Re: fooling a non-"stdin redirection accepting" app (colortail)??

[Zenaan Harkness <zen@freedbms.net>]

On 11/24/12, Sven Joachim <svenjoac@gmx.de> wrote:
> On 2012-11-24 08:59 +0100, Zenaan Harkness wrote:
>
>> colortail is not a full replacement for tail - namely, it precludes
>> pipe/|/stdin
>>
>> systemd-journalctl -f gives a non colorized output.
>>
>> Here's my failed attempt to fool colortail into accepting a bash file
>> descriptor in order to pipe journal through colortail:
>>
>> Refer: http://www.tldp.org/LDP/abs/html/io-redirection.html
>
> For programs which do not read standard input,
> http://www.tldp.org/LDP/abs/html/process-sub.html is more interesting.
> See also the "Process Substitution" paragraph in the bash manpage.

Great links, thanks! I shall read them, since:

>> SO, it comes to my mind, that there ought be a way to turn a bash file
>> descriptor, into a file name, to fool colortail in some other way.
>> Perhaps a /proc/$PID/fd/... or some such.
>
> Exactly that is what process substitution achieves.
>
>> Anyone know where to next, in the search for ultimate control over
>> colortail, taming it into submission to the will of systemd-journald?
>
> Probably "colortail -f <(systemd-journalctl -f)" will do the trick.

This doesn't work - I guess "<" is still a redirection to stdin or something.
For colortail, we need to auto-generate the corresponding filename for stdin.

I shall report back if/when I find a solution...