Re: where is error? (Glib::spawn_async)

["Jonathon Jongsma" <jonathon jongsma gmail com>]

On 11/2/06, Paul Pogonyshev <pogonyshev gmx net> wrote:
> Hi.
>
> Where is error in this code fragment?
>
>       std::vector <std::string>  yelp_arguments;
>
>       yelp_arguments.push_back ("yelp");
>       yelp_arguments.push_back ("ghelp:///usr/share/gnome/help/gedit/C/gedit.xml");
>
>       try
>         {
>           Glib::spawn_async (".", yelp_arguments, std::vector <std::string> (),
>                              Glib::SPAWN_SEARCH_PATH);
>           return;
>         }
>       catch (Glib::Error& exception)
>         {
>           g_print ("%s...\n", exception.what ().c_str ());
>         }
>
> I get this in terminal:
>
>     (yelp:14036): Gtk-WARNING **: cannot open display:
>
> and Yelp window is never shown.
>
> Paul

Looking at the glibmm source, it looks like there may be a bug in the
wrapper.  In the C version g_spawn_async, you're supposed to pass a
NULL pointer for the envp parameter if you want to inherit the
environment of the parent (e.g. the DISPLAY variable, etc).  But when
you pass an empty vector to the glibmm version, it doesn't appear to
translate that to NULL, which is probably what you want

--
jonner