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Top Forums Shell Programming and Scripting Day difference between 2 dates Post 302541675 by yoavbe on Monday 25th of July 2011 09:57:24 AM
Old 07-25-2011
Day difference between 2 dates

Hello!
I need to calculate number of days between two dates.
The first date is in format of string.
The second one is in format of date (current date):

Code:
#!/usr/bin/ksh
export ORACLE_HOME=/software/oracle/PROD10gR2
cd /etc/ORACLE/WALLETS/oracle
export EXP_DATE=`. $ORACLE_HOME/bin/orapki cert display -cert  ca64.cer -summary| grep "Valid Until"|cut -f -4`

STRING=$EXP_DATE
STRING=${STRING#???????????????????}
BSTRING=${STRING%????????????????????????}
ESTRING=${STRING#??????????????????????????}
NEW_EXP_DATE=$BSTRING$ESTRING
echo $NEW_EXP_DATE

cur_time=`date +"%h %d %EY"`
last_date=`date -d $NEW_EXP_DATE +"%h %d %EY"`

The last command is failed with error:
date: extra operand `2011'

How can we convert this script to date and then calculate the day difference?

Thank you.

Last edited by radoulov; 07-25-2011 at 10:58 AM.. Reason: Code tags!
 

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DATETIME.SETISODATE(3)							 1						    DATETIME.SETISODATE(3)

DateTime::setISODate - Sets the ISO date

       Object oriented style

SYNOPSIS
public DateTime DateTime::setISODate (int $year, int $week, [int $day = 1]) DESCRIPTION
Procedural style DateTime date_isodate_set (DateTime $object, int $year, int $week, [int $day = 1]) Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates. PARAMETERS
o $object -Procedural style only: A DateTime object returned by date_create(3). The function modifies this object. o $year - Year of the date. o $week - Week of the date. o $day - Offset from the first day of the week. RETURN VALUES
Returns the DateTime object for method chaining or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Changed the return value on success from NULL to | | | DateTime. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 DateTime.setISODate(3) example Object oriented style <?php $date = new DateTime(); $date->setISODate(2008, 2); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; ?> Procedural style <?php $date = date_create(); date_isodate_set($date, 2008, 2); echo date_format($date, 'Y-m-d') . " "; date_isodate_set($date, 2008, 2, 7); echo date_format($date, 'Y-m-d') . " "; ?> The above examples will output: 2008-01-07 2008-01-13 Example #2 Values exceeding ranges are added to their parent values <?php $date = new DateTime(); $date->setISODate(2008, 2, 7); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 2, 8); echo $date->format('Y-m-d') . " "; $date->setISODate(2008, 53, 7); echo $date->format('Y-m-d') . " "; ?> The above example will output: 2008-01-13 2008-01-14 2009-01-04 Example #3 Finding the month a week is in <?php $date = new DateTime(); $date->setISODate(2008, 14); echo $date->format('n'); ?> The above examples will output: 3 SEE ALSO
DateTime.setDate(3), DateTime.setTime(3). PHP Documentation Group DATETIME.SETISODATE(3)
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