Re: Call external programs and keep showing its outputs

[Kang Hu <hukangustc gmail com>]

see https://developer.gnome.org/glib/2.38/glib-Spawning-Processes.html#g-spawn-async-with-pipes

1. call g_spawn_async_with_pipes and get the stdin, stdout, stderr fds.

2. call g_child_watch on the pid returned in step 1.

3. create an io channel for each fd ( see g_io_channel_unix_new)

4. add each io channel to the main loop ( see g_io_add_watch) .

   read external  application output (see g_io_channel_read_*)  in the callback function GIOFunc 

   and update your widget's text section

5. you can kill external programs by the pid you get in step 1.

NOTE: you need to release fds in callbacks in step 2.

On Thu, Oct 10, 2013 at 12:55 PM, Woody Wu <narkewoody gmail com> wrote:

Hi,

I am about to write a test runner with GTK+. It basically can list a lot
of external test programs (non-GTK+ pure Linux apps) in a treeview and
let user select one of them to run. While an external program is
running, I want to get all its outputs (to stdout/stderr) and keep
updating in a textview.

Since I am a Linux programmer, so I know how to fork a new process and
pipe into an external program. But I don't know in GTK+, what's the
right method to keep fetching the information from the pipe and showing
them in my GUI widgets.  On the other hand, while an external program is
running, I don't want user feel that the my program is frozing and user
should be able to kill the running external program by clicking a 'stop'
button on the GUI.

For this kind of task, what GTK+ technology I should go to grab?  Thanks
in advance!

--
I can't go back to yesterday - because I was a different person then
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