acpi_sstate_to_sname
static const char *acpi_sstate_to_sname(int sstate);
sbuf_printf(&sb, "%s ", acpi_sstate_to_sname(state));
strlcpy(name, acpi_sstate_to_sname(old_sstate), sizeof(name));
strlcpy(sleep_state, acpi_sstate_to_sname(old_sstate), sizeof(sleep_state));