On Mon, Feb 02, 2004 at 11:44:37PM -0600, Michael Chaney wrote:
> If you're using Linux, and the GNU date app, you can do this:
>
> % date -d tomorrow +%d
>
> That gives you the "day of the month" part of the date, for tomorrow.
> If it's "01", then today must be the last day of the month. Now, just
> compare the output of the command to "01". How you do this depends on
> what shell you use, hopefully it's a Bourne shell (/bin/sh, bash,
> probably ksh, too):
>
> if [ $(date -d tomorrow +%d) = "01" ]; then echo "It's the last day!"; fi
>
> In a shell script, it'll probably look more like this:
>
> if [ $(date -d tomorrow +%d) = "01" ]; then
> echo "It's the last day!"
> # do some other stuff here
> fi
One more point in this saga. If you want to run something on the last
Tuesday of the month, for instance, you can use code like this:
if [ $(date +%w) = "2" ]; then
echo It's Tuesday
if [ $(date -d "+ 1 week" +%m) != $(date +%m) ]; then
echo This is the last occurance of this particular weekday this month
fi
fi
And, finally, the date command that comes with FreeBSD uses similar
syntax, but instead of the "-d" use "-v" such as this:
date -v+1w
That will add one week to the current date before printing.
Michael
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Michael Darrin Chaney
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http://www.michaelchaney.com/
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