GIOChannel Tutorial

From: Brook Keele (bkeele_at__NOSPAM_guidedfate.com)
Date: 07/14/03 

Date: Mon, 14 Jul 2003 01:34:52 GMT

Does anyone know any GOOD documentation on GIOChannel? I have been trying
to get a basic Gtk+ 2.2 app running. The gist os to run a command and pipe
the output to a TextView object. After adding the watch, it never gets to
the 'command_read' callback function.

Any help would be appreciated.

Here is a little code example of what I am doing.

on_button1_clicked
{
...
    text = gtk_text_view_get_buffer(GTK_TEXT_VIEW(textview)); pipe(out);

    outch[0] = g_io_channel_unix_new(out[0]); outch[1] =
    g_io_channel_unix_new(out[1]);

    g_io_add_watch(outch[0], G_IO_IN, (GIOFunc) command_read, text);

    result = forkexecv(args, out);
...
}

gboolean
command_read(GIOChannel * channel, GIOCondition condition, gpointer data)
{
    gint fd;
    gint result;
    GtkTextBuffer *buf = GTK_TEXT_BUFFER(data); GtkTextIter *iter;
    gchar curchar;

    if (condition == G_IO_IN) {
        fd = g_io_channel_unix_get_fd(channel); result = read(fd, &curchar, 1);
        if (result == 1) {
            gtk_text_buffer_get_iter_at_offset(buf, iter, -1);
            gtk_text_buffer_insert(buf, iter, &curchar, 1);
        } else
            return FALSE;

        return TRUE;
    }
    return FALSE;
} 

-- 
Brook A. Keele (bkeele@_NOSPAM_guidedfate.com)
----------------------------------------------------------
> ... What will be next, maybe you disable to run non GPL
> executables under linux ?
Actually no. We are researching how to stop trolls posting to the kernel
list as our main AI project.
- Alan Cox on linux-kernel