c_g_spawn_sync

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
gboolean function(gchar* workingDirectory, gchar** argv, gchar** envp, GSpawnFlags flags, GSpawnChildSetupFunc childSetup, void* userData, gchar** standardOutput, gchar** standardError, gint* exitStatus, GError** error) c_g_spawn_sync;

Meta