in reply to Re^2: Converting POSIX format date/times to epoch seconds
in thread Converting POSIX format date/times to epoch seconds

I needed to convert the date from the WMIC command output so I added a block to the code (using a copy anyway for other reasons). it is small enough to customize and here is a small customization (which can probably be improved). I wanted to have a "better" way of determining up time - converting the boot time then taking the delta seemed to be a simple solution. FYI - Win32::GetTickCount was returning 13 days (in ms) on my machine which has been up for 150something days. using this change and time() function to get a delta produced a correct result. 

    # WMIC (Windows command line) Date output format from `wmic os get
+ lastbootuptime`

    (($yr, $mon, $day, $hr, $min, $sec) =
    /^
      (\d{4})             # year
      (\d\d)              # numerical month
      (\d\d)              # day
      (\d\d)              # Hour
      (\d\d)              # Min
      (\d\d)              # Sec
    /x)

    ||

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Re^4: Converting POSIX format date/times to epoch seconds
by Anonymous Monk on Oct 21, 2014 at 15:31 UTC

    for those who come here looking for the boot time, here is a program to convert the wmic format boot time to seconds then redisplay it. I cloned the HTTP::Date code then chopped it down to this. also being posted on http://www.perlmonks.org/?node_id=216892 

    use strict;
use Time::Local;

sub wmic2time (;$)
{
    my $wmic_time_in=$_[0];
    if(!defined $wmic_time_in)
    {
        $wmic_time_in=join " ",`wmic os get lastbootuptime 2>&1`;
        $wmic_time_in=~s/\r\n/ /g;
        $wmic_time_in=~s/ * / /g;
    }
    $wmic_time_in=~s/LastBootUpTime //i;      # caller may have remove
+d this already but just in case....
    my @d = $wmic_time_in =~ /^(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)/x
+;             # year numerical month day Hour Min Sec

    return undef unless @d;
    $d[1]--;        # month

    return eval { my $t = Time::Local::timelocal(reverse @d);
                  $t < 0 ? undef : $t;
                };
}

my $newtime=wmic2time;
print "$newtime\n";

print scalar localtime $newtime . "\n";

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