Convert Epcoh seconds in a stream

Convert Epoch seconds in a stream

Here is the perl script, put it somewhere like /usr/local/bin/convertepoch

#!/usr/bin/perl
print "This program reads epoch seconds from stdin and converts them, ctrl-d to end/cancel\n";

while (<>) {
   if ($_ =~ m/(\d\d\d\d\d\d\d\d\d\d)/){
      $epoch=$1;
      chomp($epoch);
      $_ =~ s/$epoch//;
      print "(", scalar localtime $epoch, ") $_";
   } else {
      print $_;
   }
}

You can now use it in a stream like tail -f /var/log/mylogfile |convertepoch and you will turn

1198878644  some really usefull log entry that you would love to know when it happened

into the slightly more useable

(Fri Dec 28 13:50:44 2007) some really usefull log entry that you would love to know when it happened

Here is a Python version, put it somewhere like /usr/local/bin/convertepoch

#!/usr/bin/env python3
import re
import sys
import time

print("This program reads epoch seconds from stdin and converts them, ctrl-d to end/cancel")

epoch_pattern = '(\d\d\d\d\d\d\d\d\d\d)'
for line in sys.stdin:
    epoch_str = re.search(epoch_pattern, line)
    if epoch_str:
        epoch = int(epoch_str.group())
        timestamp = time.strftime("%a %b %d %H:%M:%S %Y", time.localtime(epoch))
        print(line.replace(epoch_str.group(), timestamp))
    else:
        print(line)