Re: watching a file descriptor in gtk3

[rbd <rbd soest hawaii edu>]

Eric (cecashon aol com) sent me the following earlier today in response to 
another discussion thread I started a few days ago re: GSubProcess:

> I put together a test example of GSubprocess. ...
>
>
> https://github.com/cecashon/OrderedSetVelociRaptor/blob/master/Misc/Pipes/gnuplot5.c

In an amazing bit of coincidence, Eric's example contains the following 
bit of code which would seem to have some bearing on this file descriptor 
watch discussion thread:

>  GSource *source=g_pollable_input_stream_create_source((GPollableInputStream*)err_stream, 
NULL);
>  g_source_attach(source, NULL);
>  g_source_set_callback(source, (GSourceFunc)read_err, NULL, NULL);

Could this be yet another way to skin my cat? Perhaps better than the 
GIOChannel, if not the g_source_add_unix_fd() solution? Looks like I could 
create my own GInputStream with

  GInputStream *gis= g_unix_input_stream_new(mypipefd, FALSE);

and then use that stream (which should also be a GPollableInputStream, 
yes?) in the call to g_pollable_input_stream_create_source(). I had not 
intended to use stream (i.e., buffered) i/o, but there's probably no harm 
in doing so. This seems like a perspiration-free way to create the GSource 
I need.

Thanks doubly, Eric!

Roger