NAME¶

vnl-tac - concatenate and print vnlog data in reverse

SYNOPSIS¶

 $ cat tst.vnl
 # time temperature
 1.0 29.5
 2.0 30.4
 3.5 28.3
 6.0 22.1
 $ vnl-tac tst.vnl
 # time temperature
 6.0 22.1
 3.5 28.3
 2.0 30.4
 1.0 29.5

DESCRIPTION¶

  Usage: vnl-tac < input.vnl
         vnl-tac input.vnl

This tool runs "tac" on given vnlog streams. "vnl-tac" is a wrapper around the GNU coreutils "tac" tool. The commandline options of "tac" don't make sense in the context of vnlog, so only one vnlog-specific option is supported:

•

By default we call the "tac" tool to do the actual work. If the underlying tool has a different name or lives in an odd path, this can be specified by passing "--vnl-tool TOOL"

See the "tac" manpage for detailed documentation.

COMPATIBILITY¶

I use GNU/Linux-based systems exclusively, but everything has been tested functional on FreeBSD and OSX in addition to Debian, Ubuntu and CentOS. I can imagine there's something I missed when testing on non-Linux systems, so please let me know if you find any issues.

SEE ALSO¶

tac(1)

REPOSITORY¶

https://github.com/dkogan/vnlog/

AUTHOR¶

Dima Kogan "<dima@secretsauce.net>"

LICENSE AND COPYRIGHT¶

Copyright 2018 Dima Kogan "<dima@secretsauce.net>"

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.