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Full Discussion: Date and Time comparison using shell script
Top Forums Shell Programming and Scripting Date and Time comparison using shell script Post 302588266 by ahamed101 on Sunday 8th of January 2012 01:17:57 AM
Old 01-08-2012
Using awk

Code:
cat infile
20111220|102000

Code:
awk -F"|" '{ x=$1;y=$2;
  diff=systime()-mktime(substr(x,0,4)OFS substr(x,5,2)OFS substr(x,7,2)OFS substr(y,0,2)OFS substr(y,3,2)" 00")
  print diff/3600 " Hours"
}' infile

If solaris, use nawk

Using date command
Code:
#!/bin/bash

read data < infile

DATE=${data%%|*}
TIME=$( echo ${data##*|} | sed 's/../&:/g;s/:$//' )

sec=$( date -d "$DATE $TIME" +%s )
curr=$( date +%s )

((diff=(curr-sec)/3600))
echo "$diff Hours"

--ahamed
This User Gave Thanks to ahamed101 For This Post:
buzzusa
 

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LEARN ABOUT DEBIAN

perl::critic::policy::builtinfunctions::prohibitlvaluesubstr

Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSuUser(Contributed Perl DocPerl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3pm)

NAME

       Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument "substr" instead of writing "substr($foo, 2, 6) = $bar".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Conway discourages the use of "substr()" as an lvalue, instead recommending that the 4-argument version of "substr()" be used instead.

	   substr($something, 1, 2) = $newvalue;     # not ok
	   substr($something, 1, 2, $newvalue);      # ok

       The four-argument form of "substr()" was introduced in Perl 5.005.  This policy does not report violations on code which explicitly
       specifies an earlier version of Perl (e.g. "use 5.004;").

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       "substr" in perlfunc (or "perldoc -f substr").

       "4th argument to substr" in perl5005delta

AUTHOR

       Graham TerMarsch <graham@howlingfrog.com>

COPYRIGHT

       Copyright (c) 2005-2011 Graham TerMarsch.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-06-07	 Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3pm)
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