Korn Shell script written by someone else.
> What exactly do these two lines do?
>
> cp ${FILE:-null} ${LOG_WEEK_OLD}
> rm -f ${FILE:-null}
>
> I think the first line copies "/dev/null" to the log file,
> overwritting the log file with an empty log file. (i.e. this
> truncates the file), but if that is the case what is with the second
> line? How and why would you want to delete a null?
>
> Thanks,
>
> Andy
I'm just guessing, but I suspect it copies $FILE to $LOG_WEEK_OLD if
$FILE is not null, then deletes $FILE if it is not null.
Brett
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