Re: Glib::IO->add_watch

On Thu, Apr 4, 2019 at 6:45 AM Jeff via gtk-perl-list
<gtk-perl-list gnome org> wrote:

On 03/04/2019 00:35, Daniel Kasak via gtk-perl-list wrote:
Hi all. I'm trying to adapt some code I have for tailing the output of
an app. When I fork using open() ... things work ( I have some issues
with tail never exiting, but that's to be expected ). When I open a
filehandle for reading these redirected log files however, my callback
I passed to add_watch() gets called in a busy loop, and nothing else
happens. I assume I'm just doing something simple wrong? What is that
thing? :) Thanks ...

The _watch_cmd() sub in gscan2pdf does what you want - uses
Glib::IO->add_watch() on stdout and stderr and triggers a callback on
every line read:

Thanks for the response Jeff ... but the example you linked is very
similar to what I have ( in another codebase ) that works. ie I don't
have problems with this method when *forking* a process - it works
really well. I have problems with this method when I want to tail ( or
use Glib::IO->add_watch() on ) STDOUT & STDERR of the *current*


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