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unix k shell script on dates

Posted on 2009-03-31
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I need a script in ksh that when I provide a month and year as input let us say JAN-2009 then it should split the dates into weeks and I need to store them as

WEEK1_START = '2009-01-01-00.00.00'
WEEK1_END = '2009-01-09-00.00.00'
WEEK2_START =  '2009-01-09-00.00.00'
WEEK2_END = '2009-01-16-00.00.00'
WEEK3_START ='2009-01-16-00.00.00'
WEEK3_END = '2009-01-23-00.00.00'
WEEK4_START = '2009-01-23-00.00.00'
WEEK4_END =  '2009-02-01-00.00.00'

Let me know how to get this.. I wanted weekly dates in this format since I wanted to use the above values in my db2 script which has datetime as datatype.. Thanks!!
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Question by:mahjag
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Expert Comment

by:ozo
ID: 24033703
how do you decide when a week starts and ends?
it looks like your weeks are 8, 9, or 10 days long, and usually start and end on a Friday.
Can you explain the rules for how that works?
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Author Comment

by:mahjag
ID: 24033795
We got this from a customer response and would like to stick with the same dates for any month, let me know if that will be an issue..
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Expert Comment

by:ozo
ID: 24033871
So, always 1st to 9th, 9th to 16th, 16th to 23rd, and 23rd to 1st?
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Accepted Solution

by:
ozo earned 500 total points
ID: 24034127
#!/bin/ksh
JAN=01
FEB=02
MAR=03
APR=04
MAY=05
JUN=06
JUL=07
AUG=08
SEP=09
OCT=10
NOV=11
DEC=12
typeset -n mon=${1%-*}
year=${1#*-}
WEEK1_START=$year-${mon}-01-00.00.00
WEEK1_END=$year-${mon}-09-00.00.00
WEEK2_START=$year-${mon}-09-00.00.00
WEEK2_END=$year-${mon}-16-00.00.00
WEEK3_START=$year-${mon}-16-00.00.00
WEEK3_END=$year-${mon}-16-00.00.00
WEEK4_START=$year-${mon}-23-00.00.00
typeset -Z2 e=$(( $mon % 12 + 1 ))
WEEK4_END=$year-${e}-01-00.00.00
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Author Comment

by:mahjag
ID: 24040419
Hi Ozo

I just ran the script above and got error
./weekly_dates.ksh[14]: typeset: bad option(s)
do you know why?
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Author Comment

by:mahjag
ID: 24040516
I looked at man typeset and did not see option for -n
I changed that value to -x and still got syntax errors. Hope I get a solution that is tested, here is the syntax error..
./weekly_dates.ksh[23]:   % 12 + 1 : syntax error - any clues?
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Author Comment

by:mahjag
ID: 24040584
I know this question is closed - but would like to get some response here to complete the task.
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Expert Comment

by:ozo
ID: 24046784
what version of ksh are you running?
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