NAME

       vnl-tail - tail a log file, preserving the legend

SYNOPSIS

        $ read_temperature | tee temp.vnl
        # temperature
        29.5
        30.4
        28.3
        22.1
        ... continually produces data

        ... at the same time, in another terminal
        $ vnl-tail -f temp.vnl
        # temperature
        28.3
        22.1
        ... outputs data as it comes in

DESCRIPTION

         Usage: vnl-tail [options] logfile logfile logfile ... < logfile

       This tool runs "tail" on given vnlog files in various ways. "vnl-tail" is a wrapper around
       the GNU coreutils "tail" tool. Since this is a wrapper, most commandline options and
       behaviors of the "tail" tool are present; consult the tail(1) manpage for detail. The
       differences from GNU coreutils "tail" are

       •   The input and output to this tool are vnlog files, complete with a legend

       •   "-c" is not supported because vnlog really doesn't want to break up lines

       •   "--zero-terminated" is not supported because vnlog assumes newline-separated records

       Past that, everything "tail" does is supported, so see that man page for detailed
       documentation.

BUGS

       This and the other "vnl-xxx" tools that wrap coreutils are written specifically to work
       with the Linux kernel and the GNU coreutils. None of these have been tested with BSD tools
       or with non-Linux kernels, and I'm sure things don't just work. It's probably not too
       effortful to get that running, but somebody needs to at least bug me for that. Or better
       yet, send me nice patches :)

SEE ALSO

       tail(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.

                                            2020-02-04                                VNL-TAIL(1)