Re: [PLUG] date format

[JP Vossen <jp@jpsdomain.org>]

On 10/15/2018 12:24 PM, jeff wrote:
> I have lots of backups from my old phone, so naturally none of the 
> calendar backups work. I finally resigned myself to manual input, but 
> even that didn't work.
> 1507075200000 is somehow 10/4/yyyy. Every date is like this.
> It won't format to date, even chucking the leading 1 and/or trailing 
> zeroes. It's almost like it's personal with these phones.
> Has anybody seen this before?
As Jason pointed out that's an Epoch.  Here's something I wrote last 
month for someone at $WORK with a similar need.  It's quite ugly 
brute-force, but...it works.
----
#!/bin/bash -
# 2018-09-12: trivial Epoch converter wrapper

echo "$1" | \
  perl -ne 'use POSIX qw(strftime);
    print "$1 = " ,
      strftime("%Y-%m-%d %H:%M:%S %z\n", gmtime($1))
        if m/^(\d{10}).*$/;'
----

$ ./epoch.sh 1507075200000
1507075200 = 2017-10-04 00:00:00 -0400

Adjust the strftime string (`man date`) as desired and wrap the rest in 
a loop or something.  Or post a sample of the data/file format and I or 
someone else can tweak to handle it.  Python does it cleaner, but I know 
Perl and Perl does nice one-timers. :-)
Contortions using GNU `date` will work too.  Chapter 11 of the _Bash 
Cookbook_ is devoted to "Working with Dates and Times" and uses a lot of 
GNU `date`.
Later,
JP
--  -------------------------------------------------------------------
JP Vossen, CISSP | http://www.jpsdomain.org/ | http://bashcookbook.com/
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