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g_settings_list_children: only list viable schemas

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Don't return children with invalid schemas from
g_settings_list_children() (ie: missing schemas or mismatched paths).
This prevents gsettings list-recursively from crashing when broken
schemas are installed on the system.

https://bugzilla.gnome.org/show_bug.cgi?id=705688
This commit is contained in:
Ryan Lortie 2013-08-08 18:50:21 +02:00
parent d1e4f3dd1a
commit 27898916d4
1 changed files with 55 additions and 1 deletions
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56
gio/gsettingsschema.c
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@ -701,7 +701,61 @@ g_settings_schema_list (GSettingsSchema *schema,
for (i = 0; i < len; i++)
if (list[i][0] != '.')
schema->items[j++] = g_quark_from_string (list[i]);
{
if (g_str_has_suffix (list[i], "/"))
{
/* This is a child. Check to make sure that
* instantiating the child would actually work before we
* return it from list() and cause a crash.
*/
GSettingsSchemaSource *source;
GVariant *child_schema;
GvdbTable *child_table;
child_schema = gvdb_table_get_raw_value (schema->table, list[i]);
if (!child_schema)
continue;
child_table = NULL;
for (source = schema_sources; source; source = source->parent)
if ((child_table = gvdb_table_get_table (source->table, g_variant_get_string (child_schema, NULL))))
break;
g_variant_unref (child_schema);
/* Schema is not found -> don't add it to the list */
if (child_table == NULL)
continue;
/* Make sure the schema is relocatable or at the
* expected path
*/
if (gvdb_table_has_value (child_table, ".path"))
{
GVariant *path;
gchar *expected;
gboolean same;
path = gvdb_table_get_raw_value (child_table, ".path");
expected = g_strconcat (schema->path, list[i], NULL);
same = g_str_equal (expected, g_variant_get_string (path, NULL));
g_variant_unref (path);
g_free (expected);
if (!same)
{
gvdb_table_unref (child_table);
continue;
}
}
gvdb_table_unref (child_table);
/* Else, it's good... */
}
schema->items[j++] = g_quark_from_string (list[i]);
}
schema->n_items = j;
g_strfreev (list);