Shell Programming and Scripting

Hi

I have 1 question regarding using date in shell script.Can we use for loop with date

Req

1. I need to run the loop for certain date range
2. Check each date in loop that is Sunday or last day of month then exit 0
3. also if the date is 1 day before last day of month and also is Friday we need to exit 0

---------- Post updated at 10:52 AM ---------- Previous update was at 07:53 AM ----------

somebody please

What shell do you use? Can you use GNU date? With the last it's easy enough. Something like this:

Code:

#!/bin/sh

LANG=C

start='2011/02/01'
end='2011/05/31'

cur="$start"
while [ "$cur" != "$end" ]; do
    # check for everything for example
    [ `date -d"$cur" "+%a"` = Sun ] && exit 0

    # another checks

    cur=`date -d"$cur 1 day" "+%Y/%m/%d"` 
    # echo $cur
done

PS It's very inconvenient when you read a question and do not know what the system is and what utilities are possible to use. For example, a lot of people couldn't use GNU programs. And somebody can lose 10 or 20 minutes only to hear - "excuse me it's not for me". It's especially not very good when you do not ask for a simple question, but to write a little program.

Sorry for my English.