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Full Discussion: Difference between two date
Top Forums Shell Programming and Scripting Difference between two date Post 302942863 by rogerben on Saturday 2nd of May 2015 11:17:32 AM
Old 05-02-2015
Difference between two date
Hi,
I created a script for finding the duration of a job using the start and end time of the job. But the command doesnt calculate correct value if the duration is more than 24 hours. Any help would be really good

.
Code:
cat test1    --- start time
03/27/15 17:41:00
03/24/15 11:58:04
03/23/15 06:00:00

cat test2    --- end time
03/27/15 17:51:30
03/24/15 18:14:01
03/24/15 07:00:00

Calculating difference using the below command
let DIFF=(`date +%s -d "$b"` - `date +%s -d "$a"`)   // calculating the duration in seconds
echo|date -u -d @${DIFF} +"%H"h" %M"m""  // converting into H:M format.

output

00h 10m   -- correct value
06h 15m   --  correct value
01h 00m   -- In correct value . Instead of 25h printing 1h as its not deducting the day from 24 to 23.

rogerben
 

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LEARN ABOUT CENTOS

std::chrono::duration

std::chrono::duration< _Rep, _Period >(3)		     Library Functions Manual			 std::chrono::duration< _Rep, _Period >(3)

NAME

       std::chrono::duration< _Rep, _Period > -

SYNOPSIS

   Public Types
       typedef _Period period
       typedef _Rep rep

   Public Member Functions
       duration (const duration &)=default
       template<typename _Rep2 , typename  = typename enable_if<is_convertible<_Rep2, rep>::value		 &&
	   (treat_as_floating_point<rep>::value 		   || !treat_as_floating_point<_Rep2>::value)>::type> constexpr duration (const
	   _Rep2 &__rep)
       template<typename _Rep2 , typename _Period2 , typename  = typename enable_if<treat_as_floating_point<rep>::value 	     ||
	   (ratio_divide<_Period2, period>::den == 1		    && !treat_as_floating_point<_Rep2>::value)>::type> constexpr duration (const
	   duration< _Rep2, _Period2 > &__d)
       constexpr rep count () const
       template<typename _Rep2	= rep> enable_if
	   <!treat_as_floating_point
	   < _Rep2 >::value, duration & >
	   ::type operator%= (const rep &__rhs)"
       template<typename _Rep2	= rep> enable_if
	   <!treat_as_floating_point
	   < _Rep2 >::value, duration & >
	   ::type operator%= (const duration &__d)"
       duration & operator*= (const rep &__rhs)
       constexpr duration operator+ () const
       duration & operator++ ()
       duration operator++ (int)
       duration & operator+= (const duration &__d)
       constexpr duration operator- () const
       duration & operator-- ()
       duration operator-- (int)
       duration & operator-= (const duration &__d)
       duration & operator/= (const rep &__rhs)
       duration & operator= (const duration &)=default

   Static Public Member Functions
       static constexpr duration max ()
       static constexpr duration min ()
       static constexpr duration zero ()

Detailed Description
   template<typename _Rep, typename _Period = ratio<1>>struct std::chrono::duration< _Rep, _Period >
       duration

       Definition at line 63 of file chrono.

Author
       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++							  Tue Jun 10 2014			 std::chrono::duration< _Rep, _Period >(3)
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