Bug 2222286

Summary:	tuna without a subcommand on a machine without a display doesn't exit gracefully
Product:	Red Hat Enterprise Linux 9	Reporter:	John Kacur <jkacur>
Component:	tuna	Assignee:	John Kacur <jkacur>
Status:	NEW ---	QA Contact:	Qiao Zhao <qzhao>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.4	CC:	bhu, mstowell, qzhao, rt-maint
Target Milestone:	rc	Keywords:	Triaged
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Hardware:	Unspecified
OS:	Unspecified
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description John Kacur 2023-07-12 14:37:26 UTC

If you run tuna without a subcommand it tries to run a gui.
If you are installed on a server without a display you get some kind of an error message. It would be better to detect the situation and exit gracefully with some kind of an explanation or usage message.
You get the same result when you issue the gui subcommand

Comment 1 John Kacur 2023-07-12 14:41:12 UTC

 su -c "tuna gui"
Password:(tuna:7645): Gtk-CRITICAL **: 11:31:55.573: _gtk_css_lookup_resolve: assertion '(((__extension__ ({ GTypeInstance *__inst = (GTypeInstance*) ((provider)); GType __t = ((_gtk_style_provider_private_get_type ())); gboolean __r; if (!__inst) __r = (0); else if (__inst->g_class && __inst->g_class->g_type == __t) __r = (!(0)); else __r = g_type_check_instance_is_a (__inst, __t); __r; }))))' failed
/usr/lib/python3.9/site-packages/tuna/tuna_gui.py:40: Warning: g_object_set_data_full: assertion 'G_IS_OBJECT (object)' failed
  self.wtree.add_objects_from_file(tuna_glade, ("mainbig_window", "tuna"))(tuna:7645): Gtk-ERROR **: 11:31:55.573: Can't create a GtkStyleContext without a display connection
Trace/breakpoint trap (core dumped)
[acme@nine linux]$