.. _bag-cat:
=========
bag-cat
=========
.. program:: bag-cat
Synopsis
========
:samp:`bag-cat {[OPTIONS]} {INPUT-FILE-OR--}`
Description
===========
Like UNIX :command:`cat`, the :program:`bag-cat` program makes a
stream of data available on its standard output stream. Unlike UNIX
:command:`cat`, the data is obtained by processing :term:`log file` s.
.. only:: html
.. seealso::
:ref:`rsb:common-options`
The usual RSB-related commandline options are accepted.
:ref:`rsb:idl-options`
The usual IDL-related commandline options are accepted.
:ref:`replay-related-options`
The usual replay-related commandline options are accepted.
.. only:: man
.. include:: common.rst
:start-line: 7
.. include:: common.rst
:start-line: 25
.. option:: --target-stream STREAM-NAME
Stream to which produced output should be sent. Allowed values for
:samp:`{STREAM-NAME}`: ``stdout``, ``standard-output``, ``stderr``,
``error-output``
Examples
========
* .. code-block:: sh
$ bag-cat isr.tide | head
1290275288296
* .. code-block:: sh
$ bag-cat -c 'hyp' -c 'param' /tmp/nao.tide
The above example prints the contents of all :term:`channel` s
matching one of the regular expressions ``hyp`` and ``param``.
* .. code-block:: sh
$ bag-cat --style 'programmable/template :template "${create} ${data}\\n"' mydata.tide
2011-12-13T17:03:25.533535+01:00 blup
2011-12-13T17:03:25.534054+01:00 blup
2011-12-13T17:03:25.534121+01:00 blup
[...]
Caveats
=======
* Individual entries can no longer be distinguished (unless some
in-band properties permit this)
* If multiple channels are printed, the channel from which a given
part of the output originated is no longer apparent (unless some
in-band properties allow determining this)
* Printing channels which contain binary content to a terminal may
mess up the terminal and cause all sorts of mayhem