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#1 (permalink)

03-11-2008

meeraKh

Registered User

Join Date: Mar 2008

Posts: 13

Weird date difference problem

I am trying to find the difference in days between 2 dates.
I have to extract the 1st date from a filename, which i did using the awk command.
I have to compare this date to today's date and if the difference is greater than 30 days, do something, else do something else.

This is what i wrote

Code:


INVDATE=`echo "SHIP_606400_2008233202_20080206_070308083544.xml"|awk -F_ '{print $4}'`
echo $INVDATE
TODAY=`date +"%Y%m%d"`
echo $TODAY
(( diff=$TODAY-$INVDATE))
echo $diff
if [ $diff -gt 30 ]; then
     #do a
else
  #do b
fi

The result that I got was

Code:

20080206
20080311
105

The difference between the dates is not 105 days, but 34 days.

What am i doing wrong - I am pretty new to Shell programming and am learning through this site.

Thanks in advance.

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linux, mtime, perl, perl regex, regex, ubuntu

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