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Full Discussion: Display previous days dates in ksh
Top Forums Shell Programming and Scripting Display previous days dates in ksh Post 302880156 by pr5439 on Wednesday 18th of December 2013 01:34:32 PM
Old 12-18-2013
hi,
Problem is similar so tried continuing in the same thread than opening a new one. the problem now is i am trying to calculate time elapsed between two instances, at present i am using below in awk where date command doesn't work:
Code:
std=substr($2,4,2) ;                          #start date
end=substr($4,4,2) ;                         #end date
mul=((end-std)-1);                           #no: of full days elapsed in the interval
t1=(3600*substr($3,1,2)+60*substr($3,4,2)+substr($3,7,2)); #total no: of start time seconds
t2=(3600*substr($5,1,2)+60*substr($5,4,2)+substr($5,7,2)); #total no: of end time seconds
if (mul == "-1")                                 #both instances in the same day
t=t2-t1;
else                                               #instances occur in two different days
t=((24*3600)-t1)+(mul*24*3600)+t2;
printf("%02d:%02d:%02d\n",(t/3600),((t/60)%60),t%60);      #time elapsed in HH:MM:YY format

my input file will be like
name1 12/16/2013 10:56:38 12/16/2013 10:59:37 value1
name2 12/16/2013 04:37:41 12/17/2013 11:34:19 value2

and so on(a sequence of such records)

the problem again is the same. If start of the month appears with date 01 the previous day would be 31 or 30 or 28 (or 29 ) and my logic above wont work then.
One way is i hard code such inatances with month values in case statement. But just want to know if there is some better option to deal this ?
Any help will be gratefully welcome :-)

---------- Post updated 12-18-13 at 01:34 PM ---------- Previous update was 12-17-13 at 05:40 PM ----------

Does any one have any update? Atleast someone reply that there is no other way to do. Please make a reply so that I try some approach of mine.
Last edited by pr5439; 12-17-2013 at 06:57 PM.. Reason: more explaination
 

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LEARN ABOUT DEBIAN

suspend

suspend(1)                                                         User Commands                                                        suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                         suspend(1)
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