Function vips_sys::g_spawn_sync

pub unsafe extern "C" fn g_spawn_sync(
    working_directory: *const gchar, 
    argv: *mut *mut gchar, 
    envp: *mut *mut gchar, 
    flags: GSpawnFlags, 
    child_setup: GSpawnChildSetupFunc, 
    user_data: gpointer, 
    standard_output: *mut *mut gchar, 
    standard_error: *mut *mut gchar, 
    exit_status: *mut gint, 
    error: *mut *mut GError
) -> gboolean