Re: Can we have process names and stdout / stderr indication to more efficiently parse build logs? (was: Re: [gentoo-dev] rfc: escape sequences in logs)

[Kent Fredric]

On 4 September 2013 21:59, Michał Górny <mgorny@g.o> wrote:

> And how are you going to implement this? I doubt that fd/vt input has
> any sort of 'writing process id' indicator.
>


Though granted, my other post is not going to be useful on a line-by-line
basis.

The obvious easy approach is have an exec launcher of some kind that
launches processes with IO redirected to an intermediary process that
simply prepends arbitrary strings to every line sent to them, prior to
those processes piping the data to the final aggregate output.

But this would require large amounts of pipe work and fork+ipc magic.

Its surely doable, I recall seeing parts of paludis that do stuff like this.

Just those pipes are inherently easy to break in my experience.



-- 
Kent