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Top Forums Shell Programming and Scripting Converting String Date into UNIX Date Post 303016483 by Saanvi1 on Friday 27th of April 2018 02:43:32 PM
Old 04-27-2018
Converting String Date into UNIX Date

Hi,
I have a string date to my unix script(sun solaris). I wanted to convert it into unix date so that I can use it in a conditional statement. Please see below:

Code:
 
 MyTest.sh -s 2018-05-09
  
suppdt=$1 # string date passed via arguement as 2018-04-09
 
curryr=`date '+%Y'`
nextyr=`expr $curryr + 1`
 
StartDt_v=`echo "${curryr}-05-01"`
EndDt_v=`echo "${nextyr}-08-15"`
  
 curryrfilename=test-import-data-${curryr}.txt
 nextyrfilename=test-import-data-${nextyr}.txt
  
 if [ ${suppdt} -ge ${StartDt_v} ] && [ ${suppdt} -le ${EndDt_v} ]; then
     rm -f nextyrfilename;
 else
    echo " Do nothing"
 fi

The issue is every time the conditional statement is evaluated it goes into else part of IF statement.

I think this might be happening due to the StartDt_v and EndDt_v being a String date instead of proper Date variable. Would appreciate any advice from experts.

Thanks
 

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GMDATE(3)								 1								 GMDATE(3)

gmdate - Format a GMT/UTC date/time

SYNOPSIS
string gmdate (string $format, [int $timestamp = time()]) DESCRIPTION
Identical to the date(3) function except that the time returned is Greenwich Mean Time (GMT). PARAMETERS
o $format - The format of the outputted date string. See the formatting options for the date(3) function. o $timestamp - The optional $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a $timestamp is not given. In other words, it defaults to the value of time(3). RETURN VALUES
Returns a formatted date string. If a non-numeric value is used for $timestamp, FALSE is returned and an E_WARNING level error is emitted. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | The valid range of a timestamp is typically from | | | Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 | | | 03:14:07 GMT. (These are the dates that corre- | | | spond to the minimum and maximum values for a | | | 32-bit signed integer). However, before PHP 5.1.0 | | | this range was limited from 01-01-1970 to | | | 19-01-2038 on some systems (e.g. Windows). | | | | | 5.1.1 | | | | | | | There are useful constants of standard date/time | | | formats that can be used to specify the $format | | | parameter. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 gmdate(3) example When run in Finland (GMT +0200), the first line below prints "Jan 01 1998 00:00:00", while the second prints "Dec 31 1997 22:00:00". <?php echo date("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); echo gmdate("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); ?> SEE ALSO
date(3), mktime(3), gmmktime(3), strftime(3). PHP Documentation Group GMDATE(3)
All times are GMT -4. The time now is 09:33 AM.
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