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Operating Systems Solaris Subtract 2 days from timestamp Post 302981658 by shamrock on Friday 16th of September 2016 02:49:11 PM
Old 09-16-2016
Pitchin' in my 2 cents...
Code:
#!/usr/bin/perl

use warnings;
use Time::Local;
use Time::localtime;

use constant dt => "201609140905";
use constant ti => 2*24*60*60;

$y = substr(dt, 0, 4) - 1900;
$m = substr(dt, 4, 2) - 1;
$d = substr(dt, 6, 2);
$H = substr(dt, 8, 2);
$M = substr(dt, 10, 2);
$S = substr(dt, 12);

$epoch = timelocal($S,$M,$H,$d,$m,$y) - ti;
$tm = localtime($epoch);

printf("%04d%02d%02d",$tm->year+1900,$tm->mon+1,$tm->mday);
printf("%02d%02d\n",$tm->hour,$tm->min);

Save the file and give it a name...for example "my_date_time.pl" and run it on the cmd line as # my_date_time.pl
 

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Time::localtime(3pm)					 Perl Programmers Reference Guide				      Time::localtime(3pm)

NAME
Time::localtime - by-name interface to Perl's built-in localtime() function SYNOPSIS
use Time::localtime; printf "Year is %d ", localtime->year() + 1900; $now = ctime(); use Time::localtime; use File::stat; $date_string = ctime(stat($file)->mtime); DESCRIPTION
This module's default exports override the core localtime() function, replacing it with a version that returns "Time::tm" objects. This object has methods that return the similarly named structure field name from the C's tm structure from time.h; namely sec, min, hour, mday, mon, year, wday, yday, and isdst. You may also import all the structure fields directly into your namespace as regular variables using the :FIELDS import tag. (Note that this still overrides your core functions.) Access these fields as variables named with a preceding "tm_" in front their method names. Thus, "$tm_obj->mday()" corresponds to $tm_mday if you import the fields. The ctime() function provides a way of getting at the scalar sense of the original CORE::localtime() function. To access this functionality without the core overrides, pass the "use" an empty import list, and then access function functions with their full qualified names. On the other hand, the built-ins are still available via the "CORE::" pseudo-package. NOTE
While this class is currently implemented using the Class::Struct module to build a struct-like class, you shouldn't rely upon this. AUTHOR
Tom Christiansen perl v5.12.1 2010-04-26 Time::localtime(3pm)
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