Function sceUtilitySetSystemParamString 

pub unsafe extern "C" fn sceUtilitySetSystemParamString(
    id: c_int,
    str: *const c_char,
) -> c_int

Set String System Parameter

@param id - which parameter to set @param str - char * value to set @return 0 on success, PSP_SYSTEMPARAM_RETVAL_FAIL on failure