Re: [Vala] Reading last n lines from file

[Ben Iofel <iofelben gmail com>]

If it's a small file, you could read the whole thing into a string using
GLib.FileUtils.get_contents and then just grab the part you want

On Wed, Oct 7, 2015 at 11:02 AM Guillaume Poirier-Morency <
guillaumepoiriermorency gmail com> wrote:

> Le mercredi 07 octobre 2015 à 10:16 -0400, Serge Hooge a écrit :
> > Hello, folks.
> >
> > I am currently writing a small program with Vala/ncurses and I have
> > suddenly found the need to read last n lines of a constantly changing
> > file for display in an ncurses window.
> >
> > What would be the easiest way to go about it in Vala?
> > It doesn't look like GIO is an option without a giant data stream
> > kludge, but I kind of need it to create and delete some files along
> > the
> > way.
>
> You can use a DataInputStream http://valadoc.org/#!api=gio-2.0/GLib.Dat
> aInputStream and seek approximately to n * average bytes per line from
> the end and read the following data with read_line. It should read
> approximately n lines quite efficiently.
>
> You can trigger the operation with a FileMonitor http://valadoc.org/#!a
> pi=gio-2.0/GLib.FileMonitor
> <http://valadoc.org/#!api=gio-2.0/GLib.FileMonitor>
>
> The other approach involve a subprocess that calls tail.
>
> > Cheers,
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > https://mail.gnome.org/mailman/listinfo/vala-list
> --
> Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>
>
> Étudiant au baccalauréat en Informatique à l'Université de Montréal
> Développeur d'application web
>
> Mon blog: https://arteymix.github.io
> Mon projet de coopérative: https://pittoresque.github.io
> Clé PGP: B1AD6EA5
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