Hi,
Martin Klier wrote:
> Hi Linux Admins,
>
> is there a command to get something like "thrid friday of july" or "second
> wednesday each month"? I crossread the manuals for date and gcal, but it
> seems to be impossible. Next thing I found was gcal, with
> "--period-of-fixed-dates", but I have not been able to get useful results,
> and
> date -d "35 tuesday" (35th tuesday of a year), but I have not been able to
> limit it to months nor selecting the year (by the way, I do not need it).
>
> Has somebody experience with this one, and can you give me a hint where to
> look, or even an example?
>
> Thanks a lot in advance,
I love the --date GNU extension, but I tried a number of different
syntaxes to get it to do what you wanted without any luck. So I thought
a one line pipe would be fun:
cal 7 2007 | awk -F. 'NR > 2{print substr($1,5*3+1,2)}' | grep '[0-9]' |
awk 'NR == 3 {print $1}'
You set the day you're interested in through the first integer of the
second parameter of the substr call of the awk command. 0=Sunday
(0*3+1), 1=Monday (1*3+1) etc. You set the week number with the 'NR ==
n' part of the final awk. You set the month and year with the
parameters to cal. It invokes awk twice which if used in a very tight
loop could be a problem. It would be easy to merge the awk | grep | awk
into one awk command, but it starts to look more like program code on a
single line rather than a series of simple(-ish) commands.
Cheers
Adam
-
To unsubscribe from this list: send the line "unsubscribe linux-admin" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
