[systemd-devel] [PATCH] journalctl: allow customizable output formats

[Daurnimator]

On 22 September 2014 11:33, Daniel P. Berrange <berrange at redhat.com> wrote:

> The current '--output FORMAT' argument defines a number of
> common output formats, but there are some useful cases it
> does cover. In particular when reading application logs it
> is often desirable to display the code file name, line number
> and function name. Rather than defining yet more fixed output
> formats, this patch introduces user defined output formats.
>
> The format string is an arbitrary string which contains a
> mixture of literal text and variable subsistitions. Each
> variable name corresponds to a journal field name. A variable
> name can be optionally followed by a data type, and in the
> case of string types, a length limit.
>

As an opposing point of view, I've been accomplishing this by piping output
through a script that parses and displays JSON.
I rather this style of composability than passing format strings to
journalctl itself.
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